diff --git a/tts_cli.py b/tts_cli.py
new file mode 100644
index 00000000..f43cb095
--- /dev/null
+++ b/tts_cli.py
@@ -0,0 +1,85 @@
+"""Isolated Fish Speech (S2) two-stage generation CLI (random-voice path).
+
+Stage 1: text -> semantic codes (text2semantic).
+Stage 2: semantic codes -> waveform (DAC decoder).
+
+Runs in its own venv. tilde's main server invokes this as a subprocess.
+Usage: python tts_cli.py --text "..." --out out.wav [--device mps|cpu]
+"""
+
+from __future__ import annotations
+
+import argparse
+import subprocess
+import sys
+import tempfile
+from pathlib import Path
+
+REPO = Path(__file__).resolve().parent
+CKPT = REPO / "checkpoints" / "s2-pro"
+
+
+def main() -> int:
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--text", required=True)
+    ap.add_argument("--out", required=True)
+    ap.add_argument("--device", default="mps")
+    args = ap.parse_args()
+
+    if not CKPT.exists():
+        print(f"Fish checkpoints missing: {CKPT}", file=sys.stderr)
+        return 2
+
+    work = Path(tempfile.mkdtemp(prefix="fish_"))
+
+    # Stage 1: text -> codes_0.npy
+    r1 = subprocess.run(
+        [
+            sys.executable,
+            "fish_speech/models/text2semantic/inference.py",
+            "--text",
+            args.text,
+            "--checkpoint-path",
+            str(CKPT),
+            "--device",
+            args.device,
+            "--num-samples",
+            "1",
+            "--output-dir",
+            str(work),
+        ],
+        cwd=str(REPO),
+        capture_output=True,
+    )
+    codes = work / "codes_0.npy"
+    if r1.returncode != 0 or not codes.exists():
+        print(r1.stderr.decode(errors="replace")[-600:], file=sys.stderr)
+        return 1
+
+    # Stage 2: codes -> wav
+    r2 = subprocess.run(
+        [
+            sys.executable,
+            "fish_speech/models/dac/inference.py",
+            "-i",
+            str(codes),
+            "-o",
+            args.out,
+            "--checkpoint-path",
+            str(CKPT / "codec.pth"),
+            "--device",
+            args.device,
+        ],
+        cwd=str(REPO),
+        capture_output=True,
+    )
+    if r2.returncode != 0 or not Path(args.out).exists():
+        print(r2.stderr.decode(errors="replace")[-600:], file=sys.stderr)
+        return 1
+
+    print(f"OK {args.out}", file=sys.stderr)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())