Short answer: Yes — GitHub Copilot often speeds test-first TypeScript work by scaffolding tests, suggesting edge cases, and generating mocks/stubs. Risk: it can produce brittle, implementation-tied assertions. Mitigations: create test-first files, prompt for behavior-focused assertions, always review/refactor suggestions into explicit invariants, and enforce coverage and mutation testing. Use Copilot to cut boilerplate, not to replace human review.

Compare Copilot vs Cursor: Compare GitHub Copilot and Cursor