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@@ -7,6 +7,19 @@ name: Scan Plugins
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# PRs blocked forever — so this workflow runs on every PR and skips the heavy
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# scan setup at the step level when nothing scan-relevant changed. The check
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# always reports.
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+#
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+# Verdict cache: each (plugin, sha) pair is scanned at most once. The bump
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+# workflow force-resets bump/plugin-shas every night, which makes the same
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+# SHAs reappear in the diff on consecutive nights — without a cache, the
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+# scan would re-burn ~90s of Claude time per entry per night. The cache is
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+# keyed on the policy hash so a prompt or schema change invalidates all
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+# verdicts and triggers a clean re-scan.
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+#
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+# Failure handling: a cached `passes:false` verdict still fails the job. The
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+# Revert Failed Bumps workflow (revert-failed-bumps.yml) reacts to that by
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+# dropping the failing entries from the bump PR, so one bad upstream can't
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+# block the rest. After the revert, the re-dispatched scan finds only
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+# cached-pass entries and goes green in seconds.
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on:
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pull_request:
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@@ -20,6 +33,11 @@ on:
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permissions:
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contents: read
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+env:
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+ MARKETPLACE: .claude-plugin/marketplace.json
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+ CACHE_DIR: ${{ github.workspace }}/.scan-cache
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+ CACHE_TTL_DAYS: '30'
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+
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jobs:
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scan:
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runs-on: ubuntu-latest
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@@ -37,11 +55,14 @@ jobs:
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EVENT_NAME: ${{ github.event_name }}
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BASE_SHA: ${{ github.event.pull_request.base.sha }}
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run: |
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+ set -euo pipefail
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if [[ "$EVENT_NAME" == "workflow_dispatch" ]]; then
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echo "relevant=true" >> "$GITHUB_OUTPUT"
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+ echo "base_ref=origin/main" >> "$GITHUB_OUTPUT"
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exit 0
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fi
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- if git diff --quiet "$BASE_SHA" HEAD -- .claude-plugin/marketplace.json .github/policy/; then
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+ echo "base_ref=$BASE_SHA" >> "$GITHUB_OUTPUT"
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+ if git diff --quiet "$BASE_SHA" HEAD -- "$MARKETPLACE" .github/policy/; then
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echo "relevant=false" >> "$GITHUB_OUTPUT"
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echo "::notice::No changes to marketplace.json or policy/ — skipping policy scan."
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else
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@@ -61,13 +82,263 @@ jobs:
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exit 1
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fi
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- # Blocking: policy failures fail the job. Loosen by removing
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- # fail-on-findings if the false-positive rate is too high.
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- - if: steps.changes.outputs.relevant == 'true'
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+ # Verdict cache, keyed on the policy content hash. A prompt change
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+ # invalidates every cached verdict — that is intentional. The save key
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+ # includes run_id so each run writes a fresh cache; restore-keys picks
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+ # the most recent one. Verdicts older than CACHE_TTL_DAYS are pruned on
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+ # restore to bound cache size as the marketplace grows.
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+ - name: Restore verdict cache
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+ if: steps.changes.outputs.relevant == 'true'
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+ id: cache-restore
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+ uses: actions/cache/restore@v4
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+ with:
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+ path: .scan-cache
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+ key: scan-verdicts-${{ hashFiles('.github/policy/**') }}-${{ github.run_id }}
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+ restore-keys: |
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+ scan-verdicts-${{ hashFiles('.github/policy/**') }}-
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+
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+ # Split the diff into cached (skip) and uncached (scan) entries. The
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+ # cache key is "<name>@<sha>" — a SHA is immutable, so a verdict for a
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+ # given (plugin, sha) is permanent under a fixed policy.
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+ - name: Filter scan targets against cache
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+ if: steps.changes.outputs.relevant == 'true'
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+ id: filter
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+ env:
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+ BASE_REF: ${{ steps.changes.outputs.base_ref }}
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+ SCAN_ALL: ${{ inputs.scan_all || 'false' }}
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+ TTL_DAYS: ${{ env.CACHE_TTL_DAYS }}
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+ run: |
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+ set -euo pipefail
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+ mkdir -p "$CACHE_DIR"
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+
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+ # Initialize / prune the verdict map.
