Janaka PremathilakaClear, hands-on articles on Java, Kafka, RAG, agents and evals, plus academy modules and lab notes.https://janaka.me/2026-10-02T00:00:00ZJanaka Premathilakahttps://janaka.me/scripts/gen-feed.pyBlitzMath: A Live Classroom Maths Game with One Durable Object per Roomhttps://janaka.me/blog/posts/blitzmath-realtime-classroom-game.html2026-10-02T00:00:00Z2026-10-02T00:00:00ZHow BlitzMath runs live maths games for a whole class on Cloudflare Workers: one Durable Object per room as referee, alarms as the clock, no database or accounts.AssetCare case study: Java 25, Spring Boot, Angular and Kubernetes in productionhttps://janaka.me/lab/assetcare/2026-09-23T00:00:00Z2026-09-30T00:00:00ZAssetCare is a production-deployed Java 25, Spring Boot, Angular and Kubernetes application demonstrating modern full-stack, cloud-native and AI-assisted software engineering. Architecture…From Idea to Production: Building AssetCare with Java 25, Spring Boot, Angular, Kubernetes and AIhttps://janaka.me/blog/posts/assetcare-idea-to-production.html2026-09-23T00:00:00Z2026-09-30T00:00:00ZHow a Java 25, Spring Boot 4.1 and Angular 22 application went from a prototype to a live Kubernetes deployment on Hetzner with Helm, Keycloak, PostgreSQL and Let's Encrypt, what broke on the way…From code to production: building AssetCare — a learning serieshttps://janaka.me/academy/assetcare/2026-09-23T00:00:00Z2026-09-30T00:00:00ZA fourteen-module learning series on the AssetCare reference application: architecture, Spring Boot, Angular, PostgreSQL and Liquibase, Keycloak, Docker, Kubernetes, Helm, Terraform, HTTPS, CI/CD…Claude Code configuration, top down: CLAUDE.md, settings, hooks, skills, subagents, plugins and contexthttps://janaka.me/academy/modules/2026/FSE/claude-code-configuration.html2026-09-21T00:00:00Z2026-09-25T00:00:00ZOne diagram of how Claude Code is configured, then twelve levels that zoom into it: the two layers, where every file lives and who wins, what loads into context and when, the agent loop and its 33…MCP primitives lab: one server, one client, every feature, both handshakeshttps://janaka.me/academy/modules/2026/FSE/mcp-primitives-lab.html2026-09-17T00:00:00Z2026-09-25T00:00:00ZLearn the Model Context Protocol by watching it run: a verified Python server and client that exercise tools, resources, prompts, sampling, roots, elicitation and progress over stdio and Streamable…From CRUD to production: Angular + Spring Boot, served as a seven-course mealhttps://janaka.me/academy/production-ready-spring-angular/2026-09-16T00:00:00Z2026-09-30T00:00:00ZAssetCare, a complete Angular 22 + Spring Boot 4.1 reference application: architecture, PostgreSQL migrations, a production API, the SPA, tests and scans, observability, Helm, K3s on one small…The Spring ecosystem, and what Spring AI can do nowhttps://janaka.me/academy/modules/2026/FSE/spring-ecosystem-and-spring-ai.html2026-09-16T00:00:00Z2026-09-25T00:00:00ZSpring Boot from 1.0 to 4.x in working examples, then a hands-on tour of Spring AI 2.0: ChatClient, structured output, tools, memory, RAG, MCP, evaluation and agent patterns.MCP end to end: protocol, Java and Python servers, and the agent that uses themhttps://janaka.me/academy/modules/2026/FSE/mcp-end-to-end.html2026-09-16T00:00:00Z2026-09-25T00:00:00ZThe Model Context Protocol from first principles to production: the wire format, tools, resources, prompts, elicitation, transports, the 2026 stateless revision, security, and a verified Java…Java, release by release: 8 to 27https://janaka.me/academy/modules/2026/FSE/java-evolution-8-to-27.html2026-09-16T00:00:00Z2026-09-25T00:00:00ZEvery Java release from 8 (2014) to 27 (September 2026): the features that mattered, why they mattered, and a working example for each, from lambdas to post-quantum TLS.Dead-letter topics in Spring Kafka: retries and replayhttps://janaka.me/blog/posts/spring-kafka-deadletter.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZHow to handle poison pills in Spring Kafka with DefaultErrorHandler, @RetryableTopic, DeadLetterPublishingRecoverer and a governed replay path.RAG with FAISS: Chunking, MMR and Re-Rankinghttps://janaka.me/blog/posts/rag-faiss-patterns.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZWhy naive top-k retrieval fails, how to chunk and index with FAISS, and how MMR and cross-encoder re-ranking fix it for a regulated bank.Templateshttps://janaka.me/academy/modules/2026/FSE/promting/templates.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZTemplates — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Strategieshttps://janaka.me/academy/modules/2026/FSE/promting/strategies.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZStrategies — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.References and Source Noteshttps://janaka.me/academy/modules/2026/FSE/promting/references.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZReferences and Source Notes — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.RAG Promptinghttps://janaka.me/academy/modules/2026/FSE/promting/rag.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZRAG Prompting — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.GPT-5.4 Prompting Guidehttps://janaka.me/academy/modules/2026/FSE/promting/gpt54.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZGPT-5.4 Prompting Guide — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Glossary in Easy Englishhttps://janaka.me/academy/modules/2026/FSE/promting/glossary.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZGlossary in Easy English — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Latest Gemini Prompting Guidehttps://janaka.me/academy/modules/2026/FSE/promting/gemini.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZLatest Gemini Prompting Guide — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Foundationshttps://janaka.me/academy/modules/2026/FSE/promting/foundations.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZFoundations — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Developer Promptshttps://janaka.me/academy/modules/2026/FSE/promting/developer.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZDeveloper Prompts — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Most Useful Developer Task Promptshttps://janaka.me/academy/modules/2026/FSE/promting/developer-tasks.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZMost Useful Developer Task Prompts — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Debugging Playbookhttps://janaka.me/academy/modules/2026/FSE/promting/debugging.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZDebugging Playbook — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.GPT-5.4 vs Gemini: Practical Prompting Differenceshttps://janaka.me/academy/modules/2026/FSE/promting/comparison.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZGPT-5.4 vs Gemini: Practical Prompting Differences — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Cheat Sheethttps://janaka.me/academy/modules/2026/FSE/promting/cheatsheet.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZCheat Sheet — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Agent Promptinghttps://janaka.me/academy/modules/2026/FSE/promting/agents.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZAgent Prompting — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Quantum Use Caseshttps://janaka.me/academy/modules/2026/FSE/entanglement/use-cases.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZQuantum Use Cases — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Referenceshttps://janaka.me/academy/modules/2026/FSE/entanglement/references.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZReferences — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Quantum Computing Explainedhttps://janaka.me/academy/modules/2026/FSE/entanglement/quantum-computing.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZQuantum Computing Explained — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.Entanglement Explainedhttps://janaka.me/academy/modules/2026/FSE/entanglement/entanglement.html2026-09-15T00:00:00Z2026-09-25T00:00:00ZEntanglement Explained — a Janaka Academy module from the Elite Full-Stack Engineering 2026 curriculum by Janaka Premathilaka.