Week 21 · May 18–22, 2026 changedwhats-new/2026-w21
Nearest release: v2.1.285, published under an hour after upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Upstream edited this page at 29 Sep 2026 16:35 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 22 Oct 2026 18:07 UTC.
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33> Use auto mode on the Pro plan and with Sonnet 4.6, see which skills, subagents, and MCP servers drive your plan limits in /usage, and review diffs with the new /code-review command.
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5Releases [v2.1.143 → v2.1.149](/docs/en/changelog#2-1-143)
5Releases [v2.1.143 → v2.1.149](/docs/en/changelog.md#2-1-143)
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88Auto mode on the Pro plan
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1919The command prints `Successfully updated` with the new version number, or `Claude Code is up to date` if no update is needed. Once auto mode is active, the prompt footer shows `auto mode on`.
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21[Auto mode requirements](/docs/en/permission-modes#eliminate-prompts-with-auto-mode)
21[Auto mode requirements](/docs/en/permission-modes.md#eliminate-prompts-with-auto-mode)
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2323Other wins
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2525[`/usage`](/docs/en/costs#track-your-costs) now shows a per-category breakdown of what's driving your plan limits, attributing recent usage to skills, subagents, plugins, and individual MCP servers"Extra usage" is renamed to "usage credits" across the CLI, and `/extra-usage` is now `/usage-credits`. The old name still works. The command requires signing in with your claude.ai subscription through `/login` and isn't available with API key authentication.New [`/code-review`](/docs/en/code-review) command reports correctness bugs at a chosen effort level such as `/code-review high`, and `--comment` posts findings as inline GitHub PR comments. `/simplify` remains as a separate cleanup-only review\.Background sessions now appear in `/resume` alongside interactive ones, marked with `bg`, and sessions pinned with `Ctrl+T` in `claude agents` stay alive when idle`claude agents --json` lists live sessions as JSON for scripting, such as status bars and session pickersThe PowerShell tool is now enabled by default on Windows for Amazon Bedrock, Google Cloud's Agent Platform, and Microsoft Foundry users; opt out with `CLAUDE_CODE_USE_POWERSHELL_TOOL=0``claude plugin disable` now refuses when another enabled plugin depends on the target, and `claude plugin enable` force-enables transitive dependenciesThe `/plugin` marketplace browse pane shows projected context cost, and the Discover and Browse screens list a plugin's commands, agents, skills, hooks, and MCP/LSP servers before installationNew `worktree.bgIsolation: "none"` setting lets background sessions edit the working copy directly without `EnterWorktree`, for repos where worktrees are impracticalMarkdown output renders GFM task list checkboxes, and the `/diff` detail view scrolls with the keyboardStatus line JSON input now includes GitHub repo and PR information when detectedEnterprise: the `allowAllClaudeAiMcps` managed setting loads claude.ai cloud MCP connectors alongside `managed-mcp.json`
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27[Full changelog for v2.1.143–v2.1.149 →](/docs/en/changelog#2-1-143)
27[Full changelog for v2.1.143–v2.1.149 →](/docs/en/changelog.md#2-1-143)
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