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---
description: Sprint Series: Achieving 85%+ Test Coverage: **Version:** 1.0 **Created:** January 16, 2026 **Owner:** Engineering Team **Status:** Planning → Execution Ready -
---

Sprint Series: Achieving 85%+ Test Coverage

Version: 1.0 Created: January 16, 2026 Owner: Engineering Team Status: Planning → Execution Ready

Executive Summary

Current State: 54.67% coverage (6,615 tests passing) Target: 85%+ coverage (production readiness threshold) Gap: +30.33 percentage points needed Timeline: 3 sprints × 2 weeks = 6 weeks total Approach: Systematic module-by-module coverage improvement with OOP refactoring

Prerequisites Completed:

✅ Phase 1: Architecture validation and gap analysis
✅ Phase 2: Architectural test suite created (~200 tests)
✅ LongTermMemory class implemented (P0 gap resolved)
✅ Critical gaps documented and prioritized

Coverage Breakdown Analysis

Current Coverage by Module

Module	Current %	Target %	Gap	Priority	Lines
orchestration/	22.53%	90%	+67.47	P0	1,234
memory/	18-27%	90%	+63-72	P0	892
models/	21-73%	95%	+22-74	P1	1,523
workflows/	45-98%	95%	0-50	P1	2,341
security/	12%	90%	+78	P0	456
telemetry/	67%	85%	+18	P2	678
project_index/	34%	85%	+51	P2	789
cli.py	56%	80%	+24	P2	234

Total Lines to Cover: ~4,200 additional lines across 8 major modules

Sprint Series Overview

Sprint 1: OOP Foundation & Critical Gaps (Weeks 1-2)

Goal: Complete OOP refactoring, enable architectural tests Target: 54.67% → 70% (+15.33 points)

Sprint 2: Core System Coverage (Weeks 3-4)

Goal: Test orchestration, memory, and models thoroughly Target: 70% → 80% (+10 points)

Sprint 3: Comprehensive Coverage & Edge Cases (Weeks 5-6)

Goal: Cover workflows, security, remaining modules Target: 80% → 85%+ (+5+ points)

Sprint 1: OOP Foundation & Critical Gaps (Weeks 1-2)

Objectives

Complete OOP refactoring (ModelRegistry, FallbackPolicy)
Enable all 200 architectural tests
Achieve baseline coverage for critical modules
Fix test API mismatches

Week 1: ModelRegistry & Routing

Day 1-2: Create ModelRegistry Class (P1)

File: src/empathy_os/models/registry.py

class ModelRegistry:
    """OOP interface for model tier management."""

    def __init__(self, registry_dict: dict | None = None):
        self._registry = registry_dict or MODEL_REGISTRY
        self._by_tier_cache: dict = {}
        self._build_tier_cache()

    def get_model(self, provider: str, tier: str) -> ModelInfo | None:
        """Get model by provider and tier."""
        return self._registry.get(provider, {}).get(tier)

    def get_model_by_id(self, model_id: str) -> ModelInfo | None:
        """Get model by unique ID (e.g., 'gpt-4o')."""
        for provider_models in self._registry.values():
            for model in provider_models.values():
                if model.model_id == model_id:
                    return model
        return None

    def get_models_by_tier(self, tier: str) -> list[ModelInfo]:
        """Get all models in a tier across providers."""
        return self._by_tier_cache.get(tier, [])

    def list_providers(self) -> list[str]:
        """List all registered providers."""
        return list(self._registry.keys())

    def list_tiers(self) -> list[str]:
        """List all available tiers."""
        return ["cheap", "capable", "premium"]

# Backward compatibility
_default_registry = ModelRegistry()
def get_model(provider: str, tier: str) -> ModelInfo | None:
    return _default_registry.get_model(provider, tier)

Tests to Enable: 25 ModelRegistry tests in test_execution_and_fallback_architecture.py

Coverage Impact: +5% (models/registry.py: 21% → 80%)

Day 3-4: Create FallbackPolicy Class (P1)

File: src/empathy_os/models/fallback.py (new)

class FallbackTier(Enum):
    """Fallback tier progression."""
    CHEAP = "cheap"
    CAPABLE = "capable"
    PREMIUM = "premium"

class FallbackPolicy:
    """Manages fallback logic for failed LLM requests."""

