chore: merge dev into v2 (#34317)

Co-authored-by: Brendan Allan <14191578+Brendonovich@users.noreply.github.com>
Co-authored-by: opencode-agent[bot] <opencode-agent[bot]@users.noreply.github.com>
Co-authored-by: Affan Ali <93028901+affanali2k3@users.noreply.github.com>
Co-authored-by: affanali2k3 <affanalikhanxx@gmail.com>
Co-authored-by: Frank <frank@anoma.ly>
Co-authored-by: opencode-agent[bot] <219766164+opencode-agent[bot]@users.noreply.github.com>
Co-authored-by: James Long <longster@gmail.com>
Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com>
Co-authored-by: Jay V <air@live.ca>
Co-authored-by: Dax Raad <d@ironbay.co>
Co-authored-by: Aarav Sareen <96787824+arvsrn@users.noreply.github.com>
Co-authored-by: OpeOginni <107570612+OpeOginni@users.noreply.github.com>
Co-authored-by: Luke Parker <10430890+Hona@users.noreply.github.com>
Co-authored-by: Ben Guthrie <benjee.012@gmail.com>
Co-authored-by: Dax <mail@thdxr.com>
Co-authored-by: Filip <34747899+neriousy@users.noreply.github.com>

packages/core/test/effect/cross-spawn-spawner.test.ts

@@ -6,9 +6,10 @@ import { Effect, Exit, Stream } from "effect"
 import type * as PlatformError from "effect/PlatformError"
 import { ChildProcess, ChildProcessSpawner } from "effect/unstable/process"
 import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { testEffect } from "../lib/effect"
 
-const live = CrossSpawnSpawner.defaultLayer
+const live = LayerNode.compile(CrossSpawnSpawner.node)
 const fx = testEffect(live)
 
 function js(code: string, opts?: ChildProcess.CommandOptions) {

packages/core/test/effect/layer-node/layer-node-types.test.ts

@@ -0,0 +1,136 @@
+import { test } from "bun:test"
+import { Context, Effect, Layer } from "effect"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
+import { makeGlobalNode, makeLocationNode } from "@opencode-ai/core/effect/app-node"
+
+class A extends Context.Service<A, {}>()("test/LayerNodeA") {}
+class B extends Context.Service<B, {}>()("test/LayerNodeB") {}
+class C extends Context.Service<C, {}>()("test/LayerNodeC") {}
+class LayerError {
+  readonly _tag = "LayerError"
+}
+class OtherError {
+  readonly _tag = "OtherError"
+}
+
+const tags = LayerNode.tags({ app: [] })
+const make = tags.make("app")
+const build = <A, E>(root: LayerNode.Node<A, E, any>) => LayerNode.compile(root) as Layer.Layer<A, E>
+const aLayer = Layer.succeed(A, A.of({}))
+const bLayer = Layer.effect(B, Effect.as(A, B.of({})))
+const cLayer = Layer.effect(
+  C,
+  Effect.gen(function* () {
+    yield* A
+    yield* B
+    return C.of({})
+  }),
+)
+const failingA = Layer.effect(A, Effect.fail(new LayerError()))
+const a = make({ service: A, layer: aLayer, deps: [] })
+const b = make({ service: B, layer: bLayer, deps: [a] })
+const c = make({ service: C, layer: cLayer, deps: [a, b] })
+const failing = make({ service: A, layer: failingA, deps: [] })
+const dependent = make({ service: B, layer: bLayer, deps: [failing] })
+const inputA = LayerNode.unbound(A, tags.values.app)
+const inputDependent = make({ service: B, layer: bLayer, deps: [inputA] })
+
+make({ name: "manual-a", layer: aLayer, deps: [] })
+
+// @ts-expect-error A node must have a service or name
+make({ layer: aLayer, deps: [] })
+
+// @ts-expect-error Service and name are mutually exclusive
+make({ service: A, name: "a", layer: aLayer, deps: [] })
+
+// @ts-expect-error B requires A
+make({ service: B, layer: bLayer, deps: [] })
+
+// @ts-expect-error C requires A and B
+make({ service: C, layer: cLayer, deps: [a] })
+
+const closed = build(LayerNode.group([c]))
+const closedWithError = build(LayerNode.group([dependent]))
+const checkClosed: Layer.Layer<C, never, never> = closed
+const checkError: Layer.Layer<B, LayerError, never> = closedWithError
+void checkClosed
+void checkError
+
+LayerNode.replace(aLayer, Layer.succeed(A, A.of({})))
+
+// @ts-expect-error Replacement must provide A
+LayerNode.replace(aLayer, Layer.succeed(B, B.of({})))
+
+// @ts-expect-error Replacement cannot introduce a new error
+LayerNode.replace(aLayer, Layer.effect(A, Effect.fail(new OtherError())))
+
+// @ts-expect-error Replacement must be closed
+LayerNode.replace(bLayer, bLayer)
+
+class TagA extends Context.Service<TagA, {}>()("test/TagA") {}
+class TagB extends Context.Service<TagB, {}>()("test/TagB") {}
+class TagC extends Context.Service<TagC, {}>()("test/TagC") {}
+
+const scopedTags = LayerNode.tags({ request: ["global"], global: [] })
+const request = scopedTags.make("request")
+const global = scopedTags.make("global")
+const globalA = global({ service: TagA, layer: Layer.succeed(TagA, TagA.of({})), deps: [] })
+const requestA = request({ service: TagA, layer: Layer.succeed(TagA, TagA.of({})), deps: [] })
+const requestB = request({ service: TagB, layer: Layer.succeed(TagB, TagB.of({})), deps: [] })
+const tagBLayer = Layer.effect(TagB, Effect.as(TagA, TagB.of({})))
+const tagCLayer = Layer.effect(
+  TagC,
+  Effect.gen(function* () {
+    yield* TagA
+    yield* TagB
+    return TagC.of({})
+  }),
+)
+
+request({ service: TagB, layer: tagBLayer, deps: [globalA] })
+request({ service: TagC, layer: tagCLayer, deps: [globalA, requestB] })
+request({ service: TagC, layer: tagCLayer, deps: [LayerNode.group([globalA, requestB])] })
+
+// @ts-expect-error Tag configuration can only reference declared tags
+LayerNode.tags({ request: ["missing"], global: [] })
+
+// @ts-expect-error An unrelated dependency cannot satisfy TagA
+request({ service: TagB, layer: tagBLayer, deps: [requestB] })
+
+// @ts-expect-error Providing only TagA leaves TagB missing
+request({ service: TagC, layer: tagCLayer, deps: [globalA] })
+
+// @ts-expect-error Providing only TagB leaves TagA missing
+request({ service: TagC, layer: tagCLayer, deps: [requestB] })
+
+// @ts-expect-error Duplicate TagA providers still leave TagB missing
+request({ service: TagC, layer: tagCLayer, deps: [globalA, requestA] })
+
+// @ts-expect-error A group with only TagA still leaves TagB missing
+request({ service: TagC, layer: tagCLayer, deps: [LayerNode.group([globalA])] })
+
+// @ts-expect-error Global cannot depend on request
+global({ service: TagB, layer: tagBLayer, deps: [requestA] })
+
+// @ts-expect-error Groups preserve their child tags
+global({ service: TagB, layer: tagBLayer, deps: [LayerNode.group([requestA])] })
+
+class ScopedA extends Context.Service<ScopedA, {}>()("test/ScopedA") {}
+class ScopedB extends Context.Service<ScopedB, {}>()("test/ScopedB") {}
+
+const scopedA = Layer.succeed(ScopedA, ScopedA.of({}))
+const scopedB = Layer.effect(ScopedB, Effect.as(ScopedA, ScopedB.of({})))
+const globalScopedA = makeGlobalNode({ service: ScopedA, layer: scopedA, deps: [] })
+const locationScopedA = makeLocationNode({ service: ScopedA, layer: scopedA, deps: [] })
+
+makeGlobalNode({ service: ScopedB, layer: scopedB, deps: [globalScopedA] })
+makeLocationNode({ service: ScopedB, layer: scopedB, deps: [globalScopedA] })
+makeLocationNode({ service: ScopedB, layer: scopedB, deps: [locationScopedA] })
+
+// @ts-expect-error Global nodes cannot depend on location nodes
+makeGlobalNode({ service: ScopedB, layer: scopedB, deps: [locationScopedA] })
+
+// @ts-expect-error ScopedB requires ScopedA
+makeLocationNode({ service: ScopedB, layer: scopedB, deps: [] })
+
+test("type exploration compiles", () => {})

