fix(workflow): complete path migration and enhance session:complete

Comprehensive update to eliminate all old path references and implement transactional archival in session:complete.

## Part 1: Complete Path Migration (43 files)

### Files Updated
- action-plan-verify.md
- session/list.md, session/resume.md
- tdd-verify.md, tdd-plan.md, test-*.md
- All brainstorm/*.md files (13 files)
- All tools/*.md files (10 files)
- All ui-design/*.md files (10 files)
- lite-plan.md, lite-execute.md, plan.md

### Path Changes
- `.workflow/.active-*` → `find .workflow/sessions/ -name "WFS-*" -type d`
- `.workflow/WFS-{session}` → `.workflow/sessions/WFS-{session}`
- `.workflow/.archives/` → `.workflow/archives/`
- Removed all marker file operations (touch/rm .active-*)

### Verification
- ✅ 0 references to .active-* markers remain
- ✅ 0 references to direct .workflow/WFS-* paths
- ✅ 0 references to .workflow/.archives/ (dot prefix)

## Part 2: Transactional Archival Enhancement

### session/complete.md - Complete Rewrite

**New Four-Phase Architecture**:

1. **Phase 1: Pre-Archival Preparation**
   - Find active session in .workflow/sessions/
   - Check for existing .archiving marker (resume detection)
   - Create .archiving marker to prevent concurrent operations

2. **Phase 2: Agent Analysis (In-Place)**
   - Agent processes session WHILE STILL in sessions/ directory
   - Pure analysis - no file moves or manifest updates
   - Returns complete metadata package for atomic commit
   - Failure here → session remains active, safe to retry

3. **Phase 3: Atomic Commit**
   - Only executes if Phase 2 succeeds
   - Move session to archives/
   - Update manifest.json
   - Remove .archiving marker
   - All-or-nothing guarantee

4. **Phase 4: Project Registry Update**
   - Extract feature metadata and update project.json

**Key Improvements**:
- **Agent-first, move-second**: Prevents inconsistent states
- **Transactional guarantees**: All-or-nothing file operations
- **Resume capability**: .archiving marker enables safe retry
- **Error recovery**: Comprehensive failure handling documented

**Old Design Flaw (Fixed)**:
- Old: Move first → Agent processes → If agent fails, session moved but metadata incomplete
- New: Agent processes → If success, atomic commit → Guaranteed consistency

## Benefits

1. **Consistency**: All commands use identical path patterns
2. **Robustness**: Transactional archival prevents data loss
3. **Maintainability**: Single source of truth for directory structure
4. **Recoverability**: Failed operations can be safely retried
5. **Alignment**: Closer to OpenSpec's clean three-layer model

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/commands/workflow/tdd-verify.md

@@ -28,7 +28,7 @@ allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(gemini:*)
 sessionId = argument
 
 # Else auto-detect active session
-find .workflow/ -name '.active-*' | head -1 | sed 's/.*active-//'
+find .workflow/sessions/ -name "WFS-*" -type d | head -1 | sed 's/.*\///'
 ```
 
 **Extract**: sessionId
@@ -44,18 +44,18 @@ find .workflow/ -name '.active-*' | head -1 | sed 's/.*active-//'
 
 ```bash
 # Load all task JSONs
-find .workflow/{sessionId}/.task/ -name '*.json'
+find .workflow/sessions/{sessionId}/.task/ -name '*.json'
 
 # Extract task IDs
-find .workflow/{sessionId}/.task/ -name '*.json' -exec jq -r '.id' {} \;
+find .workflow/sessions/{sessionId}/.task/ -name '*.json' -exec jq -r '.id' {} \;
 
 # Check dependencies
-find .workflow/{sessionId}/.task/ -name 'IMPL-*.json' -exec jq -r '.context.depends_on[]?' {} \;
-find .workflow/{sessionId}/.task/ -name 'REFACTOR-*.json' -exec jq -r '.context.depends_on[]?' {} \;
+find .workflow/sessions/{sessionId}/.task/ -name 'IMPL-*.json' -exec jq -r '.context.depends_on[]?' {} \;
+find .workflow/sessions/{sessionId}/.task/ -name 'REFACTOR-*.json' -exec jq -r '.context.depends_on[]?' {} \;
 
