Context/cost breakdowns like /context now reuse the exact tool description text actually sent, for accuracy.
The token-counting helpers for MCP tools, built-in tools, skills, and slash commands (dA, formerly TA) now accept a recordedDescription map sourced from the last prompt snapshot, so re-analysis of context usage (e.g. /context) reuses the exact tool description text actually sent to the model instead of recomputing it.
tengu_carved_slate 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 v2.1.252: not a boolean we can read
Read once, for one account on one subscription tier, against v2.1.252. It isn't a statement about your account. What a flag value here can and cannot tell you
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
To keep thinking valid across a long session, treat the conversation as append-only. Add instructions with a [mid-conversation system message](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages) ([turn-s…models/fable-5-1/whats-new-fable-5-1 see the edit
[Compaction](/docs/en/context-window#what-survives-compaction) replaces your message history with a summary. By design, this invalidates the conversation layer, since the next request has a new, shorter history that doesn't share a prefix …prompt-caching see the edit
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.
Anthropic's documentation has since written up /context, on How Claude Code uses prompt caching.