From 6e2e583d3b1534db10b41ce6c320e46ab9b1431e Mon Sep 17 00:00:00 2001
From: wgu9 <145739220+wgu9@users.noreply.github.com>
Date: Sun, 14 Jun 2026 07:33:16 -0700
Subject: [PATCH] fix: allow partial provider model limits

---
 packages/core/src/v1/config/provider.ts      |  4 +--
 packages/opencode/test/config/config.test.ts | 34 ++++++++++++++++++++
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/packages/core/src/v1/config/provider.ts b/packages/core/src/v1/config/provider.ts
index d54a3f08f926..588c562fadc2 100644
--- a/packages/core/src/v1/config/provider.ts
+++ b/packages/core/src/v1/config/provider.ts
@@ -40,9 +40,9 @@ export const Model = Schema.Struct({
   ),
   limit: Schema.optional(
     Schema.Struct({
-      context: Schema.Finite,
+      context: Schema.optional(Schema.Finite),
       input: Schema.optional(Schema.Finite),
-      output: Schema.Finite,
+      output: Schema.optional(Schema.Finite),
     }),
   ),
   modalities: Schema.optional(
diff --git a/packages/opencode/test/config/config.test.ts b/packages/opencode/test/config/config.test.ts
index 02ace5366880..7358541bcc39 100644
--- a/packages/opencode/test/config/config.test.ts
+++ b/packages/opencode/test/config/config.test.ts
@@ -1339,6 +1339,40 @@ test("config parser preserves permission order while rejecting unknown top-level
   }
 })
 
+test("provider model limits can specify token fields independently", () => {
+  const config = ConfigParse.schema(
+    ConfigV1.Info,
+    {
+      provider: {
+        custom: {
+          models: {
+            "context-only": {
+              limit: {
+                context: 1_000_000,
+              },
+            },
+            "output-only": {
+              limit: {
+                output: 16_384,
+              },
+            },
+            "input-only": {
+              limit: {
+                input: 512_000,
+              },
+            },
+          },
+        },
+      },
+    },
+    "test",
+  )
+
+  expect(config.provider?.custom.models?.["context-only"]?.limit).toEqual({ context: 1_000_000 })
+  expect(config.provider?.custom.models?.["output-only"]?.limit).toEqual({ output: 16_384 })
+  expect(config.provider?.custom.models?.["input-only"]?.limit).toEqual({ input: 512_000 })
+})
+
 // MCP config merging tests
 
 it.instance("project config can override MCP server enabled status", () =>