Two New Open Source Tools for AI Agent Security and Optimization

The r/openclaw community has shared two open source tools for AI agent developers: AI Agent Defense Kit (shipped) and AgentGuard (in development).
AI Agent Defense Kit
This is a free security toolkit with runtime protection skills for AI agents. Available skills include:
skill-auditor- Audit skills before installation for security red flagsurl-preflight- Check URLs before your agent fetches themcontent-scanner- Scan content for hidden instructionssocial-engineering-detector- Detect manipulation tactics in messagesdependency-checker- Check packages for supply chain attacks
The repository is available at: https://github.com/moebius-ansa/ai-agent-defense-kit
AgentGuard
This toolkit (in development) addresses three common problems: unpredictable costs from autonomous AI systems burning tokens, lack of audit logs showing what agents are doing, and inbound security threats before content reaches agents.
Planned launch features include:
- Cost Estimator - Auto-calculates monthly costs by model + usage level
- Model Comparison - Compares 20+ models across providers with quality ratings; claims to find 90%+ savings with equivalent quality
- Security Scanner - Detects prompt injection, jailbreaks, system prompt leaks and other attacks before they hit your agent
- Activity Monitor - Tracks file changes, API calls, process activity
- Budget and Activity Alerts - Get notifications on Discord, Slack, Telegram, etc. when detecting unusual activity or major cost spikes
Installation will be via: pip install agentguard
The tool will feature an intuitive TUI interface and agent mode that lets your agent operate the platform for you.
These tools address practical concerns for developers running AI agents, particularly around security monitoring and cost management.
📖 Read the full source: r/openclaw
👀 See Also

AI Sandbox Manager: LXC-Based Sandbox for Codex with GPU Passthrough and Computer Use on Headless Linux
ai-sandbox-manager is an open-source LXC-based sandbox for Codex agents on headless Linux. It provides GPU passthrough, full sudo access, persistent environments, and computer use via CUA, all while isolating the agent from the host OS.

OpenClaw Guild: Multi-user AI agent server for teams
OpenClaw Guild extends single-user OpenClaw into a multi-user AI server with role-based access control, isolated data per agent, and a 4-tier memory system. It includes a web admin dashboard and Docker-compose deployment for 15-minute setup.

Claude VS Code Extension Reasoning Effort Slider Sends Inconsistent Values
The reasoning effort slider in the Claude VS Code extension sends inconsistent numeric values to the model, with non-monotonic mapping where moving the slider up can send a lower number.

Steerling-8B: An Interpretable Language Model with Token-Level Attribution
Guide Labs released Steerling-8B, an 8-billion-parameter language model trained on 1.35 trillion tokens that can trace any generated token to input context, human-understandable concepts, and training data sources. The model achieves competitive performance with models trained on 2-7× more data.