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.
Tool uses are no longer counted twice in recent activity
You'll notice
Useful2Signal1
Sessions
Re-delivered messages no longer inflate the recent tool activity count.
What's wrong with this entry?
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What
A re-delivered assistant message used to inflate the record of recent tool activity. Already-counted tool uses are now tracked by id and skipped, and each activity record is stamped with the time it was recorded.
Details
Records carry recordedAtMs; duplicate suppression uses a seenToolUseIds set.
Evidence
recordedAtMs: Date.now()
Strings lifted out of the shipped bundle, so the claim above can be checked against them.