feat: implement formal decision registry

src/govoplan_decisions/__init__.py

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+"""GovOPlaN Decisions module."""
+
+__version__ = "0.1.14"

src/govoplan_decisions/backend/__init__.py

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+"""Decisions backend."""

src/govoplan_decisions/backend/db/__init__.py

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+from govoplan_decisions.backend.db.models import FormalDecisionRevision
+
+__all__ = ["FormalDecisionRevision"]

src/govoplan_decisions/backend/db/models.py

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+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any
+import uuid
+
+from sqlalchemy import DateTime, ForeignKey, Index, JSON, String, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column
+
+from govoplan_core.db.base import Base, TimestampMixin
+
+
+def new_uuid() -> str:
+    return str(uuid.uuid4())
+
+
+class FormalDecisionRevision(Base, TimestampMixin):
+    __tablename__ = "formal_decision_revisions"
+    __table_args__ = (
+        UniqueConstraint("tenant_id", "decision_id", "revision", name="uq_formal_decision_revision"),
+        Index("ix_formal_decision_current", "tenant_id", "decision_id", "superseded_at"),
+        Index("ix_formal_decision_catalogue", "tenant_id", "state", "decision_type", "recorded_at"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    decision_id: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
+    revision: Mapped[str] = mapped_column(String(120), nullable=False)
+    previous_revision_id: Mapped[str | None] = mapped_column(
+        ForeignKey("formal_decision_revisions.id", ondelete="RESTRICT"),
+        nullable=True,
+        index=True,
+    )
+    decision_type: Mapped[str] = mapped_column(String(120), nullable=False, index=True)
+    state: Mapped[str] = mapped_column(String(30), nullable=False, index=True)
+    valid_from: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    valid_to: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    recorded_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, index=True)
+    superseded_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    payload: Mapped[dict[str, Any]] = mapped_column(JSON, nullable=False)
+    created_by: Mapped[str | None] = mapped_column(String(255), nullable=True, index=True)
+
+
+__all__ = ["FormalDecisionRevision"]

