What problem does it solve?
This skill eliminates the risk of ad-hoc, untested code that leads to recurring bugs, rework, and inconsistent code quality by enforcing a strict test-first TDD workflow with built-in quality guardrails for every implementation task.
Core Features & Use Cases
- Dual Execution Modes: Supports normal mode for implementing individual tasks from pre-defined development plans, and quick mode for lightweight fixes and adjustments without requiring a pre-built plan.
- Built-in Quality Guardrails: Automatically enforces 500-line file limits, runs security and performance vulnerability checks, validates test coverage against project thresholds, and generates traffic-light confidence reports to flag areas needing human review.
- Use Case: For example, when you need to implement a new user authentication endpoint as part of a planned development task, use this skill to write failing tests first, implement the code to pass those tests, run all required quality checks, and get a clear report of any design decisions that need human validation.
Quick Start
Use the dev-impl skill to implement the user profile update task from your project plan using test-first TDD with automatic quality checks.