Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Prompt CacheArea: what it touches
Internal ChangesKind: in v2.1.321,
Internal ChangesSection of the release
Unclear It is not clear which tool runs this check or whether its result is ever shown to users.
What
Claude Code has a new check that looks through code for an object with a breakPromptCache property. When it finds one, it marks the result as breaking the prompt cache. The prompt cache is stored, already-processed conversation text that lets later requests to the model run faster and cost less.
Why
The check points out code that would throw that saved work away.
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear which tool runs this check or whether its result is ever shown to users.
