Add ImGui WidgetIdRegistry
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docs/z3ed/IMGUI_ID_REFACTORING_SUMMARY.md
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docs/z3ed/IMGUI_ID_REFACTORING_SUMMARY.md
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# ImGui ID Management Analysis & Implementation Summary
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**Date**: October 2, 2025
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**Prepared for**: @scawful
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**Topic**: GUI widget ID refactoring for z3ed test automation
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## Executive Summary
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I've completed a comprehensive analysis of YAZE's ImGui ID management and created a complete refactoring plan to enable better test automation and eliminate duplicate ID issues.
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### Key Findings
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1. **100+ uses of `##` prefix** - Creates unnamed widgets that are hard to reference from tests
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2. **Potential ID conflicts** - Multiple widgets with same label (`##table`, `##canvas`) in different scopes
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3. **No centralized registry** - Test automation has no way to discover available widgets
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4. **Inconsistent naming** - No convention across editors
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### Proposed Solution
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**Hierarchical Widget ID System** with:
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- Automatic ID scoping via RAII helpers
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- Centralized widget registry for discovery
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- Stable, predictable widget paths
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- Machine-readable catalog for AI agents
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**Example transformation**:
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```cpp
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// Before
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if (ImGui::BeginChild("##Canvas", ...)) { }
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// After
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YAZE_WIDGET_SCOPE("Canvas");
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if (ImGui::BeginChild("OverworldMap", ...)) {
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YAZE_REGISTER_WIDGET(canvas, "OverworldMap");
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// Widget path: Overworld/Main/Canvas/canvas:OverworldMap
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}
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```
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## Deliverables Created
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### 1. Comprehensive Design Document
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**File**: `docs/z3ed/IMGUI_ID_MANAGEMENT_REFACTORING.md`
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**Contents**:
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- Current state analysis (100+ ##-prefixed widgets cataloged)
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- Hierarchical ID scheme design
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- 4-phase implementation plan (17-26 hours)
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- Testing strategy
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- Integration with z3ed agent workflow
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- Backwards compatibility approach
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**Key sections**:
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- Pattern analysis of existing code
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- Proposed naming convention: `<Editor>/<Tab>/<Section>/<WidgetType>:<Name>`
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- Benefits for AI-driven automation
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- Migration timeline and priorities
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### 2. Core Infrastructure Implementation
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**Files**:
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- `src/app/gui/widget_id_registry.h` (177 lines)
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- `src/app/gui/widget_id_registry.cc` (193 lines)
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**Features**:
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- `WidgetIdScope` - RAII helper for automatic ID push/pop
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- `WidgetIdRegistry` - Singleton registry with discovery methods
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- Thread-safe ID stack management
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- Pattern matching for widget lookup
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- YAML/JSON export for z3ed agent
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**API Highlights**:
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```cpp
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// RAII scoping
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YAZE_WIDGET_SCOPE("Overworld");
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YAZE_WIDGET_SCOPE("Canvas");
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// Widget registration
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YAZE_REGISTER_WIDGET(button, "DrawTile");
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// Discovery
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auto matches = registry.FindWidgets("*/button:*");
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std::string catalog = registry.ExportCatalog("yaml");
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```
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### 3. Documentation Updates
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**Updated**: `docs/z3ed/README.md`
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- Added new "Implementation Guides" section
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- Updated documentation structure
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- Cross-references to refactoring guide
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## Implementation Plan Summary
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### Phase 1: Core Infrastructure (2-3 hours) ⚡
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**Priority**: P0 - Immediate
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**Status**: Code complete, needs build integration
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**Tasks**:
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- ✅ Created WidgetIdScope RAII helper
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- ✅ Created WidgetIdRegistry with discovery
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- 📋 Add to CMake build system
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- 📋 Write unit tests
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### Phase 2: Overworld Editor Refactoring (3-4 hours)
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**Priority**: P0 - This week
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**Rationale**: Most complex, most tested, immediate value for E2E validation
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**Tasks**:
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- Add `YAZE_WIDGET_SCOPE` at function boundaries
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- Replace `##name` with meaningful names
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- Register all interactive widgets
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- Test with z3ed agent test
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### Phase 3: Test Harness Integration (1-2 hours)
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**Priority**: P0 - This week
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**Tasks**:
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- Add `DiscoverWidgets` RPC to proto
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- Update Click/Type/Assert handlers to use registry
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- Add widget suggestions on lookup failures
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- Test with grpcurl
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### Phase 4: Gradual Migration (4-6 hours per editor)
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**Priority**: P1-P2 - Next 2-3 weeks
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**Order**:
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1. Overworld Editor (P0)
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2. Dungeon Editor (P1)
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3. Palette Editor (P1)
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4. Graphics Editor (P1)
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5. Remaining editors (P2)
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## Benefits for z3ed Agent Workflow
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### 1. Stable Widget References
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```bash
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# Before: brittle string matching
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z3ed agent test --prompt "Click button:Overworld"
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# After: hierarchical path resolution
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z3ed agent test --prompt "Click the DrawTile tool"
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# Resolves to: Overworld/Main/Toolset/button:DrawTile
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```
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### 2. Widget Discovery for AI
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```bash
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z3ed agent describe --widgets --format yaml > docs/api/yaze-widgets.yaml
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```
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**Output includes**:
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- Full widget paths
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- Widget types (button, input, canvas, etc.)
