Journal Engine

The loop that keeps the journal alive.

# recover, then one pass per minute
written = load_this_month()

while True:
    closed = read_closed_trades()
    for t in closed:
        if t.id not in written:
            journal(t)          # write row
            written.add(t.id)

    sleep_to_next_minute()      # stay quiet

One minute, one pass, forever

It boots once by recovering the tickets already written this month, then turns the same short circle every closed minute.

A restart never duplicates a row

On boot the engine reads back the tickets already on disk for this month. Everything past is remembered, so no closed trade is ever journaled twice.

Loud only when it matters

When nothing closed, the pass does nothing. Work happens only when a trade is real.