fix: Windows MCP encoding crash and build abort on empty/corrupted PDFs

packages/leann-core/src/leann/cli.py

@@ -175,6 +175,11 @@ def suppress_cpp_output(suppress: bool = True):
 def extract_pdf_text_with_pymupdf(file_path: str) -> str | None:
     """Extract text from PDF using PyMuPDF for better quality."""
     try:
+        if os.path.getsize(file_path) == 0:
+            # Empty file: nothing to extract, skip instead of letting
+            # fitz.EmptyFileError abort the whole build.
+            return ""
+
         import fitz  # PyMuPDF
 
         doc = fitz.open(file_path)
@@ -186,11 +191,18 @@ def extract_pdf_text_with_pymupdf(file_path: str) -> str | None:
     except ImportError:
         # Fallback to default reader
         return None
+    except Exception:
+        # Skip corrupted PDFs instead of aborting the whole build
+        return ""
 
 
 def extract_pdf_text_with_pdfplumber(file_path: str) -> str | None:
     """Extract text from PDF using pdfplumber for better quality."""
     try:
+        if os.path.getsize(file_path) == 0:
+            # Empty file: nothing to extract, skip instead of aborting the build.
+            return ""
+
         import pdfplumber
 
         text = ""
@@ -201,6 +213,9 @@ def extract_pdf_text_with_pdfplumber(file_path: str) -> str | None:
     except ImportError:
         # Fallback to default reader
         return None
+    except Exception:
+        # Skip corrupted PDFs instead of aborting the whole build
+        return ""
 
 
 class LeannCLI:

packages/leann-core/src/leann/mcp.py

@@ -21,9 +21,14 @@ def _leann_cmd() -> list[str]:
 def _run_leann(*args, timeout=120):
     """Run a leann CLI command and return (returncode, stdout, stderr)."""
     result = subprocess.run(
-        ["leann", *args],
+        [*_leann_cmd(), *args],
         capture_output=True,
         text=True,
+        # The leann CLI prints UTF-8 (emoji, CJK, ...). Decode explicitly:
+        # text=True alone falls back to the locale encoding (e.g. GBK on
+        # Chinese Windows) and crashes the subprocess reader thread.
+        encoding="utf-8",
+        errors="replace",
         timeout=timeout,
     )
     return result.returncode, result.stdout, result.stderr