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{"version":3,"file":"tanstack.cjs","names":["EventType"],"sources":["../../../src/agent/converters/tanstack.ts"],"sourcesContent":["import {\n BaseEvent,\n EventType,\n RunAgentInput,\n Message,\n TextMessageChunkEvent,\n ToolCallArgsEvent,\n ToolCallEndEvent,\n ToolCallStartEvent,\n ToolCallResultEvent,\n StateSnapshotEvent,\n StateDeltaEvent,\n ReasoningStartEvent,\n ReasoningMessageStartEvent,\n ReasoningMessageContentEvent,\n ReasoningMessageEndEvent,\n ReasoningEndEvent,\n} from \"@ag-ui/client\";\nimport { randomUUID } from \"@copilotkit/shared\";\n\ntype ContentPartSource =\n | { type: \"data\"; value: string; mimeType: string }\n | { type: \"url\"; value: string; mimeType?: string };\n\n/**\n * A TanStack AI content part (text, image, audio, video, or document).\n */\nexport type TanStackContentPart =\n | { type: \"text\"; content: string }\n | { type: \"image\"; source: ContentPartSource }\n | { type: \"audio\"; source: ContentPartSource }\n | { type: \"video\"; source: ContentPartSource }\n | { type: \"document\"; source: ContentPartSource };\n\n/**\n * Message format expected by TanStack AI's `chat()`.\n *\n * Content is typed as `any[]` for the multimodal case so messages are directly\n * passable to any adapter without casts — different adapters constrain which\n * modalities they accept (e.g. OpenAI only allows text + image).\n * Use `TanStackContentPart` to inspect individual parts if needed.\n */\nexport interface TanStackChatMessage {\n role: \"user\" | \"assistant\" | \"tool\";\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n content: string | null | any[];\n name?: string;\n toolCalls?: Array<{\n id: string;\n type: \"function\";\n function: { name: string; arguments: string };\n }>;\n toolCallId?: string;\n}\n\n/**\n * Result of converting RunAgentInput to TanStack AI format.\n */\nexport interface TanStackInputResult {\n /** Chat messages (only user/assistant/tool roles; all others excluded) */\n messages: TanStackChatMessage[];\n /** System prompts extracted from system/developer messages, context, and state */\n systemPrompts: string[];\n}\n\n/**\n * Converts AG-UI user message content to TanStack AI format.\n * Handles plain strings, multimodal parts (image/audio/video/document),\n * and legacy BinaryInputContent for backward compatibility.\n */\nfunction convertUserContent(\n content: unknown,\n): string | null | TanStackContentPart[] {\n if (!content) return null;\n if (typeof content === \"string\") return content;\n if (!Array.isArray(content)) return null;\n if (content.length === 0) return \"\";\n\n const parts: TanStackContentPart[] = [];\n\n for (const part of content) {\n if (!part || typeof part !== \"object\" || !(\"type\" in part)) continue;\n\n switch ((part as { type: string }).type) {\n case \"text\": {\n const text = (part as { text?: string }).text;\n if (text != null) parts.push({ type: \"text\", content: text });\n break;\n }\n\n case \"image\":\n case \"audio\":\n case \"video\":\n case \"document\": {\n const source = (part as { source?: any }).source;\n if (!source) break;\n const partType = (part as { type: string }).type as\n | \"image\"\n | \"audio\"\n | \"video\"\n | \"document\";\n if (source.type === \"data\") {\n parts.push({\n type: partType,\n source: {\n type: \"data\",\n value: source.value,\n mimeType: source.mimeType,\n },\n });\n } else if (source.type === \"url\") {\n parts.push({\n type: partType,\n source: {\n type: \"url\",\n value: source.value,\n ...(source.mimeType ? { mimeType: source.mimeType } : {}),\n },\n });\n }\n break;\n }\n\n // Legacy BinaryInputContent backward compatibility\n case \"binary\": {\n const legacy = part as {\n mimeType?: string;\n data?: string;\n url?: string;\n };\n const mimeType = legacy.mimeType ?? \"application/octet-stream\";\n const isImage = mimeType.startsWith(\"image/\");\n\n if (legacy.data) {\n const partType = isImage ? \"image\" : \"document\";\n parts.push({\n type: partType,\n source: { type: \"data\", value: legacy.data, mimeType },\n });\n } else if (legacy.url) {\n const partType = isImage ? \"image\" : \"document\";\n parts.push({\n type: partType,\n source: { type: \"url\", value: legacy.url, mimeType },\n });\n }\n break;\n }\n }\n }\n\n return parts.length > 0 ? parts : \"\";\n}\n\n/**\n * Converts a RunAgentInput into the format expected by TanStack AI's `chat()`.