- Add flake.nix with buildGoModule for reproducible binary builds
- Provide dev shell with Go toolchain (go, gopls, gotools)
- Update README with Nix build and dev shell instructions
- Add MIT LICENSE file
Note: vendorHash is set to null - run `nix build` to generate actual hash
- Document features, configuration, and API endpoints
- Include request/response examples for streaming and non-streaming
- Explain field mapping between OpenAI and Anthropic formats
- Document security headers and claude-code mimicry
- Add project structure overview and build instructions
