diff --git a/packages/opencode/src/project/vcs.ts b/packages/opencode/src/project/vcs.ts
index 1b1f21f908e2..aede980d6d08 100644
--- a/packages/opencode/src/project/vcs.ts
+++ b/packages/opencode/src/project/vcs.ts
@@ -4,7 +4,6 @@ import path from "path"
 import { Bus } from "@/bus"
 import { BusEvent } from "@/bus/bus-event"
 import { InstanceState } from "@/effect/instance-state"
-import { makeRuntime } from "@/effect/run-service"
 import { AppFileSystem } from "@/filesystem"
 import { FileWatcher } from "@/file/watcher"
 import { Git } from "@/git"
@@ -231,22 +230,4 @@ export namespace Vcs {
     Layer.provide(AppFileSystem.defaultLayer),
     Layer.provide(Bus.layer),
   )
-
-  const { runPromise } = makeRuntime(Service, defaultLayer)
-
-  export async function init() {
-    return runPromise((svc) => svc.init())
-  }
-
-  export async function branch() {
-    return runPromise((svc) => svc.branch())
-  }
-
-  export async function defaultBranch() {
-    return runPromise((svc) => svc.defaultBranch())
-  }
-
-  export async function diff(mode: Mode) {
-    return runPromise((svc) => svc.diff(mode))
-  }
 }
diff --git a/packages/opencode/src/server/instance/index.ts b/packages/opencode/src/server/instance/index.ts
index 2acc424e4ec9..86ff023acf03 100644
--- a/packages/opencode/src/server/instance/index.ts
+++ b/packages/opencode/src/server/instance/index.ts
@@ -1,6 +1,7 @@
 import { describeRoute, resolver, validator } from "hono-openapi"
 import { Hono } from "hono"
 import type { UpgradeWebSocket } from "hono/ws"
+import { Effect } from "effect"
 import z from "zod"
 import { Format } from "../../format"
 import { TuiRoutes } from "./tui"
@@ -119,11 +120,17 @@ export const InstanceRoutes = (upgrade: UpgradeWebSocket): Hono =>
         },
       }),
       async (c) => {
-        const [branch, default_branch] = await Promise.all([Vcs.branch(), Vcs.defaultBranch()])
-        return c.json({
-          branch,
-          default_branch,
-        })
+        return c.json(
+          await AppRuntime.runPromise(
+            Effect.gen(function* () {
+              const vcs = yield* Vcs.Service
+              const [branch, default_branch] = yield* Effect.all([vcs.branch(), vcs.defaultBranch()], {
+                concurrency: 2,
+              })
+              return { branch, default_branch }
+            }),
+          ),
+        )
       },
     )
     .get(
@@ -150,7 +157,14 @@ export const InstanceRoutes = (upgrade: UpgradeWebSocket): Hono =>
         }),
       ),
       async (c) => {
-        return c.json(await Vcs.diff(c.req.valid("query").mode))
+        return c.json(
+          await AppRuntime.runPromise(
+            Effect.gen(function* () {
+              const vcs = yield* Vcs.Service
+              return yield* vcs.diff(c.req.valid("query").mode)
+            }),
+          ),
+        )
       },
     )
     .get(
diff --git a/packages/opencode/test/project/vcs.test.ts b/packages/opencode/test/project/vcs.test.ts
index 1610902af571..5461de5c33c8 100644
--- a/packages/opencode/test/project/vcs.test.ts
+++ b/packages/opencode/test/project/vcs.test.ts
@@ -1,5 +1,6 @@
 import { $ } from "bun"
 import { afterEach, describe, expect, test } from "bun:test"
+import { Effect } from "effect"
 import fs from "fs/promises"
 import path from "path"
 import { tmpdir } from "../fixture/fixture"
@@ -20,8 +21,14 @@ async function withVcs(directory: string, body: () => Promise<void>) {
   return Instance.provide({
     directory,
     fn: async () => {
-      void AppRuntime.runPromise(FileWatcher.Service.use((svc) => svc.init()))
-      Vcs.init()
+      await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const watcher = yield* FileWatcher.Service
+          const vcs = yield* Vcs.Service
+          yield* watcher.init()
+          yield* vcs.init()
+        }),
+      )
       await Bun.sleep(500)
       await body()
     },
@@ -32,7 +39,12 @@ function withVcsOnly(directory: string, body: () => Promise<void>) {
   return Instance.provide({
     directory,
     fn: async () => {
-      Vcs.init()
+      await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          yield* vcs.init()
+        }),
+      )
       await body()
     },
   })
@@ -80,7 +92,12 @@ describeVcs("Vcs", () => {
     await using tmp = await tmpdir({ git: true })
 