\n *\n * - Keeps only user/assistant/tool messages (activity, reasoning, and other roles are also excluded)\n * - Extracts system/developer messages into `systemPrompts`\n * - Appends context entries and application state to `systemPrompts`\n * - Preserves tool calls on assistant messages and toolCallId on tool messages\n */\nexport function convertInputToTanStackAI(\n input: RunAgentInput,\n): TanStackInputResult {\n // Allowlist: only pass user/assistant/tool messages to TanStack.\n // Other roles (system, developer, activity, reasoning) are either\n // extracted into systemPrompts or not applicable.\n const chatRoles = new Set([\"user\", \"assistant\", \"tool\"]);\n const messages: TanStackChatMessage[] = input.messages\n .filter((m: Message) => chatRoles.has(m.role))\n .map((m: Message): TanStackChatMessage => {\n const msg: TanStackChatMessage = {\n role: m.role as \"user\" | \"assistant\" | \"tool\",\n content:\n m.role === \"user\"\n ? convertUserContent(m.content)\n : typeof m.content === \"string\"\n ? m.content\n : null,\n };\n if (m.role === \"assistant\" && \"toolCalls\" in m && m.toolCalls) {\n msg.toolCalls = m.toolCalls.map((tc) => ({\n id: tc.id,\n type: \"function\" as const,\n function: {\n name: tc.function.name,\n arguments: tc.function.arguments,\n },\n }));\n }\n if (m.role === \"tool\" && \"toolCallId\" in m) {\n msg.toolCallId = (m as Record<string, unknown>).toolCallId as string;\n }\n return msg;\n });\n\n const systemPrompts: string[] = [];\n for (const m of input.messages) {\n if ((m.role === \"system\" || m.role === \"developer\") && m.content) {\n systemPrompts.push(\n typeof m.content === \"string\" ? m.content : JSON.stringify(m.content),\n );\n }\n }\n\n if (input.context?.length) {\n for (const ctx of input.context) {\n systemPrompts.push(`${ctx.description}:\\n${ctx.value}`);\n }\n }\n\n if (\n input.state !== undefined &&\n input.state !== null &&\n typeof input.state === \"object\" &&\n Object.keys(input.state).length > 0\n ) {\n systemPrompts.push(\n `Application State:\\n\\`\\`\\`json\\n${JSON.stringify(input.state, null, 2)}\\n\\`\\`\\``,\n );\n }\n\n return { messages, systemPrompts };\n}\n\n/**\n * Converts a TanStack AI stream into AG-UI `BaseEvent` objects.\n *\n * This is a pure converter — it does NOT emit lifecycle events\n * (RUN_STARTED / RUN_FINISHED / RUN_ERROR). The caller (Agent class)\n * is responsible for those.\n */\nexport async function* convertTanStackStream(\n stream: AsyncIterable<unknown>,\n abortSignal: AbortSignal,\n): AsyncGenerator<BaseEvent> {\n const messageId = randomUUID();\n const toolNamesById = new Map<string, string>();\n // Track the reasoning lifecycle at two granularities so closeReasoningIfOpen\n // emits exactly the events still owed. A single boolean conflates the run\n // (REASONING_START → REASONING_END) with the message\n // (REASONING_MESSAGE_START → REASONING_MESSAGE_END) and produces a duplicate\n // REASONING_MESSAGE_END when upstream emits MSG_END but not END before\n // text/tools resume.\n let reasoningRunOpen = false;\n let reasoningMessageOpen = false;\n let reasoningMessageId = randomUUID();\n\n function* closeReasoningIfOpen(): Generator<BaseEvent> {\n if (reasoningMessageOpen) {\n reasoningMessageOpen = false;\n const msgEnd: ReasoningMessageEndEvent = {\n type: EventType.REASONING_MESSAGE_END,\n messageId: reasoningMessageId,\n };\n yield msgEnd;\n }\n if (reasoningRunOpen) {\n reasoningRunOpen = false;\n const end: ReasoningEndEvent = {\n type: EventType.REASONING_END,\n messageId: reasoningMessageId,\n };\n yield end;\n }\n }\n\n // TanStack's chat() engine runs a multi-turn agent loop: after the model\n // returns tool calls, the engine tries to execute them and re-prompt. This\n // produces a second round of TOOL_CALL_START / TOOL_CALL_END events that\n // duplicate the ones from the first streaming pass. The CopilotKit runtime\n // handles tool execution externally (via the frontend SDK), so we must stop\n // converting events once the TanStack adapter signals the first turn is\n // complete with RUN_FINISHED.\n let runFinished = false;\n\n for await (const chunk of stream) {\n if (abortSignal.aborted) break;\n\n const raw = chunk as Record<string, unknown>;\n const type = raw.type as string;\n\n // Stop converting after the first RUN_FINISHED — any subsequent events\n // come from TanStack's internal tool-execution loop and would produce\n // duplicate TOOL_CALL_END events that violate the ag-ui verify middleware.