Git Diff Patcher Bridge connects ChatGPT to a local GDP Desktop session or a seeded Demo Workspace. ChatGPT can inspect repository context, read allowed files, search text, diagnose unified diffs with Patch Doctor, and queue patch proposals for local review. The bridge never applies, commits, pushes, resets, cleans, deletes, rolls back, or runs terminal commands on its own. All repository-changing actions remain under the user’s control inside GDP Desktop.