Add --cxml flag: write the LLM view straight to a file or stdout

rendergit.py

@@ -476,10 +476,13 @@ def main() -> int:
     ap.add_argument("-o", "--out", help="Output HTML file path (default: temporary file derived from repo name)")
     ap.add_argument("--max-bytes", type=int, default=MAX_DEFAULT_BYTES, help="Max file size to render (bytes); larger files are listed but skipped")
     ap.add_argument("--no-open", action="store_true", help="Don't open the HTML file in browser after generation")
+    ap.add_argument("--cxml", nargs="?", const="-", metavar="PATH",
+                    help="Emit CXML (LLM view) instead of HTML. PATH, or '-'/omitted for stdout. "
+                         "Never builds or opens HTML — safe for untrusted repos.")
     args = ap.parse_args()
 
-    # Set default output path if not provided
-    if args.out is None:
+    # Set default output path if not provided (HTML mode only)
+    if args.out is None and args.cxml is None:
         args.out = str(derive_temp_output_path(args.repo_url))
 
     tmpdir = tempfile.mkdtemp(prefix="flatten_repo_")
@@ -497,6 +500,22 @@ def main() -> int:
         skipped_count = len(infos) - rendered_count
         print(f"✓ Found {len(infos)} files total ({rendered_count} will be rendered, {skipped_count} skipped)", file=sys.stderr)
 
+        if args.cxml is not None:
+            cxml_out = generate_cxml_text(infos, repo_dir)
+            if args.cxml == "-":
+                # Windows consoles default to cp1252; repo text routinely contains
+                # emoji/box-drawing, which would raise UnicodeEncodeError mid-pipe.
+                try:
+                    sys.stdout.reconfigure(encoding="utf-8", errors="replace")
+                except Exception:
+                    pass
+                sys.stdout.write(cxml_out)
+            else:
+                cxml_path = pathlib.Path(args.cxml)
+                cxml_path.write_text(cxml_out, encoding="utf-8")
+                print(f"✓ Wrote {bytes_human(len(cxml_out.encode('utf-8')))} of CXML to {cxml_path}", file=sys.stderr)
+            return 0  # temp dir still cleaned by the enclosing finally:
+
         print(f"🔨 Generating HTML...", file=sys.stderr)
         html_out = build_html(args.repo_url, repo_dir, head, infos)