Include last 30 Discord messages as agent context.

This gathers the most recent thread messages (including bot messages) and passes them to the prompt agent so replies can use conversation history instead of only the latest message.

Author: andrelandgraf

app/src/lib/discord/prompt-agent.ts

@@ -8,6 +8,13 @@ import { createGateway, generateText, tool } from "ai";
 import { z } from "zod";
 
 const DISCORD_AGENT_MODEL = "anthropic/claude-sonnet-4.6";
+const MAX_CONTEXT_MESSAGE_LENGTH = 500;
+
+type RecentDiscordMessage = {
+  author: string;
+  text: string;
+  isBot: boolean;
+};
 
 const updateEventInputSchema = z.object({
   slug: z.string().min(1),
@@ -188,12 +195,27 @@ function buildTools() {
 
 export async function runDiscordPromptAgent(input: {
   prompt: string;
+  recentMessages?: RecentDiscordMessage[];
 }): Promise<string> {
   const prompt = input.prompt.trim();
   if (!prompt) {
     return "Please provide a prompt.";
   }
 
+  const contextText =
+    input.recentMessages && input.recentMessages.length > 0
+      ? `Recent Discord messages (oldest to newest):\n${input.recentMessages
+          .map((message) => {
+            const role = message.isBot ? "bot" : "user";
+            const text = message.text
+              .replace(/\s+/g, " ")
+              .trim()
+              .slice(0, MAX_CONTEXT_MESSAGE_LENGTH);
+            return `- [${role}] ${message.author}: ${text}`;
+          })
+          .join("\n")}\n\nLatest user prompt:\n${prompt}`
+      : prompt;
+
   const { text } = await generateText({
     model: getGatewayModel(),
     tools: buildTools(),
@@ -203,7 +225,7 @@ Use tools whenever the answer depends on current data.
 Before updating event data, confirm intent from the user message and summarize what changed.
 If user intent is ambiguous, ask a clarifying question instead of calling update tools.
 Be concise and action-oriented.`,
-    prompt,
+    prompt: contextText,
   });
 
   return text.trim();

app/src/lib/discord/review-bot.tsx

@@ -27,6 +27,12 @@ type ReviewCardInput = {
   isDraft: boolean;
 };
 
+type RecentMessageContext = {
+  author: string;
+  text: string;
+  isBot: boolean;
+};
+
 let reviewBot: Chat<{
   discord: ReturnType<typeof createDiscordAdapter>;
 }> | null = null;
@@ -114,8 +120,29 @@ function registerHandlers(
 
     try {
       await thread.startTyping();
+      const recentMessages: RecentMessageContext[] = [];
+      for await (const recentMessage of thread.messages) {
+        const text = recentMessage.text?.trim();
+        if (!text) {
+          continue;
+        }
+        recentMessages.push({
+          author:
+            recentMessage.author.fullName ||
+            recentMessage.author.userName ||
+            recentMessage.author.userId,
+          text,
+          isBot: recentMessage.author.isBot,
+        });
+        if (recentMessages.length >= 30) {
+          break;
+        }
+      }
+      recentMessages.reverse();
+
       const response = await runDiscordPromptAgent({
         prompt: userPrompt.slice(0, 4000),
+        recentMessages,
       });
       await thread.post(response || "I couldn't generate a response.");
     } catch (error) {