diff --git a/src/models.py b/src/models.py
new file mode 100644
index 0000000..dec861e
--- /dev/null
+++ b/src/models.py
@@ -0,0 +1,81 @@
+"""Data models for Code Pattern Search CLI."""
+
+from dataclasses import dataclass, field
+from typing import Optional
+
+
+@dataclass
+class MatchLocation:
+    """Represents a location where a pattern matched."""
+
+    file_path: str
+    line_number: int
+    line_content: str
+    match_start: int
+    match_end: int
+
+    def to_dict(self) -> dict:
+        """Convert to dictionary."""
+        return {
+            "file_path": self.file_path,
+            "line_number": self.line_number,
+            "line_content": self.line_content,
+            "match_start": self.match_start,
+            "match_end": self.match_end,
+        }
+
+
+@dataclass
+class SearchResult:
+    """Represents search results from a single repository."""
+
+    repo_name: str
+    repo_url: str
+    stars: int
+    description: Optional[str] = None
+    language: Optional[str] = None
+    matches: list[MatchLocation] = field(default_factory=list)
+    total_matches: int = 0
+    score: float = 0.0
+
+    def to_dict(self) -> dict:
+        """Convert to dictionary."""
+        return {
+            "repo_name": self.repo_name,
+            "repo_url": self.repo_url,
+            "stars": self.stars,
+            "description": self.description,
+            "language": self.language,
+            "matches": [m.to_dict() for m in self.matches],
+            "total_matches": self.total_matches,
+            "score": self.score,
+        }
+
+    def get_match_summary(self) -> dict[str, int]:
+        """Get a summary of matches grouped by file."""
+        summary: dict[str, int] = {}
+        for match in self.matches:
+            summary[match.file_path] = summary.get(match.file_path, 0) + 1
+        return summary
+
+
+@dataclass
+class ExportConfig:
+    """Configuration for export options."""
+
+    format: str = "json"
+    include_metadata: bool = True
+    pretty_print: bool = True
+
+
+@dataclass
+class SearchConfig:
+    """Configuration for search options."""
+
+    pattern: str
+    language: Optional[str] = None
+    stars_min: int = 0
+    stars_max: Optional[int] = None
+    max_repos: int = 10
+    use_cache: bool = True
+    preset: Optional[str] = None