Fixing a faulty hook
Now wire one up yourself. The editor holds a half-finished PreToolUse hook in .claude/settings.json that's meant to block reads of the .env file, but two things are wrong:
- The matcher only watches
Read, soGrepcould still leak the file's contents - The
commandfield is empty
Fix both in the editor, then press Check to validate your JSON and the hook's shape, so you can keep adjusting until every check passes.
Hints
A matcher can watch several tools at once with the pipe character, as in
Read|Grep.The
commandis the script Claude Code runs when the hook fires, so it can't be left empty. A minimal blocker is enough here — for exampleexit 2, which tells Claude Code to block the read.
Deze oefening maakt deel uit van de cursus
Claude Code in Action
Interactieve oefening met praktijkervaring
Zet theorie om in actie met een van onze interactieve oefeningen
Begin oefening