Week 17 · April 20–24, 2026 changedwhats-new/2026-w17
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 29 Sep 2026 16:37 UTC.
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9898 <div><a href="/docs/en/sub-agents#fork-the-current-conversation">Forked subagents</a> can be enabled on external builds with <code>CLAUDE\_CODE\_FORK\_SUBAGENT=1</code>: a fork inherits your full conversation context instead of starting fresh</div>
9999 <div>Default <a href="/docs/en/model-config#adjust-effort-level">effort level</a> for Pro and Max subscribers on Opus 4.6 and Sonnet 4.6 is now <code>high</code> (was <code>medium</code>)</div>
100100 <div>Native macOS and Linux builds replace the <code>Glob</code> and <code>Grep</code> tools with embedded <code>bfs</code> and <code>ugrep</code> available through Bash, for faster searches without a separate tool round-trip</div>
101 <div><code>--from-pr</code> now accepts GitLab merge request, Bitbucket pull request, and GitHub Enterprise PR URLs in addition to github.com</div>
101 <div>`--from-pr` now accepts GitLab merge request, Bitbucket pull request, and GitHub Enterprise PR URLs in addition to github.com</div>
102102 <div>Auto mode: include <code>"\$defaults"</code> in <a href="/docs/en/auto-mode-config"><code>autoMode.allow</code>, <code>soft\_deny</code>, or <code>environment</code></a> to add custom rules alongside the built-in list instead of replacing it</div>
103103 <div>New <a href="/docs/en/plugins/dependencies#tag-plugin-releases-for-version-resolution"><code>claude plugin tag</code></a> command creates release git tags for plugins with version validation</div>
104104 <div>Opus 4.7 sessions now compute against the model's native 1M context window, fixing inflated <code>/context</code> percentages and premature autocompaction</div>
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