Borrowing it
Nothing to install: this file belongs to sorryorc/mythos-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/sorryorc/mythos-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/sorryorc/mythos-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/sorryorc/mythos-mcp/agents-md)<a href="https://agentmods.dev/instructions/sorryorc/mythos-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/sorryorc/mythos-mcp/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/sorryorc/mythos-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/sorryorc/mythos-mcp/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 | $0.00189 | $0.00189 |
| Opus 5.5 | $0.00076 | $0.00076 |
| Sonnet 5.5 | $0.00038 | $0.00038 |
| Haiku 4.5 | $0.00019 | $0.00019 |
Grade A, and why
mythos-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 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.
What it actually says
Agent Guardrails
Workspace
- Use any local working directory; the project does not assume a fixed path.
- If your working directory sits inside a cloud-synced folder (OneDrive / Dropbox / etc.), prefer small patches and verify file integrity after edits — concurrent sync can truncate files mid-write.
Completion Gate
- A generated
dist/directory is not proof of success. - TypeScript must keep
"noEmitOnError": trueso compile errors cannot produce misleading output. - For gate/eval work, "done" means
npm run eval:gatehas run successfully and produced passing metrics. - For repository work, "done" means the relevant test command has run successfully.
- Do not claim completion from edited files, emitted artifacts, or partial checks.
Reporting
- Report the exact verification command and key result.
- If verification did not run, state that the work is unverified.
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 · 17 lines · 189 tokens per session scan A 2dd1b38442e3
mythos-mcp AGENTS.md is an instructions file published in the GitHub repository sorryorc/mythos-mcp (1 stars, last pushed 4mo ago), licensed MIT. It adds 189 tokens to every session, about $0.0008 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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