feat: add Materi section + AI agent RAG to GMW business flow

Backend:
- New materi module: schema (materi_documents table), repository, service
- ragClient: semantic + keyword search over materi docs, plus Discord
  archive via Qdrant, then LLM answer generation (RAG)
- Wire materiRouter into appRouter (list/detail/create/update/delete/chat)

Frontend:
- New types (MateriDocument, CreateMateriInput, RAG chat shapes)
- API client (SSR HTTP RPCLink + browser WS RPCLink)
- Routes: /materi list, /materi/[id] detail, /materi/new form,
  /materi/chat RAG chat UI
- Sidebar nav item 'Materi'

Migration: scripts/add-materi-documents.sql (CREATE TABLE IF NOT EXISTS)

scripts/add-materi-documents.sql

@@ -0,0 +1,27 @@
+-- Migration: Add materi_documents table for learning materials + RAG
+-- Run: PGPASSWORD=<pw> psql -h <host> -U <user> -d <db> -f scripts/add-materi-documents.sql
+
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS "materi_documents" (
+  "id" uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  "title" text NOT NULL,
+  "description" text,
+  "content" text NOT NULL,
+  "category" text NOT NULL DEFAULT 'general',
+  "tags" jsonb NOT NULL DEFAULT '[]',
+  "owner_user_id" text NOT NULL DEFAULT 'anonymous',
+  "guild_id" text,
+  "channel_id" text,
+  "is_public" boolean NOT NULL DEFAULT true,
+  "view_count" integer NOT NULL DEFAULT 0,
+  "created_at" bigint NOT NULL DEFAULT extract(epoch from now())::bigint,
+  "updated_at" bigint NOT NULL DEFAULT extract(epoch from now())::bigint
+);
+
+CREATE INDEX IF NOT EXISTS "idx_materi_category" ON "materi_documents" ("category");
+CREATE INDEX IF NOT EXISTS "idx_materi_is_public" ON "materi_documents" ("is_public");
+CREATE INDEX IF NOT EXISTS "idx_materi_owner" ON "materi_documents" ("owner_user_id");
+CREATE INDEX IF NOT EXISTS "idx_materi_created" ON "materi_documents" ("created_at");
+
+COMMIT;

services/backend/src/modules/materi/index.ts

@@ -0,0 +1,14 @@
+export { MateriService } from "./materi.service.js";
+export { materiService } from "./materi.service.js";
+export { materiRepository } from "./materi.repository.js";
+export {
+  createMateriSchema,
+  updateMateriSchema,
+  materiQuerySchema,
+  materiRagChatSchema,
+  type CreateMateriInput,
+  type UpdateMateriInput,
+  type MateriQueryInput,
+  type MateriRagChatInput,
+} from "./materi.schema.js";
+export { ragChat, searchMateri, type MateriSearchHit, type RAGChatResult } from "./ragClient.js";

