https://appthentic.in/blogs AppThentic reads your systems (code, docs, Slack and Jira), asks the person who owns each business rule why it exists, and keeps the answer with its source, owner and approval. Runs inside your infrastructure. en https://appthentic.in/blogs/you-changed-your-terms-what-is-your-system-still-charging https://appthentic.in/blogs/you-changed-your-terms-what-is-your-system-still-charging A New Zealand bank charged a fee for six years that its own terms said did not exist. Five questions to run this week on any rule whose reason has ended. Stories Tue, 20 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/payroll-went-live-and-people-are-underpaid-where-do-you-look https://appthentic.in/blogs/payroll-went-live-and-people-are-underpaid-where-do-you-look Sydney Water replaced its payroll system in July 2026. By late September three unions were taking industrial action over pay that arrived late, short or not at all. The question every migration team should ask before go-live is which rules the old system was applying. Research Sun, 18 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/which-contract-term-does-this-rule-enforce https://appthentic.in/blogs/which-contract-term-does-this-rule-enforce A UK regulator fined Deloitte £6.05 million for missing the contract terms behind overpayments Go-Ahead's rail subsidiaries booked as profit. The same link, from contract to rule, is the one your own audit will ask for. Leadership Thu, 15 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/a-billing-error-ran-for-decades-how-would-you-find-yours https://appthentic.in/blogs/a-billing-error-ran-for-decades-how-would-you-find-yours A Texas city overcharged electricity customers for roughly 30 years because a rule did something different from what its ordinance said. A customer noticed first. Stories Tue, 13 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/the-auditor-asks-who-approved-this-rule https://appthentic.in/blogs/the-auditor-asks-who-approved-this-rule An Abu Dhabi regulator fined an audit firm for thin evidence and no record of who supervised. The same question lands on every company's own controls. Leadership Sun, 11 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/your-acquisition-closed-who-can-explain-the-systems https://appthentic.in/blogs/your-acquisition-closed-who-can-explain-the-systems A 600,000-account bank conversion left customers locked out on day one. What a cutover asks of the people who know how the acquired systems work. Stories Sun, 11 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/ai-tools-get-business-rules-wrong https://appthentic.in/blogs/ai-tools-get-business-rules-wrong AI tools now delete business rules, explain them, and write new ones. All three go wrong the same way, because the reason behind a rule is rarely anywhere the tool can read. Engineering Sat, 10 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/architecture-decision-records-miss-business-rules https://appthentic.in/blogs/architecture-decision-records-miss-business-rules ADRs are the standard answer to "why did we build it this way?" They capture technology choices well and miss the business rules that nobody thought of as architecture. Engineering Fri, 09 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/new-engineers-need-the-why-not-another-wiki https://appthentic.in/blogs/new-engineers-need-the-why-not-another-wiki A new hire can read the code on day one. What takes months is learning which odd-looking rules are deliberate, and the people who know are the ones answering the same questions again. Engineering Fri, 09 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/when-the-only-engineer-who-understands-it-leaves https://appthentic.in/blogs/when-the-only-engineer-who-understands-it-leaves The code stays and the service keeps running. What leaves is the reasoning behind it, and a two-week notice period is the wrong tool for getting it back. Leadership Thu, 08 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/when-the-system-quietly-breaks-what-you-promised https://appthentic.in/blogs/when-the-system-quietly-breaks-what-you-promised Banks have refunded millions for rules that disagreed with their own terms for years. Why compliance testing misses these gaps, and what catches them. Leadership Thu, 08 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/will-ai-modernize-your-legacy-system-or-just-rewrite-it https://appthentic.in/blogs/will-ai-modernize-your-legacy-system-or-just-rewrite-it AI can translate a legacy application into a modern language in days. Whether the new system still does what the business needs depends on reasons that were never written into the code. Research Thu, 08 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/forty-two-percent-of-what-you-know https://appthentic.in/blogs/forty-two-percent-of-what-you-know What the research says about knowledge that never gets written down, and why it hits business rules hardest. Research Mon, 05 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/engineers-spend-most-of-their-time-understanding https://appthentic.in/blogs/engineers-spend-most-of-their-time-understanding Field studies and developer surveys agree. The bottleneck is not writing code, it is finding out why the code is the way it is. Engineering Thu, 01 Oct 2026 00:00:00 GMT https://appthentic.in/blogs/knight-capital-and-the-flag-nobody-remembered https://appthentic.in/blogs/knight-capital-and-the-flag-nobody-remembered What the Knight Capital failure teaches about old code, reused switches, and decisions nobody can explain. Engineering Sat, 26 Sep 2026 00:00:00 GMT https://appthentic.in/blogs/chestertons-fence-for-business-rules https://appthentic.in/blogs/chestertons-fence-for-business-rules Don't remove a rule until you know why it was put there. A century-old principle, and why it is so hard to follow in software. Leadership Tue, 22 Sep 2026 00:00:00 GMT https://appthentic.in/blogs/why-documentation-goes-stale https://appthentic.in/blogs/why-documentation-goes-stale Documentation is written once and silently drifts. Records that know when they are out of date work differently. Research Fri, 18 Sep 2026 00:00:00 GMT https://appthentic.in/blogs/why-om-asks-instead-of-guessing https://appthentic.in/blogs/why-om-asks-instead-of-guessing A model can read what a system does. Only the person who decided knows why, and a confident guess is worse than an honest "unknown". om Sat, 12 Sep 2026 00:00:00 GMT