v2.3.0

Added

• Codex CLI support. This repo's Skills are now loadable from OpenAI's Codex CLI, not just Claude Code — with zero changes to any Knowledge Contract, Skill, Reference, or Workflow. Design in rfcs/0002-codex-support.md.
  • .codex-plugin/plugin.json — Codex plugin manifest, skills field points at the existing skills/ directory as a whole. No per-domain translation file: Codex reads the same SKILL.mds Claude Code does. Corrects a stale assumption in docs/specifications/skill-spec.md (and, discovered mid-implementation, an identical stale claim in CLAUDE.md) that a per-domain skills/<domain>/agents/openai.yaml would eventually be needed.
  • .codex/INSTALL.md — two install paths: Codex's own plugin marketplace command, and a manual clone-and-symlink fallback (with Windows PowerShell equivalents for every step, including verify and uninstall).
  • npx/bin/install.js — when the claude CLI is absent but codex is present, prints Codex install instructions (pointing at the install doc's absolute GitHub URL, since an npx user hasn't cloned the repo) and exits 0, instead of erroring. Never spawns codex itself — its plugin install is interactive, run inside a Codex session, not scriptable.
  • README.md/npx/README.md — Installation section now mentions Codex support and links to the install doc.
  • .codex-plugin/plugin.json joins the release-version consistency check CLAUDE.md defines (five files → six); a pre-existing "four-file" miscount in the same paragraph (it said "four" while already listing five) is corrected to "six" alongside it.