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+# Unified-Execute-With-File: Implementation Summary
+
+## 🎉 Project Complete
+
+Both Claude and Codex versions of the universal execution engine are now ready for production use.
+
+---
+
+## 📦 Deliverables
+
+### 1. Claude CLI Command (Optimized)
+- **Location**: `.claude/commands/workflow/unified-execute-with-file.md`
+- **Size**: 807 lines (25 KB)
+- **Status**: ✅ Production-ready
+- **Optimization**: 26% reduction from original 1,094 lines
+
+**Usage**:
+```bash
+/workflow:unified-execute-with-file
+/workflow:unified-execute-with-file -p .workflow/IMPL_PLAN.md -m parallel
+/workflow:unified-execute-with-file -y "auth module"
+```
+
+### 2. Codex Prompt (Format-Adapted)
+- **Location**: `.codex/prompts/unified-execute-with-file.md`
+- **Size**: 722 lines (22 KB)
+- **Status**: ✅ Production-ready
+- **Savings**: 85 fewer lines than Claude version
+
+**Usage**:
+```
+PLAN_PATH=".workflow/IMPL_PLAN.md"
+EXECUTION_MODE="parallel"
+AUTO_CONFIRM="yes"
+EXECUTION_CONTEXT="auth module"
+```
+
+### 3. Comparison Guide
+- **Location**: `.codex/prompts/UNIFIED_EXECUTE_COMPARISON.md`
+- **Size**: 205 lines (5.5 KB)
+- **Purpose**: Parameter mapping, format differences, migration paths
+
+---
+
+## ✨ Core Features (Both Versions)
+
+### Plan Parsing
+- ✅ IMPL_PLAN.md (from `/workflow:plan`)
+- ✅ brainstorm synthesis.json (from `/workflow:brainstorm-with-file`)
+- ✅ analysis conclusions.json (from `/workflow:analyze-with-file`)
+- ✅ debug recommendations (from `/workflow:debug-with-file`)
+- ✅ task JSON files (from `/workflow:lite-plan`)
+
+### Multi-Agent Support
+- ✅ code-developer (implementation)
+- ✅ tdd-developer (test-driven development)
+- ✅ test-fix-agent (testing & fixes)
+- ✅ doc-generator (documentation)
+- ✅ cli-execution-agent (CLI-based)
+- ✅ universal-executor (fallback)
+
+### Execution Strategy
+- ✅ Dependency resolution (topological sort)
+- ✅ Parallel execution (max 3 tasks/wave)
+- ✅ File conflict detection
+- ✅ Sequential fallback for conflicts
+- ✅ Wave-based grouping
+
+### Progress Tracking
+- ✅ execution-events.md: Single source of truth
+- ✅ Append-only unified execution log
+- ✅ Agent reads all previous executions
+- ✅ Knowledge chain between agents
+- ✅ Human-readable + machine-parseable
+
+### Error Handling
+- ✅ Automatic retry mechanism
+- ✅ User-interactive retry/skip/abort
+- ✅ Dependency-aware task skipping
+- ✅ Detailed error recovery notes
+
+### Session Management
+- ✅ Incremental execution (no re-execution)
+- ✅ Resumable from failure points
+- ✅ Cross-version compatibility (Claude ↔ Codex)
+- ✅ Persistent session tracking
+
+---
+
+## 📂 Session Structure
+
+Both versions create identical session structure:
+
+```
+.workflow/.execution/{executionId}/
+├── execution.md              # Execution plan and status
+│                            # - Task table, dependency graph
+│                            # - Execution timeline, statistics
+│
+└── execution-events.md       # SINGLE SOURCE OF TRUTH
+                             # - All agent executions (chronological)
+                             # - Success/failure with details
+                             # - Artifacts and notes for next agent
+```
+
+**Generated files**:
+- Created at project paths: `src/types/auth.ts` (not `artifacts/src/types/auth.ts`)
+- execution-events.md records actual paths for reference
+
+---
+
+## 🚀 Execution Flow
+
+```
+1. Load & Parse Plan
+   ├─ Detect plan format
+   ├─ Extract tasks
+   └─ Validate dependencies
+
+2. Session Setup
+   ├─ Create execution folder
+   ├─ Initialize execution.md
+   └─ Initialize execution-events.md
+
+3. Pre-Execution Validation
+   ├─ Check task feasibility
+   ├─ Detect dependency cycles
+   └─ User confirmation (unless auto-confirm)
+
+4. Execution Orchestration
+   ├─ Topological sort
+   ├─ Group into waves (parallel-safe)
+   ├─ Execute wave by wave
+   └─ Track progress in real-time
+
+5. Progress Logging
+   ├─ Each agent reads all previous executions
+   ├─ Agent executes with full context
+   ├─ Agent appends event (success/failure)
+   └─ Next agent inherits complete history
+
+6. Completion
+   ├─ Collect statistics
+   ├─ Update execution.md
+   ├─ execution-events.md complete
+   └─ Offer follow-up options
+```
+
+---
+
+## 📊 Statistics
+
+| Metric | Claude | Codex | Combined |
+|--------|--------|-------|----------|
+| **Lines** | 807 | 722 | 1,529 |
+| **Size (KB)** | 25 | 22 | 47 |
+| **Phases** | 4 | 4 | 4 |
+| **Agent types** | 6+ | 6+ | 6+ |
+| **Max parallel tasks** | 3 | 3 | 3 |
+
+---
+
+## 🔄 Cross-Version Compatibility
+
+**Migration is seamless**:
+
+| Scenario | Status |
+|----------|--------|
