diff --git a/codex-rs/review b/codex-rs/review
index 9f38dfc915..fb55bd6f1b 100755
--- a/codex-rs/review
+++ b/codex-rs/review
@@ -61,8 +61,7 @@ def get_diff_text(base_ref: str, head_ref: str) -> str:
     return out
 
 
-def study_files_for_reviewer(repo_root: str, reviewer: str) -> List[str]:
-    base = os.path.join(repo_root, "prs", reviewer, "study")
+def study_files_in_dir(base: str) -> List[str]:
     if not os.path.isdir(base):
         return []
     files = []
@@ -202,9 +201,28 @@ def main():
             "Aggregates results, prints a progress bar and a summary of failed points."
         ),
     )
-    parser.add_argument("reviewer", help="GitHub login whose studyguides to use (prs/<reviewer>/study)")
+    parser.add_argument("reviewer", help="GitHub login whose studyguides to use (ignored if --study-dir is set)")
     parser.add_argument("--jobs", "-j", type=int, default=10, help="Parallel jobs (default: 10)")
     parser.add_argument("--base", default=None, help="Base ref to diff against (default: auto: origin/main or main)")
+    parser.add_argument(
+        "--study-dir",
+        "-S",
+        default=None,
+        help="Path to a folder containing PR-*-study.md files (overrides default prs/<reviewer>/study)",
+    )
+    parser.add_argument(
+        "--out-dir",
+        "-o",
+        default=None,
+        help="Directory where review JSON files should be written (default: sibling 'review' next to study-dir)",
+    )
+    parser.add_argument(
+        "--limit",
+        "-n",
+        type=int,
+        default=None,
+        help="Use only the first N study guides after sorting (like head -n)",
+    )
     parser.add_argument("--show-errors", action="store_true", help="Print per-guide errors encountered")
 
     args = parser.parse_args()
@@ -213,18 +231,30 @@ def main():
 
     repo_root = detect_repo_root() or os.getcwd()
     reviewer = args.reviewer
-    guides = study_files_for_reviewer(repo_root, reviewer)
+    study_dir = os.path.abspath(args.study_dir) if args.study_dir else os.path.join(repo_root, "prs", reviewer, "study")
+    guides = study_files_in_dir(study_dir)
     if not guides:
-        print(f"No studyguides found in prs/{reviewer}/study.", file=sys.stderr)
+        print(f"No studyguides found in {study_dir}.", file=sys.stderr)
         sys.exit(0)
 
+    total_available = len(guides)
+    if args.limit is not None:
+        if args.limit <= 0:
+            print("Error: --limit must be a positive integer.", file=sys.stderr)
+            sys.exit(2)
+        guides = guides[: args.limit]
+
     branch = get_current_branch()
     base_ref = args.base or resolve_base_ref()
     diff_text = get_diff_text(base_ref, "HEAD")
     if not diff_text.strip():
         print("Warning: empty diff vs base; all guides may be irrelevant or pass.", file=sys.stderr)
 
-    out_dir = os.path.join(repo_root, "prs", reviewer, "review")
+    if args.out_dir:
+        out_dir = os.path.abspath(args.out_dir)
+    else:
+        # Default: sibling 'review' next to the study folder
+        out_dir = os.path.join(os.path.dirname(study_dir), "review")
     os.makedirs(out_dir, exist_ok=True)
 
     total = len(guides)
@@ -235,6 +265,10 @@ def main():
     errors_all: List[Tuple[str, str]] = []    # (guide, error)
 
     print(f"Running {total} review(s) against {branch} vs {base_ref}…")
+    print(f"Study dir: {study_dir}")
+    print(f"Output dir: {out_dir}")
+    if args.limit is not None and args.limit < total_available:
+        print(f"Limit: using first {total} of {total_available} guides")
     print_progress(passed, completed, total, lock)
 
     def task(p: str):