Ignore streaming AI SDK tool availability

Author: Alex-yang00

src/api/transform/__tests__/ai-sdk.spec.ts

@@ -536,6 +536,43 @@ describe("AI SDK conversion utilities", () => {
 			expect(seenStreamingToolCallIds.has("call_1")).toBe(false)
 		})
 
+		it("ignores tool-input-available for calls that are still streaming input", () => {
+			const seenStreamingToolCallIds = new Set<string>()
+			const chunks = [
+				...processAiSdkStreamPart(
+					{ type: "tool-input-start" as const, id: "call_1", toolName: "attempt_completion" },
+					seenStreamingToolCallIds,
+				),
+				...processAiSdkStreamPart(
+					{
+						type: "tool-input-available" as const,
+						toolCallId: "call_1",
+						toolName: "attempt_completion",
+						input: {},
+					},
+					seenStreamingToolCallIds,
+				),
+				...processAiSdkStreamPart(
+					{
+						type: "tool-call" as const,
+						toolCallId: "call_1",
+						toolName: "attempt_completion",
+						input: { result: "done" },
+					},
+					seenStreamingToolCallIds,
+				),
+			]
+
+			expect(chunks).toEqual([
+				{
+					type: "tool_call",
+					id: "call_1",
+					name: "attempt_completion",
+					arguments: '{"result":"done"}',
+				},
+			])
+		})
+
 		it("processes source chunks with URL", () => {
 			const part = {
 				type: "source" as const,

src/api/transform/ai-sdk.ts

@@ -249,6 +249,10 @@ export function* processAiSdkStreamPart(
 			break
 
 		case "tool-input-available":
+			if (seenStreamingToolCallIds?.has(getToolCallId(part))) {
+				break
+			}
+
 			yield {
 				type: "tool_call",
 				id: getToolCallId(part),