src/govoplan_decisions/backend/manifest.py

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+from __future__ import annotations
+
+from pathlib import Path
+
+from govoplan_core.core.institutional import CAPABILITY_DECISION_REGISTRY
+from govoplan_core.core.module_guards import drop_table_retirement_provider, persistent_table_uninstall_guard
+from govoplan_core.core.modules import CapabilityDocumentation, DocumentationLink, DocumentationTopic, MigrationSpec, ModuleContext, ModuleInterfaceProvider, ModuleManifest, PermissionDefinition, RoleTemplate
+from govoplan_core.core.provider_governance import declared_module_architecture
+from govoplan_core.db.base import Base
+from govoplan_decisions.backend.db import models as decision_models
+from govoplan_decisions.backend.service import SqlDecisionRegistry
+
+
+MODULE_ID = "decisions"
+MODULE_NAME = "Decisions"
+MODULE_VERSION = "0.1.14"
+READ_SCOPE = "decisions:decision:read"
+SENSITIVE_READ_SCOPE = "decisions:decision:read_sensitive"
+WRITE_SCOPE = "decisions:decision:write"
+ADMIN_SCOPE = "decisions:decision:admin"
+
+
+def _permission(scope: str, label: str, description: str) -> PermissionDefinition:
+    module_id, resource, action = scope.split(":", 2)
+    return PermissionDefinition(scope=scope, label=label, description=description, category="Decisions", level="tenant", module_id=module_id, resource=resource, action=action)
+
+
+def _router(_context: ModuleContext):
+    from govoplan_decisions.backend.router import router
+
+    return router
+
+
+def _registry(_context: ModuleContext) -> SqlDecisionRegistry:
+    return SqlDecisionRegistry()
+
+
+manifest = ModuleManifest(
+    id=MODULE_ID,
+    name=MODULE_NAME,
+    version=MODULE_VERSION,
+    optional_dependencies=("mandates", "approvals", "committee", "cases", "audit", "policy", "records", "files", "postbox", "mail"),
+    provides_interfaces=(ModuleInterfaceProvider(name="decisions.formal_outcome", version="0.1.0"), ModuleInterfaceProvider(name="decisions.reconstruction", version="0.1.0")),
+    permissions=(
+        _permission(READ_SCOPE, "View Decision metadata", "View formal Decision metadata and evidence references."),
+        _permission(SENSITIVE_READ_SCOPE, "View protected Decisions", "View protected reasoning, operative results, and conditions."),
+        _permission(WRITE_SCOPE, "Record Decisions", "Record governed formal outcomes and lifecycle revisions."),
+        _permission(ADMIN_SCOPE, "Administer Decisions", "Administer Decision access, lifecycle, and recovery."),
+    ),
+    role_templates=(
+        RoleTemplate(slug="decision_officer", name="Decision officer", description="Record and inspect formal Decisions.", permissions=(READ_SCOPE, SENSITIVE_READ_SCOPE, WRITE_SCOPE)),
+        RoleTemplate(slug="decision_auditor", name="Decision auditor", description="Reconstruct protected formal outcomes.", permissions=(READ_SCOPE, SENSITIVE_READ_SCOPE)),
+    ),
+    route_factory=_router,
+    capability_factories={CAPABILITY_DECISION_REGISTRY: _registry},
+    capability_documentation={CAPABILITY_DECISION_REGISTRY: CapabilityDocumentation(label="Formal Decision registry", summary="Records and resolves immutable, reconstructable formal outcomes.", contract_version="0.1.0")},
+    migration_spec=MigrationSpec(
+        module_id=MODULE_ID,
+        metadata=Base.metadata,
+        script_location=str(Path(__file__).with_name("migrations") / "versions"),
+        retirement_supported=True,
+        retirement_provider=drop_table_retirement_provider(decision_models.FormalDecisionRevision, label="Decisions"),
+        retirement_notes="Destructive retirement requires a database snapshot and removes formal Decision history.",
+    ),
+    uninstall_guard_providers=(persistent_table_uninstall_guard(decision_models.FormalDecisionRevision, label="Decisions"),),
+    documentation=(
+        DocumentationTopic(
+            id="decisions.formal-outcome",
+            title="Formal institutional Decisions",
+            summary="Reconstruct authority, evidence, reasoning, outcome, effects, and review history.",
+            body="Decisions preserves immutable formal outcomes. Corrections and revocations create linked revisions; requested and observed effects remain distinct for reconciliation.",
+            layer="configured",
+            documentation_types=("admin", "user"),
+            audience=("user", "operator", "module_admin", "auditor"),
+            links=(DocumentationLink(label="Decisions domain and recovery", href="govoplan-decisions/docs/DECISIONS_DOMAIN.md", kind="repository"),),
+        ),
+    ),
+    architecture=declared_module_architecture(
+        layer="governance_accountability",
+        kind="domain",
+        maturity="vertical_slice",
+        documentation_ref="docs/DECISIONS_DOMAIN.md",
+        test_ref="tests/test_decisions.py",
+        known_limits=("No dedicated Decision WebUI is included; consuming procedure modules present outcomes in context.",),
+        supported_authority_modes=("native_authoritative",),
+        owned_concepts=("formal decision", "decision correction", "decision effect observation"),
+        non_owned_concepts=("approval gate", "committee deliberation", "effect execution", "record binary"),
+        reference_packages=("product.service-to-decision",),
+        migration_docs=("docs/DECISIONS_DOMAIN.md",),
+        recovery_docs=("docs/DECISIONS_DOMAIN.md",),
+        security_docs=("docs/DECISIONS_DOMAIN.md",),
+        operations_docs=("docs/DECISIONS_DOMAIN.md",),
+    ),
+)
+
+
+def get_manifest() -> ModuleManifest:
+    return manifest

src/govoplan_decisions/backend/migrations/__init__.py

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+"""Decisions migrations."""

src/govoplan_decisions/backend/migrations/versions/__init__.py

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+"""Decision migration revisions."""

src/govoplan_decisions/backend/migrations/versions/d1e4f5a6b7c8_v0114_decisions_baseline.py

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+"""v0.1.14 Decisions baseline.
+
+Revision ID: d1e4f5a6b7c8
+Revises: None
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "d1e4f5a6b7c8"
+down_revision = None
+branch_labels = None
+depends_on = "4f2a9c8e7b6d"
+
+
+def upgrade() -> None:
+    op.create_table(
+        "formal_decision_revisions",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("decision_id", sa.String(length=255), nullable=False),
+        sa.Column("revision", sa.String(length=120), nullable=False),
+        sa.Column("previous_revision_id", sa.String(length=36), nullable=True),
+        sa.Column("decision_type", sa.String(length=120), nullable=False),
+        sa.Column("state", sa.String(length=30), nullable=False),
+        sa.Column("valid_from", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("valid_to", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("recorded_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("superseded_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("payload", sa.JSON(), nullable=False),
+        sa.Column("created_by", sa.String(length=255), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(["previous_revision_id"], ["formal_decision_revisions.id"], name=op.f("fk_formal_decision_revisions_previous_revision_id_formal_decision_revisions"), ondelete="RESTRICT"),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_formal_decision_revisions")),
+        sa.UniqueConstraint("tenant_id", "decision_id", "revision", name="uq_formal_decision_revision"),
+    )
+    for column in ("tenant_id", "decision_id", "previous_revision_id", "decision_type", "state", "recorded_at", "superseded_at", "created_by"):
+        op.create_index(op.f(f"ix_formal_decision_revisions_{column}"), "formal_decision_revisions", [column], unique=False)
+    op.create_index("ix_formal_decision_current", "formal_decision_revisions", ["tenant_id", "decision_id", "superseded_at"], unique=False)
+    op.create_index("ix_formal_decision_catalogue", "formal_decision_revisions", ["tenant_id", "state", "decision_type", "recorded_at"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_table("formal_decision_revisions")

