Agents & Agentic AI — September 22, 2026

Findings

1. [1] 2026-09-22 v2.1.280

   What's changed Added Claude Opus 5.5 (claude-opus-5-5), now the default Opus model — 1M context, $4/$20 per Mtok with $0.20/Mtok cache reads Added mouse support to more lists in fullscreen mode: the wheel scrolls the /skills list, and a skill's state options… grep with no matches) as failures Fixed background sessions (claude –bg) being unable to run git, hooks, plugins and other helper programs when an environment variable handed to the session contained a NUL character Fixed Ctrl+C needing three or four… shell-mode prompt stashed with Ctrl+S coming back as a plain prompt when restored, and / listing file paths right after stashing one Fixed claude agents showing a blank, unresponsive screen instead of an error when the temp directory is full,… (extension status, the install, reconnect and permissions pages, the enabled-by-default setting), opened from the panel menu or by typing /chrome [VSCode] Added Export conversation, with a typed /export, to copy or save the conversation as plain text [VSCode] Added each…

2. [2] 2026-09-22 v2.47.0 (2026-09-21)

   What's Changed ⚠️ Compatibility Notes Name a None output route None rather than NoneType by @DouweM in #8590 Raise when UserPromptPart.content is not a str or a sequence, instead of silently sending a dict's keys by @DouweM in #8595 🚀 Features Ask three more field types TypeSafeModel can already answer by @DouweM in #8544 🐛 Bug Fixes Refuse a tuple…

Sources

1. [1] v2.1.280
2. [2] v2.47.0 (2026-09-21)