Merge pull request #1428 from bestparents/feat/mattermost-channel

feat: add Mattermost channel support

docs/cli/channels.md

@@ -1,7 +1,7 @@
 ---
 summary: "CLI reference for `clawdbot channels` (accounts, status, login/logout, logs)"
 read_when:
-  - You want to add/remove channel accounts (WhatsApp/Telegram/Discord/Slack/Signal/iMessage)
+  - You want to add/remove channel accounts (WhatsApp/Telegram/Discord/Slack/Mattermost/Signal/iMessage)
   - You want to check channel status or tail channel logs
 ---
 

docs/cli/index.md

@@ -352,7 +352,7 @@ Options:
 ## Channel helpers
 
 ### `channels`
-Manage chat channel accounts (WhatsApp/Telegram/Discord/Slack/Signal/iMessage/MS Teams).
+Manage chat channel accounts (WhatsApp/Telegram/Discord/Slack/Mattermost/Signal/iMessage/MS Teams).
 
 Subcommands:
 - `channels list`: show configured channels and auth profiles (Claude Code + Codex CLI OAuth sync included).
@@ -365,7 +365,7 @@ Subcommands:
 - `channels logout`: log out of a channel session (if supported).
 
 Common options:
-- `--channel <name>`: `whatsapp|telegram|discord|slack|signal|imessage|msteams`
+- `--channel <name>`: `whatsapp|telegram|discord|slack|mattermost|signal|imessage|msteams`
 - `--account <id>`: channel account id (default `default`)
 - `--name <label>`: display name for the account
 
@@ -472,7 +472,7 @@ Options:
 - `--session-id <id>`
 - `--thinking <off|minimal|low|medium|high|xhigh>` (GPT-5.2 + Codex models only)
 - `--verbose <on|full|off>`
-- `--channel <whatsapp|telegram|discord|slack|signal|imessage>`
+- `--channel <whatsapp|telegram|discord|slack|mattermost|signal|imessage|msteams>`
 - `--local`
 - `--deliver`
 - `--json`

docs/cli/message.md

@@ -8,7 +8,7 @@ read_when:
 # `clawdbot message`
 
 Single outbound command for sending messages and channel actions
-(Discord/Slack/Telegram/WhatsApp/Signal/iMessage/MS Teams).
+(Discord/Slack/Mattermost/Telegram/WhatsApp/Signal/iMessage/MS Teams).
 
 ## Usage
 
@@ -19,13 +19,14 @@ clawdbot message <subcommand> [flags]
 Channel selection:
 - `--channel` required if more than one channel is configured.
 - If exactly one channel is configured, it becomes the default.
-- Values: `whatsapp|telegram|discord|slack|signal|imessage|msteams`
+- Values: `whatsapp|telegram|discord|slack|mattermost|signal|imessage|msteams`
 
 Target formats (`--target`):
 - WhatsApp: E.164 or group JID
 - Telegram: chat id or `@username`
 - Discord: `channel:<id>` or `user:<id>` (or `<@id>` mention; raw numeric ids are treated as channels)
 - Slack: `channel:<id>` or `user:<id>` (raw channel id is accepted)
+- Mattermost: `channel:<id>`, `user:<id>`, or `@username` (bare ids are treated as channels)
 - Signal: `+E.164`, `group:<id>`, `signal:+E.164`, `signal:group:<id>`, or `username:<name>`/`u:<name>`
 - iMessage: handle, `chat_id:<id>`, `chat_guid:<guid>`, or `chat_identifier:<id>`
 - MS Teams: conversation id (`19:...@thread.tacv2`) or `conversation:<id>` or `user:<aad-object-id>`
@@ -49,7 +50,7 @@ Name lookup:
 ### Core
 
 - `send`
-  - Channels: WhatsApp/Telegram/Discord/Slack/Signal/iMessage/MS Teams
+  - Channels: WhatsApp/Telegram/Discord/Slack/Mattermost/Signal/iMessage/MS Teams
   - Required: `--target`, plus `--message` or `--media`
   - Optional: `--media`, `--reply-to`, `--thread-id`, `--gif-playback`
   - Telegram only: `--buttons` (requires `channels.telegram.capabilities.inlineButtons` to allow it)