Method addCacheControl

src/api/providers/minimax.ts:242–270

* Add cache control to the last two user messages for prompt caching

(
		messages: Anthropic.Messages.MessageParam[],
		cacheControl: CacheControlEphemeral,
	)

	 * Add cache control to the last two user messages for prompt caching
	 */
	private addCacheControl(
		messages: Anthropic.Messages.MessageParam[],
		cacheControl: CacheControlEphemeral,
	): Anthropic.Messages.MessageParam[] {
		const userMsgIndices = messages.reduce(
			(acc, msg, index) => (msg.role === "user" ? [...acc, index] : acc),
			[] as number[],
		)

		const lastUserMsgIndex = userMsgIndices[userMsgIndices.length - 1] ?? -1
		const secondLastMsgUserIndex = userMsgIndices[userMsgIndices.length - 2] ?? -1

		return messages.map((message, index) => {
			if (index === lastUserMsgIndex || index === secondLastMsgUserIndex) {
				return {
					...message,
					content:
						typeof message.content === "string"
							? [{ type: "text", text: message.content, cache_control: cacheControl }]
							: message.content.map((content, contentIndex) =>
									contentIndex === message.content.length - 1
										? { ...content, cache_control: cacheControl }
										: content,
								),
				}
			}
			return message
		})
	}

	getModel() {
		const modelId = this.options.apiModelId