diff --git a/.claude/commands/workflow/plan.md b/.claude/commands/workflow/plan.md
index 1e6831fc..d3bd2624 100644
--- a/.claude/commands/workflow/plan.md
+++ b/.claude/commands/workflow/plan.md
@@ -22,11 +22,19 @@ This workflow runs **fully autonomously** once triggered. Phase 3 (conflict reso
 4. **Phase 3 executes** (optional, if conflict_risk ≥ medium) → Conflict resolution → Auto-continues
 5. **Phase 4 executes** → Task generation (task-generate-agent) → Reports final summary
 
+**Task Attachment Model**:
+- SlashCommand invocation **expands workflow** by attaching sub-tasks to current TodoWrite
+- When a sub-command is invoked (e.g., `/workflow:tools:context-gather`), its internal tasks are attached to the orchestrator's TodoWrite
+- Orchestrator **executes these attached tasks** sequentially
+- After completion, attached tasks are **collapsed** back to high-level phase summary
+- This is **task expansion**, not external delegation
+
 **Auto-Continue Mechanism**:
-- TodoList tracks current phase status
+- TodoList tracks current phase status and dynamically manages task attachment/collapse
 - When each phase finishes executing, automatically execute next pending phase
 - All phases run autonomously without user interaction (clarification handled in brainstorm phase)
 - Progress updates shown at each phase for visibility
+- **⚠️ CONTINUOUS EXECUTION** - Do not stop until all phases complete
 
 ## Core Rules
 
@@ -34,8 +42,9 @@ This workflow runs **fully autonomously** once triggered. Phase 3 (conflict reso
 2. **No Preliminary Analysis**: Do not read files, analyze structure, or gather context before Phase 1
 3. **Parse Every Output**: Extract required data from each command/agent output for next phase
 4. **Auto-Continue via TodoList**: Check TodoList status to execute next pending phase automatically
-5. **Track Progress**: Update TodoWrite when each phase finishes executing
-6. **Agent Delegation**: Phase 3 uses cli-execution-agent for autonomous intelligent analysis
+5. **Track Progress**: Update TodoWrite dynamically with task attachment/collapse pattern
+6. **Task Attachment Model**: SlashCommand invocation **attaches** sub-tasks to current workflow. Orchestrator **executes** these attached tasks itself, then **collapses** them after completion
+7. **⚠️ CRITICAL: DO NOT STOP**: Continuous multi-phase workflow. After executing all attached tasks, immediately collapse them and execute next phase
 
 ## 5-Phase Execution
 
@@ -84,9 +93,11 @@ CONTEXT: Existing user database schema, REST API endpoints
 - Context package path extracted
 - File exists and is valid JSON
 
-**TodoWrite**: Mark phase 2 completed, phase 3 in_progress
+**TodoWrite**: Mark phase 2 completed, phase 3/4 in_progress (depending on conflict_risk)
 
-**After Phase 2**: Return to user showing Phase 2 results, then auto-continue to Phase 3
+**Task Attachment**: SlashCommand invocation attaches 3 context-gather sub-tasks, executes them, then collapses to phase summary (see TodoWrite Pattern section for details)
+
+**After Phase 2**: Return to user showing Phase 2 results, then auto-continue to Phase 3/4 (depending on conflict_risk)
 
 ---
 
@@ -112,7 +123,9 @@ CONTEXT: Existing user database schema, REST API endpoints
 - If conflict_risk is "none" or "low", skip directly to Phase 3.5
 - Display: "No significant conflicts detected, proceeding to clarification"
 
-**TodoWrite**: Mark phase 3 completed (if executed) or skipped, phase 3.5 in_progress
+**TodoWrite**: If executed, mark phase 3 completed, phase 3.5/4 in_progress
+
+**Task Attachment**: If conflict_risk ≥ medium, SlashCommand invocation attaches 3 conflict-resolution sub-tasks, executes them, then collapses to phase summary (see TodoWrite Pattern section for details)
 
 **After Phase 3**: Return to user showing conflict resolution results (if executed) and selected strategies, then auto-continue to Phase 3.5
 
@@ -173,7 +186,35 @@ SlashCommand(command="/workflow:tools:task-generate-agent --session [sessionId]
 - `.workflow/[sessionId]/.task/IMPL-*.json` exists (at least one)
 - `.workflow/[sessionId]/TODO_LIST.md` exists
 
-**TodoWrite**: Mark phase 4 completed
+<!-- TodoWrite: When task-generate-agent invoked, INSERT 3 task-generate-agent tasks -->
+
+**TodoWrite Update (Phase 4 SlashCommand invoked - tasks attached)**:
+```json
+[
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Phase 4.1: Discovery - analyze requirements (task-generate-agent)", "status": "in_progress", "activeForm": "Analyzing requirements"},
+  {"content": "Phase 4.2: Planning - design tasks (task-generate-agent)", "status": "pending", "activeForm": "Designing tasks"},
+  {"content": "Phase 4.3: Output - generate JSONs (task-generate-agent)", "status": "pending", "activeForm": "Generating task JSONs"}
+]
+```
+
+**Note**: SlashCommand invocation **attaches** task-generate-agent's 3 tasks. Orchestrator **executes** these tasks.
+
+**Next Action**: Tasks attached → **Execute Phase 4.1-4.3** sequentially
+
+<!-- TodoWrite: After Phase 4 tasks complete, REMOVE Phase 4.1-4.3, restore to orchestrator view -->
+
+**TodoWrite Update (Phase 4 completed - tasks collapsed)**:
+```json
+[
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute task generation", "status": "completed", "activeForm": "Executing task generation"}
+]
+```
+
+**Note**: Phase 4 tasks completed and collapsed to summary.
 
 **Return to User**:
 ```
@@ -192,37 +233,92 @@ Quality Gate: Consider running /workflow:action-plan-verify to catch issues earl
 ## TodoWrite Pattern
 
 ```javascript
-// Initialize (before Phase 1)
-// Note: Phase 3 todo only added dynamically after Phase 2 if conflict_risk ≥ medium
+// ⚠️ CRITICAL: Dynamic TodoWrite task attachment strategy:
+//
+// **Key Concept**: SlashCommand invocation ATTACHES tasks to current workflow.
+// Orchestrator EXECUTES these attached tasks itself, then COLLAPSES them.
+//
+// 1. INITIAL STATE: 3 orchestrator-level tasks (or 4 if conflict_risk ≥ medium added later)
 TodoWrite({todos: [
   {"content": "Execute session discovery", "status": "in_progress", "activeForm": "Executing session discovery"},
   {"content": "Execute context gathering", "status": "pending", "activeForm": "Executing context gathering"},
-  // Phase 3 todo added dynamically after Phase 2 if conflict_risk ≥ medium
   {"content": "Execute task generation", "status": "pending", "activeForm": "Executing task generation"}
 ]})
 
