From 702fdccf0afaa3900685169d573232eb441a0e28 Mon Sep 17 00:00:00 2001
From: Felix Martin <mail@felixm.de>
Date: Sat, 20 Dec 2025 15:33:08 -0500
Subject: [PATCH] Update ledgerai to read existing transactions from beancount
 file

---
 .gitignore            |   1 +
 poetry.lock           | 441 ++++++------------------------------------
 pyproject.toml        |  29 ++-
 src/toldg/__main__.py |  80 +++++---
 src/toldg/fzf.py      |   9 +-
 src/toldg/models.py   |   1 -
 src/toldg/predict.py  |  14 +-
 src/toldg/process.py  |  17 +-
 src/toldg/train.py    |   1 -
 src/toldg/utils.py    |  16 +-
 src/toldg/write.py    |   6 +-
 11 files changed, 154 insertions(+), 461 deletions(-)

diff --git a/.gitignore b/.gitignore
index 28b315a..49c520a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 # ---> Python
+uv.lock
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
diff --git a/poetry.lock b/poetry.lock
index ef19a1c..8d859e2 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -26,7 +26,6 @@ files = [
 
 [package.dependencies]
 idna = ">=2.8"
-typing_extensions = {version = ">=4.5", markers = "python_version < \"3.13\""}
 
 [package.extras]
 trio = ["trio (>=0.31.0) ; python_version < \"3.10\"", "trio (>=0.32.0) ; python_version >= \"3.10\""]
@@ -159,57 +158,6 @@ charset-normalizer = ["charset-normalizer"]
 html5lib = ["html5lib"]
 lxml = ["lxml"]
 
-[[package]]
-name = "black"
-version = "25.12.0"
-description = "The uncompromising code formatter."
-optional = false
-python-versions = ">=3.10"
-groups = ["dev"]
-files = [
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-    {file = "black-25.12.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:546eecfe9a3a6b46f9d69d8a642585a6eaf348bcbbc4d87a19635570e02d9f4a"},
-    {file = "black-25.12.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:17dcc893da8d73d8f74a596f64b7c98ef5239c2cd2b053c0f25912c4494bf9ea"},
-    {file = "black-25.12.0-cp310-cp310-win_amd64.whl", hash = "sha256:09524b0e6af8ba7a3ffabdfc7a9922fb9adef60fed008c7cd2fc01f3048e6e6f"},
-    {file = "black-25.12.0-cp310-cp310-win_arm64.whl", hash = "sha256:b162653ed89eb942758efeb29d5e333ca5bb90e5130216f8369857db5955a7da"},
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-    {file = "black-25.12.0-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:1a2f578ae20c19c50a382286ba78bfbeafdf788579b053d8e4980afb079ab9be"},
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-    {file = "black-25.12.0-cp311-cp311-win_arm64.whl", hash = "sha256:51e267458f7e650afed8445dc7edb3187143003d52a1b710c7321aef22aa9655"},
-    {file = "black-25.12.0-cp312-cp312-macosx_10_13_x86_64.whl", hash = "sha256:31f96b7c98c1ddaeb07dc0f56c652e25bdedaac76d5b68a059d998b57c55594a"},
-    {file = "black-25.12.0-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:05dd459a19e218078a1f98178c13f861fe6a9a5f88fc969ca4d9b49eb1809783"},
-    {file = "black-25.12.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:c1f68c5eff61f226934be6b5b80296cf6939e5d2f0c2f7d543ea08b204bfaf59"},
-    {file = "black-25.12.0-cp312-cp312-win_amd64.whl", hash = "sha256:274f940c147ddab4442d316b27f9e332ca586d39c85ecf59ebdea82cc9ee8892"},
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-    {file = "black-25.12.0-cp313-cp313-macosx_10_13_x86_64.whl", hash = "sha256:a05ddeb656534c3e27a05a29196c962877c83fa5503db89e68857d1161ad08a5"},
-    {file = "black-25.12.0-cp313-cp313-macosx_11_0_arm64.whl", hash = "sha256:9ec77439ef3e34896995503865a85732c94396edcc739f302c5673a2315e1e7f"},
-    {file = "black-25.12.0-cp313-cp313-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:0e509c858adf63aa61d908061b52e580c40eae0dfa72415fa47ac01b12e29baf"},
-    {file = "black-25.12.0-cp313-cp313-win_amd64.whl", hash = "sha256:252678f07f5bac4ff0d0e9b261fbb029fa530cfa206d0a636a34ab445ef8ca9d"},
-    {file = "black-25.12.0-cp313-cp313-win_arm64.whl", hash = "sha256:bc5b1c09fe3c931ddd20ee548511c64ebf964ada7e6f0763d443947fd1c603ce"},
-    {file = "black-25.12.0-cp314-cp314-macosx_10_15_x86_64.whl", hash = "sha256:0a0953b134f9335c2434864a643c842c44fba562155c738a2a37a4d61f00cad5"},
-    {file = "black-25.12.0-cp314-cp314-macosx_11_0_arm64.whl", hash = "sha256:2355bbb6c3b76062870942d8cc450d4f8ac71f9c93c40122762c8784df49543f"},
-    {file = "black-25.12.0-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:9678bd991cc793e81d19aeeae57966ee02909877cb65838ccffef24c3ebac08f"},
-    {file = "black-25.12.0-cp314-cp314-win_amd64.whl", hash = "sha256:97596189949a8aad13ad12fcbb4ae89330039b96ad6742e6f6b45e75ad5cfd83"},
-    {file = "black-25.12.0-cp314-cp314-win_arm64.whl", hash = "sha256:778285d9ea197f34704e3791ea9404cd6d07595745907dd2ce3da7a13627b29b"},
-    {file = "black-25.12.0-py3-none-any.whl", hash = "sha256:48ceb36c16dbc84062740049eef990bb2ce07598272e673c17d1a7720c71c828"},
-    {file = "black-25.12.0.tar.gz", hash = "sha256:8d3dd9cea14bff7ddc0eb243c811cdb1a011ebb4800a5f0335a01a68654796a7"},
-]
-
-[package.dependencies]
-click = ">=8.0.0"
-mypy-extensions = ">=0.4.3"
-packaging = ">=22.0"
-pathspec = ">=0.9.0"
-platformdirs = ">=2"
-pytokens = ">=0.3.0"
-
-[package.extras]
-colorama = ["colorama (>=0.4.3)"]
-d = ["aiohttp (>=3.10)"]
-jupyter = ["ipython (>=7.8.0)", "tokenize-rt (>=3.2.0)"]
-uvloop = ["uvloop (>=0.15.2)"]
-
 [[package]]
 name = "blinker"
 version = "1.9.0"
@@ -222,18 +170,6 @@ files = [
     {file = "blinker-1.9.0.tar.gz", hash = "sha256:b4ce2265a7abece45e7cc896e98dbebe6cead56bcf805a3d23136d145f5445bf"},
 ]
 
