STOP running your checks in harness hooks

YouTube · Watch/Read · (gathered 2026-10-14)

• Matt Pocock advises against running automated agent checks in harness hooks on every file edit, as this is “incredibly noisy,” slow, and often tells the agent what it already knows.
• He recommends placing these automated checks in pre-commit hooks instead, which batches feedback to the agent at the right moment (when it commits) and encourages committing.
• Pre-commit checks should be fast (ideally under 3 seconds) to avoid slowing down the agent, with larger, more time-consuming checks delegated to CI before PR merges.