money/README.md

# money

A personal finance tracker built around bank statements rather than manual entry.

You keep a **data directory with one folder per account**, drop statement exports
into those folders, and run `money import`. Transactions are extracted, tagged by
glob rules you write, and movements between your own accounts are marked as
transfers so they never count as spending.

## Layout

```
~/money/                     # the data root (see "Where the data root lives")
  rules.toml                 # tag + transfer rules, in order
  .money/index.db            # SQLite index (rebuildable; safe to delete*)
  checking/
    account.toml             # currency + how to parse this bank's exports
    2026-01.csv
    2026-02.csv
  savings/
    account.toml
    2026-01.csv
```

\* Deleting the index loses manual tags and manual transfer marks, which live
only there. Everything else is re-derived from the statements.

## Where the data root lives

Checked in order, first one wins:

1. `--root DIR` on the command line
2. `$MONEY_ROOT`
3. the `root` key in `$XDG_CONFIG_HOME/money/config.toml`, which is
   `~/.config/money/config.toml` unless `XDG_CONFIG_HOME` says otherwise
4. `~/money`

So the usual setup is to write the config file once and never pass a flag again:

```toml
# ~/.config/money/config.toml
root = "~/documents/finances"
```

A leading `~` is expanded and relative paths are made absolute. `money config`
prints the resolved root and which of the four rules chose it.

## Usage

```
money                        # open the TUI (default)
money import                 # extract new transactions from every statement
money import --force         # re-parse statements even if unchanged
money retag                  # re-apply rules.toml to everything already imported
money ls --untagged          # what still needs a tag
money ls --wide              # also show type, counterparty and reported balance
money ls --account checking --month 2026-01
money report --month 2026-01 # spending by tag
money accounts               # balances
money parsers                # available statement parsers
money config                 # which data root is in use, and why
```

An account folder appears in the app only once its statements have been
imported — creating an `account.toml` is not enough on its own. Run
`money import` (or press `i` in the TUI) after adding one.

### TUI keys

| Key | Action |
| --- | --- |
| `1` `2` `3` `4` / `tab` | accounts · transactions · report · rule builder |
| `enter` | open the selected account (accounts view) |
| `t` | set the tag on the selected transaction |
| `x` | toggle transfer on the selected transaction |
| `c` | clear manual overrides, falling back to the rules |
| `/` | filter by description |
| `u` | show only untagged transactions |
| `a` | clear the account filter |
| `i` | import · `r` re-apply rules · `q` quit |

### Rule builder (`4`)

Writing rules by hand means guessing what a glob will catch. This screen shows
the answer as you type: the form is on the left, and on the right is every
still-untagged description in the data, sorted alphabetically and grouped, with
a `▸` against each one the glob currently matches and a running
"*n* of *m* descriptions match" count.

```
▸ glob                            Untagged description              N
╭────────────────────────────╮      ACME PAYROLL JAN                1
│ *LIDL*                     │      BOLT RIDE                       1
╰────────────────────────────╯   ▸  LIDL SOFIA 4412                 2
  vs. the description            ▸  LIDL VARNA 9911                 1
                                    ZARA MLADOST                    1
  2 of 7 descriptions match
```

`tab` / `↑↓` move between the glob, account and tag fields, `pgup` / `pgdn`
scroll the list, and `enter` appends the rule to `rules.toml` and retags
immediately, so the rows it caught disappear from the list. `esc` goes back.

Leaving the account blank applies the rule everywhere; filling it in also
narrows the preview to that account. Rules are appended, so anything already in
`rules.toml` keeps precedence — the preview accounts for that automatically,
since it only ever lists transactions no existing rule has already tagged.

## rules.toml

Rules are evaluated in file order and the **first match wins**, so put transfer
rules above general tag rules. Patterns are globs (`*` and `?`) matched
case-insensitively, with whitespace collapsed.

