01 · System Design3 AM Page: Our URL Shortener's Database Melted Under a Billion Redirects
Learn how to design a URL shortener that survives a billion redirects a day using Cloud CDN, cache keys, and smart redirect codes.
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Edition of 29 Oct 202601 · System Design
02 · AWS & DevOpsThe HR Chatbot That Almost Leaked Salary Bands: Lessons from Bedrock Guardrails
03 · Kubernetes & DockerOur 1.2GB Node Image Shipped a Shell, npm, and a CVE We Never Scanned For
04 · Next.js & ReactOur Flash Sale Page Served Stale Prices to Everyone, Including the CEO
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Agentic AI - LangChain, LangGraph, LangSmith, LangFlow and n8nThe Day a Refund Bot Nearly Approved a ₹48,000 Payout Alone
AWS & DevOpsWe Cut a ₹41 Lakh AWS Bill to ₹16 Lakh Without Losing a Single Feature
System DesignThe 40GB Wedding Video That Crashed Our Homegrown Transcoding Fleet
Next.js 16 & React 19The Lab Said 0.9s, Real Phones Said 4.8s: Fixing Core Web Vitals in Next.js 16
Kubernetes & DockerWe Ran docker compose bridge convert Two Days Before Launch. Here's What It Didn't Tell Us
Agentic AI & LangChainWhy Your RAG Bot Lies With a Straight Face, And How to Make It Check Itself
AWS & DevOpsAmazon Q Developer Debugged Our 3 AM ECS Outage Before My Coffee Finished Brewing
Next.js 16 & React 19Why Our Dashboard Took 4.2 Seconds To Paint, And How use() Fixed It
System DesignThe Celebrity Tweet That Broke Our Feed: Fan-out Explained
Kubernetes & DockerThe 3 AM Page That Taught Us Why StatefulSets Alone Don't Run Databases
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Readers’ #15.001 ratingWhy Our Claude Code Agent Almost Ran rm -rf in CI (And How We Locked It Down)
Claude Code · 27 Oct 2026 · 10 min read
5.001 ratingReasoning Models, MCP, and the Plumbing Behind AI Agents in 2026
5.001 ratingAgents API, Agents SDK, or Responses API: The One Decision That Breaks Production
5.001 ratingFive Agent Frameworks, Two We Can Actually Verify: A Documentation-First Comparison
5.001 ratingThe n8n Workflow That Paid Off: Triggers, Agents, Errors, and Queue Mode
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#1 in the communityWhy Your RAG Bot Lies With a Straight Face, And How to Make It Check ItselfBuild an agentic RAG pipeline that plans sub-queries, re-ranks results, and grades its own retrieval before it ever answers.1 like- #2
Five Agent Frameworks, Two We Can Actually Verify: A Documentation-First Comparison - #3
Why Our Next.js Dashboard Froze for 8 Seconds Until Cache Components Fixed It - #4
Azure AI Foundry vs Azure OpenAI: Pick The Right Endpoint First - #5
We Cut a ₹41 Lakh AWS Bill to ₹16 Lakh Without Losing a Single Feature - #6
React 19 in Production: The Checkout Bug That Forced Us to Rewrite Our Forms
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- Step 2The n8n Workflow That Paid Off: Triggers, Agents, Errors, and Queue Mode
- Step 3NewBootstrapping an Agentic AI SaaS to $48k MRR: Next.js, Stripe, Supabase & Self-Hosted n8n Workflows
- Step 4Newn8n for Developers: Webhooks, Code Nodes and AI Agents in One Workflow
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Agentic AINewStop Following Tutorials: Build These 5 Backend Projects Instead- Agentic AI - LangChain, LangGraph, LangSmith, LangFlow and n8nNewThe Day a Refund Bot Nearly Approved a ₹48,000 Payout Alone
- Claude CodeWhy Our Claude Code Agent Almost Ran rm -rf in CI (And How We Locked It Down)
- AI TrendsReasoning Models, MCP, and the Plumbing Behind AI Agents in 2026
- Emerging TechAgents API, Agents SDK, or Responses API: The One Decision That Breaks Production
Agent FrameworksFive Agent Frameworks, Two We Can Actually Verify: A Documentation-First Comparison
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The HR Chatbot That Almost Leaked Salary Bands: Lessons from Bedrock Guardrails
Learn to wire Knowledge Bases and Guardrails into a RAG app so it retrieves facts safely and never improvises sensitive answers.
