tech-refactor

tech-refactor is a skill for Claude Code, Codex from nanparth/ai-skill-hub. It costs 82 tokens per session (3,484 once invoked), scanned A, original, MIT.

A structured process for planning large codebase refactors before making high-risk changes. It examines behavior, technical debt, boundaries, migration steps, and removal of old code paths.

In plain words
What is it for?
Overhauling legacy systems, resolving unclear module boundaries, centralizing duplicated logic, and planning architectural migrations.
Why use it?
Large refactors can break hidden behavior or add another competing implementation. The process creates a confidence-rated inventory and an execution-ready roadmap first.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md; mentions subagents; mentions AGENTS.md.

Good fit Overhauling legacy systems, resolving unclear module boundaries, centralizing duplicated logic, and planning architectural migrations.

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Install with agentmods
npx agentmods add skills/nanparth/ai-skill-hub/tech-refactor
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 nanparth/ai-skill-hub --skill tech-refactor
Clone the repo
git clone --depth 1 https://github.com/nanparth/ai-skill-hub

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.

agentmods badge for tech-refactor

README.md
[![agentmods](https://agentmods.dev/badge/skills/nanparth/ai-skill-hub/tech-refactor/github.svg)](https://agentmods.dev/skills/nanparth/ai-skill-hub/tech-refactor)
Your own site
<a href="https://agentmods.dev/skills/nanparth/ai-skill-hub/tech-refactor"><img src="https://agentmods.dev/badge/skills/nanparth/ai-skill-hub/tech-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.

agentmods 80×15 button for tech-refactor

Your own site · 80×15
<a href="https://agentmods.dev/skills/nanparth/ai-skill-hub/tech-refactor"><img src="https://agentmods.dev/badge/skills/nanparth/ai-skill-hub/tech-refactor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,484 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00082 $0.03484
Opus 5.5 $0.00033 $0.01394
Sonnet 5.5 $0.00016 $0.00697
Haiku 4.5 $0.00008 $0.00348

Measured 1mo ago against content hash a708fc3b9f18, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tech-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 1mo 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.

tech-refactor/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

⛔ GATE DISCIPLINE: host user-choice mechanism gates = hard stops. Never skip or auto-pick answer. Tool unavailable → numbered-text fallback → stop, wait for reply. No flag bypasses a gate; override flags pass only as user's recorded gate answer.

/tech-refactor

Release version: 1.4.0

Architectural overhaul of existing systems. 5-phase analysis → subagent execution with TDD and two-stage review.

Core principle: Deletion is the proof of centralization. Adding a new abstraction is not centralization. The old access path must be removed before centralization is complete.

Frontend changes = user-verified. A model cannot see a rendered UI. Any dashboard/view change closes with a numbered visual checklist for the user, not a claimed visual pass.

Not for: surgical cleanup, single-function improvements, extract/rename/DRY — use /simplify.


Pipeline

Phase 1 — Understand   →  confidence-rated behavioural inventory
Phase 2 — Audit        →  risk findings + additive-bias detection
Phase 3 — Clarify      →  targeted questions (conditional — skip if nothing unclear)
Phase 4 — Design       →  target architecture + migration strategy + legacy path retirement plan
Phase 5 — Roadmap      →  execution-ready task list
                          ⛔ user approval gate
Execute                →  independent implementer dispatch per task, sequential (see Execution)

Workflow

  • Phase 1 — Understand ⛔ BLOCKING
    • 1.1 Read target codebase: entry points, module structure, key files
    • 1.2 Produce confidence-rated inventory (high/medium/low):
      • User-facing features, inputs, outputs, side effects
      • External integrations, API shapes, wire formats, config keys, implicit contracts
      • Data models, schemas, business rules, domain rules
      • Duplicate implementations or competing sources of truth
      • Current tests and what behaviour they protect
    • 1.3 Present inventory to user; verdict via a structured choice prompt ⛔ BLOCKING (options: Proceed (Recommended) / Clarify; fallback: numbered text options). Inventory >40 lines → inventory message ends the turn; raise the gate next turn with ≤5-line digest.

Read the full file on GitHub · 147 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. 1mo ago Changed · +60 lines · +15 tokens per session a708fc3b9f18
  2. 1mo ago First seen · 87 lines · 67 tokens per session scan A 336c1058cf80

Subscribe to this mod's changes

tech-refactor is a skill published in the GitHub repository nanparth/ai-skill-hub (23 stars, last pushed 1mo ago), licensed MIT. It adds 82 tokens to every session and 3,484 once invoked, about $0.0003 per session on Opus 5.5. 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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