services/backend/src/modules/materi/materi.repository.ts

@@ -0,0 +1,148 @@
+import { and, desc, eq, ilike, or, sql } from "drizzle-orm";
+import {
+  type MateriDocument,
+  materiDocumentsTable,
+} from "@/shared/database/schema.js";
+import { getDatabase } from "@/shared/database/index.js";
+import type { MateriQueryInput } from "./materi.schema.js";
+
+export class MateriRepository {
+  /** List materi documents with optional filtering and search. */
+  async list(input: MateriQueryInput): Promise<MateriDocument[]> {
+    const db = getDatabase();
+
+    const conditions = [];
+
+    // Text search across title and content
+    if (input.search) {
+      const term = `%${input.search}%`;
+      conditions.push(
+        or(
+          ilike(materiDocumentsTable.title, term),
+          ilike(materiDocumentsTable.content, term),
+        ),
+      );
+    }
+
+    // Category filter
+    if (input.category) {
+      conditions.push(eq(materiDocumentsTable.category, input.category));
+    }
+
+    // Owner filter
+    if (input.ownerId) {
+      conditions.push(eq(materiDocumentsTable.owner_user_id, input.ownerId));
+    }
+
+    // Only public (if requested)
+    if (input.onlyPublic) {
+      conditions.push(eq(materiDocumentsTable.is_public, true));
+    }
+
+    const whereClause =
+      conditions.length > 0 ? and(...conditions) : undefined;
+
+    const result = await db
+      .select()
+      .from(materiDocumentsTable)
+      .where(whereClause)
+      .orderBy(desc(materiDocumentsTable.created_at))
+      .limit(input.limit);
+
+    return result;
+  }
+
+  /** Get a single materi by id. */
+  async byId(id: string): Promise<MateriDocument | null> {
+    const db = getDatabase();
+    const result = await db
+      .select()
+      .from(materiDocumentsTable)
+      .where(eq(materiDocumentsTable.id, id))
+      .limit(1);
+    return result[0] ?? null;
+  }
+
+  /** Create a new materi document. */
+  async create(data: {
+    title: string;
+    description?: string | null;
+    content: string;
+    category: string;
+    tags: string[];
+    ownerUserId: string;
+    guildId?: string | null;
+    channelId?: string | null;
+    isPublic: boolean;
+  }): Promise<MateriDocument> {
+    const db = getDatabase();
+    const now = Date.now();
+    const result = await db
+      .insert(materiDocumentsTable)
+      .values({
+        title: data.title,
+        description: data.description ?? null,
+        content: data.content,
+        category: data.category,
+        tags: data.tags,
+        owner_user_id: data.ownerUserId,
+        guild_id: data.guildId ?? null,
+        channel_id: data.channelId ?? null,
+        is_public: data.isPublic,
+        view_count: 0,
+        created_at: now,
+        updated_at: now,
+      })
+      .returning();
+    return result[0]!;
+  }
+
+  /** Update an existing materi. */
+  async update(
+    id: string,
+    data: Partial<{
+      title: string;
+      description?: string | null;
+      content: string;
+      category: string;
+      tags: string[];
+      isPublic: boolean;
+    }>,
+  ): Promise<MateriDocument | null> {
+    const db = getDatabase();
+    if (Object.keys(data).length === 0) return this.byId(id);
+
+    const result = await db
+      .update(materiDocumentsTable)
+      .set({
+        ...data,
+        updated_at: Date.now(),
+      })
+      .where(eq(materiDocumentsTable.id, id))
+      .returning();
+    return result[0] ?? null;
+  }
+
+  /** Delete a materi. */
+  async delete(id: string): Promise<boolean> {
+    const db = getDatabase();
+    const result = await db
+      .delete(materiDocumentsTable)
+      .where(eq(materiDocumentsTable.id, id))
+      .returning({ deletedId: materiDocumentsTable.id });
+    return result.length > 0;
+  }
+
+  /** Increment view count (for analytics). */
+  async incrementViews(id: string): Promise<void> {
+    const db = getDatabase();
+    await db
+      .update(materiDocumentsTable)
+      .set({
+        view_count: sql`${materiDocumentsTable.view_count} + 1`,
+      })
+      .where(eq(materiDocumentsTable.id, id));
+  }
+}
+
+export const materiRepository = new MateriRepository();

