Update README.md

README.md

@@ -32,83 +32,8 @@ A ranking system built purely on heuristic scoring rules tends to reward whateve
 
 The pipeline is split into two phases. The offline phase has no time limit and produces a set of precomputed artifacts. The online phase is what actually runs during the competition's 300 second window, and only touches those artifacts plus the live candidate pool.
 
-```mermaid
- flowchart TD
-    %% Define classes with light pastel fills, complementary borders, and dark text for contrast
-    classDef data fill:#e0f2fe,stroke:#0284c7,stroke-width:1px,color:#0f172a;
-    classDef llm fill:#f3e8ff,stroke:#7e22ce,stroke-width:1px,color:#0f172a;
-    classDef offline fill:#ffedd5,stroke:#c2410c,stroke-width:1px,color:#0f172a;
-    classDef online fill:#dcfce7,stroke:#15803d,stroke-width:1px,color:#0f172a;
-
-    candidates_jsonl["candidates.jsonl<br/>(100,000 records)"]:::data
-    submission_csv["submission.csv<br/>(100 ranked candidates)"]:::data
-
-    subgraph offline_phase [OFFLINE PHASE]
-        subgraph gemma3_annotation [GEMMA3 PAIRWISE ANNOTATION]
-            stratified_sample["Stratified Sample of<br/>500 Candidates"]:::llm
-            pairwise_comparisons["2,500 Pairwise Comparisons<br/>(Local Gemma3 LLM)"]:::llm
-            elo_ratings["Laplace-smoothed<br/>Elo Ratings"]:::llm
-            relevance_labels["Quartile Thresholding to<br/>Relevance Labels 0-3"]:::llm
-            
-            stratified_sample --> pairwise_comparisons
-            pairwise_comparisons --> elo_ratings
-            elo_ratings --> relevance_labels
-        end
-        
-        bm25_index_build["BM25 Index Build<br/>(NumPy CSR matrix)"]:::offline
-        static_feature_precompute["Static Feature Precompute<br/>(18 JD-independent features)"]:::offline
-        
-        lightgbm_training["LIGHTGBM TRAINING<br/>Objective: lambdarank<br/>early stop on NDCG@5"]:::offline
-        
-        bm25_index_build --> precomputed_artifacts_box
-        static_feature_precompute --> precomputed_artifacts_box
-        relevance_labels --> lightgbm_training
-        static_feature_precompute --> lightgbm_training
-        bm25_index_build --> lightgbm_training
-        
-        lightgbm_training --> precomputed_artifacts_box
-        
-        precomputed_artifacts_box["PRECOMPUTED ARTIFACTS<br/>lgbm_model.txt<br/>bm25_matrix.npz<br/>static_features.pkl"]:::data
-    end
-    
-    subgraph online_ranking_phase [ONLINE RANKING PHASE]
-        stage_0["Stage 0: Load Precomputed Artifacts<br/>(BM25, LightGBM, static features)"]:::online
-        
-        stage_1["Stage 1: Dual-pass BM25 Retrieval<br/>Pass A: JD skills on skills array<br/>Pass B: production keywords on career descriptions<br/>Narrow to ~8,500 candidates"]:::online
-        
-        stage_2["Stage 2: Load Stage 1 Records<br/>(Byte-offset index, O(1))"]:::online
-        
-        stage_2b["Stage 2b: Feature Engineering<br/>(22 features, adversarial detection,<br/>consistency score)"]:::online
-        
-        stage_4["Stage 4: LightGBM Inference<br/>(final_score = raw_score * consistency_score)"]:::online
-        
-        stage_5["Stage 5: Reasoning Compiler<br/>(Deterministic grammar, 4 templates,<br/>priority concerns, numeric audit)"]:::online
-        
-        stage_6["Stage 6: Blocking Audits + CSV Write<br/>(Honeypot, diversity, monotonicity checks)"]:::online
-        
-        stage_0 --> stage_1
-        stage_1 --> stage_2
-        stage_2 --> stage_2b
-        stage_2b --> stage_4
-        stage_4 --> stage_5
-        stage_5 --> stage_6
-        stage_6 --> submission_csv
-    end
-    
-    candidates_jsonl --> offline_phase
-    candidates_jsonl --> stage_1
-
-    precomputed_artifacts_box --> stage_0
-    precomputed_artifacts_box -.-> stage_2
-    precomputed_artifacts_box -.-> stage_2b
-    precomputed_artifacts_box -.-> stage_4
-    
-    %% Use transparent fills (none) so it inherits GitHub's native dark/light themes seamlessly
-    style offline_phase fill:none,stroke:#777,stroke-width:2px,stroke-dasharray: 5 5
-    style online_ranking_phase fill:none,stroke:#777,stroke-width:2px,stroke-dasharray: 5 5
-    style gemma3_annotation fill:none,stroke:#555,stroke-width:1px   
-
-```        
+![App Architecture](model_training_architecture.png)
+
 ---
 
 ## Quick Start