CC-SK-015: Invalid user-invocable Type - Claude Skills

Summary

• Rule ID: CC-SK-015
• Severity: HIGH
• Category: Claude Skills
• Normative Level: MUST
• Auto-Fix: No
• Verified On: 2026-07-26

Applicability

• Tool: claude-code
• Version Range: >=2.1.218
• Spec Revision: unspecified

Evidence Sources

• https://code.claude.com/docs/en/skills
• https://github.com/anthropics/claude-code/releases/tag/v2.1.218

Test Coverage Metadata

• Unit tests: true
• Fixture tests: true
• E2E tests: false

Examples

The following examples demonstrate what triggers this rule and how to fix it.

Invalid

---
name: slash-cmd
description: Use when user types the slash command
user-invocable: "maybe"
---
Handle the slash command.

Valid

---
name: slash-cmd
description: Use when user types the slash command
user-invocable: on
---
Handle the slash command.