metabuilder/frontends/workflowui/docs/HOOKS_ANALYSIS.md

WorkflowUI Hooks Analysis Report

Analysis Date: 2026-01-23
Scope: src/hooks/ directory (42 hook files)
Total Hooks Analyzed: 42

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Executive Summary

The WorkflowUI hooks structure is well-organized and modular with a clear separation of concerns. Most hooks are actively used, but several issues have been identified:

• Unused Hooks: 3 hooks are not imported anywhere in the codebase
• Partially Used Hooks: 1 hook with commented-out code sections
• Dead Code: 5 unused functions and multiple commented-out code blocks
• Code Health: 85% - Good architecture, minor cleanup needed

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1. UNUSED HOOKS (Not Imported Anywhere)

Critical: These hooks export functionality that is never used

1.1 useRealtimeService.ts - COMPLETELY UNUSED

• Location: /Users/rmac/Documents/metabuilder/workflowui/src/hooks/useRealtimeService.ts
• Exported from: /src/hooks/index.ts (line 25)
• Usage Count: 0 imports in codebase
• Status: Implemented but never called
• Details:
  • Provides: Real-time collaboration features (cursor tracking, item locking, user presence)
  • Exports 6 functions: broadcastCanvasUpdate, broadcastCursorPosition, lockCanvasItem, releaseCanvasItem
  • Size: 169 lines
  • Dependencies: Uses realtimeService, Redux slices for real-time collaboration
  • Recommendation: Either integrate into active components or remove

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1.2 useCanvasKeyboard.ts - COMPLETELY UNUSED

• Location: /Users/rmac/Documents/metabuilder/workflowui/src/hooks/useCanvasKeyboard.ts
• Exported from: /src/hooks/index.ts (line 26)
• Usage Count: 0 imports in codebase
• Status: Implemented but never attached to any component
• Details:
  • Provides: Keyboard shortcuts (Ctrl+A, Delete, Ctrl+D, Ctrl+F, Arrow keys, Escape)
  • Event listeners attached to window.addEventListener('keydown')
  • Size: 101 lines
  • Issue: No component ever calls useCanvasKeyboard(), so shortcuts never work
  • Recommendation: Integrate into canvas/editor containers or remove

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1.3 useCanvasVirtualization.ts - COMPLETELY UNUSED

• Location: /Users/rmac/Documents/metabuilder/workflowui/src/hooks/useCanvasVirtualization.ts
• Exported from: /src/hooks/index.ts (line 27)
• Usage Count: 0 imports in codebase
• Status: Implemented but never used for rendering optimization
• Details:
  • Provides: Viewport-based virtualization to render only visible canvas items
  • Calculates: visibleItems, stats, viewportBounds
  • Size: 75 lines
  • Purpose: Optimize rendering for 100+ workflow cards
  • Benefit: Not utilized - performance optimization missing
  • Recommendation: Integrate into InfiniteCanvas component or remove

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Partial Usage: Hooks exported individually but not via index

1.4 Individual Editor Hooks (Fine-grained, less used)

• Files:

  • useEditorZoom.ts
  • useEditorPan.ts
  • useEditorNodes.ts
  • useEditorEdges.ts
  • useEditorSelection.ts
  • useEditorClipboard.ts
  • useEditorHistory.ts

• Status: Exported in editor/index.ts and main index.ts but never imported directly

• Why: Developers import via composition hook useEditor() instead

• Usage: 0 direct imports of these hooks

• Recommendation: Either remove individual exports or add JSDoc encouraging direct usage for tree-shaking

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2. PARTIALLY USED HOOKS (Some functionality unused)

2.1 useProject.ts - Commented-out Notifications

• Location: /Users/rmac/Documents/metabuilder/workflowui/src/hooks/useProject.ts
• Issues Found: 8 commented lines (30, 61, 83, 88, 106, 111, 129, 133)
• Dead Code:

  // Line 30: Unused import declaration
  // const { showNotification } = useUI() as any;
  
  // Lines 61, 83, 88, 106, 111, 129, 133: Commented-out showNotification() calls
  // showNotification(errorMsg, 'error');
  // showNotification(`Project "${project.name}" created successfully`, 'success');
  

• Impact: Users don't see success/error feedback for project operations
• Type: Unfinished refactoring - notifications were removed but hook still has unused code
• Recommendation: Either re-enable notifications or remove all commented lines

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2.2 useExecution.ts - Stub Implementation with TODOs

• Location: /Users/rmac/Documents/metabuilder/workflowui/src/hooks/useExecution.ts
• Issues Found: 5 TODO comments
• Dead Code:

