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 v2.1.224 Home All releases olderv2.1.223 v2.1.225newer

New memory_write tool for saving documents to a connected memory store

Use it now
Useful5 Signal5
Memory Notable

Claude can now save documents into a connected memory store, with secret scanning blocking risky writes.

Feature flag
tengu_haze_glass 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 v2.1.224: 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 v2.1.224. It isn't a statement about your account. What a flag value here can and cannot tell you

memory_writememory_listmemory_readCLAUDE_MEMORY_STORESCLAUDE_CODE_DISABLE_ORG_MEMORY
What

Memory goes from read-only to read-write. Alongside memory_list and memory_read, Claude can now create or overwrite a whole document in a connected, writable memory store, and is prompted to check each of your replies for corrections and preferences worth keeping. Writes are refused for read-only stores, empty content, content over the byte cap, or anything a secret scan flags. Requires memory stores to be connected via CLAUDE_MEMORY_STORES, the allow_memory_sync permission, and CLAUDE_CODE_DISABLE_ORG_MEMORY unset.

Details
  • Prompt guidance: one topic per file, frontmatter on each document, and a per-store index document kept current.
  • Read-only stores refuse with "The memory store ... is read-only in this session; changes will not persist." Store resolution gained a write flag defaulting to false, which drives that refusal.
  • Secret-detection refusal notes the store "is shared across the organization's connected projects."
  • Written text is sanitised: control characters become U+FFFD, and line separators including U+2028 and U+2029 become plain newlines.
  • The whole feature also sits behind the remote-config flag tengu_haze_glass, whose fallback in this build is off, so the real value comes from server config.
  • In auto mode a write is routed to classifier review ("Saving a shared memory document requires classifier review."); in plan mode it asks.
Evidence

The memory store ${JZo(e)} is read-only in this session; changes will not persist., save a document to a connected project memory store

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.224 →