refactor(open-sse): dedup fallback tool_call id helper (B3)

Add fallbackToolCallId() and apply to kiro/ollama/openai-responses response
translators (identical id shape). Leave commandcode (different order) and
request-side gemini/antigravity (random suffix) untouched. Golden + gate clean.

Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/translator/helpers/toolCallHelper.js

@@ -3,6 +3,11 @@
 // Anthropic tool_use.id must match: ^[a-zA-Z0-9_-]+$
 const TOOL_ID_PATTERN = /^[a-zA-Z0-9_-]+$/;
 
+// Fallback streaming tool_call id when provider omits one (index optional)
+export function fallbackToolCallId(index) {
+  return index === undefined ? `call_${Date.now()}` : `call_${index}_${Date.now()}`;
+}
+
 // Generate deterministic tool call ID from position + tool name (cache-friendly)
 export function generateToolCallId(msgIndex = 0, tcIndex = 0, toolName = "") {
   const name = toolName ? `_${toolName.replace(/[^a-zA-Z0-9_-]/g, "")}` : "";

open-sse/translator/response/kiro-to-openai.js

@@ -5,6 +5,7 @@
 import { register } from "../index.js";
 import { FORMATS } from "../formats.js";
 import { buildChunk } from "../helpers/chunkBuilder.js";
+import { fallbackToolCallId } from "../helpers/toolCallHelper.js";
 
 // Build chunk meta for current kiro state
 function chunkMeta(state) {
@@ -105,7 +106,7 @@ export function convertKiroToOpenAI(chunk, state) {
   // Handle tool use events
   if (eventType === "toolUseEvent" || data.toolUseEvent) {
     const toolUse = data.toolUseEvent || data;
-    const toolCallId = toolUse.toolUseId || `call_${Date.now()}`;
+    const toolCallId = toolUse.toolUseId || fallbackToolCallId();
     const toolName = toolUse.name || "";
     const toolInput = toolUse.input || {};
 

open-sse/translator/response/ollama-to-openai.js

@@ -1,6 +1,7 @@
 import { register } from "../index.js";
 import { FORMATS } from "../formats.js";
 import { buildChunk } from "../helpers/chunkBuilder.js";
+import { fallbackToolCallId } from "../helpers/toolCallHelper.js";
 
 /**
  * Convert Ollama NDJSON response to OpenAI SSE format
@@ -91,7 +92,7 @@ function extractUsage(ollamaChunk) {
 function convertToolCalls(toolCalls) {
   return toolCalls.map((tc, i) => ({
     index: tc.function?.index ?? i,
-    id: tc.id || `call_${i}_${Date.now()}`,
+    id: tc.id || fallbackToolCallId(i),
     type: "function",
     function: {
       name: tc.function?.name || "",

open-sse/translator/response/openai-responses.js

@@ -6,6 +6,7 @@ import { register } from "../index.js";
 import { FORMATS } from "../formats.js";
 import { buildChunk } from "../helpers/chunkBuilder.js";
 import { buildUsage } from "../helpers/usageHelper.js";
+import { fallbackToolCallId } from "../helpers/toolCallHelper.js";
 
 /**
  * Translate OpenAI chunk to Responses API events
@@ -424,7 +425,7 @@ export function openaiResponsesToOpenAIResponse(chunk, state) {
   // Function call started (standard function_call or custom_tool_call)
   if (eventType === "response.output_item.added" && (data.item?.type === "function_call" || data.item?.type === "custom_tool_call")) {
     const item = data.item;
-    state.currentToolCallId = item.call_id || `call_${Date.now()}`;
+    state.currentToolCallId = item.call_id || fallbackToolCallId();
 
     return buildChunk(
       { id: state.chatId, created: state.created, model: state.model || "unknown" },