CCDV-F Deep Dive 23/25: Claude Hooks (Domain 7, 1.0%) | Claude Certified Developer Foundations

Claude Hooks explained for the CCDV-F exam: a Claude Code hook is a command Claude Code runs automatically at a lifecycle event, so it enforces a rule where a prompt or CLAUDE.md line is only advice; to block a destructive command, use a PreToolUse hook that exits with code 2 or returns a deny decision (exit 1 does not block), and remember that deny and ask rules still apply when a hook says allow, a blocking hook beats an allow rule, and hooks should be layered with permissions, sandboxing and least privilege. Claude Hooks carries 1.0% of the Claude Certified Developer Foundations (CCDV-F) exam weight, in Domain 7: Security and Safety (8.1%). This exam-prep deep dive is for developers preparing for the Claude Certified Developer Foundations (CCDV-F) exam who want more than the short Claude Hooks lesson. It covers why a hook is enforcement where an instruction is advice, the main lifecycle events, where hooks are configured and the workspace trust rules, the exit-code rule, structured allow, deny, ask and defer decisions, how hooks interact with permission rules and permission modes, a worked example that blocks a destructive shell command, and why hooks must be combined with other security layers. It is an independent study video, not official Anthropic material, and the practice questions are original. What you will learn: • Why a hook enforces a rule while a prompt or CLAUDE.md line is only advice • The main hook events, and why PostToolUse cannot undo an action • Where hooks are configured, and how workspace trust applies • The exit-code rule: exit 2 blocks, exit 1 does not • Structured allow, deny, ask and defer decisions, and which one wins • How hooks and permission rules combine: tighten, never loosen • A worked example: a pre-tool hook that blocks rm -rf • Why hooks need permissions, sandboxing and least privilege alongside them CHAPTERS 00:00 Claude Hooks deep dive for the CCDV-F exam 00:42 Hook versus prompt or CLAUDE.md: deterministic enforcement versus advice 01:26 Claude Code hook events: SessionStart, UserPromptSubmit, PreToolUse, PostToolUse, Stop 02:10 Where Claude Code hooks are configured: settings scopes, plugins, Agent SDK, workspace trust 03:03 Hook exit codes: exit 2 blocks, exit 1 is non-blocking, exit 0 means no objection 03:49 Structured hook decisions: allow, deny, ask, defer, and which one wins 04:39 Worked example: a PreToolUse hook that blocks a destructive shell command 05:26 How hooks and permission rules interact: deny rules still apply, a blocking hook beats allow 06:12 Defense in depth: combine hooks with permission rules, sandboxing, least privilege and managed settings 07:00 Practice questions and answers: Claude Hooks CCDV-F deep-dive series: video 23 of 25. Each deep dive goes further than the matching short lesson in the CCDV-F full course; watch that lesson first if the topic is new. Previous: CCDV-F Deep Dive 22/25, Identity, Secrets, and Key Management:    • CCDV-F Deep Dive 22/25: Identity, Secrets,...   Go deeper on this channel: CCDV-F 23/25: Claude Hooks (Domain 7, 1.0%) | Claude Certified Developer Foundations:    • CCDV-F 23/25: Claude Hooks (Domain 7, 1.0%...   Exam format: 53 multiple-choice and multiple-response questions, 120 minutes, pass mark 720 of 1000 (scaled). Weights and format come from third-party summaries of Anthropic's CCDV-F Exam Guide v1.0 (July 2026); confirm them against Anthropic's official guide before you sit the exam. Subscribe to Core Concept Learning for clear, visual explanations of AI and software engineering concepts. #CCDVF #ClaudeCertifiedDeveloper #ClaudeCode