packages/core/test/effect/layer-node/layer-node.test.ts

@@ -0,0 +1,222 @@
+import { describe, expect, test } from "bun:test"
+import { Context, Effect, Layer } from "effect"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
+
+class Value extends Context.Service<Value, { readonly value: string }>()("test/LayerNodeValue") {}
+class Greeting extends Context.Service<Greeting, { readonly value: string }>()("test/LayerNodeGreeting") {}
+class Left extends Context.Service<Left, { readonly value: string }>()("test/LayerNodeLeft") {}
+class Right extends Context.Service<Right, { readonly value: string }>()("test/LayerNodeRight") {}
+class Database extends Context.Service<Database, { readonly name: string }>()("test/GraphDatabase") {}
+class Users extends Context.Service<Users, { readonly list: Effect.Effect<string[]> }>()("test/GraphUsers") {}
+class App extends Context.Service<App, { readonly run: Effect.Effect<string[]> }>()("test/GraphApp") {}
+
+const tags = LayerNode.tags({ app: [] })
+const make = tags.make("app")
+const build = <A, E>(root: LayerNode.Node<A, E, any>, replacements?: readonly LayerNode.Replacement[]) =>
+  LayerNode.compile(root, new Map(replacements?.map((item) => [item.source, item.replacement]))) as Layer.Layer<A, E>
+const valueLayer = Layer.succeed(Value, Value.of({ value: "production" }))
+const greetingLayer = Layer.effect(
+  Greeting,
+  Effect.map(Value, (value) => Greeting.of({ value: `hello ${value.value}` })),
+)
+const value = make({ service: Value, layer: valueLayer, deps: [] })
+const greeting = make({ service: Greeting, layer: greetingLayer, deps: [value] })
+
+describe("layer node", () => {
+  test("builds an untagged graph", async () => {
+    const value = LayerNode.make({ service: Value, layer: valueLayer, deps: [] })
+    const greeting = LayerNode.make({ service: Greeting, layer: greetingLayer, deps: [value] })
+    const program = Effect.map(Greeting, (item) => item.value).pipe(
+      Effect.provide(LayerNode.compile(LayerNode.group([greeting]))),
+    )
+    expect(await Effect.runPromise(program)).toBe("hello production")
+  })
+
+  test("builds a dependency graph", async () => {
+    const program = Effect.map(Greeting, (item) => item.value).pipe(Effect.provide(build(LayerNode.group([greeting]))))
+    expect(await Effect.runPromise(program)).toBe("hello production")
+  })
+
+  test("exposes roots but hides transitive dependencies", () => {
+    const layer = build(LayerNode.group([greeting]))
+    const check: Layer.Layer<Greeting> = layer
+    void check
+  })
+
+  test("preserves branch-specific implementations across roots", async () => {
+    const firstValue = make({ service: Value, layer: Layer.succeed(Value, Value.of({ value: "first" })), deps: [] })
+    const secondValue = make({ service: Value, layer: Layer.succeed(Value, Value.of({ value: "second" })), deps: [] })
+    const leftLayer = Layer.effect(
+      Left,
+      Effect.map(Value, (item) => Left.of({ value: item.value })),
+    )
+    const rightLayer = Layer.effect(
+      Right,
+      Effect.map(Value, (item) => Right.of({ value: item.value })),
+    )
+    const left = make({ service: Left, layer: leftLayer, deps: [firstValue] })
+    const right = make({ service: Right, layer: rightLayer, deps: [secondValue] })
+    const layer = build(LayerNode.group([left, right]))
+    const program = Effect.gen(function* () {
+      return [(yield* Left).value, (yield* Right).value]
+    }).pipe(Effect.provide(layer))
+    expect(await Effect.runPromise(program)).toEqual(["first", "second"])
+  })
+
+  test("requires unbound nodes to be bound before compilation", async () => {
+    const unbound = LayerNode.unbound(Value, tags.values.app)
+    const greeting = make({ service: Greeting, layer: greetingLayer, deps: [unbound] })
+    const tree = LayerNode.group([greeting])
+    expect(() => LayerNode.compile(tree)).toThrow("Unbound layer node: test/LayerNodeValue")
+    const bound = LayerNode.bind(tree, unbound, value)
+    const layer = LayerNode.compile(bound) as Layer.Layer<Greeting>
+    const program = Effect.map(Greeting, (item) => item.value).pipe(Effect.provide(layer))
+    expect(await Effect.runPromise(program)).toBe("hello production")
+  })
+
+  test("replaces a layer by identity", async () => {
+    const replacement = Layer.succeed(Value, Value.of({ value: "simulation" }))
+    const program = Effect.map(Greeting, (item) => item.value).pipe(
+      Effect.provide(build(LayerNode.group([greeting]), [LayerNode.replace(valueLayer, replacement)])),
+    )
+    expect(await Effect.runPromise(program)).toBe("hello simulation")
+  })
+
+  test("replaces every use of the same layer", async () => {
+    const leftLayer = Layer.effect(
+      Left,
+      Effect.map(Value, (item) => Left.of({ value: item.value })),
+    )
+    const rightLayer = Layer.effect(
+      Right,
+      Effect.map(Value, (item) => Right.of({ value: item.value })),
+    )
+    const left = make({ service: Left, layer: leftLayer, deps: [value] })
+    const right = make({ service: Right, layer: rightLayer, deps: [value] })
+    const replacement = Layer.succeed(Value, Value.of({ value: "replaced" }))
+    const layer = build(LayerNode.group([left, right]), [LayerNode.replace(valueLayer, replacement)])
+    const program = Effect.gen(function* () {
+      return [(yield* Left).value, (yield* Right).value]
+    }).pipe(Effect.provide(layer))
+    expect(await Effect.runPromise(program)).toEqual(["replaced", "replaced"])
+  })
+
+  test("does not acquire an unused replacement", async () => {
+    let acquisitions = 0
+    const other = Layer.succeed(Value, Value.of({ value: "other" }))
+    const replacement = Layer.effect(
+      Value,
+      Effect.sync(() => {
+        acquisitions++
+        return Value.of({ value: "replacement" })
+      }),
+    )
+    await Effect.runPromise(
+      Effect.map(Greeting, (item) => item.value).pipe(
+        Effect.provide(build(LayerNode.group([greeting]), [LayerNode.replace(other, replacement)])),
+      ),
+    )
+    expect(acquisitions).toBe(0)
+  })
+
+  test("hoists and compiles tagged graphs", async () => {
+    const tags = LayerNode.tags({ location: ["global"], global: [] })
+    const global = tags.make("global")
+    const location = tags.make("location")
+    const database = global({
+      service: Database,
+      layer: Layer.succeed(Database, Database.of({ name: "Alice" })),
+      deps: [],
+    })
+    const users = location({
+      service: Users,
+      layer: Layer.effect(
+        Users,
+        Effect.gen(function* () {
+          const db = yield* Database
+          return Users.of({ list: Effect.succeed([db.name]) })
+        }),
+      ),
+      deps: [database],
+    })
+    const app = location({
+      service: App,
+      layer: Layer.effect(
+        App,
+        Effect.gen(function* () {
+          const service = yield* Users
+          return App.of({ run: service.list })
+        }),
+      ),
+      deps: [users],
+    })
+
+    const result = LayerNode.hoist(LayerNode.group([app]), tags.values.global)
+    expect(result.node.dependencies[0]?.dependencies[0]?.dependencies[0]).toMatchObject({
+      kind: "group",
+      dependencies: [],
+    })
+    expect(result.hoisted.dependencies).toEqual([database])
+
+    const layer = LayerNode.compile(result.node).pipe(
+      Layer.provide(LayerNode.compile(result.hoisted)),
+    ) as unknown as Layer.Layer<App>
+    const program = Effect.gen(function* () {
+      return yield* (yield* App).run
+    }).pipe(Effect.provide(layer))
+
+    expect(await Effect.runPromise(program)).toEqual(["Alice"])
+  })
+
+  test("rejects conflicting hoisted implementations", () => {
+    const tags = LayerNode.tags({ location: ["global"], global: [] })
+    const global = tags.make("global")
+    const location = tags.make("location")
+    const first = global({
+      service: Database,
+      layer: Layer.succeed(Database, Database.of({ name: "first" })),
+      deps: [],
+    })
+    const second = global({
+      service: Database,
+      layer: Layer.succeed(Database, Database.of({ name: "second" })),
+      deps: [],
+    })
+    const left = location({
+      service: Users,
+      layer: Layer.effect(Users, Effect.as(Database, Users.of({ list: Effect.succeed([]) }))),
+      deps: [first],
+    })
+    const right = location({
+      service: App,
+      layer: Layer.effect(App, Effect.as(Database, App.of({ run: Effect.succeed([]) }))),
+      deps: [second],
+    })
+
+    expect(() => LayerNode.hoist(LayerNode.group([left, right]), tags.values.global)).toThrow(
+      "Tag global has conflicting implementations for test/GraphDatabase",
+    )
+  })
+
+  test("treats dependency groups as transparent while hoisting", () => {
+    const tags = LayerNode.tags({ location: ["global"], global: [] })
+    const global = tags.make("global")
+    const location = tags.make("location")
+    const database = global({
+      service: Database,
+      layer: Layer.succeed(Database, Database.of({ name: "Alice" })),
+      deps: [],
+    })
+    const users = location({
+      service: Users,
+      layer: Layer.effect(Users, Effect.as(Database, Users.of({ list: Effect.succeed([]) }))),
+      deps: [LayerNode.group([database])],
+    })
+    const result = LayerNode.hoist(LayerNode.group([users]), tags.values.global)
+
+    expect(result.node.dependencies[0]?.dependencies[0]?.dependencies[0]).toMatchObject({
+      kind: "group",
+      dependencies: [],
+    })
+  })
+})

