Writing about software architecture, TypeScript patterns, and the small choices that make technical work feel sharper.https://sidlynx.me/enhttps://sidlynx.me/blog/provenance-accounting/https://sidlynx.me/blog/provenance-accounting/Receipts prove that a commit was validated; they do not say where it came from. Closing a pass of coding agents only when every commit on the branch has exactly one recorded origin is what keeps unexplained work out.Wed, 28 Oct 2026 00:00:00 GMTai-agentsgitcitypescriptsoftware-architecturehttps://sidlynx.me/blog/validation-receipts/https://sidlynx.me/blog/validation-receipts/An agent that says the tests passed is making a claim about work you did not watch. A receipt binds that claim to a commit, a command set and the logs, so a wrong one is refused instead of believed.Thu, 22 Oct 2026 00:00:00 GMTai-agentstestingcitypescriptsoftware-architecturehttps://sidlynx.me/blog/when-trpc-is-not-enough/https://sidlynx.me/blog/when-trpc-is-not-enough/tRPC is excellent for first-party TypeScript clients, but Java, C#, mobile, partners, and public integrations need an explicit contract. That usually means REST plus OpenAPI.Sat, 30 May 2026 00:00:00 GMTtrpcopenapiresttypescriptapi-designhttps://sidlynx.me/blog/trpc-as-driving-adapter/https://sidlynx.me/blog/trpc-as-driving-adapter/tRPC can be a clean driving adapter when the domain and use cases stay plain TypeScript. The trick is to keep procedures thin: validate at the boundary, call the use case, and translate the result.Mon, 18 May 2026 00:00:00 GMTtrpcclean-architecturehexagonal-architecturetypescriptapi-designhttps://sidlynx.me/blog/why-i-stopped-using-nestjs-for-ddd/https://sidlynx.me/blog/why-i-stopped-using-nestjs-for-ddd/NestJS is productive, but its defaults can quietly turn a DDD codebase into framework-driven application code. Here is the boundary I use now: plain TypeScript in the core, NestJS at the edges.Sat, 09 May 2026 00:00:00 GMTnestjsdddhexagonal-architecturetypescriptarchitecturehttps://sidlynx.me/blog/hello-world/https://sidlynx.me/blog/hello-world/A short note on the kind of TypeScript, architecture, and engineering writing that belongs on sidlynx.me.Fri, 08 May 2026 00:00:00 GMTmeta