setup

ctx Setup

Install, upgrade, or verify the ctx persistent memory system.

Check if ctx binary is in PATH and get current version:
```
command -v ctx && ctx version
```

Check for updates from GitHub releases:

bash ${CLAUDE_PLUGIN_ROOT}/scripts/check-update.sh

If binary not found OR an update is available, install/upgrade from GitHub releases:
```
bash ${CLAUDE_PLUGIN_ROOT}/scripts/install-binary.sh
```
Verify database exists:
```
ls -la ~/.ctx/store.db
```
If database missing, initialize:
```
ctx init
```
Show current status:
```
ctx status
```
Report results to user: binary location, version, database path, node count, tier breakdown. If an upgrade was performed, mention the old and new versions.