Replace Instance.disposeAll/load with fixture helper (#25418)

packages/opencode/test/project/instance.test.ts

@@ -5,13 +5,13 @@ import { InstanceRef } from "../../src/effect/instance-ref"
 import { registerDisposer } from "../../src/effect/instance-registry"
 import { Instance } from "../../src/project/instance"
 import { InstanceStore } from "../../src/project/instance-store"
-import { tmpdirScoped } from "../fixture/fixture"
+import { disposeAllInstances, tmpdirScoped } from "../fixture/fixture"
 import { testEffect } from "../lib/effect"
 
 const it = testEffect(Layer.mergeAll(InstanceStore.defaultLayer, CrossSpawnSpawner.defaultLayer))
 
 afterEach(async () => {
-  await Instance.disposeAll()
+  await disposeAllInstances()
 })
 
 describe("InstanceStore", () => {

packages/opencode/test/project/vcs.test.ts

@@ -3,7 +3,7 @@ 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"
+import { disposeAllInstances, tmpdir } from "../fixture/fixture"
 import { AppRuntime } from "../../src/effect/app-runtime"
 import { FileWatcher } from "../../src/file/watcher"
 import { Instance } from "../../src/project/instance"
@@ -85,7 +85,7 @@ function nextBranchUpdate(directory: string, timeout = 10_000) {
 
 describeVcs("Vcs", () => {
   afterEach(async () => {
-    await Instance.disposeAll()
+    await disposeAllInstances()
   })
 
   test("branch() returns current branch name", async () => {
@@ -158,7 +158,7 @@ describeVcs("Vcs", () => {
 
 describe("Vcs diff", () => {
   afterEach(async () => {
-    await Instance.disposeAll()
+    await disposeAllInstances()
   })
 
   test("defaultBranch() falls back to main", async () => {

packages/opencode/test/project/worktree.test.ts

@@ -6,7 +6,7 @@ import { Cause, Effect, Exit, Layer } from "effect"
 import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
 import { Instance } from "../../src/project/instance"
 import { Worktree } from "../../src/worktree"
-import { provideInstance, provideTmpdirInstance } from "../fixture/fixture"
+import { disposeAllInstances, provideInstance, provideTmpdirInstance } from "../fixture/fixture"
 import { testEffect } from "../lib/effect"
 
 const it = testEffect(Layer.mergeAll(Worktree.defaultLayer, CrossSpawnSpawner.defaultLayer))
@@ -37,7 +37,7 @@ async function waitReady() {
 }
 
 describe("Worktree", () => {
-  afterEach(() => Instance.disposeAll())
+  afterEach(() => disposeAllInstances())
 
   describe("makeWorktreeInfo", () => {
     it.live("returns info with name, branch, and directory", () =>