292 lines
10 KiB
JavaScript
292 lines
10 KiB
JavaScript
/**
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* Translator: OpenAI Responses API → OpenAI Chat Completions
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*
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* Responses API uses: { input: [...], instructions: "..." }
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* Chat API uses: { messages: [...] }
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*/
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import { register } from "../index.js";
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import { FORMATS } from "../formats.js";
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import { normalizeResponsesInput } from "../helpers/responsesApiHelper.js";
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// Responses API enforces max 64 chars on call_id (#393)
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const MAX_CALL_ID_LEN = 64;
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const clampCallId = (id) => (typeof id === "string" && id.length > MAX_CALL_ID_LEN ? id.substring(0, MAX_CALL_ID_LEN) : id);
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/**
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* Convert OpenAI Responses API request to OpenAI Chat Completions format
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*/
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export function openaiResponsesToOpenAIRequest(model, body, stream, credentials) {
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if (!body.input) return body;
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const result = { ...body };
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result.messages = [];
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// Convert instructions to system message
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if (body.instructions) {
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result.messages.push({ role: "system", content: body.instructions });
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}
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// Group items by conversation turn
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let currentAssistantMsg = null;
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let pendingToolResults = [];
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const inputItems = normalizeResponsesInput(body.input);
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if (!inputItems) return body;
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for (const item of inputItems) {
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// Determine item type - Droid CLI sends role-based items without 'type' field
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// Fallback: if no type but has role property, treat as message
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const itemType = item.type || (item.role ? "message" : null);
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if (itemType === "message") {
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// Flush any pending assistant message with tool calls
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if (currentAssistantMsg) {
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result.messages.push(currentAssistantMsg);
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currentAssistantMsg = null;
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}
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// Flush pending tool results
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if (pendingToolResults.length > 0) {
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for (const tr of pendingToolResults) {
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result.messages.push(tr);
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}
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pendingToolResults = [];
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}
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// Convert content: input_text → text, output_text → text, input_image → image_url
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const content = Array.isArray(item.content)
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? item.content.map(c => {
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if (c.type === "input_text") return { type: "text", text: c.text };
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if (c.type === "output_text") return { type: "text", text: c.text };
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if (c.type === "input_image") {
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const url = c.image_url || c.file_id || "";
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return { type: "image_url", image_url: { url, detail: c.detail || "auto" } };
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}
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return c;
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})
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: item.content;
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result.messages.push({ role: item.role, content });
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}
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else if (itemType === "function_call") {
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// Start or append to assistant message with tool_calls
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if (!currentAssistantMsg) {
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currentAssistantMsg = {
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role: "assistant",
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content: null,
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tool_calls: []
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};
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}
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// Skip items with empty/missing name — Codex/OpenAI reject nameless tool calls (#444)
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if (!item.name || typeof item.name !== "string" || item.name.trim() === "") continue;
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currentAssistantMsg.tool_calls.push({
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id: item.call_id,
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type: "function",
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function: {
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name: item.name,
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arguments: item.arguments
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}
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});
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}
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else if (itemType === "function_call_output") {
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// Flush assistant message first if exists
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if (currentAssistantMsg) {
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result.messages.push(currentAssistantMsg);
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currentAssistantMsg = null;
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}
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// Flush any pending tool results first
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if (pendingToolResults.length > 0) {
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for (const tr of pendingToolResults) {
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result.messages.push(tr);
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}
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pendingToolResults = [];
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}
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// Add tool result immediately
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result.messages.push({
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role: "tool",
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tool_call_id: item.call_id,
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content: typeof item.output === "string" ? item.output : JSON.stringify(item.output)
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});
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}
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else if (itemType === "reasoning") {
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// Skip reasoning items - they are for display only
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continue;
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}
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}
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// Flush remaining
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if (currentAssistantMsg) {
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result.messages.push(currentAssistantMsg);
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}
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if (pendingToolResults.length > 0) {
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for (const tr of pendingToolResults) {
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result.messages.push(tr);
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}
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}
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// Convert tools format.
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// Responses API supports "hosted" tools (e.g. { type: "request_user_input" }) that carry no
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// explicit `name` field and cannot be represented as Chat Completions function declarations.
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// Filter them out to avoid sending nameless functionDeclarations to downstream providers
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// such as Gemini, which strictly validates function names.
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if (body.tools && Array.isArray(body.tools)) {
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result.tools = body.tools
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.map(tool => {
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// Already in Chat Completions format: { type: "function", function: { name, ... } }
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if (tool.function) return tool;
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// Responses API function tool: { type: "function", name, description, parameters }
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// Only convert when a non-empty name is present; skip hosted tools without one.
