Borrowing it
Nothing to install: this file belongs to MilindGaharwar/fettle. 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/MilindGaharwar/fettle/main/.github/prompts/fettle-baseline.prompt.mdgit clone --depth 1 https://github.com/MilindGaharwar/fettleWrote 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/commands/milindgaharwar/fettle/fettle-baseline)<a href="https://agentmods.dev/commands/milindgaharwar/fettle/fettle-baseline"><img src="https://agentmods.dev/badge/commands/milindgaharwar/fettle/fettle-baseline/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/commands/milindgaharwar/fettle/fettle-baseline"><img src="https://agentmods.dev/badge/commands/milindgaharwar/fettle/fettle-baseline.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 | $0.00013 | $0.00152 |
| Opus 5.5 | $0.00005 | $0.00061 |
| Sonnet 5.5 | $0.00003 | $0.00030 |
| Haiku 4.5 | $0.00001 | $0.00015 |
Grade A, and why
fettle-baseline 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- baseline — 88% identical, 6 lines differ
What it actually says
/fettle:baseline
Manage violation baselines for gradual adoption.
Usage
Create baseline (snapshot current state)
fettle baseline create
Saves all current findings to .fettle-baseline.json. These findings are grandfathered.
Check against baseline (only new violations)
fettle check --baseline
Update baseline (after fixing some findings)
fettle baseline update
Purpose
Allows adoption in legacy repos without fixing all existing issues first. Only NEW violations are reported; existing ones are tracked but not blocking.
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.
- 1mo ago Changed · +1 lines · +5 tokens per session 701d56f2859a
- 1mo ago First seen · 32 lines · 8 tokens per session scan A 8fd255ff69ea
fettle-baseline is a command published in the GitHub repository MilindGaharwar/fettle (4 stars, last pushed yesterday), licensed Apache-2.0. It adds 13 tokens to every session and 152 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 2026-08-31.
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