-// After Phase 2 (if conflict_risk ≥ medium, insert Phase 3 todo)
+// 2. PHASE 2 SlashCommand INVOCATION:
+//    - SlashCommand(/workflow:tools:context-gather) ATTACHES 3 tasks
+//    - TodoWrite expands to: Phase 1 (completed) + 3 context-gather tasks + Phase 4
+//    - Orchestrator EXECUTES these 3 tasks sequentially (Phase 2.1 → 2.2 → 2.3)
+//    - First attached task marked as in_progress
 TodoWrite({todos: [
   {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
-  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
-  {"content": "Resolve conflicts and apply fixes", "status": "in_progress", "activeForm": "Resolving conflicts"},
+  {"content": "Phase 2.1: Analyze codebase structure (context-gather)", "status": "in_progress", "activeForm": "Analyzing codebase structure"},
+  {"content": "Phase 2.2: Identify integration points (context-gather)", "status": "pending", "activeForm": "Identifying integration points"},
+  {"content": "Phase 2.3: Generate context package (context-gather)", "status": "pending", "activeForm": "Generating context package"},
   {"content": "Execute task generation", "status": "pending", "activeForm": "Executing task generation"}
 ]})
 
-// After Phase 2 (if conflict_risk is none/low, skip Phase 3, go directly to Phase 4)
+// 3. PHASE 2 TASKS COMPLETED:
+//    - All 3 context-gather tasks executed and completed
+//    - COLLAPSE completed tasks into Phase 2 summary
+//    - TodoWrite becomes: Phase 1-2 (completed) + Phase 4
 TodoWrite({todos: [
   {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
   {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
-  {"content": "Execute task generation", "status": "in_progress", "activeForm": "Executing task generation"}
+  {"content": "Execute task generation", "status": "pending", "activeForm": "Executing task generation"}
 ]})
 
