he-implement

Execute active development plans with milestone tracking and parallel subagent tasks.

4|1|Updated Feb 14, 2026

Search Tags:#development #implementation #verification #plan execution #coding #milestones

Ready to run

npx skills add https://github.com/mattjefferson/harness-engineering --skill he-implement

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: he-implement
Source: https://github.com/mattjefferson/harness-engineering/tree/main/skills/he-implement
Command: npx skills add https://github.com/mattjefferson/harness-engineering --skill he-implement

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill automates the execution of software development plans, ensuring code is written according to defined milestones and that progress is continuously tracked and verified.

Core Features & Use Cases

Plan-driven execution: Implements tasks directly from active execution plans (.md files).
Milestone tracking: Progresses through defined milestones, updating the plan artifact.
Evidence gathering: Encourages continuous verification and evidence collection during implementation.
Use Case: After a plan is created with he-plan, this skill takes over to write the code, run tests, and update the plan with completed steps and any new discoveries.

Quick Start

Use the he-implement skill to execute the active plan for the 'user-auth' feature.

Frequently Asked Questions about he-implement

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I execute a software development plan and track milestones automatically?▼

Plan-driven execution automates software development by reading active execution plans and managing milestone progress. It writes code, runs tests, and updates the plan artifact with completed steps and discoveries incrementally.

What is milestone tracking in software implementation?▼

Milestone tracking in software implementation progresses through defined development stages, updating living plan artifacts with outcomes and discoveries. It ensures parallel subagent tasks are managed while maintaining continuous evidence gathering.

How do I run coding tasks from a markdown plan file?▼

You can run coding tasks from a markdown plan file by executing active execution plans directly. The system reads the `.md` file, implements tasks according to defined milestones, and commits work using conventional messaging.

Can I use parallel subagent tasks for software development?▼

Parallel subagent tasks are supported for software development, managing multiple implementation streams simultaneously. The system ensures workspace isolation while executing plan-driven implementation and gathering continuous verification evidence.

Does plan execution work with conventional commit messaging?▼

Plan execution integrates changes incrementally and commits work according to conventional commit messaging. It updates living plan artifacts with outcomes and discoveries gathered during the implementation process.

What are the limitations of automated plan execution for coding?▼

Automated plan execution requires pre-existing active execution plans to function. It is limited to implementing tasks defined in plan artifacts and cannot generate plans independently, relying on external plan creation first.