fix(cli-run): skip unresolved opencode bin path injection

src/cli/run/opencode-bin-path.ts

@@ -1,5 +1,6 @@
 import { delimiter, dirname } from "node:path"
 import { createRequire } from "node:module"
+import { existsSync } from "node:fs"
 
 type EnvLike = Record<string, string | undefined>
 
@@ -8,6 +9,7 @@ const resolveFromCurrentModule = createRequire(import.meta.url).resolve
 export function prependResolvedOpencodeBinToPath(
   env: EnvLike = process.env,
   resolve: (id: string) => string = resolveFromCurrentModule,
+  pathExists: (path: string) => boolean = existsSync,
 ): void {
   let resolvedPath: string
   try {
@@ -16,7 +18,15 @@ export function prependResolvedOpencodeBinToPath(
     return
   }
 
+  if (!pathExists(resolvedPath)) {
+    return
+  }
+
   const opencodeBinDir = dirname(resolvedPath)
+  if (!pathExists(opencodeBinDir)) {
+    return
+  }
+
   const currentPath = env.PATH ?? ""
   const pathSegments = currentPath ? currentPath.split(delimiter) : []