Start with the business workflow
A custom module may support reference-based ordering, delivery rules or an ERP connector. First identify who acts, which data is involved and what outcome is expected. Focused scope prevents unnecessary features and reduces maintenance costs.
Specify edge cases
For a quick-order screen, define behaviour for unknown SKUs, inactive products, combinations, limited stock, customer-specific prices and incomplete input. Describe visible error states, permissions and how the cart is updated. Test cases make requirements objectively verifiable.
Respect extension mechanisms
PrestaShop display and action hooks support rendering and business events. Choose suitable module controllers and services instead of modifying core files when possible. Overrides can create conflicts with upgrades and other plugins, so justify and test them carefully.
Design useful administration
Back-office controls need validation, defaults, meaningful errors and appropriate permissions. Connectors benefit from a synchronisation status and filtered logs. Consider multistore settings, translations and the real tasks the merchant needs to perform without developer intervention.
Build security into the feature
Validate user input, authorise sensitive operations, parameterise database queries and escape output. Restrict secrets and downloads appropriately. Limit personal data in logs and store only information required for the service.
Ship with reproducible tests
Check real PrestaShop, PHP, theme and module combinations rather than a broad compatibility label. Exercise installation, settings, unusual inputs, mobile use and rollback. Provide documentation, versions and a defined maintenance path.
Review checklist
- Specify business scenarios
- Document errors and permissions
- Choose hooks and services
- Test administrative screens
- Plan maintenance
Related guides on Concepty
- PrestaShop 8 to 9 migration: a reliable step-by-step checklist
- Connecting PrestaShop to an ERP: orders, stock and reliability
- PrestaShop B2B quick ordering: entering SKUs and quantities
Practical next steps
Before making changes, record your versions, business constraints and reproducible issues. I can help with PrestaShop development, or you can describe your project on the contact page. The goal is a tested, maintainable improvement rather than another unnecessary dependency.