Version bump to 2.1.277

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Names in the bundle2.1.277

Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Added since 23 Sep 2026 A small documentation edit on Glossary touched a line naming 2.1.277 after this was published. A markdown file of project instructions you write for AI coding agents. If your repository has one and no [CLAUDE.md](#claude-md), Claude reads it as your project instructions without you adding a second file. You can change the **Project … glossary see the edit

Confirmed since 21 Sep 2026 Anthropic's documentation has since written up 2.1.277, on Environment variables. | `TASK_MAX_OUTPUT_LENGTH` | Removed in v2.1.277 and now a no-op, together with the `TaskOutput` tool it sized. Previously set the maximum number of characters of a [background task's](/docs/en/tools-reference#background-commands) output t… env-vars see the edit

How sure we are

One source agreesOne thing we can check says the same as this entry.

Anthropic's documentation agreesAnthropic's documentation has since written up 2.1.277, on Environment variables.

See this entry in the whole of v2.1.277 →