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Claude Code release 2.1.304

Author
Anthropic
Published
19 October 2026
Added
20 October 2026
Original
https://github.com/anthropics/claude-code/releases/tag/v2.1.304

Summary

Claude Code 2.1.304 adds a guided /auto-mode-setup command, review depth levels for Claude Code Review, and a way for permission mods to insist on a human decision. It also warns Pro and Max users before an expensive resume, changes how skills and hooks behave after compaction, and fixes 43 bugs.

Key points

  • /auto-mode-setup: run it in a project to have Claude read the repo and recent sessions and teach auto mode's classifier about your environment, so fewer safe actions get blocked. It also works on Bedrock, Vertex, Foundry, the Claude apps gateway, and with telemetry off.
  • Code Review levels: in Code Review admin settings, owners choose Quick, Standard (default), or Deep for the organization and can override per repository. A new option reviews every repository in the GitHub organization, including ones added later.
  • Human-only approval in mods: a tool.check answer can set decider: "person", so only the permission dialog or the host's callback can approve the call. With no one to ask (for example claude -p), the call is refused with the mod's reason. A new e.isReadOnly flag tells the mod whether the call is read-only.
  • Managed settings ceilings: settings.read hooks now see each settings layer and can rewrite the merged result, so an organization mod can cap values such as cleanupPeriodDays.
  • /claude-api managed-agents-secure: checks a Managed Agents agent's configuration against Anthropic's security guide without changing it.
  • Skills: the full skill list is resent after compaction, and /reload-skills sends only new or changed skills. One source can register at most 1,024 skill hooks per session.
  • Usage warning: on Pro and Max, resuming a long-idle conversation that would use a large share of the 5-hour limit now asks whether to resume or start fresh.
  • Gateways: tool search is on by default behind a custom ANTHROPIC_BASE_URL, with an automatic retry without it if the gateway returns 400 or 422.
  • Cloud sessions: they no longer wait for a plugin's stdio MCP servers to start unless the server sets alwaysLoad: true.
  • The /fast dialog drops the "research preview" label for Opus 5.5 (see the fast mode docs).

Why it matters

/auto-mode-setup is the quickest way to make auto mode useful in a specific repo, and decider: "person" lets a team's guardrail mod keep a human in the loop for risky actions even when auto mode is on. Review levels let teams trade review cost against depth per repository.