Limits and Validation
Character Limits
- 500 characters per block
- 4000 characters total per YAML
YAML Format Rules
- YAML 1.2 compliant
- 2-space indentation, no tabs
- Allowed root fields:
version,language,org,repos
Validation Requirements
- At least one instruction required
- Repo names: alphanumeric,
_or-only - Up to 10 repos, 20 items per
matcharray
Security Checks
- Avoid terms like “ignore above”, “override”, “forget previous”
- Don’t include text that alters AI behavior or review logic
These safeguards ensure consistent and safe PR reviews.
Preview and Verify
Use Show Preview in the Custom Instructions tab to confirm:- YAML structure validity
- Which rules apply to which repositories