You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SettingsArea: what it touches
ImprovementsKind: in v2.1.280,
ImprovementsSection of the release
What
A new validation pass checks settings values and flags keys whose configured value doesn't pass validation. It also distinguishes between a setting that "counts as off" versus one that "counts as unset" as a result of the invalid value, and suggests fixing it through /config or deleting the key entirely.
Why
Previously an invalid setting value could silently misbehave with no indication of the cause. Now you get a clear warning and a concrete way to fix it.
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Added sinceA small documentation edit on Glossary touched a line naming /config after this was published.A markdown file of project instructions you write for AI coding agents. If your repository has one and no [CLAUDE.md](#claude-md), Claude reads it as your project instructions without you adding a second file. You can change the **Project …glossarysee the edit
Confirmed sinceAnthropic's documentation has since written up /config, on files.mount_path: /config.jsonmanaged-agents/filessee the edit
How sure we are
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up /config, on files.
Anthropic's release notes agreeFixed Ctrl+C or Ctrl+D pressed twice in most dialogs (/model, /effort, /config, /status, /usage, /plugin, /sandbox, /permissions…
