security

A command that reviews code for common security weaknesses using OWASP guidance. OWASP is a widely used set of recommendations for protecting software.

In plain words
What is it for?
Use it to inspect application code for issues such as injection, cross-site scripting, exposed sensitive data, insecure deserialization, and security misconfiguration.
Why use it?
It provides a checklist for finding risks that are easy to miss during normal code review, including unsafe input handling, weak authentication, and incorrect access controls.

Command for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/fmflurry/settings-opencode/security
Clone the repo
git clone --depth 1 https://github.com/fmflurry/settings-opencode

Made for: Claude Code.

Per session 4 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 452 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 95% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00004 $0.00452
Opus 5 $0.00002 $0.00226
Sonnet 5 $0.00001 $0.00090
Haiku 4.5 $0.00000 $0.00045

Measured 2d ago against content hash dcc2fb22703a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

security scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

95% identical to security — 1 line differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/commands/security.md · 89 lines

What it actually says

Security Review Command

Conduct a comprehensive security review: $ARGUMENTS

Your Task

Analyze the specified code for security vulnerabilities following OWASP guidelines and security best practices.

Security Checklist

OWASP Top 10

  1. Injection (SQL, NoSQL, OS command, LDAP)

    • Check for parameterized queries
    • Verify input sanitization
    • Review dynamic query construction
  2. Broken Authentication

    • Password storage (bcrypt, argon2)
    • Session management
    • Multi-factor authentication
    • Password reset flows
  3. Sensitive Data Exposure

    • Encryption at rest and in transit
    • Proper key management
    • PII handling
  4. XML External Entities (XXE)

    • Disable DTD processing
    • Input validation for XML
  5. Broken Access Control

    • Authorization checks on every endpoint
    • Role-based access control
    • Resource ownership validation
  6. Security Misconfiguration

    • Default credentials removed
    • Error handling doesn't leak info
    • Security headers configured
  7. Cross-Site Scripting (XSS)

    • Output encoding
    • Content Security Policy
    • Input sanitization
  8. Insecure Deserialization

    • Validate serialized data
    • Implement integrity checks
  9. Using Components with Known Vulnerabilities

    • Run npm audit
    • Check for outdated dependencies
  10. Insufficient Logging & Monitoring

    • Security events logged
    • No sensitive data in logs
    • Alerting configured

Additional Checks

  • Secrets in code (API keys, passwords)
  • Environment variable handling
  • CORS configuration
  • Rate limiting
  • CSRF protection
  • Secure cookie flags

Report Format

Critical Issues

[Issues that must be fixed immediately]

High Priority

[Issues that should be fixed before release]

Recommendations

[Security improvements to consider]


IMPORTANT: Security issues are blockers. Do not proceed until critical issues are resolved.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 89 lines · 4 tokens per session scan A dcc2fb22703a

Subscribe to this mod's changes

security is a command published in the GitHub repository fmflurry/settings-opencode (172 stars, last pushed 20d ago), licensed MIT. It adds 4 tokens to every session and 452 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to security, differing in 1 line, and is treated as a copy.