Source Intelligence

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.

All of v2.1.236 Home All releases olderv2.1.235 v2.1.237newer
Claude Code v2.1.236

Live artifact watches can reuse a subscription instead of re-subscribing

Not switched on
Useful1 Signal3
Artifacts

Re-armed artifact watches could reuse an existing connection instead of starting over, but the flag is off.

Subscription reuse and renewal for artifact watches sits behind tengu_slate_lantern_ember, which falls back to false.

Feature flag
tengu_slate_lantern_ember Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.236: on

Read once, for one account on one subscription tier, against v2.1.236. It isn't a statement about your account. What a flag value here can and cannot tell you

What

When a live artifact watch is automatically re-armed, it can reuse a cached subscription token or renew it rather than starting a fresh subscription each time. This sits behind the gate tengu_slate_lantern_ember, which falls back to false in this build.

Details
  • The cached token's lifetime is clamped between 30 and 60 minutes.
  • Reconnect backoff switches to a spread window when this mode is active.
  • Reuse and renewal are reported in the subscribe telemetry as token_reused, lease_remaining_min and token_renewed; failed renewals appear as renew_miss_*.
Evidence

restored_consent_not_editor

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

See this entry in the whole of v2.1.236 →