- RetrieveAndGenerate combines retrieval and generation in one call but needs explicit guardrail configuration per request.
- Ingestion is asynchronous, so poll GetIngestionJob before trusting a knowledge base to answer queries.
- Guardrails evaluate both the input prompt and the model output separately, so test each side independently.
MCB EditorialExplore By Category
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MCB EditorialKubernetes & DockerOur 1.2GB Node Image Shipped a Shell, npm, and a CVE We Never Scanned For
Learn to rebuild container images as multi-stage, distroless, least-privilege artifacts that pass audit and still deploy in seconds.
MCB EditorialSystem Design3 AM Page: Our URL Shortener's Database Melted Under a Billion Redirects
Learn how to design a URL shortener that survives a billion redirects a day using Cloud CDN, cache keys, and smart redirect codes.
- MCB EditorialNext.js 16 & React 19
Our Flash Sale Page Served Stale Prices to Everyone, Including the CEO
Learn to adopt Cache Components in Next.js 16 so pages stay fast without ever leaking stale or wrongly-shared data.
MCB EditorialAgentic AI - LangChain, LangGraph, LangSmith, LangFlow and n8nThe Day a Refund Bot Nearly Approved a ₹48,000 Payout Alone
Build a LangGraph refund agent with checkpoints, n8n connectors, human approval guardrails, and LangSmith online evals.
- MCB EditorialAWS & DevOps
We Cut a ₹41 Lakh AWS Bill to ₹16 Lakh Without Losing a Single Feature
Learn how Cost Optimization Hub, Graviton migration, Savings Plans, and S3 lifecycle tiers cut cloud spend without downtime.
- MCB EditorialSystem Design
The 40GB Wedding Video That Crashed Our Homegrown Transcoding Fleet
Learn to design an upload-to-transcode pipeline with managed services so your renditions never silently fail again.
- MCB EditorialNext.js 16 & React 19
The Lab Said 0.9s, Real Phones Said 4.8s: Fixing Core Web Vitals in Next.js 16
Learn to measure, report, and diagnose LCP, CLS, and INP regressions using Next.js 16's useReportWebVitals and instrumentation-client.
- MCB EditorialKubernetes & Docker
We Ran docker compose bridge convert Two Days Before Launch. Here's What It Didn't Tell Us
Learn exactly what docker compose bridge convert changes under the hood so you can review and fix a Compose app before it ever reaches a real cluster.
MCB EditorialClaude CodeWhy Our Claude Code Agent Almost Ran rm -rf in CI (And How We Locked It Down)
Learn to wire CLAUDE.md, slash commands, hooks, subagents and MCP permissions so Claude Code stays safe in unattended runs.
- MCB EditorialAI Trends
Reasoning Models, MCP, and the Plumbing Behind AI Agents in 2026
Walk through the six shifts reshaping AI engineering this year, from reasoning models to a complete, runnable Model Context Protocol example.
- MCB EditorialEmerging Tech
Agents API, Agents SDK, or Responses API: The One Decision That Breaks Production
Learn exactly when OpenAI should own your agent and when you should, with a runnable Codex MCP example you can run tonight.
- MCB EditorialAgent Frameworks
Five Agent Frameworks, Two We Can Actually Verify: A Documentation-First Comparison
Learn LangGraph and CrewAI's documented APIs hands-on, and know exactly what remains unverified about AutoGen, the OpenAI Agents SDK, and LlamaIndex.