Use when the user asks to design, rewrite, organize, compress, or validate the instructions, routing, metadata, includes, or companion prompt files of a skill, agent instruction, rule, or command prompt.
Scanned 9/6/2026
Install to Claude Code
Skills Directorynpx -y skills add cowwoc/cat --skill prompt-builder --agent claude-codeInstalls into .claude/skills of the current project.
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description: Use when the user asks to design, rewrite, organize, compress, or validate the instructions, routing, metadata, includes, or companion prompt files of a skill, agent instruction, rule, or command prompt.
---
# Shared First Use
## Design Goals
- Ensure an agent reads and follows a selected skill's complete instructions once in each conversation context.
## Guidance
If you have not already read this skill's `first-use.md` in the current
conversation context, read it now and follow it exactly. Otherwise, reuse its guidance.
Read `first-use.md` again after the context resets or is compacted.
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Use this skill when developing or maintaining browser extension code in the `browser/` directory, including Chrome/Firefox/Edge compatibility, content scripts, background scripts, or i18n updates.
