Agent Skill Writer skill for Claude and Codex

Agent Skill Writer as an AI skill. It asks for Job the skill does, Existing skill text, Typical trigger phrases and 3 more, then does the rest. Free to…

Install it once and Claude or Codex runs it for you. When your request matches, your AI loads the skill, asks for anything it is missing, and works through the template itself. Prefer to fill it in by hand? See the full prompt template.

Download the skill (.zip) · View SKILL.md

When it is used

Use when an agent skill file needs to be written or shortened so it loads at the right moment and stays easy to follow. Do not use for writing ordinary documentation or a one-off prompt that will not be reused. Related topics: AI, writing.

What it will ask you for

• Job the skill does (longer free text)
• Existing skill text (longer free text)
• Typical trigger phrases (longer free text)
• Neighbouring skills (free text, e.g. "Jobs it could be confused with")
• Reference material (longer free text)
• Mode (choose one: Write new, Trim existing, Audit only)

How it works

1. Draft the description first, with trigger words up front, the result it gives and a clear not-for line.
2. Cut anything the agent already knows, keeping only order of work, judgement calls and output shape.
3. Write the workflow as numbered steps that each end with a completion criterion.
4. Move bulky reference material to files linked one level deep from the skill.
5. Test the result against sample prompts that should and should not load it and report the changes.

What you get

The finished SKILL.md followed by a change list explaining each cut and edit, plus three prompts that should trigger it and one that should not.

What it watches out for

• A vague description such as 'helps with documents', which never loads or loads for everything.
• Explaining basics the agent already knows, which burns context for no gain.
• Chaining reference files through each other, so the agent reads partial files and misses the rule.

How to install

Claude.ai and the Claude desktop app

1. Download the skill .zip.
2. Open Settings, then Capabilities, and find Skills.
3. Choose Upload skill and select the .zip.
4. Ask Claude for help with the task. It loads the skill when your request matches.

Claude Code

1. Download the skill .zip.
2. Unzip it into ~/.claude/skills/ (or .claude/skills/ inside a project).
3. Start a new session. Claude Code loads the skill when your request matches.

Codex

1. Download the skill .zip.
2. Unzip it into ~/.agents/skills/ (or .agents/skills/ inside a project).
3. Codex picks it up on its own. Type $ and the skill name to use it, or just ask for the task.

Cursor

1. Download the Cursor rule (.mdc).
2. Save it in .cursor/rules/ inside your project.
3. Cursor's agent applies the rule when your request matches its description.

AGENTS.md (Codex, Cursor, and other coding agents)

1. Copy the AGENTS.md section.
2. Paste it into AGENTS.md at the root of your repository, creating the file if needed.
3. Coding agents that read AGENTS.md follow it when your request fits.