-[[package]]
-name = "cfgv"
-version = "3.5.0"
-description = "Validate configuration and produce human readable error messages."
-optional = false
-python-versions = ">=3.10"
-groups = ["dev"]
-files = [
-    {file = "cfgv-3.5.0-py2.py3-none-any.whl", hash = "sha256:a8dc6b26ad22ff227d2634a65cb388215ce6cc96bbcc5cfde7641ae87e8dacc0"},
-    {file = "cfgv-3.5.0.tar.gz", hash = "sha256:d5b1034354820651caa73ede66a6294d6e95c1b00acc5e9b098e917404669132"},
-]
-
 [[package]]
 name = "chardet"
 version = "5.2.0"
@@ -271,7 +207,7 @@ version = "8.3.1"
 description = "Composable command line interface toolkit"
 optional = false
 python-versions = ">=3.10"
-groups = ["main", "dev"]
+groups = ["main"]
 files = [
     {file = "click-8.3.1-py3-none-any.whl", hash = "sha256:981153a64e25f12d547d3426c367a4857371575ee7ad18df2a6183ab0545b2a6"},
     {file = "click-8.3.1.tar.gz", hash = "sha256:12ff4785d337a1bb490bb7e9c2b1ee5da3112e94a8622f26a6c77f5d2fc6842a"},
@@ -286,24 +222,12 @@ version = "0.4.6"
 description = "Cross-platform colored terminal text."
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
-groups = ["main", "dev"]
+groups = ["main"]
+markers = "platform_system == \"Windows\""
 files = [
     {file = "colorama-0.4.6-py2.py3-none-any.whl", hash = "sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6"},
     {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
 ]
-markers = {main = "platform_system == \"Windows\"", dev = "platform_system == \"Windows\" or sys_platform == \"win32\""}
-
-[[package]]
-name = "distlib"
-version = "0.4.0"
-description = "Distribution utilities"
-optional = false
-python-versions = "*"
-groups = ["dev"]
-files = [
-    {file = "distlib-0.4.0-py2.py3-none-any.whl", hash = "sha256:9659f7d87e46584a30b5780e43ac7a2143098441670ff0a49d5f9034c54a6c16"},
-    {file = "distlib-0.4.0.tar.gz", hash = "sha256:feec40075be03a04501a973d81f633735b4b69f98b05450592310c0f401a4e0d"},
-]
 
 [[package]]
 name = "fava"
@@ -336,18 +260,6 @@ Werkzeug = ">=2.2,<4"
 [package.extras]
 excel = ["pyexcel (>=0.5)", "pyexcel-ods3 (>=0.5)", "pyexcel-xlsx (>=0.5)"]
 
-[[package]]
-name = "filelock"
-version = "3.20.0"
-description = "A platform independent file lock."
-optional = false
-python-versions = ">=3.10"
-groups = ["dev"]
-files = [
-    {file = "filelock-3.20.0-py3-none-any.whl", hash = "sha256:339b4732ffda5cd79b13f4e2711a31b0365ce445d95d243bb996273d072546a2"},
-    {file = "filelock-3.20.0.tar.gz", hash = "sha256:711e943b4ec6be42e1d4e6690b48dc175c822967466bb31c0c293f34334c13f4"},
-]
-
 [[package]]
 name = "flask"
 version = "3.1.2"
@@ -390,21 +302,6 @@ Flask = ">=2.0"
 Jinja2 = ">=3.1"
 pytz = ">=2022.7"
 
-[[package]]
-name = "identify"
-version = "2.6.15"
-description = "File identification library for Python"
-optional = false
-python-versions = ">=3.9"
-groups = ["dev"]
-files = [
-    {file = "identify-2.6.15-py2.py3-none-any.whl", hash = "sha256:1181ef7608e00704db228516541eb83a88a9f94433a8c80bb9b5bd54b1d81757"},
-    {file = "identify-2.6.15.tar.gz", hash = "sha256:e4f4864b96c6557ef2a1e1c951771838f4edc9df3a72ec7118b338801b11c7bf"},
-]
-
-[package.extras]
-license = ["ukkonen"]
-
 [[package]]
 name = "idna"
 version = "3.11"
@@ -420,34 +317,6 @@ files = [
 [package.extras]
 all = ["flake8 (>=7.1.1)", "mypy (>=1.11.2)", "pytest (>=8.3.2)", "ruff (>=0.6.2)"]
 
