Method buildCleanConversationHistory

src/core/task/Task.ts:4466–4606

(
		messages: ApiMessage[],
	)

	}

	private buildCleanConversationHistory(
		messages: ApiMessage[],
	): Array<
		Anthropic.Messages.MessageParam | { type: "reasoning"; encrypted_content: string; id?: string; summary?: any[] }
	> {
		type ReasoningItemForRequest = {
			type: "reasoning"
			encrypted_content: string
			id?: string
			summary?: any[]
		}

		const cleanConversationHistory: (Anthropic.Messages.MessageParam | ReasoningItemForRequest)[] = []

		for (const msg of messages) {
			// Standalone reasoning: send encrypted, skip plain text
			if (msg.type === "reasoning") {
				if (msg.encrypted_content) {
					cleanConversationHistory.push({
						type: "reasoning",
						summary: msg.summary,
						encrypted_content: msg.encrypted_content!,
						...(msg.id ? { id: msg.id } : {}),
					})
				}
				continue
			}

			// Preferred path: assistant message with embedded reasoning as first content block
			if (msg.role === "assistant") {
				const rawContent = msg.content

				const contentArray: Anthropic.Messages.ContentBlockParam[] = Array.isArray(rawContent)
					? (rawContent as Anthropic.Messages.ContentBlockParam[])
					: rawContent !== undefined
						? ([
								{ type: "text", text: rawContent } satisfies Anthropic.Messages.TextBlockParam,
							] as Anthropic.Messages.ContentBlockParam[])
						: []

				const [first, ...rest] = contentArray

				// Check if this message has reasoning_details (OpenRouter format for Gemini 3, etc.)
				const msgWithDetails = msg
				if (msgWithDetails.reasoning_details && Array.isArray(msgWithDetails.reasoning_details)) {
					// Build the assistant message with reasoning_details
					let assistantContent: Anthropic.Messages.MessageParam["content"]

					if (contentArray.length === 0) {
						assistantContent = ""
					} else if (contentArray.length === 1 && contentArray[0].type === "text") {
						assistantContent = (contentArray[0] as Anthropic.Messages.TextBlockParam).text
					} else {
						assistantContent = contentArray
					}

					// Create message with reasoning_details property
					cleanConversationHistory.push({