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/index.js

@@ -5,6 +5,7 @@ import { cloakClaudeTools } from "../utils/claudeCloaking.js";
 import { filterToOpenAIFormat } from "./helpers/openaiHelper.js";
 import { normalizeThinkingConfig } from "../services/provider.js";
 import { AntigravityExecutor } from "../executors/antigravity.js";
+import { PROVIDERS } from "../providers/index.js";
 
 // Registry for translators
 const requestRegistry = new Map();
@@ -122,8 +123,8 @@ export function translateRequest(sourceFormat, targetFormat, model, body, stream
   }
 
   // Claude cloaking: rename client tools with _cc suffix (anti-ban)
-  // Only for claude provider (not anthropic-compatible-*) with OAuth token
-  if (provider === "claude") {
+  // quirk: only providers flagged cloakToolsOnOAuth, and only with an OAuth token
+  if (PROVIDERS[provider]?.quirks?.cloakToolsOnOAuth) {
     const apiKey = credentials?.accessToken || credentials?.apiKey || null;
     if (apiKey?.includes("sk-ant-oat")) {
       const { body: cloakedBody, toolNameMap } = cloakClaudeTools(result);