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+ if [[ -f "$CACHE_DIR/verdicts.json" ]] && jq -e 'type == "object"' "$CACHE_DIR/verdicts.json" >/dev/null 2>&1; then
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+ # Drop entries older than TTL. Verdicts are immutable per (plugin, sha)
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+ # but pruning keeps the cache from accumulating forever.
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+ cutoff="$(date -u -d "-${TTL_DAYS} days" +%Y-%m-%dT%H:%M:%SZ)"
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+ jq --arg cutoff "$cutoff" \
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+ 'with_entries(select(.value.scanned_at >= $cutoff))' \
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+ "$CACHE_DIR/verdicts.json" > "$CACHE_DIR/verdicts.json.tmp"
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+ mv "$CACHE_DIR/verdicts.json.tmp" "$CACHE_DIR/verdicts.json"
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+ else
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+ echo '{}' > "$CACHE_DIR/verdicts.json"
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+ fi
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+
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+ # Build the change set: entries in HEAD whose object differs from base.
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+ # scan_all overrides to "every external entry" (full re-review).
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+ if [[ "$SCAN_ALL" == "true" ]]; then
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+ jq -c '[.plugins[] | select(.source | type == "object")]' "$MARKETPLACE" \
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+ > "$CACHE_DIR/changed.json"
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+ else
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+ if git cat-file -e "${BASE_REF}:${MARKETPLACE}" 2>/dev/null; then
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+ git show "${BASE_REF}:${MARKETPLACE}" > "$CACHE_DIR/base.json"
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+ else
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+ echo '{"plugins":[]}' > "$CACHE_DIR/base.json"
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+ fi
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+ jq -c -s \
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+ '(.[0].plugins | map({(.name): .}) | add // {}) as $b
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+ | [.[1].plugins[]
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+ | select(.source | type == "object")
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+ | select(($b[.name] // null) != .)]' \
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+ "$CACHE_DIR/base.json" "$MARKETPLACE" > "$CACHE_DIR/changed.json"
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+ fi
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+
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+ changed_count="$(jq 'length' "$CACHE_DIR/changed.json")"
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+
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+ # Split changed entries into cached vs uncached.
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+ jq -c -s \
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+ '.[0] as $cache
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+ | (.[1] | map(. + {key: (.name + "@" + (.source.sha // "")) })) as $entries
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+ | {
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+ to_scan: [$entries[] | select(($cache[.key] // null) == null)],
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+ cached: [$entries[] | select(($cache[.key] // null) != null)
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+ | . + {verdict: $cache[.key]}]
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+ }' \
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+ "$CACHE_DIR/verdicts.json" "$CACHE_DIR/changed.json" > "$CACHE_DIR/split.json"
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+
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+ jq -c '.to_scan' "$CACHE_DIR/split.json" > "$CACHE_DIR/to-scan.json"
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+ jq -c '.cached' "$CACHE_DIR/split.json" > "$CACHE_DIR/cached.json"
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+
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+ to_scan_count="$(jq 'length' "$CACHE_DIR/to-scan.json")"
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+ cached_count="$(jq 'length' "$CACHE_DIR/cached.json")"
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+ cached_fail_count="$(jq '[.[] | select(.verdict.passes == false)] | length' "$CACHE_DIR/cached.json")"
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+
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+ # Build a filtered marketplace containing only the uncached entries.
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+ # Passing this as the action's marketplace-path means the action's own
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+ # base diff (which can't resolve a path outside git) falls back to an
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+ # empty base and scans everything in the file — which is exactly the
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+ # to-scan set. Annotations point to the temp file rather than the real
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+ # marketplace, but the per-entry verdicts still land in the artifact
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+ # and the step summary.
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+ jq -c '{plugins: .}' "$CACHE_DIR/to-scan.json" > "$CACHE_DIR/scan-targets.json"
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+
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+ {
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+ echo "changed=$changed_count"
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+ echo "to_scan=$to_scan_count"
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+ echo "cached=$cached_count"
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+ echo "cached_failures=$cached_fail_count"
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+ } >> "$GITHUB_OUTPUT"
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+
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+ echo "::notice::$changed_count changed entrie(s): $cached_count cached ($cached_fail_count failing), $to_scan_count to scan."
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+
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+ - name: Scan uncached entries
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+ if: steps.changes.outputs.relevant == 'true' && steps.filter.outputs.to_scan != '0'
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+ id: scan
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+ # Capture the action's per-entry outputs even when it exits nonzero.
