v0.8.0

What's new

Added

• Token usage in _meta - codex / query responses carry _meta.usage
  (input/cached/output/reasoning token counts) from the exec turn.completed
  event. Absent when no usage is emitted. Dollar cost still not reported (CLI
  emits tokens, not cost).
• Release-coherence CI guard - scripts/check-changelog.mjs fails when
  package.json version has no matching CHANGELOG section, or server.json /
  package-lock.json disagree with it. Wired into CI + prepublishOnly.

Fixed

• turn.failed / error events now surface as MCP errors (#31, #32, #33)
  instead of an empty success. Covers codex, query, search, structured,
  and review.
• Model fallback catches rate limits reported on stdout (#35): a rate-limited
  turn.failed with exit 0 and clean stderr now retries the fallback model.

Full Changelog: v0.7.0...v0.8.0