-// After Phase 3 (if executed), continue to Phase 4
+// 4. CONDITIONAL: IF conflict_risk ≥ medium → PHASE 3 SlashCommand INVOCATION:
+//    - SlashCommand(/workflow:tools:conflict-resolution) ATTACHES 3 tasks
+//    - TodoWrite expands to: Phase 1-2 (completed) + 3 conflict-resolution tasks + Phase 4
+//    - Orchestrator EXECUTES these 3 tasks sequentially (Phase 3.1 → 3.2 → 3.3)
+TodoWrite({todos: [
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Phase 3.1: Detect conflicts with CLI analysis (conflict-resolution)", "status": "in_progress", "activeForm": "Detecting conflicts"},
+  {"content": "Phase 3.2: Present conflicts to user (conflict-resolution)", "status": "pending", "activeForm": "Presenting conflicts"},
+  {"content": "Phase 3.3: Apply resolution strategies (conflict-resolution)", "status": "pending", "activeForm": "Applying resolution strategies"},
+  {"content": "Execute task generation", "status": "pending", "activeForm": "Executing task generation"}
+]})
+
+// 5. PHASE 3 TASKS COMPLETED (if executed):
+//    - All 3 conflict-resolution tasks executed and completed
+//    - COLLAPSE completed tasks into Phase 3 summary
+//    - TodoWrite returns to: Phase 1-3 (completed) + Phase 4
 TodoWrite({todos: [
   {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
   {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
   {"content": "Resolve conflicts and apply fixes", "status": "completed", "activeForm": "Resolving conflicts"},
-  {"content": "Execute task generation", "status": "in_progress", "activeForm": "Executing task generation"}
+  {"content": "Execute task generation", "status": "pending", "activeForm": "Executing task generation"}
 ]})
+
+// 6. PHASE 4 SlashCommand INVOCATION:
+//    - SlashCommand(/workflow:tools:task-generate-agent) ATTACHES 3 tasks
+//    - TodoWrite expands to: Phase 1-2-3 (completed) + 3 task-generate-agent tasks
+//    - Orchestrator EXECUTES these 3 tasks sequentially (Phase 4.1 → 4.2 → 4.3)
+TodoWrite({todos: [
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Phase 4.1: Discovery - analyze requirements (task-generate-agent)", "status": "in_progress", "activeForm": "Analyzing requirements"},
+  {"content": "Phase 4.2: Planning - design tasks (task-generate-agent)", "status": "pending", "activeForm": "Designing tasks"},
+  {"content": "Phase 4.3: Output - generate JSONs (task-generate-agent)", "status": "pending", "activeForm": "Generating task JSONs"}
+]})
+
+// 7. PHASE 4 TASKS COMPLETED:
+//    - All 3 task-generate-agent tasks executed and completed
+//    - COLLAPSE completed tasks into Phase 4 summary
+//    - Final state: All orchestrator tasks completed
+TodoWrite({todos: [
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute task generation", "status": "completed", "activeForm": "Executing task generation"}
+]})
+
+// Benefits:
+// ✓ Real-time visibility into attached tasks during execution
+// ✓ Clean orchestrator-level summary after tasks complete
+// ✓ Clear mental model: SlashCommand = attach tasks, not delegate work
+// ✓ Dynamic attachment/collapse maintains clarity
 ```
 
 ## Input Processing
@@ -304,6 +400,55 @@ Return summary to user
 - **Traceability**: Easy to track what was requested
 - **Precision**: Better context gathering and analysis
 
+## Execution Flow Diagram
+
+```
+User triggers: /workflow:plan "Build authentication system"
+  ↓
+[TodoWrite Init] 3 orchestrator-level tasks
+  ↓
+Phase 1: Session Discovery
+  → sessionId extracted
+  ↓
+Phase 2: Context Gathering (SlashCommand invoked)
+  → ATTACH 3 tasks: ← ATTACHED
+    - Phase 2.1: Analyze codebase structure
+    - Phase 2.2: Identify integration points
+    - Phase 2.3: Generate context package
+  → Execute Phase 2.1-2.3
+  → COLLAPSE tasks ← COLLAPSED
+  → contextPath + conflict_risk extracted
+  ↓
+Conditional Branch: Check conflict_risk
+  ├─ IF conflict_risk ≥ medium:
+  │   Phase 3: Conflict Resolution (SlashCommand invoked)
+  │     → ATTACH 3 tasks: ← ATTACHED
+  │       - Phase 3.1: Detect conflicts with CLI analysis
+  │       - Phase 3.2: Present conflicts to user
+  │       - Phase 3.3: Apply resolution strategies
+  │     → Execute Phase 3.1-3.3
+  │     → COLLAPSE tasks ← COLLAPSED
+  │
+  └─ ELSE: Skip Phase 3, proceed to Phase 4
+  ↓
+Phase 4: Task Generation (SlashCommand invoked)
+  → ATTACH 3 tasks: ← ATTACHED
+    - Phase 4.1: Discovery - analyze requirements
+    - Phase 4.2: Planning - design tasks
+    - Phase 4.3: Output - generate JSONs
+  → Execute Phase 4.1-4.3
+  → COLLAPSE tasks ← COLLAPSED
+  → Outputs: IMPL_PLAN.md, IMPL-*.json, TODO_LIST.md
+  ↓
+Return summary to user
+```
+
+**Key Points**:
+- **← ATTACHED**: Sub-tasks attached to TodoWrite when SlashCommand invoked
+- **← COLLAPSED**: Sub-tasks collapsed to summary after completion
+- **Conditional Branch**: Phase 3 only executes if conflict_risk ≥ medium
+- **Continuous Flow**: No user intervention between phases
+
 ## Error Handling
 
 - **Parsing Failure**: If output parsing fails, retry command once, then report error
diff --git a/.claude/commands/workflow/tdd-plan.md b/.claude/commands/workflow/tdd-plan.md
index 0a7ab271..73e10146 100644
--- a/.claude/commands/workflow/tdd-plan.md
+++ b/.claude/commands/workflow/tdd-plan.md
@@ -9,21 +9,35 @@ allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(*)
 
 ## Coordinator Role
 
-**This command is a pure orchestrator**: Execute 5 slash commands in sequence, parse outputs, pass context, and ensure complete TDD workflow creation.
+**This command is a pure orchestrator**: Execute 6 slash commands in sequence, parse outputs, pass context, and ensure complete TDD workflow creation with Red-Green-Refactor task generation.
 
 **Execution Modes**:
 - **Agent Mode** (default): Use `/workflow:tools:task-generate-tdd` (autonomous agent-driven)
 - **CLI Mode** (`--cli-execute`): Use `/workflow:tools:task-generate-tdd --cli-execute` (Gemini/Qwen)
 
+**Task Attachment Model**:
+- SlashCommand invocation **expands workflow** by attaching sub-tasks to current TodoWrite
+- When a sub-command is invoked (e.g., `/workflow:tools:test-context-gather`), its internal tasks are attached to the orchestrator's TodoWrite
+- Orchestrator **executes these attached tasks** sequentially
+- After completion, attached tasks are **collapsed** back to high-level phase summary
+- This is **task expansion**, not external delegation
+
+**Auto-Continue Mechanism**:
+- TodoList tracks current phase status and dynamically manages task attachment/collapse
+- When each phase finishes executing, automatically execute next pending phase
+- All phases run autonomously without user interaction
+- **⚠️ CONTINUOUS EXECUTION** - Do not stop until all phases complete
+
 ## Core Rules
 
 1. **Start Immediately**: First action is TodoWrite initialization, second action is Phase 1 execution
 2. **No Preliminary Analysis**: Do not read files before Phase 1
 3. **Parse Every Output**: Extract required data for next phase
 4. **Auto-Continue via TodoList**: Check TodoList status to execute next pending phase automatically
-5. **Track Progress**: Update TodoWrite when each phase finishes executing
+5. **Track Progress**: Update TodoWrite dynamically with task attachment/collapse pattern
 6. **TDD Context**: All descriptions include "TDD:" prefix
-7. **Quality Gate**: Phase 4 conflict resolution (optional, auto-triggered) validates compatibility before task generation
+7. **Task Attachment Model**: SlashCommand invocation **attaches** sub-tasks to current workflow. Orchestrator **executes** these attached tasks itself, then **collapses** them after completion
+8. **⚠️ CRITICAL: DO NOT STOP**: Continuous multi-phase workflow. After executing all attached tasks, immediately collapse them and execute next phase
 
 ## 6-Phase Execution (with Conflict Resolution)
 
@@ -85,9 +99,41 @@ TEST_FOCUS: [Test scenarios]
 - Prevents duplicate test creation
 - Enables integration with existing tests
 
-**TodoWrite**: Mark phase 3 completed, phase 4 in_progress
+<!-- TodoWrite: When test-context-gather invoked, INSERT 3 test-context-gather tasks -->
 
-**After Phase 3**: Return to user showing test coverage results, then auto-continue to Phase 4
+**TodoWrite Update (Phase 3 SlashCommand invoked - tasks attached)**:
+```json
+[
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Phase 3.1: Detect test framework and conventions (test-context-gather)", "status": "in_progress", "activeForm": "Detecting test framework"},
+  {"content": "Phase 3.2: Analyze existing test coverage (test-context-gather)", "status": "pending", "activeForm": "Analyzing test coverage"},
+  {"content": "Phase 3.3: Identify coverage gaps (test-context-gather)", "status": "pending", "activeForm": "Identifying coverage gaps"},
+  {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
+  {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
+]
+```
+
+**Note**: SlashCommand invocation **attaches** test-context-gather's 3 tasks. Orchestrator **executes** these tasks.
+
+**Next Action**: Tasks attached → **Execute Phase 3.1-3.3** sequentially
+
+<!-- TodoWrite: After Phase 3 tasks complete, REMOVE Phase 3.1-3.3, restore to orchestrator view -->
+
+**TodoWrite Update (Phase 3 completed - tasks collapsed)**:
+```json
+[
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
+  {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
+  {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
+]
+```
+
+**Note**: Phase 3 tasks completed and collapsed to summary.
+
+**After Phase 3**: Return to user showing test coverage results, then auto-continue to Phase 4/5 (depending on conflict_risk)
 
 ---
 
@@ -113,7 +159,41 @@ TEST_FOCUS: [Test scenarios]
 - If conflict_risk is "none" or "low", skip directly to Phase 5
 - Display: "No significant conflicts detected, proceeding to TDD task generation"
 
-**TodoWrite**: Mark phase 4 completed (if executed) or skipped, phase 5 in_progress
+<!-- TodoWrite: If conflict_risk ≥ medium, INSERT 3 conflict-resolution tasks -->
+
+**TodoWrite Update (Phase 4 SlashCommand invoked - tasks attached, if conflict_risk ≥ medium)**:
+```json
+[
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
+  {"content": "Phase 4.1: Detect conflicts with CLI analysis (conflict-resolution)", "status": "in_progress", "activeForm": "Detecting conflicts"},
+  {"content": "Phase 4.2: Present conflicts to user (conflict-resolution)", "status": "pending", "activeForm": "Presenting conflicts"},
+  {"content": "Phase 4.3: Apply resolution strategies (conflict-resolution)", "status": "pending", "activeForm": "Applying resolution strategies"},
+  {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
+  {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
+]
+```
+
+**Note**: SlashCommand invocation **attaches** conflict-resolution's 3 tasks. Orchestrator **executes** these tasks.
+
+**Next Action**: Tasks attached → **Execute Phase 4.1-4.3** sequentially
+
+<!-- TodoWrite: After Phase 4 tasks complete, REMOVE Phase 4.1-4.3, restore to orchestrator view -->
+
+**TodoWrite Update (Phase 4 completed - tasks collapsed)**:
+```json
+[
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
+  {"content": "Execute conflict resolution", "status": "completed", "activeForm": "Executing conflict resolution"},
+  {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
+  {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
+]
+```
+
+**Note**: Phase 4 tasks completed and collapsed to summary.
 
 **After Phase 4**: Return to user showing conflict resolution results (if executed) and selected strategies, then auto-continue to Phase 5
 
@@ -145,6 +225,40 @@ TEST_FOCUS: [Test scenarios]
 - IMPL_PLAN.md contains workflow_type: "tdd" in frontmatter
 - Task count ≤10 (compliance with task limit)
 
+<!-- TodoWrite: When task-generate-tdd invoked, INSERT 3 task-generate-tdd tasks -->
+
+**TodoWrite Update (Phase 5 SlashCommand invoked - tasks attached)**:
+```json
+[
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
+  {"content": "Phase 5.1: Discovery - analyze TDD requirements (task-generate-tdd)", "status": "in_progress", "activeForm": "Analyzing TDD requirements"},
+  {"content": "Phase 5.2: Planning - design Red-Green-Refactor cycles (task-generate-tdd)", "status": "pending", "activeForm": "Designing TDD cycles"},
+  {"content": "Phase 5.3: Output - generate IMPL tasks with internal TDD phases (task-generate-tdd)", "status": "pending", "activeForm": "Generating TDD tasks"},
+  {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
+]
+```
+
+**Note**: SlashCommand invocation **attaches** task-generate-tdd's 3 tasks. Orchestrator **executes** these tasks. Each generated IMPL task will contain internal Red-Green-Refactor cycle.
+
+**Next Action**: Tasks attached → **Execute Phase 5.1-5.3** sequentially
+
+<!-- TodoWrite: After Phase 5 tasks complete, REMOVE Phase 5.1-5.3, restore to orchestrator view -->
+
+**TodoWrite Update (Phase 5 completed - tasks collapsed)**:
+```json
+[
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
+  {"content": "Execute TDD task generation", "status": "completed", "activeForm": "Executing TDD task generation"},
+  {"content": "Validate TDD structure", "status": "in_progress", "activeForm": "Validating TDD structure"}
+]
+```
+
+**Note**: Phase 5 tasks completed and collapsed to summary. Each generated IMPL task contains complete Red-Green-Refactor cycle internally.
+
 ### Phase 6: TDD Structure Validation & Action Plan Verification (RECOMMENDED)
 **Internal validation first, then recommend external verification**
 
@@ -203,44 +317,146 @@ Quality Gate: Consider running /workflow:action-plan-verify to validate TDD task
 ## TodoWrite Pattern
 
