test(core): simplify agent config layer wiring

packages/core/src/agent.ts

@@ -7,6 +7,7 @@ import { PermissionSchema } from "./permission/schema"
 import { ProviderV2 } from "./provider"
 import { PositiveInt } from "./schema"
 import { State } from "./state"
+import { LayerNode } from "./effect/layer-node"
 
 export const ID = Schema.String.pipe(Schema.brand("AgentV2.ID"))
 export type ID = typeof ID.Type
@@ -140,3 +141,4 @@ export const layer = Layer.effect(
 )
 
 export const locationLayer = layer
+export const node = LayerNode.make(layer, [])

packages/core/src/config.ts

@@ -24,7 +24,6 @@ import { ConfigToolOutput } from "./config/tool-output"
 import { ConfigWatcher } from "./config/watcher"
 import { ConfigV1 } from "./v1/config/config"
 import { ConfigMigrateV1 } from "./v1/config/migrate"
-import { LayerNode } from "./effect/layer-node"
 
 export class Info extends Schema.Class<Info>("Config.Info")({
   $schema: Schema.optional(Schema.String).annotate({
@@ -219,5 +218,3 @@ export const layer = Layer.effect(
 )
 
 export const locationLayer = layer.pipe(Layer.provideMerge(Policy.locationLayer))
-export const node = (location: LayerNode.Node<Location.Service>, policy = Policy.node(location)) =>
-  LayerNode.make(layer, [FSUtil.node, Global.node, location, policy])

packages/core/src/policy.ts

@@ -3,7 +3,6 @@ export * as Policy from "./policy"
 import { Context, Effect as EffectRuntime, Layer, Schema } from "effect"
 import { Wildcard } from "./util/wildcard"
 import { Location } from "./location"
-import { LayerNode } from "./effect/layer-node"
 
 export const Effect = Schema.Literals(["allow", "deny"]).annotate({ identifier: "Policy.Effect" })
 export type Effect = typeof Effect.Type
@@ -45,4 +44,3 @@ export const layer = Layer.effect(
 )
 
 export const locationLayer = layer
-export const node = (location: LayerNode.Node<Location.Service>) => LayerNode.make(layer, [location])

packages/core/test/config/agent.test.ts

@@ -1,17 +1,18 @@
 import { describe, expect } from "bun:test"
 import fs from "fs/promises"
 import path from "path"
-import { Effect, Layer, Schema } from "effect"
+import { Effect, Schema } from "effect"
 import { AgentV2 } from "@opencode-ai/core/agent"
 import { Config } from "@opencode-ai/core/config"
 import { ConfigAgentPlugin } from "@opencode-ai/core/config/plugin/agent"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { FSUtil } from "@opencode-ai/core/fs-util"
 import { PermissionV2 } from "@opencode-ai/core/permission"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { tmpdir } from "../fixture/tmpdir"
 import { testEffect } from "../lib/effect"
 
-const it = testEffect(Layer.mergeAll(AgentV2.locationLayer, FSUtil.defaultLayer))
+const it = testEffect(LayerNode.buildLayer(LayerNode.group([AgentV2.node, FSUtil.node])))
 const decode = Schema.decodeUnknownSync(Config.Info)
 
 describe("ConfigAgentPlugin.Plugin", () => {

packages/core/test/config/config.test.ts

@@ -5,9 +5,9 @@ import { Effect, Layer, Schema } from "effect"
 import { FastCheck } from "effect/testing"
 import { Config } from "@opencode-ai/core/config"
 import { ConfigProvider } from "@opencode-ai/core/config/provider"
-import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { ConfigMigrateV1 } from "@opencode-ai/core/v1/config/migrate"
 import { ConfigV1 } from "@opencode-ai/core/v1/config/config"
+import { FSUtil } from "@opencode-ai/core/fs-util"
 import { Global } from "@opencode-ai/core/global"
 import { Location } from "@opencode-ai/core/location"
 import { Policy } from "@opencode-ai/core/policy"
@@ -25,24 +25,21 @@ function testLayer(
   projectDirectory = directory,
   vcs?: Project.Vcs,
 ) {
-  const locationNode = LayerNode.make(
-    Layer.succeed(
-      Location.Service,
-      Location.Service.of(
-        location(
-          { directory: AbsolutePath.make(directory) },
-          { projectDirectory: AbsolutePath.make(projectDirectory), vcs },
+  return Config.locationLayer.pipe(
+    Layer.provide(FSUtil.defaultLayer),
+    Layer.provide(Global.layerWith({ config: globalDirectory })),
+    Layer.provide(
+      Layer.succeed(
+        Location.Service,
+        Location.Service.of(
+          location(
+            { directory: AbsolutePath.make(directory) },
+            { projectDirectory: AbsolutePath.make(projectDirectory), vcs },
+          ),
         ),
       ),
     ),
-    [],
   )
-  const policyNode = Policy.node(locationNode)
-  return LayerNode.buildLayer(LayerNode.group([Config.node(locationNode, policyNode), policyNode, locationNode]), {
-    replacements: [
-      LayerNode.replace(Global.node, Global.layerWith({ config: globalDirectory })),
-    ],
-  })
 }
 
 const provider = {