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.github/skills/test-backend-coverage.SKILL.md
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.github/skills/test-backend-coverage.SKILL.md
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# agentskills.io specification v1.0
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name: "test-backend-coverage"
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version: "1.0.0"
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description: "Run Go backend tests with coverage analysis and threshold validation (minimum 85%)"
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author: "Charon Project"
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license: "MIT"
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tags:
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- "testing"
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- "coverage"
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- "go"
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- "backend"
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- "validation"
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compatibility:
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os:
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- "linux"
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- "darwin"
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shells:
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- "bash"
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requirements:
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- name: "go"
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version: ">=1.23"
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optional: false
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- name: "python3"
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version: ">=3.8"
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optional: false
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environment_variables:
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- name: "CHARON_MIN_COVERAGE"
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description: "Minimum coverage percentage required (overrides default)"
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default: "85"
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required: false
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- name: "CPM_MIN_COVERAGE"
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description: "Alternative name for minimum coverage threshold (legacy)"
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default: "85"
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required: false
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- name: "PERF_MAX_MS_GETSTATUS_P95"
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description: "Maximum P95 latency for GetStatus endpoint (ms)"
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default: "25ms"
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required: false
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- name: "PERF_MAX_MS_GETSTATUS_P95_PARALLEL"
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description: "Maximum P95 latency for parallel GetStatus calls (ms)"
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default: "50ms"
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required: false
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- name: "PERF_MAX_MS_LISTDECISIONS_P95"
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description: "Maximum P95 latency for ListDecisions endpoint (ms)"
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default: "75ms"
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required: false
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parameters:
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- name: "verbose"
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type: "boolean"
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description: "Enable verbose test output"
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default: "false"
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required: false
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outputs:
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- name: "coverage.txt"
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type: "file"
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description: "Go coverage profile in text format"
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path: "backend/coverage.txt"
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- name: "coverage_summary"
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type: "stdout"
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description: "Summary of coverage statistics and validation result"
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metadata:
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category: "test"
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subcategory: "coverage"
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execution_time: "medium"
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risk_level: "low"
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ci_cd_safe: true
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requires_network: false
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idempotent: true
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---
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# Test Backend Coverage
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## Overview
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Executes the Go backend test suite with race detection enabled, generates a coverage profile, filters excluded packages, and validates that the total coverage meets or exceeds the configured threshold (default: 85%).
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This skill is designed for continuous integration and pre-commit hooks to ensure code quality standards are maintained.
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## Prerequisites
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- Go 1.23 or higher installed and in PATH
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- Python 3.8 or higher installed and in PATH
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- Backend dependencies installed (`cd backend && go mod download`)
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- Write permissions in `backend/` directory (for coverage.txt)
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## Usage
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### Basic Usage
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Run with default settings (85% minimum coverage):
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```bash
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cd /path/to/charon
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.github/skills/scripts/skill-runner.sh test-backend-coverage
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```
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### Custom Coverage Threshold
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Set a custom minimum coverage percentage:
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```bash
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export CHARON_MIN_COVERAGE=90
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.github/skills/scripts/skill-runner.sh test-backend-coverage
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```
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### CI/CD Integration
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For use in GitHub Actions or other CI/CD pipelines:
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```yaml
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- name: Run Backend Tests with Coverage
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run: .github/skills/scripts/skill-runner.sh test-backend-coverage
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env:
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CHARON_MIN_COVERAGE: 85
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```
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## Parameters
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| Parameter | Type | Required | Default | Description |
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|-----------|------|----------|---------|-------------|
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| verbose | boolean | No | false | Enable verbose test output (-v flag) |
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## Environment Variables
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| Variable | Required | Default | Description |
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|----------|----------|---------|-------------|
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| CHARON_MIN_COVERAGE | No | 85 | Minimum coverage percentage required for success |
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| CPM_MIN_COVERAGE | No | 85 | Legacy name for minimum coverage (fallback) |
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| PERF_MAX_MS_GETSTATUS_P95 | No | 25ms | Max P95 latency for GetStatus endpoint |
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| PERF_MAX_MS_GETSTATUS_P95_PARALLEL | No | 50ms | Max P95 latency for parallel GetStatus |
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| PERF_MAX_MS_LISTDECISIONS_P95 | No | 75ms | Max P95 latency for ListDecisions endpoint |
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## Outputs
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### Success Exit Code
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- **0**: All tests passed and coverage meets threshold
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### Error Exit Codes
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- **1**: Coverage below threshold or coverage file generation failed
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- **Non-zero**: Tests failed or other error occurred
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### Output Files
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- **backend/coverage.txt**: Go coverage profile (text format)
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### Console Output
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Example output:
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```
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Filtering excluded packages from coverage report...
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Coverage filtering complete
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total: (statements) 87.4%
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Computed coverage: 87.4% (minimum required 85%)
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Coverage requirement met
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```
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## Examples
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### Example 1: Basic Execution
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```bash
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.github/skills/scripts/skill-runner.sh test-backend-coverage
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```
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### Example 2: Higher Coverage Threshold
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```bash
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export CHARON_MIN_COVERAGE=90
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.github/skills/scripts/skill-runner.sh test-backend-coverage
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```
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## Excluded Packages
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The following packages are excluded from coverage analysis:
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- `github.com/Wikid82/charon/backend/cmd/api` - API server entrypoint
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- `github.com/Wikid82/charon/backend/cmd/seed` - Database seeding tool
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- `github.com/Wikid82/charon/backend/internal/logger` - Logging infrastructure
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- `github.com/Wikid82/charon/backend/internal/metrics` - Metrics infrastructure
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- `github.com/Wikid82/charon/backend/internal/trace` - Tracing infrastructure
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- `github.com/Wikid82/charon/backend/integration` - Integration test utilities
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## Error Handling
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### Common Errors
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#### Error: coverage file not generated by go test
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**Solution**: Review test output for failures; fix failing tests
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#### Error: go tool cover failed or timed out
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**Solution**: Clear Go cache and re-run tests
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#### Error: Coverage X% is below required Y%
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**Solution**: Add tests for uncovered code paths or adjust threshold
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## Related Skills
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- test-backend-unit - Fast unit tests without coverage
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- security-check-govulncheck - Go vulnerability scanning
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- utility-cache-clear-go - Clear Go build cache
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## Notes
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- **Race Detection**: Always runs with `-race` flag enabled (adds ~30% overhead)
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- **Coverage Filtering**: Excluded packages are defined in the script itself
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- **Python Dependency**: Uses Python for decimal-precision coverage comparison
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- **Timeout Protection**: Coverage generation has a 60-second timeout
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- **Idempotency**: Safe to run multiple times; cleans up old coverage files
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---
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**Last Updated**: 2025-12-20
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**Maintained by**: Charon Project Team
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**Source**: `scripts/go-test-coverage.sh`
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