AgentGuard

AgentGuard is a free and open-source local desktop application designed to provide guardrails for AI coding agents. The tool focuses on enhancing security and efficiency by controlling and monitoring prompts and requests made by AI agents. Its primary features are Guardian Agent, which offers data loss prevention on prompts, tool inputs, and file reads, and Token Saver, which compresses verbose outputs and reduces unnecessary token usage before requests are sent to the AI model.

Guardian Agent intercepts requests to block secrets, risky dependency installs, and oversized requests, applying token caps and flagging vulnerabilities in dependencies. It also provides update advice for outdated dependency pins. Token Saver reduces the context size by compressing shell outputs, caching repeated file reads, and shrinking noisy responses from search, diff, or JSON operations. These optimizations are tracked, with logs and analytics available to review token savings and event histories.

AgentGuard includes review surfaces such as Logs, Analytics, and Garden. Logs provide a compact, exportable event history detailing Guardian and Token Saver actions. Analytics offer charts that track models used, token totals, savings, and trends in latency and tool calls. The Garden feature visualizes project activity, mapping modules, files, symbols, and import relationships.

The application supports integration with three AI coding agents: Claude Code, Codex CLI, and Cursor. Guardian Agent's controls extend across all three integrations, while Token Saver offers the most extensive support for Claude Code. Delivery options include downloadable versions for Mac and Ubuntu, with the option to build from source using npm and Tauri for other operating systems. AgentGuard is positioned as a tool for developers seeking local data loss prevention, dependency protection, token optimization, and observability for workflows involving AI coding agents.