go-cover

name: go-cover
description: Generate Go test coverage report with package breakdown.
argument-hint: [package-pattern]
allowed-tools: Bash
model: haiku

Instructions

1. Validate: Check go.mod exists in cwd or parent dirs

2. Execute:

3. Pattern: <ARG> or default ./...
4. --html: Generate coverage.html and report path

5. Run: go test -coverprofile=coverage.out -covermode=atomic <pattern>

6. Parse: Extract per-package coverage from coverage.out

7. Skip mode/total lines
8. Group by package path

9. Calculate percentage: (covered statements / total statements) × 100

10. Format:
    ```markdown
    ## COVERAGE REPORT

Overall: 83.4% | Target: 80% | Status: PASS
```

1. Report:
2. Standard: Markdown table with overall status

3. HTML mode: "Coverage report: coverage.html"

4. Edge cases:

5. No tests: "No test files found in <pattern>"
6. Build failure: Report compilation errors (first 5 lines)
7. Target: Env GO_COVER_TARGET or default 80%