-[[package]]
-name = "iniconfig"
-version = "2.3.0"
-description = "brain-dead simple config-ini parsing"
-optional = false
-python-versions = ">=3.10"
-groups = ["dev"]
-files = [
-    {file = "iniconfig-2.3.0-py3-none-any.whl", hash = "sha256:f631c04d2c48c52b84d0d0549c99ff3859c98df65b3101406327ecc7d53fbf12"},
-    {file = "iniconfig-2.3.0.tar.gz", hash = "sha256:c76315c77db068650d49c5b56314774a7804df16fee4402c1f19d6d15d8c4730"},
-]
-
-[[package]]
-name = "isort"
-version = "6.1.0"
-description = "A Python utility / library to sort Python imports."
-optional = false
-python-versions = ">=3.9.0"
-groups = ["dev"]
-files = [
-    {file = "isort-6.1.0-py3-none-any.whl", hash = "sha256:58d8927ecce74e5087aef019f778d4081a3b6c98f15a80ba35782ca8a2097784"},
-    {file = "isort-6.1.0.tar.gz", hash = "sha256:9b8f96a14cfee0677e78e941ff62f03769a06d412aabb9e2a90487b3b7e8d481"},
-]
-
-[package.extras]
-colors = ["colorama"]
-plugins = ["setuptools"]
-
 [[package]]
 name = "itsdangerous"
 version = "2.2.0"
@@ -822,30 +691,6 @@ files = [
     {file = "more_itertools-10.8.0.tar.gz", hash = "sha256:f638ddf8a1a0d134181275fb5d58b086ead7c6a72429ad725c67503f13ba30bd"},
 ]
 
-[[package]]
-name = "mypy-extensions"
-version = "1.1.0"
-description = "Type system extensions for programs checked with the mypy type checker."
-optional = false
-python-versions = ">=3.8"
-groups = ["dev"]
-files = [
-    {file = "mypy_extensions-1.1.0-py3-none-any.whl", hash = "sha256:1be4cccdb0f2482337c4743e60421de3a356cd97508abadd57d47403e94f5505"},
-    {file = "mypy_extensions-1.1.0.tar.gz", hash = "sha256:52e68efc3284861e772bbcd66823fde5ae21fd2fdb51c62a211403730b916558"},
-]
-
-[[package]]
-name = "nodeenv"
-version = "1.9.1"
-description = "Node.js virtual environment builder"
-optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
-groups = ["dev"]
-files = [
-    {file = "nodeenv-1.9.1-py2.py3-none-any.whl", hash = "sha256:ba11c9782d29c27c70ffbdda2d7415098754709be8a7056d79a737cd901155c9"},
-    {file = "nodeenv-1.9.1.tar.gz", hash = "sha256:6ec12890a2dab7946721edbfbcd91f3319c6ccc9aec47be7c7e6b7011ee6645f"},
-]
-
 [[package]]
 name = "numpy"
 version = "2.3.5"
@@ -930,63 +775,6 @@ files = [
     {file = "numpy-2.3.5.tar.gz", hash = "sha256:784db1dcdab56bf0517743e746dfb0f885fc68d948aba86eeec2cba234bdf1c0"},
 ]
 
-[[package]]
-name = "packaging"
-version = "25.0"
-description = "Core utilities for Python packages"
-optional = false
-python-versions = ">=3.8"
-groups = ["dev"]
-files = [
-    {file = "packaging-25.0-py3-none-any.whl", hash = "sha256:29572ef2b1f17581046b3a2227d5c611fb25ec70ca1ba8554b24b0e69331a484"},
-    {file = "packaging-25.0.tar.gz", hash = "sha256:d443872c98d677bf60f6a1f2f8c1cb748e8fe762d2bf9d3148b5599295b0fc4f"},
-]
-
-[[package]]
-name = "pathspec"
-version = "0.12.1"
-description = "Utility library for gitignore style pattern matching of file paths."
-optional = false
-python-versions = ">=3.8"
-groups = ["dev"]
-files = [
-    {file = "pathspec-0.12.1-py3-none-any.whl", hash = "sha256:a0d503e138a4c123b27490a4f7beda6a01c6f288df0e4a8b79c7eb0dc7b4cc08"},
-    {file = "pathspec-0.12.1.tar.gz", hash = "sha256:a482d51503a1ab33b1c67a6c3813a26953dbdc71c31dacaef9a838c4e29f5712"},
-]
-
-[[package]]
-name = "platformdirs"
-version = "4.5.1"
-description = "A small Python package for determining appropriate platform-specific dirs, e.g. a `user data dir`."
-optional = false
-python-versions = ">=3.10"
-groups = ["dev"]
-files = [
-    {file = "platformdirs-4.5.1-py3-none-any.whl", hash = "sha256:d03afa3963c806a9bed9d5125c8f4cb2fdaf74a55ab60e5d59b3fde758104d31"},
-    {file = "platformdirs-4.5.1.tar.gz", hash = "sha256:61d5cdcc6065745cdd94f0f878977f8de9437be93de97c1c12f853c9c0cdcbda"},
-]
-
-[package.extras]
-docs = ["furo (>=2025.9.25)", "proselint (>=0.14)", "sphinx (>=8.2.3)", "sphinx-autodoc-typehints (>=3.2)"]
-test = ["appdirs (==1.4.4)", "covdefaults (>=2.3)", "pytest (>=8.4.2)", "pytest-cov (>=7)", "pytest-mock (>=3.15.1)"]
-type = ["mypy (>=1.18.2)"]
-
-[[package]]
-name = "pluggy"
-version = "1.6.0"
-description = "plugin and hook calling mechanisms for python"
-optional = false
-python-versions = ">=3.9"
-groups = ["dev"]
-files = [
-    {file = "pluggy-1.6.0-py3-none-any.whl", hash = "sha256:e920276dd6813095e9377c0bc5566d94c932c33b27a3e3945d8389c374dd4746"},
-    {file = "pluggy-1.6.0.tar.gz", hash = "sha256:7dcc130b76258d33b90f61b658791dede3486c3e6bfb003ee5c9bfb396dd22f3"},
-]
-
-[package.extras]
-dev = ["pre-commit", "tox"]
-testing = ["coverage", "pytest", "pytest-benchmark"]
-
 [[package]]
 name = "ply"
 version = "3.11"
@@ -999,25 +787,6 @@ files = [
     {file = "ply-3.11.tar.gz", hash = "sha256:00c7c1aaa88358b9c765b6d3000c6eec0ba42abca5351b095321aef446081da3"},
 ]
 
