From 98578d3a7b4cbb0e700236df346100141c724fd8 Mon Sep 17 00:00:00 2001
From: kenryu42 <61741059+kenryu42@users.noreply.github.com>
Date: Sat, 17 Jan 2026 05:32:05 +0900
Subject: [PATCH] fix(bun): reinstall plugins when cache module missing (#8815)

---
 packages/opencode/src/bun/index.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/opencode/src/bun/index.ts b/packages/opencode/src/bun/index.ts
index fe2f0dec3..a18bbd14d 100644
--- a/packages/opencode/src/bun/index.ts
+++ b/packages/opencode/src/bun/index.ts
@@ -2,6 +2,7 @@ import z from "zod"
 import { Global } from "../global"
 import { Log } from "../util/log"
 import path from "path"
+import { Filesystem } from "../util/filesystem"
 import { NamedError } from "@opencode-ai/util/error"
 import { readableStreamToText } from "bun"
 import { createRequire } from "module"
@@ -71,7 +72,10 @@ export namespace BunProc {
       await Bun.write(pkgjson.name!, JSON.stringify(result, null, 2))
       return result
     })
-    if (parsed.dependencies[pkg] === version) return mod
+    const dependencies = parsed.dependencies ?? {}
+    if (!parsed.dependencies) parsed.dependencies = dependencies
+    const modExists = await Filesystem.exists(mod)
+    if (dependencies[pkg] === version && modExists) return mod
 
     const proxied = !!(
       process.env.HTTP_PROXY ||