Image retention: after a done/undone guarded Update and at remove, an app's images older than its running
and previous one are deleted — never an image any container, installed compose or installed/previous record
names (box-wide keep set read at delete time); exact id, never forced or pruned; paused while any update runs;
a one-time sweep of catalog app images at the first start. Install hold: an after_install app is installed
behind the setup gate's door and opens when after_install succeeds or the household says it changed the login.
Tests TestImageRetention_* and TestInstallHold_* with red-proofs; parity fixture for the held card.
MinAgent: 0.131.0 (unchanged).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS
A drive move persisted through the restore's fresh app.yaml write and dropped the pin: the syncer
then copied the catalog verbatim and the next start jumped the app past its ladder (R-700).
persistDriveFlip now changes HDD_PATH and nothing else. The restore's write carries the life
records (conversion copies, desired_state, update history) from the app.yaml it replaces, and a
second conversion no longer overwrites the first kept copy's record (R-697).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS
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