 ```javascript
-// Initialize (Phase 4 added dynamically after Phase 3 if conflict_risk ≥ medium)
+// ⚠️ CRITICAL: Dynamic TodoWrite task attachment strategy for TDD workflow:
+//
+// **Key Concept**: SlashCommand invocation ATTACHES tasks to current workflow.
+// Orchestrator EXECUTES these attached tasks itself, then COLLAPSES them.
+// TDD-specific: Generated IMPL tasks contain internal Red-Green-Refactor cycles.
+//
+// 1. INITIAL STATE: 5 orchestrator-level tasks (or 6 if conflict_risk ≥ medium added later)
 TodoWrite({todos: [
   {"content": "Execute session discovery", "status": "in_progress", "activeForm": "Executing session discovery"},
   {"content": "Execute context gathering", "status": "pending", "activeForm": "Executing context gathering"},
   {"content": "Execute test coverage analysis", "status": "pending", "activeForm": "Executing test coverage analysis"},
-  // Phase 4 todo added dynamically after Phase 3 if conflict_risk ≥ medium
   {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
   {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
 ]})
 
-// After Phase 3 (if conflict_risk ≥ medium, insert Phase 4 todo)
+// 2. PHASE 3 SlashCommand INVOCATION (test-context-gather):
+//    - SlashCommand(/workflow:tools:test-context-gather) ATTACHES 3 tasks
+//    - Orchestrator EXECUTES these 3 tasks sequentially
 TodoWrite({todos: [
   {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
   {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
-  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
-  {"content": "Execute conflict resolution", "status": "in_progress", "activeForm": "Executing conflict resolution"},
+  {"content": "Phase 3.1: Detect test framework and conventions (test-context-gather)", "status": "in_progress", "activeForm": "Detecting test framework"},
+  {"content": "Phase 3.2: Analyze existing test coverage (test-context-gather)", "status": "pending", "activeForm": "Analyzing test coverage"},
+  {"content": "Phase 3.3: Identify coverage gaps (test-context-gather)", "status": "pending", "activeForm": "Identifying coverage gaps"},
   {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
   {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
 ]})
 
-// After Phase 3 (if conflict_risk is none/low, skip Phase 4, go directly to Phase 5)
+// 3. PHASE 3 TASKS COMPLETED:
+//    - COLLAPSE completed tasks into Phase 3 summary
 TodoWrite({todos: [
   {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
   {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
   {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
-  {"content": "Execute TDD task generation", "status": "in_progress", "activeForm": "Executing TDD task generation"},
+  {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
   {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
 ]})
 
