Trigger
- Keywords: check coverage, test coverage, coverage analysis, coverage gaps, check-coverage
When NOT to Use
- Test sufficiency review via Codex (use
/codex-test-review) - Generating tests (use
/codex-test-gen) - Running tests (use
/verify)
Parent Skill Reference
See @skills/test-review/SKILL.md for Codex-based test review workflow.
Agent Dispatch
Agent({
description: "Assess three-layer test coverage and identify gaps",
subagent_type: "coverage-analyst",
prompt: `Assess Unit / Integration / E2E test coverage for the feature docs at: $ARGUMENTS
Follow the steps defined in this skill.`
})
Task
Step 1: Read Feature Documentation
Read specified feature docs. Extract:
- Feature name and objectives
- Involved Service / Provider / Entity
- Core flows and boundary conditions
Step 2: Identify Related Source Code
Search related source code based on feature documentation. Build source code inventory.
Step 3: Map Test Files
Check whether each source file has corresponding tests (unit, integration, e2e).
Step 4: Analyze Coverage Gaps
For each source file:
- Read source: Identify public methods, important branches, error handling
- Read tests: Identify covered cases
- Compare gaps: missing methods, uncovered branches, untested error scenarios
Step 5: Classify and Recommend
| Severity | Description |
|---|---|
| 🔴 Critical | Core logic, data writes, amount calculations |
| 🟠 Major | Important branches, error handling |
| 🟡 Minor | Edge cases, utility functions |
| ⚪ Nice-to-have | Logging, formatting |
Output
# Test Coverage Analysis Report
## Feature Overview
- Feature name: <from documentation>
- Documentation path: $ARGUMENTS
- Related modules: <list>
## Current Coverage
| Module | Source Path | Test Path | Coverage Status |
|--------|------------|-----------|----------------|
## Coverage Gaps
### 🔴 Critical
### 🟠 Major
### 🟡 Minor
## Recommended New Tests
| Priority | Test Type | Test Case | Target File |
|----------|-----------|-----------|-------------|
## Coverage Summary
| Metric | Status |
|--------|--------|
| Feature coverage | X/Y (Z%) |
| Happy path | ✅/❌ |
| Error path | ✅/❌ |
| Edge cases | ✅/❌ |