diff --git a/.envrc b/.envrc
index 3550a30..99764ea 100644
--- a/.envrc
+++ b/.envrc
@@ -1 +1 @@
-use flake
+use flake .#impure
diff --git a/.forgejo/workflows/ci.yml b/.forgejo/workflows/ci.yml
index 6ce781f..7fcb54b 100644
--- a/.forgejo/workflows/ci.yml
+++ b/.forgejo/workflows/ci.yml
@@ -5,7 +5,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  check:
+  build-and-lint:
     name: Lint, Check & Test
     runs-on: nix
 
@@ -16,12 +16,8 @@ jobs:
       - run: nix --version
       - run: nix flake check
 
-  build:
-    name: Build Package
-    runs-on: nix
+      - name: Install the project
+        run: 'nix develop .#impure --command bash -c "uv sync --locked --all-extras --dev"'
 
-    steps:
-      - name: Check out Repository
-        uses: https://git.konstantinfickel.de/actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
-
-      - run: nix build
+      - name: Test with PyTest
+        run: nix develop .#impure --command bash -c "uv run pytest --junit-xml test-report.xml"
diff --git a/.gitignore b/.gitignore
index f1f0b4c..2b9abaa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,24 +1,179 @@
-# Rust build artifacts
-/target/
+# Created by https://www.toptal.com/developers/gitignore/api/python
+# Edit at https://www.toptal.com/developers/gitignore?templates=python
 
-# IDE
-.idea/
-.vscode/
-*.swp
-*.swo
-*~
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
 
-# OS
-.DS_Store
-Thumbs.db
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+# End of https://www.toptal.com/developers/gitignore/api/python
 
-# Nix
 .direnv
-result
-result-*
-
-# Test artifacts
-*.profraw
-*.profdata
-
-.pre-commit-config.yaml
+test-report.xml
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..46f707d
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,11 @@
+repos:
+  - repo: https://github.com/astral-sh/uv-pre-commit
+    rev: 0.7.13
+    hooks:
+      - id: uv-lock
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.12.0
+    hooks:
+      - id: ruff
+        args: [ --fix ]
+      - id: ruff-format
\ No newline at end of file
diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..da71773
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.14.3
diff --git a/CLAUDE.md b/CLAUDE.md
deleted file mode 100644
index 3ca95b6..0000000
--- a/CLAUDE.md
+++ /dev/null
@@ -1,35 +0,0 @@
-# CLAUDE.md
-
-This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
-
-## Build & Test Commands
-
-```bash
-nix develop              # Enter dev shell with Rust toolchain
-nix build                # Build the package
-nix flake check          # Run all checks (clippy, fmt, tests, pre-commit)
-
-# Inside nix develop:
-cargo test               # Run all tests
-cargo test test_name     # Run a specific test
-cargo clippy             # Lint
-cargo fmt                # Format
-```
-
-## Architecture
-
-Streamd parses markdown files into hierarchical **Shards**, then **localizes** them by assigning temporal moments and dimensional placements based on `@Tag` markers.
-
-**Data flow:** Markdown → `extract::parser` → `Shard` tree → `localize::shard` → `LocalizedShard` tree
-
-**Key modules:**
-- `models/` — Core types: `Shard`, `LocalizedShard`, `Dimension`, `Marker`, `Timecard`
-- `extract/` — Tag extraction (`tag_extraction.rs`) and markdown parsing (`parser.rs`)
-- `localize/` — DateTime extraction, configuration merging, shard localization
-- `timesheet/` — State machine that converts localized shards into timecards
-- `query/` — Recursive search functions for finding shards by predicate
-- `cli/` — Clap-based CLI commands
-
-## Requirements
-
-`REQUIREMENTS.md` contains the formal specification. Update it along with the `README.md` whenever implementing or changing features.
diff --git a/Cargo.lock b/Cargo.lock
deleted file mode 100644
index 8a02cea..0000000
--- a/Cargo.lock
+++ /dev/null
@@ -1,1334 +0,0 @@
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diff --git a/Cargo.toml b/Cargo.toml
deleted file mode 100644
index 18a4b86..0000000
--- a/Cargo.toml
+++ /dev/null
@@ -1,40 +0,0 @@
-[package]
-name = "streamd"
-version = "0.1.0"
-edition = "2021"
-description = "Personal knowledge management and time-tracking CLI using @Tag annotations"
-license = "AGPL-3.0-only"
-authors = ["Konstantin Fickel"]
-repository = "https://github.com/konstantinfickel/streamd"
-
-[dependencies]
-clap = { version = "4", features = ["derive", "env"] }
-clap_complete = "4"
-serde = { version = "1", features = ["derive"] }
-toml = "0.9"
-thiserror = "2"
-miette = { version = "7", features = ["fancy"] }
-pulldown-cmark = "0.13"
-regex = "1"
-once_cell = "1"
-chrono = { version = "0.4", features = ["serde"] }
-walkdir = "2"
-indexmap = { version = "2", features = ["serde"] }
-itertools = "0.14"
-directories = "5"
-
-[dev-dependencies]
-pretty_assertions = "=1.4.1"
-tempfile = "=3.27.0"
-
-[[bin]]
-name = "streamd"
-path = "src/main.rs"
-
-[lib]
-name = "streamd"
-path = "src/lib.rs"
-
-[profile.release]
-lto = true
-strip = true
diff --git a/README.md b/README.md
index 474663c..2fcf603 100644
--- a/README.md
+++ b/README.md
@@ -1,36 +1,7 @@
-# strea.md
+# streamer
 
-![The Strea.md-Logo: A tag on an endless paper roll](./streamd.svg)
+Searching for `@tags` in time-based [streams](https://www.cs.yale.edu/homes/freeman/lifestreams.html).
 
-Strea.md is a personal knowledge management and time-tracking CLI tool. It organizes time-ordered markdown files using `@tag` annotations, letting you manage tasks, track time, and query your notes from the terminal.
+# Usage
 
-## Core Concepts
-
-- **Shards** — Sections of markdown files, organized hierarchically by headings. Each shard can contain markers, tags, and nested child shards.
-- **Markers** — Special `@tags` like `@Task`, `@Done`, `@Waiting`, or `@Timesheet` that give shards semantic meaning and place them into dimensions.
-- **Dimensions** — Classification axes (e.g. task state, project, timesheet) that categorize shards. Some dimensions propagate to child shards.
-
-## File Format
-
-Markdown files are named with a timestamp: `YYYYMMDD-HHMMSS [markers].md`
-
-For example: `20260131-210000 Task Streamd.md`
-
-Within files, `@`-prefixed markers at the beginning of paragraphs or headings define how a shard is categorized.
-
-## Commands
-
-- `streamd` / `streamd new` — Create a new timestamped markdown entry, opening your editor
-- `streamd todo` — Show all open tasks (shards with `@Task` markers)
-- `streamd edit [number]` — Edit a stream file by index (most recent first)
-- `streamd timesheet` — Generate time reports from `@Timesheet` markers
-
-## Configuration
-
-Streamd reads its configuration from `~/.config/streamd/config.toml` (XDG standard). The main setting is `base_folder`, which points to the directory containing your stream files (defaults to the current working directory).
-
-## Usage
-
-Running `streamd` opens your editor to create a new entry. After saving, the file is renamed based on its timestamp and any markers found in the content.
-
-Running `streamd todo` finds all shards marked as open tasks and displays them as rich-formatted panels in your terminal.
+Running `streamer` finds all lines with @Task
\ No newline at end of file
diff --git a/REQUIREMENTS.md b/REQUIREMENTS.md
deleted file mode 100644
index 2ba44bd..0000000
--- a/REQUIREMENTS.md
+++ /dev/null
@@ -1,375 +0,0 @@
-# Streamd Requirements
-
-Streamd (stylized as "Strea.md") is a personal knowledge management and time-tracking CLI tool that organizes time-ordered markdown files using `@Tag` annotations.
-
-## Core Concepts
-
-### Shard
-
-A **Shard** is the fundamental unit of content. It represents a section of a markdown file (paragraph, heading, list item) that can contain markers and tags.
-
-```
-Shard {
-    markers: [String]       // @Tag annotations at START of content
-    tags: [String]          // @Tag annotations AFTER content begins
-    start_line: int
-    end_line: int
-    children: [Shard]       // Nested shards (hierarchical)
-}
-```
-
-### LocalizedShard
-
-A **LocalizedShard** extends Shard with temporal and dimensional placement information.
-
-```
-LocalizedShard {
-    markers: [String]
-    tags: [String]
-    start_line: int
-    end_line: int
-    moment: DateTime        // When this entry was created
-    location: Map<String, String>  // Dimension placements
-    children: [LocalizedShard]
-}
-```
-
----
-
-## Tag Extraction Logic
-
-### R1: Tag Recognition Pattern
-
-Tags are recognized by the regex pattern: `@([^\s*\x60~\[\]]+)`
-
-A tag is `@` followed by word characters, excluding:
-- Whitespace
-- Asterisks `*`
-- Backticks `` ` ``
-- Tildes `~`
-- Brackets `[]`
-
-**Examples of valid tags:**
-- `@Task`, `@Done`, `@Waiting`
-- `@Timesheet`, `@Break`
-- `@ProjectName`, `@Client-ABC`
-
-### R2: Marker vs Tag Distinction
-
-The extraction MUST distinguish between **markers** and **tags** based on their position within a block:
-
-| Type | Position | Purpose |
-|------|----------|---------|
-| **Marker** | Before any non-whitespace content | Semantic classification (triggers shard creation) |
-| **Tag** | After non-whitespace content | Metadata annotation (does not trigger shard creation) |
-
-**Example:**
-```markdown
-@Task @Streamd Working on feature    <!-- @Task and @Streamd are MARKERS -->
-Some text here @CompletedFeature     <!-- @CompletedFeature is a TAG -->
-```
-
-### R3: Marker Boundary Tracking
-
-The extraction algorithm MUST track a "marker boundary" state:
-
-1. Start with `marker_boundary_encountered = false`
-2. While processing tokens:
-   - If whitespace-only: continue (boundary not crossed)
-   - If `@Tag` token found AND boundary NOT crossed: add to markers
-   - If `@Tag` token found AND boundary crossed: add to tags
-   - If any non-whitespace content found: set boundary = crossed
-
-### R4: Nested Token Handling
-
-Tag extraction MUST handle nested markdown formatting:
-
-- Emphasis: `*@Tag*` or `_@Tag_`
-- Strong: `**@Tag**` or `__@Tag__`
-- Strikethrough: `~~@Tag~~`
-- Links: `[@Tag](url)`
-
-Tags inside these formatting elements are still valid and should be extracted.
-
-### R5: Applicable Block Types
-
-Tag extraction applies to:
-- Headings (`# Heading with @Tag`)
-- Paragraphs (`@Tag in paragraph`)
-- Quoute Blocks (`> @Tag in Quote`)
-- List items (each item can have its own markers)
-
----
-
-## Parsing Logic
-
-### R6: Heading-Based Hierarchy
-
-The parser MUST create a hierarchical shard structure based on markdown headings.
-
-**Algorithm for determining split level:**
-
-1. Find the minimum heading level that either:
-   - Appears 2+ times in the block list, OR
-   - Has markers AND is not the first heading
-2. If no such level exists, do not split (return None)
-
-**Example:**
-```markdown
-# Main Title
-Content here
-
-## Section A        <!-- Split point (level 2 appears twice) -->
-Section A content
-
-## Section B        <!-- Split point -->
-Section B content
-```
-
-### R7: List Item Shard Creation
-
-Each list item with markers MUST become its own shard:
-
-```markdown
-- @Task Item one    <!-- Shard 1 -->
-- @Task Item two    <!-- Shard 2 -->
-- Item three        <!-- NOT a separate shard (no markers) -->
-```
-
-### R8: Shard Simplification
-
-When building shards, apply this optimization:
-- If a shard has exactly 1 child AND no markers AND no tags
-- Return the child directly instead of wrapping it
-
----
-
-## Dimension Placement Logic
-
-### R9: Dimension Configuration
-
-A **Dimension** defines a classification axis:
-
-```
-Dimension {
-    display_name: String    // For UI display
-    comment: String?        // Documentation
-    propagate: bool         // Whether children inherit this dimension
-}
-```
-
-### R10: Marker Configuration
-
-A **Marker** defines how a tag affects dimension placement:
-
-```
-Marker {
-    display_name: String
-    placements: [MarkerPlacement]
-}
-
-MarkerPlacement {
-    if_with: Set<String>    // Conditional: only apply if ALL these markers present
-    dimension: String       // Target dimension name
-    value: String?          // Value to assign (defaults to marker name)
-    overwrites: bool        // Can overwrite existing placement
-}
-```
-
-### R11: Conditional Placement
-
-Placements with `if_with` conditions MUST only apply when ALL specified markers are present on the same shard.
-
-**Example Configuration:**
-```
-Marker "Task" {
-    placements: [
-        { dimension: "task", value: "open" },
-        { if_with: ["Done"], dimension: "task", value: "done" },
-        { if_with: ["Waiting"], dimension: "task", value: "waiting" },
-    ]
-}
-```
-
-**Behavior:**
-- `@Task` alone → `task: "open"`
-- `@Task @Done` → `task: "done"` (conditional overrides default)
-- `@Task @Waiting` → `task: "waiting"`
-
-### R12: Localization Algorithm
-
-The localization process MUST follow this algorithm:
-
-```
-function localize_shard(shard, config, propagated_from_parent, moment):
-    position = copy(propagated_from_parent)  // Start with inherited
-    private_position = {}                     // Non-propagating dimensions
-
-    for marker in shard.markers:
-        if marker in config.markers:
-            for placement in marker.placements:
-                // Check conditional
-                if placement.if_with is subset of shard.markers:
-                    dimension = config.dimensions[placement.dimension]
-                    value = placement.value OR marker
-
-                    // Check if we can apply this placement
-                    target = dimension.propagate ? position : private_position
-                    if placement.dimension not in target OR placement.overwrites:
-                        target[placement.dimension] = value
-
-    // Recursively localize children with propagating dimensions
-    children = [
-        localize_shard(child, config, position, moment)
-        for child in shard.children
-    ]
-
-    // Merge private dimensions into final position
-    position.update(private_position)
-
-    return LocalizedShard(
-        markers: shard.markers,
-        tags: shard.tags,
-        location: position,
-        moment: moment,
-        children: children,
-    )
-```
-
-### R13: Dimension Propagation
-
-When `propagate = true`:
-- Children inherit the dimension value from their parent
-- Child can override with their own placement
-
-When `propagate = false`:
-- Dimension value is NOT inherited by children
-- Each shard must have its own marker to be placed in this dimension
-
-**Example:**
-```
-dimensions: {
-    "project": { propagate: true },   // Children inherit project
-    "task": { propagate: false },     // Each task is independent
-}
-```
-
-```markdown
-# @Project-X
-## @Task Item A     <!-- project: "Project-X", task: "open" -->
-### Sub-item        <!-- project: "Project-X", task: (none) -->
-## @Task Item B     <!-- project: "Project-X", task: "open" -->
-```
-
-### R14: Overwrite Behavior
-
-Default: A placement does NOT overwrite an existing value in the dimension.
-
-With `overwrites: true`: The placement WILL replace any existing value.
-
-This allows conditional placements to override base placements.
-
----
-
-## File Naming Convention
-
-### R15: File Name Format
-
-Files follow the pattern: `YYYYMMDD-HHMMSS [markers].md`
-
-- `YYYYMMDD`: Date (8 digits, required)
-- `HHMMSS`: Time (4-6 digits, optional, pads with zeros)
-- `[markers]`: Space-separated marker names extracted from file content
-
-**Extraction regex:** `^(?P<date>\d{8})(?:-(?P<time>\d{4,6}))?.+\.md$`
-
-### R16: Temporal Markers
-
-Special markers can override the file timestamp:
-
-- Date markers: `@YYYYMMDD` (8 digits)
-- Time markers: `@HHMMSS` (6 digits)
-
-These are used for entries that reference a different time than when the file was created.
-
----
-
-## Timesheet Module
-
-### R17: Timesheet Point Types
-
-```
-TimesheetPointType {
-    Card,       // Clock in / start work
-    Break,      // Clock out / end work
-    SickLeave,
-    Vacation,
-    Holiday,
-    Undertime,
-}
-```
-
-### R18: Timesheet State Machine
-
-Process timesheet shards chronologically per day:
-
-1. Start state: "on break" (not working)
-2. `Card` marker: Transition to "working", record start time
-3. `Break` marker: Transition to "on break", emit timecard from previous start to now
-4. Special markers (SickLeave, Vacation, etc.): Set day type
-
-**Validation:** The last entry of each day MUST be a `Break` (cannot end day while working).
-
----
-
-## Query System
-
-### R19: Shard Search
-
-Provide recursive search through the shard tree:
-
-- `find_shard(predicate)`: Find all shards matching a predicate function
-- `find_by_position(dimension, value)`: Find shards where `location[dimension] == value`
-- `find_by_set_dimension(dimension)`: Find shards where dimension exists in location
-
----
-
-## CLI Commands
-
-### R20: Core Commands
-
-| Command | Description |
-|---------|-------------|
-| `streamd new` | Create new timestamped file, open editor, rename with markers on close |
-| `streamd todo` | List all shards with `task: "open"` |
-| `streamd edit [n]` | Edit nth file (supports negative indexing for recent files) |
-| `streamd timesheet` | Extract and export timesheet data as CSV |
-| `streamd completions <shell>` | Generate shell completions (bash, zsh, fish, elvish, powershell) |
-
----
-
-## Application Configuration
-
-### R22: Config File Location
-
-The application configuration is stored at `~/.config/streamd/config.toml`:
-
-```toml
-base_folder = "/path/to/stream/files"
-```
-
-### R23: Environment Variable Override
-
-The `STREAMD_BASE_FOLDER` environment variable can override the config file setting.
-
----
-
-## Configuration Merging
-
-### R24: Configuration Composition
-
-Multiple configurations can be merged:
-
-- Dimensions are combined (later configs can add new dimensions)
-- Markers are combined (later configs can add new markers)
-- This allows base configuration + domain-specific extensions
diff --git a/flake.lock b/flake.lock
index 7d62745..0f2727f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,120 +1,95 @@
 {
   "nodes": {
-    "crane": {
-      "locked": {
-        "lastModified": 1774313767,
-        "narHash": "sha256-hy0XTQND6avzGEUFrJtYBBpFa/POiiaGBr2vpU6Y9tY=",
-        "owner": "ipetkov",
-        "repo": "crane",
-        "rev": "3d9df76e29656c679c744968b17fbaf28f0e923d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ipetkov",
-        "repo": "crane",
-        "type": "github"
-      }
-    },
-    "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1767039857,
-        "narHash": "sha256-vNpUSpF5Nuw8xvDLj2KCwwksIbjua2LZCqhV1LNRDns=",
-        "owner": "NixOS",
-        "repo": "flake-compat",
-        "rev": "5edf11c44bc78a0d334f6334cdaf7d60d732daab",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
-    "git-hooks": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "gitignore": "gitignore",
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1774861927,
-        "narHash": "sha256-FB1fbeJQjaTMI2JFAa0LNMaYXiShiYbJA6puGQC4xdg=",
-        "owner": "cachix",
-        "repo": "git-hooks.nix",
-        "rev": "9c4469b68b62e122c3b3d2ab0ed3caeb04ff1ac4",
-        "type": "github"
-      },
-      "original": {
-        "owner": "cachix",
-        "repo": "git-hooks.nix",
-        "type": "github"
-      }
-    },
-    "gitignore": {
-      "inputs": {
-        "nixpkgs": [
-          "git-hooks",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1709087332,
-        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1774709303,
-        "narHash": "sha256-D3Q07BbIA2KnTcSXIqqu9P586uWxN74zNoCH3h2ESHg=",
-        "owner": "nixos",
+        "lastModified": 1769789167,
+        "narHash": "sha256-kKB3bqYJU5nzYeIROI82Ef9VtTbu4uA3YydSk/Bioa8=",
+        "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "8110df5ad7abf5d4c0f6fb0f8f978390e77f9685",
+        "rev": "62c8382960464ceb98ea593cb8321a2cf8f9e3e5",
         "type": "github"
       },
       "original": {
-        "owner": "nixos",
+        "owner": "NixOS",
         "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
-    "root": {
+    "pyproject-build-systems": {
       "inputs": {
-        "crane": "crane",
-        "git-hooks": "git-hooks",
-        "nixpkgs": "nixpkgs",
-        "rust-overlay": "rust-overlay"
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "pyproject-nix": [
+          "pyproject-nix"
+        ],
+        "uv2nix": [
+          "uv2nix"
+        ]
+      },
+      "locked": {
+        "lastModified": 1763662255,
+        "narHash": "sha256-4bocaOyLa3AfiS8KrWjZQYu+IAta05u3gYZzZ6zXbT0=",
+        "owner": "pyproject-nix",
+        "repo": "build-system-pkgs",
+        "rev": "042904167604c681a090c07eb6967b4dd4dae88c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "build-system-pkgs",
+        "type": "github"
       }
     },
-    "rust-overlay": {
+    "pyproject-nix": {
       "inputs": {
         "nixpkgs": [
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1774840424,
-        "narHash": "sha256-3Oi4mBKzOCFQYLUyEjyc0s5cnlNj1MzmhpVKoLptpe8=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "d9f52b51548e76ab8b6e7d647763047ebdec835c",
+        "lastModified": 1769936401,
+        "narHash": "sha256-kwCOegKLZJM9v/e/7cqwg1p/YjjTAukKPqmxKnAZRgA=",
+        "owner": "pyproject-nix",
+        "repo": "pyproject.nix",
+        "rev": "b0d513eeeebed6d45b4f2e874f9afba2021f7812",
         "type": "github"
       },
       "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
+        "owner": "pyproject-nix",
+        "repo": "pyproject.nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "pyproject-build-systems": "pyproject-build-systems",
+        "pyproject-nix": "pyproject-nix",
+        "uv2nix": "uv2nix"
+      }
+    },
+    "uv2nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "pyproject-nix": [
+          "pyproject-nix"
+        ]
+      },
+      "locked": {
+        "lastModified": 1769957392,
+        "narHash": "sha256-6PkqwwYf5K2CHi2V+faI/9pqjfz/HxUkI/MVid6hlOY=",
+        "owner": "pyproject-nix",
+        "repo": "uv2nix",
+        "rev": "d18bc50ae1c3d4be9c41c2d94ea765524400af75",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "uv2nix",
         "type": "github"
       }
     }
diff --git a/flake.nix b/flake.nix
index d0c3479..669701a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,18 +1,24 @@
 {
-  description = "Using Markdown Files to organize your life as a @Tag-Stream";
+  description = "Hello world flake using uv2nix";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
-    rust-overlay = {
-      url = "github:oxalica/rust-overlay";
+    pyproject-nix = {
+      url = "github:pyproject-nix/pyproject.nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
-    crane.url = "github:ipetkov/crane";
+    uv2nix = {
+      url = "github:pyproject-nix/uv2nix";
+      inputs.pyproject-nix.follows = "pyproject-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
 
-    git-hooks = {
-      url = "github:cachix/git-hooks.nix";
+    pyproject-build-systems = {
+      url = "github:pyproject-nix/build-system-pkgs";
+      inputs.pyproject-nix.follows = "pyproject-nix";
+      inputs.uv2nix.follows = "uv2nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
@@ -21,186 +27,198 @@
     {
       self,
       nixpkgs,
-      rust-overlay,
-      crane,
-      git-hooks,
+      uv2nix,
+      pyproject-nix,
+      pyproject-build-systems,
       ...
     }:
     let
       inherit (nixpkgs) lib;
-      forAllSystems = lib.genAttrs lib.systems.flakeExposed;
 
-      mkPkgs =
-        system:
-        import nixpkgs {
-          inherit system;
-          overlays = [ rust-overlay.overlays.default ];
-        };
+      # Load a uv workspace from a workspace root.
+      # Uv2nix treats all uv projects as workspace projects.
+      workspace = uv2nix.lib.workspace.loadWorkspace { workspaceRoot = ./.; };
 
-      mkCraneLib =
-        system:
-        let
-          pkgs = mkPkgs system;
-          toolchain = pkgs.rust-bin.stable.latest.default.override {
-            extensions = [
-              "rust-src"
-              "rust-analyzer"
-            ];
-          };
-        in
-        (crane.mkLib pkgs).overrideToolchain toolchain;
+      # Create package overlay from workspace.
+      overlay = workspace.mkPyprojectOverlay {
+        # Prefer prebuilt binary wheels as a package source.
+        # Sdists are less likely to "just work" because of the metadata missing from uv.lock.
+        # Binary wheels are more likely to, but may still require overrides for library dependencies.
+        sourcePreference = "wheel"; # or sourcePreference = "sdist";
+        # Optionally customise PEP 508 environment
+        # environ = {
+        #   platform_release = "5.10.65";
+        # };
+      };
 
-      mkStreamd =
-        system:
-        let
-          craneLib = mkCraneLib system;
+      # Extend generated overlay with build fixups
+      #
+      # Uv2nix can only work with what it has, and uv.lock is missing essential metadata to perform some builds.
+      # This is an additional overlay implementing build fixups.
+      # See:
+      # - https://pyproject-nix.github.io/uv2nix/FAQ.html
+      pyprojectOverrides = _final: _prev: {
+        # Implement build fixups here.
+        # Note that uv2nix is _not_ using Nixpkgs buildPythonPackage.
+        # It's using https://pyproject-nix.github.io/pyproject.nix/build.html
+      };
 
-          commonArgs = {
-            src = craneLib.path ./.;
-            pname = "streamd";
-            version = "0.1.0";
-            strictDeps = true;
-          };
+      # This example is only using x86_64-linux
+      pkgs = nixpkgs.legacyPackages.x86_64-linux;
 
-          cargoArtifacts = craneLib.buildDepsOnly commonArgs;
-        in
-        craneLib.buildPackage (
-          commonArgs
-          // {
-            inherit cargoArtifacts;
+      # Use Python 3.14 from nixpkgs
+      python = pkgs.python314;
 
-            passthru = {
-              inherit cargoArtifacts;
-              tests = {
-                clippy = craneLib.cargoClippy (
-                  commonArgs
-                  // {
-                    inherit cargoArtifacts;
-                    cargoClippyExtraArgs = "--all-targets -- -D warnings";
-                  }
-                );
-                fmt = craneLib.cargoFmt { src = commonArgs.src; };
-                test = craneLib.cargoTest (commonArgs // { inherit cargoArtifacts; });
-              };
-            };
-          }
-        );
+      # Construct package set
+      pythonSet =
+        # Use base package set from pyproject.nix builders
+        (pkgs.callPackage pyproject-nix.build.packages {
+          inherit python;
+        }).overrideScope
+          (
+            lib.composeManyExtensions [
+              pyproject-build-systems.overlays.default
+              overlay
+              pyprojectOverrides
+            ]
+          );
 
-      mkGitHooksCheck =
-        system:
-        let
-          pkgs = mkPkgs system;
-          toolchain = pkgs.rust-bin.stable.latest.default;
-        in
-        git-hooks.lib.${system}.run {
-          src = ./.;
-          hooks = {
-            rustfmt = {
-              enable = true;
-              package = toolchain;
-            };
-            commitizen.enable = true;
-          };
-        };
     in
     {
-      packages = forAllSystems (
-        system:
+      # Package a virtual environment as our main application.
+      #
+      # Enable no optional dependencies for production build.
+      packages.x86_64-linux =
         let
-          streamd = mkStreamd system;
+          streamer = pythonSet.mkVirtualEnv "streamer-env" workspace.deps.default;
         in
         {
-          inherit streamd;
-          default = streamd;
-        }
-      );
-
-      homeManagerModules.default =
-        {
-          lib,
-          config,
-          pkgs,
-          ...
-        }:
-        let
-          cfg = config.programs.streamd;
-        in
-        {
-          options.programs.streamd = {
-            enable = lib.mkEnableOption "streamd";
-
-            base-folder = lib.mkOption {
-              type = lib.types.str;
-              description = "Base Folder of streamd";
-            };
-
-            package = lib.mkOption {
-              type = lib.types.package;
-              default = self.packages.${pkgs.stdenv.hostPlatform.system}.streamd;
-              defaultText = lib.literalExpression "inputs.streamd.packages.\${pkgs.stdenv.hostPlatform.system}.streamd";
-              description = "The package to use for the streamd binary.";
-            };
-          };
-
-          config = lib.mkIf cfg.enable {
-            assertions = [
-              (lib.hm.assertions.assertPlatform "programs.streamd" pkgs lib.platforms.linux)
-            ];
-
-            home.packages = [ cfg.package ];
-
-            xdg.configFile."streamd/config.toml".source =
-              (pkgs.formats.toml { }).generate "streamd-configuration"
-                {
-                  base_folder = cfg.base-folder;
-                };
-
-            home.shellAliases.s = "streamd";
-
-            programs.bash.initExtra = ''
-              eval "$(${cfg.package}/bin/streamd completions bash)"
-            '';
-
-            programs.zsh.initExtra = ''
-              eval "$(${cfg.package}/bin/streamd completions zsh)"
-            '';
-          };
+          inherit streamer;
+          default = streamer;
         };
 
-      checks = forAllSystems (
-        system:
-        let
-          streamd = mkStreamd system;
-        in
-        {
-          inherit (streamd.passthru.tests) clippy fmt test;
-          pre-commit = mkGitHooksCheck system;
-        }
-      );
+      # Make streamer runnable with `nix run`
+      apps.x86_64-linux = {
+        default = {
+          type = "app";
+          program = "${self.packages.x86_64-linux.default}/bin/streamer";
+        };
+      };
 
