A roundup of recent Anthropic posts on Twitter/X covering customizable Claude Code mods, the Opus 5.5 model with usage limit boosts, and the 2026-07-28 MCP spec release that makes the protocol stateless. The thread itself is a collection of tweets, so this is a digest rather than a single argument.

• Claude Code can now be modded through plugins, with examples like Token Weather (context window forecast) and Blast Radius (flags risky shell commands before they run).
• Opus 5.5 is reported as roughly 30% faster and 40% cheaper per task than Opus 5, becoming the default for paid plans, with 5-hour session limits raised 20% and a one-time usage reset available until Oct 22.
• MCP 2026-07-28 makes the protocol stateless, so remote servers can run on serverless or edge infrastructure and scale horizontally, and adds formal extensions like MCP Apps, Tasks, and Enterprise Managed Auth.

The article argues that the Model Context Protocol (MCP) offers a more effective way to connect large language models (LLMs) to services compared to Skills. While Skills can help with knowledge transfer, they create unnecessary complications, especially when they require command line interfaces (CLIs). The author advocates for using MCP to streamline service integration and improve user experience.

• MCP abstracts away implementation details (no local installs, auth is simpler, updates happen seamlessly), while Skills often push that complexity onto the user
• Skills requiring CLI execution break down for LLMs like ChatGPT that can't run command-line tools
• Skills introduce deployment headaches, secret management issues, and context bloat that MCP avoids
• Skills should be reserved for knowledge transfer, while MCP should handle actual service/API execution