https://letsbuildabot.com/ Build sheets and guides for making AI agents, putting AI into the things you already use, and building practical robots. en Tue, 15 Sep 2026 09:00:00 +0000 https://letsbuildabot.com/guides/what-is-a-bot/ https://letsbuildabot.com/guides/what-is-a-bot/ Guides Tue, 15 Sep 2026 09:00:00 +0000 "Bot" covers eight genuinely different kinds of software, from a fifty-line scraper to a multi-agent system. Grouped by the job they do, with the honest cost and difficulty of each. https://letsbuildabot.com/projects/email-summary-telegram-bot/ https://letsbuildabot.com/projects/email-summary-telegram-bot/ Build sheets Mon, 14 Sep 2026 09:00:00 +0000 Every morning at 7am, a Telegram message with the three emails that actually need you and a one-line summary of each. https://letsbuildabot.com/guides/bots-are-agents-without-the-meter/ https://letsbuildabot.com/guides/bots-are-agents-without-the-meter/ Guides Sun, 13 Sep 2026 09:00:00 +0000 A bot isn't the primitive thing agents replaced — it's the part of an agent whose decision has already been made, running reliably at zero marginal cost. Where to spend a model, and where not to. https://letsbuildabot.com/guides/ai-scheduling-two-ways/ https://letsbuildabot.com/guides/ai-scheduling-two-ways/ Guides Fri, 11 Sep 2026 09:00:00 +0000 One route has a cost per run and the other doesn't. Invisible at once a day, decisive at a thousand — with the arithmetic, the task ceilings, and how to choose. https://letsbuildabot.com/projects/spreadsheet-that-thinks/ https://letsbuildabot.com/projects/spreadsheet-that-thinks/ Build sheets Thu, 10 Sep 2026 09:00:00 +0000 A custom =ASK() formula in your own spreadsheet. Drag it down a column of customer feedback and get sentiment, category and a summary in three columns. https://letsbuildabot.com/guides/scheduling-code-github-actions-cron/ https://letsbuildabot.com/guides/scheduling-code-github-actions-cron/ Guides Wed, 09 Sep 2026 09:00:00 +0000 Have a model write the script, then let a free scheduler run it. No task limits, no per-run cost, no drift — plus the three Actions traps that catch everyone. https://letsbuildabot.com/guides/chatgpt-scheduled-tasks/ https://letsbuildabot.com/guides/chatgpt-scheduled-tasks/ Guides Mon, 07 Sep 2026 09:00:00 +0000 Task limits by plan, event triggers, and the memory gap that makes change detection the one thing this shape is worst at. https://letsbuildabot.com/projects/package-detector-camera/ https://letsbuildabot.com/projects/package-detector-camera/ Build sheets Sun, 06 Sep 2026 09:00:00 +0000 A small camera by your door that watches for a delivery, sends you a photo and a description, and ignores the cat. https://letsbuildabot.com/guides/claude-scheduled-tasks/ https://letsbuildabot.com/guides/claude-scheduled-tasks/ Guides Sat, 05 Sep 2026 09:00:00 +0000 Built for recurring work rather than reminders, with connectors to the systems the work lives in — and one caveat about local folders. https://letsbuildabot.com/guides/gemini-scheduled-actions/ https://letsbuildabot.com/guides/gemini-scheduled-actions/ Guides Thu, 03 Sep 2026 09:00:00 +0000 Responses are prepared in advance, so anything time-sensitive arrives stale. What that rules out, and what it's genuinely good for. https://letsbuildabot.com/projects/ai-code-review-that-catches-things/ https://letsbuildabot.com/projects/ai-code-review-that-catches-things/ Build sheets Wed, 02 Sep 2026 09:00:00 +0000 A command you run before committing that reviews only your diff against rules you set, and stays quiet when there's nothing to say. https://letsbuildabot.com/guides/web-scraping-tools-compared/ https://letsbuildabot.com/guides/web-scraping-tools-compared/ Guides Tue, 01 Sep 2026 09:00:00 +0000 These five tools are not alternatives to each other — most of them do different jobs and two of them are usually used together. A decision tree, a comparison table, and the mistakes that cost people weeks. https://letsbuildabot.com/guides/where-to-run-a-bot/ https://letsbuildabot.com/guides/where-to-run-a-bot/ Guides Sun, 30 Aug 2026 09:00:00 +0000 Scheduled, always-listening, request-driven or heavy — each shape has a different right host. Real costs, the GitHub Actions traps, and the four things that break in production. https://letsbuildabot.com/projects/price-change-watcher/ https://letsbuildabot.com/projects/price-change-watcher/ Build sheets Sat, 29 Aug 2026 09:00:00 +0000 A script that watches any set of pages — prices, job boards, policy pages — and messages you only when something you care about actually changed. https://letsbuildabot.com/guides/original-content-real-data/ https://letsbuildabot.com/guides/original-content-real-data/ Guides Fri, 28 Aug 2026 09:00:00 +0000 Fluent writing is now free, so it signals nothing. First-hand data still can't be faked — and collecting it systematically is a bot problem a single person can solve. https://letsbuildabot.com/guides/bot-libraries-by-job/ https://letsbuildabot.com/guides/bot-libraries-by-job/ Guides Wed, 26 Aug 2026 09:00:00 +0000 Fetching, parsing, driving a browser, crawling, scheduling, talking to chat platforms, storing results, staying unblocked. What to reach for in each group, and what to ignore. https://letsbuildabot.com/projects/scrape-javascript-site-playwright/ https://letsbuildabot.com/projects/scrape-javascript-site-playwright/ Build sheets Tue, 25 Aug 2026 09:00:00 +0000 A scraper that drives a real browser to reach data that only exists after the page's JavaScript runs — plus the trick that lets you skip the browser entirely half the time. https://letsbuildabot.com/guides/data-sources-for-bots/ https://letsbuildabot.com/guides/data-sources-for-bots/ Guides Mon, 24 Aug 2026 09:00:00 +0000 Check for an API before you write a scraper. Free tiers, real limits and licence traps across finance, weather, books, maps, government data and a dozen more domains.