diff --git a/app/src/promptforge/registry/models.py b/app/src/promptforge/registry/models.py
new file mode 100644
index 0000000..8314f30
--- /dev/null
+++ b/app/src/promptforge/registry/models.py
@@ -0,0 +1,86 @@
+from datetime import datetime
+from typing import TYPE_CHECKING, Any, Dict, List, Optional
+from uuid import uuid4
+
+from pydantic import BaseModel, Field
+
+if TYPE_CHECKING:
+    from ..core.prompt import Prompt
+
+
+class RegistryEntry(BaseModel):
+    """Entry in the prompt registry."""
+
+    id: Optional[str] = Field(default_factory=lambda: str(uuid4()))
+    name: str
+    description: Optional[str] = None
+    content: str
+    author: Optional[str] = None
+    version: str = "1.0.0"
+    tags: List[str] = Field(default_factory=list)
+    provider: Optional[str] = None
+    variables: List[Dict[str, Any]] = Field(default_factory=list)
+    validation_rules: List[Dict[str, Any]] = Field(default_factory=list)
+    downloads: int = 0
+    likes: int = 0
+    rating: float = 0.0
+    is_local: bool = True
+    is_published: bool = False
+    added_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    def to_prompt_content(self) -> str:
+        """Convert entry to prompt YAML content."""
+        from ..core.prompt import Prompt, PromptVariable, ValidationRule
+
+        variables = [PromptVariable(**v) for v in self.variables]
+        validation_rules = [ValidationRule(**r) for r in self.validation_rules]
+
+        prompt = Prompt(
+            id=str(self.id) if self.id else "",
+            name=self.name,
+            description=self.description,
+            content=self.content,
+            variables=variables,
+            validation_rules=validation_rules,
+            provider=self.provider,
+            tags=self.tags,
+            version=self.version,
+        )
+        return prompt.to_yaml()
+
+    @classmethod
+    def from_prompt(cls, prompt: "Prompt", author: Optional[str] = None) -> "RegistryEntry":
+        """Create registry entry from a Prompt."""
+        return cls(
+            id=str(prompt.id),
+            name=prompt.name,
+            description=prompt.description,
+            content=prompt.content,
+            author=author,
+            version=prompt.version,
+            tags=prompt.tags,
+            provider=prompt.provider,
+            variables=[v.model_dump() for v in prompt.variables],
+            validation_rules=[r.model_dump() for r in prompt.validation_rules],
+            is_local=True,
+            added_at=datetime.utcnow(),
+        )
+
+
+class RegistrySearchResult(BaseModel):
+    """Search result from registry."""
+
+    entry: RegistryEntry
+    relevance_score: float = 0.0
+    highlights: Dict[str, List[str]] = Field(default_factory=dict)
+
+
+class RegistryStats(BaseModel):
+    """Registry statistics."""
+
+    total_entries: int = 0
+    local_entries: int = 0
+    published_entries: int = 0
+    popular_tags: List[Dict[str, Any]] = Field(default_factory=list)
+    top_authors: List[Dict[str, Any]] = Field(default_factory=list)