Function runPreToolUseHooks

src/services/tools/toolHooks.ts:435–650

(
  toolUseContext: ToolUseContext,
  tool: Tool,
  processedInput: Record<string, unknown>,
  toolUseID: string,
  messageId: string,
  requestId: string | undefined,
  mcpServerType: McpServerType,
  mcpServerBaseUrl: string | undefined,
)

}

export async function* runPreToolUseHooks(
  toolUseContext: ToolUseContext,
  tool: Tool,
  processedInput: Record<string, unknown>,
  toolUseID: string,
  messageId: string,
  requestId: string | undefined,
  mcpServerType: McpServerType,
  mcpServerBaseUrl: string | undefined,
): AsyncGenerator<
  | {
      type: 'message'
      message: MessageUpdateLazy<
        AttachmentMessage | ProgressMessage<HookProgress>
      >
    }
  | { type: 'hookPermissionResult'; hookPermissionResult: PermissionResult }
  | { type: 'hookUpdatedInput'; updatedInput: Record<string, unknown> }
  | { type: 'preventContinuation'; shouldPreventContinuation: boolean }
  | { type: 'stopReason'; stopReason: string }
  | {
      type: 'additionalContext'
      message: MessageUpdateLazy<AttachmentMessage>
    }
  // stop execution
  | { type: 'stop' }
> {
  const hookStartTime = Date.now()
  try {
    const appState = toolUseContext.getAppState()

    for await (const result of executePreToolHooks(
      tool.name,
      toolUseID,
      processedInput,
      toolUseContext,
      appState.toolPermissionContext.mode,
      toolUseContext.abortController.signal,
      undefined, // timeoutMs - use default
      toolUseContext.requestPrompt,
      tool.getToolUseSummary?.(processedInput),
    )) {
      try {
        if (result.message) {
          yield { type: 'message', message: { message: result.message } }
        }
        if (result.blockingError) {
          const denialMessage = getPreToolHookBlockingMessage(
            `PreToolUse:${tool.name}`,
            result.blockingError,
          )
          yield {
            type: 'hookPermissionResult',
            hookPermissionResult: {
              behavior: 'deny',
              message: denialMessage,
              decisionReason: {
                type: 'hook',