Under the hood
Useful1 Signal2
Background job files, daemon markers and insight caches can live in the storage layer instead of on disk.
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What
Background job teardown deletes the job's storage scope rather than removing its directory, daemon host-managed markers and pty pid files are written and deleted as storage keys, and the usage-insights caches are read in batches with a per-key fallback. Each keeps the old filesystem path when the newer storage backend is not present.
Evidence
host-managed
Strings lifted out of the shipped bundle, so the claim above can be checked against them.