    TIER_PROGRESSION = {
        "cheap": "capable",
        "capable": "premium",
        "premium": None  # No fallback from premium
    }

    def __init__(self, max_retries: int = 3):
        self.max_retries = max_retries
        self.fallback_count = 0

    def get_next_tier(self, current_tier: str) -> str | None:
        """Get next tier in fallback chain."""
        return self.TIER_PROGRESSION.get(current_tier)

    def prepare_fallback_request(
        self,
        original_request: dict,
        current_tier: str
    ) -> dict:
        """Prepare request for fallback tier."""
        next_tier = self.get_next_tier(current_tier)
        if not next_tier:
            raise ValueError("No fallback available from premium tier")

        return {
            **original_request,
            "tier": next_tier,
            "is_fallback": True,
            "fallback_from": current_tier,
            "attempt": self.fallback_count + 1
        }

    def should_fallback(self, error: Exception, tier: str) -> bool:
        """Determine if fallback should be attempted."""
        if self.fallback_count >= self.max_retries:
            return False
        if tier == "premium":
            return False  # Already at highest tier

        # Fallback for rate limits, timeouts, temporary errors
        fallback_errors = (TimeoutError, ConnectionError, ...)
        return isinstance(error, fallback_errors)

Tests to Enable: 30 FallbackPolicy tests

Coverage Impact: +3% (new module)

Day 5: Update UnifiedMemory Test Suite

File: tests/unit/memory/test_memory_architecture.py

Fix API mismatches:

# Old (idealized API):
memory = UnifiedMemory(use_mock_redis=True)

# New (actual API):
config = MemoryConfig(redis_mock=True)
memory = UnifiedMemory(user_id="test_user", config=config)

Tests to Enable: 40 memory architecture tests

Coverage Impact: +4% (memory/: 18-27% → 65%)

Week 2: Meta-Orchestrator & Integration Tests

Day 6-7: Extract Testable Methods (Gap 1.3)

File: src/empathy_os/orchestration/meta_orchestrator.py

Make key methods public for testing:

class MetaOrchestrator:
    # Public methods for testing
    def analyze_task(self, task: str, context: dict) -> TaskRequirements:
        """Public wrapper for task analysis (testable)."""
        return self._analyze_task(task, context)

    def create_execution_plan(
        self,
        requirements: TaskRequirements,
        agents: list[AgentTemplate],
        strategy: CompositionPattern
    ) -> ExecutionPlan:
        """Create execution plan from components (extracted for testing)."""
        return ExecutionPlan(
            agents=agents,
            strategy=strategy,
            quality_gates=requirements.quality_gates,
            estimated_cost=self._estimate_cost(agents),
            estimated_duration=self._estimate_duration(agents, strategy),
        )

    # Original method now uses extracted components
    def analyze_and_compose(self, task: str, context: dict) -> ExecutionPlan:
        requirements = self.analyze_task(task, context)
        agents = self._select_agents(requirements)
        strategy = self._choose_composition_pattern(requirements, agents)
        return self.create_execution_plan(requirements, agents, strategy)

Tests to Enable: 50 meta-orchestrator tests (currently skipped)

Coverage Impact: +8% (orchestration/: 22.53% → 75%)

Day 8-9: Integration Tests

File: tests/integration/test_end_to_end_workflows.py (new)

Test complete user journeys:

def test_complete_health_check_workflow():
    """Test full health check workflow execution."""
    orchestrator = MetaOrchestrator()
    memory = UnifiedMemory(user_id="test", config=MemoryConfig(redis_mock=True))

    # User journey: Request health check
    plan = orchestrator.analyze_and_compose(
        task="Run comprehensive health check on empathy-framework",
        context={"project_root": "."}
    )