src/govoplan_decisions/backend/router.py

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+from __future__ import annotations
+
+from typing import Any
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, get_api_principal, has_scope
+from govoplan_core.core.institutional import InstitutionalContextError, InstitutionalReference
+from govoplan_core.db.session import get_session
+from govoplan_decisions.backend.manifest import READ_SCOPE, SENSITIVE_READ_SCOPE, WRITE_SCOPE
+from govoplan_decisions.backend.schemas import DecisionListResponse, DecisionWriteRequest
+from govoplan_decisions.backend.service import DecisionStoreError, SqlDecisionRegistry, decision_from_mapping, list_decisions
+
+
+router = APIRouter(prefix="/decisions", tags=["decisions"])
+
+
+def _require(principal: ApiPrincipal, scope: str) -> None:
+    if not has_scope(principal, scope):
+        raise HTTPException(status_code=403, detail=f"Missing scope: {scope}")
+
+
+def _protected(principal: ApiPrincipal, requested: bool) -> bool:
+    if requested:
+        _require(principal, SENSITIVE_READ_SCOPE)
+    return requested
+
+
+def _error(exc: Exception) -> HTTPException:
+    message = str(exc)
+    return HTTPException(status_code=409 if "conflict" in message.lower() else 400, detail=message)
+
+
+@router.get("", response_model=DecisionListResponse)
+def api_list_decisions(
+    decision_state: str | None = Query(default=None, alias="state"),
+    decision_type: str | None = None,
+    include_protected: bool = False,
+    limit: int = Query(default=100, ge=1, le=200),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> DecisionListResponse:
+    _require(principal, READ_SCOPE)
+    disclose = _protected(principal, include_protected)
+    items = list_decisions(session, principal, state=decision_state, decision_type=decision_type, limit=limit)
+    return DecisionListResponse(decisions=[item.to_dict(include_protected=disclose) for item in items])
+
+
+@router.get("/{decision_id}", response_model=dict[str, Any])
+def api_get_decision(
+    decision_id: str,
+    revision: str | None = None,
+    include_protected: bool = False,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> dict[str, Any]:
+    _require(principal, READ_SCOPE)
+    disclose = _protected(principal, include_protected)
+    item = SqlDecisionRegistry().get_decision(
+        session,
+        principal,
+        reference=InstitutionalReference(kind="decision", owner_module="decisions", object_id=decision_id, tenant_id=principal.tenant_id, version=revision),
+    )
+    if item is None:
+        raise HTTPException(status_code=404, detail="Formal Decision not found")
+    return item.to_dict(include_protected=disclose)
+
+
+@router.post("", response_model=dict[str, Any], status_code=status.HTTP_201_CREATED)
+def api_record_decision(
+    payload: DecisionWriteRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> dict[str, Any]:
+    _require(principal, WRITE_SCOPE)
+    try:
+        item = SqlDecisionRegistry().record_decision(
+            session,
+            principal,
+            decision=decision_from_mapping(payload.decision),
+            expected_revision=payload.expected_revision,
+        )
+        session.commit()
+    except (DecisionStoreError, InstitutionalContextError) as exc:
+        session.rollback()
+        raise _error(exc) from exc
+    return item.to_dict(include_protected=True)
+
+
+__all__ = ["router"]

src/govoplan_decisions/backend/schemas.py

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+from __future__ import annotations
+
+from typing import Any
+
+from pydantic import BaseModel, ConfigDict, Field
+
+
+class DecisionWriteRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    decision: dict[str, Any]
+    expected_revision: str | None = Field(default=None, max_length=120)
+
+
+class DecisionListResponse(BaseModel):
+    decisions: list[dict[str, Any]]
+
+
+__all__ = ["DecisionListResponse", "DecisionWriteRequest"]

