- build_graph() creates a DAG from project config with validation
- get_build_order() wraps topological_generations() for parallel batches
- get_subgraph_for_target() extracts transitive deps for single-target builds
- Validates missing dependencies and cycle detection
- TargetType enum with IMAGE/TEXT variants
- Defaults, TargetConfig, ProjectConfig pydantic models
- infer_target_type() for extension-based type dispatch
- resolve_model() for default/override model resolution
- load_config() using yaml.safe_load + model_validate
- Create bulkgen/ package with __init__.py
- Create bulkgen/providers/ subpackage with __init__.py
- Add mistralai>=1.0.0 to dependencies
- Add [project.scripts] entry point and [build-system] with hatchling
- Add .bulkgen.state.yaml to .gitignore