AI News — March 18, 2026

Polly — LangSmith's AI debugging assistant — is now generally available across the platform. Built to navigate 300-step traces and thousands of lines of prompts, Polly reads agent execution traces and explains what went wrong and why. Directly addresses one of the biggest pain points in production agent debugging.

Today's stories:

• Polly Is Generally Available in LangSmith (LangChain Blog) — Polly — LangSmith's AI debugging assistant — is now generally available across the platform. Built to navigate 300-step traces and thousands of lines of prompts, Polly reads agent execution traces and explains what went wrong and why. Directly addresses one of the biggest pain points in production agent debugging.
• Introducing the new full-stack vibe coding experience in Google (Google AI Blog) — Google launched a full-stack vibe coding experience integrating Gemini directly into their developer tools — letting developers describe what they want in natural language and get complete, runnable full-stack apps generated end-to-end. Positions Google's tooling as a direct competitor to Cursor and GitHub Copilot for AI-first coding workflows.