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CONTRIBUTING.md

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+# Contributing
+
+Thank you for your interest in contributing to the OpenCode Obsidian plugin!
+
+## What We Accept
+
+We welcome the following types of contributions:
+
+- Bug fixes
+- Performance improvements
+- Documentation improvements
+
+**Note:** Core product features and major changes require prior discussion. Please [open an issue](https://github.com/mtymek/opencode-obsidian/issues) first to discuss your proposal before starting work. PRs for new features submitted without prior approval may be closed.
+
+I'm also interested in collecting a set of Agent Skills useful in the context of Obsidian vaults. Feel free to submit an issue or PR with your ideas.
+
+## Development Setup
+
+### Requirements
+
+- [Bun](https://bun.sh/) 1.3+
+- Obsidian (for testing the plugin)
+
+### Getting Started
+
+```bash
+git clone https://github.com/mtymek/opencode-obsidian.git
+cd opencode-obsidian
+bun install
+```
+
+### Development Workflow
+
+To work on the plugin during development:
+
+1. Build the plugin:
+   ```bash
+   bun run build  # One-time production build
+   ```
+
+2. The plugin will be built to `main.js` in the project root
+
+3. For testing in Obsidian:
+   - Enable Community Plugins in Obsidian settings
+   - Copy the built plugin to your vault's `.obsidian/plugins/opencode-obsidian/` directory
+   - Reload Obsidian or use the "Reload app without saving" command
+
+### Commands
+
+```bash
+bun install    # Install dependencies
+bun run build  # Production build with type checking
+bun test       # Run tests
+```
+
+## Before Submitting a PR
+
+1. Run `bun run build` to ensure type checking passes
+2. Run `bun test` to ensure all tests pass
+3. Test the plugin in Obsidian to verify functionality
+
+## Pull Requests
+
+1. Keep PRs small and focused on a single concern
+2. Explain what your PR is attempting to fix or improve
+3. Link any relevant issues in the PR description
+
+## License
+
+By contributing to the OpenCode Obsidian plugin, you agree to license your contribution under the [MIT License](LICENSE).