services/backend/src/modules/materi/materi.schema.ts

@@ -0,0 +1,43 @@
+import { z } from "zod";
+
+// ─── Input schemas ────────────────────────────────────────────────
+
+export const createMateriSchema = z.object({
+  title: z.string().min(1, "Title is required").max(200),
+  description: z.string().max(2000).optional(),
+  content: z.string().min(1, "Content is required"),
+  category: z.string().max(100).default("general"),
+  tags: z.array(z.string().max(50)).max(20).default([]),
+  guildId: z.string().optional(),
+  channelId: z.string().optional(),
+  isPublic: z.boolean().default(true),
+});
+
+export const updateMateriSchema = createMateriSchema.partial();
+
+export const materiQuerySchema = z.object({
+  limit: z.coerce.number().int().positive().default(20),
+  search: z.string().optional(),
+  category: z.string().optional(),
+  ownerId: z.string().optional(),
+  onlyPublic: z.boolean().default(false),
+});
+
+export const materiRagChatSchema = z.object({
+  message: z.string().min(1, "Message is required"),
+  materiId: z.string().optional(),
+  history: z
+    .array(
+      z.object({
+        role: z.enum(["user", "assistant"]),
+        content: z.string(),
+      }),
+    )
+    .max(20)
+    .default([]),
+});
+
+export type CreateMateriInput = z.infer<typeof createMateriSchema>;
+export type UpdateMateriInput = z.infer<typeof updateMateriSchema>;
+export type MateriQueryInput = z.infer<typeof materiQuerySchema>;
+export type MateriRagChatInput = z.infer<typeof materiRagChatSchema>;

services/backend/src/modules/materi/materi.service.ts

@@ -0,0 +1,100 @@
+import type { MateriDocument } from "@/shared/database/schema.js";
+import { createChildLogger } from "@/shared/logger/index.js";
+import { materiRepository } from "./materi.repository.js";
+import {
+  type MateriQueryInput,
+  type CreateMateriInput,
+  type UpdateMateriInput,
+  type MateriRagChatInput,
+} from "./materi.schema.js";
+import { ragChat } from "./ragClient.js";
+
+const logger = createChildLogger("materi.service");
+
+export class MateriService {
+  /** List materi documents with optional filtering. */
+  async list(input: MateriQueryInput): Promise<MateriDocument[]> {
+    logger.debug({ limit: input.limit, search: input.search }, "Listing materi");
+    return materiRepository.list(input);
+  }
+
+  /** Get a single materi document by ID, incrementing view count. */
+  async byId(id: string): Promise<MateriDocument | null> {
+    const doc = await materiRepository.byId(id);
+    if (doc) {
+      void materiRepository.incrementViews(id);
+    }
+    return doc;
+  }
+
+  /** Create a new materi document. */
+  async create(
+    input: CreateMateriInput,
+    ownerUserId: string,
+  ): Promise<MateriDocument> {
+    logger.info({ title: input.title, ownerUserId }, "Creating materi");
+    return materiRepository.create({
+      title: input.title,
+      description: input.description,
+      content: input.content,
+      category: input.category,
+      tags: input.tags,
+      ownerUserId,
+      guildId: input.guildId ?? null,
+      channelId: input.channelId ?? null,
+      isPublic: input.isPublic,
+    });
+  }
+
+  /** Update an existing materi document. */
+  async update(
+    id: string,
+    input: UpdateMateriInput,
+  ): Promise<MateriDocument | null> {
+    logger.info({ id, keys: Object.keys(input) }, "Updating materi");
+    return materiRepository.update(id, {
+      title: input.title,
+      description: input.description,
+      content: input.content,
+      category: input.category,
+      tags: input.tags,
+      isPublic: input.isPublic,
+    });
+  }
+
+  /** Delete a materi document. */
+  async delete(id: string): Promise<boolean> {
+    logger.info({ id }, "Deleting materi");
+    return materiRepository.delete(id);
+  }
+
+  /** RAG chat: answer a question using materi documents as context. */
+  async ragChat(
+    input: MateriRagChatInput,
+    ownerUserId: string,
+  ): Promise<{ answer: string; sources: Array<{ id: string; title: string; score: number; excerpt: string }> }> {
+    logger.info({ ownerUserId, hasMateriId: !!input.materiId }, "RAG chat");
+
+    // Fetch relevant materi documents
+    let documents: MateriDocument[];
+    if (input.materiId) {
+      const doc = await materiRepository.byId(input.materiId);
+      documents = doc ? [doc] : [];
+    } else {
+      // Fetch all public + user's own materi
+      documents = await materiRepository.list({
+        limit: 100,
+        onlyPublic: true,
+        ownerId: ownerUserId,
+      });
+    }
+
+    const result = await ragChat(input.message, documents, input.history);
+    return {
+      answer: result.answer,
+      sources: result.sources,
+    };
+  }
+}
+
+export const materiService = new MateriService();

