Installation

Requirements

Craft CMS 5.3 or later
Craft Commerce 5.0 or later
PHP 8.2 or later

Install

composer require justinholtweb/craft-abacus
php craft plugin/install abacus

Or find Abacus in the Craft Plugin Store and install it from there.

Nothing changes until you say so

Abacus installs with one disabled scheme per store. Installing a plugin should never silently renumber a live store, so until you open Abacus → Schemes, set a format and switch the scheme on, every order keeps the reference Commerce gives it.

Your first scheme

Go to Abacus → Schemes and open the scheme that was created for your store.
Set a Reference format. It must contain {number} — see Configuration.
Set the Starting number, Increment and Zero padding.
Choose a Reset policy. If you pick anything other than Never, put a date token in the format too.
Watch the live preview of the next three numbers. It reflects everything above, and it never spends a number.
Switch the scheme on.

The next order to complete gets the first number.

Editions

Lite is free. Pro is a one-off $39 with a $19/year renewal, and adds everything that gets interesting once you have more than one kind of order.

	Lite	Pro
Price	Free	$39, $19/year renewal
One sequence per store	✅	✅
Format tokens — prefix, suffix, date, store, site	✅	✅
Zero-padding, custom start, custom increment	✅	✅
Counter resets — daily, monthly, yearly	✅	✅
Live preview of the next three numbers	✅	✅
Panel on Commerce's order screen	✅	✅
`craft.abacus.*` Twig API	✅	✅
Console: status, preview, set	✅	✅
Several schemes per store, matched by order condition	—	✅
Skip lists — reserve numbers and ranges	—	✅
Reclaim numbers from orders that never completed	—	✅
Backfill existing orders, with dry run and undo	—	✅
Allocation ledger in the CP, with CSV export	—	✅

Existing orders

Installing Abacus does not touch orders that have already completed. To bring them into the sequence, use Backfill — which rehearses before it writes.