This week in Claude Code, Codex and Gemini CLI (week of November 1, 2026)
Originally published at https://aicoding-guide.com . This week has a deadline in it . Fast mode for Opus 4.8 is deprecated as of 2026-10-30 and removed on 2026-11-30 . The CHANGELOG is specific that after removal, fast mode requests on Opus 4.8 return an error and do not fall back to standard Opus 4.8. On the feature side, idle compaction spread to VS Code and the desktop app — two weeks after it…
In this week's update, the fast mode for Opus 4.8 is being deprecated and will be removed on November 30, 2026. After its removal, any remaining requests for fast mode on Opus 4.8 will return an error and will not fall back to the standard Opus 4.8. As an alternative, it is recommended to migrate to Opus 5.5 to maintain the speedup.
Additionally, idle compaction has been added to VS Code and the desktop app, which summarizes conversations left idle for over 200K tokens and uses the summary for the next message if the prompt cache has expired. The deprecated feature, claude_code.safety_event, is no longer being sent a week after it was added. In terms of security, sessions failing due to invalid effort levels are now fixed by Claude Code lowering the effort, retrying, and informing which level it uses.
Furthermore, a new configuration option, permissions.blockWritesOutsideWorkingDirectories, has been added to confine writes to the working directories in every permission mode.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
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