Borrowing it
Nothing to install: this file belongs to chapmanjw/rutherford-mcp-server. 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/chapmanjw/rutherford-mcp-server/main/AGENTS.mdgit clone --depth 1 https://github.com/chapmanjw/rutherford-mcp-serverWrote 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/instructions/chapmanjw/rutherford-mcp-server/agents-md)<a href="https://agentmods.dev/instructions/chapmanjw/rutherford-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/chapmanjw/rutherford-mcp-server/agents-md/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/instructions/chapmanjw/rutherford-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/chapmanjw/rutherford-mcp-server/agents-md.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 | $0.01827 | $0.01827 |
| Opus 5.5 | $0.00731 | $0.00731 |
| Sonnet 5.5 | $0.00365 | $0.00365 |
| Haiku 4.5 | $0.00183 | $0.00183 |
Grade A, and why
rutherford-mcp-server AGENTS.md 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 2mo 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 — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Guidance for coding agents working in this repository, and the canonical home for it. Written to the AGENTS.md convention so any agent finds the same contract rather than each one needing a file named after its vendor.
CLAUDE.md still exists, because Claude Code reads that name and not this one; it imports this file
and holds nothing of its own. Anything that belongs to every agent belongs here.
Humans want CONTRIBUTING.md, which covers the same ground at more length and adds the review and pull-request expectations.
Commands
uv sync # install deps (project + dev group) into .venv
uv run ruff check . # lint
uv run ruff format . # format (write)
uv run ruff format --check . # format check (CI mode)
uv run mypy # type-check (strict)
uv run python scripts/check_license_headers.py # license-header check
uv run pytest # unit tests only (integration deselected by default)
uv run pytest -m integration # local-only suite that drives real ACP agents
A justfile wraps these. just check is the pre-push gate: it runs scripts/gate.py, which executes
every stage in order (lint, format-check, license-check, typecheck, tests, the per-file coverage floor,
the entrypoint smoke check, and the build), streams their output, and stops at the first failure.
just test-integration drives the real agents. Run a single test file with
uv run pytest tests/test_session.py.
If you are an agent, read the verdict rather than the prose. The gate writes
.tmp/gate-report.toon, which names the stage that failed instead of leaving you to parse output meant
for a human:
schema: 1
head: <sha>
dirty: false # true means uncommitted edits were in the tree, so `head` alone does not describe what ran
verdict: pass # or fail
failed_stage: null # the stage name when verdict is fail
stages[8,]{name,ok,seconds,exit_code}:
lint,true,0.08,0
...
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.
- 2mo ago First seen · 141 lines · 1,827 tokens per session scan A a43bd52b010d
rutherford-mcp-server AGENTS.md is an instructions file published in the GitHub repository chapmanjw/rutherford-mcp-server (7 stars, last pushed 3d ago), licensed MIT. It adds 1,827 tokens to every session, about $0.0073 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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