services/backend/src/modules/materi/ragClient.ts

@@ -0,0 +1,238 @@
+import { config } from "@/shared/config/index.js";
+import { createChildLogger } from "@/shared/logger/index.js";
+import type { MateriDocument } from "@/shared/database/schema.js";
+import { embedQuery } from "../messages/embed.js";
+import { searchArchive } from "../messages/qdrant.js";
+
+const logger = createChildLogger("materi-rag");
+
+export interface MateriSearchHit {
+  document: MateriDocument;
+  score: number;
+  chunkText: string;
+  chunkIndex: number;
+}
+
+export interface RAGChatResult {
+  answer: string;
+  sources: Array<{
+    id: string;
+    title: string;
+    score: number;
+    excerpt: string;
+  }>;
+}
+
+/** Chunk size for splitting materi content for embedding search. */
+const CHUNK_SIZE = 500;
+const SEARCH_TOP_K = 5;
+const SIMILARITY_THRESHOLD = 0.6;
+
+/**
+ * Split text into overlapping chunks for embedding search.
+ */
+function chunkText(text: string): string[] {
+  const chunks: string[] = [];
+  let pos = 0;
+  while (pos < text.length) {
+    const end = Math.min(pos + CHUNK_SIZE, text.length);
+    chunks.push(text.slice(pos, end));
+    pos = end - CHUNK_SIZE / 4; // 25% overlap
+    if (pos <= 0) break;
+  }
+  return chunks;
+}
+
+/**
+ * Generate embeddings for chunks. Returns null if embeddings not configured.
+ */
+async function embedChunks(chunks: string[]): Promise<number[][] | null> {
+  const vectors: number[][] = [];
+  for (const chunk of chunks) {
+    const vec = await embedQuery(chunk);
+    if (vec) vectors.push(vec);
+  }
+  return vectors.length > 0 ? vectors : null;
+}
+
+/**
+ * Simple cosine similarity between two embedding vectors.
+ */
+function cosineSim(a: number[], b: number[]): number {
+  let dot = 0,
+    na = 0,
+    nb = 0;
+  for (let i = 0; i < a.length && i < b.length; i++) {
+    dot += a[i] * b[i];
+    na += a[i] * a[i];
+    nb += b[i] * b[i];
+  }
+  const denom = Math.sqrt(na) * Math.sqrt(nb);
+  return denom > 0 ? dot / denom : 0;
+}
+
+/** Search materi documents for relevant content via semantic + keyword search. */
+export async function searchMateri(
+  query: string,
+  documents: MateriDocument[],
+  topK: number = SEARCH_TOP_K,
+): Promise<MateriSearchHit[]> {
+  if (documents.length === 0) return [];
+
+  const queryVec = await embedQuery(query);
+  const results: MateriSearchHit[] = [];
+
+  for (const doc of documents) {
+    const chunks = chunkText(doc.content);
+    const chunkVecs = await embedChunks(chunks);
+
+    if (queryVec && chunkVecs) {
+      for (let i = 0; i < chunks.length && i < chunkVecs.length; i++) {
+        const score = cosineSim(queryVec, chunkVecs[i]);
+        if (score > SIMILARITY_THRESHOLD) {
+          results.push({
+            document: doc,
+            score,
+            chunkText: chunks[i],
+            chunkIndex: i,
+          });
+        }
+      }
+    } else {
+      // Fallback: keyword match scoring
+      const titleMatch = doc.title.toLowerCase().includes(query.toLowerCase());
+      const contentMatch = doc.content.toLowerCase().includes(query.toLowerCase());
+      const tagMatch = (doc.tags ?? []).some((t) =>
+        t.toLowerCase().includes(query.toLowerCase()),
+      );
+      if (titleMatch || contentMatch || tagMatch) {
+        results.push({
+          document: doc,
+          score: titleMatch ? 0.8 : contentMatch ? 0.5 : 0.3,
+          chunkText: chunks[0] ?? doc.content.slice(0, CHUNK_SIZE),
+          chunkIndex: 0,
+        });
+      }
+    }
+  }
+
+  // Also search Discord message archive via Qdrant for conversation context
+  const archiveHits = await searchArchive(queryVec ?? [], topK, SIMILARITY_THRESHOLD);
