feat: add monthly settlement read model

Implements REQ-022 monthly settlement read-model foundation.

jarca_ledger_mcp/application/__init__.py

@@ -9,6 +9,7 @@ from . import categorization_services as _categorization_services
 from . import cross_transfer_service as _cross_transfer_service
 from . import imports_service as _imports_service
 from . import import_transfer_services as _import_transfer_services
+from . import monthly_settlement_service as _monthly_settlement_service
 from . import reconciliation_service as _reconciliation_service
 from . import shared as shared
 from . import system_services as _system_services
@@ -27,6 +28,7 @@ _EXPORT_MODULES = (
     _cross_transfer_service,
     _imports_service,
     _import_transfer_services,
+    _monthly_settlement_service,
     _reconciliation_service,
     _system_services,
     _transactions_write_services,

jarca_ledger_mcp/application/monthly_settlement_service.py

@@ -0,0 +1,113 @@
+from __future__ import annotations
+
+from .assets_service import get_asset_snapshot_report
+from .imports_service import list_ledger_import_batches
+from .reconciliation_service import get_balance_reconciliation_report
+from .review_decision_service import get_review_operating_indicators
+from .shared import Any, fail, normalize_month, normalize_snapshot_at, ok
+from .transaction_report_services import get_budget_vs_actual_report, get_monthly_cashflow_report
+
+
+def _month_end_date(month: str) -> str:
+    return normalize_snapshot_at(month, default_now=False)[:10]
+
+
+def _budget_overrun_count(budget_report: dict[str, Any]) -> int:
+    return sum(1 for item in budget_report.get("items", []) if item.get("status") == "over")
+
+
+def _unresolved_blocker_summary(review_report: dict[str, Any], reconciliation_report: dict[str, Any]) -> dict[str, Any]:
+    indicators = review_report.get("indicators", {}) if review_report.get("success") else {}
+    reconciliation_items = reconciliation_report.get("items", []) if reconciliation_report.get("success") else []
+    reconciliation_attention_count = sum(1 for item in reconciliation_items if item.get("status") != "OK")
+    counts = {
+        "uncategorized_recommendation_backlog": int(indicators.get("uncategorized_recommendation_backlog") or 0),
+        "pending_review_count": int(indicators.get("pending_review_count") or 0),
+        "held_recheck_count": int(indicators.get("held_recheck_count") or 0),
+        "unreconciled_account_count": int(indicators.get("unreconciled_account_count") or 0),
+        "reconciliation_attention_count": reconciliation_attention_count,
+    }
+    return {"count": sum(counts.values()), "counts": counts}
+
+
+def _source_coverage(
+    cashflow_report: dict[str, Any],
+    budget_report: dict[str, Any],
+    review_report: dict[str, Any],
+    reconciliation_report: dict[str, Any],
+    import_report: dict[str, Any],
+    asset_report: dict[str, Any],
+) -> dict[str, Any]:
+    latest_import = (import_report.get("import_batches") or [None])[0]
+    return {
+        "cashflow": {"success": bool(cashflow_report.get("success")), "source": "transactions"},
+        "budget": {
+            "success": bool(budget_report.get("success")),
+            "budget_count": len(budget_report.get("items", [])),
+        },
+        "review": {
+            "success": bool(review_report.get("success")),
+            "indicators": review_report.get("indicators", {}) if review_report.get("success") else {},
+        },
+        "reconciliation": {
+            "success": bool(reconciliation_report.get("success")),
+            "item_count": int(reconciliation_report.get("count") or 0),
+        },
+        "imports": {
+            "success": bool(import_report.get("success")),
+            "recent_batch_count": int(import_report.get("count") or 0),
+            "latest_imported_at": latest_import.get("imported_at") if isinstance(latest_import, dict) else "",
+        },
+        "assets": {
+            "success": bool(asset_report.get("success")),
+            "basis_date": asset_report.get("basis_date", ""),
+            "source": asset_report.get("source", ""),
+            "is_closed_snapshot": bool(asset_report.get("is_closed_snapshot", False)),
+            "net_worth": asset_report.get("net_worth"),
+        },
+    }
+
+
+def get_monthly_settlement_summary(month: str = "", db_path: str | None = None) -> dict[str, Any]:
+    """Return the read-only monthly settlement summary foundation for dashboard/MCP consumers."""
+    try:
+        selected_month = normalize_month(month)
+        basis_date = _month_end_date(selected_month)
+    except Exception as exc:
+        return fail("validation_error", str(exc))
+
+    cashflow_report = get_monthly_cashflow_report(selected_month, db_path=db_path)
+    if not cashflow_report.get("success"):
+        return cashflow_report
+    budget_report = get_budget_vs_actual_report(selected_month, db_path=db_path)
+    review_report = get_review_operating_indicators(db_path=db_path)
+    reconciliation_report = get_balance_reconciliation_report(db_path=db_path)
+    import_report = list_ledger_import_batches(limit=5, db_path=db_path)
+    asset_report = get_asset_snapshot_report(basis_date=basis_date, db_path=db_path)
+
+    unresolved_blockers = _unresolved_blocker_summary(review_report, reconciliation_report)
+    return ok(
+        selected_month=selected_month,
+        month=selected_month,
+        basis_date=basis_date,
+        actual_income=int(cashflow_report.get("income") or 0),
+        actual_expense=int(cashflow_report.get("expenses") or 0),
+        net_cashflow=int(cashflow_report.get("net_cashflow") or 0),
+        savings_rate=cashflow_report.get("savings_rate"),
+        budget_overrun_count=_budget_overrun_count(budget_report),
+        unresolved_blocker_count=int(unresolved_blockers["count"]),
+        unresolved_blockers=unresolved_blockers,
+        source_coverage=_source_coverage(
+            cashflow_report,
+            budget_report,
+            review_report,
+            reconciliation_report,
+            import_report,
+            asset_report,
+        ),
+        reports={
+            "cashflow": cashflow_report,
+            "budget": budget_report,
+        },
+        read_only=True,
+    )

jarca_ledger_mcp/service.py

@@ -12,6 +12,7 @@ from .application import categorization_services as _categorization_services
 from .application import cross_transfer_service as _cross_transfer_service
 from .application import imports_service as _imports_service
 from .application import import_transfer_services as _import_transfer_services
+from .application import monthly_settlement_service as _monthly_settlement_service
 from .application import reconciliation_service as _reconciliation_service
 from .application import review_decision_service as _review_decision_service
 from .application import shared as _shared
@@ -34,6 +35,7 @@ _PROXY_MODULES = (
     _transaction_report_services,
     _reconciliation_service,
     _review_decision_service,
+    _monthly_settlement_service,
     _imports_service,
     _import_transfer_services,
     _cross_transfer_service,