-      devShells = forAllSystems (
-        system:
-        let
-          pkgs = mkPkgs system;
-          toolchain = pkgs.rust-bin.stable.latest.default.override {
-            extensions = [
-              "rust-src"
-              "rust-analyzer"
-            ];
+      # This example provides two different modes of development:
+      # - Impurely using uv to manage virtual environments
+      # - Pure development using uv2nix to manage virtual environments
+      devShells.x86_64-linux = {
+        # It is of course perfectly OK to keep using an impure virtualenv workflow and only use uv2nix to build packages.
+        # This devShell simply adds Python and undoes the dependency leakage done by Nixpkgs Python infrastructure.
+        impure = pkgs.mkShell {
+          packages = with pkgs; [
+            python
+            uv
+            pre-commit
+            bashInteractive
+          ];
+          env = {
+            # Prevent uv from managing Python downloads
+            UV_PYTHON_DOWNLOADS = "never";
+            # Force uv to use nixpkgs Python interpreter
+            UV_PYTHON = python.interpreter;
+          }
+          // lib.optionalAttrs pkgs.stdenv.isLinux {
+            # Python libraries often load native shared objects using dlopen(3).
+            # Setting LD_LIBRARY_PATH makes the dynamic library loader aware of libraries without using RPATH for lookup.
+            LD_LIBRARY_PATH = lib.makeLibraryPath pkgs.pythonManylinuxPackages.manylinux1;
           };
-        in
-        {
-          default = pkgs.mkShell {
-            packages = [
-              toolchain
-              pkgs.commitizen
+          shellHook = ''
+            unset PYTHONPATH
+          '';
+        };
+
+        # This devShell uses uv2nix to construct a virtual environment purely from Nix, using the same dependency specification as the application.
+        # The notable difference is that we also apply another overlay here enabling editable mode ( https://setuptools.pypa.io/en/latest/userguide/development_mode.html ).
+        #
+        # This means that any changes done to your local files do not require a rebuild.
+        #
+        # Note: Editable package support is still unstable and subject to change.
+        uv2nix =
+          let
+            # Create an overlay enabling editable mode for all local dependencies.
+            editableOverlay = workspace.mkEditablePyprojectOverlay {
+              # Use environment variable
+              root = "$REPO_ROOT";
+              # Optional: Only enable editable for these packages
+              # members = [ "streamer" ];
+            };
+
+            # Override previous set with our overrideable overlay.
+            editablePythonSet = pythonSet.overrideScope (
+              lib.composeManyExtensions [
+                editableOverlay
+
+                # Apply fixups for building an editable package of your workspace packages
+                (final: prev: {
+                  streamer = prev.streamer.overrideAttrs (old: {
+                    # It's a good idea to filter the sources going into an editable build
+                    # so the editable package doesn't have to be rebuilt on every change.
+                    src = lib.fileset.toSource {
+                      root = old.src;
+                      fileset = lib.fileset.unions [
+                        (old.src + "/pyproject.toml")
+                        (old.src + "/README.md")
+                        (old.src + "/src/streamer/__init__.py")
+                      ];
+                    };
+
+                    # Hatchling (our build system) has a dependency on the `editables` package when building editables.
+                    #
+                    # In normal Python flows this dependency is dynamically handled, and doesn't need to be explicitly declared.
+                    # This behaviour is documented in PEP-660.
+                    #
+                    # With Nix the dependency needs to be explicitly declared.
+                    nativeBuildInputs =
+                      old.nativeBuildInputs
+                      ++ final.resolveBuildSystem {
+                        editables = [ ];
+                      };
+                  });
+
+                })
+              ]
+            );
+
+            # Build virtual environment, with local packages being editable.
+            #
+            # Enable all optional dependencies for development.
+            virtualenv = editablePythonSet.mkVirtualEnv "streamer-dev-env" workspace.deps.all;
+
+          in
+          pkgs.mkShell {
+            packages = with pkgs; [
+              virtualenv
+              uv
+              pre-commit
+              bashInteractive
             ];
 
