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docs: add Mattermost and Matrix setup guides

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Full Docusaurus docs following the Discord guide structure:

Mattermost (277 lines):
- Step-by-step: enable bot accounts, create bot, get token, add to channels
- All env vars documented with examples
- Reply mode (thread/off), home channel, troubleshooting

Matrix (354 lines):
- Step-by-step: create bot account, get access token (Element or API)
- Dual auth (token + password), E2EE section with libolm install
- Thread support, DM detection, home room, troubleshooting
- Works with any homeserver (Synapse, Conduit, Dendrite, matrix.org)
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---
sidebar_position: 9
title: "Matrix"
description: "Set up Hermes Agent as a Matrix bot"
---
# Matrix Setup
Hermes Agent integrates with Matrix, the open, federated messaging protocol. Matrix lets you run your own homeserver or use a public one like matrix.org — either way, you keep control of your communications. The bot connects via the `matrix-nio` Python SDK, processes messages through the Hermes Agent pipeline (including tool use, memory, and reasoning), and responds in real time. It supports text, file attachments, images, audio, video, and optional end-to-end encryption (E2EE).
Hermes works with any Matrix homeserver — Synapse, Conduit, Dendrite, or matrix.org.
Before setup, here's the part most people want to know: how Hermes behaves once it's connected.
## How Hermes Behaves
| Context | Behavior |
|---------|----------|
| **DMs** | Hermes responds to every message. No `@mention` needed. Each DM has its own session. |
| **Rooms** | Hermes responds to all messages in rooms it has joined. Room invites are auto-accepted. |
| **Threads** | Hermes supports Matrix threads (MSC3440). If you reply in a thread, Hermes keeps the thread context isolated from the main room timeline. |
| **Shared rooms with multiple users** | By default, Hermes isolates session history per user inside the room. Two people talking in the same room do not share one transcript unless you explicitly disable that. |
:::tip
The bot automatically joins rooms when invited. Just invite the bot's Matrix user to any room and it will join and start responding.
:::
### Session Model in Matrix
By default:
- each DM gets its own session
- each thread gets its own session namespace
- each user in a shared room gets their own session inside that room
This is controlled by `config.yaml`:
```yaml
group_sessions_per_user: true
```
Set it to `false` only if you explicitly want one shared conversation for the entire room:
```yaml
group_sessions_per_user: false
```
Shared sessions can be useful for a collaborative room, but they also mean:
- users share context growth and token costs
- one person's long tool-heavy task can bloat everyone else's context
- one person's in-flight run can interrupt another person's follow-up in the same room
This guide walks you through the full setup process — from creating your bot account to sending your first message.
## Step 1: Create a Bot Account
You need a Matrix user account for the bot. There are several ways to do this:
### Option A: Register on Your Homeserver (Recommended)
If you run your own homeserver (Synapse, Conduit, Dendrite):
1. Use the admin API or registration tool to create a new user:
```bash
# Synapse example
register_new_matrix_user -c /etc/synapse/homeserver.yaml http://localhost:8008
```
2. Choose a username like `hermes` — the full user ID will be `@hermes:your-server.org`.
### Option B: Use matrix.org or Another Public Homeserver
1. Go to [Element Web](https://app.element.io) and create a new account.
2. Pick a username for your bot (e.g., `hermes-bot`).
### Option C: Use Your Own Account
You can also run Hermes as your own user. This means the bot posts as you — useful for personal assistants.
## Step 2: Get an Access Token
Hermes needs an access token to authenticate with the homeserver. You have two options:
### Option A: Access Token (Recommended)
The most reliable way to get a token:
**Via Element:**
1. Log in to [Element](https://app.element.io) with the bot account.
2. Go to **Settings** → **Help & About**.
3. Scroll down and expand **Advanced** — the access token is displayed there.
4. **Copy it immediately.**
**Via the API:**
```bash
curl -X POST https://your-server/_matrix/client/v3/login \
-H "Content-Type: application/json" \
-d '{
"type": "m.login.password",
"user": "@hermes:your-server.org",
"password": "your-password"
}'
```
The response includes an `access_token` field — copy it.
:::warning[Keep your access token safe]
The access token gives full access to the bot's Matrix account. Never share it publicly or commit it to Git. If compromised, revoke it by logging out all sessions for that user.
:::
### Option B: Password Login
Instead of providing an access token, you can give Hermes the bot's user ID and password. Hermes will log in automatically on startup. This is simpler but means the password is stored in your `.env` file.
