task_receipts/docs/testing-rules.md

Testing and Code Quality Rules

• No non-null assertions: Non-null assertions (the ! operator) are a hack for missing null checks or extraneous null types. Always use proper null checks and handle possible null/undefined values explicitly.
• Do not throw errors within tests: Use proper test assertions (e.g., expect(value).not.toBeNull()) instead of throwing errors from within tests. This ensures test failures are reported clearly and consistently.