    # Verify agents selected
    assert len(plan.agents) > 0
    assert plan.strategy in [CompositionPattern.PARALLEL, CompositionPattern.SEQUENTIAL]

    # Execute (mock LLM calls)
    with patch_llm_calls():
        result = execute_plan(plan)

    # Store results in memory
    memory.persist_pattern(
        content=result.summary,
        pattern_type="health_check_result"
    )

    # Verify persistence
    patterns = memory.search_patterns(pattern_type="health_check_result")
    assert len(patterns) > 0

Tests to Write: 20 integration tests

Coverage Impact: +5% (integration coverage across modules)

Day 10: Sprint 1 Validation

Run full test suite: pytest --cov=src --cov-report=html
Verify 70%+ coverage achieved
Document remaining gaps
Update architectural gap analysis

Sprint 1 Deliverables:

✅ ModelRegistry class (backward compatible)
✅ FallbackPolicy class
✅ 200 architectural tests enabled
✅ Meta-orchestrator testability improved
✅ Coverage: 54.67% → 70%+

Sprint 2: Core System Coverage (Weeks 3-4)

Objectives

Comprehensive orchestration testing (90% target)
Memory system edge cases (90% target)
Models & routing completeness (95% target)
Security module baseline (60%+)

Week 3: Orchestration Deep Dive

Day 11-12: Composition Pattern Testing

Focus: Test all 6 composition patterns thoroughly

class TestCompositionPatterns:
    """Test each composition pattern in isolation."""

    def test_parallel_pattern_execution(self):
        """Test parallel pattern distributes work correctly."""
        pattern = ParallelComposition()
        agents = [create_mock_agent("Agent1"), create_mock_agent("Agent2")]

        result = pattern.execute(task="parallel task", agents=agents)

        # Both agents should execute concurrently
        assert len(result.agent_results) == 2
        assert result.execution_time < sum(agent_times)  # Parallel speedup

    def test_sequential_pattern_execution(self):
        """Test sequential pattern maintains order."""
        pattern = SequentialComposition()
        agents = [create_mock_agent("Step1"), create_mock_agent("Step2")]

        result = pattern.execute(task="sequential task", agents=agents)

        # Step2 should receive Step1's output
        assert result.agent_results[1].input_context["previous_result"] == result.agent_results[0].output

    # ... 4 more pattern tests (Refinement, Hierarchical, Debate, Voting)

Tests to Write: 30 composition pattern tests

Coverage Impact: +6% (orchestration/execution_strategies.py: 0% → 75%)

Day 13-14: Agent Selection & Capability Matching

Focus: Verify agent selection logic

class TestAgentSelection:
    """Test agent selection algorithms."""

    def test_capability_based_selection(self):
        """Test agents selected by capability match."""
        requirements = TaskRequirements(
            complexity=TaskComplexity.COMPLEX,
            domain=TaskDomain.TESTING,
            capabilities_needed=["pytest", "coverage_analysis", "test_generation"]
        )

        orchestrator = MetaOrchestrator()
        agents = orchestrator._select_agents(requirements)

        # All required capabilities covered
        agent_capabilities = set()
        for agent in agents:
            agent_capabilities.update(agent.capabilities)

        assert "pytest" in agent_capabilities
        assert "coverage_analysis" in agent_capabilities
        assert "test_generation" in agent_capabilities

    def test_complexity_affects_agent_count(self):
        """Test that complex tasks get more agents."""
        simple_req = TaskRequirements(complexity=TaskComplexity.SIMPLE, ...)
        complex_req = TaskRequirements(complexity=TaskComplexity.COMPLEX, ...)

        simple_agents = orchestrator._select_agents(simple_req)
        complex_agents = orchestrator._select_agents(complex_req)

        assert len(complex_agents) >= len(simple_agents)

Tests to Write: 25 agent selection tests

Coverage Impact: +5% (orchestration/meta_orchestrator.py: 75% → 90%)

Week 4: Memory & Models Completeness

Day 15-16: Memory Edge Cases

Focus: TTL expiration, cross-tier operations, concurrency

class TestMemoryEdgeCases:
    """Test memory system edge cases and failure modes."""

    def test_ttl_expiration_does_not_lose_data(self):
        """Test that expiring short-term memory promotes to long-term."""
        memory = UnifiedMemory(...)

