Add /diff and /template commands

- /diff command to compare config with backups
  - Shows added/removed/changed files
  - JSON-aware comparison for config files
  - List available backups
- /template command for session templates
  - Built-in templates: daily-standup, code-review, troubleshoot, deploy
  - Each template includes checklist, initial commands, prompt
  - Create custom templates interactively or non-interactively
- Updated shell completions with 21 aliases total
- Test suite now covers 29 tests

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

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

automation/completions.bash

@@ -69,6 +69,18 @@ _claude_agent_info() {
     COMPREPLY=($(compgen -W "--tree --list" -- "${cur}"))
 }
 
+_claude_diff() {
+    local cur="${COMP_WORDS[COMP_CWORD]}"
+
+    COMPREPLY=($(compgen -W "--backup --list --json" -- "${cur}"))
+}
+
+_claude_template() {
+    local cur="${COMP_WORDS[COMP_CWORD]}"
+
+    COMPREPLY=($(compgen -W "--list --create --use --delete" -- "${cur}"))
+}
+
 _claude_memory_add() {
     local cur="${COMP_WORDS[COMP_CWORD]}"
     local prev="${COMP_WORDS[COMP_CWORD-1]}"
@@ -108,6 +120,8 @@ complete -F _claude_upgrade upgrade.sh
 complete -F _claude_workflow workflow-info.py
 complete -F _claude_skill_info skill-info.py
 complete -F _claude_agent_info agent-info.py
+complete -F _claude_diff config-diff.py
+complete -F _claude_template session-template.py
 
 # Alias completions for convenience
 alias claude-validate='~/.claude/automation/validate-setup.sh'
@@ -130,8 +144,10 @@ alias claude-upgrade='~/.claude/automation/upgrade.sh'
 alias claude-workflow='python3 ~/.claude/automation/workflow-info.py'
 alias claude-skill='python3 ~/.claude/automation/skill-info.py'
 alias claude-agent='python3 ~/.claude/automation/agent-info.py'
+alias claude-diff='python3 ~/.claude/automation/config-diff.py'
+alias claude-template='python3 ~/.claude/automation/session-template.py'
 
 echo "Claude Code completions loaded. Available aliases:"
 echo "  claude-{validate,status,backup,restore,clean,memory-add,memory-list,search}"
 echo "  claude-{history,install,test,maintenance,log,debug,export,mcp,upgrade}"
-echo "  claude-{workflow,skill,agent}"
+echo "  claude-{workflow,skill,agent,diff,template}"