Intelligent WASM Auto-Fix Engine Architecture (v2)

System Flow Diagram (WASM + Worker)

┌─────────────────────────────────────────────────────────────────────────┐
│                         USER CLICKS "PREVIEW FIXES"                      │
└────────────────────────────────────┬────────────────────────────────────┘
                                     │
                    ┌────────────────▼───────────────────────────────────┐
                    │ 1. DATA MARSHALING (JS)                            │
                    │    - Extract diagram.json                          │
                    │    - Collect active validation errors              │
                    │    - Send to Web Worker                            │
                    └────────────────┬───────────────────────────────────┘
                                     │
                    ┌────────────────▼───────────────────────────────────┐
                    │ 2. INTELLIGENT PLANNING (WASM Worker)              │
                    │    - Build Circuit Graph (Topological)             │
                    │    - Priority Sorting (Power > Logic > Signal)     │
                    │    - Semantic Pattern Matching                     │
                    │    - Resolve Conflicts (Dependency-Aware)          │
                    └────────────────┬───────────────────────────────────┘
                                     │
                    ┌────────────────▼───────────────────────────────────┐
                    │ 3. GHOST PREVIEW (JS Canvas)                       │
                    │    - Render added components (40% opacity)         │
                    │    - Render ghost wires (glow effects)             │
                    │    - Interactive conflict selection                │
                    └────────────────┬───────────────────────────────────┘
                                     │
                    ┌────────────────▼───────────────────────────────────┐
                    │ 4. USER CONFIRMATION                               │
                    │    - User reviews ghost circuit                    │
                    │    - Clicks "Apply Selected Fixes"                 │
                    └────────────────┬───────────────────────────────────┘
                                     │
                    ┌────────────────▼───────────────────────────────────┐
                    │ 5. ATOMIC COMMIT (JS)                              │
                    │    - Merge ghost elements into diagram.json        │
                    │    - Clear validation cache                        │
                    │    - Save history snapshot                         │
                    └────────────────────────────────────────────────────┘

Component Architecture

┌──────────────────────────────────────────────────────────────────┐
│                    CIRCUIT FIX ENGINE (WASM)                     │
└──────────────────────────────────────────────────────────────────┘
         │                    │                    │
         ▼                    ▼                    ▼
    ┌───────────┐       ┌─────────────┐      ┌──────────────┐
    │ GRAPH     │       │ STRATEGIST  │      │ LIFT/LOWER   │
    │ ANALYZER  │       │ (TOPOLOGY)  │      │ BRIDGE (JS)  │
    └───────────┘       └─────────────┘      └──────────────┘
         │                    │                    │
    Topological Sort    Dependency Map       Memory Bridge
    Conflict Detection  Repair Strategy      JSON Serialization

Strategy: Dependency-Aware Fixing

Unlike the legacy heuristic engine, the WASM engine understands order of operations:

1. Level 1: Infrastructure (Power/Ground)
   • Missing GND, VCC rails.
   • Reverse polarity correction.
2. Level 2: Signal Integrity (Conditioning)
   • Missing pull-ups/pull-downs.
   • Decoupling capacitors.
3. Level 3: Peripheral Logic
   • SPI/I2C connections.
   • External component wiring.

Performance Advantage

By offloading the graph traversal and pattern matching to WASM:

• Zero UI Stutter: Complex circuit analysis (100+ components) runs in <5ms without blocking the 60fps canvas.
• Deeper Search: The engine can simulate "what-if" scenarios for multiple fix combinations before presenting the best one.

Implementation Details

• WASM Source: openhw-studio-autofix-engine/assembly/index.ts
• Frontend Bridge: OpenHW-studio-frontend/src/worker/autofix.worker.ts
• Ghost Rendering: Custom isGhost prop in SimulatorPage.jsx components.

Multi-Environment Support (CLI/MCP)

The engine is designed to be environment-agnostic. While currently integrated via a Web Worker in the browser, it can be deployed to:

• CLI: A Node.js wrapper can instantiate the 'release.wasm' directly to provide command-line circuit repair.
• MCP: An AI Model Context Protocol server can use the engine to suggest fixes directly to an AI agent during a coding/design session.
• CI/CD: Automated pull-request checks can use the WASM core to flag unfixable violations or suggest repairs before merging.