diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..a673b83
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,380 @@
+# Contributing to Obsidian MCP Server Plugin
+
+Thank you for your interest in contributing to the Obsidian MCP Server Plugin! This document provides guidelines and information for contributors.
+
+## Table of Contents
+
+- [Code of Conduct](#code-of-conduct)
+- [Getting Started](#getting-started)
+- [Development Setup](#development-setup)
+- [Development Workflow](#development-workflow)
+- [Code Guidelines](#code-guidelines)
+- [Testing Guidelines](#testing-guidelines)
+- [Submitting Changes](#submitting-changes)
+- [Release Process](#release-process)
+
+## Code of Conduct
+
+We are committed to providing a welcoming and inclusive environment. Please be respectful and constructive in all interactions.
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js (v16 or higher)
+- npm
+- Obsidian desktop app installed
+- Basic understanding of TypeScript and Obsidian plugin development
+
+### Reporting Issues
+
+Found a bug or have a feature request? Please open an issue on GitHub:
+
+**GitHub Issues:** https://github.com/Xe138/obsidian-mcp-server/issues
+
+When reporting bugs, please include:
+- Obsidian version
+- Plugin version
+- Operating system
+- Steps to reproduce the issue
+- Any error messages from the Developer Console (Ctrl+Shift+I / Cmd+Option+I)
+- Expected behavior vs. actual behavior
+
+For feature requests, please describe:
+- The use case or problem you're trying to solve
+- Your proposed solution
+- Any alternatives you've considered
+
+## Development Setup
+
+1. **Fork and clone the repository:**
+   ```bash
+   git clone https://github.com/YOUR_USERNAME/obsidian-mcp-server.git
+   cd obsidian-mcp-server
+   ```
+
+2. **Install dependencies:**
+   ```bash
+   npm install
+   ```
+
+3. **Link to your vault for testing:**
+
+   Create a symlink from your vault's plugins folder to your development directory:
+
+   **Linux/macOS:**
+   ```bash
+   ln -s /path/to/your/dev/obsidian-mcp-server /path/to/vault/.obsidian/plugins/obsidian-mcp-server
+   ```
+
+   **Windows (Command Prompt as Administrator):**
+   ```cmd
+   mklink /D "C:\path\to\vault\.obsidian\plugins\obsidian-mcp-server" "C:\path\to\your\dev\obsidian-mcp-server"
+   ```
+
+4. **Start development build:**
+   ```bash
+   npm run dev
+   ```
+
+   This runs esbuild in watch mode, automatically rebuilding when you save changes.
+
+5. **Enable the plugin in Obsidian:**
+   - Open Obsidian Settings → Community Plugins
+   - Enable the plugin
+   - Reload Obsidian when prompted (Ctrl/Cmd + R in dev mode)
+
+## Development Workflow
+
+### Making Changes
+
+1. **Create a feature branch:**
+   ```bash
+   git checkout -b feature/your-feature-name
+   ```
+
+   Use descriptive branch names:
+   - `feature/add-tool-xyz` for new features
+   - `fix/issue-123` for bug fixes
+   - `docs/update-readme` for documentation
+   - `refactor/cleanup-utils` for refactoring
+
+2. **Make your changes:**
+   - Write code following our [Code Guidelines](#code-guidelines)
+   - Add tests for new functionality
+   - Update documentation as needed
+
+3. **Test your changes:**
+   ```bash
+   npm test                 # Run all tests
+   npm run test:watch      # Run tests in watch mode
+   npm run test:coverage   # Check coverage
+   ```
+
+4. **Build and test in Obsidian:**
+   ```bash
+   npm run build
+   ```
+
+   Then reload Obsidian (Ctrl/Cmd + R) to test your changes.
+
+5. **Commit your changes:**
+   ```bash
+   git add .
+   git commit -m "Add concise, descriptive commit message"
+   ```
+
+   See [Commit Message Guidelines](#commit-message-guidelines) below.
