diff --git a/src/config/types.slack.ts b/src/config/types.slack.ts
index 96abe2641d6..a90f1ed5020 100644
--- a/src/config/types.slack.ts
+++ b/src/config/types.slack.ts
@@ -47,6 +47,11 @@ export type SlackChannelConfig = {
 export type SlackReactionNotificationMode = "off" | "own" | "all" | "allowlist";
 export type SlackStreamingMode = "off" | "partial" | "block" | "progress";
 export type SlackLegacyStreamMode = "replace" | "status_final" | "append";
+export type SlackCapabilitiesConfig =
+  | string[]
+  | {
+      interactiveReplies?: boolean;
+    };
 
 export type SlackActionConfig = {
   reactions?: boolean;
@@ -89,7 +94,7 @@ export type SlackAccountConfig = {
   /** Slack Events API webhook path (default: /slack/events). */
   webhookPath?: string;
   /** Optional provider capability tags used for agent/runtime guidance. */
-  capabilities?: string[];
+  capabilities?: SlackCapabilitiesConfig;
   /** Markdown formatting overrides (tables). */
   markdown?: MarkdownConfig;
   /** Override native command registration for Slack (bool or "auto"). */