https://martinfric.dev/blog/ Technical essays on backend architecture, workflow engines, multi-tenancy, AI-augmented development, and the practical realities of running a small system in a regulated market. en-us Fri, 15 May 2026 00:00:00 GMT hand-rolled https://martinfric.dev/blog/posts/workflow-engine-why-not-temporal https://martinfric.dev/blog/posts/workflow-engine-why-not-temporal Fri, 15 May 2026 00:00:00 GMT The case for entity-is-state workflow engines in modular monoliths, and why a JSON-config-driven state machine beat external orchestration for our regulated-market use case. https://martinfric.dev/blog/posts/multi-tenant-rls-als-nestjs https://martinfric.dev/blog/posts/multi-tenant-rls-als-nestjs Fri, 15 May 2026 00:00:00 GMT How to wire Postgres Row-Level Security through every authenticated request using AsyncLocalStorage, transaction-bound sessions, and a single guard — without leaking tenant filters into business logic. https://martinfric.dev/blog/posts/result-pattern-transaction-rollback https://martinfric.dev/blog/posts/result-pattern-transaction-rollback Fri, 15 May 2026 00:00:00 GMT The no-throw rule in domain/application layers conflicts with TypeORM's throw-to-rollback contract. Here's the sentinel pattern we use to bridge them without leaking exceptions into use cases. https://martinfric.dev/blog/posts/modular-monolith-extraction-saga https://martinfric.dev/blog/posts/modular-monolith-extraction-saga Fri, 15 May 2026 00:00:00 GMT Cross-module atomic writes via NestJS forwardRef work in-process and break across processes. Saga, outbox, inbox — and why 2PC is usually wrong. The honest cost of extraction and how to plan for it from day one. https://martinfric.dev/blog/posts/claim-state-cas-primitive https://martinfric.dev/blog/posts/claim-state-cas-primitive Fri, 15 May 2026 00:00:00 GMT Optimistic locking catches double-write, not double-action. A config-driven CAS primitive plus a per-module janitor closes the gap for steps with non-idempotent side effects. https://martinfric.dev/blog/posts/pilot-case-study https://martinfric.dev/blog/posts/pilot-case-study Fri, 15 May 2026 00:00:00 GMT A retrospective on running a modular-monolith energy-community platform through its first six months in production — what survived contact with real users, what didn't, and what 150+ metering points told me that no design review could have. https://martinfric.dev/blog/posts/adr-driven-solo-dev https://martinfric.dev/blog/posts/adr-driven-solo-dev Fri, 15 May 2026 00:00:00 GMT Architecture Decision Records are usually a team artifact. They're arguably more valuable solo — they're how you negotiate with your future self about choices your present self can't remember making. https://martinfric.dev/blog/posts/ai-multiplier-discipline-durability https://martinfric.dev/blog/posts/ai-multiplier-discipline-durability Fri, 15 May 2026 00:00:00 GMT The rules I wrote for myself to make AI a 20x multiplier instead of a lottery: CLAUDE.md as constitution, ADRs as decision graph, memory as persistent context, automation as workflow encoding. Plus why this discipline raises the bus factor instead of lowering it. https://martinfric.dev/blog/posts/three-nights-of-ai-anatomy https://martinfric.dev/blog/posts/three-nights-of-ai-anatomy Fri, 15 May 2026 00:00:00 GMT Anatomy of an AI-augmented sprint-orchestration and code-review dashboard built in three evenings. DDD-lite, branded value objects, a self-learning triage loop, a JSON repair pipeline worth lifting, and a dual-backend AI abstraction — with the rough edges named honestly. Companion piece to the AI-multiplier essay.