Add quiet smoke reporting

tools/prompt_smoke.py

@@ -106,12 +106,14 @@ SdxlTrigger = "mythp0rt"
 
 @dataclass
 class SmokeReport:
+    verbose: bool = True
     passed: list[str] = field(default_factory=list)
     failed: list[str] = field(default_factory=list)
 
     def ok(self, name: str) -> None:
         self.passed.append(name)
-        print(f"PASS {name}")
+        if self.verbose:
+            print(f"PASS {name}")
 
     def fail(self, name: str, message: str) -> None:
         detail = f"{name}: {message}"
@@ -8924,13 +8926,18 @@ def main(argv: list[str] | None = None) -> int:
         action="append",
         help="Run only the named smoke case. Can be passed multiple times.",
     )
+    parser.add_argument(
+        "--quiet",
+        action="store_true",
+        help="Suppress passing case lines and print one success summary.",
+    )
     args = parser.parse_args(argv)
     if args.list:
         for name, _func in SMOKE_CASES:
             print(name)
         return 0
     selected = set(args.case or [])
-    report = SmokeReport()
+    report = SmokeReport(verbose=not args.quiet)
     for name, func in SMOKE_CASES:
         if selected and name not in selected:
             continue
@@ -8940,7 +8947,10 @@ def main(argv: list[str] | None = None) -> int:
             report.fail(name, str(exc))
         else:
             report.ok(name)
-    print(f"\nSummary: {len(report.passed)} passed, {len(report.failed)} failed")
+    if args.quiet and not report.failed:
+        print(f"OK: smoke passed ({len(report.passed)} cases).")
+    else:
+        print(f"\nSummary: {len(report.passed)} passed, {len(report.failed)} failed")
     if report.failed:
         return 1
     return 0