KnightClaw: Local Security Extension for OpenClaw Agents
KnightClaw is a security extension designed to protect OpenClaw AI coding agents from adversarial prompts. The tool addresses a specific threat model where a single malicious message in the context window can cause an agent to follow attacker instructions instead of user commands.
Core Features
KnightClaw operates as a drop-in extension with no configuration required, no API keys, and no cloud dependency. It intercepts every message before it reaches the agent.
Detection System
The guard uses an 8-layer hybrid detection approach:
- Regex patterns
- Homoglyph detection
- Boundary token analysis
- Perplexity scoring
- Entropy analysis
- Heuristics
- Semantic embeddings (using a local, quantized BGE model)
Blocks occur in microseconds.
Additional Security Measures
- Egress redaction: Strips secrets from outbound responses before they leave the agent
- Hash-chained audit logs: Tamper-proof, append-only logs with full timeline of every block, allow, and config change
- Velocity circuit breaker: 10 blocks in 60 seconds triggers automatic lockdown with no manual intervention
- Kill switch: One command stops everything:
openclaw knight lockdown on
Technical Details
The extension runs entirely local with zero telemetry and is MIT licensed. The source is available for testing and contribution.
📖 Read the full source: r/openclaw
👀 See Also
Security Alert for Local OpenClaw Instances Without Sandboxing
A Reddit post warns that running vanilla OpenClaw instances locally without proper isolation can lead to exposed API keys, accidental file deletion, and data leaks. The source recommends sandboxing bash tools or using a managed service.
Clawvisor: Purpose-Based Authorization Layer for OpenClaw Agents
Clawvisor is an authorization layer that sits between AI agents and APIs, enforcing purpose-based authorization where agents declare intentions, users approve specific purposes, and an AI gatekeeper verifies every request against that purpose. Credentials never leave Clawvisor and agents never see them.
AI Agent Production Deletion Incidents: The Pattern and the Fix
Production deletion incidents from PocketOS, Replit, and Cursor share a common access pattern. Fix: agents get no production credentials; all changes flow through CI/CD with a policy-scoring gate.
Rules of the Claw: Open Source Security Rule Set for OpenClaw Agents
An open source JSON rule set with 139 security rules that blocks destructive commands, protects credential files, and guards instruction files from unauthorized agent edits. It operates with zero LLM dependency using regex patterns at the tool layer.