fix(translator): ESM-safe registry + tool-id pairing + responses max_tokens; add real-creds tests

- translator/index.js: replace require() with static side-effect imports (ESM-safe),
  lazy-init registry maps to survive circular import order
- openai-responses->openai: map max_output_tokens -> max_tokens (avoid leaking field upstream)
- gemini/antigravity -> openai: derive deterministic tool_call id from name so
  functionCall/functionResponse pair correctly (fixes provider tool-pairing 400s)
- add offline unit tests (finish-reason, usage, session-manager, ollama malformed args, const guard)
- add real-creds integration tests (provider-cases + all-formats matrix: 6 inbound formats x 4 scenarios)

Includes co-located provider registry refactor (pricing/capabilities/media providers) and sessionManager updates.

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

open-sse/translator/request/antigravity-to-openai.js

@@ -160,7 +160,8 @@ function convertContent(content) {
     // Function call
     if (part.functionCall) {
       toolCalls.push({
-        id: part.functionCall.id || `call_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`,
+        // Deterministic id from name so the matching functionResponse pairs correctly.
+        id: part.functionCall.id || `call_${part.functionCall.name}`,
         type: OPENAI_BLOCK.FUNCTION,
         function: {
           name: part.functionCall.name,
@@ -173,7 +174,7 @@ function convertContent(content) {
     if (part.functionResponse) {
       toolResults.push({
         role: ROLE.TOOL,
-        tool_call_id: part.functionResponse.id || part.functionResponse.name,
+        tool_call_id: part.functionResponse.id || `call_${part.functionResponse.name}`,
         content: JSON.stringify(part.functionResponse.response?.result || part.functionResponse.response || {})
       });
     }

open-sse/translator/request/gemini-to-openai.js

@@ -97,8 +97,10 @@ function convertGeminiContent(content) {
     }
 
     if (part.functionCall) {
+      // Gemini lacks a native call id; derive a deterministic one from the name so the
+      // matching functionResponse maps to the same tool_call_id (providers require pairing).
       toolCalls.push({
-        id: `call_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`,
+        id: part.functionCall.id || `call_${part.functionCall.name}`,
         type: OPENAI_BLOCK.FUNCTION,
         function: {
           name: part.functionCall.name,
@@ -110,7 +112,7 @@ function convertGeminiContent(content) {
     if (part.functionResponse) {
       return {
         role: ROLE.TOOL,
-        tool_call_id: part.functionResponse.id || part.functionResponse.name,
+        tool_call_id: part.functionResponse.id || `call_${part.functionResponse.name}`,
         content: JSON.stringify(part.functionResponse.response?.result || part.functionResponse.response || {})
       };
     }

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

@@ -177,6 +177,12 @@ export function openaiResponsesToOpenAIRequest(model, body, stream, credentials)
   }
 
   // Cleanup Responses API specific fields
+  // Map Responses-only max_output_tokens to Chat max_tokens (avoid leaking unknown field upstream)
+  if (result.max_output_tokens !== undefined) {
+    if (result.max_tokens === undefined) result.max_tokens = result.max_output_tokens;
+    delete result.max_output_tokens;
+  }
+
   delete result.input;
   delete result.instructions;
   delete result.include;

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

@@ -5,6 +5,7 @@
 import { register } from "../index.js";
 import { FORMATS } from "../formats.js";
 import { v4 as uuidv4 } from "uuid";
+import { resolveSessionId } from "../../utils/sessionManager.js";
 import {
   resolveKiroModel,
   isThinkingEnabled,
@@ -546,7 +547,7 @@ export function openaiToKiroRequest(model, body, stream, credentials) {
   const payload = {
     conversationState: {
       chatTriggerType: "MANUAL",
-      conversationId: uuidv4(),
+      conversationId: resolveSessionId({ headers: credentials?.rawHeaders, body, connectionId: credentials?.connectionId, scope: "kiro" }),
       currentMessage: {
         userInputMessage: {
           content: finalContent,