SHSohag Hasaninnotes.sohag.pro·Jun 15 · 9 min readModeling Double-Entry Accounting in Go: Types That Make Invariants Impossible to ViolateA few years ago I shipped a bug that moved money and forgot to take it from anywhere. The code added a credit to one account and, because of a botched early return, never wrote the matching debit. Not00
KEkingsley ebube onohinkingsleyonoh.hashnode.dev·May 5 · 7 min readWhy I Made the Ledger Refuse Single RowsThe bug I kept designing around was not "wrong penalty amount." Wrong amounts are visible. A supplier sees a credit note for EUR 8400, checks the contract, and pushes back. The operator can investigate. The trail exists. The quieter failure is a pena...00
KEkingsley ebube onohinkingsleyonoh.hashnode.dev·Apr 18 · 7 min readWhy Extracted Obligations Never Activate ThemselvesThe RAG Platform returns 12 obligations from a signed MSA. Nine of them are real payment schedules with deadline clauses and clause references. Two are duplicates of the same renewal window, worded differently in different sections. One is a hallucin...00
MDMike Dyerinlistenrightmeow.hashnode.dev·Mar 29 · 9 min readAI Made My Architecture Deeper, Not SimplerThe pitch is always simplification. AI will make development faster, architectures leaner, systems easier. Fewer decisions, fewer layers, fewer meetings. Point the model at your domain, let it generat00
MDMike Dyerinlistenrightmeow.hashnode.dev·Mar 29 · 7 min readThe Classification Gap: The Bug That Passes Every TestThere's a class of domain modeling error that no test catches. No structural analysis flags it. No linter complains. Your gap report comes back clean. Your aggregate has the right number of invariants00
NBNadir Badnjevicinnadirbad.dev·Mar 7 · 11 min readEventStorming: How to Stop Building the Wrong SystemMost teams make their most critical architectural decisions during the first few weeks of a project. That's also when collective knowledge about the domain is at its absolute lowest. It's the Project 00
APAbhilash PSinabhilashps.me·Jan 19 · 21 min readUnderstanding Django Proxy Models: Usage, Benefits, and LimitationsWhen we first learn Django, models are usually explained in a very concrete way. One model maps to one database table, the relationship is one-to-one, and each row represents an instance of that model. This mental model works well for most use cases ...00
APAbhilash PSinabhilashps.me·Jan 13 · 5 min readConceptual Abstraction: A Design Idea That Predates RESTDefinition Conceptual abstraction is a long-standing principle in software design—one that appears wherever systems are expected to survive change. When conceptual abstraction is discussed in the context of REST, it can sometimes feel like a REST-spe...00
APAbhilash PSinabhilashps.me·Jan 2 · 7 min readAuthorization in Django: From Permissions to Policies : Part 3 — ContentTypes and the Model RegistryOnce we stop treating permissions as rules and start treating them as data, a natural question follows: Data about what? A permission is a label that says, *“*this action applies to that thing.” But how does Django identify that thing—especially in a...00
