Thoughts, learnings, references, and things I want to remember across engineering, marketing technology, AI, and the web.https://studio.sultankautsar.com/note/enhttps://studio.sultankautsar.com/note/lockdownhttps://studio.sultankautsar.com/note/lockdownHow I made the code of about 50 WordPress sites immutable with chattr, what that broke, two protections that had silently never run, and a quiet daily report.Tue, 13 Oct 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/spamhttps://studio.sultankautsar.com/note/spamWhy Google kept almost a million gambling spam URLs after the WordPress sites were clean, and how I found them in access logs and answered them with a 410 rule.Tue, 13 Oct 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/overloadhttps://studio.sultankautsar.com/note/overloadHow a Facebook crawler flood took down every WordPress site on a shared server, why a full opcache looked like an attack, and the caps that keep sites apart.Tue, 13 Oct 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/breachhttps://studio.sultankautsar.com/note/breachHow a WordPress Core exploit reached about 30 old WordPress sites on two RunCloud servers, what the attacker left, the cleanup, and the hardening I recommend.Fri, 09 Oct 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/wp2shellhttps://studio.sultankautsar.com/note/wp2shellHow an unauthenticated WordPress Core exploit spread across seven sites on one RunCloud server, the signs it leaves, the cleanup I repeated, and how to stop it.Wed, 07 Oct 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/trackinghttps://studio.sultankautsar.com/note/trackingHow sultankautsar.com is tracked: a hand-built consent banner, Consent Mode V2 in advanced mode, Google Tag Manager, six GA4 events, and a strict CSP.Sat, 03 Oct 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/opushttps://studio.sultankautsar.com/note/opusHow I use Claude Opus 5.5 in Claude Code for client work, company projects, and personal tools: the habits, the review loop, and nine days of real sessions.Sat, 03 Oct 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/sesguardhttps://studio.sultankautsar.com/note/sesguardSES Guard, a CloudFormation stack that watches Amazon SES for sending spikes and high bounce or complaint rates, stops sending, and says who was sending.Thu, 01 Oct 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/headlesshttps://studio.sultankautsar.com/note/headlessA headless CMS for a company brand site with WordPress and Next.js on RunCloud: Docker, Supervisor, on-demand revalidation, and scripted deploys with rollback.Mon, 28 Sep 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/pipelinehttps://studio.sultankautsar.com/note/pipelineHow development, preview, and production environments work together, with build-once promotion, feature flags, and a rollback plan decided before you need it.Wed, 16 Sep 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/astrahttps://studio.sultankautsar.com/note/astraMy GPT-6 Astra workflow: high reasoning to plan, low reasoning to build, and a practical process for better specifications, code review, testing, and delivery.Mon, 07 Sep 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/gpthttps://studio.sultankautsar.com/note/gptA personal reflection on using Codex and the GPT-5.6 family to plan, review, and implement software faster while handling demanding client and internal work.Sun, 23 Aug 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/tagmanagerhttps://studio.sultankautsar.com/note/tagmanagerClean up, speed up, and secure your Google Tag Manager container: GTM audits, server-side tagging, and a data layer the site and the container can both rely on.Tue, 28 Jul 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/conversionhttps://studio.sultankautsar.com/note/conversionGoogle Ads conversion tracking, including server-side setups, by a Google Tag Manager expert, so automated bidding learns from conversions that really happened.Mon, 27 Jul 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/consenthttps://studio.sultankautsar.com/note/consentConsent Mode V2 set up by a Google Tag Manager expert, so the site follows GDPR and other privacy rules and the data your decisions depend on still holds up.Sun, 26 Jul 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/analyticshttps://studio.sultankautsar.com/note/analyticsGoogle Analytics 4 setup and full customer-journey tracking by a Google Tag Manager expert, built so the reports hold up when someone asks them a hard question.Sat, 25 Jul 2026 00:00:00 GMThttps://studio.sultankautsar.com/note/copilothttps://studio.sultankautsar.com/note/copilotA personal reflection on learning React Native with GitHub Copilot, shipping a mobile app for a sales team, and the switch from premium requests to AI credits.Tue, 30 Dec 2025 00:00:00 GMT