Contributors need a visible path for local verification instead of relying on design notes or maintainer memory. Add a GitHub-facing CONTRIBUTING entrypoint, bilingual docs pages, README links, and VitePress sidebar navigation for PR gates, live model baselines, provider selection, reports, and release checks.
Constraint: Live baseline providers are local machine state; docs must tell contributors how to list and choose their own providers without maintainer UUIDs.
Rejected: Keep the instructions only in the quality-gate design doc | too hidden for clone-and-contribute workflows
Confidence: high
Scope-risk: narrow
Directive: Keep quality-gate commands documented wherever contributor onboarding links are exposed.
Tested: bun run check:docs
Tested: bun run quality:pr
Not-tested: live baseline after the docs-only wording change
