Security work has a lot of repeatable judgment in it: scan this diff, check this dependency tree, review the policy, verify retention rules, write down the audit trail.

That is exactly where agent skills help. They give the agent a narrow procedure instead of a vague order to “be secure.”

They do not replace a security team. They catch the stuff that slips when engineering teams are moving fast: hardcoded secrets, stale packages, missing consent flows, weak logging, unclear retention rules, and threat models that never got written.

What to Look For

Clear scope. A useful security skill says exactly what it checks. “Audit my app” is too broad. “Scan for OWASP Top 10 issues” or “review dependency CVEs and license conflicts” is the right level.

Safe defaults. Security automation should avoid exposing secrets, changing production systems, or applying fixes without review. Prefer skills that report findings and suggested remediations before taking action.

Framework coverage. Compliance work depends on the rule set. GDPR, SOC 2, HIPAA, PCI-DSS, ISO 27001, and WCAG all ask different questions. Pick skills that name the frameworks they understand.

Actionable output. A finding is only useful if a developer can fix it. Look for severity ratings, affected files, example fixes, evidence, and next steps.

Top Agent Skills for Security and Compliance

1. Security Auditor

Security Auditor is the broad first pass for application security. It scans codebases for exposed secrets, SQL injection, XSS, insecure dependencies, and OWASP Top 10 patterns, then returns a prioritized report.

This is the skill to run before opening a pull request or before a release branch is cut. It works best as a fast review layer: catch obvious bugs, rank the risk, and point the engineer to the exact file or pattern that needs attention.

Compatible with: Claude Code, Codex, Cursor Category: Security Install: gh skill install wshobson/agents/security-auditor

2. Dependency Auditor

Most production incidents do not come from exotic zero-days. They come from old packages, vulnerable transitive dependencies, and license problems nobody noticed. Dependency Auditor checks npm, pip, and cargo dependency trees for known CVEs, deprecated packages, license conflicts, and version drift.

Use it when a project has been quiet for a few months, before a public release, or whenever a package lock file changes. The output is severity-ranked, so developers can separate “patch this now” from “schedule this for cleanup.”

Compatible with: Claude Code, Codex, Cursor Category: Security Install: gh skill install alirezarezvani/claude-skills/dependency-auditor

3. Threat Modeler

Threat Modeler turns architecture notes, API designs, and data flow descriptions into a structured STRIDE threat model. It identifies attack vectors, likely impact, and mitigation options before implementation hardens around a bad assumption.

This is especially useful for new features that touch auth, payments, PII, admin tools, or third-party integrations. Run it early. A threat model written after the code ships is mostly archaeology.

Compatible with: Claude Code, Codex, Universal Category: Security Install: gh skill install sickn33/antigravity-awesome-skills/threat-modeler

4. HashiCorp Vault

Secrets handling is one place where agent workflows can go wrong quickly. HashiCorp Vault gives an agent a safer path for working with secrets, policies, and auth methods in Vault without pasting credentials into prompts or source files.

The skill is built for teams that already use Vault. It helps retrieve secrets at runtime, rotate keys, update policies, and review access patterns while keeping secret material out of the conversation. That separation matters.

Compatible with: Claude Code, Codex Category: Security Install: gh skill install hashicorp/agent-skills/vault

5. Compliance Checker

Compliance Checker reviews documents, code, and policies against GDPR, HIPAA, SOC 2, PCI-DSS, and ISO 27001. It returns a gap analysis with remediation steps instead of a generic pass or fail.

Use it when preparing vendor questionnaires, reviewing internal policies, or checking whether a new feature creates obligations the product team missed. It will not make you compliant by itself, but it gives the team a clean punch list.

Compatible with: Claude Code, Universal Category: Compliance Install: gh skill install sickn33/antigravity-awesome-skills/compliance-checker

6. GDPR Compliance Auditor

For products handling EU user data, GDPR Compliance Auditor goes deeper on one framework. It reviews data collection points, consent mechanisms, retention policies, PII handling, and third-party processor flows.

This is the right choice when the question is not “are we generally secure?” but “can we explain what personal data we collect, why we collect it, and how a user can exercise their rights?” That question needs a dedicated pass.

Compatible with: Claude Code, Cursor, Universal Category: Compliance Install: gh skill install wshobson/agents/gdpr-compliance

7. Audit Trail Designer

Logs are easy to add and hard to design well. Audit Trail Designer specifies what to log, how to structure the schema, how to make events tamper-evident, how long to retain them, and how investigators should query them later.

This skill is a strong fit for finance, healthcare, admin panels, permission changes, and any product where “who did what, when?” is a real operational question. It helps teams design auditability before the first incident.

Compatible with: Claude Code, Codex Category: Compliance Install: gh skill install ComposioHQ/awesome-claude-skills/audit-trail-designer

How to Choose

Start with the failure mode you are most likely to miss. If code-level bugs are the risk, run Security Auditor and Dependency Auditor first. If the product is still being designed, Threat Modeler belongs at the start of the workflow.

For regulated products, pair Compliance Checker with a framework-specific skill like GDPR Compliance Auditor. Compliance Checker gives breadth. GDPR Compliance Auditor gives depth for personal data handling.

If your team already uses Vault, install the HashiCorp Vault skill before letting agents touch secret-dependent workflows. If you are building admin or regulated workflows, Audit Trail Designer should run before the database schema is final.

The practical stack for most teams is simple: Security Auditor for code, Dependency Auditor for packages, Threat Modeler for new features, and Compliance Checker for policy review. Add the specialized skills when your risk profile demands them.

FAQ

Q: Can agent skills replace a penetration test or compliance audit? A: No. They are review aids, not legal sign-off or a substitute for expert testing. They help teams find issues earlier so formal review starts from a better baseline.

Q: Should these skills run in CI? A: Some can. Dependency Auditor and Security Auditor are natural CI checks because they produce repeatable findings. Threat Modeler and Compliance Checker are better as review steps when architecture or policy changes.

Q: What is the safest way to use security skills with real secrets? A: Do not paste secrets into prompts. Use a secrets manager such as Vault and keep the agent scoped to retrieval, rotation, policy review, or generated commands that a human approves before execution.