Under the hood
Useful2 Signal3
Two internal beta features cover promoting a prompt cache mid-conversation.
What's wrong with this entry?
Anonymous. No account, no email.
What
Two internal beta features register alongside the existing ones such as interleaved thinking and server-side fallback, both concerning promoting a prompt cache partway through a conversation. They use internal headers rather than dated public betas.
Details
- The registration helper only freezes a name and header pair; what decides whether the header is actually sent lives elsewhere in the request path.
Evidence
x-cc-internal-mid-conv-cache-promotion
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.
-
v2.1.219
Prompt-caching doc rewrites the minimum-cacheable-prompt table and adds cache-preserving escape hatches
Both mention prompt caching