The OWASP Cheat Sheet Series was created to provide a concise collection of high value information on specific application security topics.
The OWASP Cheat Sheet Series is a collection of concise guidance on application-security practices and specific security topics. It helps software builders design and maintain more secure applications. Its catalogue add-ons provide agents with ways to reference and apply this security guidance.
3 files for Codex, OpenCode, Claude Code and GitHub Copilot: CheatSheetSeries AGENTS.md, CheatSheetSeries CLAUDE.md, CheatSheetSeries cheatsheets.instructions.md — 4,457 tokens loaded in every session.
AGENTS.md A 2,482 tok CLAUDE.md A 112 tok .github/instructions/cheatsheets.instructions.md A 1,863 tok These files are OWASP/CheatSheetSeries's own configuration — they tell Codex, OpenCode, Claude Code and GitHub Copilot how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.