From 598f59e5469c11c5ef6ad583f0cf5130bee3614b Mon Sep 17 00:00:00 2001
From: Juan Camilo <juancamilo.auriti@gmail.com>
Date: Wed, 1 Apr 2026 15:34:08 +0200
Subject: [PATCH] fix: map tool_choice 'none' in OpenAI shim
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The Anthropic-to-OpenAI tool_choice mapping handled 'auto', 'any', and
'tool' but not 'none'. When 'none' was passed, the request was sent
without tool_choice, defaulting to 'auto' — the opposite of the
intended behavior (disable tool use).

Relates to #30

Co-Authored-By: Juan Camilo <juancamilo.auriti@gmail.com>
---
 src/services/api/openaiShim.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/services/api/openaiShim.ts b/src/services/api/openaiShim.ts
index f7a5f6b7..53c321f6 100644
--- a/src/services/api/openaiShim.ts
+++ b/src/services/api/openaiShim.ts
@@ -630,6 +630,8 @@ class OpenAIShimMessages {
             }
           } else if (tc.type === 'any') {
             body.tool_choice = 'required'
+          } else if (tc.type === 'none') {
+            body.tool_choice = 'none'
           }
         }
       }