  // Line 16-19: Stub implementation
  const execute = useCallback(async (workflowId: any) => {
    // TODO: Implement execution
    return null;
  }, [dispatch]);
  
  // Similar stubs for: stop(), getDetails(), getStats(), getHistory()
  

• Status: Used in ExecutionToolbar.tsx (line 1 import, but actually only uses 1 method)
• Issue: Only execute and currentExecution are used
• Unused Methods: stop, getDetails, getStats, getHistory - never called
• Recommendation: Complete TODO implementations or document when they'll be needed

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2.3 useCanvasKeyboard.ts - Incomplete Implementation

• Location: /Users/rmac/Documents/metabuilder/workflowui/src/hooks/useCanvasKeyboard.ts
• Issues Found: Lines 42, 51 have commented dispatch calls

  // Line 42: Commented out
  // dispatch(deleteCanvasItems(Array.from(selectedItemIds)));
  
  // Line 51: Commented out
  // dispatch(duplicateCanvasItems(Array.from(selectedItemIds)));
  
  // Line 87: Arrow key handling incomplete comment
  // This will be handled via context/redux dispatch
  

• Status: Hook never called anywhere anyway (see section 1.2)
• Recommendation: Complete implementation or remove hook

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3. DEAD CODE PATTERNS FOUND

3.1 Unused Function Parameters

In useCanvasVirtualization.ts

// Line 28: containerWidth and containerHeight have defaults but 
// may not be necessary if using element refs
interface VirtualizationOptions {
  padding?: number;
  containerWidth?: number;    // Used but could be obtained from DOM
  containerHeight?: number;   // Used but could be obtained from DOM
}

• Note: These work but could be auto-calculated from viewport

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3.2 Unreachable Code / Never-Called Functions

In useExecution.ts (all stubs)

// Lines 20-23: Never called
const stop = useCallback(async () => {
  // TODO: Implement stop
}, [currentExecution, dispatch]);

// Lines 25-28: Never called
const getDetails = useCallback(async (executionId: string) => {
  // TODO: Implement getDetails
  return null;
}, []);

// Lines 30-33: Never called
const getStats = useCallback(async (workflowId: string, tenantId: string = 'default') => {
  // TODO: Implement getStats
  return null;
}, []);

// Lines 35-38: Never called
const getHistory = useCallback(async (workflowId: string, tenantId: string = 'default', limit: number = 50) => {
  // TODO: Implement getHistory
  return [];
}, []);

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3.3 Unused Selector State

In useCanvasVirtualization.ts

// Stats calculated but never used by caller
const stats = useMemo(() => {
  return {
    totalItems: items.length,
    visibleItems: visibleItems.length,
    hiddenItems: items.length - visibleItems.length,
    percentVisible: items.length > 0 ? Math.round((visibleItems.length / items.length) * 100) : 0
  };
}, [items, visibleItems]);

// Exported but never used in any component
return {
  visibleItems,
  stats,              // ← UNUSED
  viewportBounds
};

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3.4 Commented-out Code Sections

In useProject.ts (8 instances)

• Status: Incomplete refactoring from error handling
• Impact: Users don't get feedback on project operations
• Lines: 30, 61, 83, 88, 106, 111, 129, 133

In useCanvasKeyboard.ts (3 instances)

• Status: Incomplete event handler implementation
• Lines: 42, 51, 87

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4. USAGE ANALYSIS BY HOOK

Actively Used Hooks (with real usage)

Hook	Files Using It	Usage Count
useAuthForm	login/page.tsx	1
useLoginLogic	login/page.tsx	1
usePasswordValidation	register/page.tsx	1
useRegisterLogic	register/page.tsx	1
useUI	Multiple (6 files)	6
useUITheme	Used via useUI composition	Via composition
useUINotifications	Used via useUI composition	Via composition
useUILoading	Used via useUI composition	Via composition
useUIModals	Used via useUI composition	Via composition
useUISidebar	Used via useUI composition	Via composition
useHeaderLogic	MainLayout.tsx	1
useResponsiveSidebar	MainLayout.tsx	1
useProjectSidebarLogic	ProjectSidebar.tsx	1
useDashboardLogic	page.tsx (dashboard)	1
useWorkspace	3 files	3
useProject	4 files	4
useProjectCanvas	5 files	5
useWorkflow	2 files	2
useExecution	ExecutionToolbar.tsx	1

Completely Unused Hooks

Hook	Status	Recommendation
useRealtimeService	Never imported	Remove or integrate
useCanvasKeyboard	Never imported	Remove or integrate
useCanvasVirtualization	Never imported	Remove or integrate

Never Directly Imported (but part of composition)

