Default Vitest floods AI tools with progress bars, timings, module graphs, and decorative noise. This reporter emits only what an AI needs to act: a pass count when green, and a precise failure block per broken test when not.

🤖 Works with

Claude Code, Cursor, GitHub Copilot, Cline, Aider — any AI coding tool that reads terminal output.

📦 Install

npm install -D vitest-ai-reporter
# or
pnpm add -D vitest-ai-reporter

🚀 Usage

// vitest.config.ts
import { defineConfig } from 'vitest/config'
import AIReporter from 'vitest-ai-reporter'

export default defineConfig({
  test: {
    reporters: [new AIReporter()],
  },
})

🔍 Output

All tests pass — 1 line:

PASS (3) FAIL (0)

Tests fail — one compact block per failure:

PASS (2) FAIL (2)

FAIL  example.test.ts:13:19
      math > fails on purpose
      expected 2 to be 3 // Object.is equality
      13|     expect(1 + 1).toBe(3)
                            ^

FAIL  example.test.ts:17:19
      math > multiplies two numbers
      expected 12 to be 999 // Object.is equality
      17|     expect(3 * 4).toBe(999)
                            ^

Each failure block contains exactly what the AI needs:

• 📍 File, line, and column — no hunting
• 🧭 Full test path — no ambiguity
• ❌ Error message — what was expected
• 👇 The exact failing line with a ^ pointer — no stack trace noise

📄 License

MIT