 # Check meta fields
-find .workflow/{sessionId}/.task/ -name '*.json' -exec jq -r '.meta.tdd_phase' {} \;
-find .workflow/{sessionId}/.task/ -name '*.json' -exec jq -r '.meta.agent' {} \;
+find .workflow/sessions/{sessionId}/.task/ -name '*.json' -exec jq -r '.meta.tdd_phase' {} \;
+find .workflow/sessions/{sessionId}/.task/ -name '*.json' -exec jq -r '.meta.agent' {} \;
 ```
 
 **Validation**:
@@ -82,9 +82,9 @@ find .workflow/{sessionId}/.task/ -name '*.json' -exec jq -r '.meta.agent' {} \;
 - Compliance score
 
 **Validation**:
-- `.workflow/{sessionId}/.process/test-results.json` exists
-- `.workflow/{sessionId}/.process/coverage-report.json` exists
-- `.workflow/{sessionId}/.process/tdd-cycle-report.md` exists
+- `.workflow/sessions/{sessionId}/.process/test-results.json` exists
+- `.workflow/sessions/{sessionId}/.process/coverage-report.json` exists
+- `.workflow/sessions/{sessionId}/.process/tdd-cycle-report.md` exists
 
 **TodoWrite**: Mark phase 3 completed, phase 4 in_progress
 
@@ -97,7 +97,7 @@ find .workflow/{sessionId}/.task/ -name '*.json' -exec jq -r '.meta.agent' {} \;
 cd project-root && gemini -p "
 PURPOSE: Generate TDD compliance report
 TASK: Analyze TDD workflow execution and generate quality report
-CONTEXT: @{.workflow/{sessionId}/.task/*.json,.workflow/{sessionId}/.summaries/*,.workflow/{sessionId}/.process/tdd-cycle-report.md}
+CONTEXT: @{.workflow/sessions/{sessionId}/.task/*.json,.workflow/sessions/{sessionId}/.summaries/*,.workflow/sessions/{sessionId}/.process/tdd-cycle-report.md}
 EXPECTED:
 - TDD compliance score (0-100)
 - Chain completeness verification
@@ -106,7 +106,7 @@ EXPECTED:
 - Red-Green-Refactor cycle validation
 - Best practices adherence assessment
 RULES: Focus on TDD best practices and workflow adherence. Be specific about violations and improvements.
-" > .workflow/{sessionId}/TDD_COMPLIANCE_REPORT.md
+" > .workflow/sessions/{sessionId}/TDD_COMPLIANCE_REPORT.md
 ```
 
 **Output**: TDD_COMPLIANCE_REPORT.md
@@ -134,7 +134,7 @@ Function Coverage: {percentage}%
 
 ## Compliance Score: {score}/100
 
-Detailed report: .workflow/{sessionId}/TDD_COMPLIANCE_REPORT.md
+Detailed report: .workflow/sessions/{sessionId}/TDD_COMPLIANCE_REPORT.md
 
 Recommendations:
 - Complete missing REFACTOR-3.1 task
@@ -168,7 +168,7 @@ TodoWrite({todos: [
 
 ### Chain Validation Algorithm
 ```
-1. Load all task JSONs from .workflow/{sessionId}/.task/
+1. Load all task JSONs from .workflow/sessions/{sessionId}/.task/
 2. Extract task IDs and group by feature number
 3. For each feature:
    - Check TEST-N.M exists
@@ -202,7 +202,7 @@ Final Score: Max(0, Base Score - Deductions)
 
 ## Output Files
 ```
-.workflow/{session-id}/
+.workflow/sessions/{session-id}/
 ├── TDD_COMPLIANCE_REPORT.md     # Comprehensive compliance report ⭐
 └── .process/
     ├── test-results.json         # From tdd-coverage-analysis
@@ -215,8 +215,8 @@ Final Score: Max(0, Base Score - Deductions)
 ### Session Discovery Errors
 | Error | Cause | Resolution |
 |-------|-------|------------|
-| No active session | No .active-* file | Provide session-id explicitly |
-| Multiple active sessions | Multiple .active-* files | Provide session-id explicitly |
+| No active session | No WFS-* directories | Provide session-id explicitly |
+| Multiple active sessions | Multiple WFS-* directories | Provide session-id explicitly |
 | Session not found | Invalid session-id | Check available sessions |
 
 ### Validation Errors