Initial commit

backend/app/models/.gitkeep

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+

backend/app/models/contracts.py

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+from __future__ import annotations
+
+from typing import Any, Literal
+
+from pydantic import BaseModel, Field
+
+
+class MessagePart(BaseModel):
+    type: str
+    text: str | None = None
+    data: dict[str, Any] | None = None
+
+
+class ChatMessage(BaseModel):
+    id: str
+    role: Literal["user", "assistant"]
+    parts: list[MessagePart]
+
+
+class ChatRequest(BaseModel):
+    conversation_id: str | None = None
+    selected_task_id: str | None = None
+    messages: list[ChatMessage] = Field(default_factory=list)
+    provider_id: str | None = None
+    model_id: str | None = None
+
+
+class ConversationPatch(BaseModel):
+    current_task_id: str | None = None
+    attachments: list[dict[str, Any]] | None = None
+
+
+class ParameterUpdate(BaseModel):
+    values: dict[str, float] = Field(default_factory=dict)
+
+
+class ModifyRequest(BaseModel):
+    operation: str
+    selection: dict[str, Any] = Field(default_factory=dict)
+    parameters: dict[str, Any] = Field(default_factory=dict)
+
+
+class TaskArtifact(BaseModel):
+    path: str
+    role: str
+    kind: str
+
+
+class CadResult(BaseModel):
+    task_id: str
+    revision_id: str
+    cdsl_path: str
+    step_path: str
+    glb_path: str
+    report_path: str
+    parameters_path: str | None = None
+    selector_path: str | None = None
+    edges_path: str | None = None
+    summary: str
+    reference_ids: list[str] = Field(default_factory=list)
+    engine: str = "cdsl_only"