This document catalogs all platform-specific extensions. The AI assistant should reference this when users ask about platform-specific capabilities.

Agent note: For Discord id semantics (channel vs user, DM vs discord_send_message, interaction followups), the canonical short guide is discord-node-semantics.md, which is always included in the Studio agent system prompt.

Discord Extensions (67 total)

Discord is the most mature platform integration. Requires: Bot Token, Application ID, and optionally a Guild ID.

Discord Triggers (26)

Message Triggers

Extension	Description	Key Output Fields
Message Create	Fires when a new message is sent	`content`, `author` (id, username, discriminator, avatar, bot), `channelId`, `guildId`, `attachments`, `embeds`, `mentions`
Message Update	Fires when a message is edited	`content`, `author`, `channelId`, `oldContent`
Message Delete	Fires when a message is deleted	`messageId`, `channelId`, `guildId`
Message Bulk Delete	Fires when multiple messages are deleted at once	`messageIds`, `channelId`, `guildId`
Message Reaction Add	Fires when a reaction is added to a message	`emoji` (name, id), `userId`, `channelId`, `messageId`, `guildId`
Message Reaction Remove	Fires when a reaction is removed	`emoji`, `userId`, `channelId`, `messageId`

Interaction Triggers

Extension	Description	Key Output Fields
Slash Command	Fires when a user invokes a registered slash command	`commandName`, `options` (array of name/value pairs), `user`, `channelId`, `guildId`, `interactionId`, `interactionToken`
Button Click	Fires when a user clicks a button component	`customId`, `user`, `channelId`, `messageId`, `interactionId`, `interactionToken`
Select Menu	Fires when a user makes a selection from a select menu	`customId`, `values` (array), `user`, `channelId`, `interactionId`, `interactionToken`
Modal Submit	Fires when a user submits a modal form	`customId`, `fields` (array of id/value pairs), `user`, `interactionId`, `interactionToken`
Autocomplete	Fires when a user types in an autocomplete-enabled command option	`commandName`, `focusedOption`, `currentValue`, `interactionId`, `interactionToken`

Guild & Member Triggers

Extension	Description	Key Output Fields
Guild Member Add	Fires when a new member joins the server	`user` (id, username, avatar, bot), `guildId`, `joinedAt`, `roles`, `nickname`
Guild Member Remove	Fires when a member leaves or is removed	`user`, `guildId`
Guild Member Update	Fires when a member's roles, nickname, etc. change	`user`, `guildId`, `roles`, `nickname`, `oldNickname`
Guild Create	Fires when the bot joins a new guild	`guildId`, `name`, `memberCount`
Guild Delete	Fires when the bot is removed from a guild	`guildId`
Guild Ban Add	Fires when a member is banned	`user`, `guildId`, `reason`
Guild Ban Remove	Fires when a ban is lifted	`user`, `guildId`
Guild Role Create	Fires when a new role is created	`role` (id, name, color, permissions), `guildId`
Guild Role Delete	Fires when a role is deleted	`roleId`, `guildId`
Guild Role Update	Fires when a role is modified	`role`, `guildId`, `oldRole`

Channel Triggers

Extension	Description	Key Output Fields
Channel Create	Fires when a new channel is created	`channel` (id, name, type, parentId), `guildId`
Channel Delete	Fires when a channel is deleted	`channelId`, `guildId`
Channel Update	Fires when a channel is modified	`channel`, `guildId`, `oldChannel`
Channel Pins Update	Fires when channel pins are updated	`channelId`, `guildId`, `lastPinTimestamp`

Thread Triggers

Extension	Description	Key Output Fields
Thread Create	Fires when a new thread is created	`thread` (id, name, parentId), `guildId`
Thread Delete	Fires when a thread is deleted	`threadId`, `guildId`
Thread Update	Fires when a thread is modified	`thread`, `guildId`