\n if (type === \"RUN_FINISHED\") {\n runFinished = true;\n continue;\n }\n if (runFinished) continue;\n\n if (type === \"TEXT_MESSAGE_CONTENT\" && raw.delta != null) {\n yield* closeReasoningIfOpen();\n const textEvent: TextMessageChunkEvent = {\n type: EventType.TEXT_MESSAGE_CHUNK,\n role: \"assistant\",\n messageId,\n delta: raw.delta as string,\n };\n yield textEvent;\n } else if (type === \"TOOL_CALL_START\") {\n yield* closeReasoningIfOpen();\n toolNamesById.set(raw.toolCallId as string, raw.toolCallName as string);\n const startEvent: ToolCallStartEvent = {\n type: EventType.TOOL_CALL_START,\n parentMessageId: messageId,\n toolCallId: raw.toolCallId as string,\n toolCallName: raw.toolCallName as string,\n };\n yield startEvent;\n } else if (type === \"TOOL_CALL_ARGS\") {\n yield* closeReasoningIfOpen();\n const argsEvent: ToolCallArgsEvent = {\n type: EventType.TOOL_CALL_ARGS,\n toolCallId: raw.toolCallId as string,\n delta: raw.delta as string,\n };\n yield argsEvent;\n } else if (type === \"TOOL_CALL_END\") {\n yield* closeReasoningIfOpen();\n const endEvent: ToolCallEndEvent = {\n type: EventType.TOOL_CALL_END,\n toolCallId: raw.toolCallId as string,\n };\n yield endEvent;\n } else if (type === \"TOOL_CALL_RESULT\") {\n yield* closeReasoningIfOpen();\n const toolCallId = raw.toolCallId as string;\n const toolName = toolNamesById.get(toolCallId);\n // Accept the payload from either `content` (canonical TanStack shape)\n // or `result` (alternate shape used by some adapters / tests). Both\n // state-tool detection and the final TOOL_CALL_RESULT serialization\n // must read the same field, otherwise STATE_SNAPSHOT/STATE_DELTA can\n // be silently dropped when upstream uses `result`.\n const rawPayload = raw.content ?? raw.result;\n\n const parsedContent =\n typeof rawPayload === \"string\" ? safeParse(rawPayload) : rawPayload;\n\n if (\n toolName === \"AGUISendStateSnapshot\" &&\n parsedContent &&\n typeof parsedContent === \"object\" &&\n \"snapshot\" in parsedContent\n ) {\n const stateSnapshotEvent: StateSnapshotEvent = {\n type: EventType.STATE_SNAPSHOT,\n snapshot: (parsedContent as Record<string, unknown>).snapshot,\n };\n yield stateSnapshotEvent;\n }\n\n if (\n toolName === \"AGUISendStateDelta\" &&\n parsedContent &&\n typeof parsedContent === \"object\" &&\n \"delta\" in parsedContent\n ) {\n const stateDeltaEvent: StateDeltaEvent = {\n type: EventType.STATE_DELTA,\n delta: (parsedContent as Record<string, unknown>).delta as never,\n };\n yield stateDeltaEvent;\n }\n\n let serializedContent: string;\n if (typeof rawPayload === \"string\") {\n serializedContent = rawPayload;\n } else {\n try {\n serializedContent = JSON.stringify(rawPayload ?? null);\n } catch {\n serializedContent = \"[Unserializable tool result]\";\n }\n }\n\n const resultEvent: ToolCallResultEvent = {\n type: EventType.TOOL_CALL_RESULT,\n role: \"tool\",\n messageId: randomUUID(),\n toolCallId,\n content: serializedContent,\n };\n yield resultEvent;\n toolNamesById.delete(toolCallId);\n } else if (type === \"REASONING_START\") {\n // If a prior reasoning run is still open (no REASONING_END before this\n // new START), close it cleanly first so MSG_END / END pair correctly.\n yield* closeReasoningIfOpen();\n reasoningRunOpen = true;\n reasoningMessageId = (raw.messageId as string) ?? randomUUID();\n const startEvt: ReasoningStartEvent = {\n type: EventType.REASONING_START,\n messageId: reasoningMessageId,\n };\n yield startEvt;\n } else if (type === \"REASONING_MESSAGE_START\") {\n reasoningMessageOpen = true;\n const evt: ReasoningMessageStartEvent = {\n type: EventType.REASONING_MESSAGE_START,\n messageId: reasoningMessageId,\n role: \"reasoning\",\n };\n yield evt;\n } else if (type === \"REASONING_MESSAGE_CONTENT\") {\n const evt: ReasoningMessageContentEvent = {\n type: EventType.REASONING_MESSAGE_CONTENT,\n messageId: reasoningMessageId,\n delta: raw.delta as string,\n };\n yield evt;\n } else if (type === \"REASONING_MESSAGE_END\") {\n reasoningMessageOpen = false;\n const evt: ReasoningMessageEndEvent = {\n type: EventType.REASONING_MESSAGE_END,\n messageId: reasoningMessageId,\n };\n yield evt;\n } else if (type === \"REASONING_END\") {\n // If upstream sends REASONING_END while a message is still open, emit\n // the missing REASONING_MESSAGE_END FIRST so the closing pair stays in\n // order (MSG_END before END). 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