packages/core/test/effect/layer-node/node-build.test.ts

@@ -0,0 +1,123 @@
+import { describe, expect, test } from "bun:test"
+import { Context, Effect, Layer, LayerMap, Option } from "effect"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
+import { Node } from "@opencode-ai/core/effect/app-node"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
+import { Location } from "@opencode-ai/core/location"
+import { LocationServiceMap } from "@opencode-ai/core/location-service-map"
+import type { LocationError, LocationServices } from "@opencode-ai/core/location-services"
+import { Project } from "@opencode-ai/core/project"
+import { AbsolutePath } from "@opencode-ai/core/schema"
+import { tmpdir } from "../../fixture/tmpdir"
+
+class Value extends Context.Service<Value, { readonly value: string }>()("test/TagValue") {}
+class Result extends Context.Service<Result, { readonly value: string }>()("test/TagResult") {}
+class CycleA extends Context.Service<CycleA, {}>()("test/NodeBuildA") {}
+class CycleB extends Context.Service<CycleB, { readonly directory: AbsolutePath }>()("test/NodeBuildB") {}
+
+describe("node build", () => {
+  test("does not build a location service map when the graph does not require it", async () => {
+    const result = Node.makeGlobalNode({
+      service: Result,
+      layer: Layer.succeed(Result, Result.of({ value: "plain" })),
+      deps: [],
+    })
+    const layer = AppNodeBuilder.build(result)
+    const program = Effect.gen(function* () {
+      expect(Option.isNone(yield* Effect.serviceOption(LocationServiceMap.Service))).toBe(true)
+      return (yield* Result).value
+    }).pipe(Effect.provide(layer))
+
+    expect(await Effect.runPromise(program)).toBe("plain")
+  })
+
+  test("detects cycles through a bound location service map", () => {
+    const a = Node.makeGlobalNode({
+      service: CycleA,
+      layer: Layer.effect(CycleA, Effect.as(LocationServiceMap.Service, CycleA.of({}))),
+      deps: [LocationServiceMap.node],
+    })
+    const b = Node.makeGlobalNode({
+      service: CycleB,
+      layer: Layer.effect(
+        CycleB,
+        Effect.map(CycleA, () => CycleB.of({ directory: AbsolutePath.make(process.cwd()) })),
+      ),
+      deps: [a],
+    })
+    const mapEffect = Effect.gen(function* () {
+      const service = yield* CycleB
+      return yield* LayerMap.make(
+        (ref: Location.Ref) =>
+          Layer.succeed(
+            Location.Service,
+            Location.Service.of({
+              directory: ref.directory,
+              workspaceID: ref.workspaceID,
+              project: { id: Project.ID.global, directory: service.directory },
+            }),
+          ),
+        { idleTimeToLive: "1 minute" },
+      )
+    }) as unknown as Effect.Effect<LayerMap.LayerMap<Location.Ref, LocationServices, LocationError>, never, CycleB>
+    const mapLayer = Layer.effect(LocationServiceMap.Service, mapEffect)
+    const map = Node.makeGlobalNode({ service: LocationServiceMap.Service, layer: mapLayer, deps: [b] })
+    const graph = LayerNode.bind(LayerNode.group([a]), LocationServiceMap.node, map)
+
+    expect(() => AppNodeBuilder.build(graph)).toThrow("Cycle detected in layer tree")
+  })
+
+  test("shares top-level project with location services", async () => {
+    await using tmp = await tmpdir()
+    let acquisitions = 0
+    const projectLayer = Layer.effect(
+      Project.Service,
+      Effect.sync(() => {
+        acquisitions++
+        return Project.Service.of({
+          directories: () => Effect.succeed([]),
+          resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
+          commit: () => Effect.void,
+        })
+      }),
+    )
+    const layer = AppNodeBuilder.build(LayerNode.group([Project.node, LocationServiceMap.node]), [
+      LayerNode.replace(Project.layer, projectLayer),
+    ])
+    const ref = Location.Ref.make({ directory: AbsolutePath.make(tmp.path) })
+    const program = Effect.gen(function* () {
+      yield* Project.Service
+      const locations = yield* LocationServiceMap.Service
+      expect(Option.isSome(yield* Effect.serviceOption(LocationServiceMap.Service))).toBe(true)
+      return yield* Location.Service.pipe(Effect.provide(locations.get(ref)))
+    }).pipe(Effect.provide(layer))
+
+    expect((await Effect.runPromise(program)).directory).toBe(ref.directory)
+    expect(acquisitions).toBe(1)
+  })
+
+  test("returns a composed application layer", async () => {
+    const value = Node.makeGlobalNode({
+      service: Value,
+      layer: Layer.succeed(Value, Value.of({ value: "value" })),
+      deps: [],
+    })
+    const result = Node.makeGlobalNode({
+      service: Result,
+      layer: Layer.effect(
+        Result,
+        Effect.gen(function* () {
+          return Result.of({ value: (yield* Value).value })
+        }),
+      ),
+      deps: [value],
+    })
+    const serviceLayer = AppNodeBuilder.build(result)
+    const program = Effect.gen(function* () {
+      expect(Option.isNone(yield* Effect.serviceOption(LocationServiceMap.Service))).toBe(true)
+      return (yield* Result).value
+    }).pipe(Effect.provide(serviceLayer))
+
+    expect(await Effect.runPromise(program)).toBe("value")
+  })
+})

