---
phase: 05-retrieval-orchestrator
verified: 2026-02-03T12:15:00Z
status: passed
score: 8/8 must-haves verified
---
# Phase 5: Retrieval Orchestrator Verification Report
**Phase Goal:** System coordinates all retrieval strategies into a single pipeline that returns complete, conflict-free component sets for any task description
**Verified:** 2026-02-03T12:15:00Z
**Status:** PASSED
**Re-verification:** No - initial verification
## Goal Achievement
### Observable Truths
| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | Given a task description, pipeline returns ranked components within latency SLA | VERIFIED | RetrievalPipeline.retrieve() exists, returns PipelineResult with ranked components. Test: test_returns_pipeline_result passes |
| 2 | Simple queries complete in under 500ms | VERIFIED | Test test_simple_query_under_500ms passes with actual latency tracking |
| 3 | Complex queries complete in under 1000ms | VERIFIED | Test test_pipeline_latency_under_1000ms passes, verifies latency_ms < 1000 |
| 4 | Repeated queries hit cache and return faster | VERIFIED | Test test_cached_call_faster passes, confirms cache_hit=True and faster latency |
| 5 | Given recommended components, all transitive dependencies are included in result | VERIFIED | resolve_transitive_dependencies() uses nx.descendants() on DEPENDS_ON subgraph. Test test_resolve_transitive passes |
| 6 | Conflicts between recommended components are detected and surfaced | VERIFIED | detect_conflicts() traverses CONFLICTS_WITH edges. Test test_detect_single_conflict passes |
| 7 | Dependency resolution handles cycles gracefully without infinite loops | VERIFIED | Test test_handles_cycle_gracefully passes without hanging |
| 8 | Missing graph nodes in dependency chain are handled without crashing | VERIFIED | Test test_resolve_missing_node passes, returns gracefully |
**Score:** 8/8 truths verified
### Required Artifacts
| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| src/skill_retriever/workflows/models.py | PipelineResult, ConflictInfo dataclasses | VERIFIED | 33 lines, exports PipelineResult and ConflictInfo with all required fields |
| src/skill_retriever/workflows/pipeline.py | RetrievalPipeline coordinator class | VERIFIED | 269 lines, orchestrates 6 retrieval stages with LRU cache and latency tracking |
| src/skill_retriever/workflows/dependency_resolver.py | Transitive dependency resolution and conflict detection | VERIFIED | 147 lines, exports resolve_transitive_dependencies and detect_conflicts functions |
| tests/test_pipeline.py | Pipeline tests including latency verification | VERIFIED | 354 lines (>50 min), 16 test methods covering caching, latency SLAs, type filter, budget, dependencies, conflicts |
| tests/test_dependency_resolver.py | Tests for dependency resolution and conflict detection | VERIFIED | 310 lines (>60 min), 16 test methods covering transitive resolution, conflict detection, cycle handling |
### Key Link Verification
| From | To | Via | Status | Details |
|------|----|----|--------|---------|
| pipeline.py | nodes/retrieval/* | Import statements | WIRED | Lines 10-22: imports context_assembler, flow_pruner, models, ppr_engine, query_planner, score_fusion, vector_search |
| pipeline.py | memory/graph_store.py | GraphStore protocol usage | WIRED | Lines 74, 113, 139, 169, 173: calls to graph_store methods in pipeline stages |
| dependency_resolver.py | nx.descendants | Transitive closure | WIRED | Line 76: nx.descendants(depends_on_subgraph, component_id) for transitive resolution |
| dependency_resolver.py | EdgeType.CONFLICTS_WITH | Conflict detection | WIRED | Line 116: edge.edge_type != EdgeType.CONFLICTS_WITH check |
| pipeline.py | dependency_resolver | Pipeline integration | WIRED | Lines 23-25: imports resolve_transitive_dependencies and detect_conflicts; Lines 168, 173: calls both functions |
### Requirements Coverage
| Requirement | Status | Blocking Issue |
|-------------|--------|----------------|
| GRPH-02: System resolves transitive dependency chains via multi-hop traversal | SATISFIED | All transitive dependency truths verified |
| GRPH-03: Given task description, system returns complete component set needed | SATISFIED | Pipeline integrates dependency resolution before context assembly |
| GRPH-04: System validates component compatibility and surfaces conflicts | SATISFIED | Conflict detection integrated, ConflictInfo populated in PipelineResult |
### Anti-Patterns Found
None detected. All files substantive, no TODO/FIXME/placeholder patterns found.
### Test Results
**All tests passing:** 156/156 tests pass
- test_pipeline.py: 16/16 pass
- test_dependency_resolver.py: 16/16 pass
- Full test suite: 156 tests in 12.59s
**Latency SLA verification:**
- Simple queries: <500ms (verified via test_simple_query_under_500ms)
- Complex queries: <1000ms (verified via test_pipeline_latency_under_1000ms)
### Implementation Quality
**Pipeline orchestration:**
- 6-stage retrieval flow: query_plan -> vector_search -> PPR -> flow_prune -> fuse -> dependency_resolve -> conflict_detect -> assemble
- LRU cache with 128 default entries
- Cache hit detection and statistics tracking
- Latency monitoring via time.perf_counter()
- Early exit optimization for high-confidence vector results
**Dependency resolution:**
- Uses nx.descendants() on DEPENDS_ON-only subgraph for transitive closure
- Handles cycles gracefully with warning log
- Handles missing nodes without crashing
- Returns tuple of (all_ids, newly_added_ids)
**Conflict detection:**
- Traverses CONFLICTS_WITH edges bidirectionally
- Uses frozenset for deduplication (A-conflicts-B same as B-conflicts-A)
- Extracts reason from edge metadata with default fallback
**Integration:**
- Dependencies resolved BEFORE context assembly (ensures token budget includes deps)
- Dependencies added to results with source='dependency' and min score 0.1
- Conflicts populated in PipelineResult for downstream consumption
---
## Verification Summary
Phase 5 goal ACHIEVED. The system successfully coordinates all retrieval strategies into a unified pipeline that:
1. Returns complete component sets with all transitive dependencies resolved
2. Detects and surfaces conflicts before returning results
3. Meets latency SLAs (<500ms simple, <1000ms complex queries)
4. Enforces token budget (2000 tokens default)
All 8 must-have truths verified. All 5 required artifacts substantive and wired. All 5 key links functional. All 3 requirements satisfied. 156 tests passing.
Ready to proceed to Phase 6: MCP Server & Installation.
---
_Verified: 2026-02-03T12:15:00Z_
_Verifier: Claude (gsd-verifier)_
