Initial commit: add .gitignore and README

fusionagi/maa/layers/geometry_kernel.py

@@ -0,0 +1,81 @@
+"""Layer 3 — Geometry Authority Kernel: implicit geometry, constraint solvers, feature lineage."""
+
+from abc import ABC, abstractmethod
+from typing import Any
+
+from pydantic import BaseModel, Field
+
+
+class FeatureLineageEntry(BaseModel):
+    """Single feature lineage entry: feature -> intent node, physics justification, process eligibility."""
+
+    feature_id: str = Field(...)
+    intent_node_id: str = Field(...)
+    physics_justification_ref: str | None = Field(default=None)
+    process_eligible: bool = Field(default=False)
+
+
+class GeometryAuthorityInterface(ABC):
+    """
+    Interface for implicit geometry, constraint solvers, feature lineage.
+    Every geometric feature must map to intent node, physics justification, process eligibility.
+    Orphan geometry is prohibited.
+    """
+
+    @abstractmethod
+    def add_feature(
+        self,
+        feature_id: str,
+        intent_node_id: str,
+        physics_justification_ref: str | None = None,
+        process_eligible: bool = False,
+        payload: dict[str, Any] | None = None,
+    ) -> FeatureLineageEntry:
+        """Register a feature with lineage; orphan (no intent) prohibited."""
+        ...
+
+    @abstractmethod
+    def get_lineage(self, feature_id: str) -> FeatureLineageEntry | None:
+        """Return lineage for feature or None."""
+        ...
+
+    @abstractmethod
+    def validate_no_orphans(self) -> list[str]:
+        """Return list of feature ids with no valid lineage (orphans); must be empty for MPC."""
+        ...
+
+
+class InMemoryGeometryKernel(GeometryAuthorityInterface):
+    """
+    In-memory lineage model; no concrete CAD kernel.
+    Only tracks features registered via add_feature; validate_no_orphans returns []
+    since every stored feature has lineage. For a kernel that tracks all feature ids
+    separately, override validate_no_orphans to return ids not in lineage.
+    """
+
+    def __init__(self) -> None:
+        self._lineage: dict[str, FeatureLineageEntry] = {}
+
+    def add_feature(
+        self,
+        feature_id: str,
+        intent_node_id: str,
+        physics_justification_ref: str | None = None,
+        process_eligible: bool = False,
+        payload: dict[str, Any] | None = None,
+    ) -> FeatureLineageEntry:
+        entry = FeatureLineageEntry(
+            feature_id=feature_id,
+            intent_node_id=intent_node_id,
+            physics_justification_ref=physics_justification_ref,
+            process_eligible=process_eligible,
+        )
+        self._lineage[feature_id] = entry
+        return entry
+
+    def get_lineage(self, feature_id: str) -> FeatureLineageEntry | None:
+        return self._lineage.get(feature_id)
+
+    def validate_no_orphans(self) -> list[str]:
+        """Return []; this stub only tracks registered features, so none are orphans."""
+        return []