For AI agents: the complete documentation index is available at /tc39-atlas/en/llms.txt, the full documentation bundle is available at /tc39-atlas/en/llms-full.txt, and this page is available as Markdown at /tc39-atlas/en/changes/month.md.
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      Reporting range: after Aug 20, 2026 through Sep 20, 2026 (inclusive), grouped by Asia/Shanghai daily update; data actually checked at Sep 20, 2026, 06:11 (Asia/Shanghai).

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      No proposal changes were recorded in this period.