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Version: 0.56.5

CC-SK-020: Invalid Shell Value - Claude Skills

Summary​

  • Rule ID: CC-SK-020
  • Severity: MEDIUM
  • Category: Claude Skills
  • Normative Level: MUST
  • Auto-Fix: Yes (unsafe)
  • Verified On: 2026-03-28

Applicability​

  • Tool: claude-code
  • Version Range: unspecified
  • Spec Revision: unspecified

Evidence Sources​

Test Coverage Metadata​

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

Examples​

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

Invalid​

---
name: my-skill
shell: zsh
---
Skill instructions.

Valid​

---
name: my-skill
shell: bash
---
Skill instructions.