From fe778e81f9cfa0a8c12dee9700656b16f1b755bc Mon Sep 17 00:00:00 2001
From: Matt Keenan <github@mattkeenan.net>
Date: Fri, 30 Jan 2026 15:06:56 +0000
Subject: [PATCH] feat: add actions.sendMessage gating to Discord, Slack,
 Google Chat, Matrix (#4703)

Enables read-only mode for these channels by adding actions.sendMessage
configuration option. When set to false, blocks outbound messages while
still allowing message reception.

Follows the existing Telegram/WhatsApp pattern:
- Add sendMessage?: boolean to channel ActionConfig types
- Check gate in action handler, throw error if disabled
- Default: true (enabled) when not specified

This brings read-only mode support to 6 out of 7 core channels
(Telegram, WhatsApp, Discord, Slack, Google Chat, Matrix).
---
 extensions/googlechat/src/actions.ts          | 5 +++++
 extensions/matrix/src/actions.ts              | 5 +++++
 extensions/matrix/src/config-schema.ts        | 1 +
 src/agents/tools/discord-actions-messaging.ts | 4 ++--
 src/agents/tools/slack-actions.ts             | 3 +++
 src/config/types.discord.ts                   | 1 +
 src/config/types.googlechat.ts                | 1 +
 src/config/types.slack.ts                     | 1 +
 8 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/extensions/googlechat/src/actions.ts b/extensions/googlechat/src/actions.ts
index cecce7b14..02e7f4ef8 100644
--- a/extensions/googlechat/src/actions.ts
+++ b/extensions/googlechat/src/actions.ts
@@ -77,6 +77,11 @@ export const googlechatMessageActions: ChannelMessageActionAdapter = {
     }
 
     if (action === "send") {
+      const actionConfig = account.config.actions ?? (cfg as OpenClawConfig).channels?.["googlechat"]?.actions;
+      const isActionEnabled = createActionGate(actionConfig as Record<string, boolean | undefined>);
+      if (!isActionEnabled("sendMessage")) {
+        throw new Error("Google Chat sendMessage is disabled.");
+      }
       const to = readStringParam(params, "to", { required: true });
       const content = readStringParam(params, "message", {
         required: true,
diff --git a/extensions/matrix/src/actions.ts b/extensions/matrix/src/actions.ts
index 113680a3b..de65ae2eb 100644
--- a/extensions/matrix/src/actions.ts
+++ b/extensions/matrix/src/actions.ts
@@ -51,6 +51,11 @@ export const matrixMessageActions: ChannelMessageActionAdapter = {
       readStringParam(params, "to", { required: true });
 
     if (action === "send") {
+      const account = resolveMatrixAccount({ cfg: cfg as CoreConfig });
+      const isActionEnabled = createActionGate((cfg as CoreConfig).channels?.matrix?.actions);
+      if (!isActionEnabled("sendMessage")) {
+        throw new Error("Matrix sendMessage is disabled.");
+      }
       const to = readStringParam(params, "to", { required: true });
       const content = readStringParam(params, "message", {
         required: true,
diff --git a/extensions/matrix/src/config-schema.ts b/extensions/matrix/src/config-schema.ts
index 5d08fc73b..d17e6de2a 100644
--- a/extensions/matrix/src/config-schema.ts
+++ b/extensions/matrix/src/config-schema.ts
@@ -6,6 +6,7 @@ const allowFromEntry = z.union([z.string(), z.number()]);
 const matrixActionSchema = z
   .object({
     reactions: z.boolean().optional(),
+    sendMessage: z.boolean().optional(),
     messages: z.boolean().optional(),
     pins: z.boolean().optional(),
     memberInfo: z.boolean().optional(),
diff --git a/src/agents/tools/discord-actions-messaging.ts b/src/agents/tools/discord-actions-messaging.ts
index f90fb60de..ae8f48800 100644
--- a/src/agents/tools/discord-actions-messaging.ts
+++ b/src/agents/tools/discord-actions-messaging.ts
@@ -222,8 +222,8 @@ export async function handleDiscordMessagingAction(
       });
     }
     case "sendMessage": {
-      if (!isActionEnabled("messages")) {
-        throw new Error("Discord message sends are disabled.");
+      if (!isActionEnabled("sendMessage")) {
+        throw new Error("Discord sendMessage is disabled.");
       }
       const to = readStringParam(params, "to", { required: true });
       const content = readStringParam(params, "content", {
diff --git a/src/agents/tools/slack-actions.ts b/src/agents/tools/slack-actions.ts
index 3bb8ea717..bdb40df1d 100644
--- a/src/agents/tools/slack-actions.ts
+++ b/src/agents/tools/slack-actions.ts
@@ -154,6 +154,9 @@ export async function handleSlackAction(
     }
     switch (action) {
       case "sendMessage": {
+        if (!isActionEnabled("sendMessage")) {
+          throw new Error("Slack sendMessage is disabled.");
+        }
         const to = readStringParam(params, "to", { required: true });
         const content = readStringParam(params, "content", { required: true });
         const mediaUrl = readStringParam(params, "mediaUrl");
diff --git a/src/config/types.discord.ts b/src/config/types.discord.ts
index 07d4e658f..742890517 100644
--- a/src/config/types.discord.ts
+++ b/src/config/types.discord.ts
@@ -55,6 +55,7 @@ export type DiscordGuildEntry = {
 
 export type DiscordActionConfig = {
   reactions?: boolean;
+  sendMessage?: boolean;
   stickers?: boolean;
   polls?: boolean;
   permissions?: boolean;
diff --git a/src/config/types.googlechat.ts b/src/config/types.googlechat.ts
index 5fceff49e..5cd46f751 100644
--- a/src/config/types.googlechat.ts
+++ b/src/config/types.googlechat.ts
@@ -30,6 +30,7 @@ export type GoogleChatGroupConfig = {
 
 export type GoogleChatActionConfig = {
   reactions?: boolean;
+  sendMessage?: boolean;
 };
 
 export type GoogleChatAccountConfig = {
diff --git a/src/config/types.slack.ts b/src/config/types.slack.ts
index cbf912e80..d05e09886 100644
--- a/src/config/types.slack.ts
+++ b/src/config/types.slack.ts
@@ -48,6 +48,7 @@ export type SlackReactionNotificationMode = "off" | "own" | "all" | "allowlist";
 
 export type SlackActionConfig = {
   reactions?: boolean;
+  sendMessage?: boolean;
   messages?: boolean;
   pins?: boolean;
   search?: boolean;