Builds

The Agent Stack #013 — Monday Build Bluesky just dropped Attie, and it’s the most interesting social architecture I’ve seen this year. While everyone’s talking about OpenAI killing Sora, builders should focus on what Bluesky’s actually built: an AI agent that customises social feeds using their AT Protocol. This isn’t just another chatbot wrapper. It’s Claude running on top of a decentralised social protocol, letting users build custom algorithms in plain English. “Show me startup news but filter out crypto drama” becomes actual feed logic. ...

The Agent Stack #011 — Monday Build Three markdown files and a script tag. That’s apparently all you need to turn any website into an AI agent interface. The Agent Kernel breakthrough Agent Kernel landed on HN this week with a deceptively simple promise. Three markdown files that make any AI agent stateful. No complex orchestration frameworks. No heavyweight architectures. Here’s how it works: agent-kernel/ ├── context.md # System prompt and agent personality ├── memory.md # Persistent knowledge and learnings └── conversation.md # Current session history The genius is in the simplicity. Each file has a specific job. The agent reads all three before responding, writes updates to memory.md when it learns something new, and appends to conversation.md for session continuity. ...

The Agent Stack #008 — Monday Build NVIDIA just dropped something builders should care about. Their NeMo Retriever introduces “agentic retrieval” - moving beyond simple semantic similarity to actually reason about what information you need. Building Beyond Basic RAG Traditional RAG is broken. You throw documents at a vector database, hope semantic similarity finds the right chunks, and pray your LLM can piece together coherent answers. NVIDIA’s approach flips this. ...

The Agent Stack #006 — Monday Build Chrome 146 just shipped WebMCP support. That means any website can now expose tools for your AI agents to use. The real story isn’t the API—it’s what happens when agents start hitting paid services at scale. Most builders are flying blind on costs until their OpenAI bill arrives. Build: Cost estimation before deployment The Agent-Audit repo tackles this head-on. It’s a linter that estimates costs before your agent runs wild. ...