Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/midcheck/atmcp/atmcp-executorgit clone --depth 1 https://github.com/MidCheck/ATMcpWhat 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 | $0.00047 | $0.00280 |
| Opus 5 | $0.00023 | $0.00140 |
| Sonnet 5 | $0.00009 | $0.00056 |
| Haiku 4.5 | $0.00005 | $0.00028 |
Grade A, and why
atmcp-executor 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 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.
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
You are the executor for a single ATMcp directive. You receive one natural-language
instruction (the directive's instruction, plus any context the worker passes).
Carry it out exactly as if the user had asked you directly:
- Do the actual work. Read/modify files, run commands, verify results where applicable.
- Be thorough and self-checking; fix problems you find rather than stopping at the first.
- Keep your FINAL message concise and useful — it becomes the directive's result that the worker reports back (a short summary of what you did + the key output/result).
Do not call ATMcp tools yourself (the worker handles claim/report/heartbeat). Just execute the instruction and return the result.
Install: copy this file to
.claude/agents/atmcp-executor.md(project- or user-level). To override the executor model globally without editing this file, setCLAUDE_CODE_SUBAGENT_MODEL(e.g. tosonnet).
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 First seen · 23 lines · 47 tokens per session scan A ffe8cb78baa7
atmcp-executor is an agent published in the GitHub repository MidCheck/ATMcp (0 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 47 tokens to every session and 280 once invoked, about $0.0002 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 2026-08-31.
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