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- Hierarchical context (editor, tab, section)
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- Available actions (click, type, drag, etc.)
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### 3. Automated Test Generation
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AI agents can:
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- Query widget catalog to understand UI structure
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- Generate commands with stable widget references
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- Use partial matching for fuzzy lookups
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- Get helpful suggestions when widgets not found
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## Integration with Existing Work
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### Complements IT-01 (ImGuiTestHarness)
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- Test harness can now discover widgets dynamically
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- Widget registry provides stable IDs for Click/Type/Assert RPCs
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- Better error messages with suggested alternatives
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### Enables IT-02 (CLI Agent Test)
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- Natural language prompts can resolve to exact widget paths
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- TestWorkflowGenerator can query available widgets
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- LLM can read widget catalog to understand UI
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### Supports E2E Validation
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- Fixes window detection issues with proper ID scoping
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- Eliminates duplicate ID warnings
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- Provides foundation for comprehensive GUI testing
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## Next Steps
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### Immediate (Tonight/Tomorrow) - 3 hours
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1. Add widget_id_registry to CMakeLists.txt
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2. Write unit tests for WidgetIdScope and WidgetIdRegistry
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3. Build and verify no compilation errors
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### This Week - 6 hours
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4. Refactor Overworld Editor (Phase 2)
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- Start with DrawToolset() and DrawOverworldCanvas()
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- Add scoping and registration
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- Test with existing E2E tests
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5. Integrate with test harness (Phase 3)
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- Add DiscoverWidgets RPC
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- Update Click handler to use registry
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- Test widget discovery via grpcurl
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### Next Week - 8 hours
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6. Continue editor migration (Dungeon, Palette, Graphics)
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7. Write comprehensive documentation
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8. Update z3ed guides with widget path examples
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## Success Metrics
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**Technical**:
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- ✅ Zero duplicate ImGui ID warnings
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- ✅ All interactive widgets registered and discoverable
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- ✅ Test automation can reference any widget
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- ✅ No performance regression
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**UX**:
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- ✅ Natural language prompts work reliably
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- ✅ Error messages suggest correct widget paths
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- ✅ AI agents can understand UI structure
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- ✅ Tests are maintainable across refactors
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## Risk Mitigation
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### Backwards Compatibility
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- Fallback mechanism for legacy string lookups
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- Gradual migration, no breaking changes
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- Both systems work during transition
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### Performance
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- Registry overhead minimal (hash map lookup)
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- Thread-local storage for ID stack
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- Lazy registration (only interactive widgets)
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### Maintenance
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- RAII helpers prevent scope leaks
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- Macros hide complexity from editor code
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- Centralized registry simplifies updates
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## Code Review Notes
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### Design Decisions
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**Why RAII for scoping?**
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- Automatic push/pop prevents mistakes
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- Matches ImGui's own ID scoping semantics
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- Clean, exception-safe
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**Why thread_local for ID stack?**
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- ImGui contexts are per-thread
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- Avoids race conditions
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- Allows multiple test instances
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**Why singleton for registry?**
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- Single source of truth
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- Easy access from any editor
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- Matches ImGui's singleton pattern
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**Why hierarchical paths?**
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- Natural organization (editor/tab/section/widget)
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- Easy to understand and remember
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- Supports partial matching
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- Mirrors filesystem conventions
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### Future Enhancements
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1. **Widget State Tracking**
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- Track enabled/disabled state
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- Track visibility
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- Track value changes
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2. **Action Recording**
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- Record user interactions
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- Generate tests from recordings
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- Replay for regression testing
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3. **Visual Tree Inspector**
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- ImGui debug window showing widget hierarchy
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- Click to highlight in UI
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- Real-time registration updates
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## References
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**Related z3ed Documents**:
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- [E6-z3ed-cli-design.md](E6-z3ed-cli-design.md) - Agent architecture
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- [IT-01-QUICKSTART.md](IT-01-QUICKSTART.md) - Test harness usage
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- [NEXT_PRIORITIES_OCT2.md](NEXT_PRIORITIES_OCT2.md) - Current priorities
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- [PROJECT_STATUS_OCT2.md](PROJECT_STATUS_OCT2.md) - Project status
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**ImGui Documentation**:
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- [ImGui FAQ - Widget IDs](https://github.com/ocornut/imgui/blob/master/docs/FAQ.md#q-how-can-i-have-multiple-widgets-with-the-same-label)
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- [ImGui Test Engine](https://github.com/ocornut/imgui_test_engine) - Reference implementation
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---
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**Prepared by**: GitHub Copilot
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**Review Status**: Ready for implementation
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**Estimated Total Effort**: 17-26 hours over 2-3 weeks
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**Immediate Priority**: Phase 1 build integration (3 hours)
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