Open source repo
What's inside bytedance/
bytedance/UI-TARS-desktop is a TypeScript repo with 194,656 lines written in 1,140 files. UI-TARS-desktop is built with Express and uses MongoDB, OpenAI, MCP, and 2 more. AI signed 0.1% of the 1,113 commits of UI-TARS-desktop.
Its description on GitHub: “The Open-Source Multimodal AI Agent Stack: Connecting Cutting-Edge AI Models and Agent Infra”
TypeScriptApache-2.039,487
Read on October 31, 2026, at commit 3ac2cb8.
What the card proved: what it’s built with on the left, what it uses on the right.
See each one with its proofIts folders
In figures
- lines written
- 194,656
- The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- files
- 1,140
- The product’s, not counting tests.
- test files
- 161
- The files that test the code.
SeeRepo read its code facts-only: no AI, and none of its code is kept.
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