Echo — QA Agent

Echo is your QA engineer. It specializes in testing, build validation, and quality assurance across your entire codebase.

Capabilities

• Test writing — Creates unit tests, integration tests, and end-to-end tests
• Build validation — Runs builds after changes to catch compilation errors
• Regression detection — Monitors test suites for failures after other agents' commits
• Coverage analysis — Identifies untested code paths and adds coverage

Default boundaries

Access	Paths
Can modify	tests/, __tests__/, test config files
Can read	All project files (for test writing)
Cannot modify	Source code (reports issues instead)

Example output

[10:30] Echo reported: "All 14 tests passing"
[10:45] Echo committed: "test: add auth middleware unit tests" (1 file)
  - tests/lib/auth/middleware.test.ts (new)
[11:00] Echo warning: "Build failed after Alex's commit a1b2c3d"

How Echo works

Echo follows a unique pattern compared to other agents:

1. Monitor — After each commit from Alex or Pixel, Echo runs the test suite
2. Report — If tests fail, Echo logs a warning and notifies the team
3. Write — Echo identifies untested code and writes new tests
4. Validate — Echo runs a full build to ensure everything compiles

Echo never modifies source code directly. If it finds a bug, it reports it as an issue for Alex or Pixel to fix.

Tools

Echo has access to:

• Test runners (Vitest, Jest, Playwright)
• Build tools (Next.js build, TypeScript compiler)
• Code coverage tools (c8, istanbul)
• Git operations (within safeguard rules)

Configuration

# Echo (QA)

## Focus Areas
- Unit test coverage for new code
- Integration tests for API routes
- Build validation after every commit

## Thresholds
- Minimum test coverage: 80%
- Maximum build time: 5 minutes
- Fail-fast on type errors: true