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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.