test(translator): add data-driven coverage, bug-exposing cases, and real provider smoke

- matrix.js generates N providers x M models from PROVIDER_MODELS
- coverage-all-models + format-roundtrip for structural/semantic checks
- bugs-* files expose known translation issues via it.fails
- real/smoke-providers runs full handleChatCore path against live providers (RUN_REAL=1), concurrent
- registerAll.js eagerly imports translators (Vitest ESM require fix)
- vitest.config: array aliases for subpaths + maxConcurrency 60

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

tests/translator/bugs-kiro.test.js

@@ -0,0 +1,45 @@
+// OpenAI → Kiro (AWS CodeWhisperer) request translation.
+import { describe, it, expect } from "vitest";
+import "./registerAll.js";
+import { translateRequest } from "../../open-sse/translator/index.js";
+import { FORMATS } from "../../open-sse/translator/formats.js";
+
+const O2K = (body) => translateRequest(FORMATS.OPENAI, FORMATS.KIRO, "m", body, true, null, "kiro");
+
+describe("OpenAI → Kiro", () => {
+  // openai-to-kiro.js:214-216 — JSON.parse(arguments) without try/catch → throws on bad JSON
+  // KNOWN BUG (severe: throws and breaks the whole request)
+  it.fails("malformed tool arguments do not throw the whole request", () => {
+    expect(() =>
+      O2K({
+        messages: [
+          { role: "user", content: "go" },
+          { role: "assistant", content: "", tool_calls: [
+            { id: "c1", type: "function", function: { name: "f", arguments: "{not json" } },
+          ] },
+          { role: "tool", tool_call_id: "c1", content: "r" },
+        ],
+      })
+    ).not.toThrow();
+  });
+
+  // openai-to-kiro.js:309 — maxTokens hardcoded to 32000, ignores body.max_tokens
+  // KNOWN BUG
+  it.fails("respects client max_tokens", () => {
+    const out = O2K({ max_tokens: 100, messages: [{ role: "user", content: "hi" }] });
+    expect(out.inferenceConfig?.maxTokens, "client max_tokens ignored").toBe(100);
+  });
+
+  // openai-to-kiro.js:132-134 — remote http image becomes "[Image: url]" text (lost)
+  // KNOWN BUG
+  it.fails("remote image url is preserved as an image, not text", () => {
+    const out = O2K({
+      messages: [{ role: "user", content: [
+        { type: "text", text: "see" },
+        { type: "image_url", image_url: { url: "https://x.com/p.png" } },
+      ] }],
+    });
+    const content = out.conversationState?.currentMessage?.userInputMessage?.content || "";
+    expect(content, "remote image flattened to text").not.toContain("[Image:");
+  });
+});