+            env = {
+              # Don't create venv using uv
+              UV_NO_SYNC = "1";
+
+              # Force uv to use Python interpreter from venv
+              UV_PYTHON = "${virtualenv}/bin/python";
+
+              # Prevent uv from downloading managed Python's
+              UV_PYTHON_DOWNLOADS = "never";
+            };
+
             shellHook = ''
-              ${(mkGitHooksCheck system).shellHook}
+              # Undo dependency propagation by nixpkgs.
+              unset PYTHONPATH
+
+              # Get repository root using git. This is expanded at runtime by the editable `.pth` machinery.
+              export REPO_ROOT=$(git rev-parse --show-toplevel)
             '';
           };
-        }
-      );
+      };
     };
 }
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..a58de8c
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,30 @@
+[project]
+name = "streamer"
+version = "0.1.0"
+description = "Searching for tags in streams"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "click==8.3.1",
+    "mistletoe==1.5.1",
+    "pydantic==2.12.5",
+    "pydantic-settings[yaml]==2.12.0",
+    "rich==14.3.2",
+    "typer==0.21.2",
+    "xdg-base-dirs==6.0.2",
+]
+
+[project.scripts]
+streamer = "streamer:app"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[dependency-groups]
+dev = [
+    "faker==40.4.0",
+    "pyright==1.1.408",
+    "pytest==9.0.2",
+    "ruff==0.15.0",
+]
diff --git a/src/cli/args.rs b/src/cli/args.rs
deleted file mode 100644
index cb2c504..0000000
--- a/src/cli/args.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-use clap::{Parser, Subcommand};
-use clap_complete::Shell;
-
-#[derive(Parser)]
-#[command(name = "streamd")]
-#[command(
-    author,
-    version,
-    about = "Personal knowledge management and time-tracking CLI using @Tag annotations"
-)]
-pub struct Cli {
-    #[command(subcommand)]
-    pub command: Option<Commands>,
-}
-
-#[derive(Subcommand)]
-pub enum Commands {
-    /// Create a new stream file
-    New,
-
-    /// Display open tasks
-    Todo,
-
-    /// Edit a stream file by position
-    Edit {
-        /// Position of the file to edit (0 = most recent, negative = from oldest)
-        #[arg(default_value = "1")]
-        number: i32,
-    },
-
-    /// Display extracted timesheets
-    Timesheet,
-
-    /// Generate shell completions
-    Completions {
-        /// Shell to generate completions for
-        #[arg(value_enum)]
-        shell: Shell,
-    },
-}
diff --git a/src/cli/commands/completions.rs b/src/cli/commands/completions.rs
deleted file mode 100644
index c9c93fc..0000000
--- a/src/cli/commands/completions.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-use clap::CommandFactory;
-use clap_complete::{generate, Shell};
-use std::io;
-
-use crate::cli::Cli;
-
-pub fn run(shell: Shell) {
-    let mut cmd = Cli::command();
-    let name = cmd.get_name().to_string();
-    generate(shell, &mut cmd, name, &mut io::stdout());
-}
diff --git a/src/cli/commands/edit.rs b/src/cli/commands/edit.rs
deleted file mode 100644
index 89a0240..0000000
--- a/src/cli/commands/edit.rs
+++ /dev/null
@@ -1,73 +0,0 @@
-use std::fs;
-use std::process::Command;
-
-use walkdir::WalkDir;
-
-use crate::config::Settings;
-use crate::error::StreamdError;
-use crate::extract::parse_markdown_file;
-use crate::localize::{localize_stream_file, TaskConfiguration};
-use crate::models::LocalizedShard;
-
-fn all_files() -> Result<Vec<LocalizedShard>, StreamdError> {
-    let settings = Settings::load()?;
-    let mut shards = Vec::new();
-
-    for entry in WalkDir::new(&settings.base_folder)
-        .max_depth(1)
-        .into_iter()
-        .filter_map(|e| e.ok())
-    {
-        let path = entry.path();
-        if path.extension().map(|e| e == "md").unwrap_or(false) {
-            let file_name = path.to_string_lossy().to_string();
-            let content = fs::read_to_string(path)?;
-            let stream_file = parse_markdown_file(&file_name, &content);
-
-            if let Ok(shard) = localize_stream_file(&stream_file, &TaskConfiguration) {
-                shards.push(shard);
-            }
-        }
-    }
-
-    Ok(shards)
-}
-
-pub fn run(number: i32) -> Result<(), StreamdError> {
-    let all_shards = all_files()?;
-
-    // Sort by moment (timestamp)
-    let mut sorted_shards = all_shards;
-    sorted_shards.sort_by_key(|s| s.moment);
-
-    if sorted_shards.is_empty() {
-        return Err(StreamdError::ConfigError("No files found".to_string()));
-    }
-
-    let selected_index = if number >= 0 {
-        // 0 = most recent, 1 = second most recent, etc.
-        let idx = sorted_shards.len() as i32 - number;
-        if idx < 0 {
-            return Err(StreamdError::ConfigError(
-                "Argument out of range".to_string(),
-            ));
-        }
-        idx as usize
-    } else {
-        // -1 = oldest, -2 = second oldest, etc.
-        let idx = (-number - 1) as usize;
-        if idx >= sorted_shards.len() {
-            return Err(StreamdError::ConfigError(
-                "Argument out of range".to_string(),
-            ));
-        }
-        idx
-    };
-
-    if let Some(file_path) = sorted_shards[selected_index].location.get("file") {
-        let editor = std::env::var("EDITOR").unwrap_or_else(|_| "vi".to_string());
-        Command::new(&editor).arg(file_path).status()?;
-    }
-
-    Ok(())
-}
diff --git a/src/cli/commands/mod.rs b/src/cli/commands/mod.rs
deleted file mode 100644
index d5f79ce..0000000
--- a/src/cli/commands/mod.rs
+++ /dev/null
@@ -1,5 +0,0 @@
-pub mod completions;
-pub mod edit;
-pub mod new;
-pub mod timesheet;
-pub mod todo;
diff --git a/src/cli/commands/new.rs b/src/cli/commands/new.rs
deleted file mode 100644
index de7d351..0000000
--- a/src/cli/commands/new.rs
+++ /dev/null
@@ -1,60 +0,0 @@
-use std::fs;
-use std::io::Write;
-use std::path::Path;
-use std::process::Command;
-
-use chrono::Local;
-
-use crate::config::Settings;
-use crate::error::StreamdError;
-use crate::extract::parse_markdown_file;
-
-pub fn run() -> Result<(), StreamdError> {
-    let settings = Settings::load()?;
-    let streamd_directory = &settings.base_folder;
-
-    let timestamp = Local::now().format("%Y%m%d-%H%M%S").to_string();
-    let preliminary_file_name = format!("{}_wip.md", timestamp);
-    let preliminary_path = Path::new(streamd_directory).join(&preliminary_file_name);
-
-    // Create initial file with heading
-    let content = "# ";
-    let mut file = fs::File::create(&preliminary_path)?;
-    file.write_all(content.as_bytes())?;
-    drop(file);
-
-    // Open in editor
-    let editor = std::env::var("EDITOR").unwrap_or_else(|_| "vi".to_string());
-    let status = Command::new(&editor).arg(&preliminary_path).status()?;
-
-    if !status.success() {
-        return Err(StreamdError::IoError(std::io::Error::other(
-            "Editor exited with non-zero status",
-        )));
-    }
-
-    // Read the edited content
-    let edited_content = fs::read_to_string(&preliminary_path)?;
-    let parsed_content =
-        parse_markdown_file(preliminary_path.to_string_lossy().as_ref(), &edited_content);
-
-    // Determine final filename based on markers
-    let final_file_name = if let Some(ref shard) = parsed_content.shard {
-        if !shard.markers.is_empty() {
-            format!("{} {}.md", timestamp, shard.markers.join(" "))
-        } else {
-            format!("{}.md", timestamp)
-        }
-    } else {
-        format!("{}.md", timestamp)
-    };
-
-    let final_path = Path::new(streamd_directory).join(&final_file_name);
-
-    // Rename the file
-    fs::rename(&preliminary_path, &final_path)?;
-
-    println!("Saved as {}", final_file_name);
-
-    Ok(())
-}
diff --git a/src/cli/commands/timesheet.rs b/src/cli/commands/timesheet.rs
deleted file mode 100644
index f727edc..0000000
--- a/src/cli/commands/timesheet.rs
+++ /dev/null
@@ -1,52 +0,0 @@
-use std::fs;
-
-use walkdir::WalkDir;
-
-use crate::config::Settings;
-use crate::error::StreamdError;
-use crate::extract::parse_markdown_file;
-use crate::localize::localize_stream_file;
-use crate::models::LocalizedShard;
-use crate::timesheet::{extract_timesheets, BasicTimesheetConfiguration};
-
-fn all_files() -> Result<Vec<LocalizedShard>, StreamdError> {
-    let settings = Settings::load()?;
-    let mut shards = Vec::new();
-
-    for entry in WalkDir::new(&settings.base_folder)
-        .max_depth(1)
-        .into_iter()
-        .filter_map(|e| e.ok())
-    {
-        let path = entry.path();
-        if path.extension().map(|e| e == "md").unwrap_or(false) {
-            let file_name = path.to_string_lossy().to_string();
-            let content = fs::read_to_string(path)?;
-            let stream_file = parse_markdown_file(&file_name, &content);
-
-            if let Ok(shard) = localize_stream_file(&stream_file, &BasicTimesheetConfiguration) {
-                shards.push(shard);
-            }
-        }
-    }
-
-    Ok(shards)
-}
-
-pub fn run() -> Result<(), StreamdError> {
-    let all_shards = all_files()?;
-    let mut sheets = extract_timesheets(&all_shards)?;
-    sheets.sort_by_key(|s| s.date);
-
-    for sheet in sheets {
-        println!("{}", sheet.date);
-        let times: Vec<String> = sheet
-            .timecards
-            .iter()
-            .map(|card| format!("{},{}", card.from_time, card.to_time))
-            .collect();
-        println!("{}", times.join(","));
-    }
-
-    Ok(())
-}
diff --git a/src/cli/commands/todo.rs b/src/cli/commands/todo.rs
deleted file mode 100644
index ee5a422..0000000
--- a/src/cli/commands/todo.rs
+++ /dev/null
@@ -1,56 +0,0 @@
-use std::fs;
-
-use walkdir::WalkDir;
-
-use crate::config::Settings;
-use crate::error::StreamdError;
-use crate::extract::parse_markdown_file;
-use crate::localize::{localize_stream_file, TaskConfiguration};
-use crate::models::LocalizedShard;
-use crate::query::find_shard_by_position;
-
-fn all_files() -> Result<Vec<LocalizedShard>, StreamdError> {
-    let settings = Settings::load()?;
-    let mut shards = Vec::new();
-
-    for entry in WalkDir::new(&settings.base_folder)
-        .max_depth(1)
-        .into_iter()
-        .filter_map(|e| e.ok())
-    {
-        let path = entry.path();
-        if path.extension().map(|e| e == "md").unwrap_or(false) {
-            let file_name = path.to_string_lossy().to_string();
-            let content = fs::read_to_string(path)?;
-            let stream_file = parse_markdown_file(&file_name, &content);
-
-            if let Ok(shard) = localize_stream_file(&stream_file, &TaskConfiguration) {
-                shards.push(shard);
-            }
-        }
-    }
-
-    Ok(shards)
-}
-
-pub fn run() -> Result<(), StreamdError> {
-    let all_shards = all_files()?;
-
-    for task_shard in find_shard_by_position(&all_shards, "task", "open") {
-        if let Some(file_path) = task_shard.location.get("file") {
-            let content = fs::read_to_string(file_path)?;
-            let lines: Vec<&str> = content.lines().collect();
-
-            let start = task_shard.start_line.saturating_sub(1);
-            let end = std::cmp::min(task_shard.end_line, lines.len());
-
-            println!("--- {}:{} ---", file_path, task_shard.start_line);
-            for line in &lines[start..end] {
-                println!("{}", line);
-            }
-            println!();
-        }
-    }
-
-    Ok(())
-}
diff --git a/src/cli/mod.rs b/src/cli/mod.rs
deleted file mode 100644
index 6fdae80..0000000
--- a/src/cli/mod.rs
+++ /dev/null
@@ -1,4 +0,0 @@
-pub mod args;
-pub mod commands;
-
-pub use args::{Cli, Commands};
diff --git a/src/config.rs b/src/config.rs
deleted file mode 100644
index c828ba9..0000000
--- a/src/config.rs
+++ /dev/null
@@ -1,44 +0,0 @@
-use directories::ProjectDirs;
-use serde::{Deserialize, Serialize};
-use std::env;
-use std::fs;
-use std::path::PathBuf;
-
-use crate::error::StreamdError;
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct Settings {
-    pub base_folder: String,
-}
-
-impl Default for Settings {
-    fn default() -> Self {
-        Self {
-            base_folder: env::current_dir()
-                .map(|p| p.to_string_lossy().to_string())
-                .unwrap_or_else(|_| ".".to_string()),
-        }
-    }
-}
-
-impl Settings {
-    pub fn load() -> Result<Self, StreamdError> {
-        let config_path = Self::config_path();
-
-        if config_path.exists() {
-            let content = fs::read_to_string(&config_path)?;
-            let settings: Settings = toml::from_str(&content)?;
-            Ok(settings)
-        } else {
-            Ok(Settings::default())
-        }
-    }
-
-    fn config_path() -> PathBuf {
-        if let Some(proj_dirs) = ProjectDirs::from("", "", "streamd") {
-            proj_dirs.config_dir().join("config.toml")
-        } else {
-            PathBuf::from("~/.config/streamd/config.toml")
-        }
-    }
-}
diff --git a/src/error.rs b/src/error.rs
deleted file mode 100644
index c76801c..0000000
--- a/src/error.rs
+++ /dev/null
@@ -1,25 +0,0 @@
-use thiserror::Error;
-
-#[derive(Error, Debug)]
-pub enum StreamdError {
-    #[error("Could not extract date from file name: {0}")]
-    DateExtractionError(String),
-
-    #[error("Timesheet error: {0}")]
-    TimesheetError(String),
-
-    #[error("Configuration error: {0}")]
-    ConfigError(String),
-
-    #[error("IO error: {0}")]
-    IoError(#[from] std::io::Error),
-
-    #[error("TOML error: {0}")]
-    TomlError(#[from] toml::de::Error),
-}
-
-impl From<StreamdError> for miette::Report {
-    fn from(err: StreamdError) -> Self {
-        miette::Report::msg(err.to_string())
-    }
-}
diff --git a/src/extract/mod.rs b/src/extract/mod.rs
deleted file mode 100644
index 0df4bde..0000000
--- a/src/extract/mod.rs
+++ /dev/null
@@ -1,5 +0,0 @@
-mod parser;
-mod tag_extraction;
-
-pub use parser::parse_markdown_file;
-pub use tag_extraction::{extract_markers_and_tags, has_markers};
diff --git a/src/extract/parser.rs b/src/extract/parser.rs
deleted file mode 100644
index 1326371..0000000
--- a/src/extract/parser.rs
+++ /dev/null
@@ -1,739 +0,0 @@
-use std::collections::HashMap;
-
-use pulldown_cmark::{Event, HeadingLevel, Options, Parser, Tag, TagEnd};
-
-use crate::extract::tag_extraction::{extract_markers_and_tags, has_markers};
-use crate::models::{Shard, StreamFile};
-
-/// Information about a block element.
-#[derive(Debug, Clone)]
-struct BlockInfo {
-    start_line: usize,
-    end_line: usize,
-    block_type: BlockType,
-    events: Vec<Event<'static>>,
-}
-
-#[derive(Debug, Clone, PartialEq)]
-enum BlockType {
-    Paragraph,
-    Heading(usize),
-    List,
-    ListItem,
-    CodeBlock,
-    #[allow(dead_code)]
-    Other,
-}
-
-/// Build a shard, applying simplification rules.
-/// If the shard has exactly one child with the same line range and no markers/tags,
-/// return that child instead.
-fn build_shard(
-    start_line: usize,
-    end_line: usize,
-    markers: Vec<String>,
-    tags: Vec<String>,
-    children: Vec<Shard>,
-) -> Shard {
-    if children.len() == 1
-        && tags.is_empty()
-        && markers.is_empty()
-        && children[0].start_line == start_line
-        && children[0].end_line == end_line
-    {
-        return children.into_iter().next().unwrap();
-    }
-
-    Shard {
-        markers,
-        tags,
-        start_line,
-        end_line,
-        children,
-    }
-}
-
-/// Merge shards where the first one becomes the parent with its markers/tags preserved.
-fn merge_into_first_shard(
-    mut shards: Vec<Shard>,
-    start_line: usize,
-    end_line: usize,
-    additional_tags: Vec<String>,
-) -> Shard {
-    if shards.is_empty() {
-        return build_shard(start_line, end_line, vec![], additional_tags, vec![]);
-    }
-
-    let mut first = shards.remove(0);
-    first.start_line = start_line;
-    first.end_line = end_line;
-    first.children = shards;
-    first.tags.extend(additional_tags);
-    first
-}
-
-/// Parse a markdown file into a StreamFile with shard structure.
-pub fn parse_markdown_file(file_name: &str, file_content: &str) -> StreamFile {
-    let line_count = std::cmp::max(file_content.lines().count(), 1);
-    let end_line = line_count;
-
-    // Handle empty file
-    if file_content.is_empty() {
-        return StreamFile {
-            file_name: file_name.to_string(),
-            shard: Some(Shard::new(1, 1)),
-        };
-    }
-
-    // Parse the markdown with offset tracking
-    let mut options = Options::empty();
-    options.insert(Options::ENABLE_STRIKETHROUGH);
-    let parser = Parser::new_ext(file_content, options);
-
-    // Collect blocks with their line information
-    let blocks = collect_blocks(file_content, parser);
-
-    // Parse into shard structure
-    let shard = if blocks.is_empty() {
-        Shard::new(1, end_line)
-    } else {
-        parse_header_shards(&blocks, 1, end_line, false).unwrap_or_else(|| Shard::new(1, end_line))
-    };
-
-    StreamFile {
-        file_name: file_name.to_string(),
-        shard: Some(shard),
-    }
-}
-
-/// Collect block-level elements from the parser.
-fn collect_blocks(content: &str, parser: Parser) -> Vec<BlockInfo> {
-    let mut blocks = Vec::new();
-    let mut current_block: Option<BlockInfo> = None;
-    let _current_events: Vec<Event<'static>> = Vec::new();
-    let mut depth = 0;
-    let mut list_items: Vec<BlockInfo> = Vec::new();
-    let mut in_list = false;
-    let mut list_start_line = 0;
-
-    // Pre-compute line starts for offset-to-line mapping
-    let line_starts: Vec<usize> = std::iter::once(0)
-        .chain(content.match_indices('\n').map(|(i, _)| i + 1))
-        .collect();
-
-    let offset_to_line =
-        |offset: usize| -> usize { line_starts.partition_point(|&start| start <= offset) };
-
-    for (event, range) in parser.into_offset_iter() {
-        let line = offset_to_line(range.start);
-
-        match &event {
-            Event::Start(Tag::Paragraph) => {
-                if depth == 0 {
-                    current_block = Some(BlockInfo {
-                        start_line: line,
-                        end_line: line,
-                        block_type: BlockType::Paragraph,
-                        events: Vec::new(),
-                    });
-                }
-                depth += 1;
-                if let Some(ref mut block) = current_block {
-                    block.events.push(event.clone().into_static());
-                }
-            }
-            Event::End(TagEnd::Paragraph) => {
-                depth -= 1;
-                if let Some(ref mut block) = current_block {
-                    block.events.push(event.clone().into_static());
-                    block.end_line = line;
-                }
-                if depth == 0 {
-                    if let Some(block) = current_block.take() {
-                        if in_list {
-                            list_items.push(block);
-                        } else {
-                            blocks.push(block);
-                        }
-                    }
-                }
-            }
-            Event::Start(Tag::Heading { level, .. }) => {
-                let heading_level = heading_level_to_usize(*level);
-                if depth == 0 {
-                    current_block = Some(BlockInfo {
-                        start_line: line,
-                        end_line: line,
-                        block_type: BlockType::Heading(heading_level),
-                        events: Vec::new(),
-                    });
-                }
-                depth += 1;
-                if let Some(ref mut block) = current_block {
-                    block.events.push(event.clone().into_static());
-                }
-            }
-            Event::End(TagEnd::Heading(_)) => {
-                depth -= 1;
-                if let Some(ref mut block) = current_block {
-                    block.events.push(event.clone().into_static());
-                    block.end_line = line;
-                }
-                if depth == 0 {
-                    if let Some(block) = current_block.take() {
-                        blocks.push(block);
-                    }
-                }
-            }
-            Event::Start(Tag::List(_)) => {
-                if !in_list {
-                    in_list = true;
-                    list_start_line = line;
-                    list_items.clear();
-                }
-                depth += 1;
-            }
-            Event::End(TagEnd::List(_)) => {
-                depth -= 1;
-                if depth == 0 && in_list {
-                    in_list = false;
-                    // Create a list block containing all list items
-                    if !list_items.is_empty() {
-                        blocks.push(BlockInfo {
-                            start_line: list_start_line,
-                            end_line: line,
-                            block_type: BlockType::List,
-                            events: vec![], // List events are handled through list_items
-                        });
-                        // Store list items for later processing
-                        for item in list_items.drain(..) {
-                            blocks.push(BlockInfo {
-                                block_type: BlockType::ListItem,
-                                ..item
-                            });
-                        }
-                    }
-                }
-            }
-            Event::Start(Tag::Item) => {
-                if in_list {
-                    current_block = Some(BlockInfo {
-                        start_line: line,
-                        end_line: line,
-                        block_type: BlockType::ListItem,
-                        events: Vec::new(),
-                    });
-                }
-            }
-            Event::End(TagEnd::Item) => {
-                if let Some(ref mut block) = current_block {
-                    block.end_line = line;
-                }
-                if let Some(block) = current_block.take() {
-                    list_items.push(block);
-                }
-            }
-            Event::Start(Tag::CodeBlock(_)) => {
-                if depth == 0 {
-                    current_block = Some(BlockInfo {
-                        start_line: line,
-                        end_line: line,
-                        block_type: BlockType::CodeBlock,
-                        events: Vec::new(),
-                    });
-                }
-                depth += 1;
-                if let Some(ref mut block) = current_block {
-                    block.events.push(event.clone().into_static());
-                }
-            }
-            Event::End(TagEnd::CodeBlock) => {
-                depth -= 1;
-                if let Some(ref mut block) = current_block {
-                    block.events.push(event.clone().into_static());
-                    block.end_line = line;
-                }
-                if depth == 0 {
-                    if let Some(block) = current_block.take() {
-                        blocks.push(block);
-                    }
-                }
-            }
-            _ => {
-                if let Some(ref mut block) = current_block {
-                    block.events.push(event.clone().into_static());
-                }
-            }
-        }
-    }
-
-    blocks
-}
-
-fn heading_level_to_usize(level: HeadingLevel) -> usize {
-    match level {
-        HeadingLevel::H1 => 1,
-        HeadingLevel::H2 => 2,
-        HeadingLevel::H3 => 3,
-        HeadingLevel::H4 => 4,
-        HeadingLevel::H5 => 5,
-        HeadingLevel::H6 => 6,
-    }
-}
-
-/// Check if a block has markers.
-fn block_has_markers(block: &BlockInfo) -> bool {
-    has_markers(block.events.iter().cloned())
-}
-
-/// Extract markers and tags from a block.
-fn extract_block_markers_and_tags(block: &BlockInfo) -> (Vec<String>, Vec<String>) {
-    extract_markers_and_tags(block.events.iter().cloned())
-}
-
-/// Find positions of paragraph blocks that have markers.
-fn find_paragraph_shard_positions(blocks: &[BlockInfo]) -> Vec<usize> {
-    blocks
-        .iter()
-        .enumerate()
-        .filter(|(_, block)| block.block_type == BlockType::Paragraph && block_has_markers(block))
-        .map(|(i, _)| i)
-        .collect()
-}
-
-/// Find positions of headings at a specific level.
-fn find_headings_by_level(blocks: &[BlockInfo], level: usize) -> Vec<usize> {
-    blocks
-        .iter()
-        .enumerate()
-        .filter(|(_, block)| matches!(block.block_type, BlockType::Heading(l) if l == level))
-        .map(|(i, _)| i)
-        .collect()
-}
-
-/// Calculate the heading level to split on for the next parsing step.
-fn calculate_heading_level_for_next_split(blocks: &[BlockInfo]) -> Option<usize> {
-    // Find heading levels that have markers (excluding first block)
-    let levels_with_markers: Vec<usize> = blocks[1..]
-        .iter()
-        .filter_map(|block| {
-            if let BlockType::Heading(level) = block.block_type {
-                if block_has_markers(block) {
-                    return Some(level);
-                }
-            }
-            None
-        })
-        .collect();
-
-    if levels_with_markers.is_empty() {
-        return None;
-    }
-
-    // Count headings at each level
-    let mut level_counts: HashMap<usize, usize> = HashMap::new();
-    for block in blocks {
-        if let BlockType::Heading(level) = block.block_type {
-            *level_counts.entry(level).or_insert(0) += 1;
-        }
-    }
-
-    // Return the minimum level that either:
-    // - Has count >= 2
-    // - Has a marker (excluding first block)
-    let levels_with_multiple: Vec<usize> = level_counts
-        .into_iter()
-        .filter(|(_, count)| *count >= 2)
-        .map(|(level, _)| level)
-        .collect();
-
-    let mut candidates = levels_with_multiple;
-    candidates.extend(levels_with_markers);
-
-    candidates.into_iter().min()
-}
-
-/// Split a slice at the given positions.
-fn split_at<T: Clone>(items: &[T], positions: &[usize]) -> Vec<Vec<T>> {
-    let mut all_positions: Vec<usize> = vec![0];
-    all_positions.extend(positions.iter().cloned());
-    all_positions.push(items.len());
-    all_positions.sort();
-    all_positions.dedup();
-
-    all_positions
-        .windows(2)
-        .map(|window| items[window[0]..window[1]].to_vec())
-        .filter(|v| !v.is_empty())
-        .collect()
-}
-
-/// Parse blocks into shard hierarchy based on headings.
-fn parse_header_shards(
-    blocks: &[BlockInfo],
-    start_line: usize,
-    end_line: usize,
-    use_first_child_as_header: bool,
-) -> Option<Shard> {
-    if blocks.is_empty() {
-        return Some(build_shard(start_line, end_line, vec![], vec![], vec![]));
-    }
-
-    let split_at_heading_level = calculate_heading_level_for_next_split(blocks);
-
-    if split_at_heading_level.is_none() {
-        return parse_multiple_block_shards(blocks, start_line, end_line, true).0;
-    }
-
-    let heading_level = split_at_heading_level.unwrap();
-    let heading_positions = find_headings_by_level(blocks, heading_level);
-    let block_groups = split_at(blocks, &heading_positions);
-
-    let mut children = Vec::new();
-
-    for (i, group) in block_groups.iter().enumerate() {
-        if group.is_empty() {
-            continue;
-        }
-
-        let child_start_line = group[0].start_line;
-        let child_end_line = if i + 1 < block_groups.len() && !block_groups[i + 1].is_empty() {
-            block_groups[i + 1][0].start_line - 1
-        } else {
-            end_line
-        };
-
-        if let Some(child_shard) = parse_header_shards(
-            group,
-            child_start_line,
-            child_end_line,
-            i > 0 || heading_positions.contains(&0),
-        ) {
-            children.push(child_shard);
-        }
-    }
-
-    if use_first_child_as_header && !children.is_empty() {
-        Some(merge_into_first_shard(
-            children,
-            start_line,
-            end_line,
-            vec![],
-        ))
-    } else {
-        Some(build_shard(start_line, end_line, vec![], vec![], children))
-    }
-}
-
-/// Parse multiple blocks into shards.
-fn parse_multiple_block_shards(
-    blocks: &[BlockInfo],
-    start_line: usize,
-    end_line: usize,
-    enforce_shard: bool,
-) -> (Option<Shard>, Vec<String>) {
-    if blocks.is_empty() {
-        if enforce_shard {
-            return (
-                Some(build_shard(start_line, end_line, vec![], vec![], vec![])),
-                vec![],
-            );
-        }
-        return (None, vec![]);
-    }
-
-    let is_first_block_heading =
-        matches!(blocks[0].block_type, BlockType::Heading(_)) && block_has_markers(&blocks[0]);
-
-    let paragraph_positions = find_paragraph_shard_positions(blocks);
-    let mut children = Vec::new();
-    let mut tags = Vec::new();
-    let mut is_first_block_only_with_marker = false;
-
-    for (i, block) in blocks.iter().enumerate() {
-        if paragraph_positions.contains(&i) {
-            is_first_block_only_with_marker = i == 0;
-        }
-
-        let child_start_line = block.start_line;
-        let child_end_line = if i + 1 < blocks.len() {
-            blocks[i + 1].start_line - 1
-        } else {
-            end_line
-        };
-
-        let (child_shard, child_tags) =
-            parse_single_block_shard(block, child_start_line, child_end_line);
-
-        if let Some(shard) = child_shard {
-            children.push(shard);
-        }
-        tags.extend(child_tags);
-    }
-
-    if children.is_empty() && !enforce_shard {
-        return (None, tags);
-    }
-
-    if is_first_block_heading || is_first_block_only_with_marker {
-        (
-            Some(merge_into_first_shard(children, start_line, end_line, tags)),
-            vec![],
-        )
-    } else {
-        (
-            Some(build_shard(start_line, end_line, vec![], tags, children)),
-            vec![],
-        )
-    }
-}
-
-/// Parse a single block into a shard.
-fn parse_single_block_shard(
-    block: &BlockInfo,
-    start_line: usize,
-    end_line: usize,
-) -> (Option<Shard>, Vec<String>) {
-    match block.block_type {
-        BlockType::Paragraph | BlockType::Heading(_) => {
-            let (markers, tags) = extract_block_markers_and_tags(block);
-            if markers.is_empty() {
-                (None, tags)
-            } else {
-                (
-                    Some(build_shard(start_line, end_line, markers, tags, vec![])),
-                    vec![],
-                )
-            }
-        }
-        BlockType::List | BlockType::ListItem => {
-            // List handling is complex - for now, extract any markers/tags
-            let (markers, tags) = extract_block_markers_and_tags(block);
-            if markers.is_empty() {
-                (None, tags)
-            } else {
-                (
-                    Some(build_shard(start_line, end_line, markers, tags, vec![])),
-                    vec![],
-                )
-            }
-        }
-        _ => (None, vec![]),
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    fn make_file_name() -> String {
-        "test.md".to_string()
-    }
-
-    #[test]
-    fn test_parse_empty_file() {
-        let result = parse_markdown_file(&make_file_name(), "");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard::new(1, 1)),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_basic_one_line_file() {
-        let result = parse_markdown_file(&make_file_name(), "Hello World");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard::new(1, 1)),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_basic_multi_line_file() {
-        let result = parse_markdown_file(&make_file_name(), "Hello World\n\nHello again!");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard::new(1, 3)),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_single_line_with_tag() {
-        let result = parse_markdown_file(&make_file_name(), "@Tag Hello World");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard {
-                    markers: vec!["Tag".to_string()],
-                    tags: vec![],
-                    start_line: 1,
-                    end_line: 1,
-                    children: vec![],
-                }),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_single_line_with_two_tags() {
-        let result = parse_markdown_file(&make_file_name(), "@Marker1 @Marker2 Hello World");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard {
-                    markers: vec!["Marker1".to_string(), "Marker2".to_string()],
-                    tags: vec![],
-                    start_line: 1,
-                    end_line: 1,
-                    children: vec![],
-                }),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_single_line_with_two_tags_and_misplaced_tag() {
-        let result = parse_markdown_file(&make_file_name(), "@Tag1 @Tag2 Hello World @Tag3");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard {
-                    markers: vec!["Tag1".to_string(), "Tag2".to_string()],
-                    tags: vec!["Tag3".to_string()],
-                    start_line: 1,
-                    end_line: 1,
-                    children: vec![],
-                }),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_header_without_markers() {
-        let result = parse_markdown_file(&make_file_name(), "# Heading\n\n## Subheading");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard::new(1, 3)),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_ignores_tags_in_code() {
-        let result = parse_markdown_file(&make_file_name(), "```\n@Marker\n```");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard::new(1, 3)),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_finds_tags_in_italic_text() {
-        let result = parse_markdown_file(&make_file_name(), "*@ItalicMarker*");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard {
-                    markers: vec!["ItalicMarker".to_string()],
-                    tags: vec![],
-                    start_line: 1,
-                    end_line: 1,
-                    children: vec![],
-                }),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_finds_tags_in_bold_text() {
-        let result = parse_markdown_file(&make_file_name(), "**@BoldMarker**");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard {
-                    markers: vec!["BoldMarker".to_string()],
-                    tags: vec![],
-                    start_line: 1,
-                    end_line: 1,
-                    children: vec![],
-                }),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_finds_tags_in_strikethrough_text() {
-        let result = parse_markdown_file(&make_file_name(), "~~@StrikeMarker~~");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard {
-                    markers: vec!["StrikeMarker".to_string()],
-                    tags: vec![],
-                    start_line: 1,
-                    end_line: 1,
-                    children: vec![],
-                }),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_finds_tags_in_link() {
-        let result = parse_markdown_file(&make_file_name(), "[@LinkMarker](https://example.com)");
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard {
-                    markers: vec!["LinkMarker".to_string()],
-                    tags: vec![],
-                    start_line: 1,
-                    end_line: 1,
-                    children: vec![],
-                }),
-            }
-        );
-    }
-
-    #[test]
-    fn test_parse_continues_looking_for_markers_after_first_link_marker() {
-        let result = parse_markdown_file(
-            &make_file_name(),
-            "[@LinkMarker1](https://example.com) [@LinkMarker2](https://example.com)",
-        );
-        assert_eq!(
-            result,
-            StreamFile {
-                file_name: make_file_name(),
-                shard: Some(Shard {
-                    markers: vec!["LinkMarker1".to_string(), "LinkMarker2".to_string()],
-                    tags: vec![],
-                    start_line: 1,
-                    end_line: 1,
-                    children: vec![],
-                }),
-            }
-        );
-    }
-}
diff --git a/src/extract/tag_extraction.rs b/src/extract/tag_extraction.rs
deleted file mode 100644
index f118156..0000000
--- a/src/extract/tag_extraction.rs
+++ /dev/null
@@ -1,219 +0,0 @@
-use once_cell::sync::Lazy;
-use pulldown_cmark::{Event, Tag, TagEnd};
-use regex::Regex;
-
-/// Regex pattern for matching @Tags.
-/// Matches @ followed by any characters except whitespace, *, `, ~, [, ]
-static TAG_PATTERN: Lazy<Regex> = Lazy::new(|| Regex::new(r"@([^\s*`~\[\]]+)").unwrap());
-
-/// Token type for tag extraction state machine.
-#[derive(Debug, Clone)]
