What is oma-refactor?

A refactoring specialist that reorganizes code while keeping its observable behavior unchanged, using tests and other checks as safety gates.

Use it to remove code smells and technical debt, split large files or methods, move or rename code, add characterization tests, and prioritize refactoring hotspots.

It makes legacy or difficult code easier to maintain while reducing the risk that cleanup will accidentally alter how the software works.

oma-refactor — Skill for Claude Code and Codex by first-fluke

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 first-fluke/fullstack-starter --skill oma-refactor

Clone the repo

git clone --depth 1 https://github.com/first-fluke/fullstack-starter

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/first-fluke/fullstack-starter/oma-refactor/github.svg)](https://agentmods.dev/skills/first-fluke/fullstack-starter/oma-refactor)

Your own site

<a href="https://agentmods.dev/skills/first-fluke/fullstack-starter/oma-refactor"><img src="https://agentmods.dev/badge/skills/first-fluke/fullstack-starter/oma-refactor/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/first-fluke/fullstack-starter/oma-refactor"><img src="https://agentmods.dev/badge/skills/first-fluke/fullstack-starter/oma-refactor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,752 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 100% copy Near-identical to another mod 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.

Model	Per session	Once invoked
Fable 5.1	$0.00025	$0.02752
Opus 5.5	$0.00010	$0.01101
Sonnet 5.5	$0.00005	$0.00550
Haiku 4.5	$0.00003	$0.00275

Measured 2d ago against content hash 20882075b0cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

oma-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.

The scan reads SKILL.md. This mod also ships 1 executable file (resources/hotspots.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

100% identical to oma-refactor — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/oma-refactor/SKILL.md · 173 lines

How it starts

The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Refactor Agent - Behavior-Preserving Restructuring Specialist

Scheduling

Goal

Improve internal code structure - readability first - without changing observable behavior, through small verified transformations, each gated by a safety net (tests / tooling / types) and committed separately from any behavior change.

Intent signature

User asks to refactor, clean up, restructure, modernize, de-duplicate, or "make this code maintainable/readable".
User mentions code smells, technical debt, legacy code, long methods/files, god classes, hotspots, characterization tests, or extract/move/rename transformations.
User asks "where should we refactor first?" or wants a refactoring plan/priority for a codebase.

When to use

Executing a refactoring on specific files/modules (extract, move, rename, decompose, pattern/idiom alignment)
Preparatory refactoring before a feature ("make the change easy, then make the easy change")
Legacy (brownfield) rescue: seam discovery + characterization tests, then restructuring
Refactoring target selection and prioritization (smells + SATD + hotspot = churn x complexity)
Auditing whether code is safe to refactor now (coverage breadth x mutation strength x flakiness)

When NOT to use

Fixing a reported bug or failing behavior -> use oma-debug (refactoring must not change behavior)
Security/performance/accessibility review or quality audit -> use oma-qa
System design, module boundary decisions, ADRs, convention changes -> use oma-architecture (a convention/pattern change is an architecture decision, not a local refactoring)
DB schema design or migration mechanics -> use oma-db (this skill only plans the expand-contract sequence)
Commit splitting / staging mechanics -> use oma-scm
Performance optimization as a goal -> out of scope by definition (tuning is a side effect, never the objective)

Expected inputs

target: file/module/path, smell report, SATD marker, or the feature request motivating preparatory refactoring
verification: existing project test command(s); coverage/mutation tooling if already available
constraints: coding guide / conventions, regulated-environment flags, merge-window concerns
Optional: prior metric reports, hotspot data, ADRs touching the target area

Read the full file on GitHub · 173 lines

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.

2d ago Changed · +2 lines 20882075b0cf
15d ago Changed 056d33938e2f
1mo ago Changed · +1 lines · -46 tokens per session feac82492b2a
1mo ago First seen · 170 lines · 71 tokens per session scan A cb6b7cee28ca

Subscribe to this mod's changes

oma-refactor is a skill published in the GitHub repository first-fluke/fullstack-starter (224 stars, last pushed 2d ago), licensed MIT. It adds 25 tokens to every session and 2,752 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to oma-refactor, differing in 0 lines, and is treated as a copy.

Code review Testing fastapi flutter gcp mise monorepo nextjs

pytest-suite

Write or extend the backend test suite following this project's conventions. Use when adding tests for a new service/route/repository, when coverage is missing, or when asked to test a feature. Knows the mocked-session + httpx AsyncClient setup so tests run with no database.

vstorm-co/full-stack-ai-agent-template · 59 tokens

oma-refactor