Japanese aggregator @Nag09Tak reports Anthropic shipped Claude Code v2.1.261 on 2026-09-05: org-policy diagnostics via /status and claude doctor, bash/task output caps raised to ~128k chars, new /skill-doctor for unused skills, plus Remote Control, session, and VS Code fixes.
Claude Code Changelog shipped v2.1.263 focused on CLI bug fixes and reliability improvements meant to reduce crashes and stabilize commands. The release notes highlight CLI-side changes; everyday users can upgrade for a steadier terminal experience.
ELI5, built by Claude Code teammate Thariq and published in anthropics/claude-plugins-community, turns /eli5 <topic> into HTML artifacts with big pictures and short sentences—handy for grasping module behavior, design tradeoffs, and incident root causes. Anthropic uses it internally. Install via marketplace add anthropics/claude-plugins-community, then claude plugin install eli5@claude-community.
Developer Yuki Yoshioka (@yoppy0123) notes that from Claude Code v2.1.260, Fable 5.1 keeps the prompt cache valid when effort is changed mid-conversation, cutting repeated prefill cost from effort switches. The post warns Opus 5 is not listed in the notes and likely lacks the same fix yet, so treat models differently after upgrading.
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