Follow Discord
Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Stale-memory warnings injected mid-conversation

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

Nothing to try yet In Development
JSON All of v2.1.251
Nothing to try yetTier: how much it should matter to you
2Useful: my rating, 1 to 5
5Signal: worth watching, 1 to 5
MemoryArea: what it touches
In DevelopmentKind: in v2.1.251,
What probably matters to youSection of the release

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 →

Feedback