Agently

Free tool

Write a subagent that actually gets invoked

Fill in the form, get a working agent .md in the standard Claude Code layout. The preview updates as you type and nothing leaves this page. Save the file to .claude/agents/ in your repo, or ~/.claude/agents/ for every project.

good descriptions state when to invoke — Claude picks agents from this line, not from the prompt

Tools

none checked = the agent inherits every tool the main thread has, MCP included

What makes agents get invoked

  • · description specificity beats prompt length — Claude picks agents by description, not by body
  • · state when NOT to use it — it prevents wrong invocations as much as right ones
  • · scope tools down — an agent that only reads should not be able to write
  • · pin cheap models for mechanical work — haiku for formatting and extraction, opus only for judgment

code-reviewer.md

 
 
 
 
 
 
 

Also free: the
skill validator
— paste a SKILL.md and see why it is not triggering.

 
 
 
 
 

These tools check one file. The packs ship dozens that already pass.

 See the packs