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    Kolkata Gold PriceWeb app · Recorded 18K, 22K and 24K gold rates for Kolkata, in English and Bengali.
  • FeedKeeperBrowser extension · Hides the YouTube videos you don't want. Keeps the ones you came for.
  • Blog
    A Napoleonic cipher and Grad's conjecture: what AI actually didGPT-6 Astra helped decode an 1809 cipher letter to General Marmont and find counterexamples to Grad's 1967 plasma conjecture. What happened, and what it means.
  • How to stop AI-built websites looking the sameWhy sites built by AI coding agents look alike, and the tools that help: Hallmark, Impeccable, the 21st.dev MCP, Archify for diagrams, and asking for variants.
  • FeedKeeper: a YouTube feed filter that works by categoryWhy we built FeedKeeper, a Chrome extension that hides the kinds of YouTube videos you choose from your home feed and Up next, and how its three modes work.
  • Free AI tools worth trying: job search, video, browsing and moreEight open-source AI tools from this month's GitHub trends, checked against their own docs: what each does, what it costs, how to install it, and the catch.
  • Gemini 4 Argon vs GPT-6.1 Sol vs Claude Sonnet 5.5Three frontier models launched in three days. Prices, limits, benchmarks, cost per task and availability for Gemini 4 Argon, GPT-6.1 Sol and Claude Sonnet 5.5.
  • Installing Claude Code skills and MCP servers safely: a checklistAgent skills and MCP servers run with your permissions. Real incidents, what to check before you install one, and how to limit what it can reach.
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Products

Kolkata Gold Price. Kolkata Gold Price needs no account or personal details. Its privacy policy says Google Analytics and Google AdSense are planned, and that they may use cookies once enabled.

FeedKeeper. FeedKeeper has no server and no analytics. Video titles, channel names and, unless you turn it off, descriptions and tags go to OpenRouter with your own API key; nothing about you, such as watch history or cookies, is sent.

Questions: contact@byteshades.com