AI Dev Notes

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Starting a new chatbot project and stuck choosing between OpenAI and Google Gemini? You're not alone. Both APIs are powerful, but they have real, practical differences that will affect your budget, your architecture, and the quality of your bot's responses. This guide breaks down everything side by side — pricing tiers, rate limits, model capabilities, and code examples — so you can make a confident, informed decision before writing a single line of production code. Table of Contents The 2026 Landscape: OpenAI vs Gemini at a Glance Pricing Breakdown: What You'll Actually Pay Rate Limits: How Fast Can Your Bot Go? Response Quality: Where Each Model Shines Setting Up Both APIs: A Practical Walkthrough Code Comparison: Same Chatbot, Two APIs Building an Abstraction Layer to Switch Providers Decision Framework: Which One Should You Pick? Conclusion 🗺️ The 2026 Landscape: OpenAI vs Gemini at a Glance U...

If your Slack AI bot suddenly starts replying to itself in an endless chain of messages, you've hit one of the most common — and frustrating — pitfalls of building with the Bolt SDK. The root cause is almost always the same: your event listener doesn't distinguish between messages from real users and messages posted by the bot itself. This post walks you through exactly why this happens, how to detect and filter bot-generated messages, and how to build a production-safe message handler that never loops. Table of Contents Why Infinite Loops Happen in Slack Bots Anatomy of a Slack Message Event Filtering Bot Messages in Bolt SDK Advanced Guard Patterns for Production Testing Your Fix Locally with Socket Mode Full Working Example Common Mistakes and How to Avoid Them 🔁 Why Infinite Loops Happen in Slack Bots When your bot posts a message to a Slack channel, Slack fires a message event — just like it does fo...

You registered a slash command with discord.py, typed / in your server, and… nothing. No command. Just silence. This is one of the most common frustrations for Discord bot developers, and the good news is that it almost always comes down to a handful of fixable root causes. This guide walks you through every reason your slash command might not be showing up — from sync issues to permission problems — with working code examples you can run right now. Table of Contents How Slash Commands Actually Work Global vs. Guild Commands: The #1 Source of Confusion Syncing Commands Correctly with discord.py Common Mistakes That Break Registration Bot Permissions and OAuth2 Scopes How to Verify Your Commands Are Actually Registered Full Working Bot Example Troubleshooting Checklist ⚙️ How Slash Commands Actually Work Slash commands in Discord are not like prefix commands ( !help ) that your bot listens for in real time. Ins...

If you've set up a FastAPI server for your KakaoTalk chatbot and Kakao OpenBuilder keeps rejecting your webhook during the verification step, you're not alone. This is one of the most common stumbling blocks when building Kakao chatbots — the verification endpoint has a very specific response format, and even a small deviation causes it to fail silently. This post walks you through exactly what format Kakao expects, how to implement it correctly in FastAPI, and how to debug when things still go wrong. Table of Contents How Kakao Webhook Verification Works The Exact Response Format Kakao Expects FastAPI Implementation Common Mistakes and Fixes Testing Locally with ngrok Full Working Example Debugging Checklist 🔍 How Kakao Webhook Verification Works When you register a webhook URL in Kakao OpenBuilder, the platform sends a GET request to your endpoint to verify it's alive and responding correctly. This...

You ran a few tests, maybe built a small prototype, and then your OpenAI or Anthropic bill arrived — and it was way higher than you expected. Sound familiar? Understanding exactly how tokens are counted, how costs are calculated, and where the hidden waste lives is the single most impactful skill for anyone building with LLM APIs in 2026. This post walks you through the mechanics of tokenization, shows you how to measure usage precisely, and gives you battle-tested strategies to cut costs without sacrificing response quality. Table of Contents What Is a Token, Really? How Costs Are Calculated Counting Tokens Before You Send Where Tokens Hide: The Usual Suspects Strategies to Reduce Token Usage Prompt Compression Techniques Caching and Batching Monitoring and Budgeting in Production Putting It All Together 🔤 What Is a Token, Really? A token is not a word, and it is not a character — it sits somewhere in betw...