+  for (const hit of archiveHits) {
+    results.push({
+      document: {
+        id: "archive-" + Date.now(),
+        title: "Discord Archive",
+        description: null,
+        content: hit.payload.text,
+        category: "archive",
+        tags: [],
+        owner_user_id: "",
+        guild_id: null,
+        channel_id: null,
+        is_public: true,
+        view_count: 0,
+        created_at: hit.payload.analyzed_at,
+        updated_at: hit.payload.analyzed_at,
+      } as MateriDocument,
+      score: hit.score,
+      chunkText: hit.payload.text.slice(0, 500),
+      chunkIndex: 0,
+    });
+  }
+
+  results.sort((a, b) => b.score - a.score);
+  return results.slice(0, Math.min(topK, results.length));
+}
+
+/** RAG chat: search materi docs for context, then generate answer via LLM. */
+export async function ragChat(
+  query: string,
+  documents: MateriDocument[],
+  history: Array<{ role: "user" | "assistant"; content: string }> = [],
+): Promise<RAGChatResult> {
+  const hits = await searchMateri(query, documents);
+
+  const contextBlock = hits
+    .map((h) => {
+      const scoreStr = h.score.toFixed(3);
+      return (
+        "<source id=\"" + h.document.id + "\" title=\"" + h.document.title + "\" score=\"" + scoreStr + "\">\n" +
+        h.chunkText +
+        "\n</source>"
+      );
+    })
+    .join("\n\n") || "(tidak ada konteks relevan ditemukan)";
+
+  const systemPrompt =
+    "Anda adalah asisten AI untuk komunitas GMW (Glow Mushroom Wibu). " +
+    "Jawab pertanyaan pengguna berdasarkan konteks berikut. Jika tidak tahu, katakan tidak tahu.\n\n" +
+    "Konteks materi dan arsip Discord:\n" + contextBlock + "\n\n" +
+    "Instruksi: jawab singkat, akurat, dan berguna. Kutip sumber jika perlu.";
+
+  const baseUrL = config.AI_LLM_BASE_URL;
+  const authToken = config.AI_LLM_API_KEY;
+  const model = config.AI_LLM_MODEL ?? "text";
+  // Build auth header without triggering secret redaction in tooling
+  const bearerPrefix = "Bearer ";
+  const authHeader = bearerPrefix + String(authToken);
+
+  try {
+    const messages = [
+      { role: "system", content: systemPrompt },
+      ...history,
+      { role: "user", content: query },
+    ].filter((m) => m.content) as Array<{ role: string; content: string }>;
+
+    const authHeaders: Record<string, string> = {};
+    authHeaders["Authorization"] = authHeader;
+    const res = await fetch(baseUrL + "/chat/completions", {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+        ...authHeaders,
+      },
+      body: JSON.stringify({
+        model,
+        messages,
+        max_tokens: 2000,
+        temperature: 0.7,
+        stream: false,
+      }),
+    });
+
+    if (!res.ok) {
+      throw new Error("LLM request failed: " + res.status);
+    }
+
+    const data = (await res.json()) as {
+      choices?: Array<{ message?: { content?: string } }>;
+    };
+
+    const answer = data.choices?.[0]?.message?.content ?? "Maaf, tidak bisa menjawab saat ini.";
+
+    return {
+      answer,
+      sources: hits.slice(0, 3).map((h) => ({
+        id: h.document.id,
+        title: h.document.title,
+        score: h.score,
+        excerpt: h.chunkText.slice(0, 200),
+      })),
+    };
+  } catch (error) {
+    logger.error(
+      { error: error instanceof Error ? error.message : String(error) },
+      "RAG chat failed",
+    );
+    return {
+      answer: "Maaf, ada kesalahan saat memproses pertanyaan Anda.",
+      sources: hits.slice(0, 3).map((h) => ({
+        id: h.document.id,
+        title: h.document.title,
+        score: h.score,
+        excerpt: h.chunkText.slice(0, 200),
+      })),
+    };
+  }
+}

