This is the best site on the internet to learn harness engineering.
Free. Completely.
Most AI engineers have never heard the term.
https://t.co/bwDbTTYsjM
Bookmark this site.
Then read this setup ↓
Anthropic's in trouble, again!
They spent years building what's now fully open-source.
What made Claude feel different from a normal app is that the agent could act inside the interface instead of only talking in a chat box.
For instance, Claude Artifacts let an agent render real UI, charts, dashboards, and interactive components that assemble live inside the response.
Every major AI product tried to replicate it.
But the problem was that unlike reasoning, planning, tool-calling, etc., none of it shipped natively with LangGraph, CrewAI, or Google ADK.
So teams started building an owned version that required engineering the entire interface layer from scratch.
Most teams, however, just settled for shipping the agent as a backend API in a chat box since rendering the UI is only one piece of it.
To actually make it work, the interface layer also needed real-time streaming, state kept in sync between agent and UI, conversations that persist across sessions, and reconnection when a user refreshes mid-run.
@CopilotKit is now the only open-source framework that actually lets you build your own full-stack Claude-like apps.
It decouples the agent from the interface, talking over AG-UI (an open protocol for agent-to-user communication).
Being a standard protocol, the frontend never needs to know whether it is talking to a LangGraph or a CrewAI agent. You can change the backend anytime and the UI will never notice.
In practice, CopilotKit's interface layer gives several pre-implemented React building blocks that wire the agent directly into the app, like:
- generative UI, so the agent renders real components instead of text
- chat windows, sidebars, and popups, or a fully headless setup
- shared state, so the agent and app stay in sync
- human-in-the-loop approvals, where the agent waits before acting
- persistent threads that store the whole session, including the agent-user interactions and generated UI, not just text
And because that full history is captured, those interactions can feed a self-learning layer that also improves the agent from real usage over time.
The interface layer that Anthropic spent years engineering in-house is now literally available to any developer/team.
CopilotKit is open-source with 30k+ GitHub stars, and AG-UI, the protocol underneath, is already supported across every major agent framework: LangGraph, CrewAI, Mastra, Google ADK, and more.
CopilotKit GitHub repo → https://t.co/wkQ1taF0rM
(don't forget to star it ⭐ )
If you want to go deeper, I found a detailed breakdown by Shubham Saboo recently on the three Generative UI patterns, with implementation.
Read it below.
RAG vs. CAG, clearly explained!
RAG is great, but it has a major problem:
Every query hits the vector DB. Even for static information that hasn't changed in months.
This is expensive, slow, and unnecessary.
Cache-Augmented Generation (CAG) addresses this issue by enabling the model to "remember" static information directly in its key-value (KV) memory.
In fact, you can combine RAG and CAG for the best of both worlds.
Here's how it works:
RAG + CAG splits your knowledge into two layers:
↳ Static data (policies, documentation) gets cached once in the model's KV memory
↳ Dynamic data (recent updates, live documents) gets fetched via retrieval
This gives faster inference, lower costs, and less redundancy.
The trick is being selective about what you cache.
Only cache static, high-value knowledge that rarely changes. If you cache everything, you'll hit context limits. Separating "cold" (cacheable) and "hot" (retrievable) data keeps this system reliable.
You can start today. OpenAI and Anthropic already support prompt caching in their APIs.
I have shared my recent article on prompt caching below if you want to dive deeper.
Have you tried CAG in production yet?
Below, I have quoted an article that I wrote on prompt cashing and how Claude Code achieves a 92% cache hit-rate. Give it a read.
ANTHROPIC JUST SOLVED THE PROBLEM THAT HAS BEEN HOLDING BACK EVERY CLAUDE CODE USER WHO IS NOT A SENIOR ENGINEER.
One free plugin.
It scans your project.
It configures everything.
Done.
Here is the problem most people do not talk about with Claude Code.
The tool is extraordinarily powerful when configured correctly.
The configuration is extraordinarily painful to get right.
Which MCP servers does your project actually need.
Which hooks should fire for your specific workflow.
Which subagents are relevant for your tech stack.
Which slash commands would save you the most time.
Answering those four questions correctly requires reading your entire project structure, understanding your dependencies, analyzing your code patterns, and cross-referencing all of that with what each available server and subagent actually does.
Most developers skip this entirely.
They install Claude Code with default settings.
They get default results.
They conclude Claude Code is good but not transformative.
They are wrong about why.
The official Anthropic plugin removes the manual configuration layer entirely.
Point it at your project.
It reads your structure. Your dependencies. Your code patterns.
It installs the right MCP servers for your specific stack.
It configures the right hooks for your specific workflow.
It sets up the right subagents for your specific use cases.
