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

Stale-memory warnings injected mid-conversation

Not switched on
Useful2 Signal5
Memory

Claude could be warned when a memory file it read has since changed, but that's off.

Stale-memory update blocks are built behind an internal flag that is off unless server config enables it.

What

New machinery watches memory read and write tool calls and the version stamps on their results. If a memory file the model read earlier has changed since, an update block is injected telling the model its earlier read is stale, with instructions never to quote or paraphrase that block back to you. Gated behind an internal flag that is off unless server config enables it, so nothing in this build turns it on.

Details
  • Tracks tool calls matching the memory read, write, string-replace and append tools.
  • Freshness is decided by comparing the version stamp seen at read time against the current one.
Evidence

This memory_read result is stale

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 →