-// After Phase 4 (if executed), continue to Phase 5
+// 4. CONDITIONAL: IF conflict_risk ≥ medium → PHASE 4 SlashCommand INVOCATION:
+//    - SlashCommand(/workflow:tools:conflict-resolution) ATTACHES 3 tasks
+TodoWrite({todos: [
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
+  {"content": "Phase 4.1: Detect conflicts with CLI analysis (conflict-resolution)", "status": "in_progress", "activeForm": "Detecting conflicts"},
+  {"content": "Phase 4.2: Present conflicts to user (conflict-resolution)", "status": "pending", "activeForm": "Presenting conflicts"},
+  {"content": "Phase 4.3: Apply resolution strategies (conflict-resolution)", "status": "pending", "activeForm": "Applying resolution strategies"},
+  {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
+  {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
+]})
+
+// 5. PHASE 4 TASKS COMPLETED (if executed):
+//    - COLLAPSE completed tasks into Phase 4 summary
 TodoWrite({todos: [
   {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
   {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
   {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
   {"content": "Execute conflict resolution", "status": "completed", "activeForm": "Executing conflict resolution"},
-  {"content": "Execute TDD task generation", "status": "in_progress", "activeForm": "Executing TDD task generation"},
+  {"content": "Execute TDD task generation", "status": "pending", "activeForm": "Executing TDD task generation"},
   {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
 ]})
+
+// 6. PHASE 5 SlashCommand INVOCATION (task-generate-tdd):
+//    - SlashCommand(/workflow:tools:task-generate-tdd) ATTACHES 3 tasks
+//    - Generates IMPL tasks with internal Red-Green-Refactor cycles
+TodoWrite({todos: [
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
+  {"content": "Phase 5.1: Discovery - analyze TDD requirements (task-generate-tdd)", "status": "in_progress", "activeForm": "Analyzing TDD requirements"},
+  {"content": "Phase 5.2: Planning - design Red-Green-Refactor cycles (task-generate-tdd)", "status": "pending", "activeForm": "Designing TDD cycles"},
+  {"content": "Phase 5.3: Output - generate IMPL tasks with internal TDD phases (task-generate-tdd)", "status": "pending", "activeForm": "Generating TDD tasks"},
+  {"content": "Validate TDD structure", "status": "pending", "activeForm": "Validating TDD structure"}
+]})
+
+// 7. PHASE 5 TASKS COMPLETED:
+//    - COLLAPSE completed tasks into Phase 5 summary
+//    - Each generated IMPL task contains internal Red-Green-Refactor cycle
+TodoWrite({todos: [
+  {"content": "Execute session discovery", "status": "completed", "activeForm": "Executing session discovery"},
+  {"content": "Execute context gathering", "status": "completed", "activeForm": "Executing context gathering"},
+  {"content": "Execute test coverage analysis", "status": "completed", "activeForm": "Executing test coverage analysis"},
+  {"content": "Execute TDD task generation", "status": "completed", "activeForm": "Executing TDD task generation"},
+  {"content": "Validate TDD structure", "status": "in_progress", "activeForm": "Validating TDD structure"}
+]})
+
+// Benefits:
+// ✓ Real-time visibility into attached tasks during execution
+// ✓ Clean orchestrator-level summary after tasks complete
+// ✓ Clear mental model: SlashCommand = attach tasks, not delegate work
+// ✓ TDD-specific: Shows Red-Green-Refactor cycle generation in Phase 5
+// ✓ Dynamic attachment/collapse maintains clarity
+```
+
+## Execution Flow Diagram
+
+```
+TDD Workflow Orchestrator
+│
+├─ Phase 1: Session Discovery
+│  └─ /workflow:session:start --auto
+│     └─ Returns: sessionId
+│
+├─ Phase 2: Context Gathering
+│  └─ /workflow:tools:context-gather
+│     └─ Returns: context-package.json path
+│
+├─ Phase 3: Test Coverage Analysis                    ← ATTACHED (3 tasks)
+│  └─ /workflow:tools:test-context-gather
+│     ├─ Phase 3.1: Detect test framework
+│     ├─ Phase 3.2: Analyze existing test coverage
+│     └─ Phase 3.3: Identify coverage gaps
+│     └─ Returns: test-context-package.json           ← COLLAPSED
+│
+├─ Phase 4: Conflict Resolution (conditional)
+│  IF conflict_risk ≥ medium:
+│  └─ /workflow:tools:conflict-resolution             ← ATTACHED (3 tasks)
+│     ├─ Phase 4.1: Detect conflicts with CLI
+│     ├─ Phase 4.2: Present conflicts to user
+│     └─ Phase 4.3: Apply resolution strategies
+│     └─ Returns: CONFLICT_RESOLUTION.md              ← COLLAPSED
+│  ELSE:
+│  └─ Skip to Phase 5
+│
+├─ Phase 5: TDD Task Generation                       ← ATTACHED (3 tasks)
+│  └─ /workflow:tools:task-generate-tdd
+│     ├─ Phase 5.1: Discovery - analyze TDD requirements
+│     ├─ Phase 5.2: Planning - design Red-Green-Refactor cycles
+│     └─ Phase 5.3: Output - generate IMPL tasks with internal TDD phases
+│     └─ Returns: IMPL-*.json, IMPL_PLAN.md           ← COLLAPSED
+│        (Each IMPL task contains internal Red-Green-Refactor cycle)
+│
+└─ Phase 6: TDD Structure Validation
+   └─ Internal validation + summary returned
+   └─ Recommend: /workflow:action-plan-verify
+
+Key Points:
+• ← ATTACHED: SlashCommand attaches sub-tasks to orchestrator TodoWrite
+• ← COLLAPSED: Sub-tasks executed and collapsed to phase summary
+• TDD-specific: Each generated IMPL task contains complete Red-Green-Refactor cycle
 ```
 
 ## Input Processing
diff --git a/.claude/commands/workflow/test-fix-gen.md b/.claude/commands/workflow/test-fix-gen.md
index 9411b204..09adea9b 100644
--- a/.claude/commands/workflow/test-fix-gen.md
+++ b/.claude/commands/workflow/test-fix-gen.md
@@ -58,6 +58,19 @@ This command is a **pure planning coordinator**:
 - Creates independent test workflow session
 - **All execution delegated to `/workflow:test-cycle-execute`**
 
+**Task Attachment Model**:
+- SlashCommand invocation **expands workflow** by attaching sub-tasks to current TodoWrite
+- When a sub-command is invoked (e.g., `/workflow:tools:test-context-gather`), its internal tasks are attached to the orchestrator's TodoWrite
+- Orchestrator **executes these attached tasks** sequentially
+- After completion, attached tasks are **collapsed** back to high-level phase summary
+- This is **task expansion**, not external delegation
+
+**Auto-Continue Mechanism**:
+- TodoList tracks current phase status and dynamically manages task attachment/collapse
+- When each phase finishes executing, automatically execute next pending phase
+- All phases run autonomously without user interaction
+- **⚠️ CONTINUOUS EXECUTION** - Do not stop until all phases complete
+
 ---
 
 ## Usage
@@ -128,9 +141,11 @@ This command is a **pure planning coordinator**:
 3. **Parse Every Output**: Extract required data from each phase for next phase
 4. **Sequential Execution**: Each phase depends on previous phase's output
 5. **Complete All Phases**: Do not return until Phase 5 completes
-6. **Track Progress**: Update TodoWrite after every phase
+6. **Track Progress**: Update TodoWrite dynamically with task attachment/collapse pattern
 7. **Automatic Detection**: Mode auto-detected from input pattern
 8. **Parse Flags**: Extract `--use-codex` and `--cli-execute` flags for Phase 4
+9. **Task Attachment Model**: SlashCommand invocation **attaches** sub-tasks to current workflow. Orchestrator **executes** these attached tasks itself, then **collapses** them after completion
+10. **⚠️ CRITICAL: DO NOT STOP**: Continuous multi-phase workflow. After executing all attached tasks, immediately collapse them and execute next phase
 
 ### 5-Phase Execution
 
@@ -326,19 +341,98 @@ CRITICAL - Next Steps:
 
 ### TodoWrite Progress Tracking
 
-Track all 5 phases:
-
 ```javascript
+// ⚠️ CRITICAL: Dynamic TodoWrite task attachment strategy for test-fix-gen workflow:
+//
+// **Key Concept**: SlashCommand invocation ATTACHES tasks to current workflow.
+// Orchestrator EXECUTES these attached tasks itself, then COLLAPSES them.
+// **Dual-Mode Support**: Both Session Mode and Prompt Mode follow same attachment pattern.
+//
+// 1. INITIAL STATE: 5 orchestrator-level tasks
 TodoWrite({todos: [
-  {"content": "Create independent test session", "status": "in_progress|completed", "activeForm": "Creating test session"},
-  {"content": "Gather test coverage context", "status": "pending|in_progress|completed", "activeForm": "Gathering test coverage context"},
-  {"content": "Analyze test requirements with Gemini", "status": "pending|in_progress|completed", "activeForm": "Analyzing test requirements"},
-  {"content": "Generate test generation and execution tasks", "status": "pending|in_progress|completed", "activeForm": "Generating test tasks"},
-  {"content": "Return workflow summary", "status": "pending|in_progress|completed", "activeForm": "Returning workflow summary"}
+  {"content": "Create independent test session", "status": "in_progress", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "pending", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "pending", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
 ]})
-```
 
