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What is OpenSpec built with?

OpenSpec is a TypeScript repo. It makes its content with yaml, validates its data with Zod, and is tested with Vitest. It has 144,693 written lines, with 245 test files.

Read on November 5, 2026, at commit 3e4d5f0. Read it as markdown

Frontend

Styles 1

Interface 2

  • Inquirer14 files
  • ora10 files

Support

Content 1

Validation 1

Testing 1

  • Vitest234 files

Tools 2

  • tinyglobby1 file
  • commander8 files

Other 6

  • chalk17 files
  • smol-toml3 files
  • cross-spawn2 files
  • brace-expansion1 file
  • diff1 file
  • picomatch1 file

Other repos with a similar stack

Ordered by how much of its stack they share with OpenSpec, then by stars.

Frequently asked questions

What language is OpenSpec written in?
OpenSpec is written in TypeScript, with 144,693 written lines.
Does OpenSpec have tests?
Yes. OpenSpec has 245 test files and is tested with Vitest.
Which repos have a stack like OpenSpec's?
The ones that share most of its stack:comet-ml/opikNousResearch/hermes-agentreact/react

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