Make a meshtastic-equipped archy node work like a stock Meshtastic device AND
keep the private archy group, instead of being isolated on a custom primary:
- slot 0 (PRIMARY) = the DEFAULT public channel (empty name + default key) →
interoperates with every off-the-shelf device on LongFast and picks up
default-channel users; our NodeInfo broadcasts ride here like normal.
- slot 1 (SECONDARY) = "archipelago" (deterministic psk) → private archy↔archy.
Previously the driver set "archipelago" as the PRIMARY, isolating archy from the
public mesh. Now ensure_channel writes at most one channel per call (default
primary first, then archipelago secondary), reusing the existing reboot→
reconnect→re-check loop so it converges in ≤2 cycles without reboot-looping;
primary_is_default() accepts the default key in 1-byte or expanded form so a
stock radio is never needlessly rewritten. set_channel generalized to
(index, name, psk, role); want_config parse tracks both slots.
MeshCore needs no change — it never overrides channels (ensure_channel is a
no-op) and already rides MeshCore's default Public channel off the shelf.
cargo check green. NEEDS radio verify on .116/.198 (default-channel RX + archy
group on the secondary). Channel provision cap (3) covers the 2-write migration.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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