-[[package]]
-name = "pre-commit"
-version = "4.5.0"
-description = "A framework for managing and maintaining multi-language pre-commit hooks."
-optional = false
-python-versions = ">=3.10"
-groups = ["dev"]
-files = [
-    {file = "pre_commit-4.5.0-py2.py3-none-any.whl", hash = "sha256:25e2ce09595174d9c97860a95609f9f852c0614ba602de3561e267547f2335e1"},
-    {file = "pre_commit-4.5.0.tar.gz", hash = "sha256:dc5a065e932b19fc1d4c653c6939068fe54325af8e741e74e88db4d28a4dd66b"},
-]
-
-[package.dependencies]
-cfgv = ">=2.0.0"
-identify = ">=1.0.0"
-nodeenv = ">=0.11.1"
-pyyaml = ">=5.1"
-virtualenv = ">=20.10.0"
-
 [[package]]
 name = "pydantic"
 version = "2.12.5"
@@ -1180,7 +949,7 @@ version = "2.19.2"
 description = "Pygments is a syntax highlighting package written in Python."
 optional = false
 python-versions = ">=3.8"
-groups = ["main", "dev"]
+groups = ["main"]
 files = [
     {file = "pygments-2.19.2-py3-none-any.whl", hash = "sha256:86540386c03d588bb81d44bc3928634ff26449851e99741617ecb9037ee5ec0b"},
     {file = "pygments-2.19.2.tar.gz", hash = "sha256:636cb2477cec7f8952536970bc533bc43743542f70392ae026374600add5b887"},
@@ -1189,28 +958,6 @@ files = [
 [package.extras]
 windows-terminal = ["colorama (>=0.4.6)"]
 
-[[package]]
-name = "pytest"
-version = "8.4.2"
-description = "pytest: simple powerful testing with Python"
-optional = false
-python-versions = ">=3.9"
-groups = ["dev"]
-files = [
-    {file = "pytest-8.4.2-py3-none-any.whl", hash = "sha256:872f880de3fc3a5bdc88a11b39c9710c3497a547cfa9320bc3c5e62fbf272e79"},
-    {file = "pytest-8.4.2.tar.gz", hash = "sha256:86c0d0b93306b961d58d62a4db4879f27fe25513d4b969df351abdddb3c30e01"},
-]
-
-[package.dependencies]
-colorama = {version = ">=0.4", markers = "sys_platform == \"win32\""}
-iniconfig = ">=1"
-packaging = ">=20"
-pluggy = ">=1.5,<2"
-pygments = ">=2.7.2"
-
-[package.extras]
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+    {file = "ruff-0.14.10-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:59aabd2e2c4fd614d2862e7939c34a532c04f1084476d6833dddef4afab87e9f"},
+    {file = "ruff-0.14.10-py3-none-manylinux_2_31_riscv64.whl", hash = "sha256:213db2b2e44be8625002dbea33bb9c60c66ea2c07c084a00d55732689d697a7f"},
+    {file = "ruff-0.14.10-py3-none-musllinux_1_2_aarch64.whl", hash = "sha256:b914c40ab64865a17a9a5b67911d14df72346a634527240039eb3bd650e5979d"},
+    {file = "ruff-0.14.10-py3-none-musllinux_1_2_armv7l.whl", hash = "sha256:1484983559f026788e3a5c07c81ef7d1e97c1c78ed03041a18f75df104c45405"},
+    {file = "ruff-0.14.10-py3-none-musllinux_1_2_i686.whl", hash = "sha256:c70427132db492d25f982fffc8d6c7535cc2fd2c83fc8888f05caaa248521e60"},
+    {file = "ruff-0.14.10-py3-none-musllinux_1_2_x86_64.whl", hash = "sha256:5bcf45b681e9f1ee6445d317ce1fa9d6cba9a6049542d1c3d5b5958986be8830"},
+    {file = "ruff-0.14.10-py3-none-win32.whl", hash = "sha256:104c49fc7ab73f3f3a758039adea978869a918f31b73280db175b43a2d9b51d6"},
+    {file = "ruff-0.14.10-py3-none-win_amd64.whl", hash = "sha256:466297bd73638c6bdf06485683e812db1c00c7ac96d4ddd0294a338c62fdc154"},
+    {file = "ruff-0.14.10-py3-none-win_arm64.whl", hash = "sha256:e51d046cf6dda98a4633b8a8a771451107413b0f07183b2bef03f075599e44e6"},
+    {file = "ruff-0.14.10.tar.gz", hash = "sha256:9a2e830f075d1a42cd28420d7809ace390832a490ed0966fe373ba288e77aaf4"},
+]
+
 [[package]]
 name = "simplejson"
 version = "3.20.2"
@@ -1653,6 +1331,34 @@ files = [
 colorization = ["colorama"]
 parproc = ["rich"]
 
