feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/core/test/plugin/provider-xai.test.ts

@@ -0,0 +1,116 @@
+import { describe, expect } from "bun:test"
+import { Effect, Layer } from "effect"
+import { EventV2 } from "@opencode-ai/core/event"
+import { ModelV2 } from "@opencode-ai/core/model"
+import { PluginV2 } from "@opencode-ai/core/plugin"
+import { XAIPlugin } from "@opencode-ai/core/plugin/provider/xai"
+import { ProviderV2 } from "@opencode-ai/core/provider"
+import { testEffect } from "../lib/effect"
+import { fakeSelectorSdk } from "./provider-helper"
+
+const it = testEffect(PluginV2.locationLayer.pipe(Layer.provide(EventV2.defaultLayer)))
+
+const model = new ModelV2.Info({
+  ...ModelV2.Info.empty(ProviderV2.ID.make("xai"), ModelV2.ID.make("grok-4")),
+  api: {
+    id: ModelV2.ID.make("grok-4"),
+    type: "aisdk",
+    package: "@ai-sdk/xai",
+  },
+})
+
+describe("XAIPlugin", () => {
+  it.effect("creates an xAI SDK only for @ai-sdk/xai", () =>
+    Effect.gen(function* () {
+      const plugin = yield* PluginV2.Service
+      yield* plugin.add(XAIPlugin)
+
+      const ignored = yield* plugin.trigger(
+        "aisdk.sdk",
+        { model, package: "@ai-sdk/openai-compatible", options: {} },
+        {},
+      )
+
+      const result = yield* plugin.trigger("aisdk.sdk", { model, package: "@ai-sdk/xai", options: {} }, {})
+
+      expect(ignored.sdk).toBeUndefined()
+      expect(typeof result.sdk?.responses).toBe("function")
+    }),
+  )
+
+  it.effect("creates xAI SDKs for custom provider IDs", () =>
+    Effect.gen(function* () {
+      const plugin = yield* PluginV2.Service
+      const providers: string[] = []
+
+      yield* plugin.add(XAIPlugin)
+      yield* plugin.add(
+        PluginV2.define({
+          id: PluginV2.ID.make("xai-sdk-name-observer"),
+          effect: Effect.gen(function* () {
+            return {
+              "aisdk.sdk": Effect.fn(function* (evt) {
+                if (!evt.sdk) return
+                providers.push(evt.sdk.responses("grok-4").provider)
+              }),
+            }
+          }),
+        }),
+      )
+
+      yield* plugin.trigger(
+        "aisdk.sdk",
+        {
+          model: new ModelV2.Info({ ...model, providerID: ProviderV2.ID.make("custom-xai") }),
+          package: "@ai-sdk/xai",
+          options: {},
+        },
+        {},
+      )
+
+      expect(providers).toEqual(["xai.responses"])
+    }),
+  )
+
+  it.effect("uses responses with the model api.id for xAI language models", () =>
+    Effect.gen(function* () {
+      const plugin = yield* PluginV2.Service
+      const calls: string[] = []
+
+      yield* plugin.add(XAIPlugin)
+      const result = yield* plugin.trigger(
+        "aisdk.language",
+        {
+          model: new ModelV2.Info({ ...model, id: ModelV2.ID.make("alias") }),
+          sdk: fakeSelectorSdk(calls),
+          options: {},
+        },
+        {},
+      )
+
+      expect(calls).toEqual(["responses:grok-4"])
+      expect(result.language).toBeDefined()
+    }),
+  )
+
+  it.effect("ignores non-xAI providers", () =>
+    Effect.gen(function* () {
+      const plugin = yield* PluginV2.Service
+      const calls: string[] = []
+
+      yield* plugin.add(XAIPlugin)
+      const result = yield* plugin.trigger(
+        "aisdk.language",
+        {
+          model: new ModelV2.Info({ ...model, providerID: ProviderV2.ID.openai }),
+          sdk: fakeSelectorSdk(calls),
+          options: {},
+        },
+        {},
+      )
+
+      expect(calls).toEqual([])
+      expect(result.language).toBeUndefined()
+    }),
+  )
+})