feat(platform): add slack eba adapter

docs/event-based-agents/adapters/00-index.md

@@ -24,6 +24,7 @@ Current acceptance report: [EBA Adapter Acceptance Report](./acceptance-report.m
 | WeComBot | Migrated; private text and outbound/API plugin E2E verified, feedback/group gaps remain | [WeComBot](./wecombot.md) |
 | Official Account | Migrated; private text plugin E2E verified, proactive outbound not supported | [Official Account](./officialaccount.md) |
 | QQ Official API | Migrated; WebSocket inbound reached LangBot, model config blocked reply | [QQ Official API](./qqofficial.md) |
+| Slack | Migrated; private text and outbound/API plugin E2E verified | [Slack](./slack.md) |
 
 ## Documentation Checklist
 

docs/event-based-agents/adapters/acceptance-report.md

@@ -14,6 +14,7 @@ Scope:
 - `wecomcs-eba`
 - `officialaccount-eba`
 - `qqofficial-eba`
+- `slack-eba`
 
 This report follows `acceptance-checklist.md`. Evidence levels are intentionally strict:
 
@@ -38,6 +39,7 @@ This report follows `acceptance-checklist.md`. Evidence levels are intentionally
 | WeCom Customer Service | Partial EBA acceptance | WeCom Customer Service is split into the EBA directory with manifest, converters, API mixin, platform API map, unit tests, docs, and a direct live probe scaffold. Real WeChat customer-side UI text reached `EBAEventProbe`; plugin outbound text/image and safe cache-backed common APIs passed. Inbound media and platform-specific API live coverage remain pending; later fallback text sends were blocked by WeCom `95001 send msg count limit`. |
 | Official Account | Partial EBA acceptance | WeChat Official Account is split into the EBA directory with manifest, converters, cache-backed safe APIs, platform API map, unit tests, and a direct live probe scaffold. Real WeChat Official Account UI private text reached `EBAEventProbe`; safe cache-backed common APIs and declared platform APIs passed. Proactive outbound `send_message` is not supported because replies must be tied to inbound webhook windows; inbound image/voice live UI evidence remains pending. |
 | QQ Official API | Partial EBA acceptance | QQ Official API is split into the EBA directory with manifest, converters, cache-backed safe APIs, platform API map, unit tests, docs, and a direct live probe scaffold. A real WebSocket-mode QQ Official bot reached the LangBot pipeline on `dev.rockchin.top`; reply/outbound evidence is blocked by the test model provider returning `model_not_found` for `deepseek-v3`. |
+| Slack | Partial EBA acceptance | Slack is split into the EBA directory with manifest, converters, cache-backed safe APIs, platform API map, unit tests, docs, and a direct live probe scaffold. Real Slack private text reached `EBAEventProbe`; safe common APIs, outbound component fallback sweep, and declared Slack platform APIs passed. Channel mention and real inbound media evidence remain pending. |
 
 Telegram and DingTalk now have real user-side UI image/file upload evidence in plugin JSONL. Discord and aiocqhttp do not yet have real UI inbound image/file evidence.
 
@@ -58,6 +60,8 @@ Telegram and DingTalk now have real user-side UI image/file upload evidence in p
 | WeCom Customer Service | WeChat customer-side UI, `客服消息 -> 浪波智能客服` on `dev.rockchin.top` | `/home/wgc/LangBotxg/LangBotEbaTest/data/temp/wecomcs_eba_plugin_probe.jsonl` |
 | Official Account | WeChat desktop client, subscribed Official Account on `dev.rockchin.top` | `/home/wgc/LangBotxg/LangBotEbaTest/data/temp/officialaccount_eba_plugin_probe.jsonl` |
 | QQ Official API unit | local mocked QQ Official client paths | `tests/unit_tests/platform/test_qqofficial_eba_adapter.py` |
+| Slack unit | local mocked Slack client paths | `tests/unit_tests/platform/test_slack_eba_adapter.py` |
+| Slack private | Slack workspace private DM on `dev.rockchin.top` | `/home/wgc/LangBotxg/LangBotEbaTest/data/temp/slack_eba_plugin_probe.jsonl` |
 
 All plugin runs used SDK standalone runtime ports `5400/5401`, LangBot `--standalone-runtime`, and the real plugin at `langbot-plugin-demo/EBAEventProbe`.
 

docs/event-based-agents/adapters/slack.md

@@ -0,0 +1,84 @@
+# 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`.