```bash
MATRIX_USER_ID=@hermes:your-server.org
MATRIX_PASSWORD=your-password
```
## Step 3: Find Your Matrix User ID
Hermes Agent uses your Matrix User ID to control who can interact with the bot. Matrix User IDs follow the format `@username:server`.
To find yours:
1. Open [Element](https://app.element.io) (or your preferred Matrix client).
2. Click your avatar → **Settings**.
3. Your User ID is displayed at the top of the profile (e.g., `@alice:matrix.org`).
:::tip
Matrix User IDs always start with `@` and contain a `:` followed by the server name. For example: `@alice:matrix.org`, `@bob:your-server.com`.
:::
## Step 4: Configure Hermes Agent
### Option A: Interactive Setup (Recommended)
Run the guided setup command:
```bash
hermes gateway setup
```
Select **Matrix** when prompted, then provide your homeserver URL, access token (or user ID + password), and allowed user IDs when asked.
### Option B: Manual Configuration
Add the following to your `~/.hermes/.env` file:
**Using an access token:**
```bash
# Required
MATRIX_HOMESERVER=https://matrix.example.org
MATRIX_ACCESS_TOKEN=***
# Optional: user ID (auto-detected from token if omitted)
# MATRIX_USER_ID=@hermes:matrix.example.org
# Security: restrict who can interact with the bot
MATRIX_ALLOWED_USERS=@alice:matrix.example.org
# Multiple allowed users (comma-separated)
# MATRIX_ALLOWED_USERS=@alice:matrix.example.org,@bob:matrix.example.org
```
**Using password login:**
```bash
# Required
MATRIX_HOMESERVER=https://matrix.example.org
MATRIX_USER_ID=@hermes:matrix.example.org
MATRIX_PASSWORD=***
# Security
MATRIX_ALLOWED_USERS=@alice:matrix.example.org
```
Optional behavior settings in `~/.hermes/config.yaml`:
```yaml
group_sessions_per_user: true
```
- `group_sessions_per_user: true` keeps each participant's context isolated inside shared rooms
### Start the Gateway
Once configured, start the Matrix gateway:
```bash
hermes gateway
```
The bot should connect to your homeserver and start syncing within a few seconds. Send it a message — either a DM or in a room it has joined — to test.
:::tip
You can run `hermes gateway` in the background or as a systemd service for persistent operation. See the deployment docs for details.
:::
## End-to-End Encryption (E2EE)
Hermes supports Matrix end-to-end encryption, so you can chat with your bot in encrypted rooms.
### Requirements
E2EE requires the `matrix-nio` library with encryption extras and the `libolm` C library:
```bash
# Install matrix-nio with E2EE support
pip install 'matrix-nio[e2e]'
# Or install with hermes extras
pip install 'hermes-agent[matrix]'
```
You also need `libolm` installed on your system:
```bash
# Debian/Ubuntu
sudo apt install libolm-dev
# macOS
brew install libolm
# Fedora
sudo dnf install libolm-devel
```
### Enable E2EE
Add to your `~/.hermes/.env`:
```bash
MATRIX_ENCRYPTION=true
```
When E2EE is enabled, Hermes:
- Stores encryption keys in `~/.hermes/matrix/store/`
- Uploads device keys on first connection
- Decrypts incoming messages and encrypts outgoing messages automatically
- Auto-joins encrypted rooms when invited
:::warning
If you delete the `~/.hermes/matrix/store/` directory, the bot loses its encryption keys. You'll need to verify the device again in your Matrix client. Back up this directory if you want to preserve encrypted sessions.
:::
:::info
If `matrix-nio[e2e]` is not installed or `libolm` is missing, the bot falls back to a plain (unencrypted) client automatically. You'll see a warning in the logs.
:::
## Home Room
You can designate a "home room" where the bot sends proactive messages (such as cron job output, reminders, and notifications). There are two ways to set it:
### Using the Slash Command
Type `/sethome` in any Matrix room where the bot is present. That room becomes the home room.
### Manual Configuration
Add this to your `~/.hermes/.env`:
```bash
MATRIX_HOME_ROOM=!abc123def456:matrix.example.org
```
:::tip
To find a Room ID: in Element, go to the room → **Settings** → **Advanced** → the **Internal room ID** is shown there (starts with `!`).
:::
## Troubleshooting
### Bot is not responding to messages
**Cause**: The bot hasn't joined the room, or `MATRIX_ALLOWED_USERS` doesn't include your User ID.
**Fix**: Invite the bot to the room — it auto-joins on invite. Verify your User ID is in `MATRIX_ALLOWED_USERS` (use the full `@user:server` format). Restart the gateway.