+[[package]]
+name = "ty"
+version = "0.0.4"
+description = "An extremely fast Python type checker, written in Rust."
+optional = false
+python-versions = ">=3.8"
+groups = ["main"]
+files = [
+    {file = "ty-0.0.4-py3-none-linux_armv6l.whl", hash = "sha256:5225da65a8d1defeb21ee9d74298b1b97c6cbab36e235a310c1430d9079e4b6a"},
+    {file = "ty-0.0.4-py3-none-macosx_10_12_x86_64.whl", hash = "sha256:f87770d7988f470b795a2043185082fa959dbe1979a11b4bfe20f1214d37bd6e"},
+    {file = "ty-0.0.4-py3-none-macosx_11_0_arm64.whl", hash = "sha256:ecf68b8ea48674a289d733b4786aecc259242a2d9a920b3ec8583db18c67496a"},
+    {file = "ty-0.0.4-py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:efc396d76a57e527393cae4ee8faf23b93be3df9e93202f39925721a7a2bb7b8"},
+    {file = "ty-0.0.4-py3-none-manylinux_2_17_armv7l.manylinux2014_armv7l.whl", hash = "sha256:c893b968d2f9964a4d4db9992c9ba66b01f411b1f48dffcde08622e19cd6ab97"},
+    {file = "ty-0.0.4-py3-none-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:526c925b80d68a53c165044d2370fcfc0def1f119f7b7e483ee61d24da6fb891"},
+    {file = "ty-0.0.4-py3-none-manylinux_2_17_ppc64.manylinux2014_ppc64.whl", hash = "sha256:857f605a7fa366b6c6e6f38abc311d0606be513c2bee8977b5c8fd4bde1a82d5"},
+    {file = "ty-0.0.4-py3-none-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:b4cc981aa3ebdac2c233421b1e58c80b0df6a8e6e6fa8b9e69fbdfd2f82768af"},
+    {file = "ty-0.0.4-py3-none-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:b03b2708b0bf67c76424a860f848aebaa4772c05529170c3761bfcaea93ec199"},
+    {file = "ty-0.0.4-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:469890e885544beb129c21e2f8f15321f0573d094aec13da68593c5f86389ff9"},
+    {file = "ty-0.0.4-py3-none-musllinux_1_2_aarch64.whl", hash = "sha256:abfd928d09567e12068aeca875e920def3badf1978896f474aa4b85b552703c4"},
+    {file = "ty-0.0.4-py3-none-musllinux_1_2_armv7l.whl", hash = "sha256:44b8e94f9d64df12eae4cf8031c5ca9a4c610b57092b26ad3d68d91bcc7af122"},
+    {file = "ty-0.0.4-py3-none-musllinux_1_2_i686.whl", hash = "sha256:9d6a439813e21a06769daf858105818c385d88018929d4a56970d4ddd5cd3df2"},
+    {file = "ty-0.0.4-py3-none-musllinux_1_2_x86_64.whl", hash = "sha256:c3cfcf26cfe6c828e91d7a529cc2dda37bc3b51ba06909c9be07002a6584af52"},
+    {file = "ty-0.0.4-py3-none-win32.whl", hash = "sha256:58bbf70dd27af6b00dedbdebeec92d5993aa238664f96fa5c0064930f7a0d30b"},
+    {file = "ty-0.0.4-py3-none-win_amd64.whl", hash = "sha256:7c2db0f96218f08c140bd9d3fcbb1b3c8c5c4f0c9b0a5624487f0a2bf4b76163"},
+    {file = "ty-0.0.4-py3-none-win_arm64.whl", hash = "sha256:69f14fc98e4a847afa9f8c5d5234d008820dbc09c7dcdb3ac1ba16628f5132df"},
+    {file = "ty-0.0.4.tar.gz", hash = "sha256:2ea47a0089d74730658ec4e988c8ef476a1e9bd92df3e56709c4003c2895ff3b"},
+]
+
 [[package]]
 name = "typing-extensions"
 version = "4.15.0"
@@ -1680,27 +1386,6 @@ files = [
 [package.dependencies]
 typing-extensions = ">=4.12.0"
 