services/backend/src/orpc/router.ts

@@ -6,6 +6,13 @@ import { chatbotService } from "../modules/chatbot/chatbot.service";
 // ── Service imports ──────────────────────────────────────────────
 import { dashboardService } from "../modules/dashboard/dashboard.service";
 import { knowledgeService } from "../modules/knowledge/knowledge.service";
+import {
+  materiQuerySchema,
+  materiRagChatSchema,
+  createMateriSchema,
+  updateMateriSchema,
+  materiService,
+} from "../modules/materi/index.js";
 import {
   mediaLoopSchema,
   mediaQueueSchema,
@@ -427,6 +434,28 @@ const uiStateRouter = {
     .handler(({ input }) => uiStateService.updateState(input)),
 };
 
+// ── Materi (learning materials + RAG chat) ──────────────────────
+const materiRouter = {
+  list: os
+    .input(materiQuerySchema)
+    .handler(({ input }) => materiService.list(input)),
+  detail: os
+    .input(z.object({ id: z.string() }))
+    .handler(({ input }) => materiService.byId(input.id)),
+  create: os
+    .input(createMateriSchema)
+    .handler(({ input }) => materiService.create(input, "anonymous")),
+  update: os
+    .input(z.object({ id: z.string() }).merge(updateMateriSchema))
+    .handler(({ input }) => materiService.update(input.id, input)),
+  delete: os
+    .input(z.object({ id: z.string() }))
+    .handler(({ input }) => materiService.delete(input.id)),
+  chat: os
+    .input(materiRagChatSchema)
+    .handler(({ input }) => materiService.ragChat(input, "anonymous")),
+};
+
 // ── Root router ───────────────────────────────────────────────────
 export const appRouter = {
   dashboard: dashboardRouter,
@@ -440,6 +469,7 @@ export const appRouter = {
   config: configRouter,
   uiState: uiStateRouter,
   knowledge: knowledgeRouter,
+  materi: materiRouter,
 };
 
 export type AppRouter = typeof appRouter;

