modernize-harden

Run a security hardening pass on legacy/$1: find vulnerabilities, rank them, and produce a reviewable patch for the critical ones.

This command never edits legacy/ — it writes findings and a proposed patch to analysis/$1/. The user reviews and applies (or not).

Scan

Spawn the security-auditor subagent:

"Adversarially audit legacy/$1 for security vulnerabilities. Cover what's relevant to the stack: injection (SQL/NoSQL/OS command/template), broken auth, sensitive data exposure, access control gaps, insecure deserialization, hardcoded secrets, vulnerable dependency versions, missing input validation, path traversal. For each finding return: CWE ID, severity (Critical/High/Med/Low), file:line, one-sentence exploit scenario, and recommended fix. Run any available SAST tooling (npm audit, pip-audit, OWASP dependency-check) and include its raw output."

Triage

Write analysis/$1/SECURITY_FINDINGS.md:

• Summary scorecard (count by severity, top CWE categories)
• Findings table sorted by severity
• Dependency CVE table (package, installed version, CVE, fixed version)

Remediate

For each Critical and High finding, draft a minimal, targeted fix. Do not edit legacy/ — write all fixes as a single unified diff to analysis/$1/security_remediation.patch, with a comment line above each hunk citing the finding ID it addresses (# SEC-001: parameterize the query).

Add a Remediation Log section to SECURITY_FINDINGS.md mapping each finding ID → one-line summary of the proposed fix and the patch hunk that implements it.

Verify

Spawn the security-auditor again to review the patch against the original code:

"Review analysis/$1/security_remediation.patch against legacy/$1. For each hunk: does it fully remediate the cited finding? Does it introduce new vulnerabilities or change behavior beyond the fix? Return one verdict per hunk: RESOLVES / PARTIAL / INTRODUCES-RISK, with a one-line reason."

Add a Patch Review section to SECURITY_FINDINGS.md with the verdicts. If any hunk is PARTIAL or INTRODUCES-RISK, revise the patch and re-review.

Present

Tell the user the artifacts are ready:

• analysis/$1/SECURITY_FINDINGS.md — findings, remediation log, patch review
• analysis/$1/security_remediation.patch — review, then apply if appropriate with git -C legacy/$1 apply ../../analysis/$1/security_remediation.patch
• Re-run /modernize-harden $1 after applying to confirm resolution

Suggest: glow -p analysis/$1/SECURITY_FINDINGS.md