Instruction files

One page per file type, built from the matrix: 9 file types, 4 tools.

• AGENTS.md

  Open format for agent instructions. May sit in the repository root or in subdirectories.

  • Reads 3
  • Reads, with conditions 1

• AGENTS.override.md

  Override file used by Codex in place of AGENTS.md in the same directory.

  • Reads 1
  • Not read 1
  • Unverified 2

• CLAUDE.md

  Claude Code project instructions file.

  • Reads 3
  • Only if configured 1

• GEMINI.md

  Gemini CLI instructions file.

  • Reads 1
  • Only if configured 1
  • Unverified 2

• .cursorrules

  Single-file rules format used by early Cursor versions.

  • Only if configured 1
  • Migration only 2
  • Unverified 1

• .cursor/rules/*.mdc

  Cursor project rules with frontmatter (description, globs, alwaysApply).

  • Reads 1
  • Migration only 1
  • Unverified 2

• .claude/rules/*.md

  Claude Code topic and path-scoped rules.

  • Reads 1
  • Unverified 3

• .github/copilot-instructions.md

  Repository-wide GitHub Copilot instructions.

  • Reads 1
  • Migration only 1
  • Unverified 2

• .github/instructions/*.instructions.md

  Path-specific GitHub Copilot instructions with an applyTo glob.

  • Reads 1
  • Unverified 3

Cells marked unverified are listed on one page.