In Theseus, Pithos now opens only with the vault unlocked: it asks
Theseus for the unlock (api.vault.requestUnlock), and Theseus shows its
own PIN prompt, falling back to the master password after three wrong
tries. Pithos never sees either. When the vault locks (Settings > Lock
now) Pithos locks within a few seconds; the add-on watches from the main
process because a hidden panel's timers run about once a minute.
The guide's phrase step gains "Use my Theseus vault" (the default when a
vault exists): the add-on derives the 12-word phrase from the vault
(purpose path pithos/sia-recovery/v1, first 16 bytes as BIP-39 entropy)
and hands it straight to s3d, so there is nothing to write down and the
vault backup restores storage access. The path is now fixed; changing it
would cut users off from their data.
Needs the vault-derive capability. On a Theseus without requestUnlock it
runs ungated, as before.