        # Store with auto-promotion enabled
        memory.stash("important_data", {"value": 42}, ttl=1)

        # Wait for TTL expiration
        time.sleep(1.5)

        # Should still be retrievable from long-term
        result = memory.retrieve("important_data")
        assert result is not None
        assert result["value"] == 42

    def test_concurrent_writes_maintain_consistency(self):
        """Test that concurrent writes don't corrupt data."""
        import threading

        memory = UnifiedMemory(...)
        errors = []

        def writer(key, value):
            try:
                memory.long_term.store(key, value)
                retrieved = memory.long_term.retrieve(key)
                assert retrieved == value
            except Exception as e:
                errors.append(e)

        threads = [
            threading.Thread(target=writer, args=(f"key{i}", {"id": i}))
            for i in range(100)
        ]

        for t in threads:
            t.start()
        for t in threads:
            t.join()

        assert len(errors) == 0  # No corruption

    def test_memory_survives_redis_restart(self):
        """Test that data persists across Redis restarts."""
        memory = UnifiedMemory(...)

        # Store data
        memory.persist_pattern(content="test", pattern_type="test")

        # Simulate Redis restart (disconnect and reconnect)
        memory._short_term = None
        memory._initialize_backends()

        # Long-term data should still be accessible
        patterns = memory.search_patterns(pattern_type="test")
        assert len(patterns) > 0

Tests to Write: 35 memory edge case tests

Coverage Impact: +8% (memory/: 65% → 90%)

Day 17-18: Routing & Cost Tracking

Focus: Task tier mapping, cost optimization, fallback activation

class TestRoutingAndCostTracking:
    """Test intelligent routing and cost tracking."""

    def test_task_type_maps_to_correct_tier(self):
        """Test TASK_TIER_MAP routing logic."""
        test_cases = [
            (TaskType.CODE_GENERATION, "capable"),  # Requires reasoning
            (TaskType.SIMPLE_COMPLETION, "cheap"),  # Simple task
            (TaskType.COMPLEX_REASONING, "premium"),  # Needs best model
        ]

        for task_type, expected_tier in test_cases:
            tier = TASK_TIER_MAP[task_type]
            assert tier == expected_tier

    def test_fallback_activates_on_rate_limit(self):
        """Test fallback when primary tier is rate limited."""
        policy = FallbackPolicy()
        executor = LLMExecutor(fallback_policy=policy)

        # Mock rate limit error
        with patch_rate_limit_error("cheap"):
            result = executor.execute(
                provider="anthropic",
                tier="cheap",
                messages=[...]
            )

        # Should have fallen back to capable tier
        assert result.tier_used == "capable"
        assert result.is_fallback is True

    def test_cost_tracking_accurate(self):
        """Test that cost tracking matches actual token usage."""
        executor = LLMExecutor()

        result = executor.execute(
            provider="anthropic",
            tier="cheap",
            messages=[{"role": "user", "content": "Hello"}]
        )

        # Cost should match (tokens * price_per_token)
        expected_cost = result.tokens_used * MODEL_PRICES["cheap"]
        assert abs(result.cost - expected_cost) < 0.001

Tests to Write: 30 routing & cost tests

Coverage Impact: +10% (models/: 73% → 95%)

Day 19-20: Sprint 2 Validation & Security Baseline

Run coverage: pytest --cov=src --cov-report=html
Write security module baseline tests (20 tests)
Document Sprint 2 achievements
Plan Sprint 3 priorities

Sprint 2 Deliverables:

✅ Orchestration at 90%+ coverage
✅ Memory at 90%+ coverage
✅ Models at 95%+ coverage
✅ Security baseline established (60%+)
✅ Coverage: 70% → 80%+

Sprint 3: Comprehensive Coverage & Edge Cases (Weeks 5-6)

Objectives

Workflow coverage to 95%
Security module to 90%
Remaining modules to 85%
Edge case and error handling coverage

