Real commands. Real numbers.
Writeups from the labs we build — measured, reproducible, free.
Your Whole Repo in One Prompt — DeepSeek V4 Made 1M-Token Context Cheap
DeepSeek V4 holds a 1,048,576-token context. I fit FastAPI's entire 1,136-file codebase — 731k tokens — into one prompt for about ₹10. The real numbers and how to do it.
Sivaram Raju · 23 Aug 2026 
DevOps & tooling · 2 min read Hundreds of Free APIs in One Repo — No Key, No Signup (I Called 5 Live)
One GitHub repo lists hundreds of free public APIs across 50+ categories. Five that need no key or signup, with the exact curl commands you can run right now.
Sivaram Raju · 23 Aug 2026 
AI agents & models · 2 min read One Port for Every AI Tool — Stop Copying MCP Configs Into Five Apps (Toolport)
Every AI app wants its own MCP config for the same servers. Toolport is a free local gateway: register each MCP server once, point every client at one port. The exact setup.
Sivaram Raju · 23 Aug 2026 
Cloud & AWS · 2 min read Any Document to Clean Markdown, Free and Offline (anydoc by Firecrawl)
Turn PDFs, Word, PowerPoint, Excel and more into clean Markdown for your AI — free, open source, offline, in milliseconds. The one command, and the honest limits.
Sivaram Raju · 23 Aug 2026 
AI agents & models · 3 min read Let Your AI Agent Run Code — Without Handing It Your Whole Laptop (OpenSandbox)
AI agents run code on your machine by default — your files, your keys. OpenSandbox gives the agent a sealed room instead. Free, open-source, runs on plain Docker. The exact setup.
Sivaram Raju · 23 Aug 2026 
AI agents & models · 3 min read One File That Locks Down an AI Agent (Tested Live)
Telling an AI agent it has no internet is not a control. One Claude Code sandbox file gives it exactly one allowed domain and zero readable keys — tested live, with the four gotchas nobody documents.
Sivaram Raju · 1 Aug 2026 
AI agents & models · 4 min read Opus 5 vs Kimi K3: The Cost Sheet — Same Real Tasks, Every Receipt
We gave Claude Opus 5 and Kimi K3 the same three production tasks — a store page, an ops dashboard, and a rate limiter with 12 hidden tests. Both scored 12/12. The full cost sheet, the decision rules, and how to run this test yourself.
Sivaram Raju · 26 Jul 2026 
AI agents & models · 5 min read The AI Agent Credential Safety Checklist
AI agents can now log into websites for you. Where the password lives decides what can leak. The 7-point checklist: runtime injection, per-task approval, the calendar-invite attack, and what never to hand an agent.
Sivaram Raju · 23 Jul 2026 
AI agents & models · 4 min read Free Local OCR for Long PDFs — Baidu's Unlimited-OCR, Step by Step
Baidu open-sourced Unlimited-OCR: a 3B model that turns long PDFs into structured text, free, MIT-licensed, running on a laptop. The exact working commands, including the prompt gotcha.
Sivaram Raju · 23 Jul 2026 
AI agents & models · 4 min read Run Coding Agents for Free — Safely (free-claude-code + Ollama)
free-claude-code routes the Claude Code interface to 25+ providers — free tiers or a fully local model. The complete safe setup: read the installer first, then run it on Ollama for $0.
Sivaram Raju · 23 Jul 2026 
AI agents & models · 5 min read Scan Your Own Code With Free AI Agents (deepsec, Step by Step)
Vercel Labs open-sourced deepsec, an AI security scanner that finds real vulnerabilities coding agents miss. Run it on your side project for almost nothing — full step-by-step guide, plus two more free AI scanners.
Sivaram Raju · 23 Jul 2026 
DevOps & tooling · 4 min read 10 Terminal Tools That Feel Like Cheating (Start With croc)
Send any file between two computers with one command, jump to any folder, search anything instantly. 10 free terminal tools every developer should know, with the exact commands.
Sivaram Raju · 23 Jul 2026 
AI agents & models · 3 min read Kimi K3 Starter Guide — What It Is, What It Beats, and How to Use It Free
Moonshot's Kimi K3: 2.8T parameters, #1 in frontend code on Arena above Claude. How to try it free, what it's actually good at, what it costs, and when to use Claude instead.
Sivaram Raju · 20 Jul 2026 
AI agents & models · 3 min read Kimi CLI Setup Guide: China's Answer to Claude Code
Kimi CLI is Moonshot AI's terminal coding agent, running Kimi K3 — the model that topped Code Arena's frontend board. How to install it, what it costs, and when to use it versus Claude Code.
