C1 (V17) action-gate.sh: gates the ACTION, not just the tool name. Outcome model
ALLOW/WARN/REQUIRE_APPROVAL/BLOCK. BLOCK on sensitive-file writes (.env, *.pem,
id_rsa, .github/workflows, .ssh, .aws/credentials, .npmrc) and destructive/
remote-exec commands (rm -rf /, curl|bash, chmod 777, git push --force);
REQUIRE_APPROVAL on dependency installs and non-local network egress (clears
only with an audited CASAN_ACTION_APPROVER). Decisions logged to action-gate.jsonl.
C2 (V18) supply-chain-gate.sh + supply-chain-scan.py: diffs package.json /
requirements.txt / pom.xml / build.gradle against a baseline (explicit or git
HEAD). BLOCK on denylisted/known-malicious packages, typosquats (edit-distance 1
to a known package), and dangerous lifecycle scripts (pre/post/install);
REQUIRE_APPROVAL on any new dependency. Emits a dep-diff report and records
which live scanners (npm audit / pip-audit / osv-scanner) are available.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
