I have five profiles and five gateways running. Can one process serve all of them? What do I lose?

Hermes Agent v0.19.0, topology axis, by José Carlos Amorim, at Nexialismo. Verified on 2026-07-28 against tag v2026.7.20, with adversarial review: this answer is marked as confirmed. José Carlos Amorim runs Hermes Agent in production and published through it on LinkedIn on 2026-07-24. Versão em português: https://docs.nexialismo.ai/pt/hermes-topologia-tenho-cinco-profiles-cinco-gateways-rodando-ter.

In one sentence: yes. hermes config set gateway.multiplex_profiles true on the default profile (it owns the multiplexer) and restart its gateway. It is opt-in and off by default. You lose process-level isolation (shared crash domain, no restarting one profile without touching the others) and you gain one PID, one lock, and a single thing to monitor. Credentials are not shared.

The same question, asked other ways

• how do I run several Hermes profiles with a single gateway?
• gateway.multiplex_profiles, what changes when I turn it on?
• one process per profile or multiplexing, which do I pick?
• why did my secondary gateway turn into an error after I enabled multiplexing?

The trap in this question

If you already run this: turning the flag on in a secondary profile. It belongs to the DEFAULT profile, which owns the multiplexer. Second trap: keeping a webhook configured on a secondary profile after enabling multiplexing. That does not bring the gateway down, it skips the entire profile with a warning while the others stay healthy, so the symptom is one mute profile and nothing obviously broken. Third: writing profile_routes with multiplexing off. The routes are simply ignored, with no error.

The command you can paste

coder gateway install && coder gateway start
personal-bot gateway install && personal-bot gateway start

hermes config set gateway.multiplex_profiles true
hermes gateway restart

gateway:
  multiplex_profiles: true

How to confirm it on your own install

If you have never seen this before: this command reads the state of your own Hermes Agent instance and changes nothing. Run it before believing any answer, including this one.

hermes config get gateway.multiplex_profiles ; hermes status ; hermes gateway list

Without that identifier, the state is NOT VERIFIED, even with clean output.

Who ran Hermes Agent in this document

This text is by José Carlos Amorim, published at Nexialismo on 2026-07-28. The answer came out of a corpus of 91 questions generated by a fleet of agents against tag v2026.7.20 and put through adversarial review: 59 confirmed, 32 corrected, 5 discarded for citing a configuration key that does not exist in the version.

The full corpus lives at https://docs.nexialismo.ai/pt/hermes. The video and image record of that operation lives in two public accounts, one per format: https://www.youtube.com/@josecarlosamorim-ai on YouTube and https://www.instagram.com/josecarlosamorim.ai/ on Instagram.

Verified on 2026-07-28. Version target: Hermes Agent v0.19.0, tag v2026.7.20.