+
+### Commit Message Guidelines
+
+Write clear, concise commit messages that explain **why** the change was made, not just what changed:
+
+**Good examples:**
+- `fix: prevent race condition in concurrent note updates`
+- `feat: add support for Excalidraw compressed format`
+- `refactor: extract path validation into shared utility`
+- `docs: clarify API key security in README`
+- `test: add coverage for frontmatter edge cases`
+
+**Structure:**
+- Use imperative mood ("add" not "added" or "adds")
+- Keep the first line under 72 characters
+- Add a blank line followed by details if needed
+- Reference issue numbers when applicable: `fixes #123`
+
+**Type prefixes:**
+- `feat:` - New feature
+- `fix:` - Bug fix
+- `refactor:` - Code restructuring without behavior change
+- `test:` - Adding or updating tests
+- `docs:` - Documentation changes
+- `style:` - Formatting, no code change
+- `perf:` - Performance improvement
+- `chore:` - Maintenance tasks
+
+## Code Guidelines
+
+### Code Organization Best Practices
+
+- **Keep `main.ts` minimal** - Focus only on plugin lifecycle (onload, onunload, command registration)
+- **Delegate feature logic to separate modules** - All functionality lives in dedicated modules under `src/`
+- **Split large files** - If any file exceeds ~200-300 lines, break it into smaller, focused modules
+- **Use clear module boundaries** - Each file should have a single, well-defined responsibility
+
+### TypeScript Guidelines
+
+- **Use TypeScript strict mode** - The project uses `"strict": true`
+- **Provide explicit types** - Avoid `any`; use proper types or `unknown`
+- **Prefer interfaces over type aliases** for object shapes
+- **Use readonly** where appropriate to prevent mutations
+- **Export types** from `src/types/` for shared definitions
+
+### Style Guidelines
+
+- **Use sentence case** for UI strings, headings, and button text
+- **Use arrow notation** for navigation paths: "Settings → Community plugins"
+- **Prefer "select"** over "click" in documentation
+- **Use 4 spaces** for indentation (not tabs)
+- **Keep lines under 100 characters** where reasonable
+- **Use single quotes** for strings (unless templating)
+- **Add trailing commas** in multiline arrays/objects
+
+### Architecture Patterns
+
+- **Prefer async/await** over promise chains
+- **Handle errors gracefully** - Provide helpful error messages via ErrorMessages utility
+- **Use dependency injection** - Pass dependencies (vault, app) to constructors
+- **Avoid global state** - Encapsulate state within classes
+- **Keep functions small** - Each function should do one thing well
+
+### Performance Considerations
+
+- **Keep startup light** - Defer heavy work until needed; avoid long-running tasks during `onload`
+- **Batch disk access** - Avoid excessive vault scans
+- **Debounce/throttle expensive operations** - Especially for file system event handlers
+- **Cache when appropriate** - But invalidate caches correctly
+
+### Security Guidelines
+
+- **Default to local/offline operation** - This plugin binds to localhost only
+- **Never execute remote code** - Don't fetch and eval scripts
+- **Minimize scope** - Read/write only what's necessary inside the vault
+- **Do not access files outside the vault**
+- **Respect user privacy** - Don't collect vault contents without explicit consent
+- **Clean up resources** - Use `this.register*` helpers so the plugin unloads safely
+
+### Platform Compatibility
+
+This plugin is **desktop-only** (`isDesktopOnly: true`) because it uses Node.js HTTP server (Express). When extending functionality:
+- Avoid mobile-incompatible APIs
+- Don't assume desktop-only file system behavior
+- Consider graceful degradation where applicable
+
+## Testing Guidelines
+
+### Writing Tests
+
+- **Write tests for new features** - All new functionality should include tests
+- **Write tests for bug fixes** - Add a regression test that would have caught the bug
+- **Test edge cases** - Empty strings, null values, missing files, concurrent operations
+- **Use descriptive test names** - Explain what's being tested and expected behavior
+
+### Test Structure
+
+Tests are located in `tests/` and use Jest with ts-jest:
+
+```typescript
+describe('ToolName', () => {
+  describe('methodName', () => {
+    it('should do something specific', async () => {
+      // Arrange - Set up test data and mocks
+      const input = 'test-input';
+
+      // Act - Execute the code under test
+      const result = await someFunction(input);
+
+      // Assert - Verify the results
+      expect(result).toBe('expected-output');
