diff --git a/packages/adapters/opencode-local/src/server/models.ts b/packages/adapters/opencode-local/src/server/models.ts
index aedc1967..94634d86 100644
--- a/packages/adapters/opencode-local/src/server/models.ts
+++ b/packages/adapters/opencode-local/src/server/models.ts
@@ -21,7 +21,7 @@ function resolveOpenCodeCommand(input: unknown): string {
 
 const discoveryCache = new Map<string, { expiresAt: number; models: AdapterModel[] }>();
 const VOLATILE_ENV_KEY_PREFIXES = ["PAPERCLIP_", "npm_", "NPM_"] as const;
-const VOLATILE_ENV_KEY_EXACT = new Set(["PWD", "OLDPWD", "SHLVL", "_", "TERM_SESSION_ID"]);
+const VOLATILE_ENV_KEY_EXACT = new Set(["PWD", "OLDPWD", "SHLVL", "_", "TERM_SESSION_ID", "HOME"]);
 
 function dedupeModels(models: AdapterModel[]): AdapterModel[] {
   const seen = new Set<string>();
@@ -112,7 +112,14 @@ export async function discoverOpenCodeModels(input: {
   // When the server is started via `runuser -u <user>`, HOME may still
   // reflect the parent process (e.g. /root), causing OpenCode to miss
   // provider auth credentials stored under the target user's home.
-  const resolvedHome = os.userInfo().homedir;
+  let resolvedHome: string | undefined;
+  try {
+    resolvedHome = os.userInfo().homedir || undefined;
+  } catch {
+    // os.userInfo() throws a SystemError when the current UID has no
+    // /etc/passwd entry (e.g. `docker run --user 1234` with a minimal
+    // image). Fall back to process.env.HOME.
+  }
   const runtimeEnv = normalizeEnv(ensurePathInEnv({ ...process.env, ...env, ...(resolvedHome ? { HOME: resolvedHome } : {}) }));
 
   const result = await runChildProcess(