chore: import upstream snapshot with attribution

tests/unit/vscode-shared-metadata.test.ts

@@ -0,0 +1,63 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+const familyFirstModelIds =
+  await import("../../src/app/api/v1/vscode/[token]/familyFirstModelIds.ts");
+const rawFamilyFirstModelIds =
+  await import("../../src/app/api/v1/vscode/raw/[token]/familyFirstModelIds.ts");
+const serviceTierVariants =
+  await import("../../src/app/api/v1/vscode/[token]/serviceTierVariants.ts");
+const rawServiceTierVariants =
+  await import("../../src/app/api/v1/vscode/raw/[token]/serviceTierVariants.ts");
+const reasoningMetadata = await import("../../src/app/api/v1/vscode/[token]/reasoningMetadata.ts");
+const rawReasoningMetadata =
+  await import("../../src/app/api/v1/vscode/raw/[token]/reasoningMetadata.ts");
+
+test("vscode raw and tokenized family-first helpers share behavior", () => {
+  assert.equal(
+    familyFirstModelIds.resolveFamilyFirstPublishedModelId("gpt-5.4__provider_cx__tier_priority"),
+    "cx/gpt-5.4__tier_priority"
+  );
+  assert.deepEqual(
+    rawFamilyFirstModelIds.getFamilyFirstModelCandidates("cx/gpt-5.4__tier_flex", "gpt-5.4"),
+    familyFirstModelIds.getFamilyFirstModelCandidates("cx/gpt-5.4__tier_flex", "gpt-5.4")
+  );
+});
+
+test("vscode raw and tokenized service tier helpers share behavior", () => {
+  const tokenizedPayload = serviceTierVariants.resolveVscodeServiceTierRequest({
+    model: "gpt-5.4__provider_cx__tier_flex",
+  });
+  const rawPayload = rawServiceTierVariants.resolveVscodeServiceTierRequest({
+    model: "gpt-5.4__provider_cx__tier_flex",
+  });
+
+  assert.deepEqual(rawPayload, tokenizedPayload);
+  assert.deepEqual(
+    serviceTierVariants.expandVscodeServiceTierModels([
+      { id: "cx/gpt-5.4", name: "cx/gpt-5.4", owned_by: "codex" },
+    ]),
+    rawServiceTierVariants.expandVscodeServiceTierModels([
+      { id: "cx/gpt-5.4", name: "cx/gpt-5.4", owned_by: "codex" },
+    ])
+  );
+});
+
+test("vscode raw and tokenized reasoning helpers share behavior", () => {
+  const reasoningModel = {
+    id: "openai/gpt-5-high",
+    owned_by: "openai",
+    capabilities: { reasoning: true },
+  };
+  const supportedValues = reasoningMetadata.getReasoningEffortValues(reasoningModel);
+
+  assert.deepEqual(supportedValues, rawReasoningMetadata.getReasoningEffortValues(reasoningModel));
+  assert.equal(
+    reasoningMetadata.inferSelectedReasoningEffort(reasoningModel, supportedValues),
+    "high"
+  );
+  assert.deepEqual(
+    reasoningMetadata.buildReasoningConfigSchema(["none", "high"], "high"),
+    rawReasoningMetadata.buildReasoningConfigSchema(["none", "high"], "high")
+  );
+});