packages/core/test/event.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect } from "bun:test"
-import { Cause, DateTime, Deferred, Effect, Exit, Fiber, Layer, Schema, Stream } from "effect"
+import { Cause, DateTime, Deferred, Effect, Exit, Fiber, Layer, Option, Schema, Stream } from "effect"
 import { EventV2 } from "@opencode-ai/core/event"
 import { Event } from "@opencode-ai/schema/event"
 import { Session } from "@opencode-ai/schema/session"
@@ -285,6 +285,69 @@ describe("EventV2", () => {
     }),
   )
 
+  it.effect("notifies global listeners only after a durable event is committed", () =>
+    Effect.gen(function* () {
+      const events = yield* EventV2.Service
+      const { db } = yield* Database.Service
+      const aggregateID = EventV2.ID.create()
+      const observed = new Array<{ id: string; seq: number }>()
+      yield* events.listen((event) =>
+        event.type !== SyncMessage.type
+          ? Effect.void
+          : db
+              .select({ id: EventTable.id, seq: EventTable.seq })
+              .from(EventTable)
+              .where(eq(EventTable.id, event.id))
+              .get()
+              .pipe(
+                Effect.orDie,
+                Effect.tap((row) =>
+                  Effect.sync(() => {
+                    if (row) observed.push(row)
+                  }),
+                ),
+                Effect.asVoid,
+              ),
+      )
+
+      const event = yield* events.publish(SyncMessage, { id: aggregateID, text: "committed" })
+      if (!event.durable) throw new Error("Expected durable event metadata")
+
+      expect(observed).toEqual([{ id: event.id, seq: event.durable.seq }])
+    }),
+  )
+
+  it.effect("ends only an overflowing bounded subscriber without blocking other listeners", () =>
+    Effect.gen(function* () {
+      const events = yield* EventV2.Service
+      const consuming = yield* Deferred.make<void>()
+      const release = yield* Deferred.make<void>()
+      const slowStream = yield* EventV2.allBounded(events, 1)
+      const fastStream = yield* EventV2.allBounded(events, 8)
+      const slow = yield* slowStream.pipe(
+        Stream.runForEach(() => Deferred.succeed(consuming, undefined).pipe(Effect.andThen(Deferred.await(release)))),
+        Effect.forkScoped,
+      )
+      const fast = yield* fastStream.pipe(Stream.take(4), Stream.runCollect, Effect.forkScoped)
+
+      yield* events.publish(Message, { text: "one" })
+      yield* Deferred.await(consuming)
+      yield* events.publish(Message, { text: "two" })
+      yield* events.publish(Message, { text: "overflow" })
+      const last = yield* events.publish(Message, { text: "still delivered" })
+      yield* Deferred.succeed(release, undefined)
+
+      const slowExit = yield* Fiber.await(slow)
+      expect(Exit.findErrorOption(slowExit).pipe(Option.getOrUndefined)).toBeInstanceOf(EventV2.SubscriberOverflowError)
+      expect(Array.from(yield* Fiber.join(fast))).toEqual([
+        expect.objectContaining({ data: { text: "one" } }),
+        expect.objectContaining({ data: { text: "two" } }),
+        expect.objectContaining({ data: { text: "overflow" } }),
+        last,
+      ])
+    }),
+  )
+
   it.effect("preserves observer interruption", () =>
     Effect.gen(function* () {
       const events = yield* EventV2.Service

packages/core/test/filesystem/search.test.ts

@@ -2,12 +2,13 @@ import { describe, expect } from "bun:test"
 import fs from "fs/promises"
 import path from "path"
 import { Effect } from "effect"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { Ripgrep } from "@opencode-ai/core/ripgrep"
 import { AbsolutePath, RelativePath } from "@opencode-ai/core/schema"
 import { tmpdir } from "../fixture/tmpdir"
 import { testEffect } from "../lib/effect"
 
-const it = testEffect(Ripgrep.defaultLayer)
+const it = testEffect(LayerNode.compile(Ripgrep.node))
 
 const withTmp = <A, E, R>(f: (directory: AbsolutePath) => Effect.Effect<A, E, R>) =>
   Effect.acquireRelease(

packages/core/test/git.test.ts

@@ -3,13 +3,14 @@ import { $ } from "bun"
 import fs from "fs/promises"
 import path from "path"
 import { Effect } from "effect"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { Git } from "@opencode-ai/core/git"
 import { AbsolutePath, RelativePath } from "@opencode-ai/core/schema"
 import { branch, commit, gitRemote } from "./fixture/git"
 import { tmpdir } from "./fixture/tmpdir"
 import { testEffect } from "./lib/effect"
 
-const it = testEffect(Git.defaultLayer)
+const it = testEffect(LayerNode.compile(Git.node))
 
 describe("Git", () => {
   it.live("clones a remote and reads checkout metadata", () =>

packages/core/test/integration.test.ts

@@ -1,14 +1,14 @@
 import { describe, expect } from "bun:test"
-import { Duration, Effect, Exit, Fiber, Layer, Scope, Stream } from "effect"
+import { Duration, Effect, Exit, Fiber, Scope, Stream } from "effect"
 import * as TestClock from "effect/testing/TestClock"
-import { Integration } from "@opencode-ai/core/integration"
 import { Credential } from "@opencode-ai/core/credential"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { EventV2 } from "@opencode-ai/core/event"
+import { Integration } from "@opencode-ai/core/integration"
 import { testEffect } from "./lib/effect"
 
-const it = testEffect(
-  Integration.locationLayer.pipe(Layer.provideMerge(Credential.defaultLayer), Layer.provideMerge(EventV2.defaultLayer)),
-)
+const it = testEffect(AppNodeBuilder.build(LayerNode.group([Integration.node, Credential.node, EventV2.node])))
 
 describe("Integration", () => {
   it.effect("registers integrations through the editor", () =>

packages/core/test/location-filesystem.test.ts

@@ -2,10 +2,10 @@ import fs from "fs/promises"
 import path from "path"
 import { describe, expect } from "bun:test"
 import { Effect, Exit, Layer } from "effect"
+import { makeLocationNode } from "@opencode-ai/core/effect/app-node"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { FileSystem } from "@opencode-ai/core/filesystem"
-import { FSUtil } from "@opencode-ai/core/fs-util"
 import { Location } from "@opencode-ai/core/location"
-import { Ripgrep } from "@opencode-ai/core/ripgrep"
 import { AbsolutePath, RelativePath } from "@opencode-ai/core/schema"
 import { location } from "./fixture/location"
 import { tmpdir } from "./fixture/tmpdir"
@@ -13,13 +13,18 @@ import { it } from "./lib/effect"
 
