# Feature Implementation

> Use when implementing a feature or multi-file code change - provides structured implementation flow with persona selection, validation, and testing guidance.

- Skill: `tomevault-io/feature-implementation-3` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/feature-implementation-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/feature-implementation-3/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/feature-implementation-3

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# Feature Implementation

## Overview
Guide feature implementation with clear steps: analyze requirements, plan approach, implement safely, and validate with tests.

## When to Use
- Implementing a feature, component, service, or API
- Coordinating multi-domain changes (UI + API + tests)
- Adding tests alongside implementation

Avoid when:
- The task is a trivial one-line change
- You only need a plan (use implementation-workflow)

## Quick Reference

| Task | Load reference |
| --- | --- |
| Implementation workflow | `skills/feature-implementation/references/implement.md` |

## Workflow
1. Clarify requirements and constraints.
2. Load the implementation reference.
3. Implement changes with appropriate personas/tools.
4. Add or update tests.
5. Validate with builds/tests.

## Output
- Implementation summary
- Validation results and remaining risks

## Common Mistakes
- Implementing without tests or validation
- Skipping integration considerations
- Mixing planning and implementation without agreement

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<!-- tomevault:4.0:skill_md:2026-04-11 -->