From b7f4ad6cf61bcca11e052f19c2f2b653aaf818be Mon Sep 17 00:00:00 2001
From: Andrey Nering <andreynering@users.noreply.github.com>
Date: Fri, 29 May 2026 17:14:33 -0300
Subject: [PATCH] fix(opencode): fix qwen3.7-max on opencode (#3040)

* Closes #3027

This model only work on the Anthropic Messages API.
---
 internal/agent/coordinator.go | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/internal/agent/coordinator.go b/internal/agent/coordinator.go
index d4c05951e6af1e0243ca80df9dba9410c1529936..a26aa111eeb8e45a699a6aab90774f04a1aca4bb 100644
--- a/internal/agent/coordinator.go
+++ b/internal/agent/coordinator.go
@@ -72,6 +72,11 @@ var copilotResponsesModels = map[string]bool{
 	"gpt-5-mini":    true,
 }
 
+// OpenCode models that user Anthropic Messages API instead of Chat Completions.
+var opencodeMessagesModels = map[string]bool{
+	"qwen3.7-max": true,
+}
+
 type Coordinator interface {
 	// INFO: (kujtim) this is not used yet we will use this when we have multiple agents
 	// SetMainAgent(string)
@@ -791,7 +796,8 @@ func (c *coordinator) buildOpenaiCompatProvider(baseURL, apiKey string, headers
 
 	// Set HTTP client based on provider and debug mode.
 	var httpClient *http.Client
-	if providerID == string(catwalk.InferenceProviderCopilot) {
+	switch providerID {
+	case string(catwalk.InferenceProviderCopilot):
 		opts = append(
 			opts,
 			openaicompat.WithUseResponsesAPI(),
@@ -800,7 +806,8 @@ func (c *coordinator) buildOpenaiCompatProvider(baseURL, apiKey string, headers
 			}),
 		)
 		httpClient = copilot.NewClient(isSubAgent, c.cfg.Config().Options.Debug)
-	} else if c.cfg.Config().Options.Debug {
+	}
+	if httpClient == nil && c.cfg.Config().Options.Debug {
 		httpClient = log.NewHTTPClient()
 	}
 	if httpClient != nil {
@@ -929,6 +936,14 @@ func (c *coordinator) buildProvider(providerCfg config.ProviderConfig, model con
 	apiKey, _ := c.cfg.Resolve(providerCfg.APIKey)
 	baseURL, _ := c.cfg.Resolve(providerCfg.BaseURL)
 
+	switch providerCfg.ID {
+	case string(catwalk.InferenceProviderOpenCodeGo), string(catwalk.InferenceProviderOpenCodeZen):
+		if opencodeMessagesModels[model.Model] {
+			baseURL = strings.TrimSuffix(baseURL, "/v1")
+			return c.buildAnthropicProvider(baseURL, apiKey, headers, providerCfg.ID)
+		}
+	}
+
 	switch providerCfg.Type {
 	case openai.Name:
 		return c.buildOpenaiProvider(baseURL, apiKey, headers)