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

Geiger is a new open-source tool that scans a machine for all AI agents, harnesses, MCP servers, plugins, and AI extensions. It prints a simple report revealing what each one can access, such as executing commands, holding sensitive data, accessing the file system, or reaching out over the network. The scanner reads the machine's configuration files and directories but makes no changes.

It flags any new agents or changes without needing to be installed, requiring no account or telemetry. Geiger can generate one-click desktop clients and HTML reports with actionable remediation steps. Organizations can use it to maintain a baseline inventory and detect any drift over time, notifying them of unauthorized changes.

Geiger does not rely on any external servers, keeping the output local and transparent. It is MIT-licensed, built using JavaScript with zero dependencies, and maintains a stable JSON schema for compatibility.