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/ui-design/design-sync.md

@@ -25,10 +25,10 @@ Synchronize finalized design system references to brainstorming artifacts, prepa
 
 ```bash
 # Validate session
-CHECK: .workflow/.active-* marker files; VALIDATE: session_id matches active session
+CHECK: find .workflow/sessions/ -name "WFS-*" -type d; VALIDATE: session_id matches active session
 
 # Verify design artifacts in latest design run
-latest_design = find_latest_path_matching(".workflow/WFS-{session}/design-run-*")
+latest_design = find_latest_path_matching(".workflow/sessions/WFS-{session}/design-run-*")
 
 # Detect design system structure
 IF exists({latest_design}/style-extraction/style-1/design-tokens.json):
@@ -51,7 +51,7 @@ REPORT: "Found {count} design artifacts, {prototype_count} prototypes"
 
 ```bash
 # Check if role analysis documents contains current design run reference
-synthesis_spec_path = ".workflow/WFS-{session}/.brainstorming/role analysis documents"
+synthesis_spec_path = ".workflow/sessions/WFS-{session}/.brainstorming/role analysis documents"
 current_design_run = basename(latest_design)  # e.g., "design-run-20250109-143022"
 
 IF exists(synthesis_spec_path):
@@ -68,8 +68,8 @@ IF exists(synthesis_spec_path):
 
 ```bash
 # Load target brainstorming artifacts (files to be updated)
-Read(.workflow/WFS-{session}/.brainstorming/role analysis documents)
-IF exists(.workflow/WFS-{session}/.brainstorming/ui-designer/analysis.md): Read(analysis.md)
+Read(.workflow/sessions/WFS-{session}/.brainstorming/role analysis documents)
+IF exists(.workflow/sessions/WFS-{session}/.brainstorming/ui-designer/analysis.md): Read(analysis.md)
 
 # Optional: Read prototype notes for descriptions (minimal context)
 FOR each selected_prototype IN selected_list:
@@ -113,7 +113,7 @@ Update `.brainstorming/role analysis documents` with design system references.
 **Implementation**:
 ```bash
 # Option 1: Edit existing section
-Edit(file_path=".workflow/WFS-{session}/.brainstorming/role analysis documents",
+Edit(file_path=".workflow/sessions/WFS-{session}/.brainstorming/role analysis documents",
      old_string="## UI/UX Guidelines\n[existing content]",
      new_string="## UI/UX Guidelines\n\n[new design reference content]")
 
@@ -128,15 +128,15 @@ IF section not found:
 
 ```bash
 # Always update ui-designer
-ui_designer_files = Glob(".workflow/WFS-{session}/.brainstorming/ui-designer/analysis*.md")
+ui_designer_files = Glob(".workflow/sessions/WFS-{session}/.brainstorming/ui-designer/analysis*.md")
 
 # Conditionally update other roles
 has_animations = exists({latest_design}/animation-extraction/animation-tokens.json)
 has_layouts = exists({latest_design}/layout-extraction/layout-templates.json)
 
-IF has_animations: ux_expert_files = Glob(".workflow/WFS-{session}/.brainstorming/ux-expert/analysis*.md")
-IF has_layouts: architect_files = Glob(".workflow/WFS-{session}/.brainstorming/system-architect/analysis*.md")
-IF selected_list: pm_files = Glob(".workflow/WFS-{session}/.brainstorming/product-manager/analysis*.md")
+IF has_animations: ux_expert_files = Glob(".workflow/sessions/WFS-{session}/.brainstorming/ux-expert/analysis*.md")
+IF has_layouts: architect_files = Glob(".workflow/sessions/WFS-{session}/.brainstorming/system-architect/analysis*.md")
+IF selected_list: pm_files = Glob(".workflow/sessions/WFS-{session}/.brainstorming/product-manager/analysis*.md")
 ```
 
 **Content Templates**:
@@ -223,7 +223,7 @@ For complete token definitions and usage examples, see:
 
 **Implementation**:
 ```bash
-Write(file_path=".workflow/WFS-{session}/.brainstorming/ui-designer/design-system-reference.md",
+Write(file_path=".workflow/sessions/WFS-{session}/.brainstorming/ui-designer/design-system-reference.md",
       content="[generated content with @ references]")
 ```
 
@@ -259,7 +259,7 @@ Next: /workflow:plan [--agent] "<task description>"
 
 **Updated Files**:
 ```
-.workflow/WFS-{session}/.brainstorming/
+.workflow/sessions/WFS-{session}/.brainstorming/
 ├── role analysis documents              # Updated with UI/UX Guidelines section
 ├── ui-designer/
 │   ├── analysis*.md                     # Updated with design system references