Borrowing it
Nothing to install: this file belongs to agentdecksdk/agentdeck. 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/agentdecksdk/agentdeck/dev/CLAUDE.mdgit clone --depth 1 https://github.com/agentdecksdk/agentdeckWrote 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/agentdecksdk/agentdeck/claude-md)<a href="https://agentmods.dev/instructions/agentdecksdk/agentdeck/claude-md"><img src="https://agentmods.dev/badge/instructions/agentdecksdk/agentdeck/claude-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/agentdecksdk/agentdeck/claude-md"><img src="https://agentmods.dev/badge/instructions/agentdecksdk/agentdeck/claude-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 | $0.02000 | $0.02000 |
| Opus 5.5 | $0.00800 | $0.00800 |
| Sonnet 5.5 | $0.00400 | $0.00400 |
| Haiku 4.5 | $0.00200 | $0.00200 |
Grade A, and why
agentdeck CLAUDE.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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AgentDeck
AgentDeck is a declarative runtime harness for multi-agent systems and workflows (OpenAI Agents SDK, plus AgentDeck-native @tool/@workflow).
Core standards: docs/engineering/: the linked suite of binding engineering law:
docs/engineering/principles.md: Product philosophy, and the standard a feature is held to (Q1-Q7).docs/engineering/coding-standards.md: Binding front door for every code change.docs/engineering/coding-agents.md: Mandatory rules for coding agents.docs/engineering/documentation.md: Binding for every page underdocs-site/content/.- Specialized standards:
architecture.md,runtime-contracts.md,testing.md,dependencies.md,repository-policy.md,import-boundaries.md. docs/patterns/: the project's taste as real good/bad pairs. Read the file for your concern before writing; match the good side.
Every file under docs/ declares its status on line 3, from four words, so law is distinguishable from archaeology without opening it:
| Status | Means | Where |
|---|---|---|
| Binding | a change that violates it is wrong | all of docs/engineering/ and docs/patterns/, the 16 files above |
| Design of record | live rulings; amend it rather than contradicting it | docs/design/ including protocols/, and docs/delivery/, whose plans are cited by ruling number from tests and source |
| Reference | true, not law | docs/brand/README.md |
| History | a state the project has left. Usually it is deleted instead: git is the archive, and #734 deleted the eight that nothing read | nothing, currently |
A version in a History title is that document's own subject, not a stale claim about this repository.
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.
- 1mo ago Changed · +17 lines · +485 tokens per session 7e92c2a74d22
- 1mo ago Changed · +2 lines · +80 tokens per session 5471bb75c19f
- 2mo ago First seen · 70 lines · 1,435 tokens per session scan A 480e061430f4
agentdeck CLAUDE.md is an instructions file published in the GitHub repository agentdecksdk/agentdeck (4 stars, last pushed yesterday), licensed MIT. It adds 2,000 tokens to every session, about $0.0080 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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