A new memory system gives Claude a persistent, file-based scratchpad stored in a configurable memory directory. Information saved there carries over to future sessions.
- Enabled by the
tengu_stone_shellfeature flag. - Claude receives detailed guidance on what makes a good memory: applicable (prevents repeated mistakes), durable (recurring workflows), and legible (self-contained, full sentences).
- Claude is instructed to write memory before the end of any turn where the user corrects it or it discovers something new about the environment.
- Memory files use markdown with frontmatter (
name,descriptionkeys). - This is separate from the existing
#/memoryshortcut system; it's a lower-level persistent layer.
"You have a persistent, file-based memory stored at {memory_dir}." (search for "TVh" or "tengu_stone_shell")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
tengu_stone_shell Off in both readingsThe 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 v2.1.212: off
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 v2.1.212. It isn't a statement about your account. What a flag value here can and cannot tell you
A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
New in this build: tengu_stone_shell