-enum Token {
-    Tag(String),
-    Content,
-    Whitespace,
-}
-
-/// Tokenizes text content into Tags, Content, and Whitespace tokens.
-fn tokenize(text: &str) -> Vec<Token> {
-    let mut tokens = Vec::new();
-    let mut last_end = 0;
-
-    for mat in TAG_PATTERN.find_iter(text) {
-        // Handle content before the match
-        let before = &text[last_end..mat.start()];
-        if !before.is_empty() {
-            if before.chars().all(|c| c.is_whitespace()) {
-                tokens.push(Token::Whitespace);
-            } else {
-                tokens.push(Token::Content);
-            }
-        }
-
-        // Extract the tag name (without the @)
-        let tag_name = &text[mat.start() + 1..mat.end()];
-        tokens.push(Token::Tag(tag_name.to_string()));
-        last_end = mat.end();
-    }
-
-    // Handle remaining content after last match
-    if last_end < text.len() {
-        let remaining = &text[last_end..];
-        if !remaining.is_empty() {
-            if remaining.chars().all(|c| c.is_whitespace()) {
-                tokens.push(Token::Whitespace);
-            } else {
-                tokens.push(Token::Content);
-            }
-        }
-    }
-
-    tokens
-}
-
-/// Extract markers and tags from a sequence of pulldown-cmark events.
-///
-/// Markers are @-prefixed identifiers that appear before any non-whitespace content.
-/// Tags are @-prefixed identifiers that appear after content has started.
-///
-/// Returns (markers, tags).
-pub fn extract_markers_and_tags<'a>(
-    events: impl Iterator<Item = Event<'a>>,
-) -> (Vec<String>, Vec<String>) {
-    let mut markers = Vec::new();
-    let mut tags = Vec::new();
-    let mut boundary_crossed = false;
-    let mut in_code = false;
-
-    for event in events {
-        match event {
-            Event::Start(Tag::CodeBlock(_)) | Event::Start(Tag::MetadataBlock(_)) => {
-                in_code = true;
-            }
-            Event::End(TagEnd::CodeBlock) | Event::End(TagEnd::MetadataBlock(_)) => {
-                in_code = false;
-            }
-            Event::Code(_) => {
-                // Inline code is a content boundary but we don't extract tags from it
-                boundary_crossed = true;
-            }
-            Event::Text(text) | Event::InlineHtml(text) if !in_code => {
-                for token in tokenize(&text) {
-                    match token {
-                        Token::Whitespace => {}
-                        Token::Tag(name) => {
-                            if boundary_crossed {
-                                tags.push(name);
-                            } else {
-                                markers.push(name);
-                            }
-                        }
-                        Token::Content => {
-                            boundary_crossed = true;
-                        }
-                    }
-                }
-            }
-            _ => {}
-        }
-    }
-
-    (markers, tags)
-}
-
-/// Check if the events contain any markers (tags before content).
-pub fn has_markers<'a>(events: impl Iterator<Item = Event<'a>>) -> bool {
-    let (markers, _) = extract_markers_and_tags(events);
-    !markers.is_empty()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use pulldown_cmark::Parser;
-
-    fn extract_from_text(text: &str) -> (Vec<String>, Vec<String>) {
-        let mut options = pulldown_cmark::Options::empty();
-        options.insert(pulldown_cmark::Options::ENABLE_STRIKETHROUGH);
-        let parser = Parser::new_ext(text, options);
-        extract_markers_and_tags(parser)
-    }
-
-    #[test]
-    fn test_extract_single_marker() {
-        let (markers, tags) = extract_from_text("@Tag Hello World");
-        assert_eq!(markers, vec!["Tag"]);
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_extract_two_markers() {
-        let (markers, tags) = extract_from_text("@Marker1 @Marker2 Hello World");
-        assert_eq!(markers, vec!["Marker1", "Marker2"]);
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_extract_markers_and_tags() {
-        let (markers, tags) = extract_from_text("@Tag1 @Tag2 Hello World @Tag3");
-        assert_eq!(markers, vec!["Tag1", "Tag2"]);
-        assert_eq!(tags, vec!["Tag3"]);
-    }
-
-    #[test]
-    fn test_extract_inner_tags() {
-        let (markers, tags) = extract_from_text("Hello @Tag1 World!");
-        assert!(markers.is_empty());
-        assert_eq!(tags, vec!["Tag1"]);
-    }
-
-    #[test]
-    fn test_extract_ignores_code_blocks() {
-        let (markers, tags) = extract_from_text("```\n@Marker\n```");
-        assert!(markers.is_empty());
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_extract_italic_marker() {
-        let (markers, tags) = extract_from_text("*@ItalicMarker*");
-        assert_eq!(markers, vec!["ItalicMarker"]);
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_extract_bold_marker() {
-        let (markers, tags) = extract_from_text("**@BoldMarker**");
-        assert_eq!(markers, vec!["BoldMarker"]);
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_extract_strikethrough_marker() {
-        let (markers, tags) = extract_from_text("~~@StrikeMarker~~");
-        assert_eq!(markers, vec!["StrikeMarker"]);
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_extract_link_marker() {
-        let (markers, tags) = extract_from_text("[@LinkMarker](https://example.com)");
-        assert_eq!(markers, vec!["LinkMarker"]);
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_extract_multiple_link_markers() {
-        let (markers, tags) = extract_from_text(
-            "[@LinkMarker1](https://example.com) [@LinkMarker2](https://example.com)",
-        );
-        assert_eq!(markers, vec!["LinkMarker1", "LinkMarker2"]);
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_has_markers_true() {
-        let parser = Parser::new("@Tag Hello");
-        assert!(has_markers(parser));
-    }
-
-    #[test]
-    fn test_has_markers_false() {
-        let parser = Parser::new("Hello @Tag");
-        assert!(!has_markers(parser));
-    }
-
-    #[test]
-    fn test_empty_text() {
-        let (markers, tags) = extract_from_text("");
-        assert!(markers.is_empty());
-        assert!(tags.is_empty());
-    }
-
-    #[test]
-    fn test_no_tags() {
-        let (markers, tags) = extract_from_text("Hello World");
-        assert!(markers.is_empty());
-        assert!(tags.is_empty());
-    }
-}
diff --git a/src/lib.rs b/src/lib.rs
deleted file mode 100644
index 6b9a3dd..0000000
--- a/src/lib.rs
+++ /dev/null
@@ -1,14 +0,0 @@
-pub mod cli;
-pub mod config;
-pub mod error;
-pub mod extract;
-pub mod localize;
-pub mod models;
-pub mod query;
-pub mod timesheet;
-
-pub use error::StreamdError;
-pub use models::{
-    Dimension, LocalizedShard, Marker, MarkerPlacement, RepositoryConfiguration, Shard,
-    SpecialDayType, StreamFile, Timecard, Timesheet,
-};
diff --git a/src/localize/configuration.rs b/src/localize/configuration.rs
deleted file mode 100644
index df30561..0000000
--- a/src/localize/configuration.rs
+++ /dev/null
@@ -1,448 +0,0 @@
-use std::collections::BTreeSet;
-
-use indexmap::IndexMap;
-
-use crate::models::{Dimension, Marker, MarkerPlacement, RepositoryConfiguration};
-
-/// Merge two dimensions, with the second taking precedence.
-///
-/// - display_name: second wins if non-empty, else base
-/// - comment: second wins if not None, else base
-/// - propagate: second wins if explicitly set, else base
-pub fn merge_single_dimension(base: &Dimension, second: &Dimension) -> Dimension {
-    Dimension {
-        display_name: if second.display_name.is_empty() {
-            base.display_name.clone()
-        } else {
-            second.display_name.clone()
-        },
-        comment: if second.comment.is_some() {
-            second.comment.clone()
-        } else {
-            base.comment.clone()
-        },
-        propagate: if second.propagate_was_set {
-            second.propagate
-        } else {
-            base.propagate
-        },
-        propagate_was_set: second.propagate_was_set || base.propagate_was_set,
-    }
-}
-
-/// Merge two dimension maps.
-pub fn merge_dimensions(
-    base: &IndexMap<String, Dimension>,
-    second: &IndexMap<String, Dimension>,
-) -> IndexMap<String, Dimension> {
-    let mut merged = base.clone();
-
-    for (key, second_dim) in second {
-        if let Some(base_dim) = merged.get(key) {
-            merged.insert(key.clone(), merge_single_dimension(base_dim, second_dim));
-        } else {
-            merged.insert(key.clone(), second_dim.clone());
-        }
-    }
-
-    merged
-}
-
-/// Create a placement identity tuple for deduplication.
-/// We use BTreeSet to make it hashable and order-independent.
-fn placement_identity(p: &MarkerPlacement) -> (BTreeSet<String>, String) {
-    (p.if_with.iter().cloned().collect(), p.dimension.clone())
-}
-
-/// Merge two markers, with the second taking precedence.
-pub fn merge_single_marker(base: &Marker, second: &Marker) -> Marker {
-    let display_name = if second.display_name.is_empty() {
-        base.display_name.clone()
-    } else {
-        second.display_name.clone()
-    };
-
-    let mut merged_placements: Vec<MarkerPlacement> = Vec::new();
-    let mut seen: IndexMap<(BTreeSet<String>, String), usize> = IndexMap::new();
-
-    for placement in &base.placements {
-        let ident = placement_identity(placement);
-        seen.insert(ident, merged_placements.len());
-        merged_placements.push(placement.clone());
-    }
-
-    for placement in &second.placements {
-        let ident = placement_identity(placement);
-        if let Some(&idx) = seen.get(&ident) {
-            merged_placements[idx] = placement.clone();
-        } else {
-            seen.insert(ident, merged_placements.len());
-            merged_placements.push(placement.clone());
-        }
-    }
-
-    Marker {
-        display_name,
-        placements: merged_placements,
-    }
-}
-
-/// Merge two marker maps.
-pub fn merge_markers(
-    base: &IndexMap<String, Marker>,
-    second: &IndexMap<String, Marker>,
-) -> IndexMap<String, Marker> {
-    let mut merged = base.clone();
-
-    for (key, second_marker) in second {
-        if let Some(base_marker) = merged.get(key) {
-            merged.insert(key.clone(), merge_single_marker(base_marker, second_marker));
-        } else {
-            merged.insert(key.clone(), second_marker.clone());
-        }
-    }
-
-    merged
-}
-
-/// Merge two repository configurations.
-pub fn merge_repository_configuration(
-    base: &RepositoryConfiguration,
-    second: &RepositoryConfiguration,
-) -> RepositoryConfiguration {
-    RepositoryConfiguration {
-        dimensions: merge_dimensions(&base.dimensions, &second.dimensions),
-        markers: merge_markers(&base.markers, &second.markers),
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_second_overrides_display_name_when_non_empty() {
-        let base = Dimension::new("Base")
-            .with_comment("c1")
-            .with_propagate(true);
-        let second = Dimension::new("Second")
-            .with_comment("c2")
-            .with_propagate(false);
-
-        let merged = merge_single_dimension(&base, &second);
-
-        assert_eq!(merged.display_name, "Second");
-        assert_eq!(merged.comment, Some("c2".to_string()));
-        assert!(!merged.propagate);
-    }
-
-    #[test]
-    fn test_second_empty_display_name_falls_back_to_base() {
-        let base = Dimension::new("Base")
-            .with_comment("c1")
-            .with_propagate(true);
-        let second = Dimension::new("").with_comment("c2").with_propagate(false);
-
-        let merged = merge_single_dimension(&base, &second);
-
-        assert_eq!(merged.display_name, "Base");
-        assert_eq!(merged.comment, Some("c2".to_string()));
-        assert!(!merged.propagate);
-    }
-
-    #[test]
-    fn test_second_comment_none_does_not_erase_base_comment() {
-        let base = Dimension::new("Base")
-            .with_comment("keep")
-            .with_propagate(true);
-        let mut second = Dimension::new("Second");
-        second.propagate = false;
-        second.propagate_was_set = true;
-
-        let merged = merge_single_dimension(&base, &second);
-
-        assert_eq!(merged.display_name, "Second");
-        assert_eq!(merged.comment, Some("keep".to_string()));
-    }
-
-    #[test]
-    fn test_second_comment_non_none_overrides_base_comment() {
-        let base = Dimension::new("Base")
-            .with_comment("c1")
-            .with_propagate(true);
-        let second = Dimension::new("Second")
-            .with_comment("c2")
-            .with_propagate(true);
-
-        let merged = merge_single_dimension(&base, &second);
-
-        assert_eq!(merged.comment, Some("c2".to_string()));
-    }
-
-    #[test]
-    fn test_second_propagate_overrides_base_when_provided() {
-        let base = Dimension::new("Base")
-            .with_comment("c1")
-            .with_propagate(true);
-        let second = Dimension::new("Second")
-            .with_comment("c2")
-            .with_propagate(false);
-
-        let merged = merge_single_dimension(&base, &second);
-
-        assert!(!merged.propagate);
-    }
-
-    #[test]
-    fn test_propagate_merging_retains_base_when_second_not_provided() {
-        let base = Dimension::new("Base")
-            .with_comment("c1")
-            .with_propagate(true);
-        let second = Dimension::new("Second").with_comment("c2");
-
-        let merged = merge_single_dimension(&base, &second);
-
-        assert!(merged.propagate);
-    }
-
-    #[test]
-    fn test_adds_new_keys_from_second() {
-        let mut base = IndexMap::new();
-        base.insert("a".to_string(), Dimension::new("A").with_propagate(true));
-
-        let mut second = IndexMap::new();
-        second.insert("b".to_string(), Dimension::new("B").with_propagate(false));
-
-        let merged = merge_dimensions(&base, &second);
-
-        assert!(merged.contains_key("a"));
-        assert!(merged.contains_key("b"));
-        assert_eq!(merged["a"].display_name, "A");
-        assert_eq!(merged["b"].display_name, "B");
-    }
-
-    #[test]
-    fn test_merges_existing_keys() {
-        let mut base = IndexMap::new();
-        base.insert(
-            "a".to_string(),
-            Dimension::new("A").with_comment("c1").with_propagate(true),
-        );
-
-        let mut second = IndexMap::new();
-        second.insert("a".to_string(), Dimension::new("A2").with_propagate(false));
-
-        let merged = merge_dimensions(&base, &second);
-
-        assert_eq!(merged["a"].display_name, "A2");
-        assert_eq!(merged["a"].comment, Some("c1".to_string()));
-        assert!(!merged["a"].propagate);
-    }
-
-    #[test]
-    fn test_does_not_mutate_inputs() {
-        let mut base = IndexMap::new();
-        base.insert(
-            "a".to_string(),
-            Dimension::new("A").with_comment("c1").with_propagate(true),
-        );
-
-        let mut second = IndexMap::new();
-        second.insert(
-            "b".to_string(),
-            Dimension::new("B").with_comment("c2").with_propagate(false),
-        );
-
-        let merged = merge_dimensions(&base, &second);
-
-        assert!(!base.contains_key("b"));
-        assert!(!second.contains_key("a"));
-        assert!(merged.contains_key("a"));
-        assert!(merged.contains_key("b"));
-    }
-
-    #[test]
-    fn test_second_marker_overrides_display_name_when_non_empty() {
-        let base = Marker::new("Base").with_placements(vec![MarkerPlacement::new("project")]);
-        let second = Marker::new("Second")
-            .with_placements(vec![MarkerPlacement::new("timesheet").with_value("coding")]);
-
-        let merged = merge_single_marker(&base, &second);
-
-        assert_eq!(merged.display_name, "Second");
-        assert_eq!(merged.placements.len(), 2);
-        assert_eq!(merged.placements[0].dimension, "project");
-        assert_eq!(merged.placements[1].dimension, "timesheet");
-    }
-
-    #[test]
-    fn test_second_marker_empty_display_name_falls_back_to_base() {
-        let base = Marker::new("Base").with_placements(vec![]);
-        let second = Marker::new("").with_placements(vec![]);
-
-        let merged = merge_single_marker(&base, &second);
-
-        assert_eq!(merged.display_name, "Base");
-    }
-
-    #[test]
-    fn test_appends_new_placements() {
-        let base = Marker::new("Base").with_placements(vec![MarkerPlacement::new("project")]);
-        let second = Marker::new("Second").with_placements(vec![MarkerPlacement::new("timesheet")
-            .with_if_with(vec!["Timesheet"])
-            .with_value("x")]);
-
-        let merged = merge_single_marker(&base, &second);
-
-        assert_eq!(merged.placements.len(), 2);
-        assert_eq!(merged.placements[0].dimension, "project");
-        assert_eq!(merged.placements[1].dimension, "timesheet");
-    }
-
-    #[test]
-    fn test_deduplicates_by_identity_and_second_overrides_base() {
-        let base = Marker::new("Base").with_placements(vec![
-            MarkerPlacement::new("d")
-                .with_if_with(vec!["A"])
-                .with_value("v"),
-            MarkerPlacement::new("d")
-                .with_if_with(vec!["B"])
-                .with_value("v2"),
-        ]);
-        let second = Marker::new("Second").with_placements(vec![
-            MarkerPlacement::new("d")
-                .with_if_with(vec!["A"])
-                .with_value("v"),
-            MarkerPlacement::new("d")
-                .with_if_with(vec!["C"])
-                .with_value("v3"),
-        ]);
-
-        let merged = merge_single_marker(&base, &second);
-
-        assert_eq!(merged.placements.len(), 3);
-        // First placement (A, d) should be from second
-        assert_eq!(
-            merged.placements[0].if_with.iter().collect::<Vec<_>>(),
-            vec!["A"]
-        );
-        // Second placement (B, d) should be from base
-        assert_eq!(
-            merged.placements[1].if_with.iter().collect::<Vec<_>>(),
-            vec!["B"]
-        );
-        // Third placement (C, d) should be from second
-        assert_eq!(
-            merged.placements[2].if_with.iter().collect::<Vec<_>>(),
-            vec!["C"]
-        );
-    }
-
-    #[test]
-    fn test_identity_is_order_insensitive_for_if_with() {
-        let base = Marker::new("Base").with_placements(vec![MarkerPlacement::new("d")
-            .with_if_with(vec!["A", "B"])
-            .with_value("v")]);
-        let second = Marker::new("Second").with_placements(vec![MarkerPlacement::new("d")
-            .with_if_with(vec!["B", "A"])
-            .with_value("v2")]);
-
-        let merged = merge_single_marker(&base, &second);
-
-        // With if_with as a set, identity is order-insensitive; second overrides base.
-        assert_eq!(merged.placements.len(), 1);
-        assert_eq!(merged.placements[0].value, Some("v2".to_string()));
-    }
-
-    #[test]
-    fn test_adds_new_marker_keys_from_second() {
-        let mut base = IndexMap::new();
-        base.insert("M1".to_string(), Marker::new("M1").with_placements(vec![]));
-
-        let mut second = IndexMap::new();
-        second.insert("M2".to_string(), Marker::new("M2").with_placements(vec![]));
-
-        let merged = merge_markers(&base, &second);
-
-        assert!(merged.contains_key("M1"));
-        assert!(merged.contains_key("M2"));
-    }
-
-    #[test]
-    fn test_merges_existing_marker_keys() {
-        let mut base = IndexMap::new();
-        base.insert(
-            "M".to_string(),
-            Marker::new("Base").with_placements(vec![MarkerPlacement::new("project")]),
-        );
-
-        let mut second = IndexMap::new();
-        second.insert(
-            "M".to_string(),
-            Marker::new("Second").with_placements(vec![MarkerPlacement::new("timesheet")
-                .with_if_with(vec!["Timesheet"])
-                .with_value("coding")]),
-        );
-
-        let merged = merge_markers(&base, &second);
-
-        assert_eq!(merged["M"].display_name, "Second");
-        assert_eq!(merged["M"].placements.len(), 2);
-    }
-
-    #[test]
-    fn test_merge_repository_configuration() {
-        let base = RepositoryConfiguration::new()
-            .with_dimension(
-                "project",
-                Dimension::new("Project")
-                    .with_comment("c1")
-                    .with_propagate(true),
-            )
-            .with_dimension(
-                "moment",
-                Dimension::new("Moment")
-                    .with_comment("c2")
-                    .with_propagate(true),
-            )
-            .with_marker(
-                "Streamd",
-                Marker::new("Streamd").with_placements(vec![MarkerPlacement::new("project")]),
-            );
-
-        let second = RepositoryConfiguration::new()
-            .with_dimension("project", Dimension::new("Project2").with_propagate(false))
-            .with_dimension(
-                "timesheet",
-                Dimension::new("Timesheet")
-                    .with_comment("c3")
-                    .with_propagate(false),
-            )
-            .with_marker(
-                "Streamd",
-                Marker::new("Streamd2").with_placements(vec![MarkerPlacement::new("timesheet")
-                    .with_if_with(vec!["Timesheet"])
-                    .with_value("coding")]),
-            )
-            .with_marker(
-                "JobHunting",
-                Marker::new("JobHunting").with_placements(vec![MarkerPlacement::new("project")]),
-            );
-
-        let merged = merge_repository_configuration(&base, &second);
-
-        assert!(merged.dimensions.contains_key("project"));
-        assert!(merged.dimensions.contains_key("moment"));
-        assert!(merged.dimensions.contains_key("timesheet"));
-        assert_eq!(merged.dimensions["project"].display_name, "Project2");
-        assert_eq!(merged.dimensions["project"].comment, Some("c1".to_string()));
-        assert!(!merged.dimensions["project"].propagate);
-        assert_eq!(merged.dimensions["moment"].display_name, "Moment");
-        assert_eq!(merged.dimensions["timesheet"].display_name, "Timesheet");
-
-        assert!(merged.markers.contains_key("Streamd"));
-        assert!(merged.markers.contains_key("JobHunting"));
-        assert_eq!(merged.markers["Streamd"].display_name, "Streamd2");
-        assert_eq!(merged.markers["Streamd"].placements.len(), 2);
-    }
-}
diff --git a/src/localize/datetime.rs b/src/localize/datetime.rs
deleted file mode 100644
index 87a2718..0000000
--- a/src/localize/datetime.rs
+++ /dev/null
@@ -1,365 +0,0 @@
-use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime, Utc};
-use once_cell::sync::Lazy;
-use regex::Regex;
-use std::path::Path;
-
-/// Regex for extracting date and optional time from file names.
-/// Format: YYYYMMDD or YYYYMMDD-HHMMSS (time can be 4-6 digits)
-static FILE_NAME_REGEX: Lazy<Regex> =
-    Lazy::new(|| Regex::new(r"^(?P<date>\d{8})(?:-(?P<time>\d{4,6}))?.+\.md$").unwrap());
-
-/// Regex for validating datetime marker format (14 digits).
-static DATETIME_MARKER_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"^\d{14}$").unwrap());
-
-/// Regex for validating date marker format (8 digits).
-static DATE_MARKER_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"^\d{8}$").unwrap());
-
-/// Regex for validating time marker format (6 digits).
-static TIME_MARKER_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"^\d{6}$").unwrap());
-
-/// Extract a datetime from a file name in the format YYYYMMDD-HHMMSS.
-///
-/// The time component is optional and can be 4-6 digits (HHMM, HHMMS, or HHMMSS).
-///
-/// # Examples
-/// - "20230101-123456 Some Text.md" -> DateTime for 2023-01-01 12:34:56
-/// - "20230101 Some Text.md" -> DateTime for 2023-01-01 00:00:00
-/// - "invalid-file-name.md" -> None
-pub fn extract_datetime_from_file_name(file_name: &str) -> Option<DateTime<Utc>> {
-    let base_name = Path::new(file_name)
-        .file_name()
-        .and_then(|s| s.to_str())
-        .unwrap_or(file_name);
-
-    let captures = FILE_NAME_REGEX.captures(base_name)?;
-    let date_str = captures.name("date")?.as_str();
-    let time_str = captures.name("time").map(|m| m.as_str()).unwrap_or("");
-
-    // Pad time string to 6 digits
-    let time_str = format!("{:0<6}", time_str);
-
-    let datetime_str = format!(
-        "{} {}:{}:{}",
-        date_str,
-        &time_str[0..2],
-        &time_str[2..4],
-        &time_str[4..6]
-    );
-
-    NaiveDateTime::parse_from_str(&datetime_str, "%Y%m%d %H:%M:%S")
-        .ok()
-        .map(|dt| dt.and_utc())
-}
-
-/// Extract a datetime from a marker string in the exact format: YYYYMMDDHHMMSS.
-///
-/// Returns the parsed datetime if the format matches and values are valid.
-pub fn extract_datetime_from_marker(marker: &str) -> Option<DateTime<Utc>> {
-    if !DATETIME_MARKER_REGEX.is_match(marker) {
-        return None;
-    }
-
-    NaiveDateTime::parse_from_str(marker, "%Y%m%d%H%M%S")
-        .ok()
-        .map(|dt| dt.and_utc())
-}
-
-/// Extract a date from a marker string in the exact format: YYYYMMDD.
-///
-/// Returns the parsed date if the format matches and values are valid.
-pub fn extract_date_from_marker(marker: &str) -> Option<NaiveDate> {
-    if !DATE_MARKER_REGEX.is_match(marker) {
-        return None;
-    }
-
-    NaiveDate::parse_from_str(marker, "%Y%m%d").ok()
-}
-
-/// Extract a time from a marker string in the exact format: HHMMSS.
-///
-/// Returns the parsed time if the format matches and values are valid.
-pub fn extract_time_from_marker(marker: &str) -> Option<NaiveTime> {
-    if !TIME_MARKER_REGEX.is_match(marker) {
-        return None;
-    }
-
-    NaiveTime::parse_from_str(marker, "%H%M%S").ok()
-}
-
-/// Extract a datetime from a list of markers, using an inherited datetime as fallback.
-///
-/// The function processes markers in reverse order, allowing later markers to override
-/// earlier ones. It combines date-only and time-only markers when both are present.
-///
-/// Rules:
-/// - If a full datetime marker (14 digits) is found, it sets both date and time
-/// - If only a date marker is found, the time defaults to midnight
-/// - If only a time marker is found, the date is inherited
-/// - If no valid markers are found, the inherited datetime is returned
-pub fn extract_datetime_from_marker_list(
-    markers: &[String],
-    inherited_datetime: DateTime<Utc>,
-) -> DateTime<Utc> {
-    let mut shard_time: Option<NaiveTime> = None;
-    let mut shard_date: Option<NaiveDate> = None;
-
-    // Process markers in reverse order (last wins)
-    for marker in markers.iter().rev() {
-        if let Some(time) = extract_time_from_marker(marker) {
-            shard_time = Some(time);
-        }
-        if let Some(date) = extract_date_from_marker(marker) {
-            shard_date = Some(date);
-        }
-        if let Some(datetime) = extract_datetime_from_marker(marker) {
-            shard_date = Some(datetime.naive_utc().date());
-            shard_time = Some(datetime.naive_utc().time());
-        }
-    }
-
-    // Combine date and time, applying defaults as needed
-    let final_date = shard_date.unwrap_or_else(|| inherited_datetime.naive_utc().date());
-    let final_time = match (shard_date, shard_time) {
-        // If we have a date but no time, use midnight
-        (Some(_), None) => NaiveTime::from_hms_opt(0, 0, 0).unwrap(),
-        // Otherwise use the shard time or inherit
-        _ => shard_time.unwrap_or_else(|| inherited_datetime.naive_utc().time()),
-    };
-
-    NaiveDateTime::new(final_date, final_time).and_utc()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use chrono::TimeZone;
-
-    #[test]
-    fn test_extract_date_from_file_name_valid() {
-        let file_name = "20230101-123456 Some Text.md";
-        assert_eq!(
-            extract_datetime_from_file_name(file_name),
-            Some(Utc.with_ymd_and_hms(2023, 1, 1, 12, 34, 56).unwrap())
-        );
-    }
-
-    #[test]
-    fn test_extract_date_from_file_name_invalid() {
-        let file_name = "invalid-file-name.md";
-        assert_eq!(extract_datetime_from_file_name(file_name), None);
-    }
-
-    #[test]
-    fn test_extract_date_from_file_name_without_time() {
-        let file_name = "20230101 Some Text.md";
-        assert_eq!(
-            extract_datetime_from_file_name(file_name),
-            Some(Utc.with_ymd_and_hms(2023, 1, 1, 0, 0, 0).unwrap())
-        );
-    }
-
-    #[test]
-    fn test_extract_date_from_file_name_short_time() {
-        let file_name = "20230101-1234 Some Text.md";
-        assert_eq!(
-            extract_datetime_from_file_name(file_name),
-            Some(Utc.with_ymd_and_hms(2023, 1, 1, 12, 34, 0).unwrap())
-        );
-    }
-
-    #[test]
-    fn test_extract_date_from_file_name_empty_string() {
-        let file_name = "";
-        assert_eq!(extract_datetime_from_file_name(file_name), None);
-    }
-
-    #[test]
-    fn test_extract_date_from_file_name_with_full_path() {
-        let file_name = "/path/to/20230101-123456 Some Text.md";
-        assert_eq!(
-            extract_datetime_from_file_name(file_name),
-            Some(Utc.with_ymd_and_hms(2023, 1, 1, 12, 34, 56).unwrap())
-        );
-    }
-
-    #[test]
-    fn test_extract_datetime_from_marker_valid() {
-        let marker = "20250101150000";
-        assert_eq!(
-            extract_datetime_from_marker(marker),
-            Some(Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap())
-        );
-    }
-
-    #[test]
-    fn test_extract_datetime_from_marker_invalid_format() {
-        assert_eq!(extract_datetime_from_marker("2025010115000"), None); // too short
-        assert_eq!(extract_datetime_from_marker("202501011500000"), None); // too long
-        assert_eq!(extract_datetime_from_marker("2025-01-01T150000"), None); // separators
-        assert_eq!(extract_datetime_from_marker("2025010115000a"), None); // non-digit
-        assert_eq!(extract_datetime_from_marker(""), None);
-    }
-
-    #[test]
-    fn test_extract_datetime_from_marker_invalid_values() {
-        assert_eq!(extract_datetime_from_marker("20250230120000"), None); // Feb 30
-        assert_eq!(extract_datetime_from_marker("20250101126000"), None); // minute 60
-        assert_eq!(extract_datetime_from_marker("20250101240000"), None); // hour 24
-    }
-
-    #[test]
-    fn test_extract_date_from_marker_valid() {
-        let marker = "20250101";
-        assert_eq!(
-            extract_date_from_marker(marker),
-            Some(NaiveDate::from_ymd_opt(2025, 1, 1).unwrap())
-        );
-    }
-
-    #[test]
-    fn test_extract_date_from_marker_invalid_format() {
-        assert_eq!(extract_date_from_marker("2025010"), None); // too short
-        assert_eq!(extract_date_from_marker("202501011"), None); // too long
-        assert_eq!(extract_date_from_marker("2025-01-01"), None); // separators
-        assert_eq!(extract_date_from_marker("2025010a"), None); // non-digit
-        assert_eq!(extract_date_from_marker(""), None);
-    }
-
-    #[test]
-    fn test_extract_date_from_marker_invalid_values() {
-        assert_eq!(extract_date_from_marker("20250230"), None); // Feb 30
-        assert_eq!(extract_date_from_marker("20251301"), None); // month 13
-        assert_eq!(extract_date_from_marker("20250132"), None); // day 32
-    }
-
-    #[test]
-    fn test_extract_time_from_marker_valid() {
-        let marker = "150000";
-        assert_eq!(
-            extract_time_from_marker(marker),
-            Some(NaiveTime::from_hms_opt(15, 0, 0).unwrap())
-        );
-    }
-
-    #[test]
-    fn test_extract_time_from_marker_invalid_format() {
-        assert_eq!(extract_time_from_marker("15000"), None); // too short
-        assert_eq!(extract_time_from_marker("1500000"), None); // too long
-        assert_eq!(extract_time_from_marker("15:00:00"), None); // separators
-        assert_eq!(extract_time_from_marker("15000a"), None); // non-digit
-        assert_eq!(extract_time_from_marker(""), None);
-    }
-
-    #[test]
-    fn test_extract_time_from_marker_invalid_values() {
-        assert_eq!(extract_time_from_marker("240000"), None); // hour 24
-        assert_eq!(extract_time_from_marker("156000"), None); // minute 60
-                                                              // Note: chrono allows leap seconds (60), so 150060 is valid
-    }
-
-    #[test]
-    fn test_no_markers_inherits_datetime() {
-        let inherited = Utc.with_ymd_and_hms(2025, 1, 2, 3, 4, 5).unwrap();
-        assert_eq!(extract_datetime_from_marker_list(&[], inherited), inherited);
-    }
-
-    #[test]
-    fn test_unrelated_markers_inherits_datetime() {
-        let inherited = Utc.with_ymd_and_hms(2025, 1, 2, 3, 4, 5).unwrap();
-        let markers: Vec<String> = vec![
-            "not-a-marker".to_string(),
-            "2025-01-01".to_string(),
-            "1500".to_string(),
-            "1234567".to_string(),
-        ];
-        assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
-            inherited
-        );
-    }
-
-    #[test]
-    fn test_date_only_marker_sets_midnight() {
-        let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
-        let markers = vec!["20250101".to_string()];
-        assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
-            Utc.with_ymd_and_hms(2025, 1, 1, 0, 0, 0).unwrap()
-        );
-    }
-
-    #[test]
-    fn test_time_only_marker_inherits_date() {
-        let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
-        let markers = vec!["150000".to_string()];
-        assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
-            Utc.with_ymd_and_hms(2025, 6, 7, 15, 0, 0).unwrap()
-        );
-    }
-
-    #[test]
-    fn test_datetime_marker_overrides_both_date_and_time() {
-        let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
-        let markers = vec!["20250101150000".to_string()];
-        assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
-            Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
-        );
-    }
-
-    #[test]
-    fn test_combined_date_and_time_markers() {
-        let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
-        let markers = vec!["20250101".to_string(), "150000".to_string()];
-        assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
-            Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
-        );
-    }
-
-    #[test]
-    fn test_first_marker_wins_when_multiple_dates_or_times() {
-        let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
-        let markers = vec![
-            "20250101".to_string(),
-            "150000".to_string(),
-            "20250102".to_string(),
-            "160000".to_string(),
-        ];
-        assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
-            Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
-        );
-    }
-
-    #[test]
-    fn test_last_separated_date_and_time_win() {
-        let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
-        let markers = vec![
-            "20250101".to_string(),
-            "150000".to_string(),
-            "20250102160000".to_string(),
-        ];
-        // The first date (20250101) and first time (150000) should win over the later combined datetime
-        assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
-            Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
-        );
-    }
-
-    #[test]
-    fn test_invalid_date_or_time_markers_are_ignored() {
-        let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
-        let markers = vec![
-            "20251301".to_string(), // invalid month
-            "240000".to_string(),   // invalid hour
-            "20250101".to_string(), // valid
-            "150000".to_string(),   // valid
-        ];
-        assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
-            Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
-        );
-    }
-}
diff --git a/src/localize/mod.rs b/src/localize/mod.rs
deleted file mode 100644
index c8f0441..0000000
--- a/src/localize/mod.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-mod configuration;
-mod datetime;
-mod preconfigured;
-mod shard;
-
-pub use configuration::{
-    merge_dimensions, merge_markers, merge_repository_configuration, merge_single_dimension,
-    merge_single_marker,
-};
-pub use datetime::{
-    extract_date_from_marker, extract_datetime_from_file_name, extract_datetime_from_marker,
-    extract_datetime_from_marker_list, extract_time_from_marker,
-};
-pub use preconfigured::TaskConfiguration;
-pub use shard::{localize_shard, localize_stream_file};
diff --git a/src/localize/preconfigured.rs b/src/localize/preconfigured.rs
deleted file mode 100644
index 99b60cf..0000000
