Compare
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.
What they share and what sets them apart
anomalyco
opencode
The open source coding agent.
TypeScript224.5kRead on November 4, 2026, at commit ffe6fedWhat is opencode built with?coleam00
Archon
The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.
TypeScript23.8kRead on November 4, 2026, at commit 0d8de49What is Archon built with?In common
Only in opencode
Only in Archon
Side by side
opencodeArchon
SizeLines written by people and agents, without generated ones; code files, without tests.
opencode1,028,811 lines written3,839 code files
Archon666,863 lines written1,890 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
opencode0.3% of its commits signed by AIWith Claude Code, GitHub Copilot, Cursor, and Jules
Archon12.7% of its commits signed by AIWith Claude Code, GitHub Copilot, CodeRabbit, and Gemini CLI
ActivityFrom GitHub and its history, on the day SeeRepo read it.
opencodeLast push November 4, 202621,835 commits224,454 stars
ArchonLast push November 4, 20263,643 commits23,825 stars
TestsThe files that test the code, and the share of code files a test imports.
opencode1,608 test files35.1% of its code files have a test that imports them
Archon1,069 test files42.7% of its code files have a test that imports them
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
Which has more GitHub stars, opencode or Archon?
opencode, with 224,454 stars; Archon has 23,825.
The proof: anomalyco/opencode on GitHub
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
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
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%.
What is your repo built with?
Paste your public repo and see it drawn.
Free, no account.