diff --git a/.code_doc_cli/parsers/base.py b/.code_doc_cli/parsers/base.py
new file mode 100644
index 0000000..038c004
--- /dev/null
+++ b/.code_doc_cli/parsers/base.py
@@ -0,0 +1,110 @@
+"""Base parser interface and data structures."""
+
+from abc import ABC, abstractmethod
+from dataclasses import dataclass, field
+from typing import Optional
+from enum import Enum
+
+
+class ElementType(Enum):
+    """Types of documentation elements."""
+
+    FUNCTION = "function"
+    CLASS = "class"
+    METHOD = "method"
+    INTERFACE = "interface"
+    STRUCT = "struct"
+    MODULE = "module"
+    CONSTANT = "constant"
+    VARIABLE = "variable"
+
+
+@dataclass
+class Parameter:
+    """Represents a function/method parameter."""
+
+    name: str
+    type_hint: Optional[str] = None
+    description: Optional[str] = None
+    default_value: Optional[str] = None
+    is_optional: bool = False
+
+    def __str__(self) -> str:
+        parts = [self.name]
+        if self.type_hint:
+            parts.append(f": {self.type_hint}")
+        if self.default_value:
+            parts.append(f" = {self.default_value}")
+        return "".join(parts)
+
+
+@dataclass
+class DocElement:
+    """Represents a documentation element extracted from source code."""
+
+    name: str
+    element_type: ElementType
+    description: str = ""
+    full_docstring: str = ""
+    parameters: list[Parameter] = field(default_factory=list)
+    return_type: Optional[str] = None
+    return_description: Optional[str] = None
+    raises: list[tuple[str, str]] = field(default_factory=list)
+    examples: list[str] = field(default_factory=list)
+    source_file: str = ""
+    line_number: int = 0
+    visibility: str = "public"
+    decorators: list[str] = field(default_factory=list)
+    attributes: list[tuple[str, Optional[str], Optional[str]]] = field(
+        default_factory=list
+    )
+    imports: list[str] = field(default_factory=list)
+
+
+class Parser(ABC):
+    """Abstract base class for code parsers."""
+
+    def __init__(self, file_path: str):
+        self.file_path = file_path
+        self.content: str = ""
+        self.elements: list[DocElement] = []
+
+    @abstractmethod
+    def parse(self) -> list[DocElement]:
+        """Parse the file and extract documentation elements."""
+        pass
+
+    @abstractmethod
+    def get_language_name(self) -> str:
+        """Return the name of the language this parser handles."""
+        pass
+
+    @classmethod
+    @abstractmethod
+    def supports_file(cls, file_path: str) -> bool:
+        """Check if this parser supports the given file."""
+        pass
+
+    def _read_content(self) -> str:
+        """Read file content safely."""
+        with open(self.file_path, "r", encoding="utf-8") as f:
+            return f.read()
+
+    def _strip_docstring_quotes(self, docstring: str) -> str:
+        """Remove leading/trailing quotes from docstring."""
+        if not docstring:
+            return ""
+        lines = docstring.split("\n")
+        if len(lines) == 1:
+            return docstring.strip('"""').strip("'''").strip()
+        first_line = lines[0].strip('"""').strip("'''").strip()
+        last_line = lines[-1].strip('"""').strip("'''").strip()
+        if len(lines) > 1:
+            middle_lines = lines[1:-1]
+            cleaned = []
+            for line in middle_lines:
+                stripped = line.strip()
+                if stripped:
+                    cleaned.append(stripped)
+            return "\n".join([first_line] + cleaned + [last_line]) if cleaned else first_line
+        return first_line