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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 v2.1.219

Workshop and sidecar slug state now propagates out of forked agent contexts

Under the hood
Useful2 Signal0
Elsewhere

Subagents can now pass workshop and sidecar tracking state back to your main session.

What

The allowlist of AppState keys a forked or subagent context may write back to the parent session grew from one key to three.

Details
  • ASYNC_SHARED_APP_STATE_KEYS previously held only frameUrls
  • it now also includes workshopVerifiedSlugs and sidecarHistorySlugs
Evidence

ASYNC_SHARED_APP_STATE_KEYS

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

See this entry in the whole of v2.1.219 →