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/session/resume.md

@@ -17,39 +17,35 @@ Resume the most recently paused workflow session, restoring all context and stat
 
 ### Step 1: Find Paused Sessions
 ```bash
-ls .workflow/active/WFS-* 2>/dev/null
+ccw session list --location active
+# Filter for sessions with status="paused"
 ```
 
 ### Step 2: Check Session Status
 ```bash
-jq -r '.status' .workflow/active/WFS-session/workflow-session.json
+ccw session read WFS-session --type session
+# Check .status field in response
 ```
 
 ### Step 3: Find Most Recent Paused
 ```bash
-ls -t .workflow/active/WFS-*/workflow-session.json | head -1
+ccw session list --location active
+# Sort by created_at, filter for paused status
 ```
 
-### Step 4: Update Session Status
+### Step 4: Update Session Status to Active
 ```bash
-jq '.status = "active"' .workflow/active/WFS-session/workflow-session.json > temp.json
-mv temp.json .workflow/active/WFS-session/workflow-session.json
+ccw session status WFS-session active
+# Or with full update:
+ccw session update WFS-session --type session --content '{"status":"active","resumed_at":"2025-12-10T08:00:00Z"}'
 ```
 
-### Step 5: Add Resume Timestamp
-```bash
-jq '.resumed_at = "'$(date -u +%Y-%m-%dT%H:%M:%SZ)'"' .workflow/active/WFS-session/workflow-session.json > temp.json
-mv temp.json .workflow/active/WFS-session/workflow-session.json
-```
-
-## Simple Bash Commands
+## Simple Commands
 
 ### Basic Operations
-- **List sessions**: `ls .workflow/active/WFS-*`
-- **Check status**: `jq -r '.status' session.json`
-- **Find recent**: `ls -t .workflow/active/*/workflow-session.json | head -1`
-- **Update status**: `jq '.status = "active"' session.json > temp.json`
-- **Add timestamp**: `jq '.resumed_at = "'$(date -u +%Y-%m-%dT%H:%M:%SZ)'"'`
+- **List sessions**: `ccw session list --location active`
+- **Check status**: `ccw session read WFS-xxx --type session`
+- **Update status**: `ccw session status WFS-xxx active`
 
 ### Resume Result
 ```