-Update status to `in_progress` when starting each phase, `completed` when done.
+// 2. PHASE 2 SlashCommand INVOCATION:
+//    - Session Mode: SlashCommand(/workflow:tools:test-context-gather) ATTACHES 3 tasks
+//    - Prompt Mode: SlashCommand(/workflow:tools:context-gather) ATTACHES 3 tasks
+//    - Orchestrator EXECUTES these 3 tasks sequentially
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Phase 2.1: Load context and analyze coverage (context-gather)", "status": "in_progress", "activeForm": "Loading context"},
+  {"content": "Phase 2.2: Detect test framework and conventions (context-gather)", "status": "pending", "activeForm": "Detecting test framework"},
+  {"content": "Phase 2.3: Generate context package (context-gather)", "status": "pending", "activeForm": "Generating context package"},
+  {"content": "Analyze test requirements with Gemini", "status": "pending", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 3. PHASE 2 TASKS COMPLETED:
+//    - COLLAPSE completed tasks into Phase 2 summary
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "pending", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 4. PHASE 3 SlashCommand INVOCATION (test-concept-enhanced):
+//    - SlashCommand(/workflow:tools:test-concept-enhanced) ATTACHES 3 tasks
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Phase 3.1: Analyze coverage gaps with Gemini (test-concept-enhanced)", "status": "in_progress", "activeForm": "Analyzing coverage gaps"},
+  {"content": "Phase 3.2: Study existing test patterns (test-concept-enhanced)", "status": "pending", "activeForm": "Studying test patterns"},
+  {"content": "Phase 3.3: Generate test generation strategy (test-concept-enhanced)", "status": "pending", "activeForm": "Generating test strategy"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 5. PHASE 3 TASKS COMPLETED:
+//    - COLLAPSE completed tasks into Phase 3 summary
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 6. PHASE 4 SlashCommand INVOCATION (test-task-generate):
+//    - SlashCommand(/workflow:tools:test-task-generate) ATTACHES 3 tasks
+//    - Generates IMPL-001.json, IMPL-002.json, and optionally IMPL-003.json
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Phase 4.1: Parse TEST_ANALYSIS_RESULTS.md (test-task-generate)", "status": "in_progress", "activeForm": "Parsing test analysis"},
+  {"content": "Phase 4.2: Generate task JSONs (IMPL-001, IMPL-002) (test-task-generate)", "status": "pending", "activeForm": "Generating task JSONs"},
+  {"content": "Phase 4.3: Generate IMPL_PLAN.md and TODO_LIST.md (test-task-generate)", "status": "pending", "activeForm": "Generating plan documents"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 7. PHASE 4 TASKS COMPLETED:
+//    - COLLAPSE completed tasks into Phase 4 summary
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "completed", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "in_progress", "activeForm": "Returning workflow summary"}
+]})
+
+// Benefits:
+// ✓ Real-time visibility into attached tasks during execution
+// ✓ Clean orchestrator-level summary after tasks complete
+// ✓ Clear mental model: SlashCommand = attach tasks, not delegate work
+// ✓ Dual-mode support: Both Session Mode and Prompt Mode use same attachment pattern
+// ✓ Dynamic attachment/collapse maintains clarity
+```
 
 ---
 
@@ -498,18 +592,62 @@ WFS-test-[session]/
 - `workflow_type: "test_session"`
 - No `source_session_id` field
 
-### Complete Data Flow
+### Execution Flow Diagram
 
-**Example Command**: `/workflow:test-fix-gen WFS-user-auth`
+```
+Test-Fix-Gen Workflow Orchestrator (Dual-Mode Support)
+│
+├─ Phase 1: Create Test Session
+│  ├─ Session Mode: /workflow:session:start --new (with source_session_id)
+│  └─ Prompt Mode: /workflow:session:start --new (without source_session_id)
+│     └─ Returns: testSessionId (WFS-test-[slug])
+│
+├─ Phase 2: Gather Context                                   ← ATTACHED (3 tasks)
+│  ├─ Session Mode: /workflow:tools:test-context-gather
+│  │  └─ Load source session summaries + analyze coverage
+│  └─ Prompt Mode: /workflow:tools:context-gather
+│     └─ Analyze codebase from description
+│     ├─ Phase 2.1: Load context and analyze coverage
+│     ├─ Phase 2.2: Detect test framework and conventions
+│     └─ Phase 2.3: Generate context package
+│     └─ Returns: [test-]context-package.json                ← COLLAPSED
+│
+├─ Phase 3: Test Generation Analysis                         ← ATTACHED (3 tasks)
+│  └─ /workflow:tools:test-concept-enhanced
+│     ├─ Phase 3.1: Analyze coverage gaps with Gemini
+│     ├─ Phase 3.2: Study existing test patterns
+│     └─ Phase 3.3: Generate test generation strategy
+│     └─ Returns: TEST_ANALYSIS_RESULTS.md                   ← COLLAPSED
+│
+├─ Phase 4: Generate Test Tasks                              ← ATTACHED (3 tasks)
+│  └─ /workflow:tools:test-task-generate
+│     ├─ Phase 4.1: Parse TEST_ANALYSIS_RESULTS.md
+│     ├─ Phase 4.2: Generate task JSONs (IMPL-001, IMPL-002)
+│     └─ Phase 4.3: Generate IMPL_PLAN.md and TODO_LIST.md
+│     └─ Returns: Task JSONs and plans                       ← COLLAPSED
+│
+└─ Phase 5: Return Summary
+   └─ Command ends, control returns to user
 
-**Phase Execution Chain**:
-1. Phase 1: `session-start` → `WFS-test-user-auth`
-2. Phase 2: `test-context-gather` → `test-context-package.json`
-3. Phase 3: `test-concept-enhanced` → `TEST_ANALYSIS_RESULTS.md`
-4. Phase 4: `test-task-generate` → `IMPL-001.json` + `IMPL-002.json` (+ additional if needed)
-5. Phase 5: Return summary
+Artifacts Created:
+├── .workflow/WFS-test-[session]/
+│   ├── workflow-session.json
+│   ├── IMPL_PLAN.md
+│   ├── TODO_LIST.md
+│   ├── .task/
+│   │   ├── IMPL-001.json (test understanding & generation)
+│   │   ├── IMPL-002.json (test execution & fix cycle)
+│   │   └── IMPL-003.json (optional: test review & certification)
+│   └── .process/
+│       ├── [test-]context-package.json
+│       └── TEST_ANALYSIS_RESULTS.md
 
-**Command completes after Phase 5**
+Key Points:
+• ← ATTACHED: SlashCommand attaches sub-tasks to orchestrator TodoWrite
+• ← COLLAPSED: Sub-tasks executed and collapsed to phase summary
+• Dual-Mode: Session Mode and Prompt Mode share same attachment pattern
+• Command Boundary: Execution delegated to /workflow:test-cycle-execute
+```
 
 ---
 
diff --git a/.claude/commands/workflow/test-gen.md b/.claude/commands/workflow/test-gen.md
index 09807fc3..c080e39d 100644
--- a/.claude/commands/workflow/test-gen.md
+++ b/.claude/commands/workflow/test-gen.md
@@ -18,6 +18,19 @@ allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(*)
 - **Parameter Simplification**: Tools auto-detect test session type via metadata, no manual cross-session parameters needed
 - **Manual First**: Default to manual fixes, use `--use-codex` flag for automated Codex fix application
 