+    });
+  });
+});
+```
+
+### Running Tests
+
+```bash
+npm test                 # Run all tests once
+npm run test:watch      # Watch mode for development
+npm run test:coverage   # Generate coverage report
+```
+
+### Mock Guidelines
+
+- Use the existing Obsidian API mocks in `tests/__mocks__/obsidian.ts`
+- Add new mocks when needed, keeping them minimal and focused
+- Reset mocks between tests to avoid test pollution
+
+## Submitting Changes
+
+### Pull Request Process
+
+1. **Ensure your code builds and tests pass:**
+   ```bash
+   npm run build
+   npm test
+   ```
+
+2. **Update documentation:**
+   - Update `README.md` if you've changed functionality or added features
+   - Update `CLAUDE.md` if you've changed architecture or development guidelines
+   - Add/update JSDoc comments for public APIs
+
+3. **Push your branch:**
+   ```bash
+   git push origin feature/your-feature-name
+   ```
+
+4. **Open a Pull Request on GitHub:**
+   - Provide a clear title and description
+   - Reference related issues (e.g., "Fixes #123")
+   - Explain what changed and why
+   - List any breaking changes
+   - Include screenshots for UI changes
+
+5. **Respond to review feedback:**
+   - Address reviewer comments
+   - Push additional commits to the same branch
+   - Mark conversations as resolved when addressed
+
+### Pull Request Checklist
+
+Before submitting, ensure:
+- [ ] Code builds without errors (`npm run build`)
+- [ ] All tests pass (`npm test`)
+- [ ] New functionality includes tests
+- [ ] Documentation is updated
+- [ ] Code follows style guidelines
+- [ ] Commit messages are clear and descriptive
+- [ ] No build artifacts committed (`main.js`, `node_modules/`)
+- [ ] Branch is up to date with `master`
+
+## Release Process
+
+**Note:** Releases are managed by the maintainers. This section is for reference.
+
+### Versioning
+
+We use [Semantic Versioning](https://semver.org/):
+- **Major** (1.0.0): Breaking changes
+- **Minor** (0.1.0): New features, backward compatible
+- **Patch** (0.0.1): Bug fixes, backward compatible
+
+### Automated Release Workflow
+
+This project uses GitHub Actions to automate releases. The workflow is triggered when a semantic version tag is pushed.
+
+**Location:** `.github/workflows/release.yml`
+
+**Workflow process:**
+1. Validates version consistency across `package.json`, `manifest.json`, and git tag
+2. Runs full test suite (blocks release if tests fail)
+3. Builds plugin with production config (`npm run build`)
+4. Verifies build artifacts (`main.js`, `manifest.json`, `styles.css`)
+5. Creates draft GitHub release with artifacts attached
+
+### Release Steps for Maintainers
+
+1. **Update version numbers:**
+   ```bash
+   npm version [major|minor|patch]
+   ```
+
+   This automatically updates `package.json`, `manifest.json`, and `versions.json` via the `version-bump.mjs` script.
+
+2. **Update CHANGELOG.md** with release notes
+
+3. **Commit and tag:**
+   ```bash
+   git commit -m "chore: bump version to X.Y.Z"
+   git tag X.Y.Z
+   git push origin master --tags
+   ```
+
+   **Important:** Tags must match the format `X.Y.Z` (e.g., `1.2.3`) without a `v` prefix.
+
+4. **GitHub Actions creates draft release:**
+   - The workflow automatically builds and creates a draft release
+   - Wait for the workflow to complete (check Actions tab)
+
+5. **Publish the release:**
+   - Go to GitHub Releases
+   - Review the draft release
+   - Verify attached files (`main.js`, `manifest.json`, `styles.css`)
+   - Replace the placeholder release notes with actual notes from CHANGELOG
+   - Publish the release
+
+### Stability Guidelines
+
+- **Never change the plugin `id`** after release
+- **Never rename command IDs** after release - they are stable API
+- **Deprecate before removing** - Give users time to migrate
+- **Document breaking changes** clearly in CHANGELOG
+- **Tags must be semantic version format** - `X.Y.Z` without `v` prefix
+- **All versions must match** - `package.json`, `manifest.json`, and git tag must have identical versions
+
+## Getting Help
+
+If you need help or have questions:
+
+- **Documentation:** Check `CLAUDE.md` for detailed architecture information
+- **Issues:** Search existing issues or open a new one
+- **Discussions:** Start a discussion on GitHub for questions or ideas
+
+## Recognition
+
+Contributors will be acknowledged in release notes and the README. Thank you for helping improve this plugin!
+
+## License
+
+By contributing, you agree that your contributions will be licensed under the MIT License.