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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.

← All of v2.1.247 Home All releases ←olderv2.1.246 v2.1.248newer→
Claude Code v2.1.247

Lazy loading of subagent history for cloud sessions, off by default

Not switched on
Useful2 Signal3
Cloud Sessions Notable not in their notes

Cloud sessions can defer loading subagent transcripts, but the flag is off unless the server enables it.

Lazy subagent hydration is behind CLAUDE_CODE_CCR_LAZY_SUBAGENT_HYDRATE and a remote flag compiled false.

Feature flag
tengu_ccr_subagent_lazy_hydrate 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 v2.1.247: on

Read once, for one account on one subscription tier, against v2.1.247. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_CCR_LAZY_SUBAGENT_HYDRATE
What

Cloud sessions can defer loading subagent transcripts until they are needed. The switch checks the environment variable CLAUDE_CODE_CCR_LAZY_SUBAGENT_HYDRATE first, then a remote flag whose value compiled into this build is false, so nothing changes unless the server enables it.

Evidence

tengu_ccr_subagent_lazy_hydrate

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

See this entry in the whole of v2.1.247 →