--- a/src/localize/preconfigured.rs
+++ /dev/null
@@ -1,46 +0,0 @@
-use once_cell::sync::Lazy;
-
-use crate::models::{Dimension, Marker, MarkerPlacement, RepositoryConfiguration};
-
-/// Pre-configured repository configuration for task management.
-#[allow(non_upper_case_globals)]
-pub static TaskConfiguration: Lazy<RepositoryConfiguration> = Lazy::new(|| {
-    RepositoryConfiguration::new()
-        .with_dimension(
-            "task",
-            Dimension::new("Task")
-                .with_comment(
-                    "If placed, the given shard is a task. The placement determines the state.",
-                )
-                .with_propagate(false),
-        )
-        .with_dimension(
-            "project",
-            Dimension::new("Project")
-                .with_comment("Project the task is attached to")
-                .with_propagate(true),
-        )
-        .with_marker(
-            "Task",
-            Marker::new("Task").with_placements(vec![
-                MarkerPlacement::new("task").with_value("open"),
-                MarkerPlacement::new("task")
-                    .with_if_with(vec!["Done"])
-                    .with_value("done"),
-                MarkerPlacement::new("task")
-                    .with_if_with(vec!["Waiting"])
-                    .with_value("waiting"),
-                MarkerPlacement::new("task")
-                    .with_if_with(vec!["Cancelled"])
-                    .with_value("cancelled"),
-                MarkerPlacement::new("task")
-                    .with_if_with(vec!["NotDone"])
-                    .with_value("cancelled"),
-            ]),
-        )
-        .with_marker(
-            "WaitingFor",
-            Marker::new("Task")
-                .with_placements(vec![MarkerPlacement::new("task").with_value("waiting")]),
-        )
-});
diff --git a/src/localize/shard.rs b/src/localize/shard.rs
deleted file mode 100644
index 279b8c6..0000000
--- a/src/localize/shard.rs
+++ /dev/null
@@ -1,282 +0,0 @@
-use chrono::{DateTime, Utc};
-use indexmap::{IndexMap, IndexSet};
-
-use crate::error::StreamdError;
-use crate::models::{LocalizedShard, RepositoryConfiguration, Shard, StreamFile};
-
-use super::datetime::{extract_datetime_from_file_name, extract_datetime_from_marker_list};
-
-/// Localize a shard within the repository's coordinate system.
-///
-/// This function:
-/// 1. Extracts datetime from markers
-/// 2. Applies marker placements to determine dimensional position
-/// 3. Propagates dimensional values to children based on dimension configuration
-pub fn localize_shard(
-    shard: &Shard,
-    config: &RepositoryConfiguration,
-    propagated: &IndexMap<String, String>,
-    moment: DateTime<Utc>,
-) -> LocalizedShard {
-    let mut position = propagated.clone();
-    let mut private_position: IndexMap<String, String> = IndexMap::new();
-
-    // Extract datetime from markers
-    let adjusted_moment = extract_datetime_from_marker_list(&shard.markers, moment);
-
-    // Convert markers to a set for if_with checking
-    let marker_set: IndexSet<String> = shard.markers.iter().cloned().collect();
-
-    // Process each marker and its placements
-    for marker in &shard.markers {
-        if let Some(marker_def) = config.markers.get(marker) {
-            for placement in &marker_def.placements {
-                // Check if_with condition
-                if !placement.if_with.is_subset(&marker_set) {
-                    continue;
-                }
-
-                // Get the dimension configuration
-                let dimension = match config.dimensions.get(&placement.dimension) {
-                    Some(d) => d,
-                    None => continue,
-                };
-
-                let value = placement.value.clone().unwrap_or_else(|| marker.clone());
-
-                // Check if we should place the value
-                let should_place = placement.overwrites
-                    || (!position.contains_key(&placement.dimension)
-                        && !private_position.contains_key(&placement.dimension));
-
-                if should_place {
-                    if dimension.propagate {
-                        position.insert(placement.dimension.clone(), value);
-                    } else {
-                        private_position.insert(placement.dimension.clone(), value);
-                    }
-                }
-            }
-        }
-    }
-
-    // Recursively localize children with propagated position
-    let children: Vec<LocalizedShard> = shard
-        .children
-        .iter()
-        .map(|child| localize_shard(child, config, &position, adjusted_moment))
-        .collect();
-
-    // Merge private position into final position
-    position.extend(private_position);
-
-    LocalizedShard {
-        markers: shard.markers.clone(),
-        tags: shard.tags.clone(),
-        start_line: shard.start_line,
-        end_line: shard.end_line,
-        moment: adjusted_moment,
-        location: position,
-        children,
-    }
-}
-
-/// Localize an entire stream file.
-///
-/// Extracts the datetime from the file name and localizes the root shard.
-pub fn localize_stream_file(
-    stream_file: &StreamFile,
-    config: &RepositoryConfiguration,
-) -> Result<LocalizedShard, StreamdError> {
-    let shard_date = extract_datetime_from_file_name(&stream_file.file_name)
-        .ok_or_else(|| StreamdError::DateExtractionError(stream_file.file_name.clone()))?;
-
-    let shard = stream_file
-        .shard
-        .as_ref()
-        .ok_or_else(|| StreamdError::DateExtractionError("No shard in file".to_string()))?;
-
-    let mut initial_location = IndexMap::new();
-    initial_location.insert("file".to_string(), stream_file.file_name.clone());
-
-    Ok(localize_shard(shard, config, &initial_location, shard_date))
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::models::{Dimension, Marker, MarkerPlacement};
-    use chrono::TimeZone;
-
-    fn make_config() -> RepositoryConfiguration {
-        RepositoryConfiguration::new()
-            .with_dimension(
-                "project",
-                Dimension::new("Project")
-                    .with_comment("GTD Project that is being worked on")
-                    .with_propagate(true),
-            )
-            .with_dimension(
-                "moment",
-                Dimension::new("Moment")
-                    .with_comment("Timestamp this entry was created at")
-                    .with_propagate(true),
-            )
-            .with_dimension(
-                "timesheet",
-                Dimension::new("Timesheet")
-                    .with_comment("Time Cards for Time Tracking")
-                    .with_propagate(true),
-            )
-            .with_marker(
-                "Streamd",
-                Marker::new("Streamd").with_placements(vec![
-                    MarkerPlacement::new("project"),
-                    MarkerPlacement::new("timesheet")
-                        .with_if_with(vec!["Timesheet"])
-                        .with_value("coding"),
-                ]),
-            )
-            .with_marker(
-                "JobHunting",
-                Marker::new("JobHunting").with_placements(vec![MarkerPlacement::new("project")]),
-            )
-    }
-
-    #[test]
-    fn test_project_simple_stream_file() {
-        let config = make_config();
-        let stream_file = StreamFile::new("20250622-121000 Test File.md")
-            .with_shard(Shard::new(1, 1).with_markers(vec!["Streamd".to_string()]));
-
-        let result = localize_stream_file(&stream_file, &config).unwrap();
-
-        assert_eq!(
-            result.moment,
-            Utc.with_ymd_and_hms(2025, 6, 22, 12, 10, 0).unwrap()
-        );
-        assert_eq!(result.markers, vec!["Streamd"]);
-        assert_eq!(result.location.get("project"), Some(&"Streamd".to_string()));
-        assert_eq!(
-            result.location.get("file"),
-            Some(&stream_file.file_name.clone())
-        );
-    }
-
-    #[test]
-    fn test_timesheet_use_case() {
-        let config = make_config();
-        let stream_file = StreamFile::new("20260131-210000 Test File.md").with_shard(
-            Shard::new(1, 1).with_markers(vec!["Timesheet".to_string(), "Streamd".to_string()]),
-        );
-
-        let result = localize_stream_file(&stream_file, &config).unwrap();
-
-        assert_eq!(
-            result.moment,
-            Utc.with_ymd_and_hms(2026, 1, 31, 21, 0, 0).unwrap()
-        );
-        assert_eq!(result.location.get("project"), Some(&"Streamd".to_string()));
-        assert_eq!(
-            result.location.get("timesheet"),
-            Some(&"coding".to_string())
-        );
-    }
-
-    #[test]
-    fn test_overwrites_true_propagated_dimension_overwrites_existing_value() {
-        let config = RepositoryConfiguration::new()
-            .with_dimension("project", Dimension::new("Project").with_propagate(true))
-            .with_marker(
-                "A",
-                Marker::new("A")
-                    .with_placements(vec![MarkerPlacement::new("project").with_value("a")]),
-            )
-            .with_marker(
-                "B",
-                Marker::new("B").with_placements(vec![MarkerPlacement::new("project")
-                    .with_value("b")
-                    .with_overwrites(true)]),
-            );
-
-        let stream_file = StreamFile::new("20260131-210000 Test File.md")
-            .with_shard(Shard::new(1, 1).with_markers(vec!["A".to_string(), "B".to_string()]));
-
-        let result = localize_stream_file(&stream_file, &config).unwrap();
-
-        assert_eq!(result.location.get("project"), Some(&"b".to_string()));
-    }
-
-    #[test]
-    fn test_overwrites_false_propagated_dimension_does_not_overwrite_existing_value() {
-        let config = RepositoryConfiguration::new()
-            .with_dimension("project", Dimension::new("Project").with_propagate(true))
-            .with_marker(
-                "A",
-                Marker::new("A")
-                    .with_placements(vec![MarkerPlacement::new("project").with_value("a")]),
-            )
-            .with_marker(
-                "B",
-                Marker::new("B").with_placements(vec![MarkerPlacement::new("project")
-                    .with_value("b")
-                    .with_overwrites(false)]),
-            );
-
-        let stream_file = StreamFile::new("20260131-210000 Test File.md")
-            .with_shard(Shard::new(1, 1).with_markers(vec!["A".to_string(), "B".to_string()]));
-
-        let result = localize_stream_file(&stream_file, &config).unwrap();
-
-        assert_eq!(result.location.get("project"), Some(&"a".to_string()));
-    }
-
-    #[test]
-    fn test_overwrites_true_non_propagated_dimension_overwrites_private_value() {
-        let config = RepositoryConfiguration::new()
-            .with_dimension("label", Dimension::new("Label").with_propagate(false))
-            .with_marker(
-                "A",
-                Marker::new("A")
-                    .with_placements(vec![MarkerPlacement::new("label").with_value("a")]),
-            )
-            .with_marker(
-                "B",
-                Marker::new("B").with_placements(vec![MarkerPlacement::new("label")
-                    .with_value("b")
-                    .with_overwrites(true)]),
-            );
-
-        let stream_file = StreamFile::new("20260131-210000 Test File.md")
-            .with_shard(Shard::new(1, 1).with_markers(vec!["A".to_string(), "B".to_string()]));
-
-        let result = localize_stream_file(&stream_file, &config).unwrap();
-
-        assert_eq!(result.location.get("label"), Some(&"b".to_string()));
-    }
-
-    #[test]
-    fn test_overwrites_false_non_propagated_dimension_does_not_overwrite_private_value() {
-        let config = RepositoryConfiguration::new()
-            .with_dimension("label", Dimension::new("Label").with_propagate(false))
-            .with_marker(
-                "A",
-                Marker::new("A").with_placements(vec![MarkerPlacement::new("label")
-                    .with_value("a")
-                    .with_overwrites(true)]),
-            )
-            .with_marker(
-                "B",
-                Marker::new("B").with_placements(vec![MarkerPlacement::new("label")
-                    .with_value("b")
-                    .with_overwrites(false)]),
-            );
-
-        let stream_file = StreamFile::new("20260131-210000 Test File.md")
-            .with_shard(Shard::new(1, 1).with_markers(vec!["A".to_string(), "B".to_string()]));
-
-        let result = localize_stream_file(&stream_file, &config).unwrap();
-
-        assert_eq!(result.location.get("label"), Some(&"a".to_string()));
-    }
-}
diff --git a/src/main.rs b/src/main.rs
deleted file mode 100644
index d4bfd9e..0000000
--- a/src/main.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-use clap::Parser;
-use streamd::cli::{Cli, Commands};
-
-fn main() -> miette::Result<()> {
-    let cli = Cli::parse();
-
-    match cli.command {
-        Some(Commands::New) => streamd::cli::commands::new::run()?,
-        Some(Commands::Todo) => streamd::cli::commands::todo::run()?,
-        Some(Commands::Edit { number }) => streamd::cli::commands::edit::run(number)?,
-        Some(Commands::Timesheet) => streamd::cli::commands::timesheet::run()?,
-        Some(Commands::Completions { shell }) => {
-            streamd::cli::commands::completions::run(shell);
-        }
-        None => streamd::cli::commands::new::run()?,
-    }
-
-    Ok(())
-}
diff --git a/src/models/dimension.rs b/src/models/dimension.rs
deleted file mode 100644
index 0d32f6b..0000000
--- a/src/models/dimension.rs
+++ /dev/null
@@ -1,42 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-/// A Dimension represents an axis along which shards can be categorized.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct Dimension {
-    /// Human-readable name for display purposes.
-    pub display_name: String,
-
-    /// Optional description of what this dimension represents.
-    #[serde(default)]
-    pub comment: Option<String>,
-
-    /// Whether values in this dimension should propagate to child shards.
-    #[serde(default)]
-    pub propagate: bool,
-
-    /// Tracks whether 'propagate' was explicitly set (for merge semantics).
-    #[serde(skip)]
-    pub propagate_was_set: bool,
-}
-
-impl Dimension {
-    pub fn new(display_name: impl Into<String>) -> Self {
-        Self {
-            display_name: display_name.into(),
-            comment: None,
-            propagate: false,
-            propagate_was_set: false,
-        }
-    }
-
-    pub fn with_comment(mut self, comment: impl Into<String>) -> Self {
-        self.comment = Some(comment.into());
-        self
-    }
-
-    pub fn with_propagate(mut self, propagate: bool) -> Self {
-        self.propagate = propagate;
-        self.propagate_was_set = true;
-        self
-    }
-}
diff --git a/src/models/localized_shard.rs b/src/models/localized_shard.rs
deleted file mode 100644
index 4e6173b..0000000
--- a/src/models/localized_shard.rs
+++ /dev/null
@@ -1,63 +0,0 @@
-use chrono::{DateTime, Utc};
-use indexmap::IndexMap;
-use serde::{Deserialize, Serialize};
-
-/// A LocalizedShard extends a Shard with temporal and dimensional context.
-/// It represents a shard that has been placed within the repository's coordinate system.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct LocalizedShard {
-    /// Markers are tags that appear at the beginning of a line before any content.
-    pub markers: Vec<String>,
-
-    /// Tags are @-prefixed identifiers that appear after content has started.
-    pub tags: Vec<String>,
-
-    /// The starting line number in the source file (1-indexed).
-    pub start_line: usize,
-
-    /// The ending line number in the source file (1-indexed).
-    pub end_line: usize,
-
-    /// The moment in time this shard is associated with.
-    pub moment: DateTime<Utc>,
-
-    /// The dimensional location of this shard (dimension name -> value).
-    pub location: IndexMap<String, String>,
-
-    /// Child shards nested within this shard.
-    pub children: Vec<LocalizedShard>,
-}
-
-impl LocalizedShard {
-    pub fn new(start_line: usize, end_line: usize, moment: DateTime<Utc>) -> Self {
-        Self {
-            markers: Vec::new(),
-            tags: Vec::new(),
-            start_line,
-            end_line,
-            moment,
-            location: IndexMap::new(),
-            children: Vec::new(),
-        }
-    }
-
-    pub fn with_markers(mut self, markers: Vec<String>) -> Self {
-        self.markers = markers;
-        self
-    }
-
-    pub fn with_tags(mut self, tags: Vec<String>) -> Self {
-        self.tags = tags;
-        self
-    }
-
-    pub fn with_location(mut self, location: IndexMap<String, String>) -> Self {
-        self.location = location;
-        self
-    }
-
-    pub fn with_children(mut self, children: Vec<LocalizedShard>) -> Self {
-        self.children = children;
-        self
-    }
-}
diff --git a/src/models/marker.rs b/src/models/marker.rs
deleted file mode 100644
index 8b1cdb1..0000000
--- a/src/models/marker.rs
+++ /dev/null
@@ -1,76 +0,0 @@
-use indexmap::IndexSet;
-use serde::{Deserialize, Serialize};
-
-/// A MarkerPlacement defines how a marker affects dimension values.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct MarkerPlacement {
-    /// Only apply this placement if all markers in `if_with` are also present.
-    #[serde(default)]
-    pub if_with: IndexSet<String>,
-
-    /// The dimension to place a value in.
-    pub dimension: String,
-
-    /// The value to place. If None, uses the marker name itself.
-    #[serde(default)]
-    pub value: Option<String>,
-
-    /// Whether this placement should overwrite existing values in the dimension.
-    #[serde(default = "default_overwrites")]
-    pub overwrites: bool,
-}
-
-fn default_overwrites() -> bool {
-    true
-}
-
-impl MarkerPlacement {
-    pub fn new(dimension: impl Into<String>) -> Self {
-        Self {
-            if_with: IndexSet::new(),
-            dimension: dimension.into(),
-            value: None,
-            overwrites: true,
-        }
-    }
-
-    pub fn with_if_with(mut self, if_with: impl IntoIterator<Item = impl Into<String>>) -> Self {
-        self.if_with = if_with.into_iter().map(Into::into).collect();
-        self
-    }
-
-    pub fn with_value(mut self, value: impl Into<String>) -> Self {
-        self.value = Some(value.into());
-        self
-    }
-
-    pub fn with_overwrites(mut self, overwrites: bool) -> Self {
-        self.overwrites = overwrites;
-        self
-    }
-}
-
-/// A Marker defines how an @-tag should be interpreted for dimensional placement.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct Marker {
-    /// Human-readable name for display purposes.
-    pub display_name: String,
-
-    /// The dimensional placements this marker creates.
-    #[serde(default)]
-    pub placements: Vec<MarkerPlacement>,
-}
-
-impl Marker {
-    pub fn new(display_name: impl Into<String>) -> Self {
-        Self {
-            display_name: display_name.into(),
-            placements: Vec::new(),
-        }
-    }
-
-    pub fn with_placements(mut self, placements: Vec<MarkerPlacement>) -> Self {
-        self.placements = placements;
-        self
-    }
-}
diff --git a/src/models/mod.rs b/src/models/mod.rs
deleted file mode 100644
index 495d980..0000000
--- a/src/models/mod.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-mod dimension;
-mod localized_shard;
-mod marker;
-mod shard;
-mod timecard;
-
-pub use dimension::Dimension;
-pub use localized_shard::LocalizedShard;
-pub use marker::{Marker, MarkerPlacement};
-pub use shard::{RepositoryConfiguration, Shard, StreamFile};
-pub use timecard::{SpecialDayType, Timecard, Timesheet};
diff --git a/src/models/shard.rs b/src/models/shard.rs
deleted file mode 100644
index bf6dd7a..0000000
--- a/src/models/shard.rs
+++ /dev/null
@@ -1,115 +0,0 @@
-use indexmap::IndexMap;
-use serde::{Deserialize, Serialize};
-
-use super::{Dimension, Marker};
-
-/// A Shard represents a section of a markdown file that may contain markers and tags.
-/// Shards form a tree structure where children inherit context from their parents.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct Shard {
-    /// Markers are tags that appear at the beginning of a line before any content.
-    /// They define dimensional placement for the shard.
-    #[serde(default)]
-    pub markers: Vec<String>,
-
-    /// Tags are @-prefixed identifiers that appear after content has started.
-    /// They are informational but don't affect dimensional placement.
-    #[serde(default)]
-    pub tags: Vec<String>,
-
-    /// The starting line number in the source file (1-indexed).
-    pub start_line: usize,
-
-    /// The ending line number in the source file (1-indexed).
-    pub end_line: usize,
-
-    /// Child shards nested within this shard.
-    #[serde(default)]
-    pub children: Vec<Shard>,
-}
-
-impl Shard {
-    pub fn new(start_line: usize, end_line: usize) -> Self {
-        Self {
-            markers: Vec::new(),
-            tags: Vec::new(),
-            start_line,
-            end_line,
-            children: Vec::new(),
-        }
-    }
-
-    pub fn with_markers(mut self, markers: Vec<String>) -> Self {
-        self.markers = markers;
-        self
-    }
-
-    pub fn with_tags(mut self, tags: Vec<String>) -> Self {
-        self.tags = tags;
-        self
-    }
-
-    pub fn with_children(mut self, children: Vec<Shard>) -> Self {
-        self.children = children;
-        self
-    }
-}
-
-/// A StreamFile represents a parsed markdown file with its associated shard tree.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct StreamFile {
-    /// The file name or path of the source file.
-    pub file_name: String,
-
-    /// The root shard representing the entire file's content structure.
-    pub shard: Option<Shard>,
-}
-
-impl StreamFile {
-    pub fn new(file_name: impl Into<String>) -> Self {
-        Self {
-            file_name: file_name.into(),
-            shard: None,
-        }
-    }
-
-    pub fn with_shard(mut self, shard: Shard) -> Self {
-        self.shard = Some(shard);
-        self
-    }
-}
-
-/// Repository configuration defines the dimensions and markers used to organize shards.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct RepositoryConfiguration {
-    /// Dimensions define the axes along which shards can be positioned.
-    pub dimensions: IndexMap<String, Dimension>,
-
-    /// Markers define how @-tags map to dimension placements.
-    pub markers: IndexMap<String, Marker>,
-}
-
-impl RepositoryConfiguration {
-    pub fn new() -> Self {
-        Self {
-            dimensions: IndexMap::new(),
-            markers: IndexMap::new(),
-        }
-    }
-
-    pub fn with_dimension(mut self, name: impl Into<String>, dimension: Dimension) -> Self {
-        self.dimensions.insert(name.into(), dimension);
-        self
-    }
-
-    pub fn with_marker(mut self, name: impl Into<String>, marker: Marker) -> Self {
-        self.markers.insert(name.into(), marker);
-        self
-    }
-}
-
-impl Default for RepositoryConfiguration {
-    fn default() -> Self {
-        Self::new()
-    }
-}
diff --git a/src/models/timecard.rs b/src/models/timecard.rs
deleted file mode 100644
index a87dd19..0000000
--- a/src/models/timecard.rs
+++ /dev/null
@@ -1,77 +0,0 @@
-use chrono::NaiveDate;
-use chrono::NaiveTime;
-use serde::{Deserialize, Serialize};
-
-/// Type of special day that affects timesheet calculations.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
-pub enum SpecialDayType {
-    #[serde(rename = "VACATION")]
-    Vacation,
-    #[serde(rename = "UNDERTIME")]
-    Undertime,
-    #[serde(rename = "HOLIDAY")]
-    Holiday,
-    #[serde(rename = "WEEKEND")]
-    Weekend,
-}
-
-impl std::fmt::Display for SpecialDayType {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            SpecialDayType::Vacation => write!(f, "VACATION"),
-            SpecialDayType::Undertime => write!(f, "UNDERTIME"),
-            SpecialDayType::Holiday => write!(f, "HOLIDAY"),
-            SpecialDayType::Weekend => write!(f, "WEEKEND"),
-        }
-    }
-}
-
-/// A Timecard represents a single work period with start and end times.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct Timecard {
-    pub from_time: NaiveTime,
-    pub to_time: NaiveTime,
-}
-
-impl Timecard {
-    pub fn new(from_time: NaiveTime, to_time: NaiveTime) -> Self {
-        Self { from_time, to_time }
-    }
-}
-
-/// A Timesheet aggregates all time tracking information for a single day.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct Timesheet {
-    pub date: NaiveDate,
-    #[serde(default)]
-    pub is_sick_leave: bool,
-    #[serde(default)]
-    pub special_day_type: Option<SpecialDayType>,
-    pub timecards: Vec<Timecard>,
-}
-
-impl Timesheet {
-    pub fn new(date: NaiveDate) -> Self {
-        Self {
-            date,
-            is_sick_leave: false,
-            special_day_type: None,
-            timecards: Vec::new(),
-        }
-    }
-
-    pub fn with_sick_leave(mut self, is_sick_leave: bool) -> Self {
-        self.is_sick_leave = is_sick_leave;
-        self
-    }
-
-    pub fn with_special_day_type(mut self, special_day_type: SpecialDayType) -> Self {
-        self.special_day_type = Some(special_day_type);
-        self
-    }
-
-    pub fn with_timecards(mut self, timecards: Vec<Timecard>) -> Self {
-        self.timecards = timecards;
-        self
-    }
-}
diff --git a/src/query/find.rs b/src/query/find.rs
deleted file mode 100644
index c06e117..0000000
--- a/src/query/find.rs
+++ /dev/null
@@ -1,209 +0,0 @@
-use crate::models::LocalizedShard;
-
-/// Find all shards matching a predicate, recursively searching through children.
-///
-/// The search is depth-first, with the parent tested before its children.
-pub fn find_shard<F>(shards: &[LocalizedShard], predicate: F) -> Vec<LocalizedShard>
-where
-    F: Fn(&LocalizedShard) -> bool + Copy,
-{
-    let mut found_shards = Vec::new();
-
-    for shard in shards {
-        if predicate(shard) {
-            found_shards.push(shard.clone());
-        }
-        found_shards.extend(find_shard(&shard.children, predicate));
-    }
-
-    found_shards
-}
-
-/// Find all shards where a specific dimension has a specific value.
-pub fn find_shard_by_position(
-    shards: &[LocalizedShard],
-    dimension: &str,
-    value: &str,
-) -> Vec<LocalizedShard> {
-    find_shard(shards, |shard| {
-        shard
-            .location
-            .get(dimension)
-            .map(|v| v == value)
-            .unwrap_or(false)
-    })
-}
-
-/// Find all shards where a specific dimension is set (regardless of value).
-pub fn find_shard_by_set_dimension(
-    shards: &[LocalizedShard],
-    dimension: &str,
-) -> Vec<LocalizedShard> {
-    find_shard(shards, |shard| shard.location.contains_key(dimension))
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use chrono::{TimeZone, Utc};
-    use indexmap::IndexMap;
-
-    fn generate_localized_shard(
-        location: Option<IndexMap<String, String>>,
-        children: Option<Vec<LocalizedShard>>,
-    ) -> LocalizedShard {
-        LocalizedShard {
-            start_line: 1,
-            end_line: 1,
-            moment: Utc.with_ymd_and_hms(2020, 1, 1, 0, 0, 0).unwrap(),
-            location: location.unwrap_or_default(),
-            children: children.unwrap_or_default(),
-            markers: vec![],
-            tags: vec![],
-        }
-    }
-
-    #[test]
-    fn test_returns_empty_when_no_match() {
-        let mut loc = IndexMap::new();
-        loc.insert("file".to_string(), "a.md".to_string());
-        let root = generate_localized_shard(Some(loc), None);
-        let shards = vec![root];
-
-        let result = find_shard(&shards, |s| s.location.contains_key("missing"));
-
-        assert!(result.is_empty());
-    }
-
-    #[test]
-    fn test_finds_matches_depth_first_and_preserves_order() {
-        let mut loc1 = IndexMap::new();
-        loc1.insert("k".to_string(), "match".to_string());
-        let grandchild = generate_localized_shard(Some(loc1.clone()), None);
-
-        let child1 = generate_localized_shard(Some(loc1), Some(vec![grandchild.clone()]));
-
-        let mut loc2 = IndexMap::new();
-        loc2.insert("k".to_string(), "nope".to_string());
-        let child2 = generate_localized_shard(Some(loc2.clone()), None);
-
-        let root = generate_localized_shard(Some(loc2), Some(vec![child1.clone(), child2]));
-
-        let result = find_shard(&[root], |s| {
-            s.location.get("k") == Some(&"match".to_string())
-        });
-
-        assert_eq!(result.len(), 2);
-        assert_eq!(result[0], child1);
-        assert_eq!(result[1], grandchild);
-    }
-
-    #[test]
-    fn test_includes_root_if_it_matches() {
-        let mut loc = IndexMap::new();
-        loc.insert("k".to_string(), "match".to_string());
-
-        let child = generate_localized_shard(Some(loc.clone()), None);
-        let root = generate_localized_shard(Some(loc), Some(vec![child]));
-
-        let result = find_shard(std::slice::from_ref(&root), |s| {
-            s.location.get("k") == Some(&"match".to_string())
-        });
-
-        assert_eq!(result[0], root);
-        assert_eq!(result.len(), 2);
-    }
-
-    #[test]
-    fn test_multiple_roots_keeps_left_to_right_order() {
-        let mut loc_match = IndexMap::new();
-        loc_match.insert("k".to_string(), "match".to_string());
-
-        let mut loc_nope = IndexMap::new();
-        loc_nope.insert("k".to_string(), "nope".to_string());
-
-        let a = generate_localized_shard(Some(loc_match.clone()), None);
-        let b = generate_localized_shard(Some(loc_match), None);
-        let c = generate_localized_shard(Some(loc_nope), None);
-
-        let result = find_shard(&[a.clone(), b.clone(), c], |s| {
-            s.location.get("k") == Some(&"match".to_string())
-        });
-
-        assert_eq!(result, vec![a, b]);
-    }
-
-    #[test]
-    fn test_query_function_can_use_arbitrary_logic() {
-        let mut loc1 = IndexMap::new();
-        loc1.insert("x".to_string(), "1".to_string());
-
-        let mut loc2 = IndexMap::new();
-        loc2.insert("x".to_string(), "2".to_string());
-
-        let mut loc3 = IndexMap::new();
-        loc3.insert("x".to_string(), "3".to_string());
-
-        let a = generate_localized_shard(Some(loc1), None);
-        let b = generate_localized_shard(Some(loc2), None);
-        let c = generate_localized_shard(Some(loc3), None);
-        let root = generate_localized_shard(None, Some(vec![a, b.clone(), c]));
-
-        let result = find_shard(&[root], |shard| {
-            shard
-                .location
-                .get("x")
-                .and_then(|x| x.parse::<i32>().ok())
-                .map(|x| x % 2 == 0)
-                .unwrap_or(false)
-        });
-
-        assert_eq!(result, vec![b]);
-    }
-
-    #[test]
-    fn test_matches_only_when_dimension_present_and_equal() {
-        let mut loc_match = IndexMap::new();
-        loc_match.insert("file".to_string(), "a.md".to_string());
-        loc_match.insert("line".to_string(), "10".to_string());
-
-        let mut loc_wrong = IndexMap::new();
-        loc_wrong.insert("file".to_string(), "a.md".to_string());
-        loc_wrong.insert("line".to_string(), "11".to_string());
-
-        let mut loc_missing = IndexMap::new();
-        loc_missing.insert("file".to_string(), "a.md".to_string());
-
-        let match_shard = generate_localized_shard(Some(loc_match), None);
-        let wrong_value = generate_localized_shard(Some(loc_wrong), None);
-        let missing_dim = generate_localized_shard(Some(loc_missing), None);
-
-        let mut root_loc = IndexMap::new();
-        root_loc.insert("root".to_string(), "x".to_string());
-        let root = generate_localized_shard(
-            Some(root_loc),
-            Some(vec![match_shard.clone(), wrong_value, missing_dim]),
-        );
-
-        let result = find_shard_by_position(&[root], "line", "10");
-
-        assert_eq!(result, vec![match_shard]);
-    }
-
-    #[test]
-    fn test_recurses_through_children() {
-        let mut loc_deep = IndexMap::new();
-        loc_deep.insert("section".to_string(), "s1".to_string());
-        let deep = generate_localized_shard(Some(loc_deep), None);
-
-        let mut loc_mid = IndexMap::new();
-        loc_mid.insert("section".to_string(), "s0".to_string());
-        let mid = generate_localized_shard(Some(loc_mid), Some(vec![deep.clone()]));
-
-        let root = generate_localized_shard(None, Some(vec![mid]));
-
-        let result = find_shard_by_position(&[root], "section", "s1");
-
-        assert_eq!(result, vec![deep]);
-    }
-}
diff --git a/src/query/mod.rs b/src/query/mod.rs
deleted file mode 100644
index 9d9424d..0000000
--- a/src/query/mod.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-mod find;
-
-pub use find::{find_shard, find_shard_by_position, find_shard_by_set_dimension};
diff --git a/src/streamer/__init__.py b/src/streamer/__init__.py
new file mode 100644
index 0000000..6109ca8
--- /dev/null
+++ b/src/streamer/__init__.py
@@ -0,0 +1,126 @@
+import glob
+import os
+from datetime import datetime
+from shutil import move
+from typing import Annotated, Generator
+
+import click
+import typer
+from rich import print
+from rich.markdown import Markdown
+from rich.panel import Panel
+
+from streamer.localize import (
+    LocalizedShard,
+    RepositoryConfiguration,
+    localize_stream_file,
+)
+from streamer.localize.preconfigured_configurations import TaskConfiguration
+from streamer.parse import parse_markdown_file
+from streamer.query import find_shard_by_position
+from streamer.query.find import find_shard_by_set_dimension
+from streamer.settings import Settings
+from streamer.timesheet.configuration import BasicTimesheetConfiguration
+from streamer.timesheet.extract import extract_timesheets
+
+app = typer.Typer()
+
+
+def all_files(config: RepositoryConfiguration) -> Generator[LocalizedShard]:
+    for file_name in glob.glob(f"{glob.escape(Settings().base_folder)}/*.md"):
+        with open(file_name, "r") as file:
+            file_content = file.read()
+            if shard := localize_stream_file(
+                parse_markdown_file(file_name, file_content), config
+            ):
+                yield shard
+
+
+@app.command()
+def todo() -> None:
+    all_shards = list(all_files(TaskConfiguration))
+
+    for task_shard in find_shard_by_position(all_shards, "task", "open"):
+        with open(task_shard.location["file"], "r") as file:
+            file_content = file.read().splitlines()
+            print(
+                Panel(
+                    Markdown(
+                        "\n".join(
+                            file_content[
+                                task_shard.start_line - 1 : task_shard.end_line
+                            ]
+                        )
+                    ),
+                    title=f"{task_shard.location['file']}:{task_shard.start_line}",
+                )
+            )
+
+
+@app.command()
+def edit(number: Annotated[int, typer.Argument()] = 1) -> None:
+    all_shards = list(all_files(TaskConfiguration))
+    sorted_shards = sorted(all_shards, key=lambda s: s.moment)
+
+    if abs(number) >= len(sorted_shards):
+        raise ValueError("Argument out of range")
+
+    selected_number = number
+    if selected_number >= 0:
+        selected_number = len(sorted_shards) - selected_number
+    else:
+        selected_number = -selected_number
+
+    click.edit(None, filename=sorted_shards[selected_number].location["file"])
+
+
+@app.command()
+def timesheet() -> None:
+    all_shards = list(all_files(BasicTimesheetConfiguration))
+    sheets = sorted(extract_timesheets(all_shards), key=lambda card: card.date)
+    for sheet in sheets:
+        print(sheet.date)
+        print(
+            ",".join(
+                map(lambda card: f"{card.from_time},{card.to_time}", sheet.timecards)
+            ),
+        )
+
+
+@app.command()
+def new() -> None:
+    streamer_directory = Settings().base_folder
+
+    timestamp = datetime.now().strftime("%Y%m%d-%H%M%S")
+    preliminary_file_name = f"{timestamp}_wip.md"
+    prelimary_path = os.path.join(streamer_directory, preliminary_file_name)
+
+    content = "# "
+    with open(prelimary_path, "w") as file:
+        _ = file.write(content)
+
+    click.edit(None, filename=prelimary_path)
+
+    with open(prelimary_path, "r") as file:
+        content = file.read()
+    parsed_content = parse_markdown_file(prelimary_path, content)
+
+    final_file_name = f"{timestamp}.md"
+    if parsed_content.shard is not None and len(
+        markers := parsed_content.shard.markers
+    ):
