feat(slack): add SLACK_LIST_DMS tool and sender name in DMs

slack-mcp/server/lib/types.ts

@@ -141,6 +141,7 @@ export interface SlackChannel {
   is_member: boolean;
   created: number;
   creator: string;
+  user?: string;
   topic?: {
     value: string;
     creator: string;

slack-mcp/server/slack/handlers/eventHandler.ts

@@ -17,6 +17,7 @@ import {
   addReaction,
   removeReaction,
   deleteMessage,
+  getUserInfo,
 } from "../../lib/slack-client.ts";
 import type {
   SlackEvent,
@@ -845,8 +846,29 @@ async function handleDirectMessage(
     await removeReaction(channel, ts, "eyes");
   }
 
+  // Resolve sender name so the LLM knows who it's talking to
+  let senderText = text;
+  try {
+    const userInfo = await getUserInfo(user);
+    const senderName = userInfo
+      ? userInfo.profile?.display_name || userInfo.real_name || userInfo.name
+      : null;
+    if (senderName) {
+      senderText = `[Mensagem de ${senderName}]\n${text}`;
+      console.log(`[EventHandler] DM sender resolved: ${senderName}`);
+    }
+  } catch (err) {
+    console.warn(`[EventHandler] Failed to resolve DM sender name:`, err);
+  }
+
   console.log(`[EventHandler] Building LLM messages for DM...`);
-  const messages = await buildLLMMessages(channel, text, ts, undefined, media);
+  const messages = await buildLLMMessages(
+    channel,
+    senderText,
+    ts,
+    undefined,
+    media,
+  );
   console.log(`[EventHandler] LLM messages built: ${messages.length} messages`);
   messages.forEach((msg, i) => {
     console.log(

slack-mcp/server/tools/channels.ts

@@ -14,6 +14,7 @@ import {
   getChannelMembers,
   openDM,
   inviteToChannel,
+  getUserInfo,
 } from "../lib/slack-client.ts";
 
 /**
@@ -98,6 +99,80 @@ export const createListChannelsTool = (_env: Env) =>
     },
   });
 
+/**
+ * List all direct message conversations
+ */
+export const createListDMsTool = (_env: Env) =>
+  createTool({
+    id: "SLACK_LIST_DMS",
+    description:
+      "List all direct message conversations the bot has. Returns channel IDs that can be used with SLACK_GET_CHANNEL_HISTORY to read DM messages.",
+    annotations: { readOnlyHint: true },
+    inputSchema: z
+      .object({
+        limit: z
+          .number()
+          .optional()
+          .default(100)
+          .describe("Maximum number of DMs to return"),
+      })
+      .strict(),
+    outputSchema: z
+      .object({
+        success: z.boolean(),
+        dms: z.array(
+          z.object({
+            channel_id: z.string(),
+            user_id: z.string(),
+            user_name: z.string(),
+          }),
+        ),
+        error: z.string().optional(),
+      })
+      .strict(),
+    execute: async ({ context }: { context: unknown }) => {
+      const input = context as { limit?: number };
+
+      try {
+        const channels = await listChannels({
+          types: "im",
+          limit: input.limit,
+          skipCache: true,
+        });
+
+        const imChannels = channels.filter((c) => c.is_im && c.user);
+
+        const dms = await Promise.all(
+          imChannels.map(async (c) => {
+            const userInfo = await getUserInfo(c.user!);
+            const userName = userInfo
+              ? userInfo.profile?.display_name ||
+                userInfo.real_name ||
+                userInfo.name
+              : "(unknown user)";
+
+            return {
+              channel_id: c.id,
+              user_id: c.user!,
+              user_name: userName,
+            };
+          }),
+        );
+
+        return {
+          success: true,
+          dms,
+        };
+      } catch (error) {
+        return {
+          success: false,
+          dms: [],
+          error: error instanceof Error ? error.message : String(error),
+        };
+      }
+    },
+  });
+
 /**
  * Get channel info
  */
@@ -356,6 +431,7 @@ export const createInviteToChannelTool = (_env: Env) =>
  */
 export const channelTools = [
   createListChannelsTool,
+  createListDMsTool,
   createGetChannelInfoTool,
   createJoinChannelTool,
   createGetChannelMembersTool,

slack-mcp/tsconfig.json

@@ -21,13 +21,6 @@
     "noUnusedParameters": false,
     "noFallthroughCasesInSwitch": true,
     "noUncheckedSideEffectImports": true,
-    /* Path Aliases */
-    "baseUrl": ".",
-    "paths": {
-      "server/*": [
-        "./server/*"
-      ]
-    },
     /* Types */
     "types": [
       "@types/node"