refactor

A guided code-refactoring process that requires behavior to stay the same while the code becomes clearer or simpler.

In plain words
What is it for?
Use it to plan refactors, assess their impact, show code changes, check functional equivalence, and review the result against safety rules.
Why use it?
It reduces the risk that cleanup changes break features, public interfaces, tests, or error handling.

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/aquifer-sea/pattern8/refactor
Any agent
npx skills add Aquifer-sea/pattern8 --skill refactor
Clone the repo
git clone --depth 1 https://github.com/Aquifer-sea/pattern8

Made for: Claude Code, Codex.

Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 340 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 $0.00024 $0.00340
Opus 5 $0.00012 $0.00170
Sonnet 5 $0.00005 $0.00068
Haiku 4.5 $0.00002 $0.00034

Measured 2d ago against content hash f466a2b4ad6c, 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 · 45 lines

What it actually says

Code Refactor

Constrains the Agent to perform safe code refactoring: guarantee functional equivalence while improving code quality.

Step 1: Inversion (Requirements Alignment)

Before refactoring, you must check every item in assets/checklist.yaml.

Step 2: Generator (Generate Refactoring Plan from Template)

Your output must strictly follow the format in assets/template.yaml. Must include: refactoring goal, impact analysis, refactoring steps (with diff), behavioral equivalence checklist.

Step 3: Tool Wrapper (Security Fence)

If you need to execute code during refactoring for verification, check references/security.yaml first. Do not delete tests or remove error handling logic during refactoring.

Step 4: Reviewer (Self-Audit Loop)

Audit your refactoring output against references/guidelines.yaml. Key checks: is the behavior equivalent? Are public APIs unchanged? Is code complexity reduced? Roll back and regenerate if non-compliant, up to 3 retries.

Files

What ships with it

4 files 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. 2d ago First seen · 45 lines · 24 tokens per session scan A f466a2b4ad6c

Subscribe to this mod's changes

refactor is a skill published in the GitHub repository Aquifer-sea/pattern8 (49 stars, last pushed 5mo ago), licensed MIT. It adds 24 tokens to every session and 340 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 2026-08-30.

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