SimplexAdapter.__init__ (auto_accept, group_allowed), the registry gates
check_requirements/validate_config/is_connected, _env_enablement and
_standalone_send all read SIMPLEX_* via raw os.getenv. Under
gateway.multiplex_profiles those paths run inside a secondary profile's
scope where os.environ holds the DEFAULT profile's YAML-to-env bridge
output -- so a secondary profile that never configured SimpleX was
auto-enabled on the default's daemon URL and inherited its group
allowlist / auto-accept setting.
Route every read through the module-local `_get_scoped_secret` wrapper
(get_secret; UnscopedSecretError -> os.getenv for the default profile,
which constructs unscoped) -- the same helper the IRC/ntfy/Photon/
Mattermost siblings use. Unlike the extra-only `_scoped_platform_setting`
shape proposed in #100241, this honors BOTH the secondary profile's own
.env (the scope) and its config.yaml extra, and needs no config.yaml
re-read in check_requirements.
Rewrite of #100241.
Co-authored-by: nftpoetrist <264138787+nftpoetrist@users.noreply.github.com>
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