Fix metadata injection for provider options; rename and extend metadata fields.

Author: tisoz

packages/opencode/src/provider/provider.ts

@@ -998,13 +998,16 @@ export namespace Provider {
           opts.signal = combined
         }
 
-        // Inject metadata from model.options if enableMeta is set
+        // Inject metadata from provider.options if enableMeta is set
         if (provider.options?.enableMeta && opts.body && opts.method === "POST") {
           try {
-            options.headers["x-opencode-session"] = model.options.metadata.user_id
+            options.headers["x-opencode-session"] = model.options.metadata.user_session_id
 
             const body = JSON.parse(opts.body as string)
-            body.metadata = model.options.metadata
+            body.metadata ||= {}
+            body.metadata.user_id = model.options.metadata.user_session_id
+            body.metadata.project_id = model.options.metadata.project_id
+            body.metadata.session_id = model.options.metadata.session_id
             opts.body = JSON.stringify(body)
           } catch {}
         }

packages/opencode/src/session/llm.ts

@@ -64,7 +64,7 @@ export namespace LLM {
     ])
     if (provider.options?.enableMeta) {
       input.model.options.metadata = {
-        user_id: `user_${Instance.project.id ?? "unknown"}_account__session_${input.sessionID}`,
+        user_session_id: `user_${Instance.project.id ?? "unknown"}_account__session_${input.sessionID}`,
         project_id: Instance.project.id,
         session_id: input.sessionID,
       }