### "Failed to authenticate" / "whoami failed" on startup
**Cause**: The access token or homeserver URL is incorrect.
**Fix**: Verify `MATRIX_HOMESERVER` points to your homeserver (include `https://`, no trailing slash). Check that `MATRIX_ACCESS_TOKEN` is valid — try it with curl:
```bash
curl -H "Authorization: Bearer YOUR_TOKEN" \
https://your-server/_matrix/client/v3/account/whoami
```
If this returns your user info, the token is valid. If it returns an error, generate a new token.
### "matrix-nio not installed" error
**Cause**: The `matrix-nio` Python package is not installed.
**Fix**: Install it:
```bash
pip install 'matrix-nio[e2e]'
```
Or with Hermes extras:
```bash
pip install 'hermes-agent[matrix]'
```
### Encryption errors / "could not decrypt event"
**Cause**: Missing encryption keys, `libolm` not installed, or the bot's device isn't trusted.
**Fix**:
1. Verify `libolm` is installed on your system (see the E2EE section above).
2. Make sure `MATRIX_ENCRYPTION=true` is set in your `.env`.
3. In your Matrix client (Element), go to the bot's profile → **Sessions** → verify/trust the bot's device.
4. If the bot just joined an encrypted room, it can only decrypt messages sent *after* it joined. Older messages are inaccessible.
### Sync issues / bot falls behind
**Cause**: Long-running tool executions can delay the sync loop, or the homeserver is slow.
**Fix**: The sync loop automatically retries every 5 seconds on error. Check the Hermes logs for sync-related warnings. If the bot consistently falls behind, ensure your homeserver has adequate resources.
### Bot is offline
**Cause**: The Hermes gateway isn't running, or it failed to connect.
**Fix**: Check that `hermes gateway` is running. Look at the terminal output for error messages. Common issues: wrong homeserver URL, expired access token, homeserver unreachable.
### "User not allowed" / Bot ignores you
**Cause**: Your User ID isn't in `MATRIX_ALLOWED_USERS`.
**Fix**: Add your User ID to `MATRIX_ALLOWED_USERS` in `~/.hermes/.env` and restart the gateway. Use the full `@user:server` format.
## Security
:::warning
Always set `MATRIX_ALLOWED_USERS` to restrict who can interact with the bot. Without it, the gateway denies all users by default as a safety measure. Only add User IDs of people you trust — authorized users have full access to the agent's capabilities, including tool use and system access.
:::
For more information on securing your Hermes Agent deployment, see the [Security Guide](../security.md).
## Notes
- **Any homeserver**: Works with Synapse, Conduit, Dendrite, matrix.org, or any spec-compliant Matrix homeserver. No specific homeserver software required.
- **Federation**: If you're on a federated homeserver, the bot can communicate with users from other servers — just add their full `@user:server` IDs to `MATRIX_ALLOWED_USERS`.
- **Auto-join**: The bot automatically accepts room invites and joins. It starts responding immediately after joining.
- **Media support**: Hermes can send and receive images, audio, video, and file attachments. Media is uploaded to your homeserver using the Matrix content repository API.

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---
sidebar_position: 8
title: "Mattermost"
description: "Set up Hermes Agent as a Mattermost bot"
---
# Mattermost Setup
Hermes Agent integrates with Mattermost as a bot, letting you chat with your AI assistant through direct messages or team channels. Mattermost is a self-hosted, open-source Slack alternative — you run it on your own infrastructure, keeping full control of your data. The bot connects via Mattermost's REST API (v4) and WebSocket for real-time events, processes messages through the Hermes Agent pipeline (including tool use, memory, and reasoning), and responds in real time. It supports text, file attachments, images, and slash commands.
No external Mattermost library is required — the adapter uses `aiohttp`, which is already a Hermes dependency.
Before setup, here's the part most people want to know: how Hermes behaves once it's in your Mattermost instance.
## How Hermes Behaves
| Context | Behavior |
|---------|----------|
| **DMs** | Hermes responds to every message. No `@mention` needed. Each DM has its own session. |
| **Public/private channels** | Hermes responds when you `@mention` it. Without a mention, Hermes ignores the message. |
| **Threads** | If `MATTERMOST_REPLY_MODE=thread`, Hermes replies in a thread under your message. Thread context stays isolated from the parent channel. |
| **Shared channels with multiple users** | By default, Hermes isolates session history per user inside the channel. Two people talking in the same channel do not share one transcript unless you explicitly disable that. |
:::tip
If you want Hermes to reply as threaded conversations (nested under your original message), set `MATTERMOST_REPLY_MODE=thread`. The default is `off`, which sends flat messages in the channel.
