refactor

A workflow for restructuring existing code while keeping its behavior unchanged; refactoring means improving the code's internal organization without changing what it does.

In plain words
What is it for?
It is for extracting code into modules, renaming code across a project, and restructuring code that is not part of the current changes.
Why use it?
It provides a defined process for breaking up modules, renaming code across files, and reducing technical debt.

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

Made for: Claude Code, Codex.

Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 887 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 $0.00056 $0.00887
Opus 5 $0.00028 $0.00443
Sonnet 5 $0.00011 $0.00177
Haiku 4.5 $0.00006 $0.00089

Measured 2d ago against content hash 0adc29bc60a6, 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.

skills/refactor/SKILL.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Refactoring Workflow

Standalone Codex

Skip the Claude marker below. Create each new agent with spawn_agent, deliver context to a running agent with send_message, trigger another turn for an idle existing agent with followup_task, wait with wait_agent, and stop a current turn with interrupt_agent only when necessary. Never spawn codex-verifier and never run codex-run.ts from inside Codex.

Writers share the working tree unless the live host explicitly offers isolation. Assign non-overlapping ownership and serialize planner handoff, implementer, and test-writer phases; only read-only reviewers may overlap. Codex implementers are not promised Claude worktree isolation.

Claude-only marker: standalone Codex must skip this command. mkdir -p ~/.claude/tmp && echo "refactor" > ~/.claude/tmp/heavy-skill-active && date -u +"%Y-%m-%dT%H:%M:%SZ" >> ~/.claude/tmp/heavy-skill-active

You are in Maestro orchestration mode. Delegate immediately.

Workflow

  1. Explore - Spawn explore agent to analyze current code
  2. Plan - Spawn planner agent to design refactoring approach
  3. Implement - Spawn implementer agent to refactor
  4. Test - Spawn tester agent to verify behavior unchanged
  5. Review - Spawn reviewer agent to check quality
  6. Learn - Store patterns discovered during refactoring

Agent Delegation

Spawn explore and planner first — they accept thin prompts because they discover what they need from the codebase:

Agent(explore, "Analyze the code to refactor: $ARGUMENTS. Identify patterns, issues, dependencies.")
Agent(planner, "Design refactoring approach based on analysis. Keep behavior unchanged.")

Claude: then assemble the implementer prompt from the actual planner output. The Claude implementer runs in an isolated worktree with no access to prior agent results, so paste the real plan — not "according to plan":

  • The user's refactor target ($ARGUMENTS) verbatim
  • The planner's step-by-step plan, including file paths and each move/rename/extract operation
  • Any "preserve behavior" invariants the planner called out
  • The test command that must remain green
  • Scope: "only the files in the plan; do not touch anything else"

Read the full file on GitHub · 86 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. 2d ago First seen · 86 lines · 56 tokens per session scan A 0adc29bc60a6

Subscribe to this mod's changes

refactor is a skill published in the GitHub repository darkroomengineering/cc-settings (42 stars, last pushed 4d ago), licensed MIT. It adds 56 tokens to every session and 887 once invoked, about $0.0003 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.

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