# Implementation Execution

> Execute development tasks to build features, producing code, tests, and configuration artifacts that satisfy specification requirements and comply with constitution standards.

- Skill: `a5c-ai/implementation-execution` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add a5c-ai/implementation-execution`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/implementation-execution/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/implementation-execution

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- When implementing feature code against a specification
- When running per-task tests during implementation
- When validating implementation against specification requirements

## Key Principle

Every line of code must trace back to a specification requirement. Code quality must meet constitution standards. Tests must verify acceptance criteria from the task definition.

## Process

1. **Prepare environment** - Scaffold directories and configuration
2. **Execute independent tasks** - Parallel execution for tasks without dependencies
3. **Execute dependent tasks** - Sequential execution respecting dependency graph
4. **Run per-task tests** - Verify each task's acceptance criteria
5. **Validate against spec** - Check requirement coverage and story satisfaction
6. **Run integration tests** - Cross-component testing
7. **Human review** - Approve implementation before quality checklist

## Tool Use

Invoke via babysitter process: `methodologies/spec-kit/spec-kit-implementation`
Full pipeline: `methodologies/spec-kit/spec-kit-orchestrator`