You can now use fast mode on Google Vertex AI for models that support it there. On Vertex, fast mode only works when the model's region is global, us or eu. If the region does not fit, a message tells you which setting to change. A saved fastMode setting is ignored on Vertex, so you turn it on with /fast each session. Outside the Anthropic API, fast mode messages now use wording that does not assume Anthropic or Opus. Setting CLAUDE_CODE_DISABLE_BG_EXIT_HANDOFF or CLAUDE_DISABLE_ADOPT stops Claude Code from handing over background work when you exit.
Turning fast mode on now saves your setting against the right model. Claude Code first looks up the model that fast mode will run on. It then uses that model when it writes the setting.
Written by our agent from the shipped bundle, not by Anthropic.
Fast mode can now run on Vertex AI for models that support it, only for the current session, in regions global, us or eu, with new wording and retry handling
Sessions & agentsBackground exit handoff stays on unless CLAUDE_CODE_DISABLE_BG_EXIT_HANDOFF or CLAUDE_DISABLE_ADOPT is set
Want the reasoning? Read walks the 2 entries that probably matter to you, each one opening to what changed and why.
Read this release → Every row →Anything you can use today, anything that visibly changes, and anything worth poking at. One line each, open for detail.
Fast mode can now run on Vertex AI for models that support it, only for the current session, in regions global, us or eu, with new wording and retry handling
Unclear It is not clear whether any model is marked as supporting fast mode on Vertex in this release.
Background exit handoff stays on unless CLAUDE_CODE_DISABLE_BG_EXIT_HANDOFF or CLAUDE_DISABLE_ADOPT is set
What would fix it?
Smaller changes and internals, grouped as the pipeline found them. Nothing is dropped, it is only further down.
1 more of these is in What probably matters to you, above.
Claude's main instructions now tell it not to send your name, project, email or other personal details to outside services unless you ask
Fast mode can pause with the message "Fast mode was refused for this project", then shows "Trying fast mode again" when the pause ends
Turning fast mode on now looks up the model fast mode will run on and uses it when saving the setting
Unclear What this changes for someone turning fast mode on is not clear.
Claude Code now reports version 2.1.322, with a new build time and build identifier, and no change in behaviour
Published verbatim by Anthropic for v2.1.322. Text is unmodified from the upstream changelog. Everything else on this page came out of the bundle instead, which is why the two lists don't match.
Of these 1 bullets, 0 name something an entry on this page also names, 0 name something no entry here does, and 1 name nothing specific enough to line up either way. The pairings are made on names both sides wrote down, a flag or a setting or a slash command, so read one as probably the same thing rather than as a fact, and read the middle number as candidates rather than as a miss count.
No change to the system prompt since v2.1.321.
Claude Code, interactive mode
949 documentation changes were recorded within 24 hours either side of this release, nearest first. The closest 12 are below. They're here because they happened near this release in time. That's not a claim that this release caused the edit, or that the page documents anything in it.
What's wrong with this entry?
