https://shezz77.com/blog/ Short, practical write-ups on architecture, event-driven systems, cloud and DevOps modernization, and engineering leadership. en https://shezz77.com/blog/who-may-connect-to-your-mcp-server/ https://shezz77.com/blog/who-may-connect-to-your-mcp-server/ Sat, 01 Aug 2026 09:00:00 GMT AI Reusing your app's own role rows is the right instinct, and it still leaves the hard question unanswered: which roles? Hardcode it and the first customer who disagrees files a ticket you cannot close. https://shezz77.com/blog/llm-tests-scored-by-mutation-testing/ https://shezz77.com/blog/llm-tests-scored-by-mutation-testing/ Sat, 01 Aug 2026 09:00:00 GMT AI An LLM will happily take you from 44% coverage to 91% in an afternoon, and catch nothing. The fix is not a better prompt — it is a scoring function the model cannot argue with. https://shezz77.com/blog/set-up-an-mcp-server/ https://shezz77.com/blog/set-up-an-mcp-server/ Sat, 01 Aug 2026 09:00:00 GMT AI Write the server once and every client can use it — Claude Code, your own agent, the Messages API. Tools, resources, transports, config scopes, and the limits that bite in production. https://shezz77.com/blog/claude-agent-sdk-first-agent/ https://shezz77.com/blog/claude-agent-sdk-first-agent/ Sat, 01 Aug 2026 09:00:00 GMT AI Claude Code as a library. Installing it, the two entry points, what the message stream actually contains, and the three limits you set before you let it run. https://shezz77.com/blog/claude-agent-sdk-custom-tools/ https://shezz77.com/blog/claude-agent-sdk-custom-tools/ Sat, 01 Aug 2026 09:00:00 GMT AI The built-in tools cover files and shell. Everything specific to your business — issue trackers, deploy APIs, internal databases — you supply as an in-process MCP server. https://shezz77.com/blog/claude-agent-sdk-subagents/ https://shezz77.com/blog/claude-agent-sdk-subagents/ Sat, 01 Aug 2026 09:00:00 GMT AI Delegation buys you a clean context window, real parallelism, and per-agent tool restrictions. It costs you a full context rebuild each time — which is the whole trade. https://shezz77.com/blog/claude-agent-sdk-hooks-permissions/ https://shezz77.com/blog/claude-agent-sdk-hooks-permissions/ Sat, 01 Aug 2026 09:00:00 GMT AI A prompt asking an agent not to do something is a request. A hook that returns deny is a boundary. Blocking, rewriting, auditing, and where each one belongs. https://shezz77.com/blog/rabbitmq-retry-pipeline-laravel/ https://shezz77.com/blog/rabbitmq-retry-pipeline-laravel/ Sat, 01 Aug 2026 09:00:00 GMT Architecture A complete walkthrough: topology, publisher, consumer contract, delay-exchange backoff, a poison lane, idempotency, and the tests that prove it. https://shezz77.com/blog/laravel-on-ecs-fargate-tutorial/ https://shezz77.com/blog/laravel-on-ecs-fargate-tutorial/ Sat, 01 Aug 2026 09:00:00 GMT Cloud & DevOps Dockerfile, task definition, secrets, a migration gate, GitHub Actions, health checks that mean something, and a rollback that takes forty seconds. https://shezz77.com/blog/make-a-slow-mysql-query-fast/ https://shezz77.com/blog/make-a-slow-mysql-query-fast/ Sat, 01 Aug 2026 09:00:00 GMT Cloud & DevOps One real 4.2-second listing query, taken to 40 milliseconds. Reading EXPLAIN properly, composite index order, covering indexes, and keyset pagination. https://shezz77.com/blog/modular-monolith-boundaries-laravel/ https://shezz77.com/blog/modular-monolith-boundaries-laravel/ Sat, 01 Aug 2026 09:00:00 GMT Architecture Independent deploys and clear ownership without a distributed system. Module layout, a contracts-only rule, a failing build when it is broken, and how to extract later. https://shezz77.com/blog/laravel-ci-pipeline-that-catches-things/ https://shezz77.com/blog/laravel-ci-pipeline-that-catches-things/ Sat, 01 Aug 2026 09:00:00 GMT Cloud & DevOps Most CI runs tests and stops. Here is the full pipeline: static analysis, real service containers, migration-safety checks, boundary rules, and a nine-minute budget. https://shezz77.com/blog/ai-reviewer-in-ci-without-noise/ https://shezz77.com/blog/ai-reviewer-in-ci-without-noise/ Sat, 01 Aug 2026 09:00:00 GMT AI The naive version comments on everything and gets muted in a fortnight. Scoping to the diff, structured verdicts, a confidence gate, and measuring the signal ratio. https://shezz77.com/blog/context-is-the-job/ https://shezz77.com/blog/context-is-the-job/ Sat, 01 Aug 2026 09:00:00 GMT AI The useful work happens before the question. Three minutes of assembling context is the difference between a suggestion I merge and a suggestion I argue with. https://shezz77.com/blog/argue-back-rubber-duck/ https://shezz77.com/blog/argue-back-rubber-duck/ Sat, 01 Aug 2026 09:00:00 GMT AI I run design decisions past a model before I run them past a person. Not because it is smart — because it is available at 11pm and has no stake in the outcome. https://shezz77.com/blog/strange-codebase-in-a-day/ https://shezz77.com/blog/strange-codebase-in-a-day/ Sat, 01 Aug 2026 09:00:00 GMT AI Inheriting 200k lines used to be a week of grep and optimism. The goal was never to have the code explained — it was to get a map you can be wrong about quickly. https://shezz77.com/blog/the-review-bottleneck/ https://shezz77.com/blog/the-review-bottleneck/ Sat, 01 Aug 2026 09:00:00 GMT Leadership My team writes considerably more code than it did a year ago and ships about the same amount. The constraint moved, and our process did not move with it. https://shezz77.com/blog/event-bus-over-cron/ https://shezz77.com/blog/event-bus-over-cron/ Wed, 01 Jul 2026 09:00:00 GMT Architecture Scheduled jobs are the cheapest way to build a distributed system and the most expensive way to run one. Here is the migration that closed our nightly failure window. https://shezz77.com/blog/the-monolith-you-should-keep/ https://shezz77.com/blog/the-monolith-you-should-keep/ Mon, 01 Jun 2026 09:00:00 GMT Architecture Splitting a service is a bet on your ability to run more infrastructure. Often the right architecture decision is a well-bounded module and a boring deploy. https://shezz77.com/blog/boring-ecs-pipeline/ https://shezz77.com/blog/boring-ecs-pipeline/ Fri, 01 May 2026 09:00:00 GMT Cloud & DevOps Docker build, ECR push, rolling update, health check, done. The interesting part is everything I deliberately left out. https://shezz77.com/blog/rabbitmq-retries/ https://shezz77.com/blog/rabbitmq-retries/ Wed, 01 Apr 2026 09:00:00 GMT Architecture Naive requeue is an infinite loop with extra steps. Delay exchanges, capped backoff, and a poison lane cover nearly everything you will hit in production. https://shezz77.com/blog/reading-code-as-a-manager/ https://shezz77.com/blog/reading-code-as-a-manager/ Sun, 01 Mar 2026 09:00:00 GMT Leadership Staying technical as an engineering manager is not about writing the tricky patch. It is about reading enough to ask the question that saves a sprint. https://shezz77.com/blog/android-with-an-llm/ https://shezz77.com/blog/android-with-an-llm/ Sun, 01 Feb 2026 09:00:00 GMT AI Concept to Play Store with AI doing the scaffolding. What it genuinely accelerated, and the two places it quietly cost me a day. https://shezz77.com/blog/high-volume-hiring-data/ https://shezz77.com/blog/high-volume-hiring-data/ Thu, 01 Jan 2026 09:00:00 GMT Cloud & DevOps Recruitment traffic is spiky, write-heavy, and read through dashboards. Three modeling choices kept assessment platforms responsive on campaign day.