The RQML command-line interface (the `rqml` command): validate, status, and the deterministic check gate for .rqml requirements documents. The universal substrate every RQML integration can invoke.

The RQML engine: parse, serialize, validate (XSD + referential integrity), lint, trace, coverage, and drift for .rqml requirements documents. The dependency-clean library every RQML surface reuses.

Model Context Protocol server exposing the RQML engine (@rqml/core) as agent tools: validate, status, check, trace, show, impact, link, and skeleton.

Canonical RQML XSD schemas (the single source of truth), example documents, and the AGENTS.md template, with a typed version resolver. Schema text is inlined for offline, bundler-friendly consumption.

Make opencode code from requirements, not guesswork: anchor every session on the spec, hard-gate edits to unapproved-requirement code at the tool boundary, and surface the deterministic rqml check verdict (CI authoritative).