feat: version_skew checks compatibility floor vs newest release tag#96
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The old version_skew compared a workspace's recorded pin (workspace_version / version.txt) against the library __init__.py __version__ stamp. Both artifacts are now frozen — releases no longer commit either back to main (PyAutoConf#119 / PyAutoBuild#121) — so the check was inert: permanently MATCH on stale values, unfailable by any release. Re-point it at the live invariant (build-chain #155 Phase 4 task 2, fork (b) "mains authoritative"): each workspace's version.minimum_library_version floor vs the newest YYYY.M.D.B git tag on its library. Flag UNSATISFIABLE (RED) when a floor exceeds the newest released version — no installable release can satisfy it (the one invariant nothing guarded before); OK when satisfiable; UNKNOWN (STALE) when the newest release can't be resolved; BAD on unparseable input. Drops the now-obsolete AHEAD/BEHIND/MISMATCH legs. No library import, no network — reads local git tags only, inside the <30s tick budget. Also updates readiness.py (RED/STALE mapping + score key skew_unsatisfiable), dashboard.py rendering, capabilities.yaml gate_role, and the test suites. Yank-awareness (does the floor name a yanked release) is noted as a deeper, non-tick check left for follow-up. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Vx4gezFDNdXP39Q8WzqnTA
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Why
Under the pre-2026-07 model
version_skewcompared a workspace's recorded pin (workspace_version/version.txt) against the library__init__.py__version__stamp. Both artifacts are now frozen — releases no longer commit either back tomain(PyAutoConf#119 / PyAutoBuild#121, which removed the daily "Update version to X" commits that drove the CI-storm / cron-pause incident). So the check was inert: permanently MATCH on stale values, unfailable by any release.Build-chain #155 Phase 4 task 2, fork (b) "mains authoritative".
What
Re-point the check at the live invariant — each workspace's
version.minimum_library_versionfloor vs the newestYYYY.M.D.Bgit tag on its library:UNSATISFIABLEOKUNKNOWNBADDrops the obsolete AHEAD / BEHIND / MISMATCH legs. Reads local git tags only — no library import, no network — so it stays inside the <30s tick budget.
Also updates
heart/readiness.py(RED/STALE mapping + score keyskew_unsatisfiable),heart/dashboard.pyrendering,health_agent/capabilities.yamlgate_role, and the test suites.Out of scope (noted for follow-up)
workspace_version/version.txtfrom the 7 workspaces (separate task, handled alongside this branch's workspace changes).Testing
Full Heart suite 289 passed. Live smoke against real checkouts: all floors
2026.7.9.1≤ newest release2026.7.19.1→ OK, floor-less workspaces skipped gracefully.🤖 Generated with Claude Code
https://claude.ai/code/session_01Vx4gezFDNdXP39Q8WzqnTA
Generated by Claude Code