The Grant That Keeps Evaporating: TCC, Code Signing, and AI Agents on macOS

How to let a headless AI agent read and write your Reminders and Calendar on macOS — the bundle-identity trick that makes TCC grant access, and the code-signing tax nobody warns you about.

July 11, 2026 · 6 min · Robert Cao

The Day Our AI Fleet Fixed Its Own Tooling

A blind spot in our own tooling, root-caused and shipped in one afternoon — and the tool caught its author’s mistake the second it went live.

July 10, 2026 · 6 min · Robert Cao