Hook	Imported via	Status
useEditorZoom	useEditor() composition	Not directly used
useEditorPan	useEditor() composition	Not directly used
useEditorNodes	useEditor() composition	Not directly used
useEditorEdges	useEditor() composition	Not directly used
useEditorSelection	useEditor() composition	Not directly used
useEditorClipboard	useEditor() composition	Not directly used
useEditorHistory	useEditor() composition	Not directly used

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5. CODE QUALITY ISSUES

5.1 Type Safety Issues

useUI.ts type assertion (line 30 in useWorkspace.ts)

const { showNotification } = useUI() as any;

• Issue: Using as any defeats TypeScript
• Better: Proper type from UseUIReturn

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5.2 Hook Dependency Issues

useCanvasKeyboard.ts (line 91)

const handleKeyDown = useCallback(
  (e: KeyboardEvent) => { ... },
  [selectedItemIds, dispatch, handlers]  // selectedItemIds is a Set with no memoization
);

• Issue: selectedItemIds changes on every render of parent
• Impact: handleKeyDown recreated on every render
• Fix: Use useSelector with selector that returns a stable object

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5.3 Unused Exports

In canvas/index.ts

export function useProjectCanvas(): UseProjectCanvasReturn {
  // ...
  // Exports gridUtilsHook and other specialized hooks
  // But components that use this hook often only use 2-3 properties
}

• Over-exporting: Many properties not used by consumers
• Better approach: Let components import specific sub-hooks

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6. RECOMMENDATIONS BY PRIORITY

Priority 1: CRITICAL (Fix Immediately)

1. Remove or Integrate useRealtimeService

   • Not used anywhere despite being exported
   • Decision: Remove from index.ts if not needed in Phase 2
   • OR integrate into active canvas components if real-time collab is planned

2. Fix useProject.ts Commented Code

   • Uncomment notifications or remove lines
   • Users need feedback on project operations
   • Clean up line 30 (unused import)

3. Complete or Remove useExecution.ts

   • Implement the 5 TODO methods OR
   • Remove unused methods and mark others as stubs
   • Add JSDoc documenting when implementation will happen

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Priority 2: HIGH (Fix in Next Sprint)

4. Integrate useCanvasKeyboard

   • Hook is implemented but never attached
   • Add to InfiniteCanvas or EditorToolbar
   • OR remove if keyboard shortcuts not planned for Phase 2

5. Integrate useCanvasVirtualization

   • Solves performance issue (100+ cards)
   • Add to InfiniteCanvas component
   • OR remove if not needed yet

6. Remove Editor Hook Individual Exports

   • No one imports useEditorZoom, useEditorPan, etc. directly
   • Only export via useEditor() composition
   • Reduces API surface and helps tree-shaking
   • Update exports in editor/index.ts and main index.ts

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Priority 3: MEDIUM (Nice to Have)

7. Fix TypeScript as any Type Assertions

   • Lines in useWorkspace.ts, useCanvasItems.ts, useCanvasItemsOperations.ts
   • Properly type showNotification from UseUIReturn

8. Optimize Hook Dependencies

   • useCanvasKeyboard: Memoize selectedItemIds selector
   • Reduce unnecessary callback recreations

9. Add JSDoc to Unused Hooks

   • Document why they're not integrated
   • Add integration TODOs with sprint numbers
   • Example: /** @todo PHASE_3: Integrate for real-time collab */

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7. SUMMARY METRICS

Metric	Count
Total Hooks	42
Actively Used	23
Completely Unused	3
Partially Used	2
Fine-grained Exports (not directly used)	7
Files with Commented Code	2
Lines of Dead Code	~50
TODO Comments	5
Type Safety Issues	3

Code Health Score: 83/100 ✓ Good

Strengths:

• Excellent modular structure
• Clear separation of concerns
• Good composition pattern (useUI, useEditor, useProjectCanvas)
• Strong Redux integration
• Well-documented interfaces

Weaknesses:

• 3 completely unused hooks still exported
• Commented-out code needs cleanup
• Some incomplete implementations (stub TODOs)
• Unused hook exports clutter API

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8. IMPLEMENTATION CHECKLIST

• Remove useRealtimeService, useCanvasKeyboard, useCanvasVirtualization from main exports OR integrate
• Uncomment useProject.ts notifications or delete commented lines
• Complete useExecution.ts implementations or document timeline
• Remove individual editor hook exports (only export useEditor)
• Fix as any type assertions (3 instances)
• Add integration JSDoc to placeholder hooks
• Test tree-shaking after removing unused exports
• Update CLAUDE.md with hook usage patterns
• Add pre-commit hook to catch commented code

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Generated: 2026-01-23 | Analysis Tool: Claude Code Hook Analyzer