Week 37 · September 7–11, 2026 changedwhats-new/2026-w37
Nearest release: v2.1.282, published 7 hours before 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 24 Sep 2026 23:46 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> Test your plugins with claude plugin eval and pop Claude Code Desktop panes out into their own windows.
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5Releases [v2.1.263 → v2.1.269](/docs/en/changelog#2-1-263)
5Releases [v2.1.263 → v2.1.269](/docs/en/changelog.md#2-1-263)
662 features · September 7–11
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88Test plugins with claude plugin eval
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2121When Claude tells you the suite is ready, exit the session that `claude plugin eval init` opened and run `claude plugin eval .` to score every case. The summary table prints in your terminal, and `report.html` under `evals/results/` has the per-run detail.
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23[Test plugins with evals](/docs/en/plugin-evals)
23[Test plugins with evals](/docs/en/plugin-evals.md)
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2525Pop Desktop panes out into their own windows
2626Desktop
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3030<video autoPlay muted loop playsInline src="https://mintcdn.com/claude-code/f9HTZGyMtxIFOUgt/images/whats-new/desktop-pop-out-panes.mp4?fit=max&auto=format&n=f9HTZGyMtxIFOUgt&q=85&s=ff3770dd09bb15ed9cf17a460f3d1e23" />
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32[Arrange your workspace](/docs/en/desktop#arrange-your-workspace)
32[Arrange your workspace](/docs/en/desktop.md#arrange-your-workspace)
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3434Other wins
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36Set [`maxEffortLevel`](/docs/en/settings-reference#maxeffortlevel) at the top level or per model under `modelSettings` to cap the effort level on every provider, including Amazon Bedrock, Google Cloud's Agent Platform, and Microsoft Foundry; any higher level runs at the capPoint `--plugin-dir` at a folder of plugins to [load each immediate subfolder that has a manifest](/docs/en/plugins/create#load-a-directory-or-archive-for-one-session)If WebFetch hasn't finished downloading a page within five minutes, [the fetch fails with a deadline error](/docs/en/tools-reference#webfetch-tool-behavior) instead of hanging; set `CLAUDE_CODE_WEBFETCH_DEADLINE_MS` to change the deadline, or to `0` to remove the limitPass `--json` to `claude plugin install`, `uninstall`, `update`, `enable`, or `disable` to print the result as [one JSON object on the last line of stdout](/docs/en/plugins/cli-reference#plugin-json-result)When the auto mode classifier blocks an action, the reason Claude receives [usually names the rule that matched](/docs/en/auto-mode-config#fix-a-denial-with-an-allow-rule-an-environment-entry-or-a-retry), such as `[Data Exfiltration]`When you type `/` partway through a prompt, you can now pick from [a list of matching commands](/docs/en/interactive-mode#complete-a-command-mid-prompt) instead of a single suggestion. The list opens as you type in fullscreen rendering. A plugin skill also matches on its name without the plugin prefixIn the VS Code extension, click the agent count at the bottom of the prompt box to open the [agent map](/docs/en/vs-code#use-the-prompt-box), where you can open a subagent's read-only transcript or stop itIn the VS Code extension, select **Hooks** or **Permissions** in the command menu's Customize section to [add or remove hooks and permission rules](/docs/en/vs-code#use-the-prompt-box) in your user, project, and local settingsClaude can pick a [browser-tab icon](/docs/en/artifacts#create-an-artifact) to match each artifact it publishesIn Claude Code on the web, take back a queued message in a cloud session before Claude reads it: remove it from the queue, or press `Esc` or `Up`, and the text returns to the message box
36Set [`maxEffortLevel`](/docs/en/settings-reference#maxeffortlevel) at the top level or per model under `modelSettings` to cap the effort level on every provider, including Amazon Bedrock, Google Cloud's Agent Platform, and Microsoft Foundry; any higher level runs at the capPoint `--plugin-dir` at a folder of plugins to [load each immediate subfolder that has a manifest](/docs/en/plugins/create.md#load-a-directory-or-archive-for-one-session)If WebFetch hasn't finished downloading a page within five minutes, [the fetch fails with a deadline error](/docs/en/tools-reference.md#webfetch-tool-behavior) instead of hanging; set `CLAUDE_CODE_WEBFETCH_DEADLINE_MS` to change the deadline, or to `0` to remove the limitPass `--json` to `claude plugin install`, `uninstall`, `update`, `enable`, or `disable` to print the result as [one JSON object on the last line of stdout](/docs/en/plugins/cli-reference.md#plugin-json-result)When the auto mode classifier blocks an action, the reason Claude receives [usually names the rule that matched](/docs/en/auto-mode-config.md#fix-a-denial-with-an-allow-rule-an-environment-entry-or-a-retry), such as `[Data Exfiltration]`When you type `/` partway through a prompt, you can now pick from [a list of matching commands](/docs/en/interactive-mode.md#complete-a-command-mid-prompt) instead of a single suggestion. The list opens as you type in fullscreen rendering. A plugin skill also matches on its name without the plugin prefixIn the VS Code extension, click the agent count at the bottom of the prompt box to open the [agent map](/docs/en/vs-code.md#use-the-prompt-box), where you can open a subagent's read-only transcript or stop itIn the VS Code extension, select **Hooks** or **Permissions** in the command menu's Customize section to [add or remove hooks and permission rules](/docs/en/vs-code.md#use-the-prompt-box) in your user, project, and local settingsClaude can pick a [browser-tab icon](/docs/en/artifacts.md#create-an-artifact) to match each artifact it publishesIn Claude Code on the web, take back a queued message in a cloud session before Claude reads it: remove it from the queue, or press `Esc` or `Up`, and the text returns to the message box
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38[Full changelog for v2.1.263–v2.1.269 →](/docs/en/changelog#2-1-263)
38[Full changelog for v2.1.263–v2.1.269 →](/docs/en/changelog.md#2-1-263)
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