downgradeOpenAIReasoningBlocks,

normalizeOpenAIResponsesToolCallIds,

} from "./embedded-agent-helpers/openai.js";

export {

isEmptyAssistantMessageContent,

sanitizeSessionMessagesImages,

} from "./embedded-agent-helpers/images.js";

export { sanitizeSessionMessagesImages } from "./embedded-agent-helpers/images.js";

export {

isMessagingToolDuplicate,

isMessagingToolDuplicateNormalized,

return [{ type: "text", text: EMPTY_CONTENT_PLACEHOLDER }] as T[];

}

/** Return true when an assistant turn contains no usable content blocks. */

export function isEmptyAssistantMessageContent(

message: Extract<AgentMessage, { role: "assistant" }>,

): boolean {

const content = message.content;

if (content == null) {

return true;

}

if (!Array.isArray(content)) {

return false;

}

return content.every((block) => {

if (!block || typeof block !== "object") {

return true;

}

const rec = block as { type?: unknown; text?: unknown };

if (rec.type !== "text") {

return false;

}

return typeof rec.text !== "string" || rec.text.trim().length === 0;

});

}

/** Resize/remove unsafe image payloads while keeping transcript turns valid. */

export async function sanitizeSessionMessagesImages(

messages: AgentMessage[],