diff --git a/backends/opencode/index.ts b/backends/opencode/index.ts
index 184278c..717358c 100644
--- a/backends/opencode/index.ts
+++ b/backends/opencode/index.ts
@@ -79,10 +79,10 @@ const MAX_HOOK_ATTEMPTS = 3
 // its cached time — a synchronous retry would re-read the same stale value and
 // fail again (which is exactly why the *next* hook in a burst always succeeds).
 // A genuine timeout takes ~HOOK_TIMEOUT_MS, far above SPURIOUS_TIMEOUT_MS, so it
-// is never retried. `label` is used only for the diagnostic log. Exported so the
-// retry behaviour can be exercised by the test harness (it's a Windows libuv
-// quirk that can't otherwise be reproduced on CI).
-export async function runWithSpuriousRetry(
+// is never retried. `label` is used only for the diagnostic log. Exercised by
+// retry_test.ts (it's a Windows libuv quirk that can't otherwise be reproduced
+// on CI).
+async function runWithSpuriousRetry(
   run: () => void,
   label = "hook-entry",
 ): Promise<void> {
@@ -116,6 +116,12 @@ export async function runWithSpuriousRetry(
   }
 }
 
+// Exposed as a property on a plain object — NOT as a function-valued export —
+// so retry_test.ts can still exercise it. opencode's plugin loader treats any
+// export whose value is a function as a plugin factory and crashes the server
+// at startup (opencode-ai 1.18.30, "plugin config hook failed (N.config)").
+export const retry = { runWithSpuriousRetry }
+
 async function runHook(event: "pre" | "post", payload: object): Promise<void> {
   const shim = resolveHookEntry()
   if (!shim) {
diff --git a/tests/backends/opencode/retry_test.ts b/tests/backends/opencode/retry_test.ts
index 7bbbf3f..7dac264 100644
--- a/tests/backends/opencode/retry_test.ts
+++ b/tests/backends/opencode/retry_test.ts
@@ -36,7 +36,9 @@ async function main(): Promise<void> {
   // (the bare `D:\…` path is rejected by the ESM loader as an unsupported scheme).
   const indexPath = resolve(__dirname, "../../../backends/opencode/index.ts")
   const mod = await import(pathToFileURL(indexPath).href)
-  const runWithSpuriousRetry = mod.runWithSpuriousRetry as RunWithSpuriousRetry
+  // Exposed as `retry.runWithSpuriousRetry` (a property on a const object, not a
+  // bare function export — see backends/opencode/index.ts).
+  const runWithSpuriousRetry = mod.retry.runWithSpuriousRetry as RunWithSpuriousRetry
 
   // Success on the first attempt → run called exactly once.
   {