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 v2.1.221 Home All releases olderv2.1.220 v2.1.222newer

Gate for skipping subagent event reads during delta rehydrate

Not switched on
Useful2 Signal2
Sessions Notable not in their notes

A switch can skip one hydration read to speed session resume, but it is off.

A remote gate tengu_ccr_subagent_skip_on_delta can drop subagent event reads during resume, defaulting off.

Feature flag
tengu_ccr_subagent_skip_on_delta 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 v2.1.221: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.221. It isn't a statement about your account. What a flag value here can and cannot tell you

tengu_ccr_subagent_skip_on_delta
What

A new remote-config gate can drop the subagent internal-event read from hydration when delta rehydration is already active.

Details
  • Gate is tengu_ccr_subagent_skip_on_delta, fallback false.
  • Takes effect only when both this gate and delta rehydration are on; the subagent read is then removed from the parallel prefetch.
  • With the fallback, hydration prefetches subagent internal events as before.
Evidence

tengu_ccr_subagent_skip_on_delta

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 →