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 agentmods add instructions/cdsecurity/cdsecurity-skills/claude-mdgit clone --depth 1 https://github.com/CDSecurity/cdsecurity-skillsWhat 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 | $0.00322 | $0.00322 |
| Opus 5 | $0.00161 | $0.00161 |
| Sonnet 5 | $0.00064 | $0.00064 |
| Haiku 4.5 | $0.00032 | $0.00032 |
Grade A, and why
cdsecurity-skills 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 2d 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
CLAUDE.md
Instructions for Claude when contributing to this repository.
What This Repo Is
A library of Claude Code skills for smart contract security, built by CD Security. Each skill is a self-contained capability in its own directory.
Structure
audit-prep/ # Solidity audit preparation (Foundry/Hardhat)
SKILL.md # Orchestrator
VERSION # Skill version
references/ # Agent instructions and shared rules
agents/ # Per-agent instructions (testing, source, infra)
shared-rules.md # Common output format for agents
evals/ # Test cases and grading scripts
rust-audit-prep/ # Rust/Solana audit preparation (Anchor/native)
SKILL.md # Orchestrator
references/ # Agent instructions, checklist, shared rules
agents/ # Per-agent instructions (testing, source, infra)
checklist.md # Full check reference
shared-rules.md # Common output format for agents
report-template.md # Detailed report template
Rules
- One skill, one purpose.
- Keep SKILL.md under 500 lines — use references/ for agent-specific instructions.
- No gas optimization checks — out of scope for audit preparation.
- No vulnerability analysis — agents must not perform security assessments.
- Every FAIL finding must include a specific, actionable fix.
- Do not commit secrets, API keys, or personal data.
- Test changes against both eval projects (Hardhat + Foundry) before submitting.
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.
- 2d ago First seen · 38 lines · 322 tokens per session scan A 733cc7b99977
cdsecurity-skills CLAUDE.md is an instructions file published in the GitHub repository CDSecurity/cdsecurity-skills (51 stars, last pushed 4mo ago), licensed MIT. It adds 322 tokens to every session, about $0.0016 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 2026-08-30.
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