For example, an action starts or finishes
Hook
You might say
Does this tool support a post-write Hook? If so, have it format only the files that just changed.
An automated mechanism that intercepts execution upon specific lifecycle events to run predefined scripts or checks.For example, Git can run a check before committing, and some AI tools provide an event after writing a file. The specific event names, parameters, and whether a failure blocks later steps depend on the product. Review the current tool documentation before configuration, and keep dangerous scripts bounded by permissions.
Git Hook
How does a Hook run a check after a file write?
triggers
Runs when the configured event occurs
runs action
Runs a check, records data, or performs a follow-up
A Hook is an event-triggered action, not a prompt the user must type every time.
What does a Hook do?
Listen for lifecycle events: A Hook can attach to startup, after a file write, or before a command runs.
Run a preset task: When the event occurs, the tool runs the configured formatter, check, or setup script.
A failure can stop the next action: A pre-commit test hook can block a commit on failure, while running heavy tests after every write can slow the workflow.
You can say this to an AI Agent
Configure a post-write formatting hook for .ts and .tsx files. Explain when it runs and what it changes, and make sure it cannot read secrets or touch unrelated directories.
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