Experience Agent Cat, developed by trappist, a Windows desktop assistant that embeds Large Language Model access directly on the desktop. It queries multiple LLM providers, analyzes selected screen regions with OCR, and processes local files for summarization or data extraction without leaving active applications. The app supports multiple models, customizable global hotkeys, local chat history storage, and a bring-your-own-key API model for privacy control. Designed for power users, developers, and researchers who need rapid, context-aware AI assistance integrated into daily desktop workflows.

What does the app actually do on a Windows desktop?

The app functions as a desktop overlay that connects local work to external LLMs. Core capabilities include multi-model access (OpenAI, Anthropic, Google, Groq), selective screen capture with OCR, and file ingestion for PDFs, text, and images. Practical outcomes are instant, context-aware queries about code, screenshots, or documents without switching to a browser. A compact feature list clarifies its role:

• Multi-model switching for different LLM outputs
• Manual screen selection for focused analysis
• Local chat history storage for retrieval

How does the app interact with the system and workflows?

The app appears as a native overlay, designed for current Windows desktops and activated via customizable global hotkeys. The developer describes fluid animations and a direct overlay model, so the assistant summons over active applications rather than opening a separate browser tab. It requires an active internet connection to reach provider APIs and uses manual screen capture to avoid automatic screen reads, preserving user control over when content is exposed to external models.

Is it safe to use and how much setup does it demand?

Safety is oriented around local control: API keys and chat histories are stored on the machine, and the screen-capture tool only runs when the user triggers it. The bring-your-own-key design places configuration tasks with the user, which suits technically competent operators. For less technical users, managing multiple provider keys and understanding model differences may present a setup hurdle before productive use.

Who should choose this tool and what trade-off to expect

Agent Cat is a practical choice for technically minded Windows users who want immediate, desktop-integrated access to multiple LLMs. The trade-off is configuration responsibility: users supply and manage API keys and must accept an internet connection for model queries. For those comfortable with key management and external APIs, the app delivers a focused, desktop-first LLM workflow that centers on privacy-conscious local control.