test(core): simplify session prompt layer wiring

packages/core/src/session.ts

@@ -29,6 +29,7 @@ import { logFailure } from "./session/logging"
 import { MessageDecodeError } from "./session/error"
 import { SessionEvent } from "./session/event"
 import { SessionInput } from "./session/input"
+import { LayerNode } from "./effect/layer-node"
 
 // get project -> project.locations
 //
@@ -425,6 +426,15 @@ export const layer = Layer.effect(
   }),
 )
 
+export const node = LayerNode.make(layer, [
+  SessionExecution.node,
+  SessionStore.node,
+  SessionProjector.node,
+  EventV2.node,
+  Database.node,
+  ProjectV2.node,
+])
+
 export const defaultLayer = layer.pipe(
   Layer.provide(SessionExecution.noopLayer),
   Layer.provide(SessionStore.defaultLayer),

packages/core/src/session/execution.ts

@@ -3,6 +3,7 @@ export * as SessionExecution from "./execution"
 import { Context, Effect, Layer } from "effect"
 import { SessionRunner } from "./runner/index"
 import { SessionSchema } from "./schema"
+import { LayerNode } from "../effect/layer-node"
 
 export interface Interface {
   /** Explicitly drain one Session, making at least one provider attempt. */
@@ -21,3 +22,5 @@ export const noopLayer = Layer.succeed(
   Service,
   Service.of({ resume: () => Effect.void, wake: () => Effect.void, interrupt: () => Effect.void }),
 )
+
+export const node = LayerNode.make(noopLayer, [])

packages/core/src/session/store.ts

@@ -9,6 +9,7 @@ import { SessionMessage } from "./message"
 import { SessionSchema } from "./schema"
 import { SessionMessageTable, SessionTable } from "./sql"
 import { fromRow } from "./info"
+import { LayerNode } from "../effect/layer-node"
 
 export interface Interface {
   readonly get: (sessionID: SessionSchema.ID) => Effect.Effect<SessionSchema.Info | undefined>
@@ -59,4 +60,6 @@ export const layer = Layer.effect(
   }),
 )
 
+export const node = LayerNode.make(layer, [Database.node])
+
 export const defaultLayer = layer.pipe(Layer.provide(Database.defaultLayer))

packages/core/test/models.test.ts

@@ -6,8 +6,6 @@ import { Flag } from "@opencode-ai/core/flag/flag"
 import { Global } from "@opencode-ai/core/global"
 import { ModelsDev } from "@opencode-ai/core/models-dev"
 import { EventV2 } from "@opencode-ai/core/event"
-import { LayerNode } from "@opencode-ai/core/effect/layer-node"
-import { httpClient } from "@opencode-ai/core/effect/layer-node-platform"
 import { it } from "./lib/effect"
 import { readFile, rm, writeFile, utimes, mkdir } from "fs/promises"
 import path from "path"
@@ -92,11 +90,10 @@ const buildLayer = (state: Ref.Ref<MockState>) =>
   // Layer.fresh is required: ModelsDev.layer is a module-level Layer constant,
   // and Effect.provide uses a process-global MemoMap by default — without fresh,
   // every test would reuse the cachedInvalidateWithTTL state from the first run.
-  LayerNode.buildLayer(
+  Layer.fresh(ModelsDev.layer).pipe(
-    LayerNode.group([LayerNode.make(Layer.fresh(ModelsDev.layer), [FSUtil.node, EventV2.node, httpClient])]),
+    Layer.provide(Layer.succeed(HttpClient.HttpClient, makeMockClient(state))),
-    {
+    Layer.provide(FSUtil.defaultLayer),
-      replacements: [LayerNode.replace(httpClient, Layer.succeed(HttpClient.HttpClient, makeMockClient(state)))],
+    Layer.provide(EventV2.defaultLayer),
-    },
   )
 
 const writeCacheText = (text: string, mtimeMs?: number) =>

packages/core/test/session-prompt.test.ts

@@ -15,13 +15,10 @@ import { SessionProjector } from "@opencode-ai/core/session/projector"
 import { SessionExecution } from "@opencode-ai/core/session/execution"
 import { SessionInput } from "@opencode-ai/core/session/input"
 import { SessionInputTable, SessionMessageTable, SessionTable } from "@opencode-ai/core/session/sql"
-import { SessionStore } from "@opencode-ai/core/session/store"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { testEffect } from "./lib/effect"
 
 const database = Database.layerFromPath(":memory:")
-const events = EventV2.layer.pipe(Layer.provide(database))
-const projector = SessionProjector.layer.pipe(Layer.provide(events), Layer.provide(database))
-const store = SessionStore.layer.pipe(Layer.provide(database))
 const executionCalls: SessionV2.ID[] = []
 const interruptCalls: SessionV2.ID[] = []
 const interruptSeqs: Array<number | undefined> = []
@@ -46,14 +43,12 @@ const execution = Layer.succeed(
       }),
   }),
 )
-const sessions = SessionV2.layer.pipe(
+const root = LayerNode.group([SessionV2.node, SessionProjector.node, EventV2.node, Database.node])
-  Layer.provide(events),
+const it = testEffect(
-  Layer.provide(database),
+  LayerNode.buildLayer(root, {
-  Layer.provide(store),
+    replacements: [LayerNode.replace(Database.node, database), LayerNode.replace(SessionExecution.node, execution)],
-  Layer.provide(Project.defaultLayer),
+  }),
-  Layer.provide(execution),
 )
-const it = testEffect(Layer.mergeAll(database, events, projector, store, execution, sessions))
 const sessionID = SessionV2.ID.make("ses_prompt_test")
 const messageID = SessionMessage.ID.create()