Local-first frontier

Principles

1. Less dependency — prefer OS/Rust binaries over heavy npm ML
2. Zero config — works without API keys
3. Local first, cloud optional
4. Speed / size / performance
5. Rust first where engines exist

See product README + EVIDENCE_CONTRACT for surfaces.

Non-negotiable

1. Zero API key for default path
2. Prefer Rust native MCP when present
3. Few tools; primary path documented in TOOL_SURFACE.md
4. Cloud / LLM only optional and non-authority
5. Product SSOT is this repository only (no instruments monorepo)

Zero-config CTA

npx -y @sylphx/citra

Bare invoke starts brand-sole MCP on stdio. Live: the latest @sylphx/citra on npm.