Borrowing it
Nothing to install: this file belongs to isdou/codeck. 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/isdou/codeck/main/AGENTS.mdgit clone --depth 1 https://github.com/isdou/codeckWrote 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/isdou/codeck/agents-md)<a href="https://agentmods.dev/instructions/isdou/codeck/agents-md"><img src="https://agentmods.dev/badge/instructions/isdou/codeck/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/isdou/codeck/agents-md"><img src="https://agentmods.dev/badge/instructions/isdou/codeck/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 | $0.00186 | $0.00186 |
| Opus 5.5 | $0.00074 | $0.00074 |
| Sonnet 5.5 | $0.00037 | $0.00037 |
| Haiku 4.5 | $0.00019 | $0.00019 |
Grade A, and why
codeck 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
Codeck Usage
Use Codeck only when the user explicitly mentions codeck, Gemini, Claude, Antigravity, agy, or another configured external executor.
Do not use Codeck just because a task looks like analysis, review, comparison, long-context reading, or UI feedback. Codex should not choose another model on the user's behalf.
Default flow:
- Use
codeck pick "<task>"to preview the executor when unsure. - Use
codeck ask auto "<task>"for read-only questions. - Use
codeck delegate auto "<task>" -yonly when the user explicitly wants implementation by another executor. - Use
codeck compare claude_architect,gemini_frontend "<task>"when the user asks for comparison or tradeoffs.
Do not route trivial local shell checks, direct file edits, or tasks Codex can complete faster itself.
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 · 15 lines · 186 tokens per session scan A 5d35ec591b07
codeck AGENTS.md is an instructions file published in the GitHub repository isdou/codeck (2 stars, last pushed 26d ago), licensed MIT. It adds 186 tokens to every session, about $0.0007 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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