WooCommerce extension upgrade audit

Use this skill to produce evidence for compatibility, not merely to change a version header. Changelogs identify likely areas; installed release source and runtime behavior establish the contract actually shipped.

When the audit crosses from WooCommerce 10.9 or older to 11.0 or newer, read references/woocommerce-11.md before changing code.

Workflow

1. Establish exact baselines

Record:

• source and target WooCommerce versions;
• WordPress and PHP versions;
• active HPOS, block checkout, email, fulfillment, and experimental feature states;
• bundled/active Action Scheduler version;
• companion extensions in scope, such as Stripe or Subscriptions.

Do not infer the runtime Action Scheduler version from WooCommerce's bundled directory alone. WordPress loads the newest registered copy.