jarca-ledger-mcp/docs/project-structure.md

Jarca Ledger MCP Project Structure

• Baseline Mode: observed
• Baseline Seed: .stage-pilot/bootstrap/baseline.yaml
• Status: draft
• Owner: Jarca / project maintainer
• Last Updated (KST): 2026-07-07
• Source Discovery / Batch: bootstrap-baseline, BAT-006, BAT-007, BAT-010, BAT-012, BAT-013, BAT-014, dcy-013/BAT-015

Project Summary

• Jarca 가계부 전용 MCP 서버와 Streamlit 대시보드로 계좌/카드 거래, 예산, 분류 규칙, import, 자산/스냅샷, 현금흐름 분석을 SQLite에 저장하고 운영한다.

Primary Domain

• Korean household finance ledger, reconciliation, and household asset tracking

Tech Stack

• Python >=3.11
• FastMCP / MCP server (stdio and streamable-http)
• SQLite
• Streamlit
• pandas / plotly
• PyMuPDF, openpyxl, msoffcrypto-tool
• pytest
• ruff

Primary Runtime

• Type: mixed
• Planned Entry Points:
  • jarca-ledger-mcp :: MCP stdio server for local Hermes Agent tools and streamable-http server when configured by env.
  • jarca-ledger Docker container :: independent Streamable HTTP MCP service on :8000/mcp.
  • dashboard/app.py :: Streamlit dashboard for local ledger operations.
  • pytest :: Regression test entry point.

Purpose

• This document is the current repository and package structure baseline.
• It is a cross-cutting reference document for Discovery, REQ, Batch Design, Batch Verification, and implementation updates.

Scope

• Covers top-level repository layout and package/module boundaries.
• Does not duplicate detailed business rules, acceptance criteria, or implementation-only function signatures.

Top-Level Structure

jarca-ledger-mcp/
├── README.md
├── Dockerfile
├── docker-compose.yml
├── .dockerignore
├── pyproject.toml
├── uv.lock
├── .env.example
├── .github/
│   └── workflows/
│       └── ci.yml
├── dashboard/
│   └── app.py
├── jarca_ledger_mcp/
│   ├── __init__.py
│   ├── service.py                  # compatibility facade
│   ├── db.py                       # compatibility shim
│   ├── server.py                   # compatibility shim / CLI entrypoint
│   ├── application/
│   │   ├── __init__.py
│   │   ├── shared.py
│   │   ├── system_services.py
│   │   ├── asset_account_services.py
│   │   ├── assets_service.py
│   │   ├── transaction_report_services.py
│   │   ├── import_transfer_services.py
│   │   ├── imports_service.py
│   │   ├── cross_transfer_service.py
│   │   ├── reconciliation_service.py
│   │   ├── categorization_services.py
│   │   └── uncategorized_workbench_service.py
│   ├── infrastructure/
│   │   ├── parsers/
│   │   │   ├── __init__.py
│   │   │   ├── kb_bank_pdf.py
│   │   │   ├── toss_bank_pdf.py
│   │   │   ├── toss_securities_pdf.py
│   │   │   └── seoulpay_xlsx.py
│   │   └── sqlite/
│   │       ├── __init__.py
│   │       ├── connection.py
│   │       ├── schema.py
│   │       └── migrations.py
│   ├── adapters/
│   │   ├── mcp/
│   │   │   ├── tool_contracts.py
│   │   │   └── server.py
│   │   └── streamlit/
│   │       ├── __init__.py
│   │       ├── overview_gateway.py
│   │       ├── assets_gateway.py
│   │       ├── transactions_gateway.py
│   │       ├── categorization_gateway.py
│   │       ├── transfers_gateway.py
│   │       ├── imports_gateway.py
│   │       ├── accounts_gateway.py
│   │       ├── reconciliation_gateway.py
│   │       └── service_gateway.py
│   ├── kb_bank_pdf.py
│   ├── toss_bank_pdf.py
│   ├── toss_securities_pdf.py
│   └── seoulpay_xlsx.py
├── tests/
│   ├── contract_snapshots/
│   │   └── response_contract_v1_0.json
│   ├── test_contract_regression.py
│   ├── test_mcp_http_runtime.py
│   ├── test_dashboard_app.py
│   ├── test_service.py
│   ├── test_asset_snapshots.py
│   ├── test_categorization.py
│   ├── test_category_rule_filters.py
│   ├── test_cross_account_transfer_matching.py
│   ├── test_kb_bank_pdf.py
│   ├── test_toss_securities_pdf.py
│   ├── test_seoulpay_xlsx.py
│   └── test_ledger_categories.py
├── scripts/
│   ├── ci_fixture_db.py
│   ├── ci_dashboard_http_smoke.py
│   ├── ci_db_safety_smoke.py
│   ├── ledger_restore_smoke.py
│   └── streamlit_browser_evidence.py
├── docs/
│   ├── discovery/
│   ├── srs/
│   ├── batches/
│   ├── runbooks/
│   │   └── docker-network-mcp-deploy.md
│   ├── releases/
│   ├── project-structure.md
│   ├── runtime-flows.md
│   ├── interface-contract.md
│   └── data-model.md
└── .stage-pilot/
    └── bootstrap/baseline.yaml

