The firmware has no per-channel scope, so a channel send is now a window
on the companion's session scope: set it, send, restore it, under a
transmit lock every flood-capable send also takes (DMs, adverts, admin
commands, logins, regions/neighbour requests), so nothing interleaves.
Ack waits stay outside the lock. A scope the radio can't take stops the
message (FloodScopeError naming the firmware it needs) rather than sending
it unscoped or under the default; * checks the firmware version, since
before 1.16 the override would quietly fall back to the default scope.
A failed restore is repaired by the next transmission.
Channel scopes are set from the channel page's Send scope picker (known
regions with their carriers, or a typed name) and from the CLI (channels
scope, chat send --scope). The chat's title carries the scope as a status
atom, ^R/Resend sends the newest scoped message again unscoped after an
amber confirm, and the scope each sent message went under is recorded
(messages.scope, schema v17) so the paths dialog can say what it went
under and when no known repeater carries that region. Device config now
teaches the region store the default scope it reads or sets.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 5.5
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