From dc63ad0ad2ec73014fb99f6c840a4ddea802b806 Mon Sep 17 00:00:00 2001
From: B1GGersnow <2642448440@qq.com>
Date: Sat, 25 Apr 2026 00:37:54 +0800
Subject: [PATCH] fix(anthropic): cap max_tokens at 65536 for Qwen models via
 DashScope
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DashScope's Anthropic-compatible endpoint enforces max_tokens ∈ [1, 65536].
Adding "qwen3" to _ANTHROPIC_OUTPUT_LIMITS prevents 400 errors that were
misclassified as context overflow, triggering premature compression.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
---
 agent/anthropic_adapter.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/agent/anthropic_adapter.py b/agent/anthropic_adapter.py
index 8d8334acd1..7cdac560b1 100644
--- a/agent/anthropic_adapter.py
+++ b/agent/anthropic_adapter.py
@@ -105,6 +105,9 @@ _ANTHROPIC_OUTPUT_LIMITS = {
     "claude-3-haiku":      4_096,
     # Third-party Anthropic-compatible providers
     "minimax":            131_072,
+    # Qwen models via DashScope Anthropic-compatible endpoint
+    # DashScope enforces max_tokens ∈ [1, 65536]
+    "qwen3":               65_536,
 }
 
 # For any model not in the table, assume the highest current limit.