Initial commit: add .gitignore and README

fusionagi/maa/schemas/dlt.py

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+"""Deterministic Decision Logic Tree schema: node, contract, families."""
+
+from enum import Enum
+from typing import Any
+
+from pydantic import BaseModel, Field
+
+
+class DLTFamily(str, Enum):
+    """DLT families: intent, geometry, physics, process, machine."""
+
+    INT = "DLT-INT"
+    GEO = "DLT-GEO"
+    PHY = "DLT-PHY"
+    PROC = "DLT-PROC"
+    MACH = "DLT-MACH"
+
+
+class DLTNode(BaseModel):
+    """Single node in a DLT: deterministic, evidence-backed, fail-closed."""
+
+    node_id: str = Field(..., description="Unique node id within tree")
+    family: DLTFamily = Field(...)
+    condition: str = Field(..., description="Deterministic condition expression or ref")
+    evidence_ref: str | None = Field(default=None)
+    fail_closed: bool = Field(default=True, description="On failure, reject (fail closed)")
+    children: list[str] = Field(default_factory=list, description="Child node ids")
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class DLTContract(BaseModel):
+    """Immutable, versioned DLT contract."""
+
+    contract_id: str = Field(..., description="Contract identifier")
+    version: int = Field(default=1)
+    family: DLTFamily = Field(...)
+    root_id: str = Field(..., description="Root node id")
+    nodes: dict[str, DLTNode] = Field(default_factory=dict)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+    model_config = {"frozen": False}