utils.ts

tools/utils.ts

tool-system

Lines

1105

Bytes

Exports

Imports

Keywords

What this is

This page documents one file from the repository and includes its full source so you can read it without leaving the docs site.

Beginner explanation

This file is part of the tool layer, which means it describes actions the system can perform for the user or model.

How it is used

Start from the exports list and related files. Those are the easiest clues for where this file fits into the system.

Expert explanation

Architecturally, this file intersects with tool-system. It contains 41 lines, 1 detected imports, and 2 detected exports.

Important relationships

Detected exports

tagMessagesWithToolUseID
getToolUseIDFromParentMessage

Keywords

messagemessagestooluseblockattachmentmessagesystemmessageusermessagetooltooluseidblockassistantmessage

Detected imports

src/types/message.js

Source notes

This page embeds the full file contents. Small or leaf files are still indexed honestly instead of being over-explained.

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Full source

import type {
  AssistantMessage,
  AttachmentMessage,
  SystemMessage,
  UserMessage,
} from 'src/types/message.js'

/**
 * Tags user messages with a sourceToolUseID so they stay transient until the tool resolves.
 * This prevents the "is running" message from being duplicated in the UI.
 */
export function tagMessagesWithToolUseID(
  messages: (UserMessage | AttachmentMessage | SystemMessage)[],
  toolUseID: string | undefined,
): (UserMessage | AttachmentMessage | SystemMessage)[] {
  if (!toolUseID) {
    return messages
  }
  return messages.map(m => {
    if (m.type === 'user') {
      return { ...m, sourceToolUseID: toolUseID }
    }
    return m
  })
}

/**
 * Extracts the tool use ID from a parent message for a given tool name.
 */
export function getToolUseIDFromParentMessage(
  parentMessage: AssistantMessage,
  toolName: string,
): string | undefined {
  const toolUseBlock = parentMessage.message.content.find(
    block => block.type === 'tool_use' && block.name === toolName,
  )
  return toolUseBlock && toolUseBlock.type === 'tool_use'
    ? toolUseBlock.id
    : undefined
}