Borrowing it
Nothing to install: this file belongs to pelagornis/prompt-guide. 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/pelagornis/prompt-guide/main/CLAUDE.mdgit clone --depth 1 https://github.com/pelagornis/prompt-guideWrote 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/pelagornis/prompt-guide/claude-md)<a href="https://agentmods.dev/instructions/pelagornis/prompt-guide/claude-md"><img src="https://agentmods.dev/badge/instructions/pelagornis/prompt-guide/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/pelagornis/prompt-guide/claude-md"><img src="https://agentmods.dev/badge/instructions/pelagornis/prompt-guide/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 | $0.00490 | $0.00490 |
| Opus 5 | $0.00245 | $0.00245 |
| Sonnet 5 | $0.00098 | $0.00098 |
| Haiku 4.5 | $0.00049 | $0.00049 |
Grade A, and why
prompt-guide 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 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.
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
Project instructions (Claude Code)
This repository uses prompt-guide: layered Markdown, a single prompt.config.js, and layers.manifest.yml (merge order for bundles).
What to read first
prompt.config.js—tool,platform,layers.source,layers.manifest, context, task presets.layers.manifest.yml(repo root) — orderedsystem:paths relative tolayers.source;review.pathfor review mode.- Layer tree under
layers.source(default.claude/) —initcopies the same layout to.cursor/,.claude/,codex/(no…/ai/subfolder).
Prefer opening those Markdown files over assuming a single monolithic instruction block.
After prompt-guide install with tool: 'claude'
.claude/rules/ai-core.md— system bundle from the manifest..claude/rules/ai-review.md— review bundle.
Keep this file short (Anthropic recommends concise project instructions); put detail in .claude/ (Markdown tree) and prompts/.
Conventions this template follows
- Cursor / IDE agents: version-controlled rules under
.cursor/rules/, small composable.mdc/.mdfiles with YAML frontmatter where applicable (Cursor docs — Rules). - Codex / similar:
AGENTS.mdat the project root when usingtool: 'codex'(common pattern for repo-level agent instructions). - Claude Code: root
CLAUDE.mdplus optional.claude/rules/*.md(Claude Code best practices).
Regenerate tool outputs when you change tool in prompt-guide install; edit .claude/ Markdown and layers.manifest.yml without reinstalling for file-based tools (Cursor).
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 · 27 lines · 490 tokens per session scan A 06a3acaa36ba
prompt-guide CLAUDE.md is an instructions file published in the GitHub repository pelagornis/prompt-guide (2 stars, last pushed 9d ago), licensed MIT. It adds 490 tokens to every session, about $0.0024 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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