Package / Module Responsibilities

• jarca_ledger_mcp/service.py
  • Legacy-compatible top-level service facade. Public call sites continue to import from here while implementation lives in application modules.
• jarca_ledger_mcp/db.py
  • Legacy-compatible top-level DB shim. Public call sites continue to import init_db, db, resolve_db_path from here.
• jarca_ledger_mcp/server.py
  • Legacy-compatible MCP entrypoint shim that delegates to adapters.mcp.server.
• jarca_ledger_mcp/application/shared.py
  • Shared helpers, validation, KST clock, dedupe policy, parser seam imports, and cross-domain constants.
• jarca_ledger_mcp/application/system_services.py
  • Health/status/backup/account create-list/update and persistence-adjacent service behavior.
• jarca_ledger_mcp/application/asset_account_services.py
  • Legacy-compatible asset/account facade that preserves older import paths while delegating asset ownership to assets_service.py and account mutation to write services.
• jarca_ledger_mcp/application/assets_service.py
  • Manual asset CRUD, snapshot close/report, liquidity, and net-worth workflow ownership.
• jarca_ledger_mcp/application/transaction_report_services.py
  • Transaction CRUD, budgets, monthly/category/fixed-cost/investable cashflow reports, with reconciliation delegated to reconciliation_service.py.
• jarca_ledger_mcp/application/import_transfer_services.py
  • Legacy-compatible import/transfer facade that preserves prior import paths while delegating to imports_service.py and cross_transfer_service.py.
• jarca_ledger_mcp/application/imports_service.py
  • Import preview/import/rollback orchestration and import batch workflow ownership.
• jarca_ledger_mcp/application/cross_transfer_service.py
  • Cross-account/self-transfer/cancel-original matching workflow ownership.
• jarca_ledger_mcp/application/reconciliation_service.py
  • Manual/partial-import balance reconciliation preview ownership.
• jarca_ledger_mcp/application/categorization_services.py
  • Category rules, categorization preview/apply, ledger categories, and compatibility delegation to uncategorized_workbench_service.py.
• jarca_ledger_mcp/application/uncategorized_workbench_service.py
  • Uncategorized inbox/workbench queries and recommendation-apply workflow ownership.
• jarca_ledger_mcp/infrastructure/parsers/*
  • Import parser seam that keeps file-source parsing under infrastructure while preserving legacy top-level parser modules.
• jarca_ledger_mcp/infrastructure/sqlite/connection.py
  • DB path resolution, sqlite connection setup, context manager semantics.
• jarca_ledger_mcp/infrastructure/sqlite/schema.py
  • Schema version, DDL, additive column definitions.
• jarca_ledger_mcp/infrastructure/sqlite/migrations.py
  • Additive/idempotent migration routines and DB initialization.
• jarca_ledger_mcp/adapters/mcp/tool_contracts.py
  • Narrow MCP adapter contract surface that re-exports only the public tool callables consumed by the FastMCP server.
• jarca_ledger_mcp/adapters/mcp/server.py
  • FastMCP tool registration layer that depends on tool_contracts.py instead of broad direct service imports. Runtime transport is configurable: stdio by default, or streamable-http through JARCA_MCP_TRANSPORT=streamable-http with host/port/path env settings.
• jarca_ledger_mcp/adapters/streamlit/service_gateway.py
  • Compatibility aggregator over page/domain gateway modules.
• jarca_ledger_mcp/adapters/streamlit/*_gateway.py
  • Page/domain-sized dashboard service surfaces (overview, assets, transactions, categorization, transfers, imports, accounts, reconciliation).
• Parser modules (kb_bank_pdf.py, toss_bank_pdf.py, toss_securities_pdf.py, seoulpay_xlsx.py)
  • Source-file parsing and preview conversion only.
• dashboard/app.py
  • Streamlit operator UI for the operations hub summary, 자산/마감, 거래내역, 확인필요 큐, 미분류, 분류 규칙, 카테고리, 계좌, Import pages, wired through page/domain gateways instead of a flat broad service namespace.
• tests/
  • Regression tests for facade compatibility, service behavior, parser behavior, categorization, transfer matching, MCP contract compatibility, and Streamlit AppTest smoke.
• .github/workflows/ci.yml
  • GitHub Actions workflow for pull_request, push to main, and workflow_dispatch; stable required gate jobs are pytest-regression, dashboard-app-test, dashboard-http-smoke, db-safety-smoke, contract-regression, and lint.
• scripts/ci_fixture_db.py
  • Synthetic fixture DB builder for CI/AppTest/browser smoke.
• scripts/ci_dashboard_http_smoke.py
  • Synthetic-db Streamlit readiness smoke wrapper.
• scripts/ci_db_safety_smoke.py
  • Synthetic-db backup/restore safety smoke wrapper.
• scripts/streamlit_browser_evidence.py
  • Local browser evidence helper using synthetic/validation DBs only.
• scripts/ledger_restore_smoke.py
  • Script-only restore smoke helper; restore remains outside the MCP tool surface.
• Dockerfile / docker-compose.yml
  • Build and run the independent jarca-ledger Docker service. Compose fixes container_name=jarca-ledger, restart=unless-stopped, port 8000:8000, and bind mount /volume1/docker/jarca-ledger/data:/data.
• docs/runbooks/docker-network-mcp-deploy.md
  • Operator runbook for building, starting, and verifying the Docker Streamable HTTP MCP deployment and DB path.