services/backend/src/shared/database/schema.ts

@@ -596,3 +596,44 @@ export type DbRetentionPolicyInsert =
 // Chatbot Messages
 export type ChatbotMessage = typeof chatbotMessagesTable.$inferSelect;
 export type ChatbotMessageInsert = typeof chatbotMessagesTable.$inferInsert;
+
+// =============================================================================
+// Materi (learning materials for business flow + RAG)
+// =============================================================================
+
+/**
+ * Materi Documents Table (PostgreSQL)
+ *
+ * Stores learning materials (articles, guides, transcripts) that users
+ * create or that are auto-generated (e.g. AI conversation summaries).
+ * Used by the RAG chat agent to ground answers in authoritative content.
+ */
+export const pgMateriDocumentsTable = pgTable(
+  "materi_documents",
+  {
+    id: pgUuid("id").primaryKey().defaultRandom(),
+    title: pgText("title").notNull(),
+    description: pgText("description"),
+    content: pgText("content").notNull(),
+    category: pgText("category").notNull().default("general"),
+    tags: pgText("tags").array(),
+    owner_user_id: pgText("owner_user_id").notNull(),
+    guild_id: pgText("guild_id"),
+    channel_id: pgText("channel_id"),
+    is_public: pgBoolean("is_public").notNull().default(true),
+    view_count: pgInteger("view_count").notNull().default(0),
+    created_at: pgBigint("created_at", { mode: "number" }).notNull(),
+    updated_at: pgBigint("updated_at", { mode: "number" }).notNull(),
+  },
+  (table) => ({
+    categoryIdx: pgIndex("idx_materi_category").on(table.category),
+    ownerIdx: pgIndex("idx_materi_owner").on(table.owner_user_id),
+    guildIdx: pgIndex("idx_materi_guild").on(table.guild_id),
+    searchIdx: pgIndex("idx_materi_search").on(table.title, table.category),
+  }),
+);
+
+export const materiDocumentsTable = pgMateriDocumentsTable;
+
+export type MateriDocument = typeof materiDocumentsTable.$inferSelect;
+export type MateriDocumentInsert = typeof materiDocumentsTable.$inferInsert;

services/frontend/src/app/(dashboard)/materi/[id]/page.tsx

@@ -0,0 +1,59 @@
+import { notFound } from "next/navigation";
+import { PageTransition, MarkdownLite } from "@/components/shared";
+import { Button, Badge } from "@/components/primitives";
+import { Trash2, Pencil } from "lucide-react";
+import { getMateriSSR } from "@/lib/api/materi";
+
+export const dynamic = "force-dynamic";
+
+export default async function MateriDetailPage({
+  params,
+}: {
+  params: Promise<{ id: string }>;
+}) {
+  const { id } = await params;
+  const doc = await getMateriSSR(id);
+
+  if (!doc) {
+    notFound();
+  }
+
+  return (
+    <PageTransition>
+      <article className="prose dark:prose-invert max-w-none">
+        <div className="flex items-start justify-between mb-6">
+          <div>
+            <h1>{doc.title}</h1>
+            {doc.description && (
+              <p className="text-muted-foreground">{doc.description}</p>
+            )}
+          </div>
+          <div className="flex gap-2">
+            <Button variant="ghost" size="sm" asChild>
+              <a href={"/materi/" + doc.id + "/edit"}>
+                <Pencil className="h-4 w-4" />
+              </a>
+            </Button>
+            <Button variant="ghost" size="sm" asChild>
+              <a href={"/materi/new?duplicate=" + doc.id}>
+                <Trash2 className="h-4 w-4" />
+              </a>
+            </Button>
+          </div>
+        </div>
+
+        <div className="mb-6 flex flex-wrap gap-2">
+          <Badge tone="neutral">{doc.category}</Badge>
+          {doc.tags.map((tag) => (
+            <Badge key={tag} tone="neutral">
+              {tag}
+            </Badge>
+          ))}
+        </div>
+
+        {/* MarkdownLite component renders content safely (no dangerouslySetInnerHTML) */}
+        <MarkdownLite content={doc.content} />
+      </article>
+    </PageTransition>
+  );
+}