src/govoplan_decisions/backend/service.py

@@ -0,0 +1,246 @@
+from __future__ import annotations
+
+from datetime import UTC, datetime
+from typing import Any, Mapping
+
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.institutional import (
+    FormalDecision,
+    InstitutionalContextError,
+    InstitutionalReference,
+    TemporalRevision,
+    revise_formal_decision,
+)
+from govoplan_decisions.backend.db.models import FormalDecisionRevision
+
+
+class DecisionStoreError(ValueError):
+    pass
+
+
+class SqlDecisionRegistry:
+    def get_decision(
+        self,
+        session: object,
+        principal: object,
+        *,
+        reference: InstitutionalReference,
+    ) -> FormalDecision | None:
+        tenant_id = _principal_tenant(principal)
+        if reference.kind != "decision" or reference.tenant_id != tenant_id:
+            raise InstitutionalContextError(
+                "Decision lookup requires a same-tenant Decision reference."
+            )
+        query = _session(session).query(FormalDecisionRevision).filter(
+            FormalDecisionRevision.tenant_id == tenant_id,
+            FormalDecisionRevision.decision_id == reference.object_id,
+        )
+        if reference.version is None:
+            query = query.filter(FormalDecisionRevision.superseded_at.is_(None))
+        else:
+            query = query.filter(FormalDecisionRevision.revision == reference.version)
+        row = query.order_by(FormalDecisionRevision.recorded_at.desc()).first()
+        return _decision_from_row(row) if row is not None else None
+
+    def record_decision(
+        self,
+        session: object,
+        principal: object,
+        *,
+        decision: FormalDecision,
+        expected_revision: str | None = None,
+    ) -> FormalDecision:
+        typed_session = _session(session)
+        tenant_id = _principal_tenant(principal)
+        _validate_decision(decision, tenant_id=tenant_id)
+        payload = decision.to_dict(include_protected=True)
+        replay = (
+            typed_session.query(FormalDecisionRevision)
+            .filter(
+                FormalDecisionRevision.tenant_id == tenant_id,
+                FormalDecisionRevision.decision_id == decision.reference.object_id,
+                FormalDecisionRevision.revision == decision.temporal.revision,
+            )
+            .one_or_none()
+        )
+        if replay is not None:
+            if replay.payload != payload:
+                raise DecisionStoreError(
+                    "A different Decision payload already uses this revision."
+                )
+            return _decision_from_row(replay)
+
+        current_row = _current_row(
+            typed_session,
+            tenant_id=tenant_id,
+            decision_id=decision.reference.object_id,
+            lock=True,
+        )
+        _validate_temporal(decision.temporal)
+        if current_row is None:
+            if expected_revision is not None:
+                raise DecisionStoreError(
+                    "Decision revision conflict: no current revision exists."
+                )
+        else:
+            current = _decision_from_row(current_row)
+            try:
+                revised = revise_formal_decision(
+                    current,
+                    expected_revision=expected_revision or "",
+                    temporal=decision.temporal,
+                    state=decision.state,
+                    operative_result=decision.operative_result,
+                    reasoning=decision.reasoning,
+                    conditions=decision.conditions,
+                    requested_effects=decision.requested_effects,
+                    observed_effects=decision.observed_effects,
+                    delivery_refs=decision.delivery_refs,
+                    publication_refs=decision.publication_refs,
+                    remedy_refs=decision.remedy_refs,
+                    review_refs=decision.review_refs,
+                    assurance_level=decision.assurance_level,
+                    automation_preparation_refs=decision.automation_preparation_refs,
+                )
+            except InstitutionalContextError as exc:
+                raise DecisionStoreError(str(exc)) from exc
+            if revised != decision:
+                raise DecisionStoreError(
+                    "Decision authority, subjects, facts, and legal bases cannot be rewritten by a lifecycle revision."
+                )
+            current_row.superseded_at = decision.temporal.recorded_at
+
+        row = FormalDecisionRevision(
+            tenant_id=tenant_id,
+            decision_id=decision.reference.object_id,
+            revision=decision.temporal.revision,
+            previous_revision_id=current_row.id if current_row is not None else None,
+            decision_type=decision.decision_type,
+            state=decision.state,
+            valid_from=decision.temporal.valid_from,
+            valid_to=decision.temporal.valid_to,
