refactor(open-sse): registry consolidation + DRY media/oauth/adhoc cleanup

- Single-source registry: oauth clientId/tokenUrl, usage URLs, image/embed
  configs, search defaultModel, codex fixedPort, google token url derive.
- Remove 29 unused OmniRoute providers (registry 100→71); media intact.
- De-adhoc: codex literals → registry format/oauth flags; reasoningInject,
  image/embed openrouter headers + xai bodyFields config-driven.
- Add REGISTRY_TEMPLATE.js + expand PROVIDER_DEFAULTS/schema JSDoc.
- Baselines updated; PROVIDERS 62 + alias 90 byte-for-byte, golden snapshots.

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

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

@@ -56,8 +56,10 @@ export function claudeToOpenAIRequest(model, body, stream) {
     }
   }
 
-  // Fix missing tool responses - OpenAI requires every tool_call to have a response
-  fixMissingToolResponses(result.messages);
+  // Fix missing tool responses - OpenAI requires every tool_call to have a response.
+  // Local variant: scans contiguous tool replies + inserts "[No response received]"
+  // (distinct from the global immediate-next check in toolCallHelper, runs on the openai leg).
+  fixMissingToolResponsesOpenAI(result.messages);
 
   // Tools
   if (body.tools && Array.isArray(body.tools)) {
@@ -80,7 +82,7 @@ export function claudeToOpenAIRequest(model, body, stream) {
 }
 
 // Fix missing tool responses - add empty responses for tool_calls without responses
-function fixMissingToolResponses(messages) {
+function fixMissingToolResponsesOpenAI(messages) {
   for (let i = 0; i < messages.length; i++) {
     const msg = messages[i];
     if (msg.role === "assistant" && msg.tool_calls && msg.tool_calls.length > 0) {

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

@@ -3,6 +3,7 @@ import { FORMATS } from "../formats.js";
 import { CLAUDE_SYSTEM_PROMPT } from "../../config/appConstants.js";
 import { adjustMaxTokens } from "../helpers/maxTokensHelper.js";
 import { safeParseJSON } from "../helpers/jsonUtil.js";
+import { parseDataUri } from "../helpers/imageHelper.js";
 
 // Empty prefix matches real Claude Code behavior (no tool name prefix).
 // Previously "proxy_" was used but this is a detectable fingerprint difference.
@@ -235,11 +236,11 @@ function getContentBlocksFromMessage(msg, toolNameMap = new Map()) {
           });
         } else if (part.type === "image_url") {
           const url = part.image_url.url;
-          const match = url.match(/^data:([^;]+);base64,(.+)$/);
-          if (match) {
+          const parsed = parseDataUri(url);
+          if (parsed) {
             blocks.push({
               type: "image",
-              source: { type: "base64", media_type: match[1], data: match[2] }
+              source: { type: "base64", media_type: parsed.mimeType, data: parsed.base64 }
             });
           } else if (url.startsWith("http://") || url.startsWith("https://")) {
             blocks.push({

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

@@ -12,6 +12,7 @@ import {
   KIRO_AGENTIC_SYSTEM_PROMPT,
   resolveDefaultProfileArn
 } from "../../config/kiroConstants.js";
+import { parseDataUri } from "../helpers/imageHelper.js";
 
 /** Render a single tool call as a readable text line. */
 function toolCallToText(name, input) {
@@ -289,11 +290,10 @@ function convertMessages(messages, tools, model) {
           } else if (c.type === "image_url") {
             // OpenAI format: image_url.url with data URI
             const url = c.image_url?.url || "";
-            const base64Match = url.match(/^data:([^;]+);base64,(.+)$/);
-            if (base64Match) {
-              const mediaType = base64Match[1];
-              const format = mediaType.split("/")[1] || mediaType;
-              pendingImages.push({ format, source: { bytes: base64Match[2] } });
+            const parsed = parseDataUri(url);
+            if (parsed) {
+              const format = parsed.mimeType.split("/")[1] || parsed.mimeType;
+              pendingImages.push({ format, source: { bytes: parsed.base64 } });
             } else if (url.startsWith("http://") || url.startsWith("https://")) {
               // Kiro only supports base64 — fallback to URL text
               textParts.push(`[Image: ${url}]`);

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

@@ -1,5 +1,6 @@
 import { register } from "../index.js";
 import { FORMATS } from "../formats.js";
+import { parseDataUri } from "../helpers/imageHelper.js";
 
 /**
  * Convert OpenAI request to Ollama format
@@ -179,10 +180,10 @@ function extractImagesFromContent(content) {
     const url = typeof block.image_url === "string" ? block.image_url : block.image_url?.url;
     if (typeof url !== "string" || !url) continue;
 
-    const m = url.match(/^data:[^;]+;base64,([\s\S]+)$/);
-    if (!m) continue;
+    const parsed = parseDataUri(url);
+    if (!parsed) continue;
 
-    images.push(m[1]);
+    images.push(parsed.base64);
   }
 
   return images;