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const name = tool.name;
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if (!name || typeof name !== "string" || name.trim() === "") return null;
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return {
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type: "function",
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function: {
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name,
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description: String(tool.description || ""),
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parameters: normalizeToolParameters(tool.parameters),
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strict: tool.strict
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}
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};
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})
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.filter(Boolean);
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}
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// Cleanup Responses API specific fields
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delete result.input;
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delete result.instructions;
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delete result.include;
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delete result.prompt_cache_key;
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delete result.store;
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delete result.reasoning;
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return result;
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}
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/**
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* Ensure object schema always has properties field (required by Codex Responses API)
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*/
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function normalizeToolParameters(params) {
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if (!params) return { type: "object", properties: {} };
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if (params.type === "object" && !params.properties) return { ...params, properties: {} };
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return params;
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}
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/**
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* Convert OpenAI Chat Completions to OpenAI Responses API format
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*/
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export function openaiToOpenAIResponsesRequest(model, body, stream, credentials) {
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// Body already in Responses API format (e.g. Cursor CLI calling /chat/completions with input[])
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if (body.input) return { ...body, model, stream: true };
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const result = {
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model,
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input: [],
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stream: true,
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store: false
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};
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// Extract system message as instructions
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let hasSystemMessage = false;
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const messages = body.messages || [];
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for (const msg of messages) {
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if (msg.role === "system") {
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// Use first system message as instructions
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if (!hasSystemMessage) {
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result.instructions = typeof msg.content === "string" ? msg.content : "";
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hasSystemMessage = true;
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}
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continue; // Skip system messages in input
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}
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// Convert user/assistant messages to input items
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if (msg.role === "user" || msg.role === "assistant") {
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const contentType = msg.role === "user" ? "input_text" : "output_text";
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const content = typeof msg.content === "string"
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? [{ type: contentType, text: msg.content }]
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: Array.isArray(msg.content)
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? msg.content.map(c => {
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if (c.type === "text") return { type: contentType, text: c.text };
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// Convert Chat Completions image_url → Responses API input_image
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// Responses API expects: { type: "input_image", image_url: "<url string>" }
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// Chat Completions sends: { type: "image_url", image_url: { url: "...", detail: "..." } }
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if (c.type === "image_url") {
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const url = typeof c.image_url === "string" ? c.image_url : c.image_url?.url;
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return { type: "input_image", image_url: url, detail: c.image_url?.detail || "auto" };
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}
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if (c.type === "input_image") return c;
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// Serialize any unknown type (tool_use, tool_result, thinking, etc.) as text
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const text = c.text || c.content || JSON.stringify(c);
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return { type: contentType, text: typeof text === "string" ? text : JSON.stringify(text) };
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})
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: [];
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// Only push a message block if content is non-empty.
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// Assistant messages with only tool_calls have content: null — skip the
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// message block in that case; the tool_calls are pushed separately below.
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if (content.length > 0) {
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result.input.push({
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type: "message",
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role: msg.role,
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content
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});
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}
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}
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// Convert tool calls
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if (msg.role === "assistant" && msg.tool_calls) {
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for (const tc of msg.tool_calls) {
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result.input.push({
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type: "function_call",
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call_id: clampCallId(tc.id),
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name: tc.function?.name || "_unknown",
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arguments: tc.function?.arguments || "{}"
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});
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}
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}
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// Convert tool results - output must be a string for Responses API
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if (msg.role === "tool") {
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const output = typeof msg.content === "string"
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? msg.content
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: Array.isArray(msg.content)
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? msg.content.map(c => c.text || JSON.stringify(c)).join("")
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: JSON.stringify(msg.content);
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result.input.push({
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type: "function_call_output",
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call_id: clampCallId(msg.tool_call_id),
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output
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});
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}
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}
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// If no system message, leave instructions empty (will be filled by executor)
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if (!hasSystemMessage) {
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result.instructions = "";
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}
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// Convert tools format
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if (body.tools && Array.isArray(body.tools)) {
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result.tools = body.tools.map(tool => {
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if (tool.type === "function") {
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return {
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type: "function",
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name: tool.function.name,
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description: String(tool.function.description || ""),
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parameters: normalizeToolParameters(tool.function.parameters),
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strict: tool.function.strict
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};
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}
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return tool;
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});
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}
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// Pass through other relevant fields
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if (body.temperature !== undefined) result.temperature = body.temperature;
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if (body.max_tokens !== undefined) result.max_tokens = body.max_tokens;
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if (body.top_p !== undefined) result.top_p = body.top_p;
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return result;
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}
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// Register both directions
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register(FORMATS.OPENAI_RESPONSES, FORMATS.OPENAI, openaiResponsesToOpenAIRequest, null);
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register(FORMATS.OPENAI, FORMATS.OPENAI_RESPONSES, openaiToOpenAIResponsesRequest, null);
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