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>

commands/README.md

@@ -22,6 +22,8 @@ Slash commands for quick actions. User-invoked (type `/command` to trigger).
 | `/workflow` | `/workflows`, `/wf` | List and describe workflows |
 | `/skill-info` | `/skill`, `/skills-info` | Show skill information |
 | `/agent-info` | `/agent`, `/agents` | Show agent information |
+| `/diff` | `/config-diff`, `/compare` | Compare config with backup |
+| `/template` | `/templates`, `/session-template` | Manage session templates |
 | `/maintain` | `/maintenance`, `/admin` | Configuration maintenance |
 | `/programmer` | | Code development tasks |
 | `/gcal` | `/calendar`, `/cal` | Google Calendar access |

commands/diff.md

@@ -0,0 +1,34 @@
+---
+name: diff
+description: Compare configuration with backup
+aliases: [config-diff, compare]
+invokes: command:diff
+---
+
+# Diff Command
+
+Compare current configuration with a backup to see what changed.
+
+## Usage
+
+```
+/diff                       # Compare with latest backup
+/diff --backup <file>       # Compare with specific backup
+/diff --list                # List available backups
+/diff --json                # Output as JSON
+```
+
+## Implementation
+
+```bash
+python3 ~/.claude/automation/config-diff.py [options]
+```
+
+## Output
+
+Shows changes grouped by type:
+- **Added** - New files in current config
+- **Removed** - Files that existed in backup but not now
+- **Changed** - Modified files with details
+
+For JSON files, shows which keys were added/removed/changed.

commands/template.md

@@ -0,0 +1,44 @@
+---
+name: template
+description: Manage session templates for common workflows
+aliases: [templates, session-template]
+invokes: command:template
+---
+
+# Template Command
+
+Create and use session templates for repeatable workflows.
+
+## Usage
+
+```
+/template                   # List all templates
+/template --use <name>      # Display template for use
+/template --create <name>   # Create new template
+/template --delete <name>   # Delete a template
+```
+
+## Implementation
+
+```bash
+python3 ~/.claude/automation/session-template.py [options]
+```
+
+## Built-in Templates
+
+| Name | Category | Description |
+|------|----------|-------------|
+| `daily-standup` | routine | Morning status check and planning |
+| `code-review` | development | Review code changes in a project |
+| `troubleshoot` | debugging | Debug an issue systematically |
+| `deploy` | operations | Deploy application to environment |
+
+## Template Contents
+
+Each template includes:
+- **Description** - What the template is for
+- **Category** - Grouping for organization
+- **Context level** - How much context to gather
+- **Initial commands** - Commands to run at start
+- **Checklist** - Steps to follow
+- **Prompt template** - Suggested starting prompt