Other Triggers

Extension	Description	Key Output Fields
Voice State Update	Fires when a user joins/leaves/moves voice channels	`userId`, `channelId`, `oldChannelId`, `guildId`, `selfMute`, `selfDeaf`, `serverMute`, `serverDeaf`
Scheduled Event Create	Fires when a scheduled event is created	`event` (name, description, scheduledStartTime), `guildId`
Typing Start	Fires when a user starts typing	`userId`, `channelId`, `guildId`, `timestamp`

Discord Actions (41)

Message Actions

Extension	Key Config/Inputs	Description
Send Message	`channelId`, `content`, `embeds`, `components`	Post in a guild channel, thread, or forum — `channelId` MUST be a Discord channel snowflake (not a user id). Using a user id → 404 Unknown Channel.
Send DM	`userId`, `content`, `embeds`, `components`	Private message to a user; opens/creates the DM channel. Use for per-user welcomes or off-channel notices. Do not use Send Message with the user’s id as `channelId`.
Edit Message	`channelId`, `messageId`, `content`, `embeds`	Edit an existing message.
Delete Message	`channelId`, `messageId`	Delete a message.
Get Message	`channelId`, `messageId`	Fetch a message's full data.
Add Reaction	`channelId`, `messageId`, `emoji`	Add a reaction emoji to a message.
Remove Reaction	`channelId`, `messageId`, `emoji`, `userId`	Remove a reaction from a message.
Pin Message	`channelId`, `messageId`	Pin a message to the channel.
Unpin Message	`channelId`, `messageId`	Unpin a pinned message.
Use Message Template	`templateId`, `variables`	Send a message using a pre-defined template with variable substitution.

Interaction Response Actions

Extension	Key Config/Inputs	Description
Interaction Response	`interactionId`, `interactionToken`, `type`, `content`, `embeds`, `components`, `ephemeral`	Respond to a slash command, button, select menu, or modal. Supports ephemeral (private) responses.
Followup Message	`interactionToken`, `content`, `embeds`, `ephemeral`	Send a follow-up message after an initial interaction response.
Autocomplete Response	`interactionId`, `interactionToken`, `choices`	Respond to an autocomplete trigger with a list of choices.

Member Management Actions

Extension	Key Config/Inputs	Description
Add Role	`guildId`, `userId`, `roleId`	Assign a role to a member.
Remove Role	`guildId`, `userId`, `roleId`	Remove a role from a member.
Set Nickname	`guildId`, `userId`, `nickname`	Change a member's nickname.
Kick Member	`guildId`, `userId`, `reason`	Kick a member from the server.
Ban Member	`guildId`, `userId`, `reason`, `deleteMessageDays`	Ban a member and optionally delete their recent messages.
Unban Member	`guildId`, `userId`	Remove a ban from a user.
Timeout Member	`guildId`, `userId`, `duration` (ms, confirm via schema), `reason`	Temporarily timeout a member. Field names: use `get_extension_schema` — catalog tables may lag the DB definition.
Remove Timeout	`guildId`, `userId`	Remove a timeout from a member.
Move Member	`guildId`, `userId`, `channelId`	Move a member to a different voice channel.
Get User	`userId`	Fetch a user's profile data.

Channel Management Actions

Extension	Key Config/Inputs	Description
Create Channel	`guildId`, `name`, `type`, `parentId`, `topic`, `nsfw`, `bitrate`, `userLimit`, `permissionOverwrites`	Create a new text, voice, or category channel.
Delete Channel	`channelId`	Delete a channel.
Edit Channel	`channelId`, `name`, `topic`, `nsfw`, `bitrate`, `userLimit`	Modify channel properties.

Thread Management Actions

Extension	Key Config/Inputs	Description
Create Thread	`channelId`, `name`, `autoArchiveDuration`, `type`, `messageId`	Create a new thread, optionally from a message.
Archive Thread	`threadId`	Archive a thread.
Unarchive Thread	`threadId`	Unarchive a thread.
Lock Thread	`threadId`	Lock a thread (prevent new messages).
Unlock Thread	`threadId`	Unlock a thread.

