From 1a2c403dce8d5951340fb62099884367b046aa7a Mon Sep 17 00:00:00 2001
From: Adilson <adilson.ssantos@gmail.com>
Date: Fri, 14 Aug 2026 12:07:47 -0300
Subject: [PATCH] fix(anthropic): drop invalid `name` field from
 output_config.format

Anthropic's Messages API structured-output field, output_config.format,
only accepts { type, schema }. Sending the extra `name` field (carried
over from OpenAI's json_schema.name / text.format.name conventions)
causes the live API to reject every structured-output request from the
anthropic provider with:

  400 output_config.format.name: Extra inputs are not permitted

Reproduced against the real API via a Karakeep auto-tagging request
routed through the anthropic provider (claude-haiku-4-5, /v1/chat/completions
with response_format.json_schema). Confirmed the fix resolves it end-to-end
against the live API, then updated the stale unit test that had asserted
the buggy behavior.

Affects both translator paths that build Anthropic requests:
- openaiToAnthropic (Chat Completions -> Anthropic)
- responsesToAnthropic (Responses API -> Anthropic)

The equivalent OpenAI-Responses-shaped output (chatToResponsesRequest,
text.format.name) is untouched -- that field is valid for OpenAI's own
Responses API and unrelated to this bug.
---
 src/upstream/translator.ts | 2 --
 tests/unit.test.ts         | 6 +++++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/upstream/translator.ts b/src/upstream/translator.ts
index 6410787..d4b14d2 100644
--- a/src/upstream/translator.ts
+++ b/src/upstream/translator.ts
@@ -201,7 +201,6 @@ export function openaiToAnthropic(body: any): any {
         format: {
           type: "json_schema",
           schema: fmt.json_schema.schema,
-          name: fmt.json_schema.name,
         },
       };
     } else if (fmt.type === "json_object") {
@@ -580,7 +579,6 @@ export function responsesToAnthropic(body: any): any {
         format: {
           type: "json_schema",
           schema: fmt.schema,
-          name: fmt.name,
         },
       };
     } else if (fmt.type === "json_object") {
diff --git a/tests/unit.test.ts b/tests/unit.test.ts
index 6f235d6..703b3da 100644
--- a/tests/unit.test.ts
+++ b/tests/unit.test.ts
@@ -568,7 +568,11 @@ test("openaiToAnthropic translates response_format json_schema", () => {
     },
   });
   assert.equal(result.output_config.format.type, "json_schema");
-  assert.equal(result.output_config.format.name, "test");
+  // Anthropic's Messages API rejects an extra `name` field here with
+  // "Extra inputs are not permitted" (verified against the live API) --
+  // unlike OpenAI's json_schema format, Anthropic's output_config.format
+  // only accepts { type, schema }.
+  assert.equal(result.output_config.format.name, undefined);
 });
 
 test("openaiToAnthropic translates tool role messages", () => {