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 skills add coroboros/agent-skills --skill claude-mdgit clone --depth 1 https://github.com/coroboros/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/skills/coroboros/agent-skills/claude-md)<a href="https://agentmods.dev/skills/coroboros/agent-skills/claude-md"><img src="https://agentmods.dev/badge/skills/coroboros/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/skills/coroboros/agent-skills/claude-md"><img src="https://agentmods.dev/badge/skills/coroboros/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 | $0.00049 | $0.03474 |
| Opus 5 | $0.00024 | $0.01737 |
| Sonnet 5 | $0.00010 | $0.00695 |
| Haiku 4.5 | $0.00005 | $0.00347 |
Grade A, and why
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 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.
How it starts
The opening of the file, as written. The whole thing — 247 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Important — Writing rules
Apply these rules to emitted prose: docs, comments, commit messages, PR bodies, and release notes.
- Match surrounding punctuation, capitalization, and formatting.
- Every sentence changes the reader's understanding. Cut it otherwise.
- Lead with the action or outcome.
- Use concrete language and lists when they improve comparison or sequence.
- Assert positively. Reserve negation for real constraints (
NEVER commit secrets). - No marketing words: powerful, robust, seamlessly, leverage, unlock, comprehensive, delightful.
- No AI tells: delve, tapestry, intricate, pivotal, testament, underscore, crucial, garner, showcase, additionally, moreover, furthermore, indeed.
- For substantive English prose, use
/humanize-enif installed with the existing scope and authorization. It adds no approval stage; skip redundant passes over short status text.
Core Principle
Memory files consume tokens every session. Keep high-value project conventions, commands and boundaries concise. Discoverability alone is not a reason to delete guidance that prevents a demonstrated mistake.
Three mechanisms carry knowledge across sessions:
- CLAUDE.md — single-file instructions you write. Always loaded.
.claude/rules/— modular rule files, optionally path-scoped. Load alongside CLAUDE.md.- Auto memory — notes Claude writes itself per project. See Auto Memory below.
For most projects, CLAUDE.md and rules combine (hybrid pattern). See Workflow > Storage Strategy for the pick-which decision.
Quick Start
Run /init to auto-generate a CLAUDE.md. Or create manually:
# Project Name
## Tech Stack
- [Primary framework]
- [Key non-obvious libraries]
## Commands
- `npm run dev` - Dev server
- `npm test` - Run tests
- `npm run build` - Build
## Rules
- [2-3 critical project-specific rules]
- Run
/memoryto view all loaded files (CLAUDE.md, CLAUDE.local.md, rules), toggle auto memory, and open any file in your editor
What ships with it
14 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/auto-memory.md 1.8 KB
- references/full-example.md 1.2 KB
- references/optimize-guide.md 3.1 KB
- references/project-patterns.md 1.5 KB
- references/prompting-techniques.md 1.8 KB
- references/rules-directory-guide.md 7.9 KB
- references/schemas.md 3.9 KB
- references/section-templates.md 1.6 KB
- scripts/audit_claude_md.py 5.1 KB runs code
- scripts/init_structure.sh 3.3 KB runs code
- scripts/validate_rule_file.py 6.3 KB runs code
- steps/init.md 1.2 KB
- steps/optimize.md 1.4 KB
- steps/revise.md 1.2 KB
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 Changed · -7 lines · -47 tokens per session 0a7d67d64556
- 9d ago First seen · 254 lines · 96 tokens per session scan A ec2f1093b8de
claude-md is a skill published in the GitHub repository coroboros/agent-skills (4 stars, last pushed 3d ago), licensed MIT. It adds 49 tokens to every session and 3,474 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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