docs: add Clauditor security watchdog documentation

- Add dedicated Clauditor doc in docs/security/
- Add VPS hardening section referencing Clauditor
- Clauditor provides tamper-evident logging for production deployments

docs/security/clauditor.md

@@ -0,0 +1,105 @@
+---
+summary: "Tamper-resistant audit watchdog for VPS deployments"
+read_when:
+  - You want to detect if your agent is compromised
+  - You need tamper-evident logging for Clawdbot activity
+  - You're running Clawdbot on a production VPS
+---
+# Clauditor
+
+Clauditor is a security watchdog that monitors filesystem activity and creates tamper-evident logs. Even if Clawdbot is compromised, it cannot stop the watchdog, forge log entries, or delete evidence.
+
+**GitHub:** [apollostreetcompany/clauditor](https://github.com/apollostreetcompany/clauditor)  
+**ClawdHub:** `clawdhub install clauditor`
+
+## Why Clauditor?
+
+When you give an AI agent access to your system, you're trusting it not to:
+- Exfiltrate sensitive data (credentials, keys, personal files)
+- Install persistence mechanisms (cron jobs, SSH keys)
+- Cover its tracks by deleting logs
+
+Clauditor creates an independent audit trail that the agent **cannot tamper with**, even if fully compromised.
+
+## Security Model
+
+| Component | Owner | Clawdbot Access |
+|-----------|-------|-----------------|
+| Daemon | sysaudit user | ❌ Cannot kill |
+| HMAC Key | root:sysaudit | ❌ Cannot read |
+| Log Directory | sysaudit | ❌ Cannot write |
+| Logs | sysaudit | ✅ Can read (tamper-evident) |
+
+The watchdog runs as a separate system user (`sysaudit`). Even with full control of the `clawdbot` account, an attacker cannot:
+- Stop the monitoring daemon
+- Forge log entries (no access to HMAC key)
+- Delete evidence (no write access to logs)
+
+## Features
+
+- **HMAC hash-chained logs** — Any tampering breaks the chain
+- **Exec monitoring** — Tracks all command executions
+- **Exfiltration detection** — Flags credential reads followed by network commands
+- **Baseline tracking** — Alerts on first-time command usage
+- **Orphan detection** — Flags commands running when no Clawdbot session is active
+- **Digest reports** — Human-readable security summaries
+
+## Installation
+
+Clauditor includes an interactive wizard that guides you through installation:
+
+```bash
+# Clone and build
+git clone https://github.com/apollostreetcompany/clauditor.git
+cd clauditor
+cargo build --release
+
+# Run the wizard (follow prompts)
+./target/release/clauditor wizard status
+./target/release/clauditor wizard next
+# Run the sudo command it shows, then:
+./target/release/clauditor wizard verify
+# Repeat until complete
+```
+
+Or use the automated script:
+
+```bash
+sudo bash wizard/wizard.sh
+```
+
+## Usage
+
+### Check daemon status
+```bash
+systemctl status systemd-journaldd
+```
+
+### Generate security report
+```bash
+# Silent mode (only outputs if issues found)
+clauditor digest --log /var/lib/.sysd/.audit/events.log --key /etc/sysaudit/key
+
+# Verbose mode (full report)
+clauditor digest --log /var/lib/.sysd/.audit/events.log --key /etc/sysaudit/key --verbose
+```
+
+### Automated daily digest
+```bash
+# Add to root's crontab
+0 6 * * * /usr/local/sbin/systemd-journaldd digest --log /var/lib/.sysd/.audit/events.log --key /etc/sysaudit/key || echo "Anomalies detected" | mail -s "Clauditor Alert" you@example.com
+```
+
+## Requirements
+
+- Linux with systemd
+- Rust toolchain (for building)
+- Root access (for installation)
+
+## Recommended For
+
+- **Production VPS deployments** — Where Clawdbot has access to sensitive data
+- **Multi-user environments** — Where audit trails matter
+- **High-trust setups** — Where you've given Clawdbot elevated permissions
+
+For local development or sandboxed environments, Clauditor is optional but still useful for understanding agent behavior patterns.

docs/vps.md

@@ -32,6 +32,18 @@ deployments work at a high level.
 Remote access: [Gateway remote](/gateway/remote)  
 Platforms hub: [Platforms](/platforms)
 
+## Hardening your VPS
+
+Running Clawdbot on a production VPS? Consider these security measures:
+
+- **SSH key-only auth** — Disable password authentication
+- **fail2ban** — Auto-ban IPs after failed login attempts
+- **Clauditor** — Tamper-resistant audit watchdog for agent activity monitoring
+
+Clauditor creates an independent audit trail that the agent cannot tamper with, even if compromised. It tracks command executions, detects exfiltration patterns, and alerts on suspicious behavior.
+
+Docs: [Clauditor](/security/clauditor)
+
 ## Using nodes with a VPS
 
 You can keep the Gateway in the cloud and pair **nodes** on your local devices