IDEAS, DECISIONS & LESSONS

Journal

Notes on AI, architecture and building useful products.

919 articles

22 Jun 2026 · 4 min read

english-lesson

English Lesson — Monday Evening: Review + Speaking Practice

Daily English practice for tech professionals. Evening session — review technical vocabulary from today and speaking confidence exercises.

22 Jun 2026 · 5 min read

agents

AI Agent Verification Gap: Why Your Tests Pass But Agents Fail in Production

When AI agents write their own mocks, green tests prove only internal consistency — not correctness. A tech lead's guide to closing the verification gap before it costs you a production incident.

22 Jun 2026 · 3 min read

english-lesson

English Lesson — Monday Morning: Technical Vocabulary Essentials

Daily English practice for tech professionals. Morning session covering technical vocabulary — scaffold, deprecate, and developer tool terms with pronunciation guide and real-world examples.

21 Jun 2026 · 6 min read

english

Speaking Skills: How to Facilitate Meetings Effectively in English

Master English for meeting facilitation: opening, managing discussion, handling disagreements, closing with clear action items. For Vietnamese tech leads.

21 Jun 2026 · 4 min read

english-lesson

English Lesson — Sunday Evening: Week 25 Recap & Week 26 Preview

Daily English practice for tech professionals. Evening session — speaking practice, review, and real-world scenarios.

21 Jun 2026 · 4 min read

english

Speaking Practice: Pronunciation Drills for Tech Vocabulary

Master pronunciation of 10 words Vietnamese developers often mispronounce: cache, API, schema, queue, boolean, deprecated, and more. With shadowing drills and recordings.

21 Jun 2026 · 7 min read

Building Production-Ready AI Eval Pipelines: A Tech Lead's Practical Guide

How to build AI evaluation pipelines that catch problems before production. The 3-tier eval framework, dataset curation, model-as-judge patterns, and CI/CD integration.

21 Jun 2026 · 5 min read

english-lesson

English Lesson — Sunday Morning: Week 25 Review

Sunday weekly review for tech professionals. Recap 6 key words from Week 25: articulate, constructive, delegate, facilitate, empathize, mingle.

21 Jun 2026 · 5 min read

english-lesson

English Lesson — Sunday Noon: Week 25 Review Special

Sunday noon review special for tech professionals. Top 5 power phrases from Week 25 plus 3 bonus idioms for the workplace — with pronunciation and examples.