refactor(cmdb-assistant): extract skills and slim commands

- Extract 9 skill files from command knowledge:
  - mcp-tools-reference.md: Complete NetBox MCP tools reference
  - system-discovery.md: Bash commands for system info gathering
  - device-registration.md: Device registration workflow
  - sync-workflow.md: Machine sync process
  - audit-workflow.md: Data quality audit checks
  - ip-management.md: IP/prefix management and conflict detection
  - topology-generation.md: Mermaid diagram generation
  - change-audit.md: NetBox change audit workflow
  - visual-header.md: Standard visual header pattern

- Slim all 11 commands to under 60 lines:
  - cmdb-sync.md: 348 -> 57 lines
  - cmdb-register.md: 334 -> 51 lines
  - ip-conflicts.md: 238 -> 58 lines
  - cmdb-audit.md: 207 -> 58 lines
  - cmdb-topology.md: 194 -> 54 lines
  - initial-setup.md: 176 -> 74 lines
  - change-audit.md: 175 -> 57 lines
  - cmdb-site.md: 68 -> 50 lines
  - cmdb-ip.md: 65 -> 52 lines
  - cmdb-device.md: 64 -> 55 lines
  - cmdb-search.md: 46 lines (unchanged)

- Update agent to reference skills for best practices
- Preserve existing netbox-patterns skill

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

plugins/cmdb-assistant/skills/device-registration.md

@@ -0,0 +1,177 @@
+# Device Registration Skill
+
+How to register devices into NetBox.
+
+## Prerequisites
+
+Load these skills:
+- `system-discovery` - Bash commands for gathering system info
+- `netbox-patterns` - Best practices for data quality
+- `mcp-tools-reference` - MCP tool reference
+
+## Registration Workflow
+
+### Phase 1: System Discovery
+
+Use commands from `system-discovery` skill to gather:
+- Hostname, OS, hardware model, serial number
+- CPU, memory, disk
+- Network interfaces with IPs
+- Running Docker containers
+
+### Phase 2: Pre-Registration Checks
+
+1. **Check if device exists:**
+   ```
+   dcim_list_devices name=<hostname>
+   ```
+   If exists, suggest `/cmdb-sync` instead.
+
+2. **Verify/Create site:**
+   ```
+   dcim_list_sites name=<site-name>
+   ```
+   If not found, list available sites or offer to create.
+
+3. **Verify/Create platform:**
+   ```
+   dcim_list_platforms name=<platform-name>
+   ```
+   Create if not exists with `dcim_create_platform`.
+
+4. **Verify/Create device role:**
+   ```
+   dcim_list_device_roles name=<role-name>
+   ```
+
+### Phase 3: Device Creation
+
+1. **Get/Create manufacturer and device type:**
+   ```
+   dcim_list_manufacturers name="<manufacturer>"
+   dcim_list_device_types manufacturer_id=X model="<model>"
+   ```
+
+2. **Create device:**
+   ```
+   dcim_create_device
+     name=<hostname>
+     device_type=<device_type_id>
+     role=<role_id>
+     site=<site_id>
+     platform=<platform_id>
+     tenant=<tenant_id>  # if provided
+     serial=<serial>
+     description="Registered via cmdb-assistant"
+   ```
+
+3. **Create interfaces:**
+   For each network interface:
+   ```
+   dcim_create_interface
+     device=<device_id>
+     name=<interface_name>
+     type=<type>
+     mac_address=<mac>
+     enabled=true
+   ```
+
+4. **Create IP addresses:**
+   For each IP:
+   ```
+   ipam_create_ip_address
+     address=<ip/prefix>
+     assigned_object_type="dcim.interface"
+     assigned_object_id=<interface_id>
+     status="active"
+   ```
+
+5. **Set primary IP:**
+   ```
+   dcim_update_device
+     id=<device_id>
+     primary_ip4=<primary_ip_id>
+   ```
+
+### Phase 4: Container Registration (if Docker)
+
+1. **Create/Get cluster type:**
+   ```
+   virt_list_cluster_types name="Docker Compose"
+   virt_create_cluster_type name="Docker Compose" slug="docker-compose"
+   ```
+
+2. **Create cluster:**
+   ```
+   virt_create_cluster
+     name=<project-name>
+     type=<cluster_type_id>
+     site=<site_id>
+     description="Docker Compose stack on <hostname>"
+   ```
+
+3. **Create VMs for containers:**
+   For each running container:
+   ```
+   virt_create_vm
+     name=<container_name>
+     cluster=<cluster_id>
+     site=<site_id>
+     role=<role_id>
+     status="active"
+     vcpus=<cpu_shares>
+     memory=<memory_mb>
+     disk=<disk_gb>
+   ```
+
+### Phase 5: Documentation
+
+Add journal entry:
+```
+extras_create_journal_entry
+  assigned_object_type="dcim.device"
+  assigned_object_id=<device_id>
+  comments="Device registered via /cmdb-register command\n\nDiscovered:\n- X network interfaces\n- Y IP addresses\n- Z Docker containers"
+```
+
+## Summary Report Template
+
+```markdown
+## Machine Registration Complete
+
+### Device Created
+- **Name:** <hostname>
+- **Site:** <site>
+- **Platform:** <platform>
+- **Role:** <role>
+- **ID:** <device_id>
+- **URL:** https://netbox.example.com/dcim/devices/<id>/
+
+### Network Interfaces
+| Interface | Type | MAC | IP Address |
+|-----------|------|-----|------------|
+| eth0 | 1000base-t | aa:bb:cc:dd:ee:ff | 192.168.1.100/24 |
+
+### Primary IP: 192.168.1.100
+
+### Docker Containers Registered (if applicable)
+**Cluster:** <cluster_name> (ID: <cluster_id>)
+
+| Container | Role | vCPUs | Memory | Status |
+|-----------|------|-------|--------|--------|
+| media_jellyfin | Media Server | 2.0 | 2048MB | Active |
+
+### Next Steps
+- Run `/cmdb-sync` periodically to keep data current
+- Run `/cmdb-audit` to check data quality
+- Add tags for classification
+```
+
+## Error Handling
+
+| Error | Action |
+|-------|--------|
+| Device already exists | Suggest `/cmdb-sync` or ask to proceed |
+| Site not found | List available sites, offer to create new |
+| Docker not available | Skip container registration, note in summary |
+| Permission denied | Note which operations failed, suggest fixes |