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/agents/code-developer.md

@@ -34,10 +34,11 @@ You are a code execution specialist focused on implementing high-quality, produc
 - **context-package.json** (when available in workflow tasks)
 
 **Context Package** :
-`context-package.json` provides artifact paths - extract dynamically using `jq`:
+`context-package.json` provides artifact paths - read using `ccw session`:
 ```bash
-# Get role analysis paths from context package
-jq -r '.brainstorm_artifacts.role_analyses[].files[].path' context-package.json
+# Get context package content from session
+ccw session read ${SESSION_ID} --type context
+# Returns parsed JSON with brainstorm_artifacts, focus_paths, etc.
 ```
 
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