justasmonkev/agent-maintenance-skills/security-scan-sharded

Sharded Security Scan

Fan out the scan, then kill false positives before they reach the report.

1) Shard the repo

• Split by attack surface, not by directory size: input parsing, auth/session, file/path handling, child processes & shell, network/HTTP, deps & supply chain, secrets/config.
• One agent per shard. Each agent returns findings as {file, line, severity, claim, exploit-scenario} — a finding without a concrete exploit scenario is not a finding.

2) Validate every finding

• For each finding, spawn a skeptic agent whose only job is to REFUTE it: read the actual code path, check if input is already sanitized upstream, check reachability.
• Default to refuted when uncertain. Only CONFIRMED findings survive.

3) Supply chain pass

• npm audit / lockfile diff for known CVEs; flag install scripts (preinstall/postinstall) in deps; flag deps with curl | sh patterns or network access at install time.

4) Report

• Rank by severity, one line per finding: severity — file:line — exploit scenario — suggested fix.
• List explicitly what was scanned and what was skipped (no silent coverage gaps).

Notes:

• Fixes are a separate step — never mix fixing into the scan run.
• Re-runs after fixes: re-validate only the previously CONFIRMED findings.