Open Source all native Swift harness (NO Electron!)

QuillCode is an open-source native Mac coding-agent application written in Swift and AppKit that emphasizes local control over files, terminals, worktrees, browsers, logs, automations, and plugins while using remote language models for inference. Its creator argues that this approach addresses limitations of web-based agents, which cannot directly operate on a user’s machine, and avoids the performance and interface compromises associated with Electron applications. The project includes verified self-updates, roughly 60,000 lines of Swift, 1,600 tests, and more than 680 merged pull requests. Through TrustedRouter, users can select models based on cost and task complexity, with Socrates 1.1 recommended for its Terminal-Bench Hard performance. Although model computation remains remote, QuillCode keeps filesystem access local and provides a verifiable prompt path and gateway attestations intended to let users inspect where sensitive repository data is sent; its related router, evaluation tools, and proxy are also open source.

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