+**Task Attachment Model**:
+- SlashCommand invocation **expands workflow** by attaching sub-tasks to current TodoWrite
+- When a sub-command is invoked (e.g., `/workflow:tools:test-context-gather`), its internal tasks are attached to the orchestrator's TodoWrite
+- Orchestrator **executes these attached tasks** sequentially
+- After completion, attached tasks are **collapsed** back to high-level phase summary
+- This is **task expansion**, not external delegation
+
+**Auto-Continue Mechanism**:
+- TodoList tracks current phase status and dynamically manages task attachment/collapse
+- When each phase finishes executing, automatically execute next pending phase
+- All phases run autonomously without user interaction
+- **⚠️ CONTINUOUS EXECUTION** - Do not stop until all phases complete
+
 **Execution Flow**:
 1. Initialize TodoWrite → Create test session → Parse session ID
 2. Gather cross-session context (automatic) → Parse context path
@@ -33,10 +46,12 @@ allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(*)
 3. **Parse Every Output**: Extract required data from each phase for next phase
 4. **Sequential Execution**: Each phase depends on previous phase's output
 5. **Complete All Phases**: Do not return to user until Phase 5 completes (summary returned)
-6. **Track Progress**: Update TodoWrite when each phase finishes executing
+6. **Track Progress**: Update TodoWrite dynamically with task attachment/collapse pattern
 7. **Automatic Detection**: context-gather auto-detects test session and gathers source session context
 8. **Parse --use-codex Flag**: Extract flag from arguments and pass to Phase 4 (test-task-generate)
 9. **Command Boundary**: This command ends at Phase 5 summary. Test execution is NOT part of this command.
+10. **Task Attachment Model**: SlashCommand invocation **attaches** sub-tasks to current workflow. Orchestrator **executes** these attached tasks itself, then **collapses** them after completion
+11. **⚠️ CRITICAL: DO NOT STOP**: Continuous multi-phase workflow. After executing all attached tasks, immediately collapse them and execute next phase
 
 ## 5-Phase Execution
 
@@ -89,7 +104,39 @@ allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(*)
 - Test framework detected
 - Test conventions documented
 
-**TodoWrite**: Mark phase 2 completed, phase 3 in_progress
+<!-- TodoWrite: When test-context-gather invoked, INSERT 3 test-context-gather tasks -->
+
+**TodoWrite Update (Phase 2 SlashCommand invoked - tasks attached)**:
+```json
+[
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Phase 2.1: Load source session summaries (test-context-gather)", "status": "in_progress", "activeForm": "Loading source session summaries"},
+  {"content": "Phase 2.2: Analyze test coverage with MCP tools (test-context-gather)", "status": "pending", "activeForm": "Analyzing test coverage"},
+  {"content": "Phase 2.3: Identify coverage gaps and framework (test-context-gather)", "status": "pending", "activeForm": "Identifying coverage gaps"},
+  {"content": "Analyze test requirements with Gemini", "status": "pending", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]
+```
+
+**Note**: SlashCommand invocation **attaches** test-context-gather's 3 tasks. Orchestrator **executes** these tasks.
+
+**Next Action**: Tasks attached → **Execute Phase 2.1-2.3** sequentially
+
+<!-- TodoWrite: After Phase 2 tasks complete, REMOVE Phase 2.1-2.3, restore to orchestrator view -->
+
+**TodoWrite Update (Phase 2 completed - tasks collapsed)**:
+```json
+[
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "pending", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]
+```
+
+**Note**: Phase 2 tasks completed and collapsed to summary.
 
 ---
 
@@ -121,7 +168,39 @@ allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(*)
   - Implementation Targets (test files to create)
   - Success Criteria
 
-**TodoWrite**: Mark phase 3 completed, phase 4 in_progress
+<!-- TodoWrite: When test-concept-enhanced invoked, INSERT 3 concept-enhanced tasks -->
+
+**TodoWrite Update (Phase 3 SlashCommand invoked - tasks attached)**:
+```json
+[
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Phase 3.1: Analyze coverage gaps with Gemini (test-concept-enhanced)", "status": "in_progress", "activeForm": "Analyzing coverage gaps"},
+  {"content": "Phase 3.2: Study existing test patterns (test-concept-enhanced)", "status": "pending", "activeForm": "Studying test patterns"},
+  {"content": "Phase 3.3: Generate test generation strategy (test-concept-enhanced)", "status": "pending", "activeForm": "Generating test strategy"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]
+```
+
+**Note**: SlashCommand invocation **attaches** test-concept-enhanced's 3 tasks. Orchestrator **executes** these tasks.
+
+**Next Action**: Tasks attached → **Execute Phase 3.1-3.3** sequentially
+
+<!-- TodoWrite: After Phase 3 tasks complete, REMOVE Phase 3.1-3.3, restore to orchestrator view -->
+
+**TodoWrite Update (Phase 3 completed - tasks collapsed)**:
+```json
+[
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]
+```
+
+**Note**: Phase 3 tasks completed and collapsed to summary.
 
 ---
 
@@ -173,7 +252,39 @@ allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(*)
   - Phase 2: Iterative Gemini diagnosis + manual/Codex fixes (based on flag)
   - Phase 3: Final validation and certification
 
-**TodoWrite**: Mark phase 4 completed, phase 5 in_progress
+<!-- TodoWrite: When test-task-generate invoked, INSERT 3 test-task-generate tasks -->
+
+**TodoWrite Update (Phase 4 SlashCommand invoked - tasks attached)**:
+```json
+[
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Phase 4.1: Parse TEST_ANALYSIS_RESULTS.md (test-task-generate)", "status": "in_progress", "activeForm": "Parsing test analysis"},
+  {"content": "Phase 4.2: Generate IMPL-001.json and IMPL-002.json (test-task-generate)", "status": "pending", "activeForm": "Generating task JSONs"},
+  {"content": "Phase 4.3: Generate IMPL_PLAN.md and TODO_LIST.md (test-task-generate)", "status": "pending", "activeForm": "Generating plan documents"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]
+```
+
+**Note**: SlashCommand invocation **attaches** test-task-generate's 3 tasks. Orchestrator **executes** these tasks.
+
+**Next Action**: Tasks attached → **Execute Phase 4.1-4.3** sequentially
+
+<!-- TodoWrite: After Phase 4 tasks complete, REMOVE Phase 4.1-4.3, restore to orchestrator view -->
+
+**TodoWrite Update (Phase 4 completed - tasks collapsed)**:
+```json
+[
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "completed", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "in_progress", "activeForm": "Returning workflow summary"}
+]
+```
+
+**Note**: Phase 4 tasks completed and collapsed to summary.
 
 ---
 
@@ -214,37 +325,128 @@ Ready for execution. Use appropriate workflow commands to proceed.
 
