Function buildToolNameMap

src/utils/toolResultStorage.ts:536–549

* Walk messages and build tool_use_id → tool_name from assistant tool_use * blocks. tool_use always precedes its tool_result (model calls, then result * arrives), so by the time budget enforcement sees a result, its name is known.

(messages: Message[])

 * arrives), so by the time budget enforcement sees a result, its name is known.
 */
function buildToolNameMap(messages: Message[]): Map<string, string> {
  const map = new Map<string, string>()
  for (const message of messages) {
    if (message.type !== 'assistant') continue
    const content = message.message.content
    if (!Array.isArray(content)) continue
    for (const block of content) {
      if (block.type === 'tool_use') {
        map.set(block.id, block.name)
      }
    }
  }
  return map
}

/**
 * Extract candidate tool_result blocks from a single user message: blocks