:::
### Session Model in Mattermost
By default:
- each DM gets its own session
- each thread gets its own session namespace
- each user in a shared channel gets their own session inside that channel
This is controlled by `config.yaml`:
```yaml
group_sessions_per_user: true
```
Set it to `false` only if you explicitly want one shared conversation for the entire channel:
```yaml
group_sessions_per_user: false
```
Shared sessions can be useful for a collaborative channel, but they also mean:
- users share context growth and token costs
- one person's long tool-heavy task can bloat everyone else's context
- one person's in-flight run can interrupt another person's follow-up in the same channel
This guide walks you through the full setup process — from creating your bot on Mattermost to sending your first message.
## Step 1: Enable Bot Accounts
Bot accounts must be enabled on your Mattermost server before you can create one.
1. Log in to Mattermost as a **System Admin**.
2. Go to **System Console** → **Integrations** → **Bot Accounts**.
3. Set **Enable Bot Account Creation** to **true**.
4. Click **Save**.
:::info
If you don't have System Admin access, ask your Mattermost administrator to enable bot accounts and create one for you.
:::
## Step 2: Create a Bot Account
1. In Mattermost, click the **☰** menu (top-left) → **Integrations** → **Bot Accounts**.
2. Click **Add Bot Account**.
3. Fill in the details:
- **Username**: e.g., `hermes`
- **Display Name**: e.g., `Hermes Agent`
- **Description**: optional
- **Role**: `Member` is sufficient
4. Click **Create Bot Account**.
5. Mattermost will display the **bot token**. **Copy it immediately.**
:::warning[Token shown only once]
The bot token is only displayed once when you create the bot account. If you lose it, you'll need to regenerate it from the bot account settings. Never share your token publicly or commit it to Git — anyone with this token has full control of the bot.
:::
Store the token somewhere safe (a password manager, for example). You'll need it in Step 5.
:::tip
You can also use a **personal access token** instead of a bot account. Go to **Profile** → **Security** → **Personal Access Tokens** → **Create Token**. This is useful if you want Hermes to post as your own user rather than a separate bot user.
:::
## Step 3: Add the Bot to Channels
The bot needs to be a member of any channel where you want it to respond:
1. Open the channel where you want the bot.
2. Click the channel name → **Add Members**.
3. Search for your bot username (e.g., `hermes`) and add it.
For DMs, simply open a direct message with the bot — it will be able to respond immediately.
## Step 4: Find Your Mattermost User ID
Hermes Agent uses your Mattermost User ID to control who can interact with the bot. To find it:
1. Click your **avatar** (top-left corner) → **Profile**.
2. Your User ID is displayed in the profile dialog — click it to copy.
Your User ID is a 26-character alphanumeric string like `3uo8dkh1p7g1mfk49ear5fzs5c`.
:::warning
Your User ID is **not** your username. The username is what appears after `@` (e.g., `@alice`). The User ID is a long alphanumeric identifier that Mattermost uses internally.
:::
**Alternative**: You can also get your User ID via the API:
```bash
curl -H "Authorization: Bearer YOUR_TOKEN" \
https://your-mattermost-server/api/v4/users/me | jq .id
```
:::tip
To get a **Channel ID**: click the channel name → **View Info**. The Channel ID is shown in the info panel. You'll need this if you want to set a home channel manually.
:::
## Step 5: Configure Hermes Agent
### Option A: Interactive Setup (Recommended)
Run the guided setup command:
```bash
hermes gateway setup
```
Select **Mattermost** when prompted, then paste your server URL, bot token, and user ID when asked.
### Option B: Manual Configuration
Add the following to your `~/.hermes/.env` file:
```bash
# Required
MATTERMOST_URL=https://mm.example.com
MATTERMOST_TOKEN=***
MATTERMOST_ALLOWED_USERS=3uo8dkh1p7g1mfk49ear5fzs5c
# Multiple allowed users (comma-separated)
# MATTERMOST_ALLOWED_USERS=3uo8dkh1p7g1mfk49ear5fzs5c,8fk2jd9s0a7bncm1xqw4tp6r3e
# Optional: reply mode (thread or off, default: off)
# MATTERMOST_REPLY_MODE=thread
```
Optional behavior settings in `~/.hermes/config.yaml`:
```yaml
group_sessions_per_user: true
```
- `group_sessions_per_user: true` keeps each participant's context isolated inside shared channels and threads
### Start the Gateway
Once configured, start the Mattermost gateway:
```bash
hermes gateway
```
The bot should connect to your Mattermost server within a few seconds. Send it a message — either a DM or in a channel where it's been added — to test.