 const provide = (directory: string) =>
   Effect.provide(
-    FileSystem.layer.pipe(
-      Layer.provide(
-        Layer.mergeAll(
-          FSUtil.defaultLayer,
-          Ripgrep.defaultLayer,
-          Layer.succeed(Location.Service, Location.Service.of(location({ directory: AbsolutePath.make(directory) }))),
-        ),
+    LayerNode.compile(
+      LayerNode.bind(
+        FileSystem.node,
+        Location.node,
+        makeLocationNode({
+          service: Location.Service,
+          layer: Layer.succeed(
+            Location.Service,
+            Location.Service.of(location({ directory: AbsolutePath.make(directory) })),
+          ),
+          deps: [],
+        }),
       ),
     ),
   )

packages/core/test/location-layer.test.ts

@@ -6,7 +6,7 @@ import { Tool } from "@opencode-ai/core/tool/tool"
 import { define } from "@opencode-ai/plugin/v2/effect"
 import { AgentV2 } from "@opencode-ai/core/agent"
 import { Catalog } from "@opencode-ai/core/catalog"
-import { LocationServiceMap } from "@opencode-ai/core/location-layer"
+import { LocationServiceMap, locationServiceMapLayer } from "@opencode-ai/core/location-services"
 import { Location } from "@opencode-ai/core/location"
 import { PluginV2 } from "@opencode-ai/core/plugin"
 import { ModelV2 } from "@opencode-ai/core/model"
@@ -34,7 +34,7 @@ const applicationTools = ApplicationTools.layer
 const it = testEffect(
   Layer.merge(
     Layer.mergeAll(applicationTools, Database.defaultLayer, EventV2.defaultLayer),
-    LocationServiceMap.layer.pipe(
+    locationServiceMapLayer.pipe(
       Layer.provide(applicationTools),
       Layer.provide(
         Layer.mergeAll(
@@ -60,7 +60,7 @@ describe("LocationServiceMap", () => {
       Effect.flatMap((dir) =>
         Effect.scoped(
           Effect.gen(function* () {
-            const locations = yield* LocationServiceMap
+            const locations = yield* LocationServiceMap.Service
             const directory = AbsolutePath.make(dir.path)
             const constructed = Location.Ref.make({ directory })
             const decoded = Schema.decodeUnknownSync(Location.Ref)({ directory })
@@ -111,7 +111,9 @@ describe("LocationServiceMap", () => {
               }
             }).pipe(
               Effect.scoped,
-              Effect.provide(LocationServiceMap.get(Location.Ref.make({ directory: AbsolutePath.make(directory) }))),
+              Effect.provide(
+                LocationServiceMap.Service.get(Location.Ref.make({ directory: AbsolutePath.make(directory) })),
+              ),
             )
 
           const blockedState = yield* update(blocked.path)
@@ -191,7 +193,7 @@ describe("LocationServiceMap", () => {
                 location,
               }),
             ),
-          ).pipe(Effect.provide(LocationServiceMap.get(location)), Effect.flip)
+          ).pipe(Effect.provide(LocationServiceMap.Service.get(location)), Effect.flip)
 
           expect(failure).toMatchObject({
             _tag: "SessionRunnerModel.ModelUnavailableError",
@@ -231,7 +233,7 @@ describe("LocationServiceMap", () => {
           })
         }).pipe(
           Effect.scoped,
-          Effect.provide(LocationServiceMap.get(Location.Ref.make({ directory: AbsolutePath.make(dir.path) }))),
+          Effect.provide(LocationServiceMap.Service.get(Location.Ref.make({ directory: AbsolutePath.make(dir.path) }))),
         ),
       ),
     ),

packages/core/test/location-mutation.test.ts

@@ -2,7 +2,8 @@ import fs from "fs/promises"
 import path from "path"
 import { describe, expect, test } from "bun:test"
 import { Effect, Layer, Schema } from "effect"
-import { FSUtil } from "@opencode-ai/core/fs-util"
+import { makeLocationNode } from "@opencode-ai/core/effect/app-node"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { Location } from "@opencode-ai/core/location"
 import { LocationMutation } from "@opencode-ai/core/location-mutation"
 import { AbsolutePath } from "@opencode-ai/core/schema"
@@ -12,12 +13,18 @@ import { it } from "./lib/effect"
 
 function provide(directory: string) {
   return Effect.provide(
-    LocationMutation.layer.pipe(
-      Layer.provide(
-        Layer.mergeAll(
-          FSUtil.defaultLayer,
-          Layer.succeed(Location.Service, Location.Service.of(location({ directory: AbsolutePath.make(directory) }))),
-        ),
+    LayerNode.compile(
+      LayerNode.bind(
+        LocationMutation.node,
+        Location.node,
+        makeLocationNode({
+          service: Location.Service,
+          layer: Layer.succeed(
+            Location.Service,
+            Location.Service.of(location({ directory: AbsolutePath.make(directory) })),
+          ),
+          deps: [],
+        }),
       ),
     ),
   )

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

@@ -14,7 +14,7 @@ import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { ProjectDirectories } from "@opencode-ai/core/project/directories"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { SessionV2 } from "@opencode-ai/core/session"
-import { LocationServiceMap } from "@opencode-ai/core/location-layer"
+import { locationServiceMapLayer } from "@opencode-ai/core/location-services"
 import { SessionExecution } from "@opencode-ai/core/session/execution"
 import { SessionProjector } from "@opencode-ai/core/session/projector"
 import { SessionTable } from "@opencode-ai/core/session/sql"
@@ -29,7 +29,7 @@ const project = Project.layer.pipe(
   Layer.provide(ProjectDirectories.defaultLayer),
 )
 const sessions = SessionV2.layer.pipe(
-  Layer.provide(LocationServiceMap.layer),
+  Layer.provide(locationServiceMapLayer),
   Layer.provide(Database.defaultLayer),
   Layer.provide(EventV2.defaultLayer),
   Layer.provide(project),

packages/core/test/permission.test.ts

@@ -11,7 +11,7 @@ import { Project } from "@opencode-ai/core/project"
 import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { SessionV2 } from "@opencode-ai/core/session"
-import { LocationServiceMap } from "@opencode-ai/core/location-layer"
+import { locationServiceMapLayer } from "@opencode-ai/core/location-services"
 import { SessionTable } from "@opencode-ai/core/session/sql"
 import { SessionExecution } from "@opencode-ai/core/session/execution"
 import { SessionStore } from "@opencode-ai/core/session/store"
@@ -24,7 +24,7 @@ const current = Layer.succeed(
   Location.Service.of(location({ directory: AbsolutePath.make("/project") })),
 )
 const sessions = SessionV2.layer.pipe(
-  Layer.provide(LocationServiceMap.layer),
+  Layer.provide(locationServiceMapLayer),
   Layer.provide(EventV2.defaultLayer),
   Layer.provide(Database.defaultLayer),
   Layer.provide(SessionStore.defaultLayer),

packages/core/test/plugin/skill.test.ts

@@ -1,20 +1,12 @@
 import { describe, expect } from "bun:test"
-import { Effect, Layer } from "effect"
-import { AgentV2 } from "@opencode-ai/core/agent"
-import { FSUtil } from "@opencode-ai/core/fs-util"
+import { Effect } from "effect"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { SkillPlugin } from "@opencode-ai/core/plugin/skill"
 import { SkillV2 } from "@opencode-ai/core/skill"
-import { SkillDiscovery } from "@opencode-ai/core/skill/discovery"
 import { testEffect } from "../lib/effect"
 import { host } from "./host"
 
