Aligns runtime behaviour with SECURITY.md 2.6: externally reachable
messaging adapters must fail closed unless access is explicitly
configured. Closes the confirmed multiplex authorization bypass a
secondary profile's open dm/group policy no longer inherits the default
profile's allowlist trust.
- Own-policy adapters (WhatsApp, WeCom, Weixin, QQBot, Yuanbao) default
dm_policy/group_policy to pairing/allowlist instead of open; open now
requires an explicit GATEWAY_ALLOW_ALL_USERS or per-platform allow-all.
- Startup guard (_own_policy_open_startup_violation) refuses to boot when
an enabled adapter is open without the allow-all opt-in; the guard now
runs for every secondary profile in multiplex mode too.
- Profile-aware own-policy authorization: _authorization_adapter /
_adapter_for_source resolve the live adapter via SessionSource.profile,
so _is_user_authorized and the ingress/pairing/busy/queue paths read the
originating profile's adapter policy, not the default profile's.
- Fail-closed intake for Email, Feishu P2P, and Discord (blank-principal
denial, empty-allowlist deny, missing-interaction.user deny).
Salvaged from #44073 (external-surface hardening), split into a focused
gateway-authz PR per maintainer request. Follow-up fix by Hermes Agent:
the Discord slash-auth channel bypass now matches DISCORD_ALLOWED_CHANNELS
by the same name-inclusive keys (id + name + #name + parent) the on_message
scope gate uses, so a name-form channel allowlist authorizes slash
interactions consistently (was id-only, breaking #name matching).
Co-authored-by: Hermes Agent <agent@nousresearch.com>
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