refactor(commands): replace bash/jq operations with ccw session commands

- session/start.md: Replace find/mkdir/echo with ccw session list/init
- session/list.md: Replace find/jq with ccw session list/stats/read
- session/resume.md: Replace jq status updates with ccw session status
- session/complete.md: Replace jq/mv with ccw session archive
- execute.md: Replace session discovery with ccw session list/status
- code-developer.md: Replace jq context-package read with ccw session read

Benefits:
- Atomic operations (no temp files)
- Auto workspace detection (works from subdirectories)
- Auto session location detection (active/archived/lite)
- Status history auto-tracking for tasks
- Consistent error handling

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/commands/workflow/execute.md

@@ -68,8 +68,8 @@ Phase 4: Execution Strategy & Task Execution
          ├─ Lazy load task JSON
          ├─ Launch agent with task context
          ├─ Mark task completed (update IMPL-*.json status)
-         │  # Quick fix: Update task status for ccw dashboard
-         │  # TS=$(date -Iseconds) && jq --arg ts "$TS" '.status="completed" | .status_history=(.status_history // [])+[{"from":"in_progress","to":"completed","changed_at":$ts}]' IMPL-X.json > tmp.json && mv tmp.json IMPL-X.json
+         │  # Update task status with ccw session (auto-tracks status_history):
+         │  # ccw session task ${sessionId} IMPL-X completed
          └─ Advance to next task
 
 Phase 5: Completion
@@ -92,37 +92,32 @@ Resume Mode (--resume-session):
 
 **Process**:
 
-#### Step 1.1: Count Active Sessions
+#### Step 1.1: List Active Sessions
 ```bash
-bash(find .workflow/active/ -name "WFS-*" -type d 2>/dev/null | wc -l)
+ccw session list --location active
+# Returns: {"success":true,"result":{"active":[...],"total":N}}
 ```
 
 #### Step 1.2: Handle Session Selection
 
-**Case A: No Sessions** (count = 0)
+**Case A: No Sessions** (total = 0)
 ```
 ERROR: No active workflow sessions found
 Run /workflow:plan "task description" to create a session
 ```
 
-**Case B: Single Session** (count = 1)
-```bash
-bash(find .workflow/active/ -name "WFS-*" -type d 2>/dev/null | head -1 | xargs basename)
-```
-Auto-select and continue to Phase 2.
+**Case B: Single Session** (total = 1)
+Auto-select the single session from result.active[0].session_id and continue to Phase 2.
 
-**Case C: Multiple Sessions** (count > 1)
+**Case C: Multiple Sessions** (total > 1)
 
-List sessions with metadata and prompt user selection:
+List sessions with metadata using ccw session:
 ```bash
-bash(for dir in .workflow/active/WFS-*/; do
-  session=$(basename "$dir")
-  project=$(jq -r '.project // "Unknown"' "$dir/workflow-session.json" 2>/dev/null)
-  total=$(grep -c "^- \[" "$dir/TODO_LIST.md" 2>/dev/null || echo "0")
-  completed=$(grep -c "^- \[x\]" "$dir/TODO_LIST.md" 2>/dev/null || echo "0")
-  [ "$total" -gt 0 ] && progress=$((completed * 100 / total)) || progress=0
-  echo "${session} | ${project} | ${completed}/${total} tasks (${progress}%)"
-done)
+# Get session list with metadata
+ccw session list --location active
+
+# For each session, get stats
+ccw session stats WFS-session-name
 ```
 
 Use AskUserQuestion to present formatted options (max 4 options shown):
@@ -154,7 +149,7 @@ Parse user input (supports: number "1", full ID "WFS-auth-system", or partial "a
 
 #### Step 1.3: Load Session Metadata
 ```bash
-bash(cat .workflow/active/${sessionId}/workflow-session.json)
+ccw session read ${sessionId} --type session
 ```
 
 **Output**: Store session metadata in memory
@@ -164,8 +159,8 @@ bash(cat .workflow/active/${sessionId}/workflow-session.json)
 **Purpose**: Update workflow-session.json status from "planning" to "active" for dashboard monitoring.
 
 ```bash
-# Update status atomically using jq
-bash(jq '.status = "active"' .workflow/active/${sessionId}/workflow-session.json > /tmp/ws.json && mv /tmp/ws.json .workflow/active/${sessionId}/workflow-session.json)
+# Update status atomically using ccw session
+ccw session status ${sessionId} active
 ```
 
 **Resume Mode**: This entire phase is skipped when `--resume-session="session-id"` flag is provided.