+        final_file_name = f"{timestamp} {' '.join(markers)}.md"
+
+    final_path = os.path.join(streamer_directory, final_file_name)
+    _ = move(prelimary_path, final_path)
+    print(f"Saved as [yellow]{final_file_name}")
+
+
+@app.callback(invoke_without_command=True)
+def main(ctx: typer.Context):
+    if ctx.invoked_subcommand is None:
+        new()
+
+
+if __name__ == "__main__":
+    app()
diff --git a/src/streamer/localize/__init__.py b/src/streamer/localize/__init__.py
new file mode 100644
index 0000000..97456a2
--- /dev/null
+++ b/src/streamer/localize/__init__.py
@@ -0,0 +1,9 @@
+from .localize import localize_stream_file
+from .localized_shard import LocalizedShard
+from .repository_configuration import RepositoryConfiguration
+
+__all__ = [
+    "RepositoryConfiguration",
+    "localize_stream_file",
+    "LocalizedShard",
+]
diff --git a/src/streamer/localize/extract_datetime.py b/src/streamer/localize/extract_datetime.py
new file mode 100644
index 0000000..df15935
--- /dev/null
+++ b/src/streamer/localize/extract_datetime.py
@@ -0,0 +1,92 @@
+import os
+import re
+from datetime import date, datetime, time
+
+
+def extract_datetime_from_file_name(file_name: str) -> datetime | None:
+    FILE_NAME_REGEX = r"^(?P<date>\d{8})(?:-(?P<time>\d{4,6}))?.+.md$"
+    base_name = os.path.basename(file_name)
+    match = re.match(FILE_NAME_REGEX, base_name)
+
+    if match:
+        date_str = match.group("date")
+        time_str = match.group("time") or ""
+        time_str = time_str.ljust(6, "0")
+        datetime_str = f"{date_str} {time_str[:2]}:{time_str[2:4]}:{time_str[4:]}"
+        return datetime.strptime(datetime_str, "%Y%m%d %H:%M:%S")
+    return None
+
+
+def extract_datetime_from_marker(marker: str) -> datetime | None:
+    """
+    Extract a datetime from a marker string in the exact format: YYYYMMDDHHMMSS.
+
+    Returns:
+        Parsed datetime if the format is fulfilled and values are valid, else None.
+    """
+    if not re.fullmatch(r"\d{14}", marker or ""):
+        return None
+    try:
+        return datetime.strptime(marker, "%Y%m%d%H%M%S")
+    except ValueError:
+        return None
+
+
+def extract_date_from_marker(marker: str) -> date | None:
+    """
+    Extract a date from a marker string in the exact format: YYYYMMDD.
+
+    Returns:
+        Parsed date if the format is fulfilled and values are valid, else None.
+    """
+    if not re.fullmatch(r"\d{8}", marker or ""):
+        return None
+    try:
+        return datetime.strptime(marker, "%Y%m%d").date()
+    except ValueError:
+        return None
+
+
+def extract_time_from_marker(marker: str) -> time | None:  # noqa: F821
+    """
+    Extract a time from a marker string in the exact format: HHMMSS.
+
+    Returns:
+        Parsed time if the format is fulfilled and values are valid, else None.
+    """
+    if not re.fullmatch(r"\d{6}", marker or ""):
+        return None
+    try:
+        return datetime.strptime(marker, "%H%M%S").time()
+    except ValueError:
+        return None
+
+
+def extract_datetime_from_marker_list(markers: list[str], inherited_datetime: datetime):
+    shard_time: time | None = None
+    shard_date: date | None = None
+
+    for marker in markers[::-1]:
+        if parsed_time := extract_time_from_marker(marker):
+            shard_time = parsed_time
+        if parsed_date := extract_date_from_marker(marker):
+            shard_date = parsed_date
+        if parsed_datetime := extract_datetime_from_marker(marker):
+            shard_date = parsed_datetime.date()
+            shard_time = parsed_datetime.time()
+
+    if shard_date and not shard_time:
+        return datetime.combine(shard_date, time(0, 0, 0))
+
+    return datetime.combine(
+        shard_date or inherited_datetime.date(), shard_time or inherited_datetime.time()
+    )
+
+
+__all__ = [
+    "extract_datetime_from_file_name",
+    "extract_datetime_from_marker",
+    "extract_date_from_marker",
+    "extract_time_from_marker",
+    "extract_datetime_from_marker_list",
+]
diff --git a/src/streamer/localize/localize.py b/src/streamer/localize/localize.py
new file mode 100644
index 0000000..b241fc9
--- /dev/null
+++ b/src/streamer/localize/localize.py
@@ -0,0 +1,70 @@
+from datetime import datetime
+
+from streamer.parse.shard import Shard, StreamFile
+
+from .extract_datetime import (
+    extract_datetime_from_file_name,
+    extract_datetime_from_marker_list,
+)
+from .localized_shard import LocalizedShard
+from .repository_configuration import RepositoryConfiguration
+
+
+def localize_shard(
+    shard: Shard,
+    config: RepositoryConfiguration,
+    propagated: dict[str, str],
+    moment: datetime,
+) -> LocalizedShard:
+    position = {**propagated}
+    private_position: dict[str, str] = {}
+
+    adjusted_moment: datetime = extract_datetime_from_marker_list(shard.markers, moment)
+
+    for marker in shard.markers:
+        if marker in config.markers:
+            marker_definition = config.markers[marker]
+            for placement in marker_definition.placements:
+                if placement.if_with <= set(shard.markers):
+                    dimension = config.dimensions[placement.dimension]
+
+                    value = placement.value or marker
+
+                    if placement.overwrites or (
+                        placement.dimension not in position
+                        and placement.dimension not in private_position
+                    ):
+                        if dimension.propagate:
+                            position[placement.dimension] = value
+                        else:
+                            private_position[placement.dimension] = value
+
+    children = [
+        localize_shard(child, config, position, adjusted_moment)
+        for child in shard.children
+    ]
+
+    position.update(private_position)
+
+    return LocalizedShard(
+        **shard.model_dump(exclude={"children"}),
+        location=position,
+        children=children,
+        moment=adjusted_moment,
+    )
+
+
+def localize_stream_file(
+    stream_file: StreamFile, config: RepositoryConfiguration
+) -> LocalizedShard | None:
+    shard_date = extract_datetime_from_file_name(stream_file.file_name)
+
+    if not shard_date or not stream_file.shard:
+        raise ValueError("Could not extract date")
+
+    return localize_shard(
+        stream_file.shard, config, {"file": stream_file.file_name}, shard_date
+    )
+
+
+__all__ = ["localize_stream_file"]
diff --git a/src/streamer/localize/localized_shard.py b/src/streamer/localize/localized_shard.py
new file mode 100644
index 0000000..05cb016
--- /dev/null
+++ b/src/streamer/localize/localized_shard.py
@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from streamer.parse.shard import Shard
+
+
+class LocalizedShard(Shard):
+    moment: datetime
+    location: dict[str, str]
+    children: list[LocalizedShard] = []  # pyright: ignore[reportIncompatibleVariableOverride]
+
+
+__all__ = ["LocalizedShard"]
diff --git a/src/streamer/localize/preconfigured_configurations.py b/src/streamer/localize/preconfigured_configurations.py
new file mode 100644
index 0000000..0da82d7
--- /dev/null
+++ b/src/streamer/localize/preconfigured_configurations.py
@@ -0,0 +1,43 @@
+from streamer.localize.repository_configuration import (
+    Dimension,
+    Marker,
+    MarkerPlacement,
+    RepositoryConfiguration,
+)
+
+TaskConfiguration = RepositoryConfiguration(
+    dimensions={
+        "task": Dimension(
+            display_name="Task",
+            comment="If placed, the given shard is a task. The placement determines the state.",
+            propagate=False,
+        ),
+        "project": Dimension(
+            display_name="Project",
+            comment="Project the task is attached to",
+            propagate=True,
+        ),
+    },
+    markers={
+        "Task": Marker(
+            display_name="Task",
+            placements=[
+                MarkerPlacement(dimension="task", value="open"),
+                MarkerPlacement(if_with={"Done"}, dimension="task", value="done"),
+                MarkerPlacement(if_with={"Waiting"}, dimension="task", value="waiting"),
+                MarkerPlacement(
+                    if_with={"Cancelled"}, dimension="task", value="cancelled"
+                ),
+                MarkerPlacement(
+                    if_with={"NotDone"}, dimension="task", value="cancelled"
+                ),
+            ],
+        ),
+        "WaitingFor": Marker(
+            display_name="Task",
+            placements=[
+                MarkerPlacement(dimension="task", value="waiting"),
+            ],
+        ),
+    },
+)
diff --git a/src/streamer/localize/repository_configuration.py b/src/streamer/localize/repository_configuration.py
new file mode 100644
index 0000000..f21c556
--- /dev/null
+++ b/src/streamer/localize/repository_configuration.py
@@ -0,0 +1,108 @@
+from __future__ import annotations
+
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class Dimension(BaseModel):
+    display_name: str
+    comment: Optional[str] = None
+    propagate: bool = False
+
+
+class MarkerPlacement(BaseModel):
+    if_with: set[str] = set()
+    dimension: str
+    value: str | None = None
+    overwrites: bool = True
+
+
+class Marker(BaseModel):
+    display_name: str
+    placements: list[MarkerPlacement] = []
+
+
+class RepositoryConfiguration(BaseModel):
+    dimensions: dict[str, Dimension]
+    markers: dict[str, Marker]
+
+
+def merge_single_dimension(base: Dimension, second: Dimension) -> Dimension:
+    second_fields_set = getattr(second, "model_fields_set", set())
+
+    return Dimension(
+        display_name=second.display_name or base.display_name,
+        comment=base.comment if second.comment is None else second.comment,
+        propagate=second.propagate
+        if "propagate" in second_fields_set
+        else base.propagate,
+    )
+
+
+def merge_dimensions(
+    base: dict[str, Dimension], second: dict[str, Dimension]
+) -> dict[str, Dimension]:
+    merged: dict[str, Dimension] = dict(base)
+    for key, second_dimension in second.items():
+        if key in merged:
+            merged[key] = merge_single_dimension(merged[key], second_dimension)
+        else:
+            merged[key] = second_dimension
+    return merged
+
+
+def _placement_identity(p: MarkerPlacement) -> tuple[frozenset[str], str]:
+    return (frozenset(p.if_with), p.dimension)
+
+
+def merge_single_marker(base: Marker, second: Marker) -> Marker:
+    merged_display_name = second.display_name or base.display_name
+
+    merged_placements: list[MarkerPlacement] = []
+    seen: dict[tuple[frozenset[str], str], int] = {}
+
+    for placement in base.placements:
+        ident = _placement_identity(placement)
+        seen[ident] = len(merged_placements)
+        merged_placements.append(placement)
+
+    for placement in second.placements:
+        ident = _placement_identity(placement)
+        if ident in seen:
+            merged_placements[seen[ident]] = placement
+        else:
+            seen[ident] = len(merged_placements)
+            merged_placements.append(placement)
+
+    return Marker(display_name=merged_display_name, placements=merged_placements)
+
+
+def merge_markers(
+    base: dict[str, Marker], second: dict[str, Marker]
+) -> dict[str, Marker]:
+    merged: dict[str, Marker] = dict(base)
+    for key, second_marker in second.items():
+        if key in merged:
+            merged[key] = merge_single_marker(merged[key], second_marker)
+        else:
+            merged[key] = second_marker
+    return merged
+
+
+def merge_repository_configuration(
+    base: RepositoryConfiguration, second: RepositoryConfiguration
+) -> RepositoryConfiguration:
+    return RepositoryConfiguration(
+        dimensions=merge_dimensions(base.dimensions, second.dimensions),
+        markers=merge_markers(base.markers, second.markers),
+    )
+
+
+__all__ = [
+    "Dimension",
+    "Marker",
+    "MarkerPlacement",
+    "RepositoryConfiguration",
+    "merge_repository_configuration",
+]
diff --git a/src/streamer/parse/__init__.py b/src/streamer/parse/__init__.py
new file mode 100644
index 0000000..9b2d2c0
--- /dev/null
+++ b/src/streamer/parse/__init__.py
@@ -0,0 +1,4 @@
+from .shard import Shard, StreamFile
+from .parse import parse_markdown_file
+
+__all__ = ["Shard", "StreamFile", "parse_markdown_file"]
diff --git a/src/streamer/parse/extract_tag.py b/src/streamer/parse/extract_tag.py
new file mode 100644
index 0000000..ace1258
--- /dev/null
+++ b/src/streamer/parse/extract_tag.py
@@ -0,0 +1,84 @@
+import re
+from typing import Iterable
+from mistletoe.block_token import BlockToken
+from mistletoe.span_token import Emphasis, RawText, Strikethrough, Strong, Link
+from mistletoe.token import Token
+
+from .markdown_tag import Tag
+
+
+def extract_markers_and_tags_from_single_token(
+    token: Token,
+    marker_boundary_encountered: bool,
+    return_at_first_marker: bool = False,
+) -> tuple[list[str], list[str], bool]:
+    result_markers, result_tags = [], []
+    result_marker_boundary_encountered = marker_boundary_encountered
+
+    if isinstance(token, Tag):
+        if marker_boundary_encountered:
+            result_tags.append(token.content)
+        else:
+            result_markers.append(token.content)
+    elif isinstance(token, (Emphasis, Strong, Strikethrough, Link)):
+        markers, tags, child_marker_boundary_encountered = (
+            extract_markers_and_tags_from_tokens(
+                token.children or [],
+                marker_boundary_encountered,
+                return_at_first_marker,
+            )
+        )
+        result_markers.extend(markers)
+        result_tags.extend(tags)
+        result_marker_boundary_encountered = (
+            marker_boundary_encountered or child_marker_boundary_encountered
+        )
+    elif isinstance(token, RawText) and re.match(r"^[\s]*$", token.content):
+        pass
+    else:
+        result_marker_boundary_encountered = True
+
+    return result_markers, result_tags, result_marker_boundary_encountered
+
+
+def extract_markers_and_tags_from_tokens(
+    tokens: Iterable[Token],
+    marker_boundary_encountered: bool,
+    return_at_first_marker: bool = False,
+) -> tuple[list[str], list[str], bool]:
+    result_markers, result_tags = [], []
+    result_marker_boundary_encountered = marker_boundary_encountered
+
+    for child in tokens:
+        markers, tags, child_marker_boundary_encountered = (
+            extract_markers_and_tags_from_single_token(
+                child, result_marker_boundary_encountered, return_at_first_marker
+            )
+        )
+        result_markers.extend(markers)
+        result_tags.extend(tags)
+        result_marker_boundary_encountered = (
+            marker_boundary_encountered or child_marker_boundary_encountered
+        )
+
+        if len(result_markers) > 0 and return_at_first_marker:
+            break
+
+    return result_markers, result_tags, result_marker_boundary_encountered
+
+
+def extract_markers_and_tags(block_token: BlockToken) -> tuple[list[str], list[str]]:
+    markers, tags, _ = extract_markers_and_tags_from_tokens(
+        block_token.children or [], False
+    )
+    return markers, tags
+
+
+def has_markers(block_token: BlockToken) -> bool:
+    markers, _, _ = extract_markers_and_tags_from_tokens(
+        block_token.children or [], False, return_at_first_marker=True
+    )
+    return len(markers) > 0
+
+
+__all__ = ["extract_markers_and_tags", "has_markers"]
diff --git a/src/streamer/parse/list.py b/src/streamer/parse/list.py
new file mode 100644
index 0000000..730ea35
--- /dev/null
+++ b/src/streamer/parse/list.py
@@ -0,0 +1,13 @@
+from itertools import pairwise
+from typing import TypeVar
+
+A = TypeVar("A")
+
+
+def split_at(list_to_be_split: list[A], positions: list[int]):
+    positions = sorted(set([0, *positions, len(list_to_be_split)]))
+
+    return [list_to_be_split[left:right] for left, right in pairwise(positions)]
+
+
+__all__ = ["split_at"]
diff --git a/src/streamer/parse/markdown_tag.py b/src/streamer/parse/markdown_tag.py
new file mode 100644
index 0000000..4de6d35
--- /dev/null
+++ b/src/streamer/parse/markdown_tag.py
@@ -0,0 +1,20 @@
+import re
+from mistletoe.markdown_renderer import Fragment, MarkdownRenderer
+from mistletoe.span_token import SpanToken
+
+
+class Tag(SpanToken):
+    parse_inner = False
+    pattern = re.compile(r"@([^\s*\x60~\[\]]+)")
+
+
+class TagMarkdownRenderer(MarkdownRenderer):
+    def __init__(self):
+        super().__init__(Tag)
+
+    def render_tag(self, token: Tag):
+        yield Fragment("@")
+        yield Fragment(token.content)
+
+
+__all__ = ["Tag", "TagMarkdownRenderer"]
diff --git a/src/streamer/parse/parse.py b/src/streamer/parse/parse.py
new file mode 100644
index 0000000..058912a
--- /dev/null
+++ b/src/streamer/parse/parse.py
@@ -0,0 +1,242 @@
+from collections import Counter
+
+from mistletoe.block_token import (
+    BlockToken,
+    Document,
+    Heading,
+    List,
+    ListItem,
+    Paragraph,
+)
+
+from .extract_tag import extract_markers_and_tags, has_markers
+from .list import split_at
+from .markdown_tag import TagMarkdownRenderer
+from .shard import Shard, StreamFile
+
+
+def get_line_number(block_token: BlockToken) -> int:
+    return block_token.line_number  # type: ignore
+
+
+def build_shard(
+    start_line: int,
+    end_line: int,
+    markers: list[str] = [],
+    tags: list[str] = [],
+    children: list[Shard] = [],
+) -> Shard:
+    if (
+        len(children) == 1
+        and len(tags) == 0
+        and len(markers) == 0
+        and children[0].start_line == start_line
+        and children[0].end_line == end_line
+    ):
+        return children[0]
+
+    return Shard(
+        markers=markers,
+        tags=tags,
+        children=children,
+        start_line=start_line,
+        end_line=end_line,
+    )
+
+
+def merge_into_first_shard(
+    shards: list[Shard], start_line: int, end_line: int, additional_tags: list[str] = []
+):
+    return shards[0].model_copy(
+        update={
+            "start_line": start_line,
+            "end_line": end_line,
+            "children": shards[1:],
+            "tags": shards[0].tags + additional_tags,
+        }
+    )
+
+
+def find_paragraph_shard_positions(block_tokens: list[BlockToken]) -> list[int]:
+    return [
+        index
+        for index, block_token in enumerate(block_tokens)
+        if isinstance(block_token, Paragraph) and has_markers(block_token)
+    ]
+
+
+def find_headings_by_level(
+    block_tokens: list[BlockToken], header_level: int
+) -> list[int]:
+    return [
+        index
+        for index, block_token in enumerate(block_tokens)
+        if isinstance(block_token, Heading) and block_token.level == header_level
+    ]
+
+
+def calculate_heading_level_for_next_split(
+    block_tokens: list[BlockToken],
+) -> int | None:
+    """
+    If there is no marker in any heading, then return None.
+    If only the first token is a heading with a marker, then return None.
+    Otherwise: Return the heading level with the lowest level (h1 < h2), of which there are two or which has a marker (and doesn't stem from first)
+    """
+    level_of_headings_without_first_with_marker = [
+        token.level
+        for token in block_tokens[1:]
+        if isinstance(token, Heading) and has_markers(token)
+    ]
+
+    if len(level_of_headings_without_first_with_marker) == 0:
+        return None
+
+    heading_level_counter = Counter(
+        [token.level for token in block_tokens if isinstance(token, Heading)]
+    )
+
+    return min(
+        [level for level, count in heading_level_counter.items() if count >= 2]
+        + level_of_headings_without_first_with_marker
+    )
+
+
+def parse_single_block_shards(
+    block_token: BlockToken, start_line: int, end_line: int
+) -> tuple[Shard | None, list[str]]:
+    markers, tags, children = [], [], []
+
+    if isinstance(block_token, List):
+        list_items: list[ListItem] = (  # type: ignore
+            list(block_token.children) if block_token.children is not None else []
+        )
+        for index, list_item in enumerate(list_items):
+            list_item_start_line = get_line_number(list_item)
+            list_item_end_line = (
+                get_line_number(list_items[index + 1]) - 1
+                if index + 1 < len(list_items)
+                else end_line
+            )
+            list_item_shard, list_item_tags = parse_multiple_block_shards(
+                list_item.children,  # type: ignore
+                list_item_start_line,
+                list_item_end_line,
+            )
+            if list_item_shard is not None:
+                children.append(list_item_shard)
+            tags.extend(list_item_tags)
+
+    elif isinstance(block_token, (Paragraph, Heading)):
+        markers, tags = extract_markers_and_tags(block_token)
+
+    if len(markers) == 0 and len(children) == 0:
+        return None, tags
+
+    return build_shard(
+        start_line, end_line, markers=markers, tags=tags, children=children
+    ), []
+
+
+def parse_multiple_block_shards(
+    block_tokens: list[BlockToken],
+    start_line: int,
+    end_line: int,
+    enforce_shard: bool = False,
+) -> tuple[Shard | None, list[str]]:
+    is_first_block_heading = isinstance(block_tokens[0], Heading) and has_markers(
+        block_tokens[0]
+    )
+
+    paragraph_positions = find_paragraph_shard_positions(block_tokens)
+    children, tags = [], []
+
+    is_first_block_only_with_marker = False
+
+    for i, token in enumerate(block_tokens):
+        if i in paragraph_positions:
+            is_first_block_only_with_marker = i == 0
+
+        child_start_line = get_line_number(token)
+        child_end_line = (
+            get_line_number(block_tokens[i + 1]) - 1
+            if i + 1 < len(block_tokens)
+            else end_line
+        )
+
+        child_shard, child_tags = parse_single_block_shards(
+            token, child_start_line, child_end_line
+        )
+
+        if child_shard is not None:
+            children.append(child_shard)
+        if len(child_tags) > 0:
+            tags.extend(child_tags)
+
+    if len(children) == 0 and not enforce_shard:
+        return None, tags
+    if is_first_block_heading or is_first_block_only_with_marker:
+        return merge_into_first_shard(children, start_line, end_line, tags), []
+    else:
+        return build_shard(start_line, end_line, tags=tags, children=children), []
+
+
+def parse_header_shards(
+    block_tokens: list[BlockToken],
+    start_line: int,
+    end_line: int,
+    use_first_child_as_header: bool = False,
+) -> Shard | None:
+    if len(block_tokens) == 0:
+        return build_shard(start_line, end_line)
+
+    split_at_heading_level = calculate_heading_level_for_next_split(block_tokens)
+
+    if split_at_heading_level is None:
+        return parse_multiple_block_shards(
+            block_tokens, start_line, end_line, enforce_shard=True
+        )[0]
+
+    heading_positions = find_headings_by_level(block_tokens, split_at_heading_level)
+
+    block_tokens_split_by_heading = split_at(block_tokens, heading_positions)
+
+    children = []
+    for i, child_blocks in enumerate(block_tokens_split_by_heading):
+        child_start_line = get_line_number(child_blocks[0])
+        child_end_line = (
+            get_line_number(block_tokens_split_by_heading[i + 1][0]) - 1
+            if i + 1 < len(block_tokens_split_by_heading)
+            else end_line
+        )
+        if child_shard := parse_header_shards(
+            child_blocks,
+            child_start_line,
+            child_end_line,
+            use_first_child_as_header=i > 0 or 0 in heading_positions,
+        ):
+            children.append(child_shard)
+
+    if use_first_child_as_header and len(children) > 0:
+        return merge_into_first_shard(children, start_line, end_line)
+    else:
+        return build_shard(start_line, end_line, children=children)
+
+
+def parse_markdown_file(file_name: str, file_content: str) -> StreamFile:
+    shard = build_shard(1, max([len(file_content.splitlines()), 1]))
+
+    with TagMarkdownRenderer():
+        ast = Document(file_content)
+
+        block_tokens: list[BlockToken] = ast.children  # type: ignore
+        if len(block_tokens) > 0:
+            if parsed_shard := parse_header_shards(
+                block_tokens, shard.start_line, shard.end_line
+            ):
+                shard = parsed_shard
+
+    return StreamFile(shard=shard, file_name=file_name)
+
+
+__all__ = ["Shard", "StreamFile", "parse_markdown_file"]
diff --git a/src/streamer/parse/shard.py b/src/streamer/parse/shard.py
new file mode 100644
index 0000000..65432c3
--- /dev/null
+++ b/src/streamer/parse/shard.py
@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from pydantic import BaseModel
+
+
+class Shard(BaseModel):
+    markers: list[str] = []
+    tags: list[str] = []
+    start_line: int
+    end_line: int
+    children: list[Shard] = []
+
+
+class StreamFile(BaseModel):
+    file_name: str
+    shard: Shard | None = None
+
+
+__all__ = ["Shard", "StreamFile"]
diff --git a/src/streamer/query/__init__.py b/src/streamer/query/__init__.py
new file mode 100644
index 0000000..b0b08c3
--- /dev/null
+++ b/src/streamer/query/__init__.py
@@ -0,0 +1,3 @@
+from .find import find_shard, find_shard_by_position
+
+__all__ = ["find_shard_by_position", "find_shard"]
diff --git a/src/streamer/query/find.py b/src/streamer/query/find.py
new file mode 100644
index 0000000..49beeca
--- /dev/null
+++ b/src/streamer/query/find.py
@@ -0,0 +1,35 @@
+from typing import Callable
+
+from streamer.localize import LocalizedShard
+
+
+def find_shard(
+    shards: list[LocalizedShard], query_function: Callable[[LocalizedShard], bool]
+) -> list[LocalizedShard]:
+    found_shards = []
+
+    for shard in shards:
+        if query_function(shard):
+            found_shards.append(shard)
+        found_shards.extend(find_shard(shard.children, query_function))
+
+    return found_shards
+
+
+def find_shard_by_position(
+    shards: list[LocalizedShard], dimension: str, value: str
+) -> list[LocalizedShard]:
+    return find_shard(
+        shards,
+        lambda shard: dimension in shard.location
+        and shard.location[dimension] == value,
+    )
+
+
+def find_shard_by_set_dimension(
+    shards: list[LocalizedShard], dimension: str
+) -> list[LocalizedShard]:
+    return find_shard(shards, lambda shard: dimension in shard.location)
+
+
+__all__ = ["find_shard_by_position", "find_shard", "find_shard_by_set_dimension"]
diff --git a/src/streamer/settings/__init__.py b/src/streamer/settings/__init__.py
new file mode 100644
index 0000000..8099b01
--- /dev/null
+++ b/src/streamer/settings/__init__.py
@@ -0,0 +1,33 @@
+import os
+from pydantic_settings import (
+    BaseSettings,
+    PydanticBaseSettingsSource,
+    SettingsConfigDict,
+    YamlConfigSettingsSource,
+)
+from xdg_base_dirs import xdg_config_home
+
+SETTINGS_FILE = xdg_config_home() / "streamer" / "config.yaml"
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file_encoding="utf-8")
+
+    base_folder: str = os.getcwd()
+
+    @classmethod
+    def settings_customise_sources(
+        cls,
+        settings_cls: type[BaseSettings],
+        init_settings: PydanticBaseSettingsSource,
+        env_settings: PydanticBaseSettingsSource,
+        dotenv_settings: PydanticBaseSettingsSource,
+        file_secret_settings: PydanticBaseSettingsSource,
+    ) -> tuple[PydanticBaseSettingsSource, ...]:
+        return (
+            init_settings,
+            YamlConfigSettingsSource(settings_cls, yaml_file=SETTINGS_FILE),
+            dotenv_settings,
+            env_settings,
+            file_secret_settings,
+        )
diff --git a/src/streamer/timesheet/configuration.py b/src/streamer/timesheet/configuration.py
new file mode 100644
index 0000000..6b6c55d
--- /dev/null
+++ b/src/streamer/timesheet/configuration.py
@@ -0,0 +1,115 @@
+from enum import StrEnum
+
+from streamer.localize import RepositoryConfiguration
+from streamer.localize.repository_configuration import (
+    Dimension,
+    Marker,
+    MarkerPlacement,
+)
+
+TIMESHEET_TAG = "Timesheet"
+TIMESHEET_DIMENSION_NAME = "timesheet"
+
+
+class TimesheetPointType(StrEnum):
+    Card = "CARD"
+    SickLeave = "SICK_LEAVE"
+    Vacation = "VACATION"
+    Undertime = "UNDERTIME"
+    Holiday = "HOLIDAY"
+    Break = "BREAK"
+
+
+BasicTimesheetConfiguration = RepositoryConfiguration(
+    dimensions={
+        TIMESHEET_DIMENSION_NAME: Dimension(
+            display_name="Timesheet",
+            comment="Used by Timesheet-Subcommand to create Timecards",
+            propagate=False,
+        )
+    },
+    markers={
+        TIMESHEET_TAG: Marker(
+            display_name="A default time card",
+            placements=[
+                MarkerPlacement(
+                    dimension=TIMESHEET_DIMENSION_NAME,
+                    value=TimesheetPointType.Card.value,
+                    overwrites=False,
+                )
+            ],
+        ),
+        "VacationDay": Marker(
+            display_name="Vacation Day",
+            placements=[
+                MarkerPlacement(
+                    if_with={TIMESHEET_TAG},
+                    dimension=TIMESHEET_DIMENSION_NAME,
+                    value=TimesheetPointType.Vacation.value,
+                )
+            ],
+        ),
+        "Break": Marker(
+            display_name="Break",
+            placements=[
+                MarkerPlacement(
+                    if_with={TIMESHEET_TAG},
+                    dimension=TIMESHEET_DIMENSION_NAME,
+                    value=TimesheetPointType.Break.value,
+                )
+            ],
+        ),
+        "LunchBreak": Marker(
+            display_name="Break",
+            placements=[
+                MarkerPlacement(
+                    if_with={TIMESHEET_TAG},
+                    dimension=TIMESHEET_DIMENSION_NAME,
+                    value=TimesheetPointType.Break.value,
+                )
+            ],
+        ),
+        "Feierabend": Marker(
+            display_name="Break",
+            placements=[
+                MarkerPlacement(
+                    if_with={TIMESHEET_TAG},
+                    dimension=TIMESHEET_DIMENSION_NAME,
+                    value=TimesheetPointType.Break.value,
+                )
+            ],
+        ),
+        "Holiday": Marker(
+            display_name="Offical Holiday",
+            placements=[
+                MarkerPlacement(
+                    if_with={TIMESHEET_TAG},
+                    dimension=TIMESHEET_DIMENSION_NAME,
+                    value=TimesheetPointType.Holiday.value,
+                )
+            ],
+        ),
+        "SickLeave": Marker(
+            display_name="Sick Leave",
+            placements=[
+                MarkerPlacement(
+                    if_with={TIMESHEET_TAG},
+                    dimension=TIMESHEET_DIMENSION_NAME,
+                    value=TimesheetPointType.SickLeave.value,
+                )
+            ],
+        ),
+        "UndertimeDay": Marker(
+            display_name="Undertime Leave",
+            placements=[
+                MarkerPlacement(
+                    if_with={TIMESHEET_TAG},
+                    dimension=TIMESHEET_DIMENSION_NAME,
+                    value=TimesheetPointType.Undertime.value,
+                )
+            ],
+        ),
+    },
+)
+
+__all__ = ["BasicTimesheetConfiguration", "TIMESHEET_TAG", "TIMESHEET_DIMENSION_NAME"]
diff --git a/src/streamer/timesheet/extract.py b/src/streamer/timesheet/extract.py
new file mode 100644
index 0000000..85547cd
--- /dev/null
+++ b/src/streamer/timesheet/extract.py
@@ -0,0 +1,114 @@
+from datetime import datetime
+from itertools import groupby
+
+from pydantic import BaseModel
+
+from streamer.localize import LocalizedShard
+from streamer.query.find import find_shard_by_set_dimension
+
+from .configuration import TIMESHEET_DIMENSION_NAME, TimesheetPointType
+from .timecard import SpecialDayType, Timecard, Timesheet
+
+
+class TimesheetPoint(BaseModel):
+    moment: datetime
+    type: TimesheetPointType
+
+
+def shard_to_timesheet_point(shard: LocalizedShard) -> TimesheetPoint:
+    return TimesheetPoint(
+        moment=shard.moment,
+        type=TimesheetPointType(shard.location[TIMESHEET_DIMENSION_NAME]),
+    )
+
+
+def shards_to_timesheet_points(shards: list[LocalizedShard]) -> list[TimesheetPoint]:
+    return list(
+        map(
+            shard_to_timesheet_point,
+            find_shard_by_set_dimension(shards, TIMESHEET_DIMENSION_NAME),
+        )
+    )
+
+
+def aggregate_timecard_day(points: list[TimesheetPoint]) -> Timesheet | None:
+    sorted_points = sorted(points, key=lambda point: point.moment)
+
+    is_sick_leave = False
+    special_day_type = None
+
+    card_date = sorted_points[0].moment.date()
+
+    # We expect timesheet points to alternate between "Card" (start work) and
+    # "Break" (end work). Starting in "break" means we are not currently in a
+    # work block until we see the first Card.
+    last_is_break = True
+    last_time = sorted_points[0].moment.time()
+
+    timecards: list[Timecard] = []
+    for point in sorted_points:
+        if point.moment.date() != card_date:
+            raise ValueError("Dates of all given timesheet days should be consistent")
+
+        point_time = point.moment.time()
+
+        match point.type:
+            case TimesheetPointType.Holiday:
+                if special_day_type is not None:
+                    raise ValueError(
+                        f"{card_date} is both {point.type} and {special_day_type}"
+                    )
+                special_day_type = SpecialDayType.Holiday
+            case TimesheetPointType.Vacation:
+                if special_day_type is not None:
+                    raise ValueError(
+                        f"{card_date} is both {point.type} and {special_day_type}"
+                    )
+                special_day_type = SpecialDayType.Vacation
+            case TimesheetPointType.Undertime:
+                if special_day_type is not None:
+                    raise ValueError(
+                        f"{card_date} is both {point.type} and {special_day_type}"
+                    )
+                special_day_type = SpecialDayType.Undertime
+            case TimesheetPointType.SickLeave:
+                is_sick_leave = True
+            case TimesheetPointType.Break:
+                if not last_is_break:
+                    timecards.append(Timecard(from_time=last_time, to_time=point_time))
+                    last_is_break = True
+                    last_time = point_time
+            case TimesheetPointType.Card:
+                if last_is_break:
+                    last_is_break = False
+                    last_time = point_time
+
+    if not last_is_break:
+        raise ValueError(f"Last Timecard of {card_date} is not a break!")
+
+    if len(timecards) == 0 and not is_sick_leave and special_day_type is None:
+        return None
+
+    return Timesheet(
+        date=card_date,
+        is_sick_leave=is_sick_leave,
+        special_day_type=special_day_type,
+        timecards=timecards,
+    )
+
+
+def aggregate_timecards(points: list[TimesheetPoint]) -> list[Timesheet]:
+    day_timecards = [
+        aggregate_timecard_day(list(timecard))
+        for _date, timecard in groupby(points, key=lambda point: point.moment.date())
+    ]
+
+    return [timecard for timecard in day_timecards if timecard is not None]
+
+
+def extract_timesheets(shards: list[LocalizedShard]) -> list[Timesheet]:
+    points = shards_to_timesheet_points(shards)
+    return aggregate_timecards(points)
+
+
+__all__ = ["extract_timesheets"]
diff --git a/src/streamer/timesheet/timecard.py b/src/streamer/timesheet/timecard.py
new file mode 100644
index 0000000..f236d00
--- /dev/null
+++ b/src/streamer/timesheet/timecard.py
@@ -0,0 +1,23 @@
+from datetime import date, time
+from enum import StrEnum
+
+from pydantic import BaseModel
+
+
+class SpecialDayType(StrEnum):
+    Vacation = "VACATION"
+    Undertime = "UNDERTIME"
+    Holiday = "HOLIDAY"
+    Weekend = "WEEKEND"
+
+
+class Timecard(BaseModel):
+    from_time: time
+    to_time: time
+
+
+class Timesheet(BaseModel):
+    date: date
+    is_sick_leave: bool = False
+    special_day_type: SpecialDayType | None = None
+    timecards: list[Timecard]
diff --git a/src/timesheet/configuration.rs b/src/timesheet/configuration.rs
deleted file mode 100644
index 6e6a851..0000000
--- a/src/timesheet/configuration.rs
+++ /dev/null
@@ -1,84 +0,0 @@
-use once_cell::sync::Lazy;
-
-use crate::models::{Dimension, Marker, MarkerPlacement, RepositoryConfiguration};
-
-use super::TimesheetPointType;
-
-pub const TIMESHEET_TAG: &str = "Timesheet";
-pub const TIMESHEET_DIMENSION_NAME: &str = "timesheet";
-
-/// Pre-configured repository configuration for timesheet tracking.
