diff --git a/tests/scripts/build-opencode.test.js b/tests/scripts/build-opencode.test.js
index 8539dd941..66359d4cc 100644
--- a/tests/scripts/build-opencode.test.js
+++ b/tests/scripts/build-opencode.test.js
@@ -12,12 +12,12 @@ const { getNpmPackEntry } = require("../lib/npm-pack-output")
 const { createManifestInstallPlan, applyInstallPlan } = require("../../scripts/lib/install-executor")
 const { withHookConsent } = require("../../scripts/lib/install/hook-consent")
 
-function checkRuntime(runtimeRoot, extension, loader) {
+function checkRuntime(runtimeRoot, extension, loader, installedHome = false) {
   const check = `
     const assert = require("node:assert/strict")
     const path = require("node:path")
     const { pathToFileURL } = require("node:url")
-    const [root, extension] = process.argv.slice(1)
+    const [root, extension, installedHome] = process.argv.slice(1)
     const load = (name) => import(pathToFileURL(path.join(root, name + extension)).href)
 
     async function main() {
@@ -36,7 +36,12 @@ function checkRuntime(runtimeRoot, extension, loader) {
       assert.deepEqual(Object.keys(entry), ["default"])
       assert.equal(entry.default, plugins.default)
       const logs = []
-      const plugin = await entry.default({
+      // Home installs are auto-discovered. Their barrel must stay inert so
+      // the hooks module is initialized exactly once; published package entry
+      // imports continue to expose the actual plugin.
+      const active = installedHome === "true" ? await load("plugins/ecc-hooks") : entry
+      if (installedHome === "true") assert.deepEqual(await entry.default({}), {})
+      const plugin = await active.default({
         client: { app: { log: (event) => logs.push(event.body) } },
         $: () => { throw new Error("Unexpected shell execution") },
         directory: process.cwd(),
@@ -52,11 +57,25 @@ function checkRuntime(runtimeRoot, extension, loader) {
     main().catch((error) => { console.error(error); process.exit(1) })
   `
   const args = loader ? ["--loader", pathToFileURL(loader).href] : []
-  const result = spawnSync(process.execPath, [...args, "-e", check, runtimeRoot, extension], {
-    cwd: path.join(__dirname, "..", ".."),
-    encoding: "utf8",
-  })
-  assert.strictEqual(result.status, 0, result.error?.message || result.stderr || result.stdout)
+  const fixture = fs.mkdtempSync(path.join(fs.realpathSync(os.tmpdir()), "ecc-opencode-runtime-"))
+  try {
+    const home = path.join(fixture, "home")
+    const project = path.join(fixture, "project")
+    fs.mkdirSync(home)
+    fs.mkdirSync(project)
+    const result = spawnSync(process.execPath, [...args, "-e", check, runtimeRoot, extension, String(installedHome)], {
+      cwd: project,
+      encoding: "utf8",
+      timeout: 30000,
+      env: { ...process.env, HOME: home, USERPROFILE: home,
+        CLAUDE_CONFIG_DIR: path.join(home, ".claude"), ECC_AGENT_DATA_HOME: path.join(home, ".claude"),
+        XDG_CONFIG_HOME: path.join(home, ".config"), XDG_DATA_HOME: path.join(home, ".local", "share"),
+        OPENCODE_CONFIG_DIR: installedHome ? runtimeRoot : path.join(home, ".config", "opencode") },
+    })
+    assert.strictEqual(result.status, 0, result.error?.message || result.stderr || result.stdout)
+  } finally {
+    fs.rmSync(fixture, { recursive: true, force: true })
+  }
 }
 
 function runTest(name, fn) {
@@ -262,6 +281,7 @@ function main() {
           plan.targetRoot,
           ".ts",
           path.join(repoRoot, "tests", "fixtures", "opencode-ts-loader.mjs"),
+          true,
         )
       } finally {
         fs.rmSync(fixture, { recursive: true, force: true })