https://www.devanshtiwari.com Building AI stock analysis at Metis. Writing about cost-optimized LLM infrastructure, multi-provider routing, and shipping AI products end-to-end. en-us https://www.devanshtiwari.com/blog/nyasa-bot-detection-sdk CAPTCHA and fingerprinting were built for clumsy bots. In 2026, LLM agents fill forms with realistic typing cadence, patch out webdriver flags, and solve CAPTCHA for $0.50. Nyasa adds a third actor to the model: AuthorizedAgent. One SDK, 24 signals, six detection rules. Thu, 21 May 2026 18:30:00 GMT https://www.devanshtiwari.com/blog/nyasa-bot-detection-sdk https://www.devanshtiwari.com/blog/view-counter-nextjs-portfolio-free How to track blog post views in a Next.js portfolio without paying anything. AWS DynamoDB, two API routes, and a five-second delay so bounces do not count. Mon, 11 May 2026 18:30:00 GMT https://www.devanshtiwari.com/blog/view-counter-nextjs-portfolio-free https://www.devanshtiwari.com/blog/2025 The hardest year of my life. A startup failed. I ran out of map. And somehow, I came out the other side a little more real. Sun, 10 May 2026 18:30:00 GMT https://www.devanshtiwari.com/blog/2025 https://www.devanshtiwari.com/blog/sheetforge-google-sheets-backend-data-loss The Google Sheets API drops rows under concurrent writes. It's a documented bug and every wrapper (SheetDB, Sheety, SheetBest) inherits it. I ran the test against all of them. Fifty parallel writes, somewhere between 35 and 47 rows. Every run different. Here is the bug, why a lock doesn't fix it, and what I built instead. Tue, 21 Apr 2026 18:30:00 GMT https://www.devanshtiwari.com/blog/sheetforge-google-sheets-backend-data-loss https://www.devanshtiwari.com/blog/gemini-2-5-flash-37-tokens-debugging I set max_tokens=1000 on a Gemini 2.5 Flash call. Got back 37 tokens. No error, no warning. The real cause was reasoning tokens eating the output budget, a bug documented in 15+ open GitHub issues but missing from every tutorial. Here is the full debugging trail, the three-tier fix with tradeoffs, and a diagnostic script. Sun, 19 Apr 2026 18:30:00 GMT https://www.devanshtiwari.com/blog/gemini-2-5-flash-37-tokens-debugging https://www.devanshtiwari.com/blog/litellm-got-hacked-freellm-alternative The most popular LLM routing library got compromised in a supply chain attack. 95 million monthly downloads. Credential harvester, Kubernetes backdoor, persistent RCE. I built FreeLLM as a narrower, auditable alternative: 6 providers, 262 tests, one job. Mon, 13 Apr 2026 18:30:00 GMT https://www.devanshtiwari.com/blog/litellm-got-hacked-freellm-alternative https://www.devanshtiwari.com/blog/freellm-one-endpoint-five-providers Every LLM provider has a free tier. Combined, they give you ~80 requests per minute. FreeLLM routes your requests across Groq, Gemini, Mistral, Cerebras, and Ollama with automatic failover. One endpoint. Zero cost. Mon, 06 Apr 2026 18:30:00 GMT https://www.devanshtiwari.com/blog/freellm-one-endpoint-five-providers https://www.devanshtiwari.com/blog/how-i-validated-metis-before-writing-code 91% of Indian retail traders lose money. I surveyed 70+ traders and did deep interviews before writing a single line of code. Here is exactly how I validated Metis, what I cut, and the one interview quote that killed 4 features. Sun, 22 Mar 2026 18:30:00 GMT https://www.devanshtiwari.com/blog/how-i-validated-metis-before-writing-code https://medium.com/@devanshtiwari365/why-shopify-will-never-become-amazon-and-why-thats-a-strength-f53294451413?source=rss-68f2c6ce0b54------2 A beginner’s take on why two giants are playing completely different gamesMost people who follow e-commerce assume Shopify and Amazon are on a collision cour... Mon, 02 Mar 2026 20:26:09 GMT https://medium.com/@devanshtiwari365/why-shopify-will-never-become-amazon-and-why-thats-a-strength-f53294451413?source=rss-68f2c6ce0b54------2 https://medium.com/@devanshtiwari365/why-your-env-variables-are-undefined-in-production-and-how-to-fix-it-for-good-bf20bb0ce960?source=rss-68f2c6ce0b54------2 Your app works perfectly in development, with all your API keys loading correctly from your .env file using react-native-dotenv. But when… Continue reading o... Wed, 17 Sep 2025 18:04:43 GMT https://medium.com/@devanshtiwari365/why-your-env-variables-are-undefined-in-production-and-how-to-fix-it-for-good-bf20bb0ce960?source=rss-68f2c6ce0b54------2 https://javascript.plainenglish.io/why-your-keyboardavoidingview-pushes-content-off-screen-and-how-to-actually-fix-it-d54d250ece7f?source=rss-68f2c6ce0b54------2 You reach for KeyboardAvoidingView to prevent the keyboard from hiding your inputs. But instead of a smooth experience, your content gets… Continue reading o... Mon, 15 Sep 2025 00:20:12 GMT https://javascript.plainenglish.io/why-your-keyboardavoidingview-pushes-content-off-screen-and-how-to-actually-fix-it-d54d250ece7f?source=rss-68f2c6ce0b54------2 https://medium.com/@devanshtiwari365/how-to-fix-react-natives-most-annoying-error-b5fe8c8871fa?source=rss-68f2c6ce0b54------2 You’re working on your React Native app. You save a file, the app reloads, and then you see it. The red screen. Continue reading on Medium » Sat, 13 Sep 2025 05:16:10 GMT https://medium.com/@devanshtiwari365/how-to-fix-react-natives-most-annoying-error-b5fe8c8871fa?source=rss-68f2c6ce0b54------2 https://medium.com/codetodeploy/that-cryptic-zod-error-just-wasted-your-afternoon-lets-fix-that-forever-cef47f9956bd?source=rss-68f2c6ce0b54------2 You’ve probably typed import { z } from 'zod' a thousand times, but do you really know what's happening under the hood? It's time to pull… Continue reading o... Wed, 10 Sep 2025 13:09:54 GMT https://medium.com/codetodeploy/that-cryptic-zod-error-just-wasted-your-afternoon-lets-fix-that-forever-cef47f9956bd?source=rss-68f2c6ce0b54------2 https://medium.com/@devanshtiwari365/stop-writing-useless-commits-the-2025-guide-to-commit-sanity-17f6fcce0222?source=rss-68f2c6ce0b54------2 Ever scrolled through a git log and felt like you were deciphering an ancient, cryptic scroll? "Fixed stuff," "changes," "commit" – sound… Continue reading o... Tue, 09 Sep 2025 11:11:36 GMT https://medium.com/@devanshtiwari365/stop-writing-useless-commits-the-2025-guide-to-commit-sanity-17f6fcce0222?source=rss-68f2c6ce0b54------2