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/owasp/cheatsheetseries/agents-mdgit clone --depth 1 https://github.com/OWASP/CheatSheetSeriesWhat 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 | $0.01982 | $0.01982 |
| Opus 5 | $0.00991 | $0.00991 |
| Sonnet 5 | $0.00396 | $0.00396 |
| Haiku 4.5 | $0.00198 | $0.00198 |
Grade A, and why
CheatSheetSeries AGENTS.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.
The source is not reproduced here
Licensed CC-BY-SA-4.0
The repository is licensed CC-BY-SA-4.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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 · 102 lines · 1,982 tokens per session scan A af9f01505405
CheatSheetSeries AGENTS.md is an instructions file published in the GitHub repository OWASP/CheatSheetSeries (33,037 stars, last pushed today), licensed CC-BY-SA-4.0. It adds 1,982 tokens to every session, about $0.0099 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.
Other instructions, from other repositories
Agent-Security-Regression-Harness AGENTS.md
Instructions for OWASP/Agent-Security-Regression-Harness, covering ai agent guide: owasp agent security regression harness, project overview, architecture, contribution workflow and what needs doing.
SecEng-Exercises CLAUDE.md
Claude Code instructions for fosres/SecEng-Exercises, covering claude.md, repository overview, repository structure, exercise categories and integer overflow exercises.
appsec-advisor AGENTS.md
AGENTS.md instructions for appsec-foundry/appsec-advisor, covering agents.md, project at a glance, contract hierarchy, rules that always apply and branch flow.
appsec-advisor CLAUDE.md
Claude Code instructions for appsec-foundry/appsec-advisor, a project described as: Claude Code plugin for code-anchored threat modeling and security architecture review.
redteam-skills CLAUDE.md
Instructions for morodomi/redteam-skills, covering redteam-skills, 技術スタック, プロジェクト構造, ワークフロー and エージェント一覧.
stride-gpt AGENTS.md
Instructions for mrwadams/stride-gpt, covering agents.md, what this project is, repository layout, how the agentic analysis works and progressive disclosure pattern.