## Implementation Complete ### What was implemented: 1. **Frontend project structure** (Vite + React + TypeScript) in src/trckr_plow/web/frontend/ 2. **Zustand store** (src/store/workflowStore.ts) with: - workflowState: Full workflow state matching backend WorkflowState from state.py - logs: Log message buffer (capped at 1000 FIFO) - connectionStatus: WebSocket connection state - error: Last error message 3. **Actions implemented**: - updateWorkflowState(state): Partial updates with deep merge - setWorkflowState(state): Replace entire state - appendLog(message): Add log with automatic cap - setConnectionStatus(status): Update connection state - setError(error): Set/clear error - clearLogs(): Clear log buffer - reset(): Reset to initial state 4. **Selector hooks** for subscribing to specific slices: - useWorkflowProgress(), useCurrentIssue(), useQueueStatus() - useSessionStats(), useDecisions(), useConnectionStatus() - useLogs(), useError() 5. **TypeScript types** (src/types/workflow.ts) mirroring backend dataclasses 6. **WebSocket hook** (src/hooks/useWebSocket.ts) with: - Auto-connect on mount - Auto-reconnect with exponential backoff (max 30s) - JSON message parsing and dispatch to store - Clean disconnect on unmount ### Verification: - TypeScript compilation: No errors - Vite build: Successful - Frontend tests: 11 tests passing - Backend tests: 835 tests passing (2 pre-existing flaky visualization tests)

## Feature Triage Complete **Status:** NOT IMPLEMENTED (Frontend project doesn't exist yet) **Summary:** This feature creates a Zustand store for managing frontend state from WebSocket messages. The backend infrastructure is already in place (WorkflowState in state.py, WebSocket server in web/server.py). **Key Findings:** - Must complete **PLOW-51** first (creates frontend project structure) - Should implement alongside **PLOW-52** (WebSocket hook) - Types should mirror backend WorkflowState from state.py - Implementation is straightforward - Zustand is simple, requirements are clear **Complexity:** Low **Scope:** Small (single store file + types) See attached triage report for implementation approach and code examples.