Week 5: Workflows & Security

Day 21-23: Workflow Coverage

Focus: Test workflow base class, execution lifecycle, error handling

Target modules:

workflows/base.py (45% → 95%)
workflows/test_gen.py (68% → 95%)
workflows/config.py (89% → 98%)

Tests to Write: 40 workflow tests

Workflow state management
Multi-tier execution
Result aggregation
Error recovery
Resource cleanup

Coverage Impact: +6% (workflows/: 45-98% → 95% average)

Day 24-25: Security Module Deep Dive

Focus: Path validation, PII scrubbing, secrets detection, audit logging

class TestSecurityFeatures:
    """Comprehensive security testing."""

    def test_path_traversal_prevention(self):
        """Test all path traversal attack vectors."""
        from empathy_os.config import _validate_file_path

        attack_vectors = [
            "../../../etc/passwd",
            "config\x00.json",  # Null byte injection
            "/etc/shadow",
            "~/.ssh/id_rsa",
            "\\\\network\\share\\file"  # UNC path
        ]

        for attack in attack_vectors:
            with pytest.raises(ValueError):
                _validate_file_path(attack)

    def test_pii_scrubbing_comprehensive(self):
        """Test PII detection and scrubbing."""
        from empathy_os.memory.security.pii_scrubber import PIIScrubber

        scrubber = PIIScrubber()

        test_cases = [
            ("SSN: 123-45-6789", "SSN: [REDACTED-SSN]"),
            ("Email: user@example.com", "Email: [REDACTED-EMAIL]"),
            ("Phone: (555) 123-4567", "Phone: [REDACTED-PHONE]"),
            ("CC: 4111-1111-1111-1111", "CC: [REDACTED-CREDIT_CARD]"),
        ]

        for input_text, expected_output in test_cases:
            scrubbed, detections = scrubber.scrub(input_text)
            assert expected_output in scrubbed
            assert len(detections) > 0

    def test_audit_logging_complete(self):
        """Test that all security events are logged."""
        from empathy_os.memory.security.audit_logger import AuditLogger

        logger = AuditLogger()

        # Trigger security event
        logger.log_security_violation(
            user_id="test",
            violation_type="path_traversal",
            severity="HIGH",
            details={"attempted_path": "../../etc/passwd"}
        )

        # Verify logged
        events = logger.get_events(event_type="security_violation")
        assert len(events) == 1
        assert events[0].severity == "HIGH"

Tests to Write: 50 security tests

Coverage Impact: +12% (security/: 12% → 90%)

Week 6: Final Push & Polish

Day 26-27: Remaining Modules

Focus: CLI, project_index, telemetry

Modules to complete:

cli.py (56% → 80%)
project_index/scanner.py (34% → 85%)
telemetry/ (67% → 85%)

Tests to Write: 45 tests across remaining modules

Coverage Impact: +4% (final modules to target)

Day 28-29: Edge Cases & Error Handling

Focus: Test failure modes, resource limits, recovery scenarios

class TestEdgeCasesAndFailures:
    """Test system behavior under failure conditions."""

    def test_disk_full_during_write(self):
        """Test graceful handling when disk is full."""
        memory = LongTermMemory()

        with patch_disk_full():
            success = memory.store("key", {"data": "value"})

        assert success is False  # Should fail gracefully, not crash

    def test_corrupted_memory_file(self):
        """Test handling of corrupted JSON files."""
        memory = LongTermMemory()

        # Create corrupted file
        corrupt_path = memory.storage_path / "corrupt.json"
        corrupt_path.write_text("{invalid json")

        # Should return None, not crash
        result = memory.retrieve("corrupt")
        assert result is None

    def test_max_agents_limit_enforced(self):
        """Test that resource limits prevent runaway agent spawning."""
        orchestrator = MetaOrchestrator()

        requirements = TaskRequirements(
            complexity=TaskComplexity.COMPLEX,
            capabilities_needed=["cap" + str(i) for i in range(100)]
        )

        agents = orchestrator._select_agents(requirements)

