Skills

Skill 62 of 200

Breakdown Epic Arch

Prompt for creating the high-level technical architecture for an Epic, based on a Product Requirements Document.

2 minutes · 359 words · 12 sections

Install

$ npx skills add github/awesome-copilot --skill breakdown-epic-arch

$ npx skills add github/awesome-copilot

» /plugin marketplace add github/awesome-copilot

The first command installs just this skill, by the name in its SKILL.md; the second installs the whole repository.

Epic Architecture Specification Prompt

Goal

Act as a Senior Software Architect. Your task is to take an Epic PRD and create a high-level technical architecture specification. This document will guide the development of the epic, outlining the major components, features, and technical enablers required.

Context Considerations

The Epic PRD from the Product Manager.
Domain-driven architecture pattern for modular, scalable applications.
Self-hosted and SaaS deployment requirements.
Docker containerization for all services.
TypeScript/Next.js stack with App Router.
Turborepo monorepo patterns.
tRPC for type-safe APIs.
Stack Auth for authentication.

Note: Do NOT write code in output unless it’s pseudocode for technical situations.

Output Format

The output should be a complete Epic Architecture Specification in Markdown format, saved to /docs/ways-of-work/plan/{epic-name}/arch.md.

Specification Structure

1. Epic Architecture Overview

A brief summary of the technical approach for the epic.

2. System Architecture Diagram

Create a comprehensive Mermaid diagram that illustrates the complete system architecture for this epic. The diagram should include:

User Layer: Show how different user types (web browsers, mobile apps, admin interfaces) interact with the system
Application Layer: Depict load balancers, application instances, and authentication services (Stack Auth)
Service Layer: Include tRPC APIs, background services, workflow engines (n8n), and any epic-specific services
Data Layer: Show databases (PostgreSQL), vector databases (Qdrant), caching layers (Redis), and external API integrations
Infrastructure Layer: Represent Docker containerization and deployment architecture

Use clear subgraphs to organize these layers, apply consistent color coding for different component types, and show the data flow between components. Include both synchronous request paths and asynchronous processing flows where relevant to the epic.

3. High-Level Features & Technical Enablers

A list of the high-level features to be built.
A list of technical enablers (e.g., new services, libraries, infrastructure) required to support the features.

4. Technology Stack

A list of the key technologies, frameworks, and libraries to be used.

5. Technical Value

Estimate the technical value (e.g., High, Medium, Low) with a brief justification.

6. T-Shirt Size Estimate

Provide a high-level t-shirt size estimate for the epic (e.g., S, M, L, XL).

Context Template

Epic PRD: [The content of the Epic PRD markdown file]

Colophon for this issue

Colophon

How this issue was made

Source

github.com/github/awesome-copilot, branch main, last pushed 24 September 2026.

Licence

MIT — the text of every skill is reproduced unmodified, frontmatter included, under the upstream licence.

Discovery

200 skills found by walking the repository tree for SKILL.md, not by matching a directory convention. 2 distinct layouts observed: .github/skills/*/SKILL.md, skills/*/SKILL.md.

Authorship

3 of 200 skills are installed into the repository rather than published from it. They are shelved in the closing “Credited skills” part and remain the work of their own authors. A skill counts as credited when its only copy lives under one agent’s dot directory; visible directories, per-agent mirror sets, and skills installable from this repository on skills.sh all count as published.

Issue colours

Resolved from a curated brand profile — hue 295°, chroma 0.190. Two accent tones are generated per issue and each is proven against its own ground before it ships: a single accent that passes AA on both light and dark paper is arithmetically impossible.

Heading repairs

1 repair applied to this skill so the document has one h1 and no skipped levels:

Shifted “12 headings” from h1 to h2 so the skill title is the only h1.

Spec compliance

Every skill satisfies the Agent Skills specification’s frontmatter rules.

Images

Images inside a skill come from the upstream repository. Where the author gave no alternative text we mark the image decorative rather than inventing a description — a plausible caption we made up is worse than none for the reader who depends on it.

Marketplace

A plugin manifest is published at .github/plugin/marketplace.json by GitHub, declaring 162 plugins. It is read for editorial metadata only — never as the skill index, which is always the repository tree.

Signal

Install counts come from skills.sh. They measure downloads, not quality, and an unranked repository is not an unread one.

Agent surfaces

The whole issue is available as one markdown document at /github/awesome-copilot.md, and each skill at its own .md URL.

Publication

Set by Skills Docs from the source repository. Body text is Literata at the reader’s chosen size and measure; code is Geist Mono. Nothing on this page was written by us except this paragraph.

Epic Architecture Specification Prompt

Goal

Context Considerations

The Epic PRD from the Product Manager.
Domain-driven architecture pattern for modular, scalable applications.
Self-hosted and SaaS deployment requirements.
Docker containerization for all services.
TypeScript/Next.js stack with App Router.
Turborepo monorepo patterns.
tRPC for type-safe APIs.
Stack Auth for authentication.

Note: Do NOT write code in output unless it’s pseudocode for technical situations.

A brief summary of the technical approach for the epic.

2. System Architecture Diagram

Create a comprehensive Mermaid diagram that illustrates the complete system architecture for this epic. The diagram should include:

User Layer: Show how different user types (web browsers, mobile apps, admin interfaces) interact with the system
Application Layer: Depict load balancers, application instances, and authentication services (Stack Auth)
Service Layer: Include tRPC APIs, background services, workflow engines (n8n), and any epic-specific services
Data Layer: Show databases (PostgreSQL), vector databases (Qdrant), caching layers (Redis), and external API integrations
Infrastructure Layer: Represent Docker containerization and deployment architecture

3. High-Level Features & Technical Enablers

A list of the high-level features to be built.
A list of technical enablers (e.g., new services, libraries, infrastructure) required to support the features.

4. Technology Stack

A list of the key technologies, frameworks, and libraries to be used.

5. Technical Value

Estimate the technical value (e.g., High, Medium, Low) with a brief justification.

6. T-Shirt Size Estimate

Provide a high-level t-shirt size estimate for the epic (e.g., S, M, L, XL).

Context Template

Epic PRD: [The content of the Epic PRD markdown file]