feat: make gh copilot use msgs api when available (#22106)

packages/opencode/src/plugin/github-copilot/models.ts

@@ -52,13 +52,15 @@ export namespace CopilotModels {
       (remote.capabilities.supports.vision ?? false) ||
       (remote.capabilities.limits.vision?.supported_media_types ?? []).some((item) => item.startsWith("image/"))
 
+    const isMsgApi = remote.supported_endpoints?.includes("/v1/messages")
+
     return {
       id: key,
       providerID: "github-copilot",
       api: {
         id: remote.id,
-        url,
-        npm: "@ai-sdk/github-copilot",
+        url: isMsgApi ? `${url}/v1` : url,
+        npm: isMsgApi ? "@ai-sdk/anthropic" : "@ai-sdk/github-copilot",
       },
       // API response wins
       status: "active",