Borrowing it
Nothing to install: this file belongs to rajbos/ai-engineering-fluency. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/rajbos/ai-engineering-fluency/main/.claude/agents/refactor.mdgit clone --depth 1 https://github.com/rajbos/ai-engineering-fluencyWrote 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/agents/rajbos/ai-engineering-fluency/refactor)<a href="https://agentmods.dev/agents/rajbos/ai-engineering-fluency/refactor"><img src="https://agentmods.dev/badge/agents/rajbos/ai-engineering-fluency/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/agents/rajbos/ai-engineering-fluency/refactor"><img src="https://agentmods.dev/badge/agents/rajbos/ai-engineering-fluency/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 | $0.00020 | $0.00248 |
| Opus 5.5 | $0.00008 | $0.00099 |
| Sonnet 5.5 | $0.00004 | $0.00050 |
| Haiku 4.5 | $0.00002 | $0.00025 |
Grade A, and why
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 yesterday.
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.
What it actually says
Code Refactor - Improve Quality & Security
Clean up code, apply security best practices, and enhance design whilst keeping all tests green.
Core Principles
Refactor the target code for readability, security, and design quality while
keeping all tests green. Apply this repo's TypeScript conventions (strict
mode, no new any, injected rather than ambient dependencies) and standard
security hygiene (validate external input, no secrets in code, sanitize
webview content against XSS, run npm audit for dependency vulnerabilities).
Make small, test-verified increments.
Execution Guidelines
- Ensure green tests - All tests must pass before refactoring
- Small incremental changes - Refactor in tiny steps, running tests frequently
- Apply one improvement at a time - Focus on single refactoring technique
- Run security analysis - Use static analysis tools (ESLint, SonarQube)
- Document security decisions - Add comments for security-critical code
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.
- yesterday First seen · 28 lines · 20 tokens per session scan A 571f5f50c362
refactor is an agent published in the GitHub repository rajbos/ai-engineering-fluency (119 stars, last pushed yesterday), licensed MIT. It adds 20 tokens to every session and 248 once invoked, about $0.0001 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 2026-10-26.
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