plan-implementation

Plan Implementation

Purpose

This skill implements one approved implementation plan.

Implementation is the execution of an approved engineering contract.

The objective is to translate documented project intent into production-ready implementation while preserving architecture, engineering conventions, and repository consistency.

Implementation should satisfy the approved plan without introducing unrelated work.

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Lifecycle Stage

Plan Review
        ↓
Plan Implementation
        ↓
Code Review

Plan Implementation realizes the approved implementation increment.

It does not redesign the project.

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Role

Primary role:

Implementation Agent

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When to Use

Use this skill when:

• an implementation plan has been approved;
• implementation has been authorized;
• required project documentation exists.

Do not begin implementation before Plan Review has approved the plan.

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Inputs

Required:

• approved implementation plan;
• PROJECT.md;
• ROADMAP.md;
• ARCHITECTURE.md;
• ENGINEERING.md.

Additional references:

• ADRs;
• completed plans;
• current repository state.

The approved implementation plan is the authoritative engineering contract.

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Outputs

Produce:

• production-ready implementation;
• tests where appropriate;
• updated documentation when required;
• completed implementation checklist;
• implementation ready for Code Review.

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Procedure

Step 1 — Understand the Engineering Contract

Review the implementation plan.

Verify:

• objective;
• scope;
• out-of-scope items;
• acceptance criteria;
• validation requirements;
• implementation constraints.

Implementation must not begin until the contract is fully understood.

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Step 2 — Build Project Context

Review:

• project definition;
• roadmap;
• architecture;
• engineering design;
• ADRs;
• current implementation.

Understand:

• why the implementation exists;
• architectural boundaries;
• engineering conventions;
• existing repository structure.