* Cache scan verdicts and drop policy-failing entries from bump PRs
Three changes that together let the nightly bump clear any backlog in a
single run without blocking on a single bad upstream or re-burning Claude
time on already-scanned SHAs:
- bump-plugin-shas.yml: raise max-bumps default 20 -> 130 (above the
external entry count, so a single run can clear a full backlog) and add
an explicit 60-min job timeout. The cap was the only thing bounding the
blast radius of a single policy failure; the changes below take over
that role so the cap can be lifted.
- scan-plugins.yml: add a verdict cache keyed on (plugin, sha, policy
hash). The bump action force-resets bump/plugin-shas every night, which
makes the same SHAs reappear in the diff on consecutive nights — without
the cache the scan would re-burn ~90s of Claude time per entry per
night. Cached verdicts (pass and fail) are served from disk; only
uncached SHAs are scanned. The job still fails on cached failures so
the required check stays honest.
- revert-failed-bumps.yml (new): after a Scan Plugins workflow_run on
bump/plugin-shas concludes with a failure, drop just the failing
entries' source.sha back to main's pin via a follow-up signed commit
and re-dispatch the scan. The re-dispatch finds only cached-pass
entries and goes green in seconds. Bounded at 3 passes/night, restricted
to SHA-only diffs, and aborts if the bump branch was tampered with.
* Harden bump cache and revert workflows after review
- revert-failed-bumps: replace the time-based revert budget (anchored on
the PR head, which a revert commit immediately replaces — never
accumulating past 1) with a commit count: every nightly bump force-
resets to one commit and every revert pass adds exactly one, so
commits > MAX+1 is the budget without date math, pagination, or
exposure to comment spoofing.
- revert-failed-bumps: filter the bump PR by head owner so a fork PR
with a branch named bump/plugin-shas can't be selected.
- revert-failed-bumps: continue-on-error on the artifact download so a
scan that died before uploading (infra error) doesn't fail the revert
job — the missing-file guard downstream handles it.
- scan-plugins: add a per-ref concurrency group so concurrent scans
don't lose one another's cache writes; key the cache on run_attempt
so a re-run can save its own verdicts.
- scan-plugins: store the full source object in the cache and require
source equality on lookup, so a repo/path change at the same SHA
misses the cache instead of getting a stale verdict.
- scan-plugins / revert-failed-bumps: strip markdown control chars,
wrap model-generated text in code spans (neutralizes auto-linked
URLs), and redact key-shaped tokens before they reach the step
summary, artifact, cache, or PR comment.
