4 files changed, 94 insertions, 27 deletions

diff --git a/js/src/llm/llm.ts b/js/src/llm/llm.ts
index 5d962219c..c0ab38530 100644
--- a/js/src/llm/llm.ts
+++ b/js/src/llm/llm.ts
@@ -1,9 +1,13 @@
 import { App } from "../app";
 import { Log } from "../util/log";
+import { mergeDeep } from "remeda";
+import path from "node:path";
 
-import { createAnthropic } from "@ai-sdk/anthropic";
 import type { LanguageModel, Provider } from "ai";
 import { NoSuchModelError } from "ai";
+import type { Config } from "../app/config";
+import { BunProc } from "../bun";
+import { Global } from "../global";
 
 export namespace LLM {
   const log = Log.create({ service: "llm" });
@@ -14,17 +18,67 @@ export namespace LLM {
     }
   }
 
+  const NATIVE_PROVIDERS: Record<string, Config.Provider> = {
+    anthropic: {
+      models: {
+        "claude-sonnet-4-20250514": {
+          name: "Claude 4 Sonnet",
+          cost: {
+            input: 3.0,
+            inputCached: 3.75,
+            output: 15.0,
+            outputCached: 0.3,
+          },
+          contextWindow: 200000,
+          maxTokens: 50000,
+          attachment: true,
+        },
+      },
+    },
+  };
+
+  const AUTODETECT: Record<string, string[]> = {
+    anthropic: ["ANTHROPIC_API_KEY"],
+  };
+
   const state = App.state("llm", async (app) => {
-    const providers: Provider[] = [];
-
-    if (process.env["ANTHROPIC_API_KEY"] || app.config.providers?.anthropic) {
-      log.info("loaded anthropic");
-      const provider = createAnthropic({
-        apiKey: app.config.providers?.anthropic?.apiKey,
-        baseURL: app.config.providers?.anthropic?.baseURL,
-        headers: app.config.providers?.anthropic?.headers,
-      });
-      providers.push(provider);
+    const providers: Record<
+      string,
+      {
+        info: Config.Provider;
+        instance: Provider;
+      }
+    > = {};
+
+    const list = mergeDeep(NATIVE_PROVIDERS, app.config.providers ?? {});
+
+    for (const [providerID, providerInfo] of Object.entries(list)) {
+      if (
+        !app.config.providers?.[providerID] &&
+        !AUTODETECT[providerID]?.some((env) => process.env[env])
+      )
+        continue;
+      const dir = path.join(
+        Global.cache(),
+        `node_modules`,
+        `@ai-sdk`,
+        providerID,
+      );
+      if (!(await Bun.file(path.join(dir, "package.json")).exists())) {
+        BunProc.run(["add", "--exact", `@ai-sdk/${providerID}@alpha`], {
+          cwd: Global.cache(),
+        });
+      }
+      const mod = await import(
+        path.join(Global.cache(), `node_modules`, `@ai-sdk`, providerID)
+      );
+      const fn = mod[Object.keys(mod).find((key) => key.startsWith("create"))!];
+      const loaded = fn(providerInfo.options);
+      log.info("loaded", { provider: providerID });
+      providers[providerID] = {
+        info: providerInfo,
+        instance: loaded,
+      };
     }
 
     return {
@@ -37,23 +91,24 @@ export namespace LLM {
     return state().then((state) => state.providers);
   }
 
-  export async function findModel(model: string) {
+  export async function findModel(providerID: string, modelID: string) {
+    const key = `${providerID}/${modelID}`;
     const s = await state();
-    if (s.models.has(model)) {
-      return s.models.get(model)!;
-    }
-    log.info("loading", { model });
-    for (const provider of s.providers) {
-      try {
-        const match = provider.languageModel(model);
-        log.info("found", { model });
-        s.models.set(model, match);
-        return match;
-      } catch (e) {
-        if (e instanceof NoSuchModelError) continue;
-        throw e;
-      }
+    if (s.models.has(key)) return s.models.get(key)!;
+    const provider = s.providers[providerID];
+    if (!provider) throw new ModelNotFoundError(modelID);
+    log.info("loading", {
+      providerID,
+      modelID,
+    });
+    try {
+      const match = provider.instance.languageModel(modelID);
+      log.info("found", { providerID, modelID });
+      s.models.set(key, match);
+      return match;
+    } catch (e) {
+      if (e instanceof NoSuchModelError) throw new ModelNotFoundError(modelID);
+      throw e;
     }
-    throw new ModelNotFoundError(model);
   }
 }
diff --git a/js/src/llm/models/anthropic.ts b/js/src/llm/models/anthropic.ts
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/llm/models/anthropic.ts
diff --git a/js/src/llm/models/index.ts b/js/src/llm/models/index.ts
new file mode 100644
index 000000000..f974b4d3e
--- /dev/null
+++ b/js/src/llm/models/index.ts
@@ -0,0 +1 @@
+export * as anthropic from "./anthropic";
diff --git a/js/src/llm/models/model.ts b/js/src/llm/models/model.ts
new file mode 100644
index 000000000..e78dbb87f
--- /dev/null
+++ b/js/src/llm/models/model.ts
@@ -0,0 +1,11 @@
+export interface ModelInfo {
+  cost: {
+    input: number;
+    inputCached: number;
+    output: number;
+    outputCached: number;
+  };
+  contextWindow: number;
+  maxTokens: number;
+  attachment: boolean;
+}