From 1c91c46326cbcf7fd4c2546183b5c6a495198a8d Mon Sep 17 00:00:00 2001
From: Chris Weller <chris@weller.co>
Date: Sun, 26 Apr 2026 14:53:25 -0600
Subject: [PATCH] fix(proxy): avoid settings override and nested reasoning for
 openai-compat

---
 src/ccs.ts                                             |  6 +-----
 src/proxy/transformers/request-transformer.ts          | 10 +---------
 .../request-transformer-regressions.test.ts            |  4 ++--
 .../proxy/transformers/request-transformer.test.ts     |  2 +-
 4 files changed, 5 insertions(+), 17 deletions(-)

diff --git a/src/ccs.ts b/src/ccs.ts
index 23389316..24bb75be 100644
--- a/src/ccs.ts
+++ b/src/ccs.ts
@@ -1460,11 +1460,7 @@ async function main(): Promise<void> {
         };
         delete proxyEnv.ANTHROPIC_API_KEY;
 
-        const launchArgs = [
-          '--settings',
-          expandedSettingsPath,
-          ...appendThirdPartyWebSearchToolArgs(browserArgs),
-        ];
+        const launchArgs = [...appendThirdPartyWebSearchToolArgs(browserArgs)];
         const traceEnv = createWebSearchTraceContext({
           launcher: 'ccs.settings-profile.proxy',
           args: launchArgs,
diff --git a/src/proxy/transformers/request-transformer.ts b/src/proxy/transformers/request-transformer.ts
index 58e7969e..b5877bd6 100644
--- a/src/proxy/transformers/request-transformer.ts
+++ b/src/proxy/transformers/request-transformer.ts
@@ -362,7 +362,7 @@ function transformToolChoice(
 function mapThinkingToReasoning(
   thinking: AnthropicThinking | undefined,
   outputConfig: AnthropicOutputConfig | undefined
-): Pick<ProxyOpenAIRequest, 'reasoning' | 'reasoning_effort'> {
+): Pick<ProxyOpenAIRequest, 'reasoning_effort'> {
   if (!thinking || thinking.type === 'disabled') {
     return {};
   }
@@ -371,10 +371,6 @@ function mapThinkingToReasoning(
     const effort = toOpenAIEffort(resolveOutputConfigEffort(outputConfig) ?? 'high');
     return {
       reasoning_effort: effort,
-      reasoning: {
-        enabled: true,
-        effort,
-      },
     };
   }
 
@@ -389,10 +385,6 @@ function mapThinkingToReasoning(
 
   return {
     reasoning_effort: effort,
-    reasoning: {
-      enabled: true,
-      effort,
-    },
   };
 }
 
diff --git a/tests/unit/proxy/transformers/request-transformer-regressions.test.ts b/tests/unit/proxy/transformers/request-transformer-regressions.test.ts
index 4bb3192f..9e4bc5a8 100644
--- a/tests/unit/proxy/transformers/request-transformer-regressions.test.ts
+++ b/tests/unit/proxy/transformers/request-transformer-regressions.test.ts
@@ -27,7 +27,7 @@ describe('ProxyRequestTransformer regressions', () => {
     });
 
     expect(result.reasoning_effort).toBe('high');
-    expect(result.reasoning).toEqual({ enabled: true, effort: 'high' });
+    expect(result.reasoning).toBeUndefined();
   });
 
   it('explicitly normalizes anthropic xhigh adaptive effort for OpenAI-compatible upstreams', () => {
@@ -38,7 +38,7 @@ describe('ProxyRequestTransformer regressions', () => {
     });
 
     expect(result.reasoning_effort).toBe('high');
-    expect(result.reasoning).toEqual({ enabled: true, effort: 'high' });
+    expect(result.reasoning).toBeUndefined();
   });
 
   it('rejects unsupported thinking types instead of silently dropping them', () => {
diff --git a/tests/unit/proxy/transformers/request-transformer.test.ts b/tests/unit/proxy/transformers/request-transformer.test.ts
index 25687c20..543361a1 100644
--- a/tests/unit/proxy/transformers/request-transformer.test.ts
+++ b/tests/unit/proxy/transformers/request-transformer.test.ts
@@ -28,7 +28,7 @@ describe('ProxyRequestTransformer', () => {
 
     expect(result.stream).toBe(true);
     expect(result.reasoning_effort).toBe('high');
-    expect(result.reasoning).toEqual({ enabled: true, effort: 'high' });
+    expect(result.reasoning).toBeUndefined();
     expect(result.max_tokens).toBe(1024);
     expect(result.temperature).toBe(0.2);
     expect(result.top_p).toBe(0.9);