-const it = testEffect(
-  SkillV2.layer.pipe(
-    Layer.provide(FSUtil.defaultLayer),
-    Layer.provide(SkillDiscovery.defaultLayer),
-    Layer.provideMerge(AgentV2.locationLayer),
-  ),
-)
+const it = testEffect(AppNodeBuilder.build(SkillV2.node))
 
 describe("SkillPlugin.Plugin", () => {
   it.effect("registers the built-in customize-opencode skill", () =>

packages/core/test/process/process.test.ts

@@ -5,10 +5,11 @@ import { tmpdir } from "node:os"
 import path from "node:path"
 import { Effect, Exit, Fiber, Stream } from "effect"
 import { ChildProcess } from "effect/unstable/process"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { AppProcess } from "@opencode-ai/core/process"
 import { testEffect } from "../lib/effect"
 
-const it = testEffect(AppProcess.defaultLayer)
+const it = testEffect(LayerNode.compile(AppProcess.node))
 
 const NODE = process.execPath
 const cmd = (...args: string[]) => ChildProcess.make(NODE, args)

packages/core/test/project-directories.test.ts

@@ -1,14 +1,15 @@
 import { describe, expect } from "bun:test"
-import { Effect, Layer, Schema } from "effect"
+import { Effect, Schema } from "effect"
 import { Database } from "@opencode-ai/core/database/database"
-import { EventV2 } from "@opencode-ai/core/event"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { Project } from "@opencode-ai/core/project"
 import { ProjectDirectories } from "@opencode-ai/core/project/directories"
 import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { testEffect } from "./lib/effect"
 
-const it = testEffect(Layer.mergeAll(Database.defaultLayer, EventV2.defaultLayer, ProjectDirectories.defaultLayer))
+const it = testEffect(AppNodeBuilder.build(LayerNode.group([Database.node, ProjectDirectories.node])))
 
 const projectID = Project.ID.make("project-directories")
 const directory = AbsolutePath.make("/tmp/project-directories")

packages/core/test/project.test.ts

@@ -2,18 +2,15 @@ import { describe, expect } from "bun:test"
 import { $ } from "bun"
 import fs from "fs/promises"
 import path from "path"
-import { Effect, Layer, Schema } from "effect"
+import { Effect, Schema } from "effect"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { ProjectV2 } from "@opencode-ai/core/project"
-import { Database } from "@opencode-ai/core/database/database"
-import { FSUtil } from "@opencode-ai/core/fs-util"
-import { Git } from "@opencode-ai/core/git"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { Hash } from "@opencode-ai/core/util/hash"
-import { ProjectDirectories } from "@opencode-ai/core/project/directories"
 import { tmpdir } from "./fixture/tmpdir"
 import { testEffect } from "./lib/effect"
 
-const it = testEffect(Layer.mergeAll(ProjectV2.defaultLayer, Database.defaultLayer, ProjectDirectories.defaultLayer))
+const it = testEffect(AppNodeBuilder.build(ProjectV2.node))
 
 function remoteID(remote: string) {
   return ProjectV2.ID.make(Hash.fast(`git-remote:${remote}`))

packages/core/test/question.test.ts

@@ -1,13 +1,14 @@
 import { describe, expect } from "bun:test"
 import { Context, Deferred, Effect, Exit, Fiber, Layer, Scope } from "effect"
-import { Database } from "@opencode-ai/core/database/database"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { EventV2 } from "@opencode-ai/core/event"
 import { QuestionV2 } from "@opencode-ai/core/question"
 import { SessionV2 } from "@opencode-ai/core/session"
 import { testEffect } from "./lib/effect"
 
-const questions = QuestionV2.layer.pipe(Layer.provide(EventV2.defaultLayer))
-const it = testEffect(Layer.mergeAll(Database.defaultLayer, EventV2.defaultLayer, questions))
+const questions = AppNodeBuilder.build(LayerNode.group([EventV2.node, QuestionV2.node]))
+const it = testEffect(questions)
 
 const sessionID = SessionV2.ID.make("ses_question_test")
 const question: QuestionV2.Info = {

packages/core/test/ripgrep.test.ts

@@ -2,12 +2,13 @@ import { describe, expect } from "bun:test"
 import fs from "fs/promises"
 import path from "path"
 import { Effect } from "effect"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { Ripgrep } from "@opencode-ai/core/ripgrep"
 import { RelativePath } from "@opencode-ai/core/schema"
 import { tmpdir } from "./fixture/tmpdir"
 import { testEffect } from "./lib/effect"
 
-const it = testEffect(Ripgrep.defaultLayer)
+const it = testEffect(LayerNode.compile(Ripgrep.node))
 
 describe("Ripgrep", () => {
   it.live("keeps ignored files out of catch-all find results", () =>

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

@@ -13,7 +13,7 @@ import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { ProviderV2 } from "@opencode-ai/core/provider"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { SessionV2 } from "@opencode-ai/core/session"
-import { LocationServiceMap } from "@opencode-ai/core/location-layer"
+import { locationServiceMapLayer } from "@opencode-ai/core/location-services"
 import { SessionV1 } from "@opencode-ai/core/v1/session"
 import { Prompt } from "@opencode-ai/core/session/prompt"
 import { SessionProjector } from "@opencode-ai/core/session/projector"
@@ -35,7 +35,7 @@ const projects = Layer.succeed(
   }),
 )
 const sessions = SessionV2.layer.pipe(
-  Layer.provide(LocationServiceMap.layer),
+  Layer.provide(locationServiceMapLayer),
   Layer.provide(EventV2.defaultLayer),
   Layer.provide(Database.defaultLayer),
   Layer.provide(SessionStore.defaultLayer),

