Borrowing it
Nothing to install: this file belongs to joachimBrindeau/domain-mcp. 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/joachimBrindeau/domain-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/joachimBrindeau/domain-mcpWrote 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/joachimbrindeau/domain-mcp/agents-md)<a href="https://agentmods.dev/instructions/joachimbrindeau/domain-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/joachimbrindeau/domain-mcp/agents-md.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 5.1 | $0.00399 | $0.00399 |
| Opus 5 | $0.00199 | $0.00199 |
| Sonnet 5 | $0.00080 | $0.00080 |
| Haiku 4.5 | $0.00040 | $0.00040 |
Grade A, and why
domain-mcp 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 8d 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.
What it actually says
Engineering principles
KISS, SSOT, DRY, SOLID, MECE.
- Prefer a library over custom code. Reach for a maintained library before writing your own version of a solved problem. If you catch yourself writing a second implementation of a standard, stop and use the standard. Check the skill or repo you are working in for a shipped script before writing one.
- Always the latest version. Pin dependencies to the current release and look it up rather than recalling it. A version from memory is a guess.
- One way, the best one. No fallbacks, no circumvention, no case-specific branch beside a general one. A fallback does not degrade the answer visibly, it degrades it invisibly, which is the failure mode you cannot debug from the output. When a prerequisite is missing, exit and name the fix.
- One source of truth. Any fact that appears twice will drift. Derive the copies from the source, or keep only the source.
- Online information goes through
agent-reach. It is the single adapter for search and platform content, its search backend issearch.klarc.eu, and it routes library and framework documentation tocontext7viamcporter. Readagent-reach/references/dev.mdbefore reaching for anything else. Do not substitute an ad-hoc fetch, and do not wire a second route to a capability it already covers. - Every fix ships with a check that fails without it. Verify by mutation: break the fix, watch the check fail, restore it.
- Never let a doc state what the code does not do. Derive documentation from the running code wherever that is possible.
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.
- 8d ago First seen · 29 lines · 399 tokens per session scan A f403ea76c889
domain-mcp AGENTS.md is an instructions file published in the GitHub repository joachimBrindeau/domain-mcp (12 stars, last pushed yesterday), licensed MIT. It adds 399 tokens to every session, about $0.0020 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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