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 skills add steph-dove/klaussy-agents --skill fastapi-refactorgit clone --depth 1 https://github.com/steph-dove/klaussy-agentsWrote 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/steph-dove/klaussy-agents/fastapi-refactor)<a href="https://agentmods.dev/skills/steph-dove/klaussy-agents/fastapi-refactor"><img src="https://agentmods.dev/badge/skills/steph-dove/klaussy-agents/fastapi-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.
<a href="https://agentmods.dev/skills/steph-dove/klaussy-agents/fastapi-refactor"><img src="https://agentmods.dev/badge/skills/steph-dove/klaussy-agents/fastapi-refactor.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00049 | $0.01200 |
| Opus 5 | $0.00024 | $0.00600 |
| Sonnet 5 | $0.00010 | $0.00240 |
| Haiku 4.5 | $0.00005 | $0.00120 |
Grade A, and why
fastapi-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 10d 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- httpx-refactor — 98% identical, 2 lines differ
- {{REPO}}-refactor — 97% identical, 3 lines differ
How it starts
The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Refactor the code the user described. The goal is to change structure while preserving behavior exactly. Do NOT change what the code does — only how it's organized.
Phase 1: Establish the Safety Net
Before changing any code, confirm you have tests that cover the current behavior.
- Read CLAUDE.md for project structure, test commands, and conventions.
- Read any
.claude/rules/*.mdwhosepaths:glob matches the area being refactored — they encode the conventions the moved code must continue to obey. - Run the existing test suite. Record the results — every test must pass before you start. If tests are failing already, stop and report that. Do not refactor code that doesn't have a passing baseline.
- Assess coverage of the code you plan to change. Read the existing tests for the modules involved. If a function you're restructuring has no tests:
- Write tests for its current behavior first.
- Run them to confirm they pass.
- These are your regression guardrails — they prove the refactor didn't break anything.
Phase 2: Understand the Current Code
Read the code you're refactoring in full. The three checks below are independent — issue them as a single batch of parallel tool calls, not sequentially:
- What it does — the inputs, outputs, side effects, and edge cases. Read the file(s) in full.
- Who calls it — grep for callers across the whole repo. Every caller is a contract you must preserve.
- What depends on its interface — function signatures, return types, exceptions thrown, event emissions. Grep for type/import references too. These are the things you cannot change without updating all consumers.
Phase 3: Plan the Refactor
Design the target structure before editing.
- Describe the structural change — what moves where, what gets renamed, what gets split or merged.
- List what must NOT change — public interfaces, return values, side effects, error behavior. Be explicit.
- Plan incremental steps. Break the refactor into the smallest possible moves that each leave the code in a working state. Never change behavior and structure in the same step. For example:
- Step 1: Extract a function (tests still pass).
- Step 2: Move the function to a new module (tests still pass).
- Step 3: Update callers to use the new location (tests still pass).
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.
- 10d ago First seen · 88 lines · 49 tokens per session scan A 2803fc868a7e
fastapi-refactor is a skill published in the GitHub repository steph-dove/klaussy-agents (16 stars, last pushed 13d ago), licensed MIT. It adds 49 tokens to every session and 1,200 once invoked, about $0.0002 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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