Shell secret persistence — runtime calls these to save/load the per-shell secret used for deterministic keypair derivation. The secret is a 32-byte random value generated once on first use.
Get the stored shell secret, or null if not yet generated.
Store the shell secret.
Shell secret persistence — runtime calls these to save/load the per-shell secret used for deterministic keypair derivation. The secret is a 32-byte random value generated once on first use.