Breakdown Feature Implementation Skill: PRD to Technical Plan

Turns a feature PRD into a detailed engineering implementation plan in Markdown, with Mermaid diagrams. Listed in github/awesome-copilot.

Installs: 9.2K; on skills.sh
Stars: 40.7K; on GitHub
Updated: Oct 2026; last repo commit

breakdown-feature-implementation makes your agent act as a veteran SaaS engineer and write a thorough plan from a Feature PRD you paste in. The plan covers file layout, goal, requirements, system architecture, database schema, API design, front-end structure, security and performance. It says not to write code except pseudocode.

It saves the plan to /docs/ways-of-work/plan/{epic-name}/{feature-name}/implementation-plan.md. The skill is written for one team's stack, named in the text as Epoch's monorepo, tRPC, Stack Auth, shadcn/ui and Zustand/React Query. Adapt those to yours.

Good for

Product-minded engineers who already have a feature PRD
Tech leads who want architecture, database and API design written down before coding
Teams on a monorepo with apps, services and packages folders

Install breakdown-feature-implementation

Claude Code

Copy this prompt.

Install the breakdown-feature-implementation skill in Claude Code. Run this command:

npx skills add https://github.com/github/awesome-copilot --skill breakdown-feature-implementation

Then check that it loaded and tell me how to use it.

2
Paste it into Claude Code. It shows the change and asks before running it.

Requires Node.js.

The awesome-copilot README is written for GitHub Copilot. It does not name Claude Code, so these are the standard skill-folder routes.

Built from the package data we hold. Not yet tested by us. Source.

What's in the skill

When it loads

Prompt for creating detailed feature implementation plans, following Epoch monorepo structure.

Sections in SKILL.md

Goal
Output Format
File System
Implementation Plan
Context Template

Key facts

Author: Plugin author listed as Awesome Copilot Community (project-planning plugin.json)
License: MIT (LICENSE file of the awesome-copilot repo)
Installs on skills.sh: 9,243 (Nov 2, 2026)
GitHub stars: 40,666 for the whole awesome-copilot repo (Nov 2, 2026)
Last repo commit: Oct 30, 2026
Files in the folder: 1 file: SKILL.md
Part of: The project-planning plugin (8 skills and 7 agents listed in plugin.json)

What it includes

Reads the Feature PRD you provide as the context for the plan
The prompt ends with a context template that holds the content of the Feature PRD markdown file.
Read · Input: Feature PRD
Lists the folders for front-end and back-end under apps, services and packages
The layout follows what SKILL.md calls Epoch's monorepo structure.
File system layout
Writes a 3 to 5 sentence goal and a bulleted requirement list
Each feature gets a goal and detailed requirements with implementation specifics.
Goal and requirements
Draws a Mermaid diagram across five layers with labeled data flow
The layers are frontend, API, business logic, data and infrastructure. It also asks for stack choices, integration points, deployment and scaling notes.
System architecture overview
Draws a Mermaid entity-relationship diagram and specifies tables and indexes
Also covers foreign keys and the migration strategy.
Database schema design
Specifies endpoints, TypeScript types, Stack Auth rules, errors, rate limits and caching
The text names tRPC endpoints and Stack Auth.
API design
Documents the component tree with shadcn/ui parts, state flow and TypeScript types
It includes a sample layout tree for a recipe library page and asks for Zustand and React Query state patterns.
Frontend architecture
Lists auth rules, validation, performance work and caching
The last of five technical-consideration sections.
Security and performance
Writes implementation-plan.md under /docs/ways-of-work/plan/{epic-name}/{feature-name}/
The output path is fixed by the prompt.
Write · Save the plan

From the official docs

Permissions

Low risk

The skill writes one plan file, and the Copilot plugin route adds agents that can edit files, run commands and open GitHub issues. Use the skill-only route unless you want those agents.

What it can do

Read your data
Create and change things
Delete things
Read-only mode

Watch out for

The Copilot plugin adds agents that can edit files
The plugin lists 7 agents. implementation-plan, task-planner, task-researcher and research-technical-spike include edit and terminal-run tools. prd includes create_issue, update_issue and add_issue_comment. Install only the skill if you do not want these. github.com
It writes a file into your repo
The plan is saved to /docs/ways-of-work/plan/{epic-name}/{feature-name}/implementation-plan.md. It would replace a file of the same name, so check the path first. github.com
Community content, not reviewed by GitHub for you
The awesome-copilot README says the customizations are sourced from third-party developers and asks you to inspect them before installing. Read the SKILL.md first. github.com

Technical details

Scopes	Writes one Markdown plan file under /docs/ways-of-work/plan/ The Copilot plugin route adds 7 agents (see findings)

Questions

What does breakdown-feature-implementation do?

It turns a Feature PRD into a full technical plan: file layout, architecture and database diagrams, API and front-end design, security and performance. It saves the result as a Markdown file.

How do I install it?

Use the install box above. In GitHub Copilot CLI it can also come with the project-planning plugin, which adds seven agents. Read the safety box before you take the plugin.

Where does the plan go?

To /docs/ways-of-work/plan/{epic-name}/{feature-name}/implementation-plan.md, a path fixed in the prompt. Tell your agent the epic and feature names.

Does it write code?

No code, per SKILL.md: "Do NOT write code in output unless it's pseudocode for technical situations."

Is it tied to a specific tech stack?

Yes. The prompt names Epoch's monorepo layout, tRPC, Stack Auth, shadcn/ui, Zustand and React Query. If your stack differs, say so up front.

Is it safe?

The skill itself bundles no scripts and writes one Markdown file. The larger risk is the project-planning plugin, whose agents can edit files, run terminal commands or create GitHub issues. Skip the plugin if you only want this skill.

Does it work in Claude Code or the Claude app?

The file is a standard SKILL.md, and the install box shows how to place it in Claude Code or upload it to Claude. The awesome-copilot README targets GitHub Copilot, and nothing in the repo says this skill was tested in Claude.

Information

updated Nov 2, 2026

Repository: github/awesome-copilot
Folder: skills/breakdown-feature-implementation

github/awesome-copilot skills.sh

Sources

Docs, issue trackers and discussions this page is built from.

Show all 6

github/awesome-copilot README · github.com
project-planning plugin.json · github.com
breakdown-feature-implementation SKILL.md · github.com
implementation-plan agent · github.com
prd agent · github.com
task-planner agent · github.com