Role Management Actions

Extension	Key Config/Inputs	Description
Create Role	`guildId`, `name`, `color`, `hoist`, `mentionable`, `permissions`	Create a new role.
Delete Role	`guildId`, `roleId`	Delete a role.

Webhook Actions

Extension	Key Config/Inputs	Description
Create Webhook	`channelId`, `name`, `avatar`	Create a new webhook for a channel.
Execute Webhook	`webhookId`, `webhookToken`, `content`, `username`, `avatarUrl`, `embeds`	Send a message via webhook (can impersonate any name/avatar).

Other Actions

Extension	Key Config/Inputs	Description
Create Invite	`channelId`, `maxAge`, `maxUses`, `temporary`, `unique`	Create a server invite link.

Slack Extensions (live)

Slack is a production platform integration. Setup, secrets, and connection steps: platforms/slack.md.

Secrets: SLACK_BOT_TOKEN, SLACK_SIGNING_SECRET

Agent notes:

DM vs channel: slack_send_dm uses userId (U…). slack_send_message uses channelId (C… or D…). Do not pass a user id as channelId.
DM detection: Slack DM channel ids start with D. Filter with if_condition on {{outputs.<trigger-node-id>.channelId}} startsWith D when using slack_message (see Template strings).
Trigger outputs (slack_message): channelId, userId, text, ts, threadTs, teamId

Slack Triggers (extension keys)

Extension key	Fires when	Key outputs
`slack_message`	Message in channel or DM	`channelId`, `userId`, `text`, `ts`, `threadTs`
`slack_app_mention`	Bot @mentioned	`channelId`, `userId`, `text`, `ts`
`slack_slash_command`	Registered slash command	`command`, `text`, `user_id`, `channel_id`, `response_url`
`slack_reaction_added`	Reaction added	`emoji`, `userId`, `channelId`, `message_ts`
`slack_reaction_removed`	Reaction removed	same as added
`slack_member_joined`	Member joined workspace	`userId`, `teamId`
`slack_member_left`	Member left	`userId`, `teamId`
`slack_block_action`	Button / Block Kit action	`action_id`, `value`, `user`, `channel`, `response_url`
`slack_view_submission`	Modal submitted	`callback_id`, `user`, `values`
`slack_shortcut`	Global/message shortcut	`callback_id`, `user`, `channel`
`slack_workflow_step_execute`	Workflow step executed	workflow payload

Slack Actions (extension keys)

Extension key	Required config	Notes
`slack_send_message`	`channelId`, `text`	Guild channel, thread, or DM channel id
`slack_send_dm`	`userId`, `text`	Opens DM with user
`slack_send_blocks`	`channelId`, `blocks`	Block Kit JSON
`slack_reply_in_thread`	`channelId`, `thread_ts`, `text`	Thread reply
`slack_update_message`	`channelId`, `ts`, `text`	Edit message
`slack_delete_message`	`channelId`, `ts`	Delete message
`slack_ephemeral_message`	`channelId`, `userId`, `text`	Visible to one user in channel
`slack_respond_to_command`	`response_url`, `text`	Reply to slash command
`slack_add_reaction`	`channelId`, `timestamp`, `name`	Emoji name
`slack_remove_reaction`	`channelId`, `timestamp`, `name`
`slack_open_modal`	`trigger_id`, `view`	Modal JSON
`slack_update_modal`	`view_id`, `view`
`slack_get_channel_info`	`channelId`
`slack_get_user_info`	`userId`
`slack_get_channel_members`	`channelId`
`slack_set_channel_topic`	`channelId`, `topic`
`slack_upload_file`	`channels`, `content`	File upload

Telegram Extensions (live)

Telegram is a production platform integration. Setup and token: platforms/telegram.md.

Secrets: TELEGRAM_BOT_TOKEN