fix(import): emit extractor output as UTF-8 on Windows (#122)

* fix(import): emit extractor digests as UTF-8

* fix(import): limit UTF-8 setup to CLI entrypoints

* test(import): normalize cross-platform newline parity

skills/diagram-design/scripts/drawio_extract.py

@@ -43,6 +43,13 @@ MAX_INPUT_BYTES = 32 * 1024 * 1024
 MAX_XML_BYTES = 64 * 1024 * 1024
 
 
+def _configure_stdout_utf8() -> None:
+    """Emit digests as UTF-8 even when Windows selects a legacy codepage."""
+    reconfigure = getattr(sys.stdout, "reconfigure", None)
+    if reconfigure is not None:
+        reconfigure(encoding="utf-8", errors="strict")
+
+
 class PayloadTooLarge(ValueError):
     """Raised when compressed metadata expands beyond the supported limit."""
 
@@ -886,4 +893,5 @@ def main(argv: list[str] | None = None) -> int:
 
 
 if __name__ == "__main__":
+    _configure_stdout_utf8()
     raise SystemExit(main())

skills/diagram-design/scripts/mermaid_extract.py

@@ -51,6 +51,13 @@ MARKDOWN_SUFFIXES = {".md", ".markdown", ".mdown", ".mkd"}
 MERMAID_SUFFIXES = {".mmd", ".mermaid"}
 
 
+def _configure_stdout_utf8() -> None:
+    """Emit digests as UTF-8 even when Windows selects a legacy codepage."""
+    reconfigure = getattr(sys.stdout, "reconfigure", None)
+    if reconfigure is not None:
+        reconfigure(encoding="utf-8", errors="strict")
+
+
 def _fail(message: str) -> NoReturn:
     print(f"mermaid_extract: {message}", file=sys.stderr)
     raise SystemExit(2)
@@ -1322,4 +1329,5 @@ def main(argv: list[str] | None = None) -> int:
 
 
 if __name__ == "__main__":
+    _configure_stdout_utf8()
     raise SystemExit(main())