test-v174-hook-count

A double-fire bug in skill hooks causes the PostToolUse hook to trigger more than once for a single Write matcher. This skill verifies the execution count and validates the fix by checking a counter file to confirm the hook triggers only once.

To verify a hook execution count fix, run this test skill to validate that the PostToolUse hook executes exactly once for a Write matcher. It checks the counter file and reports whether the hook double-firing is resolved.

Hook double-firing in testing occurs when a hook like PostToolUse executes multiple times for one event. Scripts detect it by writing to a counter file on each execution and then checking the final count to verify it matches the expected single trigger.

Yes, you can use this hook verification test as a regression safeguard. Running it after code changes confirms the PostToolUse double-fire fix remains effective and prevents the bug from reappearing in future updates.

Before testing PostToolUse hook execution counts, you need the hook configured with a Write matcher and a counter file to track triggers. The test skill then runs the verification and reports the outcome based on the counter file's value.