Persistent Pattern Library + live mutation re-arming + pi-blitz
futures + Future Compose API + new CLI surfaces (doctor / patterns /
patterns --live / watch / bench --paired) + 30-sample paired-bench
evidence + the build-a-future contributor surface.

The v0.2 safety invariants are preserved as a strict superset.
See CHANGELOG.md for the full Known Limitations section, including
the pre-v0.3 history rewrite documented in .github/HISTORY.md.