Add comprehensive CI documentation to README files

Co-authored-by: dwinkler1 <22460147+dwinkler1@users.noreply.github.com>

README.md

@@ -0,0 +1,70 @@
+# Nix Project Templates (np)
+
+A collection of Nix flake templates for reproducible development environments.
+
+## Templates
+
+### RDE (Research Development Environment)
+
+The default template for data science and research projects with support for R, Python, and Julia.
+
+**Quick start:**
+```bash
+nix flake init -t github:dwinkler1/np#rde
+nix develop
+```
+
+**Features:**
+- 🔬 Multi-language support (R, Python, Julia)
+- 📦 Reproducible with Nix
+- 🎨 Neovim-based IDE with LSP support
+- 📊 Research-focused workflows
+- 🔧 Modular and customizable
+
+See [templates/rde/README.md](templates/rde/README.md) for full documentation.
+
+## CI/CD
+
+All templates are automatically tested to ensure functionality:
+
+- **Build Tests**: Templates build successfully on Linux and macOS
+- **Functionality Tests**: All commands and language support are verified
+- **Configuration Tests**: Multiple configurations (R, Python, Julia) are tested
+- **Automated Updates**: Dependencies are updated daily via automated PRs
+
+### CI Workflows
+
+- `.github/workflows/check.yml` - Comprehensive functionality tests (Ubuntu)
+- `.github/workflows/check_macos.yml` - macOS compatibility tests
+- `.github/workflows/update.yml` - Automated dependency updates
+
+## Usage
+
+1. **Initialize a new project:**
+   ```bash
+   nix flake init -t github:dwinkler1/np#rde
+   ```
+
+2. **Enter development environment:**
+   ```bash
+   nix develop
+   # or with direnv
+   echo "use flake" > .envrc && direnv allow
+   ```
+
+3. **Start working:**
+   ```bash
+   p-initProject  # Create project structure
+   p              # Launch Neovim
+   ```
+
+## Contributing
+
+Contributions are welcome! Please ensure:
+- All templates pass CI tests
+- Documentation is updated for new features
+- Code follows existing patterns
+
+## License
+
+See [LICENSE](LICENSE) file for details.

templates/rde/README.md

@@ -337,6 +337,36 @@ p-updateDeps
 # Or check overlays/r.nix for package name
 ```
 
+## CI and Testing
+
+This template is automatically tested on every change to ensure all functionality works correctly. The CI workflow (`.github/workflows/check.yml`) runs comprehensive tests including:
+
+### Default Configuration Tests (R enabled)
+- ✅ Template builds successfully
+- ✅ Flake check passes
+- ✅ Development shell enters without errors
+- ✅ Neovim launches in headless mode
+- ✅ R console is available and runs code
+- ✅ Utility commands (initProject, updateDeps) are available
+- ✅ Project structure creation works correctly
+
+### Python Configuration Tests
+- ✅ Template builds with Python enabled
+- ✅ Python commands (p-py, p-ipy, p-initPython) are available
+- ✅ Python interpreter launches and executes code
+
+### Julia Configuration Tests
+- ✅ Template builds with Julia enabled
+- ✅ Julia commands (p-jl, p-initJl) are available
+- ✅ Julia REPL launches and executes code
+
+The CI runs on:
+- Every push to template files (`.nix`, `.sh`, `.lua`, `flake.lock`)
+- Every pull request affecting the template
+- Manual dispatch for testing
+
+This ensures that users can confidently use the template knowing that all advertised functionality has been verified.
+
 ## Related Documentation
 
 - [REFACTORING.md](REFACTORING.md) - Technical details about the modular structure