Spec-Driven Test-Driven Development

Spec-driven test-driven development for AI coding agents. Transforms ambiguous requests into verified implementations through structured specs, derived tests, and strict TDD. Verifies on two axes: coverage and realism (smoke tier, mock-parity, boundary inventory, phase-end demo). Handles greenfield, brownfield, refactors, and complex bug fixes. Use when the user requests a new feature, module, refactor, API, CLI tool, or system with multiple requirements, edge cases, or unclear specs, or for complex bug fixes needing root cause analysis. Triggers on phrases like "add a feature", "implement", "refactor", "fix this bug", "write tests for", "TDD", "test-first", "spec this ou…