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+ # The verdict (cached + fresh) is what gates the job, not the action's
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+ # exit code, and the revert workflow needs the artifact even on failure.
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+ continue-on-error: true
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uses: anthropics/claude-plugins-community/.github/actions/scan-plugins@b277757588871fe55b2620de8c6dfda470e2e9d8
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with:
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anthropic-api-key: ${{ secrets.ANTHROPIC_API_KEY }}
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+ marketplace-path: .scan-cache/scan-targets.json
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policy-prompt: .github/policy/prompt.md
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fail-on-findings: "true"
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- scan-all-external: ${{ inputs.scan_all || 'false' }}
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claude-cli-version: latest
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+
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+ # Merge fresh verdicts into the cache and assemble this run's full
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+ # verdict set (cached + fresh) for downstream consumers. Runs even when
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+ # the scan step failed so that fail verdicts are also cached — that is
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+ # what lets the revert workflow drop them and what stops the same
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+ # failing SHA from being re-scanned every night.
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+ - name: Merge verdicts and assemble run report
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+ if: steps.changes.outputs.relevant == 'true'
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+ id: report
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+ # The action's `scanned` output travels here via an env var, which is
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+ # subject to the OS argv/envp size limit (~128 KiB on Linux). At ~300
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+ # bytes/entry that is ~400 entries — an order of magnitude above the
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+ # cold-start case, and steady state with the cache is ~10/night. If
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+ # the limit is ever hit the runner fails the step before the script
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+ # runs ("argument list too long") — the right response is to clear
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+ # the cache key and lower max-bumps temporarily. Documented here so
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+ # nobody has to rediscover it.
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+ env:
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+ SCANNED_JSON: ${{ steps.scan.outputs.scanned || '[]' }}
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+ run: |
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+ set -euo pipefail
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+ mkdir -p "$CACHE_DIR"
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+ [[ -f "$CACHE_DIR/cached.json" ]] || echo '[]' > "$CACHE_DIR/cached.json"
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+ [[ -f "$CACHE_DIR/changed.json" ]] || echo '[]' > "$CACHE_DIR/changed.json"
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+
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+ # Defensive: a partial or unparseable action output must not poison
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+ # the cache. Treat it as "scanned nothing".
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+ printf '%s' "$SCANNED_JSON" > "$CACHE_DIR/scanned-raw.json"
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+ if ! jq -e 'type == "array"' "$CACHE_DIR/scanned-raw.json" >/dev/null 2>&1; then
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+ echo "::warning::scan action output is not a valid JSON array — treating as empty."
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+ echo '[]' > "$CACHE_DIR/scanned-raw.json"
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+ fi
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+
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+ now="$(date -u +%Y-%m-%dT%H:%M:%SZ)"
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+
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+ # The action's `scanned` output has no SHA — join it with the change
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+ # set by name to recover the SHA for the cache key.
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+ jq -c -s --arg now "$now" \
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+ '.[0] as $changed
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+ | (.[1] // []) as $scanned
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+ | ($changed | map({(.name): .source.sha}) | add // {}) as $shas
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+ | [$scanned[] | . + {sha: ($shas[.name] // ""), scanned_at: $now}]' \
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+ "$CACHE_DIR/changed.json" "$CACHE_DIR/scanned-raw.json" \
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+ > "$CACHE_DIR/fresh.json"
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+
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+ # Merge fresh verdicts into the cache, keyed by name@sha. Existing
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+ # entries are preserved; new entries are added or overwrite stale
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+ # ones for the same key (a re-scan after a flaky verdict).
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+ jq -c -s \
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+ '.[0] + ([.[1][] | select(.sha != "") | {(.name + "@" + .sha): {
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+ passes: .passes,
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+ summary: (.summary // ""),
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+ violations: (.violations // ""),
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+ scanned_at: .scanned_at
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+ }}] | add // {})' \
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+ "$CACHE_DIR/verdicts.json" "$CACHE_DIR/fresh.json" \
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+ > "$CACHE_DIR/verdicts.json.tmp"
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+ mv "$CACHE_DIR/verdicts.json.tmp" "$CACHE_DIR/verdicts.json"
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+
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+ # The full per-entry verdict for THIS run's diff: cached verdicts
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+ # plus freshly-scanned verdicts. The revert workflow consumes the
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+ # `failed` list to know exactly which SHAs to drop.
