Lesson 3 · A hook that blocks · step 2 of 1101Read02Exit code 203Task 104Other exit codes do not block05Task 206Task 307The block decision08Task 409Task 510Recap11TakeawayReadExit code 2Log in to read this lesson. A free account opens the introductory chapter.←How a hook says no, and makes sure Claude hears whyWhich script stops the command→