Sivaram Raju · 19 Jul 2026 
AI agents & models · 3 min read OmniRoute Setup Guide: One Free Endpoint That Never Stops Coding
OmniRoute is a free local AI gateway: one endpoint fronting 231+ providers (50+ free), with auto-fallback when you hit rate limits. Full setup guide plus how to wire it into Claude Code.
Sivaram Raju · 19 Jul 2026 
AI agents & models · 2 min read Understand Any Codebase in 10 Minutes — graphify Turns Code Into a Map You Can Question
graphify (80,000+ GitHub stars) turns any folder of code into an interactive knowledge graph you can query. We mapped python-requests live and asked it how a request reaches the network — it answered file by file. Full guide.
Sivaram Raju · 14 Jul 2026 
Databases · 2 min read 1.28s → 6ms With Five Lines — Add Redis Caching to a Real API
We built a real API over a 20-million-row Postgres table (~1 second per call), added five lines of Redis caching, and the same call dropped to 6 milliseconds. Every command to reproduce it, free.
Sivaram Raju · 13 Jul 2026 
AI agents & models · 2 min read My A.I. Bill Dropped 99% — The Headroom Setup Cheat-Sheet
Headroom compresses what your AI agent sends before it reaches Claude or GPT. We compressed a real 3,000-line build log from 133,385 tokens to 1,090 — 99% — and kept the originals in a local cache. Full setup cheat-sheet.
Sivaram Raju · 12 Jul 2026 
DevOps & tooling · 2 min read I Killed a Live Server and the Site Survived — Build This Load Balancer in 10 Minutes
We built an nginx load balancer in front of two tiny Python servers, killed one on camera, and the site kept answering — zero failed requests. Every command to build it yourself, free.
Sivaram Raju · 11 Jul 2026 
AI agents & models · 3 min read A.I. Wrote My CV for a Real Job — The ai-job-search Quick Start
We pointed the open-source ai-job-search framework (15,000+ GitHub stars) at a real fresher job posting. It scored the fit, drafted a tailored 2-page CV and cover letter, had a second AI review them, and ATS-checked the PDF. Full setup guide, with the India adaptation.
Sivaram Raju · 10 Jul 2026 
Databases · 3 min read One Line Made My Database 300× Faster — Indexes Explained (Run It Yourself)
We inserted 50 million rows into Postgres and searched without an index: 11.6 seconds. Added one CREATE INDEX line: 32 milliseconds. Every command to reproduce it yourself, free.
Sivaram Raju · 9 Jul 2026 
AI agents & models · 2 min read 20 Lakh Free AI Agent Skills — The 5 to Install First
Over 21 lakh free open-source SKILL.md files exist for Claude agents. Here are the 5 best skills to install first, with the one-command install and a real test run.
Sivaram Raju · 7 Jul 2026 
Free resources · 3 min read The Best Free AI Models Right Now (Including the 1.6T One From a Food-Delivery App)
The 5 best AI models you can use for free right now — including LongCat 2.0, the 1.6-trillion-parameter open model from food-delivery giant Meituan. Links and free tiers inside.
Sivaram Raju · 7 Jul 2026 
AI agents & models · 3 min read Try Claude Fable 5 — The AI America Banned (Free Guide)
Claude Fable 5 was pulled offline by US export controls and is back. Here is the exact 3-step guide to try it free on the Claude Pro trial — plus the story behind the ban.
Sivaram Raju · 7 Jul 2026 
Cloud & AWS · 9 min read Build the 'AWS Guardian': A Serverless AI Bot to Scan Your Account for Security & Cost Risks
Build a production-ready AWS security and cost management chatbot using Amazon Bedrock, Lambda, and DynamoDB. Real-world project that proves you're ready for cloud jobs.
Sivaram Raju · 15 Nov 2025 
Cloud & AWS · 9 min read The 10 Interview Questions That Separate a Junior from a Senior Engineer (Cloud, AI, & Backend)
Practice the 10 real-world technical interview questions for cloud, AI, and backend roles. Includes code, explanations, and runnable examples to get you hired.
Sivaram Raju · 8 Nov 2025 
Cloud & AWS · 10 min read How to Build an Enterprise-Grade RAG Chatbot on AWS with Terraform
Step-by-step guide to building a production-ready RAG chatbot with AWS Bedrock Knowledge Bases, Lambda, and Terraform. Turn your docs into intelligent answers with vector search and AI.
Sivaram Raju · 8 Nov 2025 No posts under this topic yet.