cli/.core/task/issue/258/spec.md

Issue 258: Smart Test Detection

Original Issue

https://github.com/host-uk/core/issues/258

Summary

Make core test smart - detect changed files and run only relevant tests.

Commands

core test                    # Run tests for changed files only
core test --all              # Run all tests  
core test --filter UserTest  # Run specific test
core test --coverage         # With coverage report

Acceptance Criteria

• Detect changed .go files via git diff --name-only
• Map source files to test files (foo.go → foo_test.go)
• Run only relevant tests via go test
• Support --all flag to run all tests
• Support --filter flag for pattern matching
• Support --coverage flag for coverage reports

Technical Context

• Go CLI using Cobra
• Commands in cmd/core/cmd/
• Follow existing patterns in dev_*.go files