 ## TodoWrite Pattern
 
-Track progress through 5 phases:
-
 ```javascript
+// ⚠️ CRITICAL: Dynamic TodoWrite task attachment strategy for test-gen workflow:
+//
+// **Key Concept**: SlashCommand invocation ATTACHES tasks to current workflow.
+// Orchestrator EXECUTES these attached tasks itself, then COLLAPSES them.
+//
+// 1. INITIAL STATE: 5 orchestrator-level tasks
 TodoWrite({todos: [
-  {"content": "Create independent test session", "status": "in_progress|completed", "activeForm": "Creating test session"},
-  {"content": "Gather test coverage context", "status": "pending|in_progress|completed", "activeForm": "Gathering test coverage context"},
-  {"content": "Analyze test requirements with Gemini", "status": "pending|in_progress|completed", "activeForm": "Analyzing test requirements"},
-  {"content": "Generate test generation and execution tasks", "status": "pending|in_progress|completed", "activeForm": "Generating test tasks"},
-  {"content": "Return workflow summary", "status": "pending|in_progress|completed", "activeForm": "Returning workflow summary"}
+  {"content": "Create independent test session", "status": "in_progress", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "pending", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "pending", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
 ]})
+
+// 2. PHASE 2 SlashCommand INVOCATION (test-context-gather):
+//    - SlashCommand(/workflow:tools:test-context-gather) ATTACHES 3 tasks
+//    - Orchestrator EXECUTES these 3 tasks sequentially
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Phase 2.1: Load source session summaries (test-context-gather)", "status": "in_progress", "activeForm": "Loading source session summaries"},
+  {"content": "Phase 2.2: Analyze test coverage with MCP tools (test-context-gather)", "status": "pending", "activeForm": "Analyzing test coverage"},
+  {"content": "Phase 2.3: Identify coverage gaps and framework (test-context-gather)", "status": "pending", "activeForm": "Identifying coverage gaps"},
+  {"content": "Analyze test requirements with Gemini", "status": "pending", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 3. PHASE 2 TASKS COMPLETED:
+//    - COLLAPSE completed tasks into Phase 2 summary
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "pending", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 4. PHASE 3 SlashCommand INVOCATION (test-concept-enhanced):
+//    - SlashCommand(/workflow:tools:test-concept-enhanced) ATTACHES 3 tasks
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Phase 3.1: Analyze coverage gaps with Gemini (test-concept-enhanced)", "status": "in_progress", "activeForm": "Analyzing coverage gaps"},
+  {"content": "Phase 3.2: Study existing test patterns (test-concept-enhanced)", "status": "pending", "activeForm": "Studying test patterns"},
+  {"content": "Phase 3.3: Generate test generation strategy (test-concept-enhanced)", "status": "pending", "activeForm": "Generating test strategy"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 5. PHASE 3 TASKS COMPLETED:
+//    - COLLAPSE completed tasks into Phase 3 summary
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "pending", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 6. PHASE 4 SlashCommand INVOCATION (test-task-generate):
+//    - SlashCommand(/workflow:tools:test-task-generate) ATTACHES 3 tasks
+//    - Generates IMPL-001.json and IMPL-002.json
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Phase 4.1: Parse TEST_ANALYSIS_RESULTS.md (test-task-generate)", "status": "in_progress", "activeForm": "Parsing test analysis"},
+  {"content": "Phase 4.2: Generate IMPL-001.json and IMPL-002.json (test-task-generate)", "status": "pending", "activeForm": "Generating task JSONs"},
+  {"content": "Phase 4.3: Generate IMPL_PLAN.md and TODO_LIST.md (test-task-generate)", "status": "pending", "activeForm": "Generating plan documents"},
+  {"content": "Return workflow summary", "status": "pending", "activeForm": "Returning workflow summary"}
+]})
+
+// 7. PHASE 4 TASKS COMPLETED:
+//    - COLLAPSE completed tasks into Phase 4 summary
+TodoWrite({todos: [
+  {"content": "Create independent test session", "status": "completed", "activeForm": "Creating test session"},
+  {"content": "Gather test coverage context", "status": "completed", "activeForm": "Gathering test coverage context"},
+  {"content": "Analyze test requirements with Gemini", "status": "completed", "activeForm": "Analyzing test requirements"},
+  {"content": "Generate test generation and execution tasks", "status": "completed", "activeForm": "Generating test tasks"},
+  {"content": "Return workflow summary", "status": "in_progress", "activeForm": "Returning workflow summary"}
+]})
+
+// Benefits:
+// ✓ Real-time visibility into attached tasks during execution
+// ✓ Clean orchestrator-level summary after tasks complete
+// ✓ Clear mental model: SlashCommand = attach tasks, not delegate work
+// ✓ Dynamic attachment/collapse maintains clarity
 ```
 
-Update status to `in_progress` when starting each phase, mark `completed` when done.
-
-## Data Flow
+## Execution Flow Diagram
 
 ```
-┌─────────────────────────────────────────────────────────┐
-│ /workflow:test-gen WFS-user-auth                        │
-├─────────────────────────────────────────────────────────┤
-│ Phase 1: session-start → WFS-test-user-auth            │
-│   ↓                                                     │
-│ Phase 2: test-context-gather → test-context-package.json│
-│   ↓                                                     │
-│ Phase 3: test-concept-enhanced → TEST_ANALYSIS_RESULTS.md│
-│   ↓                                                     │
-│ Phase 4: test-task-generate → IMPL-001.json + IMPL-002.json│
-│   ↓                                                     │
-│ Phase 5: Return summary                                │
-└─────────────────────────────────────────────────────────┘
-         COMMAND ENDS - Control returns to user
+Test-Gen Workflow Orchestrator
+│
+├─ Phase 1: Create Test Session
+│  └─ /workflow:session:start --new
+│     └─ Returns: testSessionId (WFS-test-[source])
+│
+├─ Phase 2: Gather Test Context                           ← ATTACHED (3 tasks)
+│  └─ /workflow:tools:test-context-gather
+│     ├─ Phase 2.1: Load source session summaries
+│     ├─ Phase 2.2: Analyze test coverage with MCP tools
+│     └─ Phase 2.3: Identify coverage gaps and framework
+│     └─ Returns: test-context-package.json               ← COLLAPSED
+│
+├─ Phase 3: Test Generation Analysis                      ← ATTACHED (3 tasks)
+│  └─ /workflow:tools:test-concept-enhanced
+│     ├─ Phase 3.1: Analyze coverage gaps with Gemini
+│     ├─ Phase 3.2: Study existing test patterns
+│     └─ Phase 3.3: Generate test generation strategy
+│     └─ Returns: TEST_ANALYSIS_RESULTS.md                ← COLLAPSED
+│
+├─ Phase 4: Generate Test Tasks                           ← ATTACHED (3 tasks)
+│  └─ /workflow:tools:test-task-generate
+│     ├─ Phase 4.1: Parse TEST_ANALYSIS_RESULTS.md
+│     ├─ Phase 4.2: Generate IMPL-001.json and IMPL-002.json
+│     └─ Phase 4.3: Generate IMPL_PLAN.md and TODO_LIST.md
+│     └─ Returns: Task JSONs and plans                    ← COLLAPSED
+│
+└─ Phase 5: Return Summary
+   └─ Command ends, control returns to user
 
 Artifacts Created:
 ├── .workflow/WFS-test-[session]/
@@ -257,6 +459,10 @@ Artifacts Created:
 │   └── .process/
 │       ├── test-context-package.json
 │       └── TEST_ANALYSIS_RESULTS.md
+
+Key Points:
+• ← ATTACHED: SlashCommand attaches sub-tasks to orchestrator TodoWrite
+• ← COLLAPSED: Sub-tasks executed and collapsed to phase summary
 ```
 
 ## Session Metadata