feat: add Zed extension release artifact with WSL2 support

The Zed extension now detects Windows via current_platform() and
automatically uses `wsl streamd lsp` instead of `streamd lsp`,
enabling seamless LSP support when Zed runs on Windows with streamd
installed in WSL2.

A pre-built zip (extension.toml + extension.wasm) is now built as
`zed-extension-zip` and published to every release. The README gains
a step-by-step WSL2 installation guide.

.forgejo/workflows/release.yml

@@ -53,6 +53,10 @@ jobs:
         if: steps.version.outputs.SKIP != 'true'
         run: nix build .#streamd-windows -o result-windows
 
+      - name: Build Zed extension
+        if: steps.version.outputs.SKIP != 'true'
+        run: nix build .#zed-extension-zip -o result-zed-extension-zip
+
       - name: Prepare release artifacts
         if: steps.version.outputs.SKIP != 'true'
         run: |
@@ -60,6 +64,7 @@ jobs:
           cp result-deb release/streamd_${{ steps.version.outputs.VERSION }}_amd64.deb
           cp result-musl/bin/streamd release/streamd-${{ steps.version.outputs.VERSION }}-linux-x86_64
           cp result-windows/bin/streamd.exe release/streamd-${{ steps.version.outputs.VERSION }}-windows-x86_64.exe
+          cp result-zed-extension-zip release/streamd-zed-extension-${{ steps.version.outputs.VERSION }}.zip
 
       - name: Create release
         if: steps.version.outputs.SKIP != 'true'

README.md

@@ -153,6 +153,41 @@ Add to `~/.config/zed/settings.json`:
 
 The `"..."` keeps Zed's default Markdown servers (e.g. `marksman`) active alongside streamd.
 
+#### Zed Extension (WSL2)
+
+If you run Zed on Windows with streamd installed inside WSL2, use the pre-built Zed extension instead of the manual config above. The extension auto-detects Windows and routes LSP communication through WSL2.
+
+**1. Install streamd in WSL2** (e.g. via the `.deb` package):
+
+```bash
+wget https://git.konstantinfickel.de/kfickel/streamd/releases/download/vX.Y.Z/streamd_X.Y.Z_amd64.deb
+sudo dpkg -i streamd_X.Y.Z_amd64.deb
+```
+
+**2. Download the extension** from the same release page:
+
+```
+streamd-zed-extension-X.Y.Z.zip
+```
+
+**3. Extract the zip** to a permanent folder on your Windows machine, e.g.:
+
+```
+C:\Users\<you>\zed-extensions\streamd-zed-extension\
+```
+
+The folder must contain `extension.toml` and `extension.wasm`.
+
+**4. Install the extension in Zed** via the command palette (`Ctrl+Shift+P`):
+
+```
+zed: install dev extension
+```
+
+Point Zed to the extracted folder.
+
+**5. Verify** by opening a Markdown file inside a directory that contains `.streamd.toml` — `@` completions and diagnostics should become active.
+
 ### Neovim (nvim-lspconfig)
 
 **1. Register the server** — add to your Neovim config (e.g. `~/.config/nvim/init.lua` or a plugin file):

zed-extension/src/lib.rs

@@ -1,4 +1,4 @@
-use zed_extension_api::{self as zed, Command, LanguageServerId, Result, Worktree};
+use zed_extension_api::{self as zed, Command, LanguageServerId, Os, Result, Worktree, current_platform};
 
 struct StreamdExtension;
 
@@ -12,6 +12,14 @@ impl zed::Extension for StreamdExtension {
         _language_server_id: &LanguageServerId,
         _worktree: &Worktree,
     ) -> Result<Command> {
+        let (os, _) = current_platform();
+        if os == Os::Windows {
+            Ok(Command {
+                command: "wsl".into(),
+                args: vec!["streamd".into(), "lsp".into()],
+                env: vec![],
+            })
+        } else {
             Ok(Command {
                 command: "streamd".into(),
                 args: vec!["lsp".into()],
@@ -19,5 +27,6 @@ impl zed::Extension for StreamdExtension {
             })
         }
     }
+}
 
 zed::register_extension!(StreamdExtension);