COP-002: Invalid Frontmatter in Scoped Instructions
Summary
- Rule ID:
COP-002 - Severity:
HIGH - Category:
GitHub Copilot - Normative Level:
MUST - Auto-Fix:
Yes (unsafe) - Verified On:
2026-04-22
Applicability
- Tool:
github-copilot - Version Range:
unspecified - Spec Revision:
unspecified
Evidence Sources
- https://docs.github.com/en/copilot/how-tos/custom-instructions/adding-repository-custom-instructions-for-github-copilot
- https://docs.github.com/en/copilot/reference/custom-instructions-support
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
# TypeScript Instructions
Use strict mode and explicit types.
Valid
---
applyTo: "**/*.ts"
---
# TypeScript Instructions
Use strict mode and explicit types.