English versions of the posts, translated with AI from the Vietnamese originals.
A Telegram bot is a small application that runs in Telegram and is controlled through the Bot API. How to create a bot using BotFather, getUpdates and webhooks, sending limits, group privacy settings, token security, and my experience using bots for business alerts at OPCAIOS.
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Zalo OA is the official business account on Zalo. How to create and verify, types of messages (consultation, 48-hour frame, ZNS), pricing tables for plans from 1/6/2026, conditions for API integration with CRM and real experience from OPCAIOS.
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RAG is a method to pull information from a knowledge base into the prompt so AI can answer based on real data. The working steps, when you don't need RAG, why retrieval fails and how to fix it according to Anthropic's research, pgvector, Vietnamese embedding models and OPCAIOS's real experience.
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Obsidian is a free note-taking app that stores Markdown files on your device, linking notes together like a personal Wikipedia. How data is stored, Canvas and Bases features, pricing for Sync and Publish, safe plugins, and how to use it with AI agents.
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GitHub is a software development platform built on Git: store code in the cloud, collaborate, test and deploy. How it differs from Git, the Actions, Pages, Copilot features, pricing plans, how to get started and considerations when letting AI agents fix your code.
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Email marketing is sending commercial messages via email to nurture and sell. Requirements from Gmail and Yahoo (SPF, DKIM, DMARC, one-click unsubscribe), regulations on advertising emails in Decree 91/2020/NĐ-CP and processes for small businesses.
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SEO is optimizing to be found on search engines; GEO is optimizing to be read and cited by AI. Similarities and differences, what to follow from Google, AI bots, llms.txt, how to write paragraphs that are easy to cite, and OPCAIOS's experience building their own measurement tool.
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Content marketing is a marketing approach that creates and distributes valuable content to attract and retain a defined audience. CMI's definition, history, one-page strategy, Google's helpful content standards, and how to use AI without creating empty content.
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Growth hacking is a way to grow through continuous testing cycles: try fast, measure, keep what works. The original definition from Sean Ellis (2010), five-step process, AARRR framework, examples from Hotmail, Dropbox, Airbnb, and risks to avoid.
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Vibe marketing is doing marketing with an AI agent: one person handling the workload of an entire team. Two meanings of the term (Isenberg and brand), a four-step process with review, the risk of bland content, and how to get started for small businesses.
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Vibe coding is a way to write software by describing to AI what code to write without reviewing the code. Andrej Karpathy's original definition, how it differs from AI-assisted programming, risks with data (Veracode 2025), and 8 habits to do it with discipline.
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A solo company achieves maximum efficiency by avoiding three losses of multi-person organizations: context that can't be transmitted, misaligned goals, diluted vision. But when everyone can do it, that efficiency becomes the floor. Two things remain scarce: judgment and trust.
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Skill Anatomy is a free Agent Skill for Claude Code: it turns a question into an isometric machine with step-by-step buttons, windows into the main components, and data from a model. Setup, commands, limits, plus video from the original post by Elvar Sun.
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REA (Reverse Engineer Anything) is an open-source MCP server that helps AI agents reverse engineer software: what it can analyze, how to install via npx, requires Hopper/Ghidra/IDA, limitations, privacy, and legal boundaries.
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How to create a 20-second product launch video using Claude Opus 5.5 and Remotion: assigning frame numbers to each event, writing BRIEF.md, fixing errors by frame, and packaging it as a Launch Clip. Rewritten from @beamnxw's post with all illustrations included.
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Guide to building brand videos with code using Claude Opus 5.5: create a brand folder, 8 reference repositories, install HyperFrames, Remotion, claude-animation skills, with images and videos from the original post by Hamza Khalid.
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Pipedrive is a CRM focused on sales pipeline management for small sales teams. Package options and pricing, API token limits, webhooks, MCP, and when to choose Pipedrive instead of HubSpot, Salesforce or building your own CRM.
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Salesforce is a cloud CRM platform for sales, customer service, marketing and AI. Packages and pricing from 25 USD per user, API connections, events, MCP, and when small businesses should choose it.
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HubSpot is a CRM platform that combines marketing, sales, and customer support. What's included in the free CRM plan, pricing for paid plans, how to connect APIs, webhooks, MCPs, and when you should build your own CRM instead of using HubSpot.
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Shopify is an all-in-one e-commerce platform to open an online store. Pricing for plans, third-party payment fees, how to open a store, webhooks and APIs, and when to use Shopify instead of building your own website.
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Stripe is a global online payment platform. How it works, fees, webhooks and API keys; Stripe doesn't officially support Vietnam on their official list, but domestic sellers can collect payments with PayOS and SePay instead.
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Cloudflare is a DNS, CDN, WAF, and DDoS protection service that sits in front of your website. Pricing for different plans, how to add your website, SSL/TLS modes, Tunnel, Workers, Turnstile, and what error 522 means.