-[[package]]
-name = "virtualenv"
-version = "20.35.4"
-description = "Virtual Python Environment builder"
-optional = false
-python-versions = ">=3.8"
-groups = ["dev"]
-files = [
-    {file = "virtualenv-20.35.4-py3-none-any.whl", hash = "sha256:c21c9cede36c9753eeade68ba7d523529f228a403463376cf821eaae2b650f1b"},
-    {file = "virtualenv-20.35.4.tar.gz", hash = "sha256:643d3914d73d3eeb0c552cbb12d7e82adf0e504dbf86a3182f8771a153a1971c"},
-]
-
-[package.dependencies]
-distlib = ">=0.3.7,<1"
-filelock = ">=3.12.2,<4"
-platformdirs = ">=3.9.1,<5"
-
-[package.extras]
-docs = ["furo (>=2023.7.26)", "proselint (>=0.13)", "sphinx (>=7.1.2,!=7.3)", "sphinx-argparse (>=0.4)", "sphinxcontrib-towncrier (>=0.2.1a0)", "towncrier (>=23.6)"]
-test = ["covdefaults (>=2.3)", "coverage (>=7.2.7)", "coverage-enable-subprocess (>=1)", "flaky (>=3.7)", "packaging (>=23.1)", "pytest (>=7.4)", "pytest-env (>=0.8.2)", "pytest-freezer (>=0.4.8) ; platform_python_implementation == \"PyPy\" or platform_python_implementation == \"GraalVM\" or platform_python_implementation == \"CPython\" and sys_platform == \"win32\" and python_version >= \"3.13\"", "pytest-mock (>=3.11.1)", "pytest-randomly (>=3.12)", "pytest-timeout (>=2.1)", "setuptools (>=68)", "time-machine (>=2.10) ; platform_python_implementation == \"CPython\""]
-
 [[package]]
 name = "watchfiles"
 version = "1.1.1"
@@ -1843,5 +1528,5 @@ watchdog = ["watchdog (>=2.3)"]
 
 [metadata]
 lock-version = "2.1"
-python-versions = ">=3.12,<4.0"
-content-hash = "b32ba1ec8fded698aa3d69272d543bf383c844a57fc307558ebd1de6a11c7120"
+python-versions = ">=3.13,<4.0"
+content-hash = "e52cf97faaeae41aca54d2d84d933056c726c3401ef7247fb176bf772bc28a19"
diff --git a/pyproject.toml b/pyproject.toml
index 0656932..fd34f8e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,35 +7,28 @@ name = "toldg"
 version = "0.1.0"
 description = "Tool to generate ledger files from csv"
 readme = "README.md"
-requires-python = ">=3.12,<4.0"
+requires-python = ">=3.13,<4.0"
 license = {text = "MIT"}
 authors = [
     {name = "Felix Martin", email = "mail@felixm.de"}
 ]
 dependencies = [
-    "fava (>=1.30.1,<2.0.0)",
-    "pydantic (>=2.10.6,<3.0.0)",
-    "beancount (>=3.1.0,<4.0.0)",
-    "rich (>=13.9.4,<14.0.0)",
-    "numpy (>=2.2.3,<3.0.0)"
+    "fava",
+    "pydantic",
+    "beancount",
+    "rich",
+    "numpy",
+    "ty",
+    "ruff",
 ]
 
-[tool.poetry.group.dev.dependencies]
-pre-commit = "^4.1.0"
-black = "^25.1.0"
-isort = "^6.0.1"
-pytest = "^8.3.4"
-
 [project.scripts]
 toldg = "toldg.__main__:main"
 
 [tool.setuptools]
 package-dir = {"" = "src"}
 
-[tool.black]
-line-length = 88
-target-version = ["py312"]
+[tool.ruff]
+target-version = "py313" 
+line-length = 100
 
-[tool.isort]
-profile = "black"
-line_length = 88
diff --git a/src/toldg/__main__.py b/src/toldg/__main__.py
index a8bc231..9891611 100644
--- a/src/toldg/__main__.py
+++ b/src/toldg/__main__.py
@@ -7,7 +7,8 @@ from rich.logging import RichHandler
 
 from toldg.process import process_csv_files, process_ldg_files
 from toldg.train import train
-from toldg.utils import load_config, remove_if_exists, write_meta
+from toldg.utils import load_config, remove_if_exists
+from toldg.models import Config
 
 
 def init_logging():
@@ -19,10 +20,28 @@ def init_logging():
     )
 
 
+def get_new_entries(entries: list, csv_entries: list) -> list:
+    key_to_entry = {
+        (entry.meta["source_file"], entry.meta["source_index"]): entry for entry in entries
+    }
+    assert len(entries) == len(key_to_entry), "Transaction keys must be unique"
 
-def load_and_write_back(filename):
-    entries, errors, options_map = beancount.loader.load_file(filename)
+    new_entries = []
+    for csv_entry in csv_entries:
+        key = (csv_entry.csv_file, csv_entry.index)
+        if key in key_to_entry:
+            existing_entry = key_to_entry[key]
+            if existing_entry.meta["source_row"] != csv_entry.row:
+                msg = f"Consistency error: CSV entry {csv_entry} is different to {existing_entry}"
+                logging.error(msg)
+                raise SystemExit(1)
+        else:
+            new_entries.append(csv_entry)
+    logging.info(f"Got {len(new_entries)} new and {len(entries)} existing transactions.")
+    return new_entries
 
+
+def update_ledger(config: Config):
     def beancount_entry_to_string(entry) -> str:
         buf = io.StringIO()
         beancount.parser.printer.print_entry(entry, file=buf)
@@ -31,23 +50,44 @@ def load_and_write_back(filename):
     def is_transaction(entry) -> bool:
         return isinstance(entry, beancount.core.data.Transaction)
 
