refactor

A code-restructuring workflow that improves how existing code is organized while keeping its behavior unchanged.

In plain words
What is it for?
Use it to rename unclear elements, simplify conditions, extract functions or variables, reduce nesting, split large files, improve types, and remove duplication.
Why use it?
It reduces duplication, complicated logic, and hard-to-maintain structure while using tests to detect accidental behavior 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/huzaifa525/claude-code-optimizer/refactor
Any agent
npx skills add huzaifa525/claude-code-optimizer --skill refactor
Clone the repo
git clone --depth 1 https://github.com/huzaifa525/claude-code-optimizer

Made for: Claude Code, Codex.

Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 394 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 $0.00026 $0.00394
Opus 5 $0.00013 $0.00197
Sonnet 5 $0.00005 $0.00079
Haiku 4.5 $0.00003 $0.00039

Measured 2d ago against content hash 3c2e41b68e17, 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 2d 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.

templates/.claude/skills/refactor/SKILL.md · 67 lines

What it actually says

Refactor: $ARGUMENTS

Rules

  • NEVER change behavior — only improve structure
  • ALWAYS run tests before AND after
  • Make small, incremental changes
  • Each change should be independently verifiable

Steps

  1. Run tests first — establish baseline

    [test command]
    

    If tests fail BEFORE refactoring, STOP and tell the user.

  2. Read the code to refactor and understand it fully

  3. Read the tests for this code — understand what behavior is expected

  4. Identify refactoring opportunities:

    • Extract method (function too long)
    • Extract variable (complex expression)
    • Rename for clarity
    • Remove duplication (DRY)
    • Simplify conditionals
    • Replace magic numbers with constants
    • Reduce nesting depth
    • Split large files
    • Improve type safety
  5. Apply changes incrementally

    • One refactoring at a time
    • Run tests after each change
    • If tests fail, revert immediately
  6. Run full test suite

    [test command]
    
  7. Report

    ## Refactoring Summary
    
    ### Changes
    - [what was refactored and why]
    
    ### Before → After
    - [specific improvements]
    
    ### Tests
    - All [X] tests passing
    - No behavior changes
    
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. 2d ago First seen · 67 lines · 26 tokens per session scan A 3c2e41b68e17

Subscribe to this mod's changes

refactor is a skill published in the GitHub repository huzaifa525/claude-code-optimizer (9 stars, last pushed 5mo ago), licensed MIT. It adds 26 tokens to every session and 394 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 2026-08-31.