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.
npx agentmods add skills/amanktyr/tailor/refactoringnpx skills add AmanKtyr/Tailor --skill refactoringgit clone --depth 1 https://github.com/AmanKtyr/TailorWrote 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.
[](https://agentmods.dev/skills/amanktyr/tailor/refactoring)<a href="https://agentmods.dev/skills/amanktyr/tailor/refactoring"><img src="https://agentmods.dev/badge/skills/amanktyr/tailor/refactoring.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00025 | $0.00444 |
| Opus 5 | $0.00013 | $0.00222 |
| Sonnet 5 | $0.00005 | $0.00089 |
| Haiku 4.5 | $0.00003 | $0.00044 |
Grade A, and why
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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Refactoring Skill
Activate this skill when restructuring existing code, eliminating duplicates, modernizing patterns, decomposing monolithic functions, or pruning dead code.
Refactoring Law: Refactoring improves the internal structure of software without altering its external observable behavior.
1. Safety & Baseline Invariants
Before modifying any existing implementation:
- Verify Baseline Tests: Run existing test suites (
npm test,pytest,cargo test) and confirm that all tests pass before making any changes. - Preserve Public API Contracts: Never alter exported function signatures, route parameters, or database schemas without a documented deprecation plan and updating all internal call sites.
- Atomic, Incremental Changes: Refactor in small, verifiable steps. Never attempt large-scale rewrites in a single unverified commit.
2. Standard Refactoring Patterns
A. Extract Function / Helper
- Problem: Monolithic 200-line function with mixed levels of abstraction.
- Solution: Extract isolated operations into small, single-responsibility pure functions in
src/utils/orsrc/lib/.
B. Introduce Parameter Object
- Problem: Functions accepting 6+ positional arguments (
function createUser(name, email, age, role, status, plan)). - Solution: Replace with a typed configuration object (
interface CreateUserOptions).
C. Strangler Fig Pattern (For Legacy Subsystem Migration)
- Problem: Migrating a legacy service to a new architecture without risky downtime.
- Solution: Build the new implementation alongside the legacy service; route traffic incrementally through a facade until the old system is completely superseded, then prune the legacy code.
3. Duplicate Elimination & Dead Code Pruning
- Search for repeated logic blocks across components using the AST duplicate finder.
- Consolidate duplicate helpers into a shared utility, replace all call sites, and remove dead unused exports.
- Re-run all verification suites and confirm 0 regressions.
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.
- 3d ago First seen · 44 lines · 25 tokens per session scan A d0dcca605d66
refactoring is a skill published in the GitHub repository AmanKtyr/Tailor (3 stars, last pushed 11d ago), licensed MIT. It adds 25 tokens to every session and 444 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 2026-08-31.
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