@@ -35,6 +35,7 @@ import { QuicBinding } from './internalBinding/quic';
 import { SeaBinding } from './internalBinding/sea';
 import { SerdesBinding } from './internalBinding/serdes';
 import { SignalWrapBinding } from './internalBinding/signal_wrap';
+import { SpawnSyncBinding } from './internalBinding/spawn_sync';
 import { StreamPipeBinding } from './internalBinding/stream_pipe';
 import { StringDecoderBinding } from './internalBinding/string_decoder';
 import { SymbolsBinding } from './internalBinding/symbols';
@@ -88,6 +89,7 @@ interface InternalBindingMap {
   sea: SeaBinding;
   serdes: SerdesBinding;
   signal_wrap: SignalWrapBinding;
+  spawn_sync: SpawnSyncBinding;
   stream_pipe: StreamPipeBinding;
   string_decoder: StringDecoderBinding;
   symbols: SymbolsBinding;
 
@@ -0,0 +1,33 @@
+type SpawnSyncStdio =
+  | { type: 'ignore' }
+  | { type: 'pipe'; readable: boolean; writable: boolean; input?: ArrayBufferView }
+  | { type: 'inherit'; fd: number }
+  | { type: 'fd'; fd: number };
+
+export interface SpawnSyncOptions {
+  file: string;
+  args: readonly string[];
+  cwd?: string | null;
+  envPairs?: readonly string[] | null;
+  uid?: number | null;
+  gid?: number | null;
+  detached?: boolean;
+  windowsHide?: boolean;
+  windowsVerbatimArguments?: boolean;
+  timeout?: number | null;
+  maxBuffer?: number | null;
+  killSignal?: number | null;
+  stdio: readonly SpawnSyncStdio[];
+}
+
+export interface SpawnSyncResult {
+  error?: number;
+  status: number | null;
+  signal: string | null;
+  output: (Uint8Array | null)[] | null;
+  pid: number;
+}
+
+export interface SpawnSyncBinding {
+  spawn(options: SpawnSyncOptions): SpawnSyncResult;
+}