find-bugs

find-bugs is a skill for Claude Code, Codex from klh/speedy-claude. It costs 40 tokens per session (646 once invoked), scanned A, a copy of find-bugs, MIT.

A review of changes on the current code branch to find bugs, security weaknesses, and code-quality problems. It checks areas such as user input, database queries, access control, external calls, and session handling.

In plain words
What is it for?
Use it before merging branch changes, during security reviews, or when auditing code for functional and security problems.
Why use it?
It gives a structured way to examine the full change set instead of relying on a quick reading of selected files. It can reveal issues such as injection, cross-site scripting, missing permissions, or race conditions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it before merging branch changes, during security reviews, or when auditing code for functional and security problems.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/klh/speedy-claude/find-bugs
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.

Any agent
npx skills add klh/speedy-claude --skill find-bugs
Clone the repo
git clone --depth 1 https://github.com/klh/speedy-claude

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for find-bugs

README.md
[![agentmods](https://agentmods.dev/badge/skills/klh/speedy-claude/find-bugs.svg)](https://agentmods.dev/skills/klh/speedy-claude/find-bugs)
Your own site
<a href="https://agentmods.dev/skills/klh/speedy-claude/find-bugs"><img src="https://agentmods.dev/badge/skills/klh/speedy-claude/find-bugs.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 646 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 94% 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 5.1 $0.00040 $0.00646
Opus 5 $0.00020 $0.00323
Sonnet 5 $0.00008 $0.00129
Haiku 4.5 $0.00004 $0.00065

Measured 4d ago against content hash 6d9a19f2c204, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

find-bugs 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 4d 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

94% identical to find-bugs — 54 lines 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.

skills-available/find-bugs/SKILL.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

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 $(gh repo view --json defaultBranchRef --jq '.defaultBranchRef.name')...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

Read the full file on GitHub · 76 lines

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. 4d ago Changed · +1 lines 6d9a19f2c204
  2. 8d ago First seen · 75 lines · 40 tokens per session scan A a2f76bfc32b3

Subscribe to this mod's changes

find-bugs is a skill published in the GitHub repository klh/speedy-claude (11 stars, last pushed 2d ago), licensed MIT. It adds 40 tokens to every session and 646 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to find-bugs, differing in 54 lines, and is treated as a copy.