refactor: share reaction schemas and notes

docs/providers/discord.md

@@ -33,8 +33,7 @@ Status: ready for DM and guild text channels via the official Discord bot gatewa
     - Full command list + config: [Slash commands](/tools/slash-commands)
 11. Optional guild context history: set `discord.historyLimit` (default 20) to include the last N guild messages as context when replying to a mention. Set `0` to disable.
 12. Reactions: the agent can trigger reactions via the `discord` tool (gated by `discord.actions.*`).
-    - `emoji=""` removes the bot's reaction(s) on the message.
-    - `remove: true` removes the specific emoji reaction.
+    - Reaction removal semantics: see [/tools/reactions](/tools/reactions).
     - The `discord` tool is only exposed when the current provider is Discord.
 13. Native commands use isolated session keys (`discord:slash:${userId}`) rather than the shared `main` session.
 

docs/providers/slack.md

@@ -222,5 +222,5 @@ Slack tool actions can be gated with `slack.actions.*`:
 ## Notes
 - Mention gating is controlled via `slack.channels` (set `requireMention` to `true`); `routing.groupChat.mentionPatterns` also count as mentions.
 - Reaction notifications follow `slack.reactionNotifications` (use `reactionAllowlist` with mode `allowlist`).
-- For the Slack tool, `emoji=""` removes the bot's reaction(s) on the message; `remove: true` removes a specific emoji reaction.
+- For the Slack tool, reaction removal semantics are in [/tools/reactions](/tools/reactions).
 - Attachments are downloaded to the media store when permitted and under the size limit.

docs/providers/telegram.md

@@ -71,8 +71,7 @@ Controlled by `telegram.replyToMode`:
 
 ## Agent tool (reactions)
 - Tool: `telegram` with `react` action (`chatId`, `messageId`, `emoji`).
-- `emoji=""` removes the bot's reaction(s) on the message.
-- `remove: true` removes the reaction (Telegram only supports removing your own reaction).
+- Reaction removal semantics: see [/tools/reactions](/tools/reactions).
 - Tool gating: `telegram.actions.reactions` (default: enabled).
 
 ## Delivery targets (CLI/cron)

docs/providers/whatsapp.md

@@ -97,8 +97,7 @@ WhatsApp requires a real mobile number for verification. VoIP and virtual number
 ## Agent tool (reactions)
 - Tool: `whatsapp` with `react` action (`chatJid`, `messageId`, `emoji`, optional `remove`).
 - Optional: `participant` (group sender), `fromMe` (reacting to your own message), `accountId` (multi-account).
-- `emoji=""` removes the bot's reaction(s) on the message.
-- `remove: true` removes the bot's reaction (same effect as empty emoji).
+- Reaction removal semantics: see [/tools/reactions](/tools/reactions).
 - Tool gating: `whatsapp.actions.reactions` (default: enabled).
 
 ## Outbound send (text + media)