Dependency Rules

• adapters/mcp/server.py should remain a thin tool adapter and delegate business logic to service.py facade/application modules.
• dashboard/app.py should call adapters/streamlit/service_gateway.py, not giant implementation modules directly.
• service.py / db.py / server.py shims preserve public import paths while new implementation lives under application/, infrastructure/, adapters/.
• Parser modules should parse source documents into structured records and avoid direct UI responsibilities.
• DB schema migrations should be additive and idempotent by default.

Shared Boundaries

• cashflow_kind is the boundary between actual household income/expense and account movement/exclusion semantics.
• liquidity_bucket is the account/manual-asset boundary for liquidity/composition/debt/net-worth views.
• Import evidence fields (source, external_id, raw_summary, raw_payload, counterparty, import_batch_id) are audit boundaries and should be preserved.
• Manual reconciliation is represented through memo tags and narrow transaction updates, not broad rewrites.
• Browser evidence artifacts are generated from synthetic/validation DBs and should not embed real financial identifiers or raw source payloads.
• CI gate fixtures are generated at runtime under temp space by scripts/ci_fixture_db.py; CI/AppTest/browser smoke must not read the default operating DB path.

Current Gaps / Planned Changes

• Application modules are now separated by phase-0~3 domain seams, but deeper repository/use-case split remains future Phase 4+ work.
• Streamlit now uses page/domain gateways; deeper presenter/view-model extraction remains future work.
• Network MCP over FastMCP streamable-http is now available for internal Synology operation; broader HTTP/REST business API, external exposure, reverse proxy/TLS/auth, and remote ops re-architecture remain future work.

Update Triggers

• Update this document when package boundaries change.
• Update this document when new top-level runtime or domain modules are added.
• Update this document when a batch changes the approved structure baseline.

Change Log

• 2026-06-26 22:24 KST: Created by bootstrap-baseline from repository observation.
• 2026-06-29 KST: REQ-004/BAT-004 기준으로 scripts/streamlit_browser_evidence.py 및 browser evidence artifact 구조 추가.
• 2026-06-29 KST: REQ-005/BAT-005 기준으로 dashboard operations hub와 service asset liquidity aggregation 책임 추가.
• 2026-06-30 KST: REQ-006/BAT-006 기준으로 GitHub Actions CI workflow, synthetic fixture DB builder, AppTest/HTTP/DB safety smoke wrappers 추가.
• 2026-06-30 KST: REQ-007/REQ-008/BAT-007 기준으로 MCP response contract snapshot/test 위치와 required-check job 계약 추가.
• 2026-07-03 KST: REQ-013/REQ-014/BAT-010 기준으로 application / infrastructure / adapter layering, compatibility facade/shim, Streamlit gateway 구조를 반영했다.
• 2026-07-03 KST: REQ-016/REQ-017/REQ-018 및 BAT-012/BAT-013/BAT-014 기준으로 import/advanced owning services, parser seam, MCP contract helper, page/domain Streamlit gateways를 반영했다.
• 2026-07-07 KST: REQ-019/BAT-015 기준으로 Dockerfile/compose, jarca-ledger independent container, streamable-http MCP endpoint, Synology volume /volume1/docker/jarca-ledger/data, and Docker deployment runbook을 반영했다.