-#[allow(non_upper_case_globals)]
-pub static BasicTimesheetConfiguration: Lazy<RepositoryConfiguration> = Lazy::new(|| {
-    RepositoryConfiguration::new()
-        .with_dimension(
-            TIMESHEET_DIMENSION_NAME,
-            Dimension::new("Timesheet")
-                .with_comment("Used by Timesheet-Subcommand to create Timecards")
-                .with_propagate(false),
-        )
-        .with_marker(
-            TIMESHEET_TAG,
-            Marker::new("A default time card").with_placements(vec![MarkerPlacement::new(
-                TIMESHEET_DIMENSION_NAME,
-            )
-            .with_value(TimesheetPointType::Card.as_str())
-            .with_overwrites(false)]),
-        )
-        .with_marker(
-            "VacationDay",
-            Marker::new("Vacation Day").with_placements(vec![MarkerPlacement::new(
-                TIMESHEET_DIMENSION_NAME,
-            )
-            .with_if_with(vec![TIMESHEET_TAG])
-            .with_value(TimesheetPointType::Vacation.as_str())]),
-        )
-        .with_marker(
-            "Break",
-            Marker::new("Break").with_placements(vec![MarkerPlacement::new(
-                TIMESHEET_DIMENSION_NAME,
-            )
-            .with_if_with(vec![TIMESHEET_TAG])
-            .with_value(TimesheetPointType::Break.as_str())]),
-        )
-        .with_marker(
-            "LunchBreak",
-            Marker::new("Break").with_placements(vec![MarkerPlacement::new(
-                TIMESHEET_DIMENSION_NAME,
-            )
-            .with_if_with(vec![TIMESHEET_TAG])
-            .with_value(TimesheetPointType::Break.as_str())]),
-        )
-        .with_marker(
-            "Feierabend",
-            Marker::new("Break").with_placements(vec![MarkerPlacement::new(
-                TIMESHEET_DIMENSION_NAME,
-            )
-            .with_if_with(vec![TIMESHEET_TAG])
-            .with_value(TimesheetPointType::Break.as_str())]),
-        )
-        .with_marker(
-            "Holiday",
-            Marker::new("Official Holiday").with_placements(vec![MarkerPlacement::new(
-                TIMESHEET_DIMENSION_NAME,
-            )
-            .with_if_with(vec![TIMESHEET_TAG])
-            .with_value(TimesheetPointType::Holiday.as_str())]),
-        )
-        .with_marker(
-            "SickLeave",
-            Marker::new("Sick Leave").with_placements(vec![MarkerPlacement::new(
-                TIMESHEET_DIMENSION_NAME,
-            )
-            .with_if_with(vec![TIMESHEET_TAG])
-            .with_value(TimesheetPointType::SickLeave.as_str())]),
-        )
-        .with_marker(
-            "UndertimeDay",
-            Marker::new("Undertime Leave").with_placements(vec![MarkerPlacement::new(
-                TIMESHEET_DIMENSION_NAME,
-            )
-            .with_if_with(vec![TIMESHEET_TAG])
-            .with_value(TimesheetPointType::Undertime.as_str())]),
-        )
-});
diff --git a/src/timesheet/extract.rs b/src/timesheet/extract.rs
deleted file mode 100644
index e11131e..0000000
--- a/src/timesheet/extract.rs
+++ /dev/null
@@ -1,537 +0,0 @@
-use chrono::{DateTime, Utc};
-use itertools::Itertools;
-
-use crate::error::StreamdError;
-use crate::models::{LocalizedShard, SpecialDayType, Timecard, Timesheet};
-use crate::query::find_shard_by_set_dimension;
-
-use super::configuration::TIMESHEET_DIMENSION_NAME;
-use super::TimesheetPointType;
-
-/// A point in time with an associated timesheet type.
-#[derive(Debug, Clone)]
-struct TimesheetPoint {
-    moment: DateTime<Utc>,
-    point_type: TimesheetPointType,
-}
-
-/// Convert a localized shard to a timesheet point.
-fn shard_to_timesheet_point(shard: &LocalizedShard) -> Option<TimesheetPoint> {
-    let type_str = shard.location.get(TIMESHEET_DIMENSION_NAME)?;
-    let point_type = type_str.parse::<TimesheetPointType>().ok()?;
-
-    Some(TimesheetPoint {
-        moment: shard.moment,
-        point_type,
-    })
-}
-
-/// Convert localized shards to timesheet points.
-fn shards_to_timesheet_points(shards: &[LocalizedShard]) -> Vec<TimesheetPoint> {
-    find_shard_by_set_dimension(shards, TIMESHEET_DIMENSION_NAME)
-        .iter()
-        .filter_map(shard_to_timesheet_point)
-        .collect()
-}
-
-/// Aggregate timesheet points for a single day into a Timesheet.
-fn aggregate_timecard_day(points: &[TimesheetPoint]) -> Result<Option<Timesheet>, StreamdError> {
-    if points.is_empty() {
-        return Ok(None);
-    }
-
-    let sorted_points: Vec<_> = {
-        let mut pts = points.to_vec();
-        pts.sort_by_key(|p| p.moment);
-        pts
-    };
-
-    let card_date = sorted_points[0].moment.date_naive();
-    let mut is_sick_leave = false;
-    let mut special_day_type: Option<SpecialDayType> = None;
-
-    // State machine: starting in "break" mode (not working)
-    let mut last_is_break = true;
-    let mut last_time = sorted_points[0].moment.time();
-    let mut timecards: Vec<Timecard> = Vec::new();
-
-    for point in &sorted_points {
-        if point.moment.date_naive() != card_date {
-            return Err(StreamdError::TimesheetError(
-                "Dates of all given timesheet days should be consistent".to_string(),
-            ));
-        }
-
-        let point_time = point.moment.time();
-
-        match point.point_type {
-            TimesheetPointType::Holiday => {
-                if special_day_type.is_some() {
-                    return Err(StreamdError::TimesheetError(format!(
-                        "{} is both {:?} and {:?}",
-                        card_date, point.point_type, special_day_type
-                    )));
-                }
-                special_day_type = Some(SpecialDayType::Holiday);
-            }
-            TimesheetPointType::Vacation => {
-                if special_day_type.is_some() {
-                    return Err(StreamdError::TimesheetError(format!(
-                        "{} is both {:?} and {:?}",
-                        card_date, point.point_type, special_day_type
-                    )));
-                }
-                special_day_type = Some(SpecialDayType::Vacation);
-            }
-            TimesheetPointType::Undertime => {
-                if special_day_type.is_some() {
-                    return Err(StreamdError::TimesheetError(format!(
-                        "{} is both {:?} and {:?}",
-                        card_date, point.point_type, special_day_type
-                    )));
-                }
-                special_day_type = Some(SpecialDayType::Undertime);
-            }
-            TimesheetPointType::SickLeave => {
-                is_sick_leave = true;
-            }
-            TimesheetPointType::Break => {
-                if !last_is_break {
-                    timecards.push(Timecard::new(last_time, point_time));
-                    last_is_break = true;
-                    last_time = point_time;
-                }
-            }
-            TimesheetPointType::Card => {
-                if last_is_break {
-                    last_is_break = false;
-                    last_time = point_time;
-                }
-            }
-        }
-    }
-
-    // Check that we ended in break mode
-    if !last_is_break {
-        return Err(StreamdError::TimesheetError(format!(
-            "Last Timecard of {} is not a break!",
-            card_date
-        )));
-    }
-
-    // Only return a timesheet if there's meaningful data
-    if timecards.is_empty() && !is_sick_leave && special_day_type.is_none() {
-        return Ok(None);
-    }
-
-    Ok(Some(Timesheet {
-        date: card_date,
-        is_sick_leave,
-        special_day_type,
-        timecards,
-    }))
-}
-
-/// Aggregate timesheet points into timesheets, grouped by day.
-fn aggregate_timecards(points: &[TimesheetPoint]) -> Result<Vec<Timesheet>, StreamdError> {
-    let mut timesheets = Vec::new();
-
-    // Group by date
-    for (_date, group) in &points.iter().chunk_by(|p| p.moment.date_naive()) {
-        let day_points: Vec<_> = group.cloned().collect();
-        if let Some(timesheet) = aggregate_timecard_day(&day_points)? {
-            timesheets.push(timesheet);
-        }
-    }
-
-    Ok(timesheets)
-}
-
-/// Extract timesheets from localized shards.
-pub fn extract_timesheets(shards: &[LocalizedShard]) -> Result<Vec<Timesheet>, StreamdError> {
-    let points = shards_to_timesheet_points(shards);
-    aggregate_timecards(&points)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use chrono::{NaiveTime, TimeZone};
-    use indexmap::IndexMap;
-
-    fn point(at: DateTime<Utc>, point_type: TimesheetPointType) -> LocalizedShard {
-        let mut location = IndexMap::new();
-        location.insert(
-            TIMESHEET_DIMENSION_NAME.to_string(),
-            point_type.as_str().to_string(),
-        );
-        location.insert("file".to_string(), "dummy.md".to_string());
-
-        LocalizedShard {
-            moment: at,
-            markers: vec!["Timesheet".to_string()],
-            tags: vec![],
-            start_line: 1,
-            end_line: 1,
-            children: vec![],
-            location,
-        }
-    }
-
-    #[test]
-    fn test_single_work_block() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(17, 30, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 1);
-        assert_eq!(result[0].date, day.date_naive());
-        assert!(!result[0].is_sick_leave);
-        assert!(result[0].special_day_type.is_none());
-        assert_eq!(result[0].timecards.len(), 1);
-        assert_eq!(
-            result[0].timecards[0].from_time,
-            NaiveTime::from_hms_opt(9, 0, 0).unwrap()
-        );
-        assert_eq!(
-            result[0].timecards[0].to_time,
-            NaiveTime::from_hms_opt(17, 30, 0).unwrap()
-        );
-    }
-
-    #[test]
-    fn test_three_work_blocks_separated_by_breaks() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(7, 15, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(12, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(12, 45, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(15, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(16, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(17, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 1);
-        assert_eq!(result[0].timecards.len(), 3);
-        assert_eq!(
-            result[0].timecards[0].from_time,
-            NaiveTime::from_hms_opt(7, 15, 0).unwrap()
-        );
-        assert_eq!(
-            result[0].timecards[0].to_time,
-            NaiveTime::from_hms_opt(12, 0, 0).unwrap()
-        );
-    }
-
-    #[test]
-    fn test_input_order_is_not_required_within_a_day() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(15, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(7, 15, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(12, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(12, 45, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(17, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(16, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 1);
-        assert_eq!(result[0].timecards.len(), 3);
-    }
-
-    #[test]
-    fn test_groups_by_day() {
-        let day1 = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let day2 = Utc.with_ymd_and_hms(2026, 2, 2, 0, 0, 0).unwrap();
-
-        let shards = vec![
-            point(
-                day1.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day1.with_time(NaiveTime::from_hms_opt(17, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-            point(
-                day2.with_time(NaiveTime::from_hms_opt(10, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day2.with_time(NaiveTime::from_hms_opt(18, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 2);
-        assert_eq!(result[0].date, day1.date_naive());
-        assert_eq!(result[1].date, day2.date_naive());
-    }
-
-    #[test]
-    fn test_day_with_only_special_day_type_vacation() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(8, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Vacation,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 1);
-        assert_eq!(result[0].special_day_type, Some(SpecialDayType::Vacation));
-        assert!(result[0].timecards.is_empty());
-    }
-
-    #[test]
-    fn test_day_with_only_special_day_type_holiday() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(8, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Holiday,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 1);
-        assert_eq!(result[0].special_day_type, Some(SpecialDayType::Holiday));
-    }
-
-    #[test]
-    fn test_day_with_only_special_day_type_undertime() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(8, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Undertime,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 1);
-        assert_eq!(result[0].special_day_type, Some(SpecialDayType::Undertime));
-    }
-
-    #[test]
-    fn test_day_with_sick_leave_and_timecards() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(7, 30, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::SickLeave,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(12, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 1);
-        assert!(result[0].is_sick_leave);
-        assert_eq!(result[0].timecards.len(), 1);
-    }
-
-    #[test]
-    fn test_day_with_sick_leave_only() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(8, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::SickLeave,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert_eq!(result.len(), 1);
-        assert!(result[0].is_sick_leave);
-        assert!(result[0].timecards.is_empty());
-    }
-
-    #[test]
-    fn test_empty_input() {
-        let result = extract_timesheets(&[]).unwrap();
-        assert!(result.is_empty());
-    }
-
-    #[test]
-    fn test_day_with_only_cards_and_no_break_is_invalid() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(12, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Card,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards);
-
-        assert!(result.is_err());
-        let err = result.unwrap_err();
-        assert!(err.to_string().contains("not a break"));
-    }
-
-    #[test]
-    fn test_two_special_day_types_same_day_is_invalid() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(8, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Vacation,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(8, 5, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Holiday,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(9, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards);
-
-        assert!(result.is_err());
-        let err = result.unwrap_err();
-        assert!(err.to_string().contains("is both"));
-    }
-
-    #[test]
-    fn test_day_with_only_breaks_is_ignored() {
-        let day = Utc.with_ymd_and_hms(2026, 2, 1, 0, 0, 0).unwrap();
-        let shards = vec![
-            point(
-                day.with_time(NaiveTime::from_hms_opt(12, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-            point(
-                day.with_time(NaiveTime::from_hms_opt(13, 0, 0).unwrap())
-                    .unwrap(),
-                TimesheetPointType::Break,
-            ),
-        ];
-
-        let result = extract_timesheets(&shards).unwrap();
-
-        assert!(result.is_empty());
-    }
-}
diff --git a/src/timesheet/mod.rs b/src/timesheet/mod.rs
deleted file mode 100644
index 85bbab2..0000000
--- a/src/timesheet/mod.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-mod configuration;
-mod extract;
-mod point_types;
-
-pub use configuration::{BasicTimesheetConfiguration, TIMESHEET_DIMENSION_NAME, TIMESHEET_TAG};
-pub use extract::extract_timesheets;
-pub use point_types::TimesheetPointType;
diff --git a/src/timesheet/point_types.rs b/src/timesheet/point_types.rs
deleted file mode 100644
index 29d3ece..0000000
--- a/src/timesheet/point_types.rs
+++ /dev/null
@@ -1,54 +0,0 @@
-use serde::{Deserialize, Serialize};
-use std::str::FromStr;
-
-/// Type of timesheet point for time tracking.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
-pub enum TimesheetPointType {
-    #[serde(rename = "CARD")]
-    Card,
-    #[serde(rename = "SICK_LEAVE")]
-    SickLeave,
-    #[serde(rename = "VACATION")]
-    Vacation,
-    #[serde(rename = "UNDERTIME")]
-    Undertime,
-    #[serde(rename = "HOLIDAY")]
-    Holiday,
-    #[serde(rename = "BREAK")]
-    Break,
-}
-
-impl TimesheetPointType {
-    pub fn as_str(&self) -> &'static str {
-        match self {
-            TimesheetPointType::Card => "CARD",
-            TimesheetPointType::SickLeave => "SICK_LEAVE",
-            TimesheetPointType::Vacation => "VACATION",
-            TimesheetPointType::Undertime => "UNDERTIME",
-            TimesheetPointType::Holiday => "HOLIDAY",
-            TimesheetPointType::Break => "BREAK",
-        }
-    }
-}
-
-impl std::fmt::Display for TimesheetPointType {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.as_str())
-    }
-}
-
-impl FromStr for TimesheetPointType {
-    type Err = String;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "CARD" => Ok(TimesheetPointType::Card),
-            "SICK_LEAVE" => Ok(TimesheetPointType::SickLeave),
-            "VACATION" => Ok(TimesheetPointType::Vacation),
-            "UNDERTIME" => Ok(TimesheetPointType::Undertime),
-            "HOLIDAY" => Ok(TimesheetPointType::Holiday),
-            "BREAK" => Ok(TimesheetPointType::Break),
-            _ => Err(format!("Unknown timesheet point type: {}", s)),
-        }
-    }
-}
diff --git a/streamd.svg b/streamd.svg
deleted file mode 100644
index 11973db..0000000
--- a/streamd.svg
+++ /dev/null
@@ -1,283 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-
-<svg
-   width="192"
-   height="192"
-   viewBox="0 0 192 192"
-   version="1.1"
-   id="svg5"
-   inkscape:version="1.4.2 (ebf0e940d0, 2025-05-08)"
-   sodipodi:docname="streamd.svg"
-   inkscape:export-xdpi="96"
-   inkscape:export-ydpi="96"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
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-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:dc="http://purl.org/dc/elements/1.1/">
-  <title
-     id="title1">Streamd</title>
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-     id="namedview7"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
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-     inkscape:snap-bbox-edge-midpoints="true"
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-     inkscape:object-paths="true"
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diff --git a/test/localize/test_extract_datetime.py b/test/localize/test_extract_datetime.py
new file mode 100644
index 0000000..279f194
--- /dev/null
+++ b/test/localize/test_extract_datetime.py
@@ -0,0 +1,157 @@
+from datetime import date, datetime, time
+
+from streamer.localize.extract_datetime import (
+    extract_date_from_marker,
+    extract_datetime_from_file_name,
+    extract_datetime_from_marker,
+    extract_datetime_from_marker_list,
+    extract_time_from_marker,
+)
+
+
+class TestExtractDateTime:
+    def test_extract_date_from_file_name_valid(self):
+        file_name = "20230101-123456 Some Text.md"
+        assert datetime(2023, 1, 1, 12, 34, 56) == extract_datetime_from_file_name(
+            file_name
+        )
+
+    def test_extract_date_from_file_name_invalid(self):
+        file_name = "invalid-file-name.md"
+        assert extract_datetime_from_file_name(file_name) is None
+
+    def test_extract_date_from_file_name_without_time(self):
+        file_name = "20230101 Some Text.md"
+        assert datetime(2023, 1, 1, 0, 0, 0) == extract_datetime_from_file_name(
+            file_name
+        )
+
+    def test_extract_date_from_file_name_short_time(self):
+        file_name = "20230101-1234 Some Text.md"
+        assert datetime(2023, 1, 1, 12, 34, 0) == extract_datetime_from_file_name(
+            file_name
+        )
+
+    def test_extract_date_from_file_name_empty_string(self):
+        file_name = ""
+        assert extract_datetime_from_file_name(file_name) is None
+
+    def test_extract_date_from_file_name_with_full_path(self):
+        file_name = "/path/to/20230101-123456 Some Text.md"
+        assert datetime(2023, 1, 1, 12, 34, 56) == extract_datetime_from_file_name(
+            file_name
+        )
+
+
+class TestExtractMarkerDateTime:
+    def test_extract_datetime_from_marker_valid(self):
+        marker = "20250101150000"
+        assert datetime(2025, 1, 1, 15, 0, 0) == extract_datetime_from_marker(marker)
+
+    def test_extract_datetime_from_marker_invalid_format(self):
+        assert extract_datetime_from_marker("2025010115000") is None  # too short
+        assert extract_datetime_from_marker("202501011500000") is None  # too long
+        assert extract_datetime_from_marker("2025-01-01T150000") is None  # separators
+        assert extract_datetime_from_marker("2025010115000a") is None  # non-digit
+        assert extract_datetime_from_marker("") is None
+
+    def test_extract_datetime_from_marker_invalid_values(self):
+        assert extract_datetime_from_marker("20250230120000") is None  # Feb 30
+        assert extract_datetime_from_marker("20250101126000") is None  # minute 60
+        assert extract_datetime_from_marker("20250101240000") is None  # hour 24
+
+
+class TestExtractMarkerDate:
+    def test_extract_date_from_marker_valid(self):
+        marker = "20250101"
+        assert date(2025, 1, 1) == extract_date_from_marker(marker)
+
+    def test_extract_date_from_marker_invalid_format(self):
+        assert extract_date_from_marker("2025010") is None  # too short
+        assert extract_date_from_marker("202501011") is None  # too long
+        assert extract_date_from_marker("2025-01-01") is None  # separators
+        assert extract_date_from_marker("2025010a") is None  # non-digit
+        assert extract_date_from_marker("") is None
+
+    def test_extract_date_from_marker_invalid_values(self):
+        assert extract_date_from_marker("20250230") is None  # Feb 30
+        assert extract_date_from_marker("20251301") is None  # month 13
+        assert extract_date_from_marker("20250132") is None  # day 32
+
+
+class TestExtractMarkerTime:
+    def test_extract_time_from_marker_valid(self):
+        marker = "150000"
+        assert time(15, 0, 0) == extract_time_from_marker(marker)
+
+    def test_extract_time_from_marker_invalid_format(self):
+        assert extract_time_from_marker("15000") is None  # too short
+        assert extract_time_from_marker("1500000") is None  # too long
+        assert extract_time_from_marker("15:00:00") is None  # separators
+        assert extract_time_from_marker("15000a") is None  # non-digit
+        assert extract_time_from_marker("") is None
+
+    def test_extract_time_from_marker_invalid_values(self):
+        assert extract_time_from_marker("240000") is None  # hour 24
+        assert extract_time_from_marker("156000") is None  # minute 60
+        assert extract_time_from_marker("150060") is None  # second 60
+
+
+class TestExtractDateTimeFromMarkerList:
+    def test_no_markers_inherits_datetime(self):
+        inherited = datetime(2025, 1, 2, 3, 4, 5)
+        assert inherited == extract_datetime_from_marker_list([], inherited)
+
+    def test_unrelated_markers_inherits_datetime(self):
+        inherited = datetime(2025, 1, 2, 3, 4, 5)
+        markers = ["not-a-marker", "2025-01-01", "1500", "1234567"]
+        assert inherited == extract_datetime_from_marker_list(markers, inherited)
+
+    def test_date_only_marker_sets_midnight(self):
+        inherited = datetime(2025, 6, 7, 8, 9, 10)
+        markers = ["20250101"]
+        assert datetime(2025, 1, 1, 0, 0, 0) == extract_datetime_from_marker_list(
+            markers, inherited
+        )
+
+    def test_time_only_marker_inherits_date(self):
+        inherited = datetime(2025, 6, 7, 8, 9, 10)
+        markers = ["150000"]
+        assert datetime(2025, 6, 7, 15, 0, 0) == extract_datetime_from_marker_list(
+            markers, inherited
+        )
+
+    def test_datetime_marker_overrides_both_date_and_time(self):
+        inherited = datetime(2025, 6, 7, 8, 9, 10)
+        markers = ["20250101150000"]
+        assert datetime(2025, 1, 1, 15, 0, 0) == extract_datetime_from_marker_list(
+            markers, inherited
+        )
+
+    def test_combined_date_and_time_markers(self):
+        inherited = datetime(2025, 6, 7, 8, 9, 10)
+        markers = ["20250101", "150000"]
+        assert datetime(2025, 1, 1, 15, 0, 0) == extract_datetime_from_marker_list(
+            markers, inherited
+        )
+
+    def test_first_marker_wins_when_multiple_dates_or_times(self):
+        inherited = datetime(2025, 6, 7, 8, 9, 10)
+        markers = ["20250101", "150000", "20250102", "160000"]
+        assert datetime(2025, 1, 1, 15, 0, 0) == extract_datetime_from_marker_list(
+            markers, inherited
+        )
+
+    def test_last_separated_date_and_time_win(self):
+        inherited = datetime(2025, 6, 7, 8, 9, 10)
+        markers = ["20250101", "150000", "20250102160000"]
+        assert datetime(2025, 1, 1, 15, 0, 0) == extract_datetime_from_marker_list(
+            markers, inherited
+        )
+
+    def test_invalid_date_or_time_markers_are_ignored(self):
+        inherited = datetime(2025, 6, 7, 8, 9, 10)
+        markers = ["20251301", "240000", "20250101", "150000"]
+        assert datetime(2025, 1, 1, 15, 0, 0) == extract_datetime_from_marker_list(
+            markers, inherited
+        )
diff --git a/test/localize/test_repository_configuration_merge.py b/test/localize/test_repository_configuration_merge.py
new file mode 100644
index 0000000..f5d345d
--- /dev/null
+++ b/test/localize/test_repository_configuration_merge.py
@@ -0,0 +1,365 @@
+import pytest
+
+from streamer.localize.repository_configuration import (
+    Dimension,
+    Marker,
+    MarkerPlacement,
+    RepositoryConfiguration,
+    merge_dimensions,
+    merge_markers,
+    merge_repository_configuration,
+    merge_single_dimension,
+    merge_single_marker,
+)
+
+
+class TestMergeSingleDimension:
+    def test_second_overrides_display_name_when_non_empty(self):
+        base = Dimension(display_name="Base", comment="c1", propagate=True)
+        second = Dimension(display_name="Second", comment="c2", propagate=False)
+
+        merged = merge_single_dimension(base, second)
+
+        assert merged.display_name == "Second"
+        assert merged.comment == "c2"
+        assert merged.propagate is False
+
+    def test_second_empty_display_name_falls_back_to_base(self):
+        base = Dimension(display_name="Base", comment="c1", propagate=True)
+        second = Dimension(display_name="", comment="c2", propagate=False)
+
+        merged = merge_single_dimension(base, second)
+
+        assert merged.display_name == "Base"
+        assert merged.comment == "c2"
+        assert merged.propagate is False
+
+    def test_second_comment_none_does_not_erase_base_comment(self):
+        base = Dimension(display_name="Base", comment="keep", propagate=True)
+        second = Dimension(display_name="Second", comment=None, propagate=False)
+
+        merged = merge_single_dimension(base, second)
+
+        assert merged.display_name == "Second"
+        assert merged.comment == "keep"
+
+    def test_second_comment_non_none_overrides_base_comment(self):
+        base = Dimension(display_name="Base", comment="c1", propagate=True)
+        second = Dimension(display_name="Second", comment="c2", propagate=True)
+
+        merged = merge_single_dimension(base, second)
+
+        assert merged.comment == "c2"
+
+    def test_second_propagate_overrides_base_when_provided(self):
+        base = Dimension(display_name="Base", comment="c1", propagate=True)
+        second = Dimension(display_name="Second", comment="c2", propagate=False)
+
+        merged = merge_single_dimension(base, second)
+
+        assert merged.propagate is False
+
+    def test_propagate_merging_retains_base_when_second_not_provided(self):
+        base = Dimension(display_name="Base", comment="c1", propagate=True)
+        second = Dimension(display_name="Second", comment="c2")
+
+        merged = merge_single_dimension(base, second)
+
+        assert merged.propagate is True
+
+
+class TestMergeDimensions:
+    def test_adds_new_keys_from_second(self):
+        base = {"a": Dimension(display_name="A", propagate=True)}
+        second = {"b": Dimension(display_name="B", propagate=False)}
+
+        merged = merge_dimensions(base, second)
+
+        assert set(merged.keys()) == {"a", "b"}
+        assert merged["a"].display_name == "A"
+        assert merged["b"].display_name == "B"
+
+    def test_merges_existing_keys(self):
+        base = {"a": Dimension(display_name="A", comment="c1", propagate=True)}
+        second = {"a": Dimension(display_name="A2", comment=None, propagate=False)}
+
+        merged = merge_dimensions(base, second)
+
+        assert merged["a"].display_name == "A2"
+        assert merged["a"].comment == "c1"
+        assert merged["a"].propagate is False
+
+    def test_does_not_mutate_inputs(self):
+        base = {"a": Dimension(display_name="A", comment="c1", propagate=True)}
+        second = {"b": Dimension(display_name="B", comment="c2", propagate=False)}
+
+        merged = merge_dimensions(base, second)
+
+        assert "b" not in base
+        assert "a" not in second
+        assert set(merged.keys()) == {"a", "b"}
+
+
+class TestMergeSingleMarker:
+    def test_second_overrides_display_name_when_non_empty(self):
+        base = Marker(
+            display_name="Base",
+            placements=[MarkerPlacement(dimension="project", value=None)],
+        )
+        second = Marker(
+            display_name="Second",
+            placements=[MarkerPlacement(dimension="timesheet", value="coding")],
+        )
+
+        merged = merge_single_marker(base, second)
+
+        assert merged.display_name == "Second"
+        assert merged.placements == [
+            MarkerPlacement(dimension="project", value=None, if_with=set()),
+            MarkerPlacement(dimension="timesheet", value="coding", if_with=set()),
+        ]
+
+    def test_second_empty_display_name_falls_back_to_base(self):
+        base = Marker(display_name="Base", placements=[])
+        second = Marker(display_name="", placements=[])
+
+        merged = merge_single_marker(base, second)
+
+        assert merged.display_name == "Base"
+
+    def test_appends_new_placements(self):
+        base = Marker(
+            display_name="Base",
+            placements=[
+                MarkerPlacement(dimension="project"),
+            ],
+        )
+        second = Marker(
+            display_name="Second",
+            placements=[
+                MarkerPlacement(
+                    if_with={"Timesheet"}, dimension="timesheet", value="x"
+                ),
+            ],
+        )
+
+        merged = merge_single_marker(base, second)
+
+        assert merged.placements == [
+            MarkerPlacement(dimension="project"),
+            MarkerPlacement(if_with={"Timesheet"}, dimension="timesheet", value="x"),
+        ]
+
+    def test_deduplicates_by_identity_and_second_overrides_base(self):
+        base = Marker(
+            display_name="Base",
+            placements=[
+                MarkerPlacement(if_with={"A"}, dimension="d", value="v"),
+                MarkerPlacement(if_with={"B"}, dimension="d", value="v2"),
+            ],
+        )
+        second = Marker(
+            display_name="Second",
+            placements=[
+                MarkerPlacement(if_with={"A"}, dimension="d", value="v"),
+                MarkerPlacement(if_with={"C"}, dimension="d", value="v3"),
+            ],
+        )
+
+        merged = merge_single_marker(base, second)
+
+        assert merged.placements == [
+            MarkerPlacement(if_with={"A"}, dimension="d", value="v"),
+            MarkerPlacement(if_with={"B"}, dimension="d", value="v2"),
+            MarkerPlacement(if_with={"C"}, dimension="d", value="v3"),
+        ]
+
+    def test_identity_is_order_insensitive_for_if_with(self):
+        base = Marker(
+            display_name="Base",
+            placements=[MarkerPlacement(if_with={"A", "B"}, dimension="d", value="v")],
+        )
+        second = Marker(
+            display_name="Second",
+            placements=[MarkerPlacement(if_with={"B", "A"}, dimension="d", value="v2")],
+        )
+
+        merged = merge_single_marker(base, second)
+
+        # With `if_with` as a set, identity is order-insensitive; second overrides base.
+        assert merged.placements == [
+            MarkerPlacement(if_with={"A", "B"}, dimension="d", value="v2"),
+        ]
+
+
+class TestMergeMarkers:
+    def test_adds_new_marker_keys_from_second(self):
+        base = {"M1": Marker(display_name="M1", placements=[])}
+        second = {"M2": Marker(display_name="M2", placements=[])}
+
+        merged = merge_markers(base, second)
+
+        assert set(merged.keys()) == {"M1", "M2"}
+
+    def test_merges_existing_marker_keys(self):
+        base = {
+            "M": Marker(
+                display_name="Base",
+                placements=[MarkerPlacement(dimension="project")],
+            )
+        }
+        second = {
+            "M": Marker(
+                display_name="Second",
+                placements=[
+                    MarkerPlacement(
+                        if_with={"Timesheet"}, dimension="timesheet", value="coding"
+                    )
+                ],
+            )
+        }
+
+        merged = merge_markers(base, second)
+
+        assert merged["M"].display_name == "Second"
+        assert merged["M"].placements == [
+            MarkerPlacement(dimension="project", value=None, if_with=set()),
+            MarkerPlacement(
+                if_with={"Timesheet"}, dimension="timesheet", value="coding"
+            ),
+        ]
+
+    def test_does_not_mutate_inputs(self):
+        base = {"M1": Marker(display_name="M1", placements=[])}
+        second = {"M2": Marker(display_name="M2", placements=[])}
+
+        merged = merge_markers(base, second)
+
+        assert "M2" not in base
+        assert "M1" not in second
+        assert set(merged.keys()) == {"M1", "M2"}
+
+
+class TestMergeRepositoryConfiguration:
+    def test_merges_dimensions_and_markers(self):
+        base = RepositoryConfiguration(
+            dimensions={
+                "project": Dimension(
+                    display_name="Project", comment="c1", propagate=True
+                ),
+                "moment": Dimension(
+                    display_name="Moment", comment="c2", propagate=True
+                ),
+            },
+            markers={
+                "Streamer": Marker(
+                    display_name="Streamer",
+                    placements=[MarkerPlacement(dimension="project")],
+                )
+            },
+        )
+
+        second = RepositoryConfiguration(
+            dimensions={
+                "project": Dimension(display_name="Project2", propagate=False),
+                "timesheet": Dimension(
+                    display_name="Timesheet", comment="c3", propagate=False
+                ),
+            },
+            markers={
+                "Streamer": Marker(
+                    display_name="Streamer2",
+                    placements=[
+                        MarkerPlacement(
+                            if_with={"Timesheet"}, dimension="timesheet", value="coding"
+                        )
+                    ],
+                ),
+                "JobHunting": Marker(
+                    display_name="JobHunting",
+                    placements=[MarkerPlacement(dimension="project")],
+                ),
+            },
+        )
+
+        merged = merge_repository_configuration(base, second)
+
+        assert set(merged.dimensions.keys()) == {"project", "moment", "timesheet"}
+        assert merged.dimensions["project"].display_name == "Project2"
+        assert merged.dimensions["project"].comment == "c1"
+        assert merged.dimensions["project"].propagate is False
+        assert merged.dimensions["moment"].display_name == "Moment"
+        assert merged.dimensions["timesheet"].display_name == "Timesheet"
+
+        assert set(merged.markers.keys()) == {"Streamer", "JobHunting"}
+        assert merged.markers["Streamer"].display_name == "Streamer2"
+        assert merged.markers["Streamer"].placements == [
+            MarkerPlacement(dimension="project", value=None, if_with=set()),
+            MarkerPlacement(
+                if_with={"Timesheet"}, dimension="timesheet", value="coding"
+            ),
+        ]
+        assert merged.markers["JobHunting"].placements == [
+            MarkerPlacement(dimension="project", value=None, if_with=set())
+        ]
+
+    def test_does_not_mutate_base_or_second(self):
