Initial public release

CONTRIBUTING.md

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+# Contributing to OpenChamber
+
+## Quick Start
+
+```bash
+git clone https://github.com/btriapitsyn/openchamber.git
+cd openchamber
+pnpm install
+pnpm run dev:web:full    # Web development
+pnpm run desktop:dev     # Desktop development (Tauri)
+```
+
+## Before Submitting
+
+```bash
+pnpm -r type-check   # Must pass
+pnpm -r lint         # Must pass
+pnpm -r build        # Must succeed
+```
+
+## Code Style
+
+- Functional React components only
+- TypeScript strict mode - no `any` without justification
+- Use existing theme colors/typography - don't add new ones
+- Components must support light and dark themes
+
+## Pull Requests
+
+1. Fork and create a branch
+2. Make changes
+3. Run validation commands above
+4. Submit PR with clear description of what and why
+
+## Project Structure
+
+See [AGENTS.md](./AGENTS.md) for detailed architecture reference.
+
+## Questions?
+
+Open an issue.