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 v2.1.251 Home All releases olderv2.1.250
Claude Code v2.1.251

Memory context fetched in the background before a turn starts

Not switched on
Useful2 Signal4
Memory

Memory context can be fetched in the background as a turn begins, behind an off flag.

Background memory prefetch sits behind the same off-by-default memory flag.

What

New code starts fetching memory context for the current host as soon as a query begins and joins the result later, recording how long the fetch took and how much of it overlapped with the start of the turn. It sits behind the same off-by-default memory flag as the stale-read warnings.

Details
  • Timing is reported as a duration in milliseconds plus an overlap measure.
Evidence

memory_context_fetch_ms

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

See this entry in the whole of v2.1.251 →