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Synapse homeserver with Element Web client and mautrix-discord bridge. Discord servers are bridged into Matrix so AI agents can search and monitor channel content.

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Access

  • Element Web: https://element.augustin.ai
  • Synapse: https://synapse.augustin.ai
  • Homeserver domain: augustin.ai
  • Admin user: @augustin:augustin.ai
  • Bridge bot: @discordbot:augustin.ai

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Services

All run on i3 via /home/user/apps/matrix/compose.yaml:
ContainerPurpose
synapseMatrix homeserver
matrix-dbPostgreSQL (databases: synapse, mautrix_discord)
elementElement Web client
mautrix-discordDiscord bridge

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Discord Bridge Hierarchy

The bridge maps Discord’s structure into Matrix spaces and rooms: 
Discord (concept)          →  Matrix (concept)
─────────────────              ─────────────────
Top-level container        →  "Discord" space
  Guild (server)           →  Space (child of Discord space)
    Category               →  Sub-space (child of guild space)
      Channel              →  Room (child of category sub-space)
  Direct Messages          →  "Direct Messages" space
    DM conversation        →  Room
Example for the Chaptarr guild:
  • Discord (space)
    • Chaptarr (space)
      • 〔 Text Channels 💬〕 (sub-space)
        • #💬｜general-chat (room)
        • #📖｜book-worms (room)
        • …
      • 〔 Server Information ℹ️〕 (sub-space)
        • #📑｜rules (room)
        • …
      • 〔 Sponsors🪙〕 (sub-space, empty)
      • …
Key points:
  • Spaces can contain other spaces — that’s how guild → category nesting works
  • Only the leaf-level rooms have actual messages
  • Empty sub-spaces mean the Discord category has no channels you can access
  • The bridge bot (@discordbot) owns the spaces and rooms with power level 50

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Bridge Management

The bridge bot management room is a DM with @discordbot:augustin.ai. Commands:
CommandPurpose
!discord guilds statusList all guilds and bridging status
!discord guilds bridge <guild_id> --entireBridge all channels in a guild
!discord guilds unbridge <guild_id>Remove a guild bridge
!discord bridge <channel_id>Bridge a single channel

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Configuration

FilePurpose
compose.yamlAll services + Traefik labels
homeserver.yamlSynapse config (gitignored)
element-config.jsonElement Web client config
mautrix-discord/config.yamlBridge config (gitignored, owned by UID 1337)
mautrix-discord/registration.yamlAppservice registration (gitignored)

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Backfill Settings

Configured for aggressive backfill (in mautrix-discord/config.yaml):
  • Max initial channel messages: 1000
  • Max initial DM/thread messages: 500
  • Max missed messages: unlimited (-1)

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Bridged Guilds

All guilds from the logged-in Discord account are bridged with --entire: Chaptarr, Techno Tim, Palia, Latent Space, Hardcover, The Corner, Kindle Modding Community, TechStudyDiscord, BreaTheBook 3, Oasiz, Milq.ai.