     await withVcs(tmp.path, async () => {
-      const branch = await Vcs.branch()
+      const branch = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.branch()
+        }),
+      )
       expect(branch).toBeDefined()
       expect(typeof branch).toBe("string")
     })
@@ -90,7 +107,12 @@ describeVcs("Vcs", () => {
     await using tmp = await tmpdir()
 
     await withVcs(tmp.path, async () => {
-      const branch = await Vcs.branch()
+      const branch = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.branch()
+        }),
+      )
       expect(branch).toBeUndefined()
     })
   })
@@ -123,7 +145,12 @@ describeVcs("Vcs", () => {
       await fs.writeFile(head, `ref: refs/heads/${branch}\n`)
 
       await pending
-      const current = await Vcs.branch()
+      const current = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.branch()
+        }),
+      )
       expect(current).toBe(branch)
     })
   })
@@ -139,7 +166,12 @@ describe("Vcs diff", () => {
     await $`git branch -M main`.cwd(tmp.path).quiet()
 
     await withVcsOnly(tmp.path, async () => {
-      const branch = await Vcs.defaultBranch()
+      const branch = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.defaultBranch()
+        }),
+      )
       expect(branch).toBe("main")
     })
   })
@@ -150,7 +182,12 @@ describe("Vcs diff", () => {
     await $`git config init.defaultBranch trunk`.cwd(tmp.path).quiet()
 
     await withVcsOnly(tmp.path, async () => {
-      const branch = await Vcs.defaultBranch()
+      const branch = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.defaultBranch()
+        }),
+      )
       expect(branch).toBe("trunk")
     })
   })
@@ -163,7 +200,12 @@ describe("Vcs diff", () => {
     await $`git worktree add -b feature/test ${dir} HEAD`.cwd(tmp.path).quiet()
 
     await withVcsOnly(dir, async () => {
-      const [branch, base] = await Promise.all([Vcs.branch(), Vcs.defaultBranch()])
+      const [branch, base] = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* Effect.all([vcs.branch(), vcs.defaultBranch()], { concurrency: 2 })
+        }),
+      )
       expect(branch).toBe("feature/test")
       expect(base).toBe("main")
     })
@@ -177,7 +219,12 @@ describe("Vcs diff", () => {
     await fs.writeFile(path.join(tmp.path, "file.txt"), "changed\n", "utf-8")
 
     await withVcsOnly(tmp.path, async () => {
-      const diff = await Vcs.diff("git")
+      const diff = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.diff("git")
+        }),
+      )
       expect(diff).toEqual(
         expect.arrayContaining([
           expect.objectContaining({
@@ -194,7 +241,12 @@ describe("Vcs diff", () => {
     await fs.writeFile(path.join(tmp.path, weird), "hello\n", "utf-8")
 
     await withVcsOnly(tmp.path, async () => {
-      const diff = await Vcs.diff("git")
+      const diff = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.diff("git")
+        }),
+      )
       expect(diff).toEqual(
         expect.arrayContaining([
           expect.objectContaining({
@@ -215,7 +267,12 @@ describe("Vcs diff", () => {
     await $`git commit --no-gpg-sign -m "branch file"`.cwd(tmp.path).quiet()
 
     await withVcsOnly(tmp.path, async () => {
-      const diff = await Vcs.diff("branch")
+      const diff = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.diff("branch")
+        }),
+      )
       expect(diff).toEqual(
         expect.arrayContaining([
           expect.objectContaining({