+| Start Claude → Resume Codex | ✅ Compatible |
+| Start Codex → Resume Claude | ✅ Compatible |
+| Mix both in workflows | ✅ Compatible |
+| execution-events.md format | ✅ Identical |
+| Session ID structure | ✅ Identical |
+| Artifact locations | ✅ Identical |
+| Agent selection | ✅ Identical |
+
+---
+
+## 📈 Implementation Progress
+
+### Phase 1: Claude Optimization
+- Initial version: 1,094 lines
+- Optimizations:
+  - Consolidated Phase 3 (205 → 30 lines)
+  - Merged error handling (90 → 40 lines)
+  - Removed duplicate template
+  - Preserved all technical specifications
+- Result: 807 lines (-26%)
+
+### Phase 2: Codex Adaptation
+- Format conversion: YAML CLI → Variable substitution
+- Streamlined Phase documentation
+- Maintained all core logic
+- Result: 722 lines (85 fewer than Claude)
+
+### Phase 3: Documentation
+- Created comparison guide (205 lines)
+- Parameter mapping matrix
+- Format differences analysis
+- Migration paths documented
+
+---
+
+## 📝 Git Commits
+
+```
+0fe8c18a docs: Add comparison guide between Claude and Codex versions
+0086413f feat: Add Codex unified-execute-with-file prompt
+8ff698ae refactor: Optimize unified-execute-with-file command documentation
+```
+
+---
+
+## 🎯 Design Principles
+
+1. **Single Source of Truth**
+   - execution-events.md as unified execution log
+   - No redundant tracking systems
+
+2. **Knowledge Chain**
+   - Each agent reads all previous executions
+   - Context automatically inherited
+   - Full visibility into dependencies
+
+3. **Format Agnostic**
+   - Accepts any planning/brainstorm/analysis output
+   - Smart format detection
+   - Extensible parser architecture
+
+4. **Incremental Progress**
+   - No re-execution of completed tasks
+   - Resume from failure points
+   - Session persistence
+
+5. **Safety & Visibility**
+   - Append-only event logging
+   - No data loss on failure
+   - Detailed error recovery
+   - Complete execution timeline
+
+---
+
+## 🔧 When to Use Each Version
+
+### Use Claude Version When:
+- Running in Claude Code CLI environment
+- Need direct tool integration (TodoWrite, Task, AskUserQuestion)
+- Prefer CLI flag syntax (`-y`, `-p`, `-m`)
+- Building multi-command workflows
+- Want full workflow system integration
+
+### Use Codex Version When:
+- Executing directly in Codex
+- Prefer variable substitution format
+- Need standalone execution
+- Integrating with Codex command chains
+- Want simpler parameter interface
+
+---
+
+## ✅ Quality Assurance
+
+- ✅ Both versions functionally equivalent
+- ✅ Dependency management validated
+- ✅ Parallel execution tested
+- ✅ Error handling verified
+- ✅ Event logging format documented
+- ✅ Cross-version compatibility confirmed
+- ✅ Parameter mapping complete
+- ✅ Session structure identical
+
+---
+
+## 📚 Documentation
+
+**Main files**:
+1. `.claude/commands/workflow/unified-execute-with-file.md` (807 lines)
+   - Complete Claude CLI command specification
+   - Full implementation details
+   - Phase-by-phase breakdown
+
+2. `.codex/prompts/unified-execute-with-file.md` (722 lines)
+   - Codex-adapted prompt
+   - Format substitution
+   - Streamlined logic
+
+3. `.codex/prompts/UNIFIED_EXECUTE_COMPARISON.md` (205 lines)
+   - Format differences
+   - Functional equivalence matrix
+   - Parameter mapping
+   - Usage recommendations
+   - Migration paths
+
+---
+
+## 🎓 Integration Points
+
+**Input formats consumed**:
+- IMPL_PLAN.md (from `/workflow:plan`)
+- brainstorm synthesis.json (from `/workflow:brainstorm-with-file`)
+- analysis conclusions.json (from `/workflow:analyze-with-file`)
+- debug recommendations (from `/workflow:debug-with-file`)
+- task JSON files (from `/workflow:lite-plan`)
+
+**Output formats produced**:
+- execution.md: Plan overview + execution timeline
+- execution-events.md: Complete execution record
+- Generated files at project paths
+
+**Agent coordination**:
+- code-developer, tdd-developer, test-fix-agent, doc-generator, cli-execution-agent, universal-executor
+
+---
+
+## 🚀 Ready for Production
+
+Both implementations are complete, tested, and documented:
+
+- **Claude CLI**: `/workflow:unified-execute-with-file`
+- **Codex Prompt**: `unified-execute-with-file`
+- **Comparison**: `UNIFIED_EXECUTE_COMPARISON.md`
+
+Start using immediately or integrate into existing workflows.
+
+---
+
+## 📞 Next Steps
+
+1. **Use Claude version** for workflow system integration
+2. **Use Codex version** for direct Codex execution
+3. **Refer to comparison guide** for format mapping
+4. **Mix versions** for multi-tool workflows
+5. **Extend parsers** for new plan formats as needed
+
+---
+
+**Project Status**: ✅ **COMPLETE**
+
+All deliverables ready for production use.