-    prev_entry_was_transaction = False
+    filename = config.output_file
+    entries, errors, options_map = beancount.loader.load_file(filename)
+
     if errors:
-        print(f"errors in generated '{filename}'")
+        logging.error(f"errors in '{filename}'")
         for err in errors:
-            print(err)
-    else:
-        entries.sort(key=lambda e: e.date)
-        with open(filename, "w") as f:
-            f.write('option "operating_currency" "USD"\n')
-            for entry in entries:
-                if prev_entry_was_transaction:
-                    f.write("\n")
-                elif not prev_entry_was_transaction and is_transaction(entry):
-                    f.write("\n")
-                f.write(beancount_entry_to_string(entry))
+            logging.error(err)
+        raise SystemExit(1)
+
+    entries.sort(key=lambda e: e.date)
+
+    # Note(felixm): Only write back transactions from the main beancount file.
+    # The issue is that `beancount.loader.load_file` does not allow for a full
+    # round trip; some of the entries get swallowed. Therefore, treat all files
+    # that are not the main beancount file as input only files. This means
+    # these input only files can only be edited by hand, but the user can use
+    # them to set options for beancount and fava, and add other types of
+    # entries that would otherwise disappear after the round trip. I have seen
+    # tickets on GitHub about changing this API so that everything can be
+    # written back as is, but until then, this works well for my use-case.
+    entries = [e for e in entries if e.meta["filename"] == str(filename.absolute())]
+
+    csv_entries = process_csv_files(config, False)
+    entries += get_new_entries(entries, csv_entries)
+    remove_if_exists(config.output_file)
+    process_ldg_files(config)
+
+    with open(filename, "a") as f:
+        prev_entry_was_transaction = False
+        for entry in entries:
+            if prev_entry_was_transaction:
                 f.write("\n")
-                prev_entry_was_transaction = is_transaction(entry)
+            elif not prev_entry_was_transaction and is_transaction(entry):
+                f.write("\n")
+            f.write(beancount_entry_to_string(entry))
+            f.write("\n")
+            prev_entry_was_transaction = is_transaction(entry)
+    logging.info(f"Ledger file '{filename}' was written successfully.")
 
 
 def main():
@@ -56,11 +96,7 @@ def main():
     if len(sys.argv) > 2 and sys.argv[2] == "train":
         train(config)
     else:
-        remove_if_exists(config.output_file)
-        write_meta(config)
-        process_csv_files(config)
-        load_and_write_back(config.output_file)
-        process_ldg_files(config)
+        update_ledger(config)
 
 
 if __name__ == "__main__":
diff --git a/src/toldg/fzf.py b/src/toldg/fzf.py
index 6f36f50..554cfec 100644
--- a/src/toldg/fzf.py
+++ b/src/toldg/fzf.py
@@ -8,9 +8,7 @@ EXECUTABLE_NAME = "fzf.exe" if sys.platform == "win32" else "fzf"
 def iterfzf(iterable, prompt="> "):
     cmd = [EXECUTABLE_NAME, "--prompt=" + prompt]
     encoding = sys.getdefaultencoding()
-    proc = subprocess.Popen(
-        cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=None
-    )
+    proc = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=None)
     if proc.stdin is None:
         return None
     try:
@@ -24,7 +22,10 @@ def iterfzf(iterable, prompt="> "):
         return None
     if proc.stdout is None:
         return None
-    decode = lambda t: t.decode(encoding)
+
+    def decode(t):
+        return t.decode(encoding)
+
     output = [decode(ln.strip(b"\r\n\0")) for ln in iter(proc.stdout.readline, b"")]
     try:
         return output[0]
diff --git a/src/toldg/models.py b/src/toldg/models.py
index 377a712..c0646b1 100644
--- a/src/toldg/models.py
+++ b/src/toldg/models.py
@@ -86,4 +86,3 @@ class Transaction(BaseModel):
 
     def key(self):
         return self.csv_file + ", " + self.row
-
diff --git a/src/toldg/predict.py b/src/toldg/predict.py
index a82f1ca..e1bbe34 100644
--- a/src/toldg/predict.py
+++ b/src/toldg/predict.py
@@ -1,11 +1,10 @@
-import json
 import logging
 import os
 import pickle
 import re
-from collections import Counter, defaultdict
+from collections import Counter
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Set, Tuple
+from typing import Dict, List, Optional, Tuple
 
 import numpy as np
 
@@ -31,9 +30,7 @@ class Tokenizer:
             word_counts.update(tokens)
 
         # Filter words by minimum count
-        filtered_words = [
-            word for word, count in word_counts.items() if count >= self.min_count
-        ]
+        filtered_words = [word for word, count in word_counts.items() if count >= self.min_count]
 
         # Build vocabulary
         self.vocab = {word: idx for idx, word in enumerate(filtered_words)}
@@ -373,7 +370,6 @@ def get_sort_categories(model_path: Path):
         _classifier.sort_categories(row, categories)
 
     try:
-
         model_path = Path("transaction_classifier.pkl")
         _classifier = TransactionClassifier(model_path)
         if _classifier.model is None:
@@ -385,9 +381,7 @@ def get_sort_categories(model_path: Path):
     return sort_categories
 
