Requirements

• WordPress 6.5 or later (tested up to 7.1)
• WooCommerce 8.8 or later (tested up to 11.1), active; WordPress won't activate Stockpool without it
• PHP 7.4 or later
• WooCommerce stock management turned on (WooCommerce → Settings → Products → Inventory → Enable stock management). Without it WooCommerce never reduces stock, and Stockpool doesn't either.

What it works with

• Simple products, variable products and their variations. Grouped products work too: each product in the group sells from its own pools.
• Classic themes and block themes, the classic cart and checkout and the cart and checkout blocks. The cart limits and checkout reservations run in both.
• High-Performance Order Storage (HPOS). Stockpool declares itself compatible.
• Products that track their own stock. Both limits then apply: the product sells until either its own stock or a pool runs out.
• Gridline, Extendiment's bulk product editor, which gets a column for pool links (see Bulk linking with Gridline).

What it adds to your site

• Three database tables: the pools, their stock history, and the stock held for orders in checkout.
• A little product meta on linked products (their pool links) and on order items (which pools they took stock from).
• No scheduled tasks of its own: expired checkout holds are cleared with WooCommerce's daily cleanup.
• No external requests.