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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.

← All of v2.1.251 Home All releases ←olderv2.1.250

Claude Code v2.1.251 28 Aug 2026

A second reminder slot alongside the batching reminder

Under the hood

Useful1 Signal3

Reminders

A second, separately gated reminder can now ride along with the batching reminder.

What

The reminder-injection logic can now add a second, separately gated reminder to a turn on top of the existing batching reminder, when its own check produces text.

Details

The rendering table gained a matching case, displayed like the other meta reminders such as the total-tokens and silent-turn reminders.

Evidence

type: "secondary_reminder", secondary_reminder

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.251 →