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Find bugs

Skill aiskillstore/marketplace/skills/getsentry/find-bugs

Find bugs, security vulnerabilities, and code quality issues in local branch changes. Use when asked to review changes, find bugs, security review, or audit code on the current branch.From its SKILL.md

Install
npx -y skills add aiskillstore/marketplace --skill find-bugs

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

  • no licenseNo license file was found in the repository. Code published without one is not open source by default, so using it at work is a question for whoever answers licensing questions where you are.

SKILL.md

2.7 KB, 570 tokens by cl100k_base, as published. Nobody here has run it

Find Bugs

Review changes on this branch for bugs, security vulnerabilities, and code quality issues.

Phase 1: Complete Input Gathering

  1. Get the FULL diff: git diff master...HEAD
  2. If output is truncated, read each changed file individually until you have seen every changed line
  3. List all files modified in this branch before proceeding

Phase 2: Attack Surface Mapping

For each changed file, identify and list:

  • All user inputs (request params, headers, body, URL components)
  • All database queries
  • All authentication/authorization checks
  • All session/state operations
  • All external calls
  • All cryptographic operations

Phase 3: Security Checklist (check EVERY item for EVERY file)

  • Injection: SQL, command, template, header injection
  • XSS: All outputs in templates properly escaped?
  • Authentication: Auth checks on all protected operations?
  • Authorization/IDOR: Access control verified, not just auth?
  • CSRF: State-changing operations protected?
  • Race conditions: TOCTOU in any read-then-write patterns?
  • Session: Fixation, expiration, secure flags?
  • Cryptography: Secure random, proper algorithms, no secrets in logs?
  • Information disclosure: Error messages, logs, timing attacks?
  • DoS: Unbounded operations, missing rate limits, resource exhaustion?
  • Business logic: Edge cases, state machine violations, numeric overflow?

Phase 4: Verification

For each potential issue:

  • Check if it's already handled elsewhere in the changed code
  • Search for existing tests covering the scenario
  • Read surrounding context to verify the issue is real

Phase 5: Pre-Conclusion Audit

Before finalizing, you MUST:

  1. List every file you reviewed and confirm you read it completely
  2. List every checklist item and note whether you found issues or confirmed it's clean
  3. List any areas you could NOT fully verify and why
  4. Only then provide your final findings

Output Format

Prioritize: security vulnerabilities > bugs > code quality

Skip: stylistic/formatting issues

For each issue:

  • File:Line - Brief description
  • Severity: Critical/High/Medium/Low
  • Problem: What's wrong
  • Evidence: Why this is real (not already fixed, no existing test, etc.)
  • Fix: Concrete suggestion
  • References: OWASP, RFCs, or other standards if applicable

If you find nothing significant, say so - don't invent issues.

Do not make changes - just report findings. I'll decide what to address.

What ships with it: 1 file

8.5 KB alongside SKILL.md

Keep looking

Skills are one crate of 325,949. Ordering is by how many stacks a row turns up in, so the top of any crate is what has actually been picked rather than what has the most stars.