Q4 of 60 — CCA Practice Exam

Developer Productivity with Claude

Your team has deployed a developer productivity agent using the Claude Agent SDK. The agent automates file operations across the codebase, including writes, edits, and shell commands. A PreToolUse hook runs an external compliance validation service before any write operation — the hook performs an API call to the validation service and typically completes in 2–3 seconds. After a week in production, developers begin reporting that roughly 15% of their agent sessions terminate unexpectedly mid-task. Examining the logs, you see the sessions consistently fail during the compliance hook execution, and the error indicates the hook did not return within the allowed time. What is the most effective architectural fix?

A. Replace the synchronous compliance API call inside the hook with an asynchronous fire-and-forget pattern, logging validation results without blocking the agent from proceeding to the write operation.

B. Increase the timeout value in the HookMatcher configuration to match the compliance service's latency, and use the AbortSignal from the callback's third argument to handle cancellation cleanly.

C. Move the compliance validation logic from the PreToolUse hook into the system prompt, instructing the agent to self-validate file paths against compliance rules before issuing any write or edit tool call.

D. Register a second PostToolUse hook that calls the compliance service after each write completes, rolling back any non-compliant file changes detected after execution has already occurred.