A developer's project log for Private Invoice, a self-hosted invoice management system where instances exchange invoices using decentralized identifiers, verifiable credentials and Ethereum payments. It covers the concept, open design questions, and API refactoring decisions as the project is built.

Product update newsletter from Prilet, a platform for consulting engagements, covering new features such as early ACH auto-pay debits, mid-week hours review, and app-wide search. It explains what each change does and how to use it, aimed at people who run or pay for consulting work.

Product update blog from Flow Platform, a scheduling and finance tool for interpreters and agencies, covering an incident report on an expired security certificate and feature releases such as event timelines, auto-bundling rules, a QuickBooks dashboard and a rebuilt Returned to Vendor screen. Readers learn what changed in each release and why, mostly from the vendor's own perspective.

Christian Häfner writes about testing tools and methods for online businesses, sharing experiences and practical uses, and discussing them in his LSWW community. Recent issues cover compliant invoicing for Shopify merchants under German tax rules, and announce and recap meetups on RAG, vector databases and knowledge graphs.