:::tip
You can run `hermes gateway` in the background or as a systemd service for persistent operation. See the deployment docs for details.
:::
## Home Channel
You can designate a "home channel" where the bot sends proactive messages (such as cron job output, reminders, and notifications). There are two ways to set it:
### Using the Slash Command
Type `/sethome` in any Mattermost channel where the bot is present. That channel becomes the home channel.
### Manual Configuration
Add this to your `~/.hermes/.env`:
```bash
MATTERMOST_HOME_CHANNEL=abc123def456ghi789jkl012mn
```
Replace the ID with the actual channel ID (click the channel name → View Info → copy the ID).
## Reply Mode
The `MATTERMOST_REPLY_MODE` setting controls how Hermes posts responses:
| Mode | Behavior |
|------|----------|
| `off` (default) | Hermes posts flat messages in the channel, like a normal user. |
| `thread` | Hermes replies in a thread under your original message. Keeps channels clean when there's lots of back-and-forth. |
Set it in your `~/.hermes/.env`:
```bash
MATTERMOST_REPLY_MODE=thread
```
## Troubleshooting
### Bot is not responding to messages
**Cause**: The bot is not a member of the channel, or `MATTERMOST_ALLOWED_USERS` doesn't include your User ID.
**Fix**: Add the bot to the channel (channel name → Add Members → search for the bot). Verify your User ID is in `MATTERMOST_ALLOWED_USERS`. Restart the gateway.
### 403 Forbidden errors
**Cause**: The bot token is invalid, or the bot doesn't have permission to post in the channel.
**Fix**: Check that `MATTERMOST_TOKEN` in your `.env` file is correct. Make sure the bot account hasn't been deactivated. Verify the bot has been added to the channel. If using a personal access token, ensure your account has the required permissions.
### WebSocket disconnects / reconnection loops
**Cause**: Network instability, Mattermost server restarts, or firewall/proxy issues with WebSocket connections.
**Fix**: The adapter automatically reconnects with exponential backoff (2s → 60s). Check your server's WebSocket configuration — reverse proxies (nginx, Apache) need WebSocket upgrade headers configured. Verify no firewall is blocking WebSocket connections on your Mattermost server.
For nginx, ensure your config includes:
```nginx
location /api/v4/websocket {
proxy_pass http://mattermost-backend;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 600s;
}
```
### "Failed to authenticate" on startup
**Cause**: The token or server URL is incorrect.
**Fix**: Verify `MATTERMOST_URL` points to your Mattermost server (include `https://`, no trailing slash). Check that `MATTERMOST_TOKEN` is valid — try it with curl:
```bash
curl -H "Authorization: Bearer YOUR_TOKEN" \
https://your-server/api/v4/users/me
```
If this returns your bot's user info, the token is valid. If it returns an error, regenerate the token.
### Bot is offline
**Cause**: The Hermes gateway isn't running, or it failed to connect.
**Fix**: Check that `hermes gateway` is running. Look at the terminal output for error messages. Common issues: wrong URL, expired token, Mattermost server unreachable.
### "User not allowed" / Bot ignores you
**Cause**: Your User ID isn't in `MATTERMOST_ALLOWED_USERS`.
**Fix**: Add your User ID to `MATTERMOST_ALLOWED_USERS` in `~/.hermes/.env` and restart the gateway. Remember: the User ID is a 26-character alphanumeric string, not your `@username`.
## Security
:::warning
Always set `MATTERMOST_ALLOWED_USERS` to restrict who can interact with the bot. Without it, the gateway denies all users by default as a safety measure. Only add User IDs of people you trust — authorized users have full access to the agent's capabilities, including tool use and system access.
:::
For more information on securing your Hermes Agent deployment, see the [Security Guide](../security.md).
## Notes
- **Self-hosted friendly**: Works with any self-hosted Mattermost instance. No Mattermost Cloud account or subscription required.
- **No extra dependencies**: The adapter uses `aiohttp` for HTTP and WebSocket, which is already included with Hermes Agent.
- **Team Edition compatible**: Works with both Mattermost Team Edition (free) and Enterprise Edition.