diff --git a/pinecone_rag/preprocessor/bugzila_preprocessor.py b/pinecone_rag/preprocessor/bugzila_preprocessor.py
new file mode 100644
index 0000000..b0bb0dc
--- /dev/null
+++ b/pinecone_rag/preprocessor/bugzila_preprocessor.py
@@ -0,0 +1,132 @@
+"""
+Bugzilla issue preprocessor for Pinecone RAG.
+
+Reads JSON files under data/bugs/** and builds one Document per bug.
+Expected JSON shape:
+- bug: bug metadata
+- comments: list of comment objects
+"""
+
+import json
+import logging
+from pathlib import Path
+from typing import Any, Dict, List, Optional
+
+from langchain_core.documents import Document
+
+from preprocessor.utility import get_timestamp_from_date
+
+logger = logging.getLogger(__name__)
+
+
+def _is_valid_content(text: str, min_length: int) -> bool:
+    """Return True if text is non-empty and has at least min_length characters (after strip)."""
+    return bool(text and len(text.strip()) >= min_length)
+
+
+def _build_content(bug: Dict[str, Any], comments: List[Any]) -> str:
+    """Build plain-text document content from bug metadata and comments."""
+    lines: List[str] = []
+    lines.append(f"Product: {bug.get('product', '')}")
+    lines.append(f"Component: {bug.get('component', '')}")
+    lines.append(f"Status: {bug.get('status', '')}")
+    lines.append(f"Resolution: {bug.get('resolution', '')}")
+    lines.append(f"Severity: {bug.get('severity', '')}")
+    lines.append(f"Priority: {bug.get('priority', '')}")
+
+    keywords = bug.get("keywords") or []
+    if isinstance(keywords, list) and keywords:
+        lines.append(f"Keywords: {', '.join(str(k) for k in keywords)}")
+
+    lines.append("")
+    lines.append("Description and comments:")
+
+    for comment in comments:
+        if not isinstance(comment, dict):
+            continue
+        text = (comment.get("text") or "").strip()
+        if not text:
+            continue
+        creator = comment.get("creator") or ""
+        created = comment.get("creation_time") or comment.get("time") or ""
+        lines.append(f"\n--- Comment by {creator} ({created}) ---\n{text}")
+
+    return "\n".join(lines).strip()
+
+
+def _load_bug_document(json_path: Path, min_content_length: int) -> Optional[Document]:
+    """Load one Bugzilla JSON file and convert it into a Document."""
+    try:
+        data = json.loads(json_path.read_text(encoding="utf-8", errors="replace"))
+    except (json.JSONDecodeError, OSError) as exc:
+        logger.debug("Skip %s: %s", json_path.name, exc)
+        return None
+
+    bug = data.get("bug")
+    if not isinstance(bug, dict):
+        logger.debug("Skip %s: missing bug object", json_path.name)
+        return None
+
+    comments = data.get("comments") or []
+    if not isinstance(comments, list):
+        comments = []
+
+    content = _build_content(bug, comments)
+    if not _is_valid_content(content, min_content_length):
+        logger.debug("Skip %s: content too short", json_path.name)
+        return None
+
+    bug_id = bug.get("id", data.get("id", -1))
+    is_open = bool(bug.get("is_open", False))
+    last_change = bug.get("last_change_time")
+    created = bug.get("creation_time")
+    bug_url = bug.get("url") or f"https://bugs.llvm.org/show_bug.cgi?id={bug_id}"
+
+    metadata: Dict[str, Any] = {
+        "type": "issue-bugzilla",
+        "number": bug_id,
+        "title": (bug.get("summary") or "").strip(),
+        "url": bug_url,
+        "author": bug.get("creator", "") or "",
+        "state": bug.get("status", "") or "",
+        "state_reason": bug.get("resolution", "") or "",
+        "created_at": get_timestamp_from_date(created or "", 0.0),
+        "updated_at": get_timestamp_from_date(last_change or "", 0.0),
+        "closed_at": 0.0 if is_open else get_timestamp_from_date(last_change or "", 0.0),
+    }
+
+    return Document(page_content=content, metadata=metadata)
+
+
+class BugIssuePreprocessor:
+    """Load Bugzilla issue JSON files from data/bugs and produce Documents."""
+
+    def __init__(
+        self, data_dir: str = "data/github/Clang/bugs", min_content_length: int = 10
+    ):
+        """Initialize with the directory containing Bugzilla JSON files and minimum content length."""
+        self.data_dir = Path(data_dir)
+        self.min_content_length = min_content_length
+
+    def load_documents(self, limit: Optional[int] = None) -> List[Document]:
+        """Load Bugzilla JSON files from data/github/Clang/bugs/**/*.json."""
+        if not self.data_dir.exists():
+            logger.warning("Bug data dir does not exist: %s", self.data_dir)
+            return []
+
+        json_paths = sorted(self.data_dir.rglob("*.json"))
+        if limit is not None:
+            json_paths = json_paths[:limit]
+
+        documents: List[Document] = []
+        for json_path in json_paths:
+            if json_path.name.startswith("."):
+                continue
+            doc = _load_bug_document(json_path, self.min_content_length)
+            if doc is not None:
+                documents.append(doc)
+
+        logger.info(
+            "Loaded %d Bugzilla issue documents from %s", len(documents), self.data_dir
+        )
+        return documents
diff --git a/requirements.txt b/requirements.txt
index ac66770..b48c412 100644
Binary files a/requirements.txt and b/requirements.txt differ