safe-refactoring

safe-refactoring is a skill for Claude Code from UnpaidAttention/fable5-methodology. It costs 130 tokens per session (1,232 once invoked), scanned A, original, no licence file.

A method for reorganising code while keeping its behaviour the same. It starts with tests, makes small mechanical changes, and checks the result after each change.

In plain words
What is it for?
Use it when refactoring, simplifying, cleaning up, or rearranging code, particularly when changes span several functions or files.
Why use it?
It lowers the risk of breaking working code during cleanup or restructuring.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the fable5-methodology plugin — 26 skills, 4 agents, 5 hooks shipped together

Good fit Use it when refactoring, simplifying, cleaning up, or rearranging code, particularly when changes span several functions or files.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/unpaidattention/fable5-methodology/safe-refactoring
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.

Any agent
npx skills add UnpaidAttention/fable5-methodology --skill safe-refactoring
Clone the repo
git clone --depth 1 https://github.com/UnpaidAttention/fable5-methodology

Made for: Claude Code.

Or install fable5-methodology, the plugin that ships this one along with the rest of its 26 skills, 4 agents, 5 hooks.

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 safe-refactoring

README.md
[![agentmods](https://agentmods.dev/badge/skills/unpaidattention/fable5-methodology/safe-refactoring/github.svg)](https://agentmods.dev/skills/unpaidattention/fable5-methodology/safe-refactoring)
Your own site
<a href="https://agentmods.dev/skills/unpaidattention/fable5-methodology/safe-refactoring"><img src="https://agentmods.dev/badge/skills/unpaidattention/fable5-methodology/safe-refactoring/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for safe-refactoring

Your own site · 80×15
<a href="https://agentmods.dev/skills/unpaidattention/fable5-methodology/safe-refactoring"><img src="https://agentmods.dev/badge/skills/unpaidattention/fable5-methodology/safe-refactoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 130 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,232 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00130 $0.01232
Opus 5 $0.00065 $0.00616
Sonnet 5 $0.00026 $0.00246
Haiku 4.5 $0.00013 $0.00123

Measured 9d ago against content hash 02e563e98472, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

safe-refactoring 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 9d 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/safe-refactoring/SKILL.md · 91 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 9d ago First seen · 91 lines · 130 tokens per session scan A 02e563e98472

Subscribe to this mod's changes

safe-refactoring is a skill published in the GitHub repository UnpaidAttention/fable5-methodology (91 stars, last pushed 2mo ago), with no licence file. It adds 130 tokens to every session and 1,232 once invoked, about $0.0006 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