https://yogeshsahu.xyz/log Architecture notes, cost lessons, decision logs, and weekly reflections from Yogesh Sahu. en https://yogeshsahu.xyz/log/week-32-review https://yogeshsahu.xyz/log/week-32-review Mon, 17 Aug 2026 00:00:00 GMT Automated banners, PR merges for CP-020 and CP-018, and a website fix Review https://yogeshsahu.xyz/log/week-32-review https://yogeshsahu.xyz/log/week-32-review Fri, 14 Aug 2026 00:00:00 GMT This week's review covers data validation, infrastructure, and website updates for CryptoPrism and personal projects. Review https://yogeshsahu.xyz/log/week-01-auto-pilot https://yogeshsahu.xyz/log/week-01-auto-pilot Fri, 07 Aug 2026 00:00:00 GMT The first auto-generated weekly review — what shipped across the fleet, what broke, and what's next. Review, Build https://yogeshsahu.xyz/log/week-31-review https://yogeshsahu.xyz/log/week-31-review Fri, 07 Aug 2026 00:00:00 GMT Integrated Plausible self‑hosted analytics across multiple sites and shipped UI tweaks and bug fixes. Review https://yogeshsahu.xyz/log/why-im-writing-this-weekly https://yogeshsahu.xyz/log/why-im-writing-this-weekly Fri, 31 Jul 2026 00:00:00 GMT A new Friday ritual. Three reasons I'm starting a personal journal alongside the technical notes and the founder hub — and what to expect. Life, Build https://yogeshsahu.xyz/log/what-i-got-wrong-about-my-second-startup https://yogeshsahu.xyz/log/what-i-got-wrong-about-my-second-startup Sat, 25 Jul 2026 00:00:00 GMT Gamerz Nation was my first company at 22. Trinetry was my second. Both taught me things I wish I'd known earlier. The honest version. Life, Build https://yogeshsahu.xyz/log/why-we-built-a-72-pb-pipeline-instead-of-buying-glassnode https://yogeshsahu.xyz/log/why-we-built-a-72-pb-pipeline-instead-of-buying-glassnode Mon, 20 Jul 2026 00:00:00 GMT Glassnode charges $800/mo for data we serve at $30/mo. The moat isn't the data — it's the pipeline. Architecture, Build vs Buy https://yogeshsahu.xyz/log/three-days-shipping-the-portfolio-redesign https://yogeshsahu.xyz/log/three-days-shipping-the-portfolio-redesign Sat, 18 Jul 2026 00:00:00 GMT How I rewrote the home page, added a desktop metaphor, shipped 12 deep case studies, and wrote 12 architecture notes — all in 72 hours. Build https://yogeshsahu.xyz/log/the-427-cost-lesson-bigquery-materialized-views https://yogeshsahu.xyz/log/the-427-cost-lesson-bigquery-materialized-views Tue, 14 Jul 2026 00:00:00 GMT Materialized views took our BigQuery bill from $1,200/mo to $36/mo — a 97% reduction. Cost Engineering, BigQuery https://yogeshsahu.xyz/log/cryptoscore-weights-are-a-product-decision https://yogeshsahu.xyz/log/cryptoscore-weights-are-a-product-decision Fri, 10 Jul 2026 00:00:00 GMT The composite token rating weights change what users see. That makes them a product decision. Architecture, Product https://yogeshsahu.xyz/log/firebase-auth-vs-custom-jwt https://yogeshsahu.xyz/log/firebase-auth-vs-custom-jwt Mon, 06 Jul 2026 00:00:00 GMT Firebase for identity, our own JWT for authorisation. Don't outsource authorisation. Security, Auth https://yogeshsahu.xyz/log/what-happens-when-theres-no-ci-pratyaksha-deploy https://yogeshsahu.xyz/log/what-happens-when-theres-no-ci-pratyaksha-deploy Fri, 03 Jul 2026 00:00:00 GMT A production app with no push-to-deploy pipeline is an incident waiting to happen. DevOps, CI/CD https://yogeshsahu.xyz/log/self-hosting-llms-when-to-buy-vs-run-your-own https://yogeshsahu.xyz/log/self-hosting-llms-when-to-buy-vs-run-your-own Mon, 29 Jun 2026 00:00:00 GMT The break-even threshold for self-hosting beats APIs: ~1,000-1,600 req/day AND 70B+ quality. Cost Engineering, AI https://yogeshsahu.xyz/log/11-days-of-missing-data-backfill https://yogeshsahu.xyz/log/11-days-of-missing-data-backfill Mon, 22 Jun 2026 00:00:00 GMT Backfilling 11 days of OHLCV data isn't a replay — it's data archaeology. Operations, Data Engineering https://yogeshsahu.xyz/log/gcp-to-aws-migration-firewall-health-checks-ssl-idle https://yogeshsahu.xyz/log/gcp-to-aws-migration-firewall-health-checks-ssl-idle Mon, 15 Jun 2026 00:00:00 GMT A one-afternoon migration, two weeks of recovery. Three problems stacked. Infrastructure, Migration https://yogeshsahu.xyz/log/append-vs-upsert-duplicate-key-violations https://yogeshsahu.xyz/log/append-vs-upsert-duplicate-key-violations Thu, 28 May 2026 00:00:00 GMT A 9% failure rate traced to writing to two databases with different write strategies. Database, Data Engineering https://yogeshsahu.xyz/log/workflows-that-disable-themselves-github-actions-60-day-trap https://yogeshsahu.xyz/log/workflows-that-disable-themselves-github-actions-60-day-trap Sun, 10 May 2026 00:00:00 GMT Five repos had cron workflows silently disabled by GitHub after 60 days without a commit. DevOps, CI/CD https://yogeshsahu.xyz/log/the-ssh-key-that-nobody-rotated https://yogeshsahu.xyz/log/the-ssh-key-that-nobody-rotated Sat, 25 Apr 2026 00:00:00 GMT A broken SSH deploy job hid behind a green workflow for three weeks. Security, DevOps https://yogeshsahu.xyz/log/the-instagram-auth-that-broke-10-workflows https://yogeshsahu.xyz/log/the-instagram-auth-that-broke-10-workflows Wed, 08 Apr 2026 00:00:00 GMT Ten GitHub Actions workflows failed simultaneously. The root cause was one expired session file. Operations, Security