ToolVerificationHook

reference

1 min readUpdated 2026-07-28

Kind: Type

Source: atloria-monorepo/libs/agent-core/src/runtime/types.ts

Called after a tool executes. Can block the tool output from reaching the model and inject corrective feedback instead.

Inspired by Claude Code's hooks system (exit code 2 = block + correct).

Return null to pass through normally. Return a string to REPLACE the tool output with corrective feedback.

Definition

ts
(
  toolName: string,
  toolInput: string,
  toolOutput: string,
) => string | null | Promise<string | null>