llms: Skill for Claude Code

.claude/skills/fix/SKILL.md

fix is a skill for Claude Code from matteocervelli/llms. It costs 33 tokens per session (1,295 once invoked), scanned A, original, MIT.

A focused workflow for fixing software bugs and technical debt, with an optional GitHub issue and optional pull request. Technical debt is code that makes future changes harder or riskier.

In plain words
What is it for?
Use it for bugs or technical debt when you want a minimal workflow that can also include a GitHub issue or pull request.
Why use it?
It provides a small, defined process for investigating a problem, making a fix, checking for regressions, and committing the result.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: names the ExitPlanMode tool.

This is matteocervelli/llms's own configuration. It tells Claude Code how to work on llms itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything llms configures →

Reuse

Borrowing it

Nothing to install: this file belongs to matteocervelli/llms. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/matteocervelli/llms/main/.claude/skills/fix/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/matteocervelli/llms

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 fix

README.md
[![agentmods](https://agentmods.dev/badge/skills/matteocervelli/llms/fix.svg)](https://agentmods.dev/skills/matteocervelli/llms/fix)
Your own site
<a href="https://agentmods.dev/skills/matteocervelli/llms/fix"><img src="https://agentmods.dev/badge/skills/matteocervelli/llms/fix.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,295 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00033 $0.01295
Opus 5 $0.00016 $0.00647
Sonnet 5 $0.00007 $0.00259
Haiku 4.5 $0.00003 $0.00129

Measured 3d ago against content hash 28665f607ad2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

fix scanned grade A with 1 finding 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 3d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **REST endpoint** → `curl` commands covering happy path + error path
.claude/skills/fix/SKILL.md · 199 lines

How it starts

The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fix Skill

Purpose

Minimal-ceremony fix workflow for bugs and technical debt. GitHub issue is optional — provide one for traceability, or describe the problem free-form.

Replaces /issue-fix. Key differences from the old skill:

  • Issue number not required
  • No automatic PR (opt-in with --pr)
  • Cleaner ceremony: branch → fix → security scan → regression test → commit

When to Use vs Other Skills

/quick /fix /implementation
Ceremony None Minimal Full
Size Tiny (minutes) Small-medium Medium-large
Type Anything Bug / tech debt Feature / refactor
Issue Optional Optional Optional
PR No Optional (--pr) Yes
Tests No Regression only Full TDD

Usage

/fix "broken login after password change"
/fix --issue 42 "auth regression on mobile"
/fix --pr "memory leak in worker queue"        # create PR after commit
/fix --issue 15 --pr "null pointer in parser"  # issue + PR

Workflow

1. Analysis

If issue provided:

gh issue view <N>

Complexity check — pick one path:

Simple fix (root cause obvious from description, ≤2 files, no security implications): → Reason through root cause directly, proceed to Step 2.

Complex fix (scope unclear, multiple files, security implications, or ambiguous cause): → Automatically enter Plan Mode:

  1. Call EnterPlanMode
  2. Spawn a Plan agent (model: sonnet) with all gathered context to produce:
    • Root cause analysis
    • Minimal change plan (files + rationale)
    • Regression test strategy
    • Security implications (if any)
  3. Call ExitPlanMode — present plan to user, wait for approval
  4. After approval, proceed to Step 2

Root cause still unclear after analysis? Stop and run /diagnose "<symptom description>" first. Return here once the investigation identifies the root cause.

Read the full file on GitHub · 199 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. 3d ago First seen · 199 lines · 33 tokens per session scan A 28665f607ad2

Subscribe to this mod's changes

fix is a skill published in the GitHub repository matteocervelli/llms (25 stars, last pushed 3mo ago), licensed MIT. It adds 33 tokens to every session and 1,295 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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