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+ jq -c -s \
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+ '(.[0] | map({name, sha: .source.sha, passes: .verdict.passes,
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+ summary: (.verdict.summary // ""),
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+ violations: (.verdict.violations // ""),
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+ source: "cache"}))
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+ + (.[1] | map({name, sha, passes,
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+ summary: (.summary // ""),
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+ violations: (.violations // ""),
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+ source: "scan"}))' \
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+ "$CACHE_DIR/cached.json" "$CACHE_DIR/fresh.json" \
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+ > "$CACHE_DIR/run-verdicts.json"
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+
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+ jq -c '[.[] | select(.passes == false) | .name]' "$CACHE_DIR/run-verdicts.json" \
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+ > "$CACHE_DIR/run-failed.json"
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+
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+ fail_count="$(jq 'length' "$CACHE_DIR/run-failed.json")"
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+ total="$(jq 'length' "$CACHE_DIR/run-verdicts.json")"
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+
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+ {
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+ echo "failed_count=$fail_count"
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+ echo "total=$total"
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+ } >> "$GITHUB_OUTPUT"
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+
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+ {
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+ echo "## Policy scan (with verdict cache)"
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+ echo
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+ echo "Changed entries: ${total} · cached: $(jq 'length' "$CACHE_DIR/cached.json") · scanned fresh: $(jq 'length' "$CACHE_DIR/fresh.json") · failures: ${fail_count}"
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+ echo
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+ if [[ "$total" -gt 0 ]]; then
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+ echo "| Plugin | SHA | Passes | Source | Summary |"
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+ echo "|---|---|---|---|---|"
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+ jq -r '.[] | "| \(.name) | `\(.sha[0:8])` | \(if .passes then "✅" else "❌" end) | \(.source) | \(.summary | .[0:120]) |"' \
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+ "$CACHE_DIR/run-verdicts.json"
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+ fi
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+ if [[ "$fail_count" -gt 0 ]]; then
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+ echo
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+ echo "### Violations"
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+ jq -r '.[] | select(.passes == false) | "- **\(.name)** — \(.violations)"' "$CACHE_DIR/run-verdicts.json"
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+ fi
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+ } >> "$GITHUB_STEP_SUMMARY"
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+
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+ # Used by revert-failed-bumps.yml to know which entries to drop. Always
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+ # uploaded when relevant so the revert workflow can distinguish "scan
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+ # found policy failures" from "scan never ran" (infra error → no revert).
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+ - name: Upload scan verdicts artifact
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+ if: steps.changes.outputs.relevant == 'true'
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+ uses: actions/upload-artifact@v4
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+ with:
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+ name: scan-verdicts
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+ path: |
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+ .scan-cache/run-verdicts.json
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+ .scan-cache/run-failed.json
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+ retention-days: 7
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+
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+ # Save even when the scan failed — fail verdicts are what stop us from
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+ # re-burning Claude time on a known-bad SHA every night.
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+ - name: Save verdict cache
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+ if: always() && steps.changes.outputs.relevant == 'true'
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+ uses: actions/cache/save@v4
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+ with:
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+ path: .scan-cache
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+ key: scan-verdicts-${{ hashFiles('.github/policy/**') }}-${{ github.run_id }}
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+
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+ # Required-check gate. Fails on either fresh or cached policy failures —
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+ # a known-bad SHA must keep failing until it is reverted or upstream
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+ # fixes it (a new SHA is a new cache key and gets a fresh scan).
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+ - name: Gate on policy verdict
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+ if: steps.changes.outputs.relevant == 'true'
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+ env:
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+ FAILED: ${{ steps.report.outputs.failed_count || '0' }}
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+ SCAN_OUTCOME: ${{ steps.scan.outcome }}
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+ run: |
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+ set -euo pipefail
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+ if [[ "$FAILED" != "0" ]]; then
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+ echo "::error::$FAILED entrie(s) fail policy. See the run summary for verdicts."
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+ exit 1
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+ fi
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+ # The action can also fail without a policy verdict (clone error,
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+ # API error, schema mismatch). With zero parsed failures and a
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+ # nonzero exit, that is an infra error — fail loudly so the revert
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+ # workflow does NOT misread it as "everything passed".
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+ if [[ "$SCAN_OUTCOME" == "failure" ]]; then
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+ echo "::error::Scan step failed without a parseable policy verdict (likely an infra error)."
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+ exit 1
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+ fi
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tobin