diff --git a/models.py b/models.py
new file mode 100644
index 0000000..7302698
--- /dev/null
+++ b/models.py
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+import os
+from typing import List, Optional
+from pydantic import BaseModel, Field, validator
+
+class TaskCard(BaseModel):
+    """Pydantic model representing a structured task card.
+
+    Attributes
+    ----------
+    title: str
+        Short title of the task (max 10 words).
+    subject: str
+        Subject or topic of the task.
+    deadline: Optional[str]
+        Deadline string if mentioned, otherwise None.
+    deliverable: str
+        What needs to be submitted.
+    requirements: List[str]
+        List of concrete requirements extracted from the raw text.
+    difficulty: str
+        Difficulty level: "легко", "средне" or "сложно".
+    grading_criteria: Optional[str]
+        Grading criteria if present.
+    tags: List[str]
+        Tags describing the task.
+    """
+
+    title: str = Field(..., description="Short title of the task (max 10 words)")
+    subject: str = Field(..., description="Subject or topic of the task")
+    deadline: Optional[str] = Field(None, description="Deadline if mentioned")
+    deliverable: str = Field(..., description="What needs to be submitted")
+    requirements: List[str] = Field(default_factory=list, description="Concrete requirements")
+    difficulty: str = Field(..., description="Difficulty level: легко, средне, сложно")
+    grading_criteria: Optional[str] = Field(None, description="Grading criteria if present")
+    tags: List[str] = Field(default_factory=list, description="Tags describing the task")
+
+    @validator("title")
+    def title_word_limit(cls, v: str) -> str:
+        if len(v.split()) > 10:
+            raise ValueError("Title must be at most 10 words")
+        return v
+
+    def to_markdown(self) -> str:
+        """Return a nicely formatted Markdown representation of the card."""
+        md = [f"## {self.title}"]
+        md.append(f"**Предмет:** {self.subject}")
+        if self.deadline:
+            md.append(f"**Дедлайн:** {self.deadline}")
+        md.append(f"**Сдать:** {self.deliverable}")
+        if self.requirements:
+            md.append("**Требования:**")
+            for req in self.requirements:
+                md.append(f"- {req}")
+        md.append(f"**Сложность:** {self.difficulty}")
+        if self.grading_criteria:
+            md.append(f"**Критерии оценки:** {self.grading_criteria}")
+        if self.tags:
+            md.append("**Теги:** " + ", ".join(self.tags))
+        return "\n".join(md)
+
+# End of models.py