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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Reference / Environment variables

CLAUDE_AFK_COUNTDOWN_MS

A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.198, including the newest one read.

What it is

How many milliseconds before auto-continue the on-screen countdown appears on an unanswered [AskUserQuestion](/docs/en/tools-reference) dialog. Default 20000 (20 seconds), capped at the auto-continue timeout. Has no effect unless auto-continue is on; see the [askUserQuestionTimeout](/docs/en/settings-reference#askuserquestiontimeout) setting and CLAUDE_AFK_TIMEOUT_MS. Requires Claude Code v2.1.198 or later

Anthropic's own wording. Read off Environment variables, captured 2026-08-28.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.198 – 2.1.243 45 releases in the build int —

A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.

Changelog entries naming it

No changelog entry here has ever named it. That is a statement about what has been written, not about the name: it has been in the build since v2.1.198 without anybody writing a line about it.

Documentation pages

A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.

Names beside it

Every environment variable in the inventory starting claude_afk, up to twelve of them.

CLAUDE_AFK_TIMEOUT_MSHow many milliseconds of idle time before an unanswered [AskUserQuestion](/docs/en/tools-reference) dialog auto-continues without you. Auto-continue is off by default; opt in with the [askUserQuestionTimeout](/docs/en/settings-reference#askuserquestiontimeout) setting. This variable is an override for demos and automated tests: when set, it takes precedence over that setting and turns auto-continue on even when the setting is unset or never. Setting 0 doesn't turn the timeout off; it closes the dialog immediately. In v2.1.198 and v2.1.199, auto-continue was on by default with a 60000 (60 seconds) timeout. Requires Claude Code v2.1.198 or later 2.1.198

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the environment variable does. All environment variables.