Borrowing it
Nothing to install: this file belongs to thomaswitt/mcp-agents. 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/thomaswitt/mcp-agents/main/AGENTS.mdgit clone --depth 1 https://github.com/thomaswitt/mcp-agentsWrote 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/thomaswitt/mcp-agents/agents-md)<a href="https://agentmods.dev/instructions/thomaswitt/mcp-agents/agents-md"><img src="https://agentmods.dev/badge/instructions/thomaswitt/mcp-agents/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/thomaswitt/mcp-agents/agents-md"><img src="https://agentmods.dev/badge/instructions/thomaswitt/mcp-agents/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 | $0.05180 | $0.05180 |
| Opus 5.5 | $0.02072 | $0.02072 |
| Sonnet 5.5 | $0.01036 | $0.01036 |
| Haiku 4.5 | $0.00518 | $0.00518 |
Grade B, and why
mcp-agents AGENTS.md scanned grade B with 2 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 yesterday.
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.
Reads MCP configurationmediumAgent snooping
mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.
- Isolated `CODEX_HOME` / `CODEX_SQLITE_HOME` generations copy `auth.json` and `models_cache.json`, selectively mirror explicit Fast mode, all explicit project trust decisions, and the source `model_provider` with its al Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
- Follow existing patterns in `server.js` — switch statements for CLI parsing, Promise wrappers for child_process 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.
- yesterday Changed · +976 tokens per session scan A → B 7f2a5b5d30f1
- 24d ago Changed · +2 lines · +375 tokens per session 8262e5ca2bd6
- 1mo ago Changed · +1 lines · +412 tokens per session 6bb501c5f088
- 1mo ago Changed · +77 tokens per session cf147a69d716
- 1mo ago Changed · +1 lines · +457 tokens per session 114d0ea1f820
- 1mo ago Changed · +2 lines · +97 tokens per session 9693eff26967
- 1mo ago Changed · +209 tokens per session 07b063c82b93
- 2mo ago First seen · 135 lines · 2,577 tokens per session scan A ef1725117bab
mcp-agents AGENTS.md is an instructions file published in the GitHub repository thomaswitt/mcp-agents (21 stars, last pushed 2d ago), with no licence file. It adds 5,180 tokens to every session, about $0.0207 per session on Opus 5.5. A static security scan graded it B with 2 findings (reads mcp configuration, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
mcp-agents AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| mcp-agents AGENTS.mdthomaswitt/mcp-agents | Instructions file | 21 | 2d ago | none | B | 5,180 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |