Show HN: Geiger – See every AI agent on your machine and what it can touch

Geiger is a command-line tool that inventories all AI agents, plugins, and extensions running on a machine and identifies what files and systems each can access, requiring only a single read-only command with no installation or telemetry. The tool addresses growing security concerns around the rapid proliferation of AI agent ecosystems, helping users understand what programs on their machine can execute code, access credentials, and reach their filesystem. It scans configurations across multiple platforms including Claude Code, VS Code, Cursor, and other AI tools, presenting findings in plain language about which agents can execute commands or hold sensitive information.