From 34a08cbdb807a3e3bcdd43ac7f570a75df0a899d Mon Sep 17 00:00:00 2001
From: Dax Raad <d@ironbay.co>
Date: Fri, 3 Jul 2026 14:45:56 -0400
Subject: [PATCH] fix(core): tolerate missing models.dev temperature

---
 packages/core/src/models-dev.ts   |  2 +-
 packages/core/test/models.test.ts | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/models-dev.ts b/packages/core/src/models-dev.ts
index 8a3fb965bfc..a88aebfe07c 100644
--- a/packages/core/src/models-dev.ts
+++ b/packages/core/src/models-dev.ts
@@ -67,7 +67,7 @@ export const Model = Schema.Struct({
   attachment: Schema.Boolean,
   reasoning: Schema.Boolean,
   reasoning_options: Schema.optional(Schema.Array(ReasoningOption)),
-  temperature: Schema.Boolean,
+  temperature: Schema.optional(Schema.Boolean),
   tool_call: Schema.Boolean,
   interleaved: Schema.optional(
     Schema.Union([
diff --git a/packages/core/test/models.test.ts b/packages/core/test/models.test.ts
index d9b7ed55827..9aa1cedc4df 100644
--- a/packages/core/test/models.test.ts
+++ b/packages/core/test/models.test.ts
@@ -149,6 +149,22 @@ describe("ModelsDev Service", () => {
     }),
   )
 
+  it.effect("allows models.dev entries without temperature metadata", () =>
+    Effect.sync(() => {
+      const result = Schema.decodeUnknownSync(ModelsDev.Model)({
+        id: "no-temperature-model",
+        name: "No Temperature Model",
+        release_date: "2026-01-01",
+        attachment: false,
+        reasoning: false,
+        tool_call: true,
+        limit: { context: 128000, output: 8192 },
+      })
+
+      expect(result.temperature).toBeUndefined()
+    }),
+  )
+
   it.live("get() returns providers from disk when cache file exists", () =>
     Effect.gen(function* () {
       yield* writeCache(fixture)