A rule matches on `match` (the description), `counterparty` (the other side's
account number) and `type` (the bank's own classification). Setting several is
an "and": all must match.

```toml
[[rule]]
tag   = "groceries"
match = "*LIDL*"

[[rule]]
tag   = "salary"
match = "*ACME PAYROLL*"

# Money moved between your own accounts. Both legs need a rule.
[[rule]]
match    = "*TO SAVINGS*"
transfer = true
tag      = "transfer"

[[rule]]
match    = "*FROM CHECKING*"
transfer = true
tag      = "transfer"

# Transfers are often only identifiable by the counterparty IBAN, whatever
# the description happens to say.
[[rule]]
counterparty = "SI56*"
transfer     = true
tag          = "transfer"

# A rule can be limited to one account, and can require several patterns.
[[rule]]
account = "checking"
tag     = "rent"
match   = "*STANDING ORDER 4471*"

[[rule]]
type  = "CARD_PAYMENT"
match = "*LIDL*"
tag   = "groceries"
```

Editing rules never touches tags you set by hand: rule verdicts and manual
overrides are stored separately, and the manual one always wins. `money retag`
is therefore safe to run whenever you change the file.

## account.toml

Every account folder needs one. `currency` and `parser` are required.

```toml
name     = "Main Checking"
currency = "EUR"
parser   = "csv"
# minor_digits = 2       # decimal places for this currency
# include = ["*.csv"]    # only treat matching files as statements
```

### `parser = "csv"`

Column positions are 0-based.

```toml
[csv]
  delimiter   = ","             # default ","
  skip_rows   = 1               # header rows to drop
  date        = { col = 0, layout = "02.01.2006" }   # Go reference layout
  description = { col = 3 }
  amount      = { col = 4, decimal = ",", thousands = "." }
  # invert = true               # if outflows are written as positive
```

For statements with separate debit and credit columns, replace `amount`:

```toml
  debit  = { col = 4 }          # both written as positive numbers
  credit = { col = 5 }
```

Amount parsing is deliberately tolerant: `1.234,56`, `-45.20`, `45,20-`,
`(45.20)` and `45.20 EUR` all work.

### Bank-specific parsers

Three are built in, ported from the original Python extractors. They need no
`[csv]` block — the layout is baked in.

| `parser` | Statement | Notes |
| --- | --- | --- |
| `nlb` | NLB izpisek PDF | Wrapped descriptions and the counterparty IBAN are folded in from continuation lines. |
| `traderepublic` | Trade Republic PDF | Handles both the single-line and the stacked layout by measuring column positions. |
| `revolut` | `account-statement*.csv` | Skips non-COMPLETED rows, folds the fee into the amount. |

```toml
name     = "Trade Republic"
currency = "EUR"
parser   = "traderepublic"
```

The two PDF parsers shell out to `pdftotext -layout` (poppler-utils), exactly
as the Python versions did; its layout reconstruction is what makes the
column-based parsing work.

**Revolut and multiple currencies.** One export can hold several currencies,
but an account here has exactly one. Rows in other currencies are skipped and
reported at import. To keep them, give that currency its own account folder
with its own `currency` and `minor_digits` (JPY wants `minor_digits = 0`) and
put a copy or symlink of the export in it.

### `parser = "cmd"`

Runs an external extractor and reads normalised CSV (`date,description,amount`)
from its stdout. This is how PDF statements and any existing Python extractor
are handled without porting them first.

```toml
parser = "cmd"
[cmd]
  argv      = ["python3", "../extract_bankx.py", "{{file}}"]
  skip_rows = 1                 # if the script prints a header
  # layout  = "2006-01-02"      # date format the script emits (default)
```

`{{file}}` is replaced with the statement's path, and the command runs with the
account folder as its working directory, so relative script paths work.

## Adding a native parser

When a Python extractor is ported to Go, drop it in `internal/parser` and
register it — no other package changes:

```go
func init() {
	parser.Register("bankx", func(acc *config.Account) (parser.Parser, error) {
		return &bankXParser{digits: acc.Digits()}, nil
	})
}

func (p *bankXParser) Parse(path string, acc *config.Account) ([]parser.RawTxn, error) {
	// ... return date (YYYY-MM-DD), description, and signed minor units
}
```

It becomes usable by setting `parser = "bankx"` in an account.toml. Use
`parser.ParseAmount` for the decimal handling rather than rolling your own.

## Balance checks

Statements that report a running balance are verified on import: each balance
must equal the previous one plus the transaction amount, the same check all
three original scripts made. A break means a row was missed or misparsed, and
is reported as a warning without stopping the import.

## Deduplication

Each transaction gets a fingerprint from its date, amount, normalised
description, and its ordinal among identical lines in the same statement. So
two identical purchases on one day are both kept, while re-importing an
overlapping statement adds nothing. Unchanged files are skipped by checksum
before parsing.

## Development

```
go build ./... && go test ./...
```