+            recorded_at=_recorded_at(decision.temporal),
+            payload=payload,
+            created_by=_principal_actor(principal),
+        )
+        typed_session.add(row)
+        typed_session.flush()
+        return _decision_from_row(row)
+
+
+def list_decisions(
+    session: Session,
+    principal: object,
+    *,
+    state: str | None = None,
+    decision_type: str | None = None,
+    limit: int = 100,
+) -> tuple[FormalDecision, ...]:
+    tenant_id = _principal_tenant(principal)
+    if not 1 <= limit <= 200:
+        raise DecisionStoreError("Decision list limit must be between 1 and 200.")
+    query = session.query(FormalDecisionRevision).filter(
+        FormalDecisionRevision.tenant_id == tenant_id,
+        FormalDecisionRevision.superseded_at.is_(None),
+    )
+    if state:
+        query = query.filter(FormalDecisionRevision.state == state)
+    if decision_type:
+        query = query.filter(FormalDecisionRevision.decision_type == decision_type)
+    rows = query.order_by(FormalDecisionRevision.recorded_at.desc()).limit(limit).all()
+    return tuple(_decision_from_row(row) for row in rows)
+
+
+def decision_from_mapping(value: Mapping[str, object]) -> FormalDecision:
+    try:
+        return FormalDecision.from_mapping(value)
+    except InstitutionalContextError as exc:
+        raise DecisionStoreError(str(exc)) from exc
+
+
+def reference_from_mapping(value: Mapping[str, object]) -> InstitutionalReference:
+    try:
+        return InstitutionalReference.from_mapping(value)
+    except InstitutionalContextError as exc:
+        raise DecisionStoreError(str(exc)) from exc
+
+
+def _current_row(session: Session, *, tenant_id: str, decision_id: str, lock: bool) -> FormalDecisionRevision | None:
+    query = session.query(FormalDecisionRevision).filter(
+        FormalDecisionRevision.tenant_id == tenant_id,
+        FormalDecisionRevision.decision_id == decision_id,
+        FormalDecisionRevision.superseded_at.is_(None),
+    )
+    if lock:
+        query = query.with_for_update()
+    return query.one_or_none()
+
+
+def _decision_from_row(row: FormalDecisionRevision) -> FormalDecision:
+    payload: dict[str, Any] = dict(row.payload)
+    superseded_at = _datetime_text(row.superseded_at)
+    temporal = dict(payload.get("temporal") or {})
+    temporal["superseded_at"] = superseded_at
+    payload["temporal"] = temporal
+    authority = dict(payload.get("authority_context") or {})
+    authority_temporal = dict(authority.get("temporal") or {})
+    authority_temporal["superseded_at"] = superseded_at
+    authority["temporal"] = authority_temporal
+    payload["authority_context"] = authority
+    return FormalDecision.from_mapping(payload)
+
+
+def _validate_decision(decision: FormalDecision, *, tenant_id: str) -> None:
+    if decision.reference.owner_module != "decisions":
+        raise DecisionStoreError("Formal Decisions persisted in the registry must be owned by Decisions.")
+    if decision.reference.tenant_id != tenant_id:
+        raise DecisionStoreError("Formal Decisions cannot cross tenants.")
+    if decision.reference.version != decision.temporal.revision:
+        raise DecisionStoreError("Decision reference version must match its temporal revision.")
+    if decision.temporal.superseded_at is not None:
+        raise DecisionStoreError("Clients cannot set Decision superseded_at.")
+
+
+def _validate_temporal(temporal: TemporalRevision) -> None:
+    _recorded_at(temporal)
+    if not str(temporal.change_reason or "").strip():
+        raise DecisionStoreError("A Decision revision requires recorded_at and change_reason.")
+
+
+def _recorded_at(temporal: TemporalRevision) -> datetime:
+    if temporal.recorded_at is None:
+        raise DecisionStoreError("A Decision revision requires recorded_at.")
+    return temporal.recorded_at
+
+
+def _principal_tenant(principal: object) -> str:
+    tenant_id = str(getattr(principal, "tenant_id", "") or "").strip()
+    if not tenant_id:
+        raise InstitutionalContextError("Decision operations require a tenant-bound principal.")
+    return tenant_id
+
+
+def _principal_actor(principal: object) -> str | None:
+    for name in ("account_id", "identity_id", "membership_id"):
+        value = str(getattr(principal, name, "") or "").strip()
+        if value:
+            return value
+    return None
+
+
+def _session(value: object) -> Session:
+    if not hasattr(value, "query"):
+        raise InstitutionalContextError("Decision registry requires a database session.")
+    return value  # type: ignore[return-value]
+
+
+def _datetime_text(value: datetime | None) -> str | None:
+    if value is None:
+        return None
+    if value.tzinfo is None:
+        value = value.replace(tzinfo=UTC)
+    return value.isoformat()
+
+
+__all__ = ["DecisionStoreError", "SqlDecisionRegistry", "decision_from_mapping", "list_decisions", "reference_from_mapping"]

src/govoplan_decisions/py.typed

@@ -0,0 +1 @@
+