Borrowing it
Nothing to install: this file belongs to rynfar/meridian. 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/rynfar/meridian/main/AGENTS.mdgit clone --depth 1 https://github.com/rynfar/meridianWrote 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/rynfar/meridian/agents-md)<a href="https://agentmods.dev/instructions/rynfar/meridian/agents-md"><img src="https://agentmods.dev/badge/instructions/rynfar/meridian/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/rynfar/meridian/agents-md"><img src="https://agentmods.dev/badge/instructions/rynfar/meridian/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 | $0.01406 | $0.01406 |
| Opus 5.5 | $0.00562 | $0.00562 |
| Sonnet 5.5 | $0.00281 | $0.00281 |
| Haiku 4.5 | $0.00141 | $0.00141 |
Grade A, and why
meridian 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 2d 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 2d ago Changed · +1 lines · +113 tokens per session 738e2363ce9d
- 9d ago Changed · +18 tokens per session dd756e017dcf
- 15d ago Changed · +1 lines · +60 tokens per session 8fe069b01b43
- 16d ago Changed · +2 lines · +64 tokens per session d065d5594a1c
- 23d ago Changed · +2 lines · +93 tokens per session 72711309e19c
- 1mo ago Changed · +4 lines · +216 tokens per session d31b40139c0b
- 1mo ago Changed · +9 tokens per session 611d400b579f
- 1mo ago Changed · -156 lines · -1,439 tokens per session 0b6cdf79b319
- 1mo ago Changed · +20 lines · +473 tokens per session ae757f768cb8
- 2mo ago First seen · 167 lines · 1,799 tokens per session scan A 0c39debfbc2d
meridian AGENTS.md is an instructions file published in the GitHub repository rynfar/meridian (2,165 stars, last pushed yesterday), with no licence file. It adds 1,406 tokens to every session, about $0.0056 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 2026-08-30.
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