        # Should cap at reasonable limit (e.g., 10 agents)
        assert len(agents) <= 10

Tests to Write: 30 edge case tests

Coverage Impact: +2% (edge cases across all modules)

Day 30: Final Validation & Documentation

Run full test suite with coverage
Generate coverage report: pytest --cov=src --cov-report=html --cov-report=term
Verify 85%+ achieved
Update documentation:
- API reference
- Architecture diagrams
- Test coverage report
- Known gaps and future work

Sprint 3 Deliverables:

✅ Workflows at 95%+
✅ Security at 90%+
✅ All modules at 85%+
✅ Edge cases covered
✅ Coverage: 80% → 85%+

Success Metrics

Coverage Targets by Module

Module	Week 0	Week 2	Week 4	Week 6	Status
orchestration/	22.53%	75%	90%	90%	✅
memory/	18-27%	65%	90%	90%	✅
models/	21-73%	80%	95%	95%	✅
workflows/	45-98%	50%	70%	95%	✅
security/	12%	20%	60%	90%	✅
telemetry/	67%	70%	75%	85%	✅
project_index/	34%	40%	60%	85%	✅
cli.py	56%	60%	70%	80%	✅
Overall	54.67%	70%	80%	85%+	🎯

Test Count Progression

Week 0: 6,615 tests
Week 2: ~6,900 tests (+285)
Week 4: ~7,150 tests (+535)
Week 6: ~7,400 tests (+785)

Quality Gates

All sprints must maintain:

✅ 100% of existing tests passing
✅ No new linter warnings (ruff, mypy)
✅ No security issues (bandit scan clean)
✅ All architectural invariants validated
✅ Documentation updated with API changes

Risk Mitigation

Risk 1: OOP Refactoring Breaks Existing Code

Mitigation:

Maintain backward-compatible functional interfaces
Use deprecation warnings, not breaking changes
Run full test suite after each refactoring step

Rollback Plan:

Keep old implementation behind feature flag
Document breaking changes clearly
Provide migration guide

Risk 2: 85% May Be Too Aggressive

Mitigation:

Prioritize high-value coverage (critical paths)
Accept 80%+ as success if 85% unrealistic
Focus on architectural coverage over line coverage

Acceptance Criteria:

80%+ overall coverage = success
90%+ on critical modules (orchestration, memory, models)
95%+ on critical paths (user journeys)

Risk 3: Solo Developer Burnout

Mitigation:

Realistic daily goals (10-15 tests/day)
Built-in buffer days (30 days for 6 weeks of work)
Sprint reviews to adjust pace

Adjustment Plan:

Extend timeline if needed (6 weeks → 8 weeks)
Deprioritize P2 modules if time constrained
Focus on P0/P1 first, P2 as stretch goals

Daily Rhythm (Recommended)

Morning (3-4 hours):

Write 10-15 new tests
Fix any failures
Refactor code for testability if needed

Afternoon (2-3 hours):

Review coverage gains: pytest --cov=src --cov-report=term-missing
Document findings
Plan next day's tests

Weekly Review (Fridays):

Run full test suite
Generate coverage report
Update progress tracker
Adjust plan based on actual velocity

Deliverables Summary

Sprint 1 (Weeks 1-2)

ModelRegistry class
FallbackPolicy class
200 architectural tests enabled
Meta-orchestrator refactored for testability
Coverage: 54.67% → 70%

Sprint 2 (Weeks 3-4)

Comprehensive composition pattern tests
Memory edge case coverage
Routing and cost tracking complete
Security baseline established
Coverage: 70% → 80%

Sprint 3 (Weeks 5-6)

Workflow coverage complete
Security module comprehensive
All modules at target coverage
Edge cases and error handling
Coverage: 80% → 85%+

Post-Sprint Work

Immediate Follow-Up

Performance regression testing
Integration test suite expansion
Load testing for concurrent workflows
Security audit (penetration testing)

Future Enhancements

Property-based testing (hypothesis)
Mutation testing (mutmut)
Benchmarking suite
CI/CD pipeline optimization

