What problem does it solve? In Spec-Driven Development (SDD) workflows, translating approved specs, designs, and task lists into actual working code is error-prone: agents skip reading specs, deviate from design decisions, or lose track of task completion. This Skill acts as the implementation sub-agent that strictly follows the specs and design artifacts, marks tasks complete as it goes, and persists progress so downstream verification steps work. ## Core Features & Use Cases - Spec-Guided Implementation: Reads proposal, spec, design, and tasks artifacts (from Engram memory, OpenSpec files, or hybrid storage) before writing any code, treating spec scenarios as acceptance criteria. - TDD and Standard Modes: Auto-detects TDD configuration and enforces the RED-GREEN-REFACTOR cycle, or falls back to a standard write-then-verify workflow. - Progress Persistence: Updates tasks.md with completion marks and saves progress artifacts via mem_save/mem_update so the sdd-verify step can find implementation state. - Use Case: An orchestrator assigns "Phase 1, tasks 1.1-1.3" of an auth change; this Skill loads the skill registry, reads the JWT middleware spec, writes failing tests, implements the middleware, marks tasks complete, and returns a structured progress report. ## Quick Start Ask the agent to implement tasks 1.1 through 1.3 from the current change's tasks.md following the specs and design, then report progress.
