8 October 2026
7 min read
AI-native or vibe coded? How to tell before you sign
Ask for evidence, not the label. Six questions that tell a careful supplier from a vibe-coding shop before you sign, and what a real answer sounds like.
business
The Quantum Craft blog
Notes on software and AI
We write up what we learn building software and advising UK companies on adopting AI safely.
6 October 2026
10 min read
Agent, chatbot, or workflow? A 90-second decision
Three questions settle it: is the path fixed, is the conversation bounded, does it need tools and judgement. With what each shape costs to run and to keep.
ai
29 September 2026
21 min read
The technical due diligence checklist investors work from
Seven areas, the checks under each, and what the assessor tests. Twelve investor questions with model answers, UK review prices from £3,500 and a free CSV.
industry
22 September 2026
12 min read
Stripe Connect marketplace billing: four hard-to-reverse decisions
Charge type, fee ownership, payout policy and ledger strategy are cheap to choose and expensive to undo. What we picked on a coaching platform, and why.
engineering · product
15 September 2026
10 min read
Preparing for technical due diligence: a 90-day plan
Ninety days before a raise, in the order diligence weighs it: paperwork and sweeps first, documentation and honest tests next, security and a dry run last.
industry
8 September 2026
10 min read
How to reconcile Stripe payouts with your own ledger
Match a Stripe payout to your ledger by balance transaction, one row per money movement. Itemise fees, refunds and FX before NetSuite or Sage Intacct.
engineering
1 September 2026
10 min read
Open-source licences, AI-written code, and your IP story
Diligence asks three IP questions: what your dependencies oblige you to do, where the code came from, and who owns it. What a good answer looks like.
industry · engineering
25 August 2026
11 min read
Refunds, chargebacks and negative balances in a marketplace
Stripe debits refunds and chargebacks from the platform balance first. How to get that money back from a seller, and what to build before you need to.
engineering · product
18 August 2026
10 min read
Factur-X in production: the PDF was the easy half
Factur-X wraps an invoice's data in its PDF. Embedding the file is one API call; surviving EN 16931's 200 business rules is the job, validators and all.
engineering · regulation
18 August 2026
8 min read
Key-person risk: the question that ends diligence calls
What happens if your CTO leaves is a question about where knowledge lives. What an investor is probing, and the practice that changed our answer to it.
industry
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