+        base = RepositoryConfiguration(
+            dimensions={"a": Dimension(display_name="A", propagate=True)},
+            markers={"M": Marker(display_name="M", placements=[])},
+        )
+        second = RepositoryConfiguration(
+            dimensions={"b": Dimension(display_name="B", propagate=False)},
+            markers={"N": Marker(display_name="N", placements=[])},
+        )
+
+        _ = merge_repository_configuration(base, second)
+
+        assert set(base.dimensions.keys()) == {"a"}
+        assert set(second.dimensions.keys()) == {"b"}
+        assert set(base.markers.keys()) == {"M"}
+        assert set(second.markers.keys()) == {"N"}
+
+    def test_merge_is_associative_for_non_conflicting_inputs(self):
+        a = RepositoryConfiguration(
+            dimensions={"d1": Dimension(display_name="D1", propagate=True)},
+            markers={"m1": Marker(display_name="M1", placements=[])},
+        )
+        b = RepositoryConfiguration(
+            dimensions={"d2": Dimension(display_name="D2", propagate=False)},
+            markers={"m2": Marker(display_name="M2", placements=[])},
+        )
+        c = RepositoryConfiguration(
+            dimensions={"d3": Dimension(display_name="D3", propagate=False)},
+            markers={"m3": Marker(display_name="M3", placements=[])},
+        )
+
+        left = merge_repository_configuration(merge_repository_configuration(a, b), c)
+        right = merge_repository_configuration(a, merge_repository_configuration(b, c))
+
+        assert left == right
+        assert set(left.dimensions.keys()) == {"d1", "d2", "d3"}
+        assert set(left.markers.keys()) == {"m1", "m2", "m3"}
+
+
+@pytest.mark.parametrize(
+    ("base", "second", "expected_propagate"),
+    [
+        (
+            RepositoryConfiguration(
+                dimensions={"d": Dimension(display_name="D", propagate=True)},
+                markers={},
+            ),
+            RepositoryConfiguration(
+                dimensions={"d": Dimension(display_name="D2")},
+                markers={},
+            ),
+            True,
+        )
+    ],
+)
+def test_merge_repository_configuration_propagate_preserves_base_when_omitted(
+    base, second, expected_propagate
+):
+    merged = merge_repository_configuration(base, second)
+    assert merged.dimensions["d"].propagate is expected_propagate
diff --git a/test/parse/test_parse.py b/test/parse/test_parse.py
new file mode 100644
index 0000000..b692120
--- /dev/null
+++ b/test/parse/test_parse.py
@@ -0,0 +1,344 @@
+from faker import Faker
+
+from streamer.parse import Shard, StreamFile, parse_markdown_file
+
+fake = Faker()
+
+
+class TestParseProcess:
+    file_name: str = fake.file_name(extension="md")
+
+    def test_parse_empty_file(self):
+        assert parse_markdown_file(self.file_name, "") == StreamFile(
+            file_name=self.file_name, shard=Shard(start_line=1, end_line=1)
+        )
+
+    def test_parse_basic_one_line_file(self):
+        test_file = "Hello World"
+        assert parse_markdown_file(self.file_name, test_file) == StreamFile(
+            file_name=self.file_name,
+            shard=Shard(
+                start_line=1,
+                end_line=1,
+            ),
+        )
+
+    def test_parse_basic_multi_line_file(self):
+        test_file = "Hello World\n\nHello again!"
+        assert parse_markdown_file(self.file_name, test_file) == StreamFile(
+            file_name=self.file_name,
+            shard=Shard(
+                start_line=1,
+                end_line=3,
+            ),
+        )
+
+    def test_parse_single_line_with_tag(self):
+        test_file = "@Tag Hello World"
+        assert parse_markdown_file(self.file_name, test_file) == StreamFile(
+            file_name=self.file_name,
+            shard=Shard(
+                markers=["Tag"],
+                start_line=1,
+                end_line=1,
+            ),
+        )
+
+    def test_parse_single_line_with_two_tags(self):
+        test_file = "@Marker1 @Marker2 Hello World"
+        assert parse_markdown_file(self.file_name, test_file) == StreamFile(
+            file_name=self.file_name,
+            shard=Shard(
+                markers=["Marker1", "Marker2"],
+                start_line=1,
+                end_line=1,
+            ),
+        )
+
+    def test_parse_single_line_with_two_tags_and_misplaced_tag(self):
+        test_file = "@Tag1 @Tag2 Hello World @Tag3"
+        assert parse_markdown_file(self.file_name, test_file) == StreamFile(
+            file_name=self.file_name,
+            shard=Shard(
+                markers=["Tag1", "Tag2"],
+                tags=["Tag3"],
+                start_line=1,
+                end_line=1,
+            ),
+        )
+
+    def test_parse_split_paragraphs_into_shards(self):
+        file_text = "Hello World!\n\n@Tag1 Block 1\n\n@Tag2 Block 2"
+
+        assert parse_markdown_file(self.file_name, file_text) == StreamFile(
+            file_name=self.file_name,
+            shard=Shard(
+                start_line=1,
+                end_line=5,
+                children=[
+                    Shard(
+                        markers=["Tag1"],
+                        start_line=3,
+                        end_line=3,
+                    ),
+                    Shard(
+                        markers=["Tag2"],
+                        start_line=5,
+                        end_line=5,
+                    ),
+                ],
+            ),
+        )
+
+    def test_parse_split_paragraph_with_inner_tags_at_more_positions(self):
+        file_text = "Hello @Tag1 World!\n\n@Marker Block 1\n\nBlock 2 @Tag2"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            tags=["Tag1", "Tag2"],
+            start_line=1,
+            end_line=5,
+            children=[
+                Shard(markers=["Marker"], start_line=3, end_line=3, children=[]),
+            ],
+        )
+
+    def test_parse_header_without_markers(self):
+        file_text = "# Heading\n\n## Subheading"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            start_line=1,
+            end_line=3,
+        )
+
+    def test_parse_split_at_heading_if_marker_on_subheading(self):
+        file_text = "# Heading @Tag1\n\n## @Marker1 Subheading @Tag2\n\n# Heading @Tag3"
+
+        assert parse_markdown_file(self.file_name, file_text) == StreamFile(
+            file_name=self.file_name,
+            shard=Shard(
+                start_line=1,
+                end_line=5,
+                children=[
+                    Shard(
+                        tags=["Tag1"],
+                        start_line=1,
+                        end_line=4,
+                        children=[
+                            Shard(
+                                markers=["Marker1"],
+                                tags=["Tag2"],
+                                start_line=3,
+                                end_line=4,
+                            ),
+                        ],
+                    ),
+                    Shard(tags=["Tag3"], start_line=5, end_line=5, children=[]),
+                ],
+            ),
+        )
+
+    def test_parse_only_parse_releveant_levels(self):
+        file_text = "# @Marker1 Heading @Tag1\n\n## Subheading @Tag2"
+
+        assert parse_markdown_file(self.file_name, file_text) == StreamFile(
+            file_name=self.file_name,
+            shard=Shard(
+                markers=["Marker1"],
+                tags=["Tag1", "Tag2"],
+                start_line=1,
+                end_line=3,
+            ),
+        )
+
+    def test_parse_fullly_before_headings_start(self):
+        file_text = "Hello\n\n@Marker1 World!\n\n# @Marker2 I'm a heading!"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            start_line=1,
+            end_line=5,
+            children=[
+                Shard(
+                    start_line=1,
+                    end_line=4,
+                    children=[
+                        Shard(
+                            markers=["Marker1"],
+                            start_line=3,
+                            end_line=3,
+                        )
+                    ],
+                ),
+                Shard(markers=["Marker2"], start_line=5, end_line=5, children=[]),
+            ],
+        )
+
+    def test_parse_complex_heading_structure(self):
+        file_text = "Preamble @Preamble\n## @Intro\n# @Title\n## @Chapter1\n## @Chapter2\n### Section 1\n### Section 2"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            start_line=1,
+            end_line=7,
+            children=[
+                Shard(
+                    start_line=1,
+                    end_line=2,
+                    children=[
+                        Shard(
+                            tags=["Preamble"],
+                            start_line=1,
+                            end_line=1,
+                        ),
+                        Shard(
+                            markers=["Intro"],
+                            start_line=2,
+                            end_line=2,
+                        ),
+                    ],
+                ),
+                Shard(
+                    markers=["Title"],
+                    start_line=3,
+                    end_line=7,
+                    children=[
+                        Shard(
+                            markers=["Chapter1"],
+                            start_line=4,
+                            end_line=4,
+                        ),
+                        Shard(
+                            markers=["Chapter2"],
+                            start_line=5,
+                            end_line=7,
+                        ),
+                    ],
+                ),
+            ],
+        )
+
+    def test_simple_list(self):
+        file_text = "* hello world\n  * @Marker i've got a marker"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            markers=[],
+            tags=[],
+            start_line=1,
+            end_line=2,
+            children=[
+                Shard(
+                    markers=["Marker"], tags=[], start_line=2, end_line=2, children=[]
+                )
+            ],
+        )
+
+    def test_parse_complex_list(self):
+        file_text = """* I'm the parent!
+    * @Marker1 I've got a marker\n
+    * I've got no marker!
+    * I've got a child with a marker!
+        * @Marker2 I'm the child with the marker
+"""
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            markers=[],
+            tags=[],
+            start_line=1,
+            end_line=6,
+            children=[
+                Shard(
+                    markers=[],
+                    tags=[],
+                    start_line=2,
+                    end_line=6,
+                    children=[
+                        Shard(
+                            markers=["Marker1"],
+                            tags=[],
+                            start_line=2,
+                            end_line=3,
+                            children=[],
+                        ),
+                        Shard(
+                            markers=[],
+                            tags=[],
+                            start_line=5,
+                            end_line=6,
+                            children=[
+                                Shard(
+                                    markers=["Marker2"],
+                                    tags=[],
+                                    start_line=6,
+                                    end_line=6,
+                                    children=[],
+                                )
+                            ],
+                        ),
+                    ],
+                )
+            ],
+        )
+
+    def test_parse_ignores_tags_in_code(self):
+        file_text = "```\n@Marker\n```"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            markers=[],
+            tags=[],
+            start_line=1,
+            end_line=3,
+            children=[],
+        )
+
+    def test_parse_finds_tags_in_italic_text(self):
+        file_text = "*@ItalicMarker*"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            markers=["ItalicMarker"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+        )
+
+    def test_parse_finds_tags_in_bold_text(self):
+        file_text = "**@BoldMarker**"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            markers=["BoldMarker"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+        )
+
+    def test_parse_finds_tags_in_strikethrough_text(self):
+        file_text = "~~@StrikeMarker~~"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            markers=["StrikeMarker"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+        )
+
+    def test_parse_finds_tags_in_link(self):
+        file_text = "[@LinkMarker](https://konstantinfickel.de)"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            markers=["LinkMarker"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+        )
+
+    def test_parse_continues_looking_for_markers_after_first_link_marker(self):
+        file_text = "[@LinkMarker1](https://konstantinfickel.de1) [@LinkMarker2](https://konstantinfickel.de)"
+
+        assert parse_markdown_file(self.file_name, file_text).shard == Shard(
+            markers=["LinkMarker1", "LinkMarker2"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+        )
diff --git a/test/query/test_find.py b/test/query/test_find.py
new file mode 100644
index 0000000..725d3b2
--- /dev/null
+++ b/test/query/test_find.py
@@ -0,0 +1,104 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from streamer.localize import LocalizedShard
+from streamer.query.find import find_shard, find_shard_by_position
+
+
+def generate_localized_shard(
+    *,
+    location: dict[str, str] | None = None,
+    children: list[LocalizedShard] | None = None,
+) -> LocalizedShard:
+    return LocalizedShard(
+        start_line=1,
+        end_line=1,
+        moment=datetime(2020, 1, 1),
+        location=location or {},
+        children=children or [],
+        markers=[],
+        tags=[],
+    )
+
+
+class TestFindShard:
+    def test_returns_empty_when_no_match(self) -> None:
+        root = generate_localized_shard(location={"file": "a.md"})
+        shards = [root]
+
+        result = find_shard(shards, lambda s: "missing" in s.location)
+
+        assert result == []
+
+    def test_finds_matches_depth_first_and_preserves_order(self) -> None:
+        grandchild = generate_localized_shard(location={"k": "match"})
+        child1 = generate_localized_shard(
+            location={"k": "match"}, children=[grandchild]
+        )
+        child2 = generate_localized_shard(location={"k": "nope"})
+        root = generate_localized_shard(
+            location={"k": "nope"}, children=[child1, child2]
+        )
+
+        result = find_shard([root], lambda s: s.location.get("k") == "match")
+
+        assert result == [child1, grandchild]
+
+    def test_includes_root_if_it_matches(self) -> None:
+        root = generate_localized_shard(
+            location={"k": "match"},
+            children=[generate_localized_shard(location={"k": "match"})],
+        )
+
+        result = find_shard([root], lambda s: s.location.get("k") == "match")
+
+        assert result[0] is root
+        assert len(result) == 2
+
+    def test_multiple_roots_keeps_left_to_right_order(self) -> None:
+        a = generate_localized_shard(location={"k": "match"})
+        b = generate_localized_shard(location={"k": "match"})
+        c = generate_localized_shard(location={"k": "nope"})
+
+        result = find_shard([a, b, c], lambda s: s.location.get("k") == "match")
+
+        assert result == [a, b]
+
+    def test_query_function_can_use_arbitrary_logic(self) -> None:
+        # Ensures typing/behavior supports any callable that returns bool.
+        a = generate_localized_shard(location={"x": "1"})
+        b = generate_localized_shard(location={"x": "2"})
+        c = generate_localized_shard(location={"x": "3"})
+        root = generate_localized_shard(location={}, children=[a, b, c])
+
+        def is_even_x(shard: LocalizedShard) -> bool:
+            x = shard.location.get("x")
+            return x is not None and int(x) % 2 == 0
+
+        result = find_shard([root], is_even_x)
+
+        assert result == [b]
+
+
+class TestFindShardByPosition:
+    def test_matches_only_when_dimension_present_and_equal(self) -> None:
+        match = generate_localized_shard(location={"file": "a.md", "line": "10"})
+        wrong_value = generate_localized_shard(location={"file": "a.md", "line": "11"})
+        missing_dim = generate_localized_shard(location={"file": "a.md"})
+        root = generate_localized_shard(
+            location={"root": "x"}, children=[match, wrong_value, missing_dim]
+        )
+
+        result = find_shard_by_position([root], "line", "10")
+
+        assert result == [match]
+
+    def test_recurses_through_children(self) -> None:
+        deep = generate_localized_shard(location={"section": "s1"})
+        mid = generate_localized_shard(location={"section": "s0"}, children=[deep])
+        root = generate_localized_shard(location={}, children=[mid])
+
+        result = find_shard_by_position([root], "section", "s1")
+
+        assert result == [deep]
diff --git a/test/test_localize.py b/test/test_localize.py
new file mode 100644
index 0000000..678604b
--- /dev/null
+++ b/test/test_localize.py
@@ -0,0 +1,231 @@
+from datetime import datetime
+
+from streamer.localize.localize import localize_stream_file
+from streamer.localize.localized_shard import LocalizedShard
+from streamer.localize.repository_configuration import (
+    Dimension,
+    Marker,
+    MarkerPlacement,
+    RepositoryConfiguration,
+)
+from streamer.parse.shard import Shard, StreamFile
+
+repository_configuration = RepositoryConfiguration(
+    dimensions={
+        "project": Dimension(
+            display_name="Project",
+            comment="GTD Project that is being worked on",
+            propagate=True,
+        ),
+        "moment": Dimension(
+            display_name="Moment",
+            comment="Timestamp this entry was created at",
+            propagate=True,
+        ),
+        "timesheet": Dimension(
+            display_name="Timesheet",
+            comment="Time Cards for Time Tracking",
+            propagate=True,
+        ),
+    },
+    markers={
+        "Streamer": Marker(
+            display_name="Streamer",
+            placements=[
+                MarkerPlacement(dimension="project"),
+                MarkerPlacement(
+                    if_with={"Timesheet"}, dimension="timesheet", value="coding"
+                ),
+            ],
+        ),
+        "JobHunting": Marker(
+            display_name="JobHunting", placements=[MarkerPlacement(dimension="project")]
+        ),
+    },
+)
+
+
+class TestLocalize:
+    def test_project_simple_stream_file(self):
+        stream_file = StreamFile(
+            file_name="20250622-121000 Test File.md",
+            shard=Shard(start_line=1, end_line=1, markers=["Streamer"]),
+        )
+
+        assert localize_stream_file(
+            stream_file, repository_configuration
+        ) == LocalizedShard(
+            moment=datetime(2025, 6, 22, 12, 10, 0, 0),
+            markers=["Streamer"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+            location={"project": "Streamer", "file": stream_file.file_name},
+        )
+
+    def test_timesheet_use_case(self):
+        stream_file = StreamFile(
+            file_name="20260131-210000 Test File.md",
+            shard=Shard(start_line=1, end_line=1, markers=["Timesheet", "Streamer"]),
+        )
+
+        assert localize_stream_file(
+            stream_file, repository_configuration
+        ) == LocalizedShard(
+            moment=datetime(2026, 1, 31, 21, 0, 0, 0),
+            markers=["Timesheet", "Streamer"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+            location={
+                "file": stream_file.file_name,
+                "project": "Streamer",
+                "timesheet": "coding",
+            },
+        )
+
+    def test_overwrites_true_propagated_dimension_overwrites_existing_value(self):
+        config = RepositoryConfiguration(
+            dimensions={
+                "project": Dimension(display_name="Project", propagate=True),
+            },
+            markers={
+                "A": Marker(
+                    display_name="A",
+                    placements=[MarkerPlacement(dimension="project", value="a")],
+                ),
+                "B": Marker(
+                    display_name="B",
+                    placements=[
+                        MarkerPlacement(dimension="project", value="b", overwrites=True)
+                    ],
+                ),
+            },
+        )
+
+        stream_file = StreamFile(
+            file_name="20260131-210000 Test File.md",
+            shard=Shard(start_line=1, end_line=1, markers=["A", "B"]),
+        )
+
+        assert localize_stream_file(stream_file, config) == LocalizedShard(
+            moment=datetime(2026, 1, 31, 21, 0, 0, 0),
+            markers=["A", "B"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+            location={"file": stream_file.file_name, "project": "b"},
+        )
+
+    def test_overwrites_false_propagated_dimension_does_not_overwrite_existing_value(
+        self,
+    ):
+        config = RepositoryConfiguration(
+            dimensions={
+                "project": Dimension(display_name="Project", propagate=True),
+            },
+            markers={
+                "A": Marker(
+                    display_name="A",
+                    placements=[MarkerPlacement(dimension="project", value="a")],
+                ),
+                "B": Marker(
+                    display_name="B",
+                    placements=[
+                        MarkerPlacement(
+                            dimension="project", value="b", overwrites=False
+                        )
+                    ],
+                ),
+            },
+        )
+
+        stream_file = StreamFile(
+            file_name="20260131-210000 Test File.md",
+            shard=Shard(start_line=1, end_line=1, markers=["A", "B"]),
+        )
+
+        assert localize_stream_file(stream_file, config) == LocalizedShard(
+            moment=datetime(2026, 1, 31, 21, 0, 0, 0),
+            markers=["A", "B"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+            location={"file": stream_file.file_name, "project": "a"},
+        )
+
+    def test_overwrites_true_non_propagated_dimension_overwrites_private_value(self):
+        config = RepositoryConfiguration(
+            dimensions={
+                "label": Dimension(display_name="Label", propagate=False),
+            },
+            markers={
+                "A": Marker(
+                    display_name="A",
+                    placements=[MarkerPlacement(dimension="label", value="a")],
+                ),
+                "B": Marker(
+                    display_name="B",
+                    placements=[
+                        MarkerPlacement(dimension="label", value="b", overwrites=True)
+                    ],
+                ),
+            },
+        )
+
+        stream_file = StreamFile(
+            file_name="20260131-210000 Test File.md",
+            shard=Shard(start_line=1, end_line=1, markers=["A", "B"]),
+        )
+
+        assert localize_stream_file(stream_file, config) == LocalizedShard(
+            moment=datetime(2026, 1, 31, 21, 0, 0, 0),
+            markers=["A", "B"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+            location={"file": stream_file.file_name, "label": "b"},
+        )
+
+    def test_overwrites_false_non_propagated_dimension_does_not_overwrite_private_value(
+        self,
+    ):
+        config = RepositoryConfiguration(
+            dimensions={
+                "label": Dimension(display_name="Label", propagate=False),
+            },
+            markers={
+                "A": Marker(
+                    display_name="A",
+                    placements=[
+                        MarkerPlacement(dimension="label", value="a", overwrites=True)
+                    ],
+                ),
+                "B": Marker(
+                    display_name="B",
+                    placements=[
+                        MarkerPlacement(dimension="label", value="b", overwrites=False)
+                    ],
+                ),
+            },
+        )
+
+        stream_file = StreamFile(
+            file_name="20260131-210000 Test File.md",
+            shard=Shard(start_line=1, end_line=1, markers=["A", "B"]),
+        )
+
+        assert localize_stream_file(stream_file, config) == LocalizedShard(
+            moment=datetime(2026, 1, 31, 21, 0, 0, 0),
+            markers=["A", "B"],
+            tags=[],
+            start_line=1,
+            end_line=1,
+            children=[],
+            location={"file": stream_file.file_name, "label": "a"},
+        )
diff --git a/test/timesheet/test_extract_timesheets.py b/test/timesheet/test_extract_timesheets.py
new file mode 100644
index 0000000..c5a0bbe
--- /dev/null
+++ b/test/timesheet/test_extract_timesheets.py
@@ -0,0 +1,288 @@
+from __future__ import annotations
+
+from datetime import datetime, time
+
+import pytest
+
+from streamer.localize.localized_shard import LocalizedShard
+from streamer.timesheet.configuration import (
+    TIMESHEET_DIMENSION_NAME,
+    TimesheetPointType,
+)
+from streamer.timesheet.extract import extract_timesheets
+from streamer.timesheet.timecard import SpecialDayType, Timecard, Timesheet
+
+
+def point(at: datetime, type: TimesheetPointType) -> LocalizedShard:
+    """
+    Create a minimal LocalizedShard that will be interpreted as a timesheet point.
+
+    Note: The extract pipeline uses set-dimension filtering; we therefore ensure the
+    timesheet dimension is set in `location`.
+    """
+    return LocalizedShard(
+        moment=at,
+        markers=["Timesheet"],
+        tags=[],
+        start_line=1,
+        end_line=1,
+        children=[],
+        location={TIMESHEET_DIMENSION_NAME: type.value, "file": "dummy.md"},
+    )
+
+
+class TestExtractTimesheets:
+    def test_single_work_block(self):
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=9, minute=0), TimesheetPointType.Card),
+            point(day.replace(hour=17, minute=30), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day.date(),
+                is_sick_leave=False,
+                special_day_type=None,
+                timecards=[Timecard(from_time=time(9, 0), to_time=time(17, 30))],
+            )
+        ]
+
+    def test_three_work_blocks_separated_by_breaks(self):
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=7, minute=15), TimesheetPointType.Card),
+            point(day.replace(hour=12, minute=0), TimesheetPointType.Break),
+            point(day.replace(hour=12, minute=45), TimesheetPointType.Card),
+            point(day.replace(hour=15, minute=0), TimesheetPointType.Break),
+            point(day.replace(hour=16, minute=0), TimesheetPointType.Card),
+            point(day.replace(hour=17, minute=0), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day.date(),
+                is_sick_leave=False,
+                special_day_type=None,
+                timecards=[
+                    Timecard(from_time=time(7, 15), to_time=time(12, 0)),
+                    Timecard(from_time=time(12, 45), to_time=time(15, 0)),
+                    Timecard(from_time=time(16, 0), to_time=time(17, 0)),
+                ],
+            )
+        ]
+
+    def test_input_order_is_not_required_within_a_day(self):
+        """
+        Points may come unsorted; extraction should sort by timestamp within a day.
+        """
+        day = datetime(2026, 2, 1, 0, 0, 0)
+
+        shards = [
+            point(day.replace(hour=15, minute=0), TimesheetPointType.Break),
+            point(day.replace(hour=7, minute=15), TimesheetPointType.Card),
+            point(day.replace(hour=12, minute=0), TimesheetPointType.Break),
+            point(day.replace(hour=12, minute=45), TimesheetPointType.Card),
+            point(day.replace(hour=17, minute=0), TimesheetPointType.Break),
+            point(day.replace(hour=16, minute=0), TimesheetPointType.Card),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day.date(),
+                is_sick_leave=False,
+                special_day_type=None,
+                timecards=[
+                    Timecard(from_time=time(7, 15), to_time=time(12, 0)),
+                    Timecard(from_time=time(12, 45), to_time=time(15, 0)),
+                    Timecard(from_time=time(16, 0), to_time=time(17, 0)),
+                ],
+            )
+        ]
+
+    def test_groups_by_day(self):
+        """
+        If points span multiple days, we should get one Timesheet per day.
+        """
+        day1 = datetime(2026, 2, 1, 0, 0, 0)
+        day2 = datetime(2026, 2, 2, 0, 0, 0)
+
+        shards = [
+            point(day2.replace(hour=10, minute=0), TimesheetPointType.Card),
+            point(day2.replace(hour=18, minute=0), TimesheetPointType.Break),
+            point(day1.replace(hour=9, minute=0), TimesheetPointType.Card),
+            point(day1.replace(hour=17, minute=0), TimesheetPointType.Break),
+        ]
+
+        # Note: current implementation groups by date using `itertools.groupby` on the
+        # incoming order; to be robust, we pass day1 points first, then day2 points.
+        # This asserts the intended behavior.
+        shards = [
+            point(day1.replace(hour=9, minute=0), TimesheetPointType.Card),
+            point(day1.replace(hour=17, minute=0), TimesheetPointType.Break),
+            point(day2.replace(hour=10, minute=0), TimesheetPointType.Card),
+            point(day2.replace(hour=18, minute=0), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day1.date(),
+                is_sick_leave=False,
+                special_day_type=None,
+                timecards=[Timecard(from_time=time(9, 0), to_time=time(17, 0))],
+            ),
+            Timesheet(
+                date=day2.date(),
+                is_sick_leave=False,
+                special_day_type=None,
+                timecards=[Timecard(from_time=time(10, 0), to_time=time(18, 0))],
+            ),
+        ]
+
+    def test_day_with_only_special_day_type_vacation(self):
+        """
+        A day can be marked as Vacation without timecards; it should still produce a Timesheet.
+        """
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=8, minute=0), TimesheetPointType.Vacation),
+            point(day.replace(hour=9, minute=0), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day.date(),
+                is_sick_leave=False,
+                special_day_type=SpecialDayType.Vacation,
+                timecards=[],
+            )
+        ]
+
+    def test_day_with_only_special_day_type_holiday(self):
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=8, minute=0), TimesheetPointType.Holiday),
+            point(day.replace(hour=9, minute=0), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day.date(),
+                is_sick_leave=False,
+                special_day_type=SpecialDayType.Holiday,
+                timecards=[],
+            )
+        ]
+
+    def test_day_with_only_special_day_type_undertime(self):
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=8, minute=0), TimesheetPointType.Undertime),
+            point(day.replace(hour=9, minute=0), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day.date(),
+                is_sick_leave=False,
+                special_day_type=SpecialDayType.Undertime,
+                timecards=[],
+            )
+        ]
+
+    def test_day_with_sick_leave_and_timecards(self):
+        """
+        SickLeave should set the flag but not prevent timecard aggregation.
+        """
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=7, minute=30), TimesheetPointType.SickLeave),
+            point(day.replace(hour=9, minute=0), TimesheetPointType.Card),
+            point(day.replace(hour=12, minute=0), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day.date(),
+                is_sick_leave=True,
+                special_day_type=None,
+                timecards=[Timecard(from_time=time(9, 0), to_time=time(12, 0))],
+            )
+        ]
+
+    def test_day_with_sick_leave_only(self):
+        """
+        A day with only SickLeave should still produce a Timesheet (no timecards).
+        """
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=8, minute=0), TimesheetPointType.SickLeave),
+            point(day.replace(hour=9, minute=0), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == [
+            Timesheet(
+                date=day.date(),
+                is_sick_leave=True,
+                special_day_type=None,
+                timecards=[],
+            )
+        ]
+
+    def test_empty_input(self):
+        assert extract_timesheets([]) == []
+
+    def test_day_with_only_cards_and_no_break_is_invalid(self):
+        """
+        A day ending 'in work' (last point not a Break) should raise.
+        """
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=9, minute=0), TimesheetPointType.Card),
+            point(day.replace(hour=12, minute=0), TimesheetPointType.Card),
+        ]
+
+        with pytest.raises(ValueError, match=r"Last Timecard of .* is not a break"):
+            extract_timesheets(shards)
+
+    def test_two_special_day_types_same_day_is_invalid(self):
+        """
+        A day cannot be both Vacation and Holiday (or any two distinct special types).
+        """
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=8, minute=0), TimesheetPointType.Vacation),
+            point(day.replace(hour=8, minute=5), TimesheetPointType.Holiday),
+            point(day.replace(hour=9, minute=0), TimesheetPointType.Break),
+        ]
+
+        with pytest.raises(ValueError, match=r"is both .* and .*"):
+            extract_timesheets(shards)
+
+    def test_points_with_mixed_dates_inside_one_group_raises(self):
+        """
+        Defensive: if aggregation receives points spanning multiple dates for a single day,
+        it should raise. (This can occur if higher-level grouping is incorrect.)
+        """
+        day1 = datetime(2026, 2, 1, 0, 0, 0)
+        day2 = datetime(2026, 2, 2, 0, 0, 0)
+
+        shards = [
+            point(day1.replace(hour=9, minute=0), TimesheetPointType.Card),
+            point(day2.replace(hour=9, minute=30), TimesheetPointType.Break),
+        ]
+
+        with pytest.raises(ValueError, match=r"Last Timecard of .* is not a break"):
+            extract_timesheets(shards)
+
+    def test_day_with_only_breaks_is_ignored(self):
+        """
+        A day with no timecards and no sick/special markers should not emit a Timesheet.
+        """
+        day = datetime(2026, 2, 1, 0, 0, 0)
+        shards = [
+            point(day.replace(hour=12, minute=0), TimesheetPointType.Break),
+            point(day.replace(hour=13, minute=0), TimesheetPointType.Break),
+        ]
+
+        assert extract_timesheets(shards) == []
diff --git a/uv.lock b/uv.lock
new file mode 100644
index 0000000..4be435e
--- /dev/null
+++ b/uv.lock
@@ -0,0 +1,460 @@
+version = 1
+revision = 3
+requires-python = ">=3.12"
+
+[[package]]
+name = "annotated-doc"
+version = "0.0.4"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/57/ba/046ceea27344560984e26a590f90bc7f4a75b06701f653222458922b558c/annotated_doc-0.0.4.tar.gz", hash = "sha256:fbcda96e87e9c92ad167c2e53839e57503ecfda18804ea28102353485033faa4", size = 7288, upload-time = "2025-11-10T22:07:42.062Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/1e/d3/26bf1008eb3d2daa8ef4cacc7f3bfdc11818d111f7e2d0201bc6e3b49d45/annotated_doc-0.0.4-py3-none-any.whl", hash = "sha256:571ac1dc6991c450b25a9c2d84a3705e2ae7a53467b5d111c24fa8baabbed320", size = 5303, upload-time = "2025-11-10T22:07:40.673Z" },
+]
+
+[[package]]
+name = "annotated-types"
+version = "0.7.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/ee/67/531ea369ba64dcff5ec9c3402f9f51bf748cec26dde048a2f973a4eea7f5/annotated_types-0.7.0.tar.gz", hash = "sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89", size = 16081, upload-time = "2024-05-20T21:33:25.928Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/78/b6/6307fbef88d9b5ee7421e68d78a9f162e0da4900bc5f5793f6d3d0e34fb8/annotated_types-0.7.0-py3-none-any.whl", hash = "sha256:1f02e8b43a8fbbc3f3e0d4f0f4bfc8131bcb4eebe8849b8e5c773f3a1c582a53", size = 13643, upload-time = "2024-05-20T21:33:24.1Z" },
+]
+
+[[package]]
+name = "click"
+version = "8.3.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "colorama", marker = "sys_platform == 'win32'" },
+]
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