Under the hood
Useful1 Signal2
PDF page images and several caches now read through a shared storage layer instead of raw files.
What's wrong with this entry?
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What
Extracted PDF page images are now listed and read back through the shared storage abstraction rather than direct filesystem calls, with a guard that fails if the extraction directory sits outside the session's tool-results store. Model-capability caches and the closed-issues cache gained the same storage-backed paths; all of them fall back to the previous filesystem path when no storage handle is supplied.
Evidence
PDF extraction directory is outside the session tool-results store
Strings lifted out of the shipped bundle, so the claim above can be checked against them.