Telegram EBA Adapter

Status

Telegram has been migrated to the EBA adapter directory:

src/langbot/pkg/platform/adapters/telegram/
├── adapter.py
├── api_impl.py
├── event_converter.py
├── manifest.yaml
├── message_converter.py
├── platform_api.py
└── types.py

The adapter is registered as telegram-eba.

Configuration

Field	Required	Default	Description
`token`	Yes	`""`	Telegram Bot API token from BotFather.
`markdown_card`	No	`true`	Whether to render Markdown card style replies.
`enable-stream-reply`	Yes	`false`	Whether to use Telegram streaming reply mode.

Events

Telegram declares these EBA events:

message.received
message.edited
message.reaction
group.member_joined
group.member_left
group.member_banned
bot.invited_to_group
bot.removed_from_group
bot.muted
bot.unmuted
platform.specific

platform.specific is currently used for Telegram-only callback and chat-member update payloads that do not yet have a more specific common event type.

Common APIs

API	Status	Notes
`send_message`	Supported	Supports text, image, file, and mixed message chains.
`reply_message`	Supported	Supports quoted replies through the original message event.
`edit_message`	Supported	Uses Telegram message editing APIs.
`delete_message`	Supported	Deletes messages where bot permissions allow it.
`forward_message`	Supported	Forwards a message between Telegram chats.
`get_group_info`	Supported	Uses Telegram chat metadata.
`get_group_member_list`	Supported	Telegram only exposes administrators through the Bot API; this returns the available member set.
`get_group_member_info`	Supported	Maps Telegram member status to EBA member roles.
`get_user_info`	Supported	Uses Telegram `get_chat` for user chat metadata.
`upload_file`	Not supported	Telegram has no standalone upload endpoint; files are uploaded as part of messages. The adapter raises `NotSupportedError`.
`get_file_url`	Supported	Returns the Bot API file URL. Test output redacts the bot token.
`mute_member`	Supported	Requires a supergroup and bot moderation permission.
`unmute_member`	Supported	Uses current `telegram.ChatPermissions` fields.
`kick_member`	Supported	Destructive; should only be run against disposable users/bots in tests.
`leave_group`	Supported	Destructive; should run at the end of a live test.
`call_platform_api`	Supported	See below.

Platform-Specific APIs

call_platform_api(action, params) supports:

pin_message
unpin_message
unpin_all_messages
get_chat_administrators
set_chat_title
set_chat_description
get_chat_member_count
send_chat_action
create_chat_invite_link
answer_callback_query

Live Test Record

The live probe is:

uv run python tests/e2e/live_telegram_eba_probe.py --help

It supports private chat tests, group/supergroup tests, moderation tests, destructive tests, and a callback-only mode.

Verified on May 7, 2026:

Private chat message APIs: send, reply, edit, delete, forward.
Private chat media APIs: image/file sending and get_file_url.
User API: get_user_info.
Supergroup APIs: group info, member list, member info, administrators, member count, invite link.
Supergroup mutation APIs: pin, unpin, unpin all, set title, restore title, set description, restore description.
Moderation APIs: mute and unmute against a non-owner target bot.
Destructive APIs: kick a disposable target bot, then make the test bot leave the test group.
Event conversion observed for message.received, group.member_banned, group.member_left, bot.removed_from_group, and Telegram-specific chat-member updates.

The test fixed one real compatibility issue: unmute_member previously used Telegram's removed can_send_media_messages permission field. It now uses the split media permission fields required by current python-telegram-bot.

Notes for Future Adapters

Telegram is the reference implementation for:

Keeping platform-specific actions behind call_platform_api.
Treating unsupported common APIs as explicit NotSupportedError.
Marking destructive live test operations behind CLI flags.
Redacting access tokens from live probe output.

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