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

@@ -0,0 +1,174 @@
+import { describe, expect } from "bun:test"
+import { Effect, Layer, Schema } from "effect"
+import { Database } from "@opencode-ai/core/database/database"
+import { EventV2 } from "@opencode-ai/core/event"
+import { Location } from "@opencode-ai/core/location"
+import { locationServiceMapLayer } from "@opencode-ai/core/location-services"
+import { ProjectV2 } from "@opencode-ai/core/project"
+import { ProjectTable } from "@opencode-ai/core/project/sql"
+import { AbsolutePath } from "@opencode-ai/core/schema"
+import { SessionV2 } from "@opencode-ai/core/session"
+import { SessionExecution } from "@opencode-ai/core/session/execution"
+import { SessionProjector } from "@opencode-ai/core/session/projector"
+import { SessionStore } from "@opencode-ai/core/session/store"
+import { SessionTable } from "@opencode-ai/core/session/sql"
+import { testEffect } from "./lib/effect"
+
+const projects = Layer.succeed(
+  ProjectV2.Service,
+  ProjectV2.Service.of({
+    resolve: (directory) => Effect.succeed({ id: ProjectV2.ID.global, directory }),
+    directories: () => Effect.succeed([]),
+    commit: () => Effect.void,
+  }),
+)
+const sessions = SessionV2.layer.pipe(
+  Layer.provide(locationServiceMapLayer),
+  Layer.provide(EventV2.defaultLayer),
+  Layer.provide(Database.defaultLayer),
+  Layer.provide(SessionStore.defaultLayer),
+  Layer.provide(projects),
+  Layer.provide(SessionExecution.noopLayer),
+)
+const it = testEffect(
+  Layer.mergeAll(
+    Database.defaultLayer,
+    EventV2.defaultLayer,
+    projects,
+    SessionProjector.defaultLayer,
+    SessionStore.defaultLayer,
+    SessionExecution.noopLayer,
+    sessions,
+  ),
+)
+const location = Location.Ref.make({ directory: AbsolutePath.make("/project") })
+
+const GapEvent = EventV2.define({
+  type: "test.session.history.gap",
+  durable: { aggregate: "sessionID", version: 1 },
+  schema: { sessionID: SessionV2.ID, value: Schema.String },
+})
+
+describe("SessionV2.history", () => {
+  it.effect("returns an exhausted page for a migrated Session with no event sequence", () =>
+    Effect.gen(function* () {
+      const db = (yield* Database.Service).db
+      const session = yield* SessionV2.Service
+      const sessionID = SessionV2.ID.make("ses_empty_history")
+      yield* db
+        .insert(ProjectTable)
+        .values({ id: ProjectV2.ID.global, worktree: AbsolutePath.make("/project"), sandboxes: [] })
+        .onConflictDoNothing()
+        .run()
+      yield* db
+        .insert(SessionTable)
+        .values({
+          id: sessionID,
+          project_id: ProjectV2.ID.global,
+          slug: "empty-history",
+          directory: "/project",
+          title: "Empty history",
+          version: "test",
+        })
+        .run()
+
+      const first = yield* session.history({ sessionID, limit: 10 })
+
+      expect(first).toEqual({ events: [], hasMore: false })
+    }),
+  )
+
+  it.effect("treats after as an exclusive aggregate sequence", () =>
+    Effect.gen(function* () {
+      const session = yield* SessionV2.Service
+      const created = yield* session.create({ location })
+      yield* session.switchAgent({ sessionID: created.id, agent: "one" })
+      yield* session.switchAgent({ sessionID: created.id, agent: "two" })
+
+      const page = yield* session.history({ sessionID: created.id, after: 1, limit: 10 })
+
+      expect(page.events.map((event) => event.durable?.seq)).toEqual([2])
+      expect(page.hasMore).toBe(false)
+    }),
+  )
+
+  it.effect("paginates public events in aggregate order across filtered gaps without duplicates", () =>
+    Effect.gen(function* () {
+      const session = yield* SessionV2.Service
+      const events = yield* EventV2.Service
+      const created = yield* session.create({ location })
+      yield* session.switchAgent({ sessionID: created.id, agent: "one" })
+      yield* events.publish(GapEvent, { sessionID: created.id, value: "filtered" })
+      yield* session.switchAgent({ sessionID: created.id, agent: "two" })
+      yield* session.switchAgent({ sessionID: created.id, agent: "three" })
+
+      const first = yield* session.history({ sessionID: created.id, limit: 2 })
+      const after = first.events.at(-1)?.durable?.seq
+      const second = yield* session.history({
+        sessionID: created.id,
+        after,
+        limit: 2,
+      })
+      const sequence = [...first.events, ...second.events].map((event) => event.durable?.seq)
+
+      expect(first.hasMore).toBe(true)
+      expect(second.hasMore).toBe(false)
+      expect(sequence).toEqual([1, 3, 4])
+      expect(new Set(sequence).size).toBe(sequence.length)
+    }),
+  )
+
+  it.effect("includes events committed between pages", () =>
+    Effect.gen(function* () {
+      const session = yield* SessionV2.Service
+      const created = yield* session.create({ location })
+      yield* session.switchAgent({ sessionID: created.id, agent: "one" })
+      yield* session.switchAgent({ sessionID: created.id, agent: "two" })
+
+      const first = yield* session.history({ sessionID: created.id, limit: 1 })
+      yield* session.switchAgent({ sessionID: created.id, agent: "later" })
+      const second = yield* session.history({
+        sessionID: created.id,
+        after: first.events.at(-1)?.durable?.seq,
+        limit: 10,
+      })
+
+      expect(first.hasMore).toBe(true)
+      expect([...first.events, ...second.events].map((event) => event.durable?.seq)).toEqual([1, 2, 3])
+      expect(second.hasMore).toBe(false)
+    }),
+  )
+
+  it.effect("reports exhaustion for exact-limit and limit-plus-one pages", () =>
+    Effect.gen(function* () {
+      const session = yield* SessionV2.Service
+      const created = yield* session.create({ location })
+      yield* session.switchAgent({ sessionID: created.id, agent: "one" })
+      yield* session.switchAgent({ sessionID: created.id, agent: "two" })
+
+      const exact = yield* session.history({ sessionID: created.id, limit: 2 })
+      const oneMore = yield* session.history({ sessionID: created.id, limit: 1 })
+      const exhausted = yield* session.history({
+        sessionID: created.id,
+        after: oneMore.events.at(-1)?.durable?.seq,
+        limit: 1,
+      })
+
+      expect(exact.events).toHaveLength(2)
+      expect(exact.hasMore).toBe(false)
+      expect(oneMore.events).toHaveLength(1)
+      expect(oneMore.hasMore).toBe(true)
+      expect(exhausted.events).toHaveLength(1)
+      expect(exhausted.hasMore).toBe(false)
+    }),
+  )
+
+  it.effect("fails with NotFoundError for a missing Session", () =>
+    Effect.gen(function* () {
+      const session = yield* SessionV2.Service
+      const error = yield* session.history({ sessionID: SessionV2.ID.make("ses_missing"), limit: 10 }).pipe(Effect.flip)
+
+      expect(error._tag).toBe("Session.NotFoundError")
+    }),
+  )
+})

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

@@ -1,7 +1,10 @@
 import { describe, expect } from "bun:test"
-import { DateTime, Effect, Layer, Schema } from "effect"
+import { DateTime, Effect, Schema } from "effect"
 import { asc, eq } from "drizzle-orm"
 import { Database } from "@opencode-ai/core/database/database"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
+import { makeGlobalNode } from "@opencode-ai/core/effect/app-node"
 import { EventV2 } from "@opencode-ai/core/event"
 import { EventTable } from "@opencode-ai/core/event/sql"
 import { ModelV2 } from "@opencode-ai/core/model"
@@ -10,7 +13,6 @@ import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { ProviderV2 } from "@opencode-ai/core/provider"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { SessionV2 } from "@opencode-ai/core/session"
-import { LocationServiceMap } from "@opencode-ai/core/location-layer"
 import { SessionEvent } from "@opencode-ai/core/session/event"
 import { SessionMessage } from "@opencode-ai/core/session/message"
 import { Prompt } from "@opencode-ai/core/session/prompt"
@@ -18,12 +20,18 @@ import { SessionMessageUpdater } from "@opencode-ai/core/session/message-updater
 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 { SessionStore } from "@opencode-ai/core/session/store"
 import { SessionInputTable, SessionMessageTable, SessionTable } from "@opencode-ai/core/session/sql"
 import { testEffect } from "./lib/effect"
 import { Snapshot } from "@opencode-ai/core/snapshot"
 
