# Slack EBA Adapter

## Structure

Slack is migrated into `src/langbot/pkg/platform/adapters/slack/` with the standard EBA adapter layout:

- `adapter.py` owns lifecycle, listener dispatch, unified webhook handling, outbound send/reply, and event caches.
- `event_converter.py` maps Slack `im` and `app_mention` channel events to `message.received`.
- `message_converter.py` maps common `MessageChain` components to Slack text fallback and maps inbound Slack text/image payloads back to EBA components.
- `api_impl.py` provides cache-backed common read APIs.
- `platform_api.py` declares safe Slack-specific API actions.
- `manifest.yaml` declares `slack-eba`.

The legacy `src/langbot/pkg/platform/sources/slack.py` adapter is kept unchanged.

## Configuration

| Field | Required | Notes |
|-------|----------|-------|
| `webhook_url` | No | Generated by LangBot. Paste it into Slack Event Subscriptions. |
| `bot_token` | Yes | Slack bot token, usually `xoxb-...`. |
| `signing_secret` | Yes | Slack app signing secret. |

## Events

| Event | Notes |
|-------|-------|
| `message.received` | Emitted for private `im` messages and channel `app_mention` events. Channel messages are mapped to group chats. |
| `platform.specific` | Reserved for Slack event types that are not converted into common message events. |

## Common APIs

Required:

- `send_message`
- `reply_message`

Optional:

- `get_message`
- `get_user_info`
- `get_friend_list`
- `get_group_info`
- `get_group_list`
- `get_group_member_list`
- `get_group_member_info`
- `call_platform_api`

Cache-backed APIs are only available after the relevant inbound event has been observed.

## Platform APIs

| Action | Notes |
|--------|-------|
| `get_mode` | Returns webhook mode and configured bot account id. |
| `auth_test` | Calls Slack `auth.test` with the configured bot token. |

## Known Limits

- Slack file/image outbound is currently represented as text fallback because the existing Slack SDK wrapper only exposes `chat_postMessage`.
- Inbound channel coverage follows the legacy adapter behavior: only `app_mention` events are treated as group messages.
- Real live testing requires a public callback URL configured in Slack Event Subscriptions.

## Verification

Local mocked unit coverage validates manifest parity, event conversion, legacy listener compatibility, cache-backed APIs, send/reply routing, and declared platform APIs.

Plugin E2E evidence was captured on June 2, 2026 against `dev.rockchin.top` with Slack private DM input and `EBAEventProbe` through the standalone runtime.

Evidence file: `/home/wgc/LangBotxg/LangBotEbaTest/data/temp/slack_eba_plugin_probe.jsonl`.

Observed:

- Real Slack private text produced `MessageReceived` with `adapter_name=slack-eba`, `Source + Plain`, private chat type, and filled `bot_uuid`.
- Safe common APIs passed: `get_message`, `get_user_info`, `get_friend_list`.
- Outbound component fallback sweep passed through `send_message`: plain/at/face, image, quote, file, and forward.
- Declared Slack platform APIs passed: `get_mode`, `auth_test`.

Still pending:

- Channel `app_mention` plugin E2E.
- Real inbound Slack file/image UI evidence.

Live probe scaffold: `tests/e2e/live_slack_eba_probe.py`.