bug-fix

bug-fix is a skill for Claude Code from bobmatnyc/claude-mpm-skills. It costs 18 tokens per session (3,073 once invoked), scanned A, original, MIT.

A structured workflow for confirming that a software bug is fixed and does not return later.

In plain words
What is it for?
It helps document reproduction steps, investigate the cause, verify the fix, add regression tests, and explain the result.
Why use it?
It requires reproducing the problem first and recording evidence, which helps avoid fixing only the visible symptom or missing edge cases.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

not rated 75repo +1 1mo ago A scan Socket: passSnyk: passSkillSpector: pass 18 tokens original MIT

Good fit It helps document reproduction steps, investigate the cause, verify the fix, add regression tests, and explain the result.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bobmatnyc/claude-mpm-skills/bug-fix
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 bobmatnyc/claude-mpm-skills --skill bug-fix
Clone the repo
git clone --depth 1 https://github.com/bobmatnyc/claude-mpm-skills

Made for: Claude Code.

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 bug-fix

README.md
[![agentmods](https://agentmods.dev/badge/skills/bobmatnyc/claude-mpm-skills/bug-fix/github.svg)](https://agentmods.dev/skills/bobmatnyc/claude-mpm-skills/bug-fix)
Your own site
<a href="https://agentmods.dev/skills/bobmatnyc/claude-mpm-skills/bug-fix"><img src="https://agentmods.dev/badge/skills/bobmatnyc/claude-mpm-skills/bug-fix/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for bug-fix

Your own site · 80×15
<a href="https://agentmods.dev/skills/bobmatnyc/claude-mpm-skills/bug-fix"><img src="https://agentmods.dev/badge/skills/bobmatnyc/claude-mpm-skills/bug-fix.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,073 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. Third-party audits
  • Socket pass 22 Apr 2026
  • Snyk pass 22 Apr 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found 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 $0.00018 $0.03073
Opus 5 $0.00009 $0.01537
Sonnet 5 $0.00004 $0.00615
Haiku 4.5 $0.00002 $0.00307

Measured 9d ago against content hash 591fbc4cea50, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

bug-fix 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 9d 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.

universal/verification/bug-fix/SKILL.md · 464 lines

How it starts

The opening of the file, as written. The whole thing — 464 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bug Fix Verification

Systematic workflow for verifying bug fixes to ensure quality and prevent regressions.

When to Use This Skill

Use this skill when:

  • Fixing a reported bug
  • Creating PR for bug fix
  • Need to document bug fix verification
  • Want to ensure fix doesn't introduce regressions
  • Need structured approach to bug resolution

Why Bug Fix Verification Matters

Problems It Solves

  • ❌ Fixing symptoms instead of root cause
  • ❌ Introducing new bugs while fixing old ones
  • ❌ Incomplete testing of edge cases
  • ❌ No proof that bug is actually fixed
  • ❌ Poor documentation of fix reasoning

Benefits

  • ✅ Confirms bug is truly fixed (not masked)
  • ✅ Documents root cause analysis
  • ✅ Prevents regression with tests
  • ✅ Provides clear evidence for stakeholders
  • ✅ Improves team knowledge of codebase

Bug Fix Workflow

Step 1: Reproduce Before Fix

Critical: Never fix a bug without first reproducing it.

Reproduction Checklist
  • Document exact steps to reproduce
  • Capture error message/behavior with screenshots
  • Note frequency (100% reproducible, intermittent, etc.)
  • Video recording if UI-related or complex interaction
  • Identify affected versions/environments
  • Note any workarounds users have found
  • Verify bug exists in clean environment (not just local)
Reproduction Documentation Template
## Bug Reproduction

### Steps to Reproduce
1. Navigate to `/dashboard`
2. Click "Export Data" button
3. Select date range: Jan 1 - Dec 31
4. Click "Generate Report"

### Expected Behavior
- Report downloads as CSV file
- File contains all transactions for date range
- Download completes in < 5 seconds

### Actual Behavior
- Error appears: "Failed to generate report"
- Console error: `TypeError: Cannot read property 'map' of undefined`
- No file downloads
- Issue occurs 100% of the time

### Environment
- Browser: Chrome 120.0.6099.109
- OS: macOS 14.2
- User Role: Admin
- Data Size: ~10,000 transactions

### Screenshots
![Error message](screenshots/export-error.png)
![Console error](screenshots/console-error.png)

Read the full file on GitHub · 464 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 464 lines · 18 tokens per session scan A 591fbc4cea50

Subscribe to this mod's changes

bug-fix is a skill published in the GitHub repository bobmatnyc/claude-mpm-skills (75 stars, last pushed 1mo ago), licensed MIT. It adds 18 tokens to every session and 3,073 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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