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Supabase is a development platform built around a Postgres database, with Auth, API, Storage, Realtime, Edge Functions, and vector capabilities. Package pricing, Row Level Security, self-hosting with Docker, and connecting AI through MCP.
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Artificial analytics is a general term for using artificial intelligence to analyze data — content, customers, operations — rather than the name of a specific tool. If you
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Airtable is an online database like a spreadsheet: bases, linked tables, views, interfaces and automation. Pricing of packages, free plan limits, how to get started and comparison with Notion, Google Sheets.
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Notion is an all-in-one workspace: pages, blocks, databases with multiple views, and AI. Pricing for plans, how to set up in 30 minutes, connect with n8n, Zapier, Make and MCP.
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Make.com is a visual automation platform that connects applications using scenarios, routers, and filters. How credits are calculated, webhooks, error handling, creating your first scenario, and comparing with Zapier and n8n.
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Claude Sonnet 5.5 launched on 28/9/2026 at half the price of Opus 5.5. Benchmarks according to Anthropic, pricing table, when to choose Sonnet or Opus, effort levels, how to use in Claude Code and safety notes.
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Zapier is a no-code automation service that connects over 9,000 apps. How to create your first Zap, understand tasks and the free plan, compare with Make and n8n, and tips to save on quota.
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n8n is an automation platform that connects applications using drag-and-drop diagrams, available for self-hosting or cloud use, and supports AI agents. How to install, your first workflow, common errors, security, and comparisons with Make and Zapier.
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Graph engineering is drawing AI processes as diagrams with nodes and arrows so that independent tasks run in parallel. Fake edge testing, the diamond pattern, independent context checkers, and when not to use them.
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A Skill is a directory guide for Claude to do a certain type of work the way you want. This post explains how skills work, how to write SKILL.md, how to install and call skills in Claude Code, Claude.ai and API, along with safety notes.
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AI writes code with wrong versions because training data stops at a point while libraries keep changing. How to pin versions, have the machine verify, and patch the right places.
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There is no best AI model for everything. How to read benchmarks correctly, calculate cost per task instead of per token, a recommendation table by work group, and a process to test models in an afternoon.
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Two errors when asking AI to build 3D in Blender: the API changed after the training data, and invisible geometry errors when rendering. Version pinning workflow, code-based counting, and numeric patching, plus sample prompts.
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Analysis of the Derek Mercer phenomenon and the process of building an AI character: describe it in one sentence, design for the thumbnail, edit images instead of writing new prompts, give your character a repeating context, costs and risks.
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A webhook is how software automatically notifies each other when something happens: a new order, money arrives, a new form submission. How it works, checking HMAC signatures, preventing duplicate processing, and receiving webhooks with n8n, Make, Zapier.
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An API is a communication interface that allows software to talk to each other. Endpoints, methods, API keys, JSON, webhooks, how to use without coding with n8n, Make, Zapier, plus real examples from opcaios.org.
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MCP (Model Context Protocol) is an open standard that helps Claude, ChatGPT, and Cursor connect with files, Google Drive, CRM, and websites in a unified way. How it works, how to get started, and the risks you should know about.
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Awwwards is an online platform where website projects are submitted for the community and industry judges to evaluate, rank, and honor. For designers and developers,
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No need to know code, no need to understand math. Just the right mental framework to know what AI can do, what it can't do, and how to make it work for you.
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If you search "g al studio" on Google, you're likely looking for Google AI Studio — Google's platform for experimenting with Gemini models. This post explains what this tool is, even though
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Artificial Analysis is an independent analysis platform that measures the performance of AI models and API/inference providers using public data, not manufacturer advertising. It
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Orca is an open source application to run Claude Code, Codex, OpenCode, Oh My Pi and over 30 other coding agents in parallel, each agent with its own git worktree, tracked in one place.
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A 5-step process and 7-step template for delegating weekly reports, auditing ad accounts, and monitoring spending pace to AI agents — you only keep the decision-making part.
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Oh My Pi (omp) is an open source coding agent running in the terminal, compatible with over 60 AI model providers, with built-in LSP, debugger, subagent and web search.
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Hugging Face's MCP Course is a free course with hands-on practice and certification that helps people with basic programming skills build AI applications using the Model Context Protocol.
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Kaggle generative AI course is usually the 5-Day Gen AI Intensive by Google and Kaggle together: free, self-paced, with whitepapers and codelabs that run directly on Kaggle.
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How I divide AI into a small team: a coordinating brain, executing hands, a knowledge repository and three-layer memory, so one person can still do many things.
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Five steps to choose which tasks to hand over to AI first: log a week of work, score each task, build the smallest version, have someone review the final step, and document the process.
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Numbers without context don't help you. What AI does well, what it doesn't do well, and five questions I use to evaluate an AI tool before paying for it.
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