Borrowing it
Nothing to install: this file belongs to WhatIfWeDigDeeper/agent-skills. 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/WhatIfWeDigDeeper/agent-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/WhatIfWeDigDeeper/agent-skillsWrote 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/whatifwedigdeeper/agent-skills/claude-md)<a href="https://agentmods.dev/instructions/whatifwedigdeeper/agent-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/whatifwedigdeeper/agent-skills/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/whatifwedigdeeper/agent-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/whatifwedigdeeper/agent-skills/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 | $0.09257 | $0.09257 |
| Opus 5 | $0.04628 | $0.04628 |
| Sonnet 5 | $0.01851 | $0.01851 |
| Haiku 4.5 | $0.00926 | $0.00926 |
Grade C, and why
agent-skills CLAUDE.md scanned grade C 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 9d 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
- **`git worktree remove` does not delete the directory or local branch**: use `-f -f` (overrides agent-isolation lock), then `rm -rf <path>` and `git branch -D <branch>`. **In sandbox mode the directory delete fails "Op Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
- **GraphQL queries with `!` type markers cannot be passed as inline shell strings in zsh** — `String!`, `Int!`, etc. trigger history expansion and produce `UNKNOWN_CHAR` errors from `gh api graphql`. Pass the query via This is a copy
86% identical to agent-skills copilot-instructions.md — 291 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Keep .github/copilot-instructions.md in sync: whenever you add, update, or remove a rule in this file or in any subdirectory CLAUDE.md (e.g. skills/CLAUDE.md, evals/CLAUDE.md, tests/CLAUDE.md, specs/CLAUDE.md), apply the equivalent change to .github/copilot-instructions.md, and ensure .github/copilot-instructions.md includes the reciprocal reminder to mirror rule changes made there back into the appropriate CLAUDE.md. Subdirectory CLAUDE.md files are the canonical home for context-specific rules (skill authoring, eval benchmarks, test conventions); Copilot has only one instructions file, so subdirectory rules still mirror into .github/copilot-instructions.md; a rule dropped from a CLAUDE.md because a subdirectory CLAUDE.md covers it must stay in the Copilot file. The two assistants (Claude Code vs. Copilot) should encode the same project conventions. This applies to /learn as well — when running /learn in this project, always update both the appropriate CLAUDE.md and .github/copilot-instructions.md without asking which to update. The instruction-sync CI check enforces this pairing for any CLAUDE.md path in the repo — it does not compare the two files' content.
Repository Structure
Evals live under evals/ at the repo root, not inside skills/ — they are development artifacts and should not be bundled when a skill is distributed.
Subdirectory CLAUDE.md files: skills/CLAUDE.md (skill format, version bumping, design patterns), evals/CLAUDE.md (benchmarking rules), tests/CLAUDE.md (test naming conventions, CI workflow requirements), and specs/CLAUDE.md (spec-editing rules) auto-load in Claude Code when working in those directories — they are omitted from this root file to reduce context.
New subdirectory CLAUDE.md format: Use # <Name> as the first heading and make the first paragraph note that the file auto-loads when working in <dir>/ — matches the existing pattern in skills/CLAUDE.md and evals/CLAUDE.md.
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.
- 9d ago First seen · 173 lines · 9,257 tokens per session scan C a1deccb671b3
agent-skills CLAUDE.md is an instructions file published in the GitHub repository WhatIfWeDigDeeper/agent-skills (2 stars, last pushed 16d ago), licensed MIT. It adds 9,257 tokens to every session, about $0.0463 per session on Opus 5. A static security scan graded it C with 2 findings (recursive force delete, runs shell commands). It is 86% identical to agent-skills copilot-instructions.md, differing in 291 lines, and is treated as a copy.
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