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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 v2.1.239

Ultraplan mode is reported in telemetry and preserved across session state

Under the hood
Useful2 Signal4
Permissions

Ultraplan mode is now recorded in telemetry and survives a session state round trip.

What

Permission-mode telemetry now carries an ultraplan flag, and session state sent into Claude Code is parsed for the same flag, so ultraplan survives a state round trip.

Details
  • A new helper derives the reported permission mode and ultraplan flag from the previous and new pair, with a rule that reports on every latch rather than only on the transition into plan mode.
  • The metadata report includes is_ultraplan_mode when set; the inbound parser accepts it as a boolean.
Evidence

is_ultraplan_mode

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

See this entry in the whole of v2.1.239 →