Cursor rule

1---
2description: Authoring agent, skill, and command markdown for cross-harness portability
3globs: ["plugins/*/agents/*.md", "plugins/*/skills/*/SKILL.md", "plugins/*/commands/*.md"]
4---
5 
6# Authoring portable plugin content
7 
8This content ships to Claude Code, Codex CLI, Cursor, OpenCode, and Gemini CLI. The adapter
9framework handles per-harness mechanics, but content choices affect portability.
10 
11## Frontmatter
12 
13- Agents: `name`, `description` (with "Use when…" trigger), `model: opus|sonnet|haiku|inherit`, optional `tools:`, optional `color:`.
14- Skills: `name`, `description`. Other Anthropic SKILL.md fields are optional and respected only on Claude Code.
15- Commands: `description`, `argument-hint`.
16 
17## Body
18 
19- Use action verbs, not tool-name vocabulary: prefer *"open the file"* over *"use the Read tool"*. The adapter rewrites a conservative set, but the unrewritten cases bleed through.
20- Cap skill body at ~8 KB. Push longer reference material into `skills/<name>/references/` files. Codex will hard-truncate at 8 KB anyway.
21- Don't name agents `default`, `worker`, or `explorer` — they collide with Codex built-ins.
22- Don't reference `TodoWrite`, the `Task` spawn tool, or hooks as load-bearing — they don't exist in Codex or Cursor.
23 
24See `docs/authoring.md` for the full guide.
25