A comprehensive 14-phase deep dive into GitHub's copilot-sdk — the polyglot SDK powering Copilot integrations across TypeScript, Python, Go, and C#.
An interactive documentation site that methodically analyzes the architecture, patterns, data flows, and internals of GitHub's copilot-sdk. Built as a static HTML/CSS/JS site with 87 Mermaid diagrams, syntax-highlighted code, and a dark-themed UI.
This is not official GitHub documentation. It's an independent architectural analysis created to help developers understand how the SDK works under the hood.
| # | Phase | What You'll Learn |
|---|---|---|
| 00 | Overview | Architecture at a glance, navigation guide |
| 01 | Discovery | Project identity, repo signals, key statistics |
| 02 | Structure | Directory layout, module dependencies, layer stack |
| 03 | Tech Stack | Languages, build tools, frameworks, IPC architecture |
| 04 | Entry Points | CLI bootstrap, startup sequences, cross-SDK API table |
| 05 | Architecture | 7 design patterns, state machines, event dispatch |
| 06 | Data Flow | JSON-RPC flows, sessions, events, tool execution |
| 07 | API Surface | Public API, method signatures, extension points |
| 08 | Conventions | Naming, error handling, async patterns, code style |
| 09 | Testing | Test harness, snapshot system, E2E architecture |
| 10 | Build & Deploy | CI/CD pipelines, publishing, CLI bundling |
| 11 | Dependencies | Runtime + dev dependency analysis per SDK |
| 12 | Security | Trust boundaries, auth flow, attack surface |
| 13 | Contribution | Code generation pipeline, dev workflows |
- 87 Mermaid.js diagrams — flowcharts, sequence diagrams, and state machines that visualize architecture, data flows, and patterns
- Syntax-highlighted code — TypeScript, Python, Go, and C# examples with Highlight.js
- Dark theme — designed for extended reading with WCAG AA contrast compliance
- Zero build step — pure static HTML/CSS/JS, open
index.htmlin any browser - Responsive — sidebar navigation collapses on mobile
- Sequential navigation — prev/next links across all 14 pages
- Reading time estimates — shown on every page
| Layer | Choice |
|---|---|
| Diagrams | Mermaid.js v10 (CDN) |
| Syntax Highlighting | Highlight.js v11.9 (CDN) |
| Fonts | JetBrains Mono + IBM Plex Sans (Google Fonts) |
| Hosting | Cloudflare Pages |
| Build | None — static files only |
git clone https://github.com/SufficientDaikon/copilot-sdk-dissection.git
cd copilot-sdk-dissection
# Open in browser — no build needed
open index.htmlOr use any static server:
npx serve .The site uses a consistent dark theme based on these tokens:
| Token | Value | Usage |
|---|---|---|
--color-background |
#0F172A |
Page background |
--color-surface |
#1E293B |
Cards, code blocks |
--color-cta |
#22C55E |
Links, accents |
--color-text |
#F8FAFC |
Primary text |
--color-text-dim |
#7C8BA0 |
Secondary text (WCAG AA) |
Found an inaccuracy or want to improve a diagram? PRs welcome.
This is an independent analysis of a public repository. The copilot-sdk itself is owned by GitHub.
Built with Claude Code