refactor

refactor is a skill for Claude Code, Codex from poshan0126/dotclaude. It costs 31 tokens per session (574 once invoked), scanned A, original, MIT.

A step-by-step method for changing code without changing what it does. It uses tests as a safety net and checks the code after each small transformation.

In plain words
What is it for?
Use it to improve names, remove duplication, reorganize code or simplify the current working diff.
Why use it?
It makes structural cleanup easier to review and helps detect behavior changes or broken tests early. With --diff, it focuses on the current uncommitted changes.

Skill for Claude CodeCodex

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 skills/poshan0126/dotclaude/refactor
Any agent
npx skills add poshan0126/dotclaude --skill refactor
Clone the repo
git clone --depth 1 https://github.com/poshan0126/dotclaude

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 refactor

README.md
[![agentmods](https://agentmods.dev/badge/skills/poshan0126/dotclaude/refactor.svg)](https://agentmods.dev/skills/poshan0126/dotclaude/refactor)
Your own site
<a href="https://agentmods.dev/skills/poshan0126/dotclaude/refactor"><img src="https://agentmods.dev/badge/skills/poshan0126/dotclaude/refactor.svg" alt="Measured on agentmods" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 574 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00031 $0.00574
Opus 5 $0.00015 $0.00287
Sonnet 5 $0.00006 $0.00115
Haiku 4.5 $0.00003 $0.00057

Measured 4d ago against content hash 6a65cd9c80b1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

refactor 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.

skills/refactor/SKILL.md · 50 lines

How it starts

The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Refactor $ARGUMENTS safely. If $ARGUMENTS contains --diff, use Diff mode below instead.

Process

1. Understand the current state

  • Read the code and its tests
  • Identify what the code does, its callers, and its dependencies
  • If there are no tests, WRITE TESTS FIRST. You need a safety net before changing anything

2. Plan the refactoring

  • State what you're changing and why (clearer naming, reduced duplication, better structure)
  • List the specific transformations (extract function, inline variable, move module, etc.)
  • Check: does this change any external behavior? If yes, this isn't a refactor. Reconsider.

3. Make changes in small, testable steps

  • One transformation at a time
  • Run tests after EACH step. Not at the end
  • If a test breaks, undo the last step and make a smaller change

4. Verify

  • All existing tests pass
  • Lint and typecheck pass
  • The public API hasn't changed (unless that was the explicit goal)
  • The code is objectively simpler. Fewer lines, fewer branches, clearer names

Diff mode (--diff): simplify what you just wrote

The pre-commit polish pass. Target = the current working diff (git diff + git diff --cached; if clean, the last commit). Goal: make the diff smaller and clearer with identical behavior.

  1. Read the diff. For each hunk ask: would a reviewer write this more simply?
    • Inline abstractions used once that the diff itself introduced
    • Remove dead parameters, unused returns, speculative generality ("might need it later")
    • Delete comments that restate the code, and defensive checks duplicating guarantees the codebase already makes
    • Align naming with the surrounding file's conventions
  2. Touch ONLY lines in the diff (plus mechanical consequences like an import). Never expand into surrounding code — that's regular refactor mode.
  3. Show the proposed simplifications, confirm, apply in small steps, run the tests for the touched files after each.
  4. Report: lines before → after. If nothing to simplify, say "diff is already minimal" and stop — don't invent work.

Read the full file on GitHub · 50 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 First seen · 50 lines · 31 tokens per session scan A 6a65cd9c80b1

Subscribe to this mod's changes

refactor is a skill published in the GitHub repository poshan0126/dotclaude (860 stars, last pushed 7d ago), licensed MIT. It adds 31 tokens to every session and 574 once invoked, about $0.0002 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 2026-08-30.

Related

Other skills, from other repositories

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

brainstorming

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

obra/superpowers · 37 tokens

auto-perf-optimize

Run agent-driven VS Code performance or memory investigations. Use when asked to launch Code OSS, automate a VS Code scenario, run the Chat memory smoke runner, capture renderer heap snapshots, take workflow screenshots, compare run summaries, or drive a repeatable scenario before heap-snapshot analysis.

microsoft/vscode · 62 tokens

chat-perf

Run chat perf benchmarks and memory leak checks against the local dev build or any published VS Code version. Use when investigating chat rendering regressions, validating perf-sensitive changes to chat UI, or checking for memory leaks in the chat response pipeline.

microsoft/vscode · 51 tokens

chat-pet-sprite-creation

Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.

microsoft/vscode · 53 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens