Source: https://seerepo.com/compare/anomalyco/opencode/vs/coleam00/Archon
Markdown source: https://seerepo.com/compare/anomalyco/opencode/vs/coleam00/Archon.md
Description: opencode and Archon share 9 technologies: Vite, Anthropic, GitHub, Hono, @clack/prompts, Tailwind CSS, @agentclientprotocol/sdk, Zod, and yaml. Both are written in TypeScript.

# opencode vs Archon

opencode and Archon share 9 technologies: Vite, Anthropic, GitHub, Hono, @clack/prompts, Tailwind CSS, @agentclientprotocol/sdk, Zod, and yaml. Both are written in TypeScript.

- [anomalyco/opencode](https://seerepo.com/r/anomalyco/opencode): The open source coding agent.
- [coleam00/Archon](https://seerepo.com/r/coleam00/Archon): The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.

## What they share and what sets them apart

- In common: Vite, Anthropic, GitHub, Hono, @clack/prompts, Tailwind CSS, @agentclientprotocol/sdk, Zod, yaml
- Only in opencode: Solid, @solidjs/router, Sentry, MCP, Electron, @tailwindcss/vite, Drizzle, jose, htmlparser2, gray-matter, @standard-schema/spec, electron-log, micromark, micromark-extension-gfm, pele, dompurify, marked, katex
- Only in Archon: Postgres, PostHog, React, React Router, bcryptjs, pino, pino-pretty, earendil-works, @opencode-ai/sdk, Ajv, Better Auth, xyflow, @dagrejs/dagre, Lucide, react-markdown, rehype-highlight, remark-breaks, remark-gfm

## Side by side

| | opencode | Archon |
|---|---|---|
| Size | 1,028,811 lines written, 3,839 code files | 666,863 lines written, 1,890 code files |
| Who writes it | 0.3% of its commits signed by AI. With Claude Code, GitHub Copilot, Cursor, and Jules | 12.7% of its commits signed by AI. With Claude Code, GitHub Copilot, CodeRabbit, and Gemini CLI |
| Activity | Last push November 4, 2026, 21,835 commits, 224,454 stars | Last push November 4, 2026, 3,643 commits, 23,825 stars |
| Tests | 1,608 test files. 35.1% of its code files have a test that imports them | 1,069 test files. 42.7% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, opencode or Archon?

opencode, with 1,028,811 lines written; Archon has 666,863.

The proof: [anomalyco/opencode's code at commit ffe6fed](https://github.com/anomalyco/opencode/tree/ffe6fed58334d921f64a86a8d86128bff5a4b566)

### Which has more GitHub stars, opencode or Archon?

opencode, with 224,454 stars; Archon has 23,825.

The proof: [anomalyco/opencode on GitHub](https://github.com/anomalyco/opencode)

### Which has more tests, opencode or Archon?

opencode, with 1,608 test files; Archon has 1,069.

The proof: [anomalyco/opencode's code at commit ffe6fed](https://github.com/anomalyco/opencode/tree/ffe6fed58334d921f64a86a8d86128bff5a4b566)

### Which was updated more recently, opencode or Archon?

Both got their last push on November 4, 2026.

The proof: [coleam00/Archon's commits on GitHub](https://github.com/coleam00/Archon/commits)

### Which has more commits signed by AI, opencode or Archon?

Archon: an AI signed 12.7% of its commits, with Claude Code, GitHub Copilot, CodeRabbit, and Gemini CLI; in opencode, 0.3%.

The proof: [the commits each tool signed in coleam00/Archon](https://seerepo.com/r/coleam00/Archon/ai)

## Sources

- anomalyco/opencode: Read on November 4, 2026, at commit ffe6fed (https://github.com/anomalyco/opencode/tree/ffe6fed58334d921f64a86a8d86128bff5a4b566)
- coleam00/Archon: Read on November 4, 2026, at commit 0d8de49 (https://github.com/coleam00/Archon/tree/0d8de493fb016ca7a63529f3abc1ab08ac3e7a16)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.