It creates the right slash commands for your specific repeating tasks.
One scan. Perfect configuration. Free.
The developer who has been running Claude Code at 40% capacity because setup was too painful just had every configuration problem solved automatically.
The developer starting a new project today skips the entire painful configuration phase entirely.
100% free.
Official Anthropic release.
Install it before you open your next project.
Bookmark this.
Follow @cyrilXBT for every Claude Code release that changes what one person can build.
llama.cpp adds MTP for the Qwen3.6 family
This is a significant milestone for the local AI ecosystem. The performance jump with these changes is massive and elevates local inference on commodity hardware further.
Special thanks to Aman Gupta for leading this development!
https://t.co/vjaMwEpIaR
the engineer who built Claude Code just dropped a 28-minute video on how to write prompts that actually work
I've seen $300 courses that don't cover what he shows in the first 10 minutes
CLAUDE.md files, memory shortcuts, parallel sessions, prompting patterns
all in one video and completely free
works whether you're a developer, a beginner, or someone who's been using Claude for months
based on this, I put together 18 things you can copy and use in Claude today
full guide in the article below
🚨 Google acaba de liberar sus skills oficiales para agentes de IA.
Ha publicado 13 skills compatibles con Claude Code, Cursor, Copilot y otros agentes.
Permiten que los agentes puedan ejecutar tareas avanzadas y automatizar flujos de trabajo complejos.
Es gratis y open-source 👇
A NVIDIA ESTÁ LITERALMENTE OFERECENDO INFERÊNCIA DE IA GRATUITAMENTE
Eu configurei em 5 minutos e não conseguia acreditar que era grátis.
DeepSeek, MiniMax, Kimi, GLM, Llama - tudo na Nuvem DGX da NVIDIA via API limpa e compatível com OpenAI.
Configuração em 5 min:
→ https://t.co/IQLvQgncp5 → obtenha a chave da API
→ base_url = https://t.co/9UW6eZAJbz
→ insira em qualquer SDK OpenAI
Temos usado. Sim, fica mais lento sob carga pesada. Sim, o plano gratuito tem limitações.
Mas para desenvolvedores solo, programadores independentes e estudantes de engenharia de IA?
Este é o melhor ambiente de testes gratuito que existe atualmente.
Pare de pagar US$ 20/mês para experimentar. Use isso primeiro.
Our official Agent Skills repository on @github is here!
Skills are a simple, open format for giving agents new capabilities and expertise. Think of a skill as compact, agent-first documentation for a specific tech or task.
Learn more → https://t.co/7w887vz3lE #GoogleCloudNext
Goodbye Claude Code subscription fees.
Someone just built a proxy that runs Claude Code completely free... and it's wild.
You literally plug in a free NVIDIA API key and point Claude Code at localhost.
That's it.
It handles everything:
- Converts Anthropic API calls to NVIDIA NIM format
- Unlocks 40 requests/min for free
- Supports Kimi K2, GLM 4.7, MiniMax M2, Devstral and more
- Streams thinking tokens and tool calls live
- Even includes a Telegram bot so you can run Claude Code from your phone
No API bill. No rate limit panic. No vendor lock-in.
Honestly, this goes beyond router tools like OpenRouter.
It doesn't just swap the model... it turns Claude Code into a free agent you can control remotely.
The project is open-source on GitHub.
It's called free-claude-code.
Someone removed the vector database from RAG and got better results. Much better.
Here's what traditional RAG actually does under the hood:
it chunks your document into pieces, embeds those pieces into vectors, and retrieves based on semantic similarity. The assumption is that similar text = relevant text.
That assumption breaks completely for professional documents.
When you ask "what were the debt trends in Q3?", vector search returns chunks that look similar to that question. But the actual answer might be buried in an appendix, referenced across three sections, in a part of the document that shares zero semantic overlap with your query. Traditional RAG never finds it.
Similarity ≠ relevance. PageIndex was built around that insight.
Inspired by AlphaGo, it builds a hierarchical tree index from your document - an intelligent table of contents optimized for LLM reasoning. Then it navigates that tree the way a human expert would. Not pattern matching. Reasoning. "Debt trends are usually in the financial summary or Appendix G, let's look there."
What disappears:
→ No vector DB to build or maintain
→ No arbitrary chunking that breaks cross-section context
→ No opaque retrieval you can't explain or trace
What you get:
→ Retrieval traceable to exact page and section references
→ Multi-step reasoning across document structure
→ Works on financial reports, legal filings, regulatory documents
The benchmark:
→ PageIndex: 98.7% on FinanceBench
→ Perplexity: 45%
→ GPT-4o: 31%
Open source.