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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.

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Claude Code v2.1.221

Teammate respawn records transcript restoration and first-paint marks

Under the hood
Useful2 Signal0
Sessions

Resumed teammate sessions now replay first-paint marks to clients that attach, so reattaching looks right.

What

The dispatch record now states explicitly whether a launch restores a transcript, and attaching clients get replayed interactivity marks.

Details
  • The launch payload gained an optional restoresTranscript boolean for both prompt and resume modes, persisted in the session schema.
  • Workers derive bootedViaResume from that flag instead of sniffing the argv for --resume.
  • A firedInteractiveMarks array is persisted and replayed to attaching clients: entries of kind content_paint or prompt_idle carrying msgsLoaded, msgsInJsonl and msgsRenderedAtFirstPaint, capped at two.
  • Attach responses now carry an imarkNonce and a booting flag.
Evidence

msgsRenderedAtFirstPaint

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

See this entry in the whole of v2.1.221 →