feat(core): flatten provider config and load native packages (#35563)

Co-authored-by: Dax Raad <d@ironbay.co>

packages/llm/test/exports.test.ts

@@ -30,7 +30,6 @@ describe("public exports", () => {
 
   test("provider barrels expose user-facing facades", () => {
     expect(OpenAI.model).toBeFunction()
-    expect(OpenAI.provider.model).toBe(OpenAI.model)
     expect(OpenAI.provider.responses).toBe(OpenAI.responses)
     expect(OpenAI.provider.responsesWebSocket).toBe(OpenAI.responsesWebSocket)
     expect(OpenAI.configure({ apiKey: "fixture" }).responses).toBeFunction()

packages/llm/test/provider-package.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, test } from "bun:test"
+import { model } from "@opencode-ai/llm/providers/openai"
+
+describe("provider package entrypoints", () => {
+  test("semantic API aliases expose the same contract", async () => {
+    const modules = await Promise.all([
+      import("@opencode-ai/llm/providers/openai"),
+      import("@opencode-ai/llm/providers/openai/responses"),
+      import("@opencode-ai/llm/providers/openai/chat"),
+      import("@opencode-ai/llm/providers/anthropic"),
+      import("@opencode-ai/llm/providers/openai-compatible"),
+      import("@opencode-ai/llm/providers/amazon-bedrock"),
+    ])
+
+    for (const module of modules) expect(module.model).toBeFunction()
+    expect(modules[0].model).toBe(modules[1].model)
+  })
+
+  test("maps package settings onto the executable model", () => {
+    const selected = model("gpt-5", {
+      apiKey: "fixture",
+      baseURL: "https://api.openai.test/v1",
+      headers: { "x-application": "opencode" },
+      body: { service_tier: "priority" },
+      limits: { context: 200_000, output: 64_000 },
+      unrelatedInheritedSetting: true,
+    })
+
+    expect(selected.route.id).toBe("openai-responses")
+    expect(selected.route.defaults.headers).toEqual({ "x-application": "opencode" })
+    expect(selected.route.defaults.http?.body).toEqual({ service_tier: "priority" })
+    expect(selected.route.defaults.limits).toEqual({ context: 200_000, output: 64_000 })
+  })
+
+  test("selects transport without changing the semantic API", () => {
+    expect(model("gpt-5", { apiKey: "fixture" }).route.id).toBe("openai-responses")
+    expect(model("gpt-5", { apiKey: "fixture", transport: "websocket" }).route.id).toBe("openai-responses-websocket")
+  })
+
+  test("maps legacy OpenAI organization and project settings to headers", () => {
+    const selected = model("gpt-5", {
+      apiKey: "fixture",
+      organization: "org_123",
+      project: "proj_123",
+    })
+
+    expect(selected.route.defaults.headers).toMatchObject({
+      "OpenAI-Organization": "org_123",
+      "OpenAI-Project": "proj_123",
+    })
+  })
+})