-const it = testEffect(Layer.mergeAll(Database.defaultLayer, EventV2.defaultLayer, SessionProjector.defaultLayer))
+const it = testEffect(AppNodeBuilder.build(LayerNode.group([Database.node, EventV2.node, SessionProjector.node])))
+const sessionsLayer = AppNodeBuilder.build(
+  LayerNode.bind(
+    SessionV2.node,
+    SessionExecution.node,
+    makeGlobalNode({ service: SessionExecution.Service, layer: SessionExecution.noopLayer, deps: [] }),
+  ),
+)
 const sessionID = SessionV2.ID.make("ses_projector_test")
 const created = DateTime.makeUnsafe(0)
 const model = { id: ModelV2.ID.make("model"), providerID: ProviderV2.ID.make("provider") }
@@ -161,18 +169,7 @@ describe("SessionProjector", () => {
       expect(
         (yield* sessions.context(sessionID)).map((message) => (message.type === "user" ? message.text : message.type)),
       ).toEqual(["first", "second"])
-    }).pipe(
-      Effect.provide(
-        SessionV2.layer.pipe(
-          Layer.provide(LocationServiceMap.layer),
-          Layer.provide(EventV2.defaultLayer),
-          Layer.provide(Database.defaultLayer),
-          Layer.provide(Project.defaultLayer),
-          Layer.provide(SessionStore.defaultLayer),
-          Layer.provide(SessionExecution.noopLayer),
-        ),
-      ),
-    ),
+    }).pipe(Effect.provide(sessionsLayer)),
   )
 
   it.effect("marks an inbox row promoted with the Prompted event sequence", () =>

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

@@ -9,7 +9,7 @@ import { Project } from "@opencode-ai/core/project"
 import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { SessionV2 } from "@opencode-ai/core/session"
-import { LocationServiceMap } from "@opencode-ai/core/location-layer"
+import { locationServiceMapLayer } from "@opencode-ai/core/location-services"
 import { Prompt } from "@opencode-ai/core/session/prompt"
 import { SessionMessage } from "@opencode-ai/core/session/message"
 import { SessionProjector } from "@opencode-ai/core/session/projector"
@@ -42,7 +42,7 @@ const execution = Layer.succeed(
   }),
 )
 const sessions = SessionV2.layer.pipe(
-  Layer.provide(LocationServiceMap.layer),
+  Layer.provide(locationServiceMapLayer),
   Layer.provide(EventV2.defaultLayer),
   Layer.provide(Database.defaultLayer),
   Layer.provide(SessionStore.defaultLayer),

packages/core/test/session-runner-recorded.test.ts

@@ -12,7 +12,7 @@ import { Project } from "@opencode-ai/core/project"
 import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { SessionV2 } from "@opencode-ai/core/session"
-import { LocationServiceMap } from "@opencode-ai/core/location-layer"
+import { locationServiceMapLayer } from "@opencode-ai/core/location-services"
 import { Snapshot } from "@opencode-ai/core/snapshot"
 import { Prompt } from "@opencode-ai/core/session/prompt"
 import { SessionProjector } from "@opencode-ai/core/session/projector"
@@ -103,7 +103,7 @@ const execution = Layer.effect(
   }),
 ).pipe(Layer.provide(runner))
 const sessions = SessionV2.layer.pipe(
-  Layer.provide(LocationServiceMap.layer),
+  Layer.provide(locationServiceMapLayer),
   Layer.provide(EventV2.defaultLayer),
   Layer.provide(Database.defaultLayer),
   Layer.provide(SessionStore.defaultLayer),

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

@@ -19,7 +19,7 @@ import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { QuestionV2 } from "@opencode-ai/core/question"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { SessionV2 } from "@opencode-ai/core/session"
-import { LocationServiceMap } from "@opencode-ai/core/location-layer"
+import { locationServiceMapLayer } from "@opencode-ai/core/location-services"
 import { Snapshot } from "@opencode-ai/core/snapshot"
 import { ContextSnapshotDecodeError } from "@opencode-ai/core/session/error"
 import { SessionEvent } from "@opencode-ai/core/session/event"
@@ -262,7 +262,7 @@ const execution = Layer.effect(
   }),
 ).pipe(Layer.provide(runner))
 const sessions = SessionV2.layer.pipe(
-  Layer.provide(LocationServiceMap.layer),
+  Layer.provide(locationServiceMapLayer),
   Layer.provide(EventV2.defaultLayer),
   Layer.provide(Database.defaultLayer),
   Layer.provide(SessionStore.defaultLayer),

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

@@ -1,7 +1,9 @@
 import { describe, expect } from "bun:test"
 import { asc } from "drizzle-orm"
-import { Effect, Layer } from "effect"
+import { Effect } from "effect"
 import { Database } from "@opencode-ai/core/database/database"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { EventV2 } from "@opencode-ai/core/event"
 import { Project } from "@opencode-ai/core/project"
 import { ProjectTable } from "@opencode-ai/core/project/sql"
@@ -11,7 +13,7 @@ import { SessionTable, TodoTable } from "@opencode-ai/core/session/sql"
 import { SessionTodo } from "@opencode-ai/core/session/todo"
 import { testEffect } from "./lib/effect"
 
-const it = testEffect(Layer.mergeAll(Database.defaultLayer, EventV2.defaultLayer, SessionTodo.defaultLayer))
+const it = testEffect(AppNodeBuilder.build(LayerNode.group([Database.node, EventV2.node, SessionTodo.node])))
 const sessionID = SessionV2.ID.make("ses_todo_test")
 
 const setup = Effect.gen(function* () {

packages/core/test/skill.test.ts

@@ -3,6 +3,8 @@ import path from "path"
 import { describe, expect } from "bun:test"
 import { Effect, Layer } from "effect"
 import { AgentV2 } from "@opencode-ai/core/agent"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { FSUtil } from "@opencode-ai/core/fs-util"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { SkillV2 } from "@opencode-ai/core/skill"
@@ -22,11 +24,9 @@ const discovery = Layer.succeed(
   }),
 )
 const it = testEffect(
-  SkillV2.layer.pipe(
-    Layer.provide(discovery),
-    Layer.provide(FSUtil.defaultLayer),
-    Layer.provideMerge(AgentV2.locationLayer),
-  ),
+  AppNodeBuilder.build(LayerNode.group([SkillV2.node, AgentV2.node]), [
+    LayerNode.replace(SkillDiscovery.layer, discovery),
+  ]),
 )
 
 function write(directory: string, name: string, description: string) {

packages/core/test/system-context/builtins.test.ts

@@ -1,6 +1,9 @@
 import { describe, expect } from "bun:test"
 import { Effect, Layer } from "effect"
 import * as TestClock from "effect/testing/TestClock"
+import { makeLocationNode } from "@opencode-ai/core/effect/app-node"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
+import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { Location } from "@opencode-ai/core/location"
 import { FSUtil } from "@opencode-ai/core/fs-util"
 import { Global } from "@opencode-ai/core/global"
@@ -25,12 +28,14 @@ const locationLayer = Layer.succeed(
     ),
   ),
 )
+const locationNode = makeLocationNode({ service: Location.Service, layer: locationLayer, deps: [] })
+const builtInsNode = LayerNode.bind(
+  LayerNode.group([SystemContextBuiltIns.node, SystemContextRegistry.node]),
+  Location.node,
+  locationNode,
+)
 const it = testEffect(
-  SystemContextBuiltIns.locationLayer.pipe(
-    Layer.provide(FSUtil.defaultLayer),
-    Layer.provide(Global.layerWith({ config: "/global" })),
-    Layer.provide(locationLayer),
-  ),
+  AppNodeBuilder.build(builtInsNode, [LayerNode.replace(Global.layer, Global.layerWith({ config: "/global" }))]),
 )
 const instructionFS = Layer.effect(
   FSUtil.Service,
@@ -43,13 +48,12 @@ const instructionFS = Layer.effect(
       }),
     ),
   ),
-).pipe(Layer.provide(FSUtil.defaultLayer))
+).pipe(Layer.provide(LayerNode.compile(FSUtil.node)))
 const itWithInstructions = testEffect(
-  SystemContextBuiltIns.locationLayer.pipe(
-    Layer.provide(instructionFS),
-    Layer.provide(Global.layerWith({ config: "/global" })),
-    Layer.provide(locationLayer),
-  ),
+  AppNodeBuilder.build(builtInsNode, [
+    LayerNode.replace(FSUtil.layer, instructionFS),
+    LayerNode.replace(Global.layer, Global.layerWith({ config: "/global" })),
+  ]),
 )
 
 describe("SystemContextBuiltIns", () => {