chore: import upstream snapshot with attribution

tests/unit/custom-model-target-format.test.ts

@@ -0,0 +1,83 @@
+/**
+ * Issue #2905 — custom models (added via the UI) on opencode-go / openai-compatible
+ * nodes always routed as OpenAI-compatible because there was no way to set a
+ * per-model `targetFormat`. `addCustomModel` didn't accept it, the API schema
+ * stripped it, and routing (`getModelTargetFormat`, static-registry-only) never
+ * saw it — so a custom model that needs the Anthropic Messages shape fell back
+ * to the provider default ("openai").
+ *
+ * This test verifies the persistence + getModelInfo-injection chain: a custom
+ * model saved with targetFormat: "claude" is surfaced on the resolved modelInfo
+ * (which chatCore then uses before the provider default).
+ */
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+
+const TEST_DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), "omniroute-custom-target-format-"));
+process.env.DATA_DIR = TEST_DATA_DIR;
+
+const core = await import("../../src/lib/db/core.ts");
+const providersDb = await import("../../src/lib/db/providers.ts");
+const modelsDb = await import("../../src/lib/db/models.ts");
+const { getModelInfo } = await import("../../src/sse/services/model.ts");
+
+test.before(async () => {
+  await providersDb.createProviderNode({
+    id: "openai-compatible-2905",
+    type: "openai-compatible",
+    name: "Gateway 2905",
+    prefix: "g29",
+    baseUrl: "https://proxy.example.com",
+    chatPath: "/v1/chat/completions",
+    modelsPath: "/v1/models",
+  });
+});
+
+test.after(() => {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+});
+
+test("#2905 addCustomModel persists targetFormat", async () => {
+  await modelsDb.addCustomModel(
+    "openai-compatible-2905",
+    "my-claude-model",
+    "My Claude Model",
+    "manual",
+    "chat-completions",
+    ["chat"],
+    "claude"
+  );
+  const models = (await modelsDb.getCustomModels("openai-compatible-2905")) as Array<{
+    id: string;
+    targetFormat?: string;
+  }>;
+  const saved = models.find((m) => m.id === "my-claude-model");
+  assert.ok(saved, "custom model must be saved");
+  assert.equal(saved.targetFormat, "claude", "targetFormat must be persisted");
+});
+
+test("#2905 getModelInfo surfaces the custom model targetFormat", async () => {
+  const info = (await getModelInfo("g29/my-claude-model")) as {
+    provider?: string;
+    targetFormat?: string;
+  };
+  assert.equal(info.provider, "openai-compatible-2905", "must resolve to the custom node");
+  assert.equal(info.targetFormat, "claude", "getModelInfo must inject the custom targetFormat");
+});
+
+test("#2905 a custom model without targetFormat surfaces none (provider default applies)", async () => {
+  await modelsDb.addCustomModel(
+    "openai-compatible-2905",
+    "plain-model",
+    "Plain Model",
+    "manual",
+    "chat-completions",
+    ["chat"]
+  );
+  const info = (await getModelInfo("g29/plain-model")) as { targetFormat?: string };
+  assert.equal(info.targetFormat, undefined, "no targetFormat → falls back to provider default");
+});