Skills are visible in the slash command menu by default; opt-out with user-invocable: false in YAML frontmatter.

Setup

The test evaluated skill discoverability in Claude Code. Eight test skills were created in the .claude/skills/ directory without explicit user-invocable declarations in their YAML frontmatter. The runtime was then queried for available slash commands matching the prefix "test".

Test and Result

Claude Code was asked to list all available slash commands starting with "test". All eight skills appeared in the slash menu without configuration:

• test-custom-agent
• test-bad-agent
• test-language
• test-agent-tools
• test-hooks
• test-agent-field
• test-fork
• test-yaml-tools

Result: PASS.

Visibility Mechanics

Skills in .claude/skills/ register as user-invocable slash commands with no additional steps. The runtime treats discoverability as the default state. To explicitly hide a skill from the menu, developers add the YAML field:

---
user-invocable: false
---

This opt-out pattern reduces friction for skill discovery and encourages visibility of new capabilities without requiring maintainers to opt each skill into publication.