Compatibility Caveats

This page summarizes caveats from the extension-system research matrix.

Cross-host matrix (concise)

Area	Claude Code	Codex	Cursor	OpenCode
Primary project instructions	`CLAUDE.md`	`AGENTS.md`	`.cursor/rules/*.mdc`	`AGENTS.md`
Plugin command model	supported	use `@plugin` + skills	supported	supported
Hooks model	plugin + settings	external hooks config	hooks.json	plugin runtime hooks
Skill limits (notable)	short display truncation	1024-char description cap	strict name/path expectations	plugin-managed skill loading

For the generated repo-level support matrix, see Compatibility / limits.