--- title: "Posts by Shreyash Singh | ProductOS" description: "Built ProductOS's AI agent architecture, backend infrastructure, and core product engine from scratch. Deep expertise in scalable systems and applied AI. Writes" url: https://productos.dev/blog/authors/shreyash-singh --- [Back to Blog](https://productos.dev/blog) ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) # Shreyash Singh Built ProductOS's AI agent architecture, backend infrastructure, and core product engine from scratch. Deep expertise in scalable systems and applied AI. Writes about agent pipelines, codegen, and AI engineering. ## Articles by Shreyash [![Vibe coding for beginners: how to start without shipping a mess](https://productos.dev/blog/vibe-coding-for-beginners/opengraph-image?v=2) Vibe Coding](https://productos.dev/blog/vibe-coding-for-beginners) [Vibe coding for beginners: how to start without shipping a mess](https://productos.dev/blog/vibe-coding-for-beginners) A hands-on getting-started guide to vibe coding for beginners: the exact steps to ship your first AI-built app, which to... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Aug 27, 2026 [![The LLM context window, explained (and how to manage it)](https://productos.dev/blog/llm-context-window/opengraph-image?v=2) Context Engineering](https://productos.dev/blog/llm-context-window) [The LLM context window, explained (and how to manage it)](https://productos.dev/blog/llm-context-window) The LLM context window is the model’s working memory, measured in tokens. Here is what it is, why it matters, current 20... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Aug 17, 2026 [![Context engineering vs prompt engineering: the real difference](https://mediumspringgreen-bee-313425.hostingersite.com/wp-content/uploads/2026/03/context-engineering-prompt-engineering-1024x538.jpg) Context Engineering](https://productos.dev/blog/context-engineering-vs-prompt-engineering) [Context engineering vs prompt engineering: the real difference](https://productos.dev/blog/context-engineering-vs-prompt-engineering) Prompt engineering optimizes a single instruction; context engineering designs everything the model sees across many cal... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Aug 14, 2026 [![The best AI coding tools for beginners](https://productos.dev/blog/best-ai-coding-tools-for-beginners/opengraph-image?v=2) Vibe Coding](https://productos.dev/blog/best-ai-coding-tools-for-beginners) [The best AI coding tools for beginners](https://productos.dev/blog/best-ai-coding-tools-for-beginners) The best AI coding tools for beginners in 2026: GitHub Copilot, Cursor, Replit, Lovable, and Bolt.new, compared by price... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Aug 6, 2026 [![The 9 best vibe coding tools in 2026, tested](https://productos.dev/blog/best-vibe-coding-tools-2026/opengraph-image?v=2) Vibe Coding](https://productos.dev/blog/best-vibe-coding-tools-2026) [The 9 best vibe coding tools in 2026, tested](https://productos.dev/blog/best-vibe-coding-tools-2026) We tested the nine best vibe coding tools of 2026, from Cursor and Claude Code to Lovable, Bolt, v0, and Replit. Here is... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Jul 27, 2026 [![The 12 best AI coding tools in 2026, tested and ranked](https://productos.dev/blog/best-ai-coding-tools-2026/opengraph-image?v=2) Vibe Coding](https://productos.dev/blog/best-ai-coding-tools-2026) [The 12 best AI coding tools in 2026, tested and ranked](https://productos.dev/blog/best-ai-coding-tools-2026) I tested the 12 best AI coding tools of 2026, from Cursor to Claude Code to Devin, with verified pricing and one honest... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Jul 21, 2026 [![Cursor pricing explained: plans, limits, and is it worth it? (2026)](https://productos.dev/blog/cursor-pricing/opengraph-image?v=2) Vibe Coding](https://productos.dev/blog/cursor-pricing) [Cursor pricing explained: plans, limits, and is it worth it? (2026)](https://productos.dev/blog/cursor-pricing) Cursor pricing in 2026: Hobby is free, Pro is $20/mo, Pro+ $60, Ultra $200, Teams $40/user. Here is what each plan gets... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Jul 20, 2026 [![The best AI models for coding in 2026](https://productos.dev/blog/best-ai-for-coding-2026/opengraph-image?v=2) Vibe Coding](https://productos.dev/blog/best-ai-for-coding-2026) [The best AI models for coding in 2026](https://productos.dev/blog/best-ai-for-coding-2026) Which AI model is best for coding in 2026? We rank Claude Fable 5, GPT-5.6 Sol, Gemini 3.1 Pro, Kimi K3 and DeepSeek by... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Jul 19, 2026 [![What is spec-driven development? The complete guide (2026)](https://mediumspringgreen-bee-313425.hostingersite.com/wp-content/uploads/2026/05/spec-driven-development-1024x683.jpg) Spec-Driven Development](https://productos.dev/blog/spec-driven-development) [What is spec-driven development? The complete guide (2026)](https://productos.dev/blog/spec-driven-development) Spec-driven development makes a written, reviewable specification the source of truth that AI coding agents build from a... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Jul 17, 2026 [![What is context engineering? The skill replacing prompt engineering](https://mediumspringgreen-bee-313425.hostingersite.com/wp-content/uploads/2026/03/context-is-the-new-code-1024x538.jpg) Context Engineering](https://productos.dev/blog/context-engineering) [What is context engineering? The skill replacing prompt engineering](https://productos.dev/blog/context-engineering) Context engineering is the discipline of deciding what an AI model sees at each step: instructions, documents, tools, an... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Jul 17, 2026 [![How do you run AI agents in production? The 2026 playbook](https://productos.dev/blog/ai-agents-in-production/opengraph-image?v=2) AI Engineering in Production](https://productos.dev/blog/ai-agents-in-production) [How do you run AI agents in production? The 2026 playbook](https://productos.dev/blog/ai-agents-in-production) Most agent demos die before production. This playbook covers the five disciplines that keep agents alive in front of rea... ![Shreyash Singh](https://productos.dev/team/shreyash-singh.webp) [Shreyash Singh](https://productos.dev/blog/authors/shreyash-singh) • Jul 17, 2026