Tool Search, Skills for React, OpenCode
Claude Code updates tool search, Vercel adds React skills, a deep dive into Claude Code techniques, and OpenCode's API block.
Tool Search now in Claude Code
Using many tools from MCP servers in Claude Code can quickly fill up your context. Claude Code now automatically switches to loading tools via search instead of preloading, if your MCP tool descriptions take up more than 10% context. Search works for all MCPs and providers don't have to update anything. Read the X.com article by Thariq (Anthropic)
Vercel: Skills for React Best Practices
Agent Skills are markdown files that give hints or instructions to AI for certain tasks. Vercel has introduced a collection of skills for improving the performance of React applications, e.g., by removing async waterfalls. Read more at Introducing: React Best Practices or install them1:
npx add-skill vercel-labs/agent-skillsGuide to Claude Code
If you have some experience in either Claude Code or other coding agents but want learn more in-depth techniques, I can recommend the following. @affaanmustafa has written the excellent Shorthand Guide to Everything Claude Code, covering concepts like skills, hooks, subagents, etc. His key takeaways are:
Don't overcomplicate - treat configuration like fine-tuning, not architecture
Context window is precious - disable unused MCPs and plugins
Parallel execution - fork conversations, use git worktrees
Automate the repetitive - hooks for formatting, linting, reminders
Scope your subagents - limited tools = focused execution
— @affaanmustafa
Anthropic blocks OpenCode from accessing the private API
OpenCode is a command-line UI for Vibecoding. They have been using the private API provided by Claude Code, which is metered differently than the official Claude API (you can get 5x the usage for the same price).
Now, they are blocked from using it. Read more opinions in the Hacker News thread.
More Resources
How to write a good spec for AI agents
A very comprehensive tutorial, on writing specifications for agents. I have found plans/specs to dramatically improve performance of both Opus 4.5 and GPT 5.2
Annotating for agents
An interesting exploration on giving agents more context, for improving motion and animations.
The add-skill CLI tool makes it possible to easily install Agent Skills into different coding agents (Claude Code, OpenCode, Cursor, Copilot, etc.) ↩