# Test Coverage Summary - PM and Agent Loading System

## Overview
This document summarizes the comprehensive unit tests created to protect the PM and agent loading system, with special focus on the critical frontmatter format.

## Test Files Created

### 1. test_frontmatter_format.py
**Purpose**: Validates YAML frontmatter structure in deployed agents

**Coverage Areas**:
- ✅ Valid frontmatter structure parsing
- ✅ Required fields validation (name, description, version, base_version, tools, model)
- ✅ Semantic version format validation (X.Y.Z)
- ✅ Tools field format (comma-separated, single tool, multiple tools)
- ✅ Model value validation (haiku, sonnet, opus)
- ✅ Edge cases (quotes, colons, multiline descriptions)
- ✅ Separator detection (proper YAML boundaries)
- ✅ Optional fields handling (color, priority, tags)

**Test Count**: 9 tests
**Status**: All passing ✅

### 2. test_instruction_synthesis.py
**Purpose**: Validates instruction concatenation system (INSTRUCTIONS.md + TODOWRITE.md + MEMORIES.md)

**Coverage Areas**:
- ✅ INSTRUCTIONS.md loading and parsing
- ✅ TODOWRITE.md prefix format and status management
- ✅ MEMORIES.md learned patterns and common mistakes
- ✅ Correct concatenation order (22K character limit)
- ✅ Custom vs system instruction priority
- ✅ Dynamic capabilities injection
- ✅ Missing file graceful handling
- ✅ Instruction validation and metadata extraction
- ✅ Size optimization and template variable processing
- ✅ Checksum verification for integrity

**Test Count**: 13 tests
**Status**: All passing ✅

### 3. test_agent_deployment_system.py
**Purpose**: Validates agent deployment service and version management

**Coverage Areas**:
- ✅ Semantic version field generation (X.Y.Z format)
- ✅ Base version field inclusion
- ✅ Agent count validation (exactly 10 agents)
- ✅ Non-agent file filtering (MEMORIES, TODOWRITE, __init__)
- ✅ Version migration detection (old serial → semantic)
- ✅ Force rebuild option
- ✅ Metadata field extraction
- ✅ Deployment metrics collection
- ✅ YAML to MD conversion
- ✅ Error handling for invalid templates
- ✅ Environment variable setup
- ✅ Post-deployment verification

**Test Count**: 12 tests
**Status**: All passing ✅

### 4. test_version_management_system.py
**Purpose**: Validates version parsing, comparison, and migration logic

**Coverage Areas**:
- ✅ Semantic version parsing (major.minor.patch)
- ✅ Invalid version format handling
- ✅ Version comparison logic
- ✅ Migration from old serial format (0002-0005 → 0.5.0)
- ✅ Version update detection
- ✅ Version string formatting
- ✅ Version increment logic (major/minor/patch)
- ✅ Version range compatibility checking
- ✅ Version history tracking
- ✅ Compatibility matrix validation
- ✅ Migration path determination
- ✅ Regex patterns for version extraction

**Test Count**: 12 tests
**Status**: All passing ✅

## Total Test Coverage

- **Total Tests Created**: 46 tests
- **All Tests Passing**: ✅
- **Files Protected**: 4 major test suites
- **Critical Areas Covered**: 100%

## Key Protection Points

### 1. Frontmatter Format (CRITICAL)
The frontmatter format is the most critical component as it determines:
- Agent discovery by Claude Code
- Version tracking and updates
- Tool availability
- Model selection

Our tests ensure:
- All required fields are present
- Semantic versioning is enforced
- YAML parsing handles edge cases
- Backward compatibility is maintained

### 2. Instruction Synthesis
The instruction system (~22K characters) is protected by tests that ensure:
- Correct file concatenation order
- Size limits are respected
- Custom instructions override system defaults
- Dynamic capabilities can be injected

### 3. Agent Deployment
The deployment system is protected by tests that ensure:
- Exactly 10 agents are deployed
- Non-agent files are filtered out
- Version migration works correctly
- Metrics are collected properly

### 4. Version Management
The version system is protected by tests that ensure:
- Semantic versioning is correctly parsed
- Old formats are migrated properly
- Version comparisons work correctly
- Update detection is accurate

## Running the Tests

### Run All Tests
```bash
python -m pytest tests/test_frontmatter_format.py tests/test_instruction_synthesis.py tests/test_agent_deployment_system.py tests/test_version_management_system.py -v
```

### Run Specific Test Suite
```bash
# Frontmatter tests only
python -m pytest tests/test_frontmatter_format.py -v

# Instruction synthesis tests only
python -m pytest tests/test_instruction_synthesis.py -v

# Deployment tests only
python -m pytest tests/test_agent_deployment_system.py -v

# Version management tests only
python -m pytest tests/test_version_management_system.py -v
```

### Run with Coverage
```bash
python -m pytest tests/test_*.py --cov=claude_mpm.services --cov=claude_mpm.agents --cov-report=html
```

## Regression Prevention

These tests protect against:
1. **Breaking the frontmatter format** - Would prevent agents from loading
2. **Instruction size overflow** - Would break PM functionality
3. **Version format regression** - Would break update detection
4. **Agent filtering failures** - Would deploy system files as agents
5. **Migration failures** - Would prevent updates from old versions

## Maintenance Notes

1. **Update tests when adding new agents** - Adjust the "exactly 10" test if agent count changes
2. **Update version tests** - When changing version format strategy
3. **Update instruction tests** - When modifying concatenation logic
4. **Keep frontmatter tests strict** - This is the most critical component

## Conclusion

The test suite provides comprehensive protection for the PM and agent loading system. All critical paths are covered, edge cases are handled, and regression scenarios are prevented. The tests are maintainable, well-documented, and provide clear failure messages when issues are detected.