Enhance provider system with dynamic package resolution and improved logging

- Add npm registry lookup for AI SDK packages with fallback support
- Enhance error logging with cause information
- Add timing deltas to log output for performance monitoring

🤖 Generated with [opencode](https://opencode.ai)

Co-Authored-By: opencode <noreply@opencode.ai>

packages/opencode/src/provider/models.ts

@@ -1,4 +1,5 @@
 import { Global } from "../global"
+import { lazy } from "../util/lazy"
 import { Log } from "../util/log"
 import path from "path"
 import { z } from "zod"
@@ -62,4 +63,30 @@ export namespace ModelsDev {
       throw new Error(`Failed to fetch models.dev: ${result.statusText}`)
     await Bun.write(file, result)
   }
+
+  const aisdk = lazy(async () => {
+    log.info("fetching ai-sdk")
+    const response = await fetch(
+      "https://registry.npmjs.org/-/v1/search?text=scope:@ai-sdk",
+    )
+    if (!response.ok)
+      throw new Error(
+        `Failed to fetch ai-sdk information: ${response.statusText}`,
+      )
+    const result = await response.json()
+    log.info("found ai-sdk", result.objects.length)
+    return result.objects
+      .filter((obj: any) => obj.package.name.startsWith("@ai-sdk/"))
+      .reduce((acc: any, obj: any) => {
+        acc[obj.package.name] = obj
+        return acc
+      }, {})
+  })
+
+  export async function pkg(providerID: string): Promise<[string, string]> {
+    const packages = await aisdk()
+    const match = packages[`@ai-sdk/${providerID}`]
+    if (match) return [match.package.name, "alpha"]
+    return [providerID, "latest"]
+  }
 }

packages/opencode/src/provider/provider.ts

@@ -186,9 +186,8 @@ export namespace Provider {
       const s = await state()
       const existing = s.sdk.get(providerID)
       if (existing) return existing
-      const mod = await import(
-        await BunProc.install(`@ai-sdk/${providerID}`, "alpha")
-      )
+      const [pkg, version] = await ModelsDev.pkg(providerID)
+      const mod = await import(await BunProc.install(pkg, version))
       const fn = mod[Object.keys(mod).find((key) => key.startsWith("create"))!]
       const loaded = fn(s.providers[providerID]?.options)
       s.sdk.set(providerID, loaded)