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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 v2.1.205

More specific session restart messages

When a session or worker restarts, Claude Code now shows a targeted message instead of a generic one:

  • "Agent is updating to the new Claude Code…" — when the restart is due to a software update (ERESPAWNING + "updated"/"upgrad")
  • "Session not responding — restarting it…" — when the worker stalled
  • "Migrating job to attachable PTY…" — for legacy job PTY migration
  • "Session is restarting…" — generic fallback
Evidence

Restart message strings (search for "Agent is updating to the new Claude Code") — Bv_() at line ~718756

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

See this entry in the whole of v2.1.205 →