Add Git workflow and update docs

README.md

@@ -72,6 +72,14 @@ rp --version
 uv sync
 ```
 
+### Testing
+
+```bash
+uv run pytest           # Run all tests
+uv run pytest -v        # Verbose output
+uv run pytest tests/test_detect.py  # Single file
+```
+
 ### Linting & Type Checking
 
 ```bash
@@ -86,6 +94,13 @@ uv run mypy src/
 uv build
 ```
 
+## Workflow
+
+- `main` — stable release branch
+- `dev` — integration branch for day-to-day work
+- Short-lived branches: `feature/<topic>`, `fix/<topic>`, `docs/<topic>`
+- Open PRs into `dev` (squash merge); merge `dev` to `main` for releases
+
 ## License
 
 MIT