Appendix A: Test Templates

Unit Test Template

class TestFeatureName:
    """Test [feature] functionality."""

    def setup_method(self):
        """Set up test fixtures."""
        self.subject = FeatureClass()

    def test_happy_path(self):
        """Test normal operation."""
        result = self.subject.method(valid_input)
        assert result == expected_output

    def test_edge_case_empty_input(self):
        """Test behavior with empty input."""
        with pytest.raises(ValueError):
            self.subject.method("")

    def test_error_handling(self):
        """Test error handling."""
        with pytest.raises(SpecificError):
            self.subject.method(invalid_input)

Integration Test Template

def test_end_to_end_workflow():
    """Test complete user journey."""
    # Setup
    orchestrator = MetaOrchestrator()
    memory = UnifiedMemory(...)

    # Execute
    plan = orchestrator.analyze_and_compose(task="...", context={})
    result = execute_plan(plan)
    memory.persist_pattern(result)

    # Verify
    assert result.success is True
    assert memory.search_patterns(...) is not None

Appendix B: Coverage Commands

# Run full test suite with coverage
pytest --cov=src --cov-report=html --cov-report=term-missing

# Run specific module coverage
pytest tests/unit/orchestration/ --cov=src/empathy_os/orchestration

# Generate coverage badge
coverage-badge -o coverage.svg

# Find untested lines
pytest --cov=src --cov-report=term-missing | grep "0%"

# Coverage diff (before/after comparison)
diff <(coverage report) <(coverage report)

Status: ✅ Plan Complete - Ready for Execution Next Step: Begin Sprint 1, Day 1 - ModelRegistry Implementation Document Version: 1.0 Last Updated: January 16, 2026

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Sprint Series: Achieving 85%+ Test Coverage

Executive Summary

Coverage Breakdown Analysis

Current Coverage by Module

Sprint Series Overview

Sprint 1: OOP Foundation & Critical Gaps (Weeks 1-2)

Sprint 2: Core System Coverage (Weeks 3-4)

Sprint 3: Comprehensive Coverage & Edge Cases (Weeks 5-6)

Sprint 1: OOP Foundation & Critical Gaps (Weeks 1-2)

Objectives

Week 1: ModelRegistry & Routing

Day 1-2: Create ModelRegistry Class (P1)

Day 3-4: Create FallbackPolicy Class (P1)

Day 5: Update UnifiedMemory Test Suite

Week 2: Meta-Orchestrator & Integration Tests

Day 6-7: Extract Testable Methods (Gap 1.3)

Day 8-9: Integration Tests

Day 10: Sprint 1 Validation

Sprint 2: Core System Coverage (Weeks 3-4)

Objectives

Week 3: Orchestration Deep Dive

Day 11-12: Composition Pattern Testing

Day 13-14: Agent Selection & Capability Matching

Week 4: Memory & Models Completeness

Day 15-16: Memory Edge Cases

Day 17-18: Routing & Cost Tracking

Day 19-20: Sprint 2 Validation & Security Baseline

Sprint 3: Comprehensive Coverage & Edge Cases (Weeks 5-6)

Objectives

Week 5: Workflows & Security

Day 21-23: Workflow Coverage

Day 24-25: Security Module Deep Dive

Week 6: Final Push & Polish

Day 26-27: Remaining Modules

Day 28-29: Edge Cases & Error Handling

Day 30: Final Validation & Documentation

Success Metrics

Coverage Targets by Module

Test Count Progression

Quality Gates

Risk Mitigation

Risk 1: OOP Refactoring Breaks Existing Code

Risk 2: 85% May Be Too Aggressive

Risk 3: Solo Developer Burnout

Daily Rhythm (Recommended)

Deliverables Summary

Sprint 1 (Weeks 1-2)

Sprint 2 (Weeks 3-4)

Sprint 3 (Weeks 5-6)

Post-Sprint Work

Immediate Follow-Up

Future Enhancements

Appendix A: Test Templates

Unit Test Template

Integration Test Template

Appendix B: Coverage Commands