Merge pull request #64 from lufftw/review/pattern-graph

review(graph): Complete pattern quality review

Author: lufftw

docs/patterns/graph/templates.md

@@ -1298,8 +1298,6 @@ class SolutionUnionFind:
 
 ---
 
----
-
 ## 9. Pattern Comparison Matrix
 
 ### 9.1 By Problem Type
@@ -1346,8 +1344,6 @@ class SolutionUnionFind:
 
 ---
 
----
-
 ## 10. Pattern Decision Guide
 
 ### 10.1 Quick Decision Tree
@@ -1415,8 +1411,6 @@ def is_valid(r: int, c: int) -> bool:
 
 ---
 
----
-
 ## 11. Quick Reference Templates
 
 ### 11.1 Template 1: DFS Connected Components (Grid)

docs/reviews/pattern-review-log.md

@@ -46,7 +46,7 @@ This log records all pattern review findings, decisions, and resolutions. Each r
 | dp_1d_linear | Pending | - | - | Queued |
 | dp_knapsack_subset | Pending | - | - | Queued |
 | game_theory_dp | Pending | - | - | Queued |
-| graph | Pending | - | - | Queued |
+| graph | Tier 2 | 2025-01-07 | 0/0/1/0 | Reviewed |
 | greedy_core | Pending | - | - | Queued |
 | heap | Tier 2 | 2025-01-07 | 0/0/1/0 | Reviewed |
 | interval | Pending | - | - | Queued |
@@ -376,4 +376,63 @@ END TEMPLATE
 
 ---
 
+## Graph Review - 2025-01-07
+
+### Files Reviewed
+- `docs/patterns/graph/templates.md` (1594 lines)
+- `docs/patterns/graph/intuition.md` (270 lines)
+
+### Reference Standards
+- Gold Standard: `sliding_window/templates.md`
+- Ontology Entries: `GraphDFS`, `GraphBFS` from `ontology/api_kernels.toml`
+
+### Findings
+
+#### [GR-001]: Duplicate Section Separators
+
+| Field | Value |
+|-------|-------|
+| **Category** | Engineering |
+| **Severity** | Minor |
+| **Location** | `docs/patterns/graph/templates.md:1300-1301, 1348-1349, 1416-1418` |
+| **Issue** | Double `---` separators appear between sections 8-9, 9-10, and 10-11, creating visual inconsistency. |
+| **Why It Matters** | Cosmetic issue affecting document consistency. Does not impact functionality. |
+| **Decision** | Fix |
+| **Resolution** | Remove duplicate separators. |
+
+### Positive Observations (Not Issues)
+
+| Aspect | Assessment |
+|--------|------------|
+| **API Kernel Header** | ✅ Two kernels clearly stated: `GraphDFS`, `GraphBFS` |
+| **Core Invariants** | ✅ Explicit: visited prevents revisiting; BFS levels = distance |
+| **Pattern Variants** | ✅ 6 variants: Connected Components, Clone, Multi-source BFS, Bipartite, Shortest Path, Grid Traversal |
+| **Template Quick Reference** | ✅ Correctly placed at Section 11 (end) with 6 templates |
+| **Decision Flowchart** | ✅ Comprehensive ASCII decision tree (Section 10) |
+| **DFS vs BFS Comparison** | ✅ Clear guidance on when to use each |
+| **Grid Traversal Helpers** | ✅ DIRECTIONS constant and get_neighbors documented |
+| **Trace Examples** | ✅ Step-by-step grid state evolution shown |
+| **Intuition Quality** | ✅ Excellent "maze exploration" mental model |
+| **Common Pitfalls** | ✅ 5 pitfalls documented with code fixes |
+| **Practice Progression** | ✅ Level 1-5 problem sequence |
+
+### Summary
+
+| Category | Critical | Major | Minor | Nit | Total |
+|----------|----------|-------|-------|-----|-------|
+| Concept | 0 | 0 | 0 | 0 | 0 |
+| Explanation | 0 | 0 | 0 | 0 | 0 |
+| Engineering | 0 | 0 | 1 | 0 | 1 |
+| **Total** | 0 | 0 | 1 | 0 | **1** |
+
+### Tier Assessment
+- **Previous Tier**: Pending
+- **New Tier**: Tier 2 (Silver)
+- **Rationale**: Comprehensive coverage of graph traversal patterns with excellent structure. Two API kernels (DFS/BFS) clearly differentiated. Outstanding intuition.md with mental models, pitfalls, and practice progression. Minor cosmetic issue with duplicate separators.
+
+### Action Items
+- [x] Fix duplicate section separators
+
+---
+
 *Pattern Review Log - NeetCode Practice Framework*