 
-def add_account2(
-    model_path: Path, transactions: List[Transaction], categories: List[str]
-):
+def add_account2(model_path: Path, transactions: List[Transaction], categories: List[str]):
     """Add account2 to unmapped transactions."""
     unmapped_transactions = list(filter(lambda t: t.mapping is None, transactions))
     if len(unmapped_transactions) == 0:
diff --git a/src/toldg/process.py b/src/toldg/process.py
index ea17bdf..0f39397 100644
--- a/src/toldg/process.py
+++ b/src/toldg/process.py
@@ -14,10 +14,9 @@ from toldg.models import Config, CsvConfig, Mapping, Transaction
 
 def process_ldg_files(config: Config):
     with open(config.output_file, "a") as f_out:
-        f_out.write("\n")
         for ldg_file in toldg.utils.get_ldg_files(config.input_directory):
             ldg_rel = os.path.relpath(ldg_file, os.path.dirname(config.output_file))
-            f_out.write(f"include \"{ldg_rel}\"\n")
+            f_out.write(f'include "{ldg_rel}"\n')
 
 
 def get_csv_config(csv_file: str, csv_configs: list[CsvConfig]) -> CsvConfig:
@@ -63,8 +62,7 @@ def get_transactions(csv_file: str, config: CsvConfig) -> list[Transaction]:
         for _ in range(config.skip):
             next(reader)
         rows = [row for row in reader if row]
-    transactions = [row_to_transaction(i, row, fields)
-                    for i, row in enumerate(reversed(rows))]
+    transactions = [row_to_transaction(i, row, fields) for i, row in enumerate(reversed(rows))]
     return transactions
 
 
@@ -74,9 +72,7 @@ def apply_mappings(transactions: list[Transaction], mappings: dict[str, Mapping]
         if t.key() in mappings:
             mapping = mappings[t.key()]
             assert isinstance(mapping, Mapping)
-            assert (
-                mapping.count > 0
-            ), f"{mapping} used by {t} but count is not greater than '0'."
+            assert mapping.count > 0, f"{mapping} used by {t} but count is not greater than '0'."
             mapping.count -= 1
             t.mapping = mapping
         else:
@@ -86,7 +82,7 @@ def apply_mappings(transactions: list[Transaction], mappings: dict[str, Mapping]
         assert mapping.count == 0, f"{mapping} was not used as often as expected!"
 
 
-def process_csv_files(config: Config) -> list[Transaction]:
+def process_csv_files(config: Config, write_outputs: bool = True) -> list[Transaction]:
     csv_files = toldg.utils.get_csv_files(config.input_directory)
     transactions = []
     for csv_file in csv_files:
@@ -97,6 +93,7 @@ def process_csv_files(config: Config) -> list[Transaction]:
     mappings = toldg.utils.read_mappings(config.mappings_file)
     apply_mappings(transactions, mappings)
     toldg.predict.add_account2(config.model, transactions, config.categories)
-    toldg.utils.write_mappings(transactions, config.mappings_file)
-    toldg.write.render_to_file(transactions, config)
+    if write_outputs:
+        toldg.utils.write_mappings(transactions, config.mappings_file)
+        toldg.write.render_to_file(transactions, config)
     return transactions
diff --git a/src/toldg/train.py b/src/toldg/train.py
index 6f28f28..761f6e5 100644
--- a/src/toldg/train.py
+++ b/src/toldg/train.py
@@ -1,5 +1,4 @@
 import logging
-from pathlib import Path
 
 from toldg.models import Config
 from toldg.predict import train_classifier
diff --git a/src/toldg/utils.py b/src/toldg/utils.py
index 105c454..f651e9b 100644
--- a/src/toldg/utils.py
+++ b/src/toldg/utils.py
@@ -3,7 +3,7 @@ import logging
 import os
 import sys
 from pathlib import Path
-from typing import Any, Dict, List, Optional
+from typing import Dict, List
 
 from pydantic import ValidationError
 
@@ -57,14 +57,6 @@ def category_to_bean(c: str) -> str:
     return ":".join(new_sections)
 
 
-def write_meta(config: Config):
-    with open(config.output_file, "a") as f:
-        for category in config.categories:
-            f.write(f"2017-01-01 open {category_to_bean(category)}\n")
-        f.write("\n")
-        f.write('option "operating_currency" "USD"\n\n')
-
-
 def write_mappings(transactions: List[Transaction], mappings_file: Path):
     """Write transactions to the mappings file."""
 
@@ -74,10 +66,8 @@ def write_mappings(transactions: List[Transaction], mappings_file: Path):
             pass
         else:
             mapping = Mapping(
-                **{
-                    "account2": t.account2.strip(),
-                    "narration": t.description,
-                }
+                account2=t.account2.strip(),
+                narration=t.description,
             )
             mappings[t.key()] = mapping
 
diff --git a/src/toldg/write.py b/src/toldg/write.py
index eeeb293..d0518ef 100644
--- a/src/toldg/write.py
+++ b/src/toldg/write.py
@@ -1,4 +1,3 @@
-from pathlib import Path
 from typing import List
 
 from toldg.models import Config, Transaction
@@ -6,11 +5,11 @@ from toldg.utils import category_to_bean
 
 BEANCOUNT_TRANSACTION_TEMPLATE = """
 {t.date} * {description}{tags}
-    {account2:<40}  {t.debit:<6} {t.currency}
-    {account1:<40}  {t.credit:<6} {t.currency}
     source_file: "{t.csv_file}"
     source_index: {t.index}
     source_row: "{t.row}"
+    {account2:<40}  {t.debit:<6} {t.currency}
+    {account1:<40}  {t.credit:<6} {t.currency}
 """
 
 
@@ -58,4 +57,3 @@ def render_to_file(transactions: List[Transaction], config: Config):
     content = "".join(format(t) for t in transactions)
     with open(config.output_file, "a") as f:
         f.write(content)
-