Under the hood
Useful2 Signal4
Claude Code now tracks how each memory file reached the session and whether it was used.
What's wrong with this entry?
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What
New bookkeeping records how each memory file arrived (in the prompt body, surfaced, merely listed, or not at all) and whether it was later read, written, or both, then matches a memory the model names against that set. It exists to judge whether a cited memory was actually available; nothing new is shown to you.
Evidence
read_written
Strings lifted out of the shipped bundle, so the claim above can be checked against them.