From b49b8380a5fbc49acc94db0dda0944dec6e0ba30 Mon Sep 17 00:00:00 2001
From: George Pickett <gpickett00@gmail.com>
Date: Sun, 8 Feb 2026 14:04:58 -0800
Subject: [PATCH] test(config): cover maxTokens clamping

---
 src/config/defaults.ts                  |  1 -
 src/config/model-alias-defaults.test.ts | 19 +++++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/config/defaults.ts b/src/config/defaults.ts
index 7d804a40b5..290cde5699 100644
--- a/src/config/defaults.ts
+++ b/src/config/defaults.ts
@@ -215,7 +215,6 @@ export function applyModelDefaults(cfg: OpenClawConfig): OpenClawConfig {
         }
 
         const defaultMaxTokens = Math.min(DEFAULT_MODEL_MAX_TOKENS, contextWindow);
-        // Clamp maxTokens to contextWindow to prevent invalid configurations
         const rawMaxTokens = isPositiveNumber(raw.maxTokens) ? raw.maxTokens : defaultMaxTokens;
         const maxTokens = Math.min(rawMaxTokens, contextWindow);
         if (raw.maxTokens !== maxTokens) {
diff --git a/src/config/model-alias-defaults.test.ts b/src/config/model-alias-defaults.test.ts
index 82bff85dad..b2db55c570 100644
--- a/src/config/model-alias-defaults.test.ts
+++ b/src/config/model-alias-defaults.test.ts
@@ -80,4 +80,23 @@ describe("applyModelDefaults", () => {
     expect(model?.contextWindow).toBe(DEFAULT_CONTEXT_TOKENS);
     expect(model?.maxTokens).toBe(8192);
   });
+
+  it("clamps maxTokens to contextWindow", () => {
+    const cfg = {
+      models: {
+        providers: {
+          myproxy: {
+            api: "openai-completions",
+            models: [{ id: "gpt-5.2", name: "GPT-5.2", contextWindow: 32768, maxTokens: 40960 }],
+          },
+        },
+      },
+    } satisfies OpenClawConfig;
+
+    const next = applyModelDefaults(cfg);
+    const model = next.models?.providers?.myproxy?.models?.[0];
+
+    expect(model?.contextWindow).toBe(32768);
+    expect(model?.maxTokens).toBe(32768);
+  });
 });