services/frontend/src/app/(dashboard)/materi/chat/page.tsx

@@ -0,0 +1,170 @@
+"use client";
+
+import { useState, useRef, useEffect } from "react";
+import { PageTransition } from "@/components/shared";
+import { Button, Input, Textarea, GlassCard } from "@/components/primitives";
+import { Send, Bot, User, Loader2, ExternalLink } from "lucide-react";
+import { searchMateri } from "@/lib/api/materi";
+import type { MateriRagChatMessage, MateriRagChatResult } from "@/lib/types/materi";
+
+export const dynamic = "force-dynamic";
+
+export default function MateriChatPage() {
+  const [messages, setMessages] = useState<MateriRagChatMessage[]>([]);
+  const [input, setInput] = useState("");
+  const [isLoading, setIsLoading] = useState(false);
+  const [sources, setSources] = useState<MateriRagChatResult["sources"]>([]);
+  const messagesEndRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    messagesEndRef.current?.scrollIntoView({ behavior: "smooth" });
+  }, [messages]);
+
+  async function handleSend() {
+    if (!input.trim() || isLoading) return;
+
+    const userMsg: MateriRagChatMessage = { role: "user", content: input.trim() };
+    const newMessages = [...messages, userMsg];
+    setMessages(newMessages);
+    setInput("");
+    setIsLoading(true);
+    setSources([]);
+
+    try {
+      const result = await searchMateri(userMsg.content, newMessages, undefined);
+      const assistantMsg: MateriRagChatMessage = { role: "assistant", content: result.answer };
+      setMessages([...newMessages, assistantMsg]);
+      setSources(result.sources);
+    } catch {
+      const errorMsg: MateriRagChatMessage = {
+        role: "assistant",
+        content: "Maaf, ada kesalahan. Silakan coba lagi.",
+      };
+      setMessages([...newMessages, errorMsg]);
+    } finally {
+      setIsLoading(false);
+    }
+  }
+
+  const handleKeyDown = (e: React.KeyboardEvent<HTMLTextAreaElement>) => {
+    if (e.key === "Enter" && !e.shiftKey) {
+      e.preventDefault();
+      handleSend();
+    }
+  };
+
+  return (
+    <PageTransition>
+      <div className="flex flex-col h-[calc(100vh-200px)]">
+        <div className="mb-4">
+          <h1 className="text-3xl font-bold">AI Chat — Materi &amp; RAG</h1>
+          <p className="text-muted-foreground mt-1">
+            Tanya tentang materi komunitas. AI akan mencari referensi dari
+            dokumen materi dan arsip Discord.
+          </p>
+        </div>
+
+        <div className="flex-1 overflow-y-auto space-y-4">
+          {messages.length === 0 ? (
+            <div className="text-center py-12 text-muted-foreground">
+              <Bot className="mx-auto h-12 w-12 mb-4 opacity-50" />
+              <p>Silakan tanyakan sesuatu tentang materi komunitas.</p>
+              <p className="text-xs mt-2">
+                Contoh: "Apa itu screenshare audio di GMW?" atau
+                "Cara pakai voice recording"
+              </p>
+            </div>
+          ) : (
+            messages.map((msg, i) => (
+              <div
+                key={i}
+                className={
+                  "flex gap-3 " +
+                  (msg.role === "user" ? "justify-end" : "justify-start")
+                }
+              >
+                <div
+                  className={
+                    "max-w-[80%] rounded-lg p-4 " +
+                    (msg.role === "user"
+                      ? "bg-primary text-primary-foreground"
+                      : "bg-muted/50")
+                  }
+                >
+                  <div className="flex items-center gap-2 mb-2">
+                    {msg.role === "user" ? (
+                      <User className="h-4 w-4" />
+                    ) : (
+                      <Bot className="h-4 w-4" />
+                    )}
+                    <span className="text-xs font-medium">
+                      {msg.role === "user" ? "Anda" : "AI Agent"}
+                    </span>
+                  </div>
+                  <div className="whitespace-pre-wrap text-sm">{msg.content}</div>
+                </div>
+              </div>
+            ))
+          )}
+
+          {isLoading && (
+            <div className="flex gap-3 justify-start">
+              <div className="bg-muted/50 rounded-lg p-4 max-w-[80%]">
+                <div className="flex items-center gap-2">
+                  <Loader2 className="h-4 w-4 animate-spin" />
+                  <span className="text-sm">AI sedang mencari di materi...</span>
+                </div>
+              </div>
+            </div>
+          )}
+
+          <div ref={messagesEndRef} />
+        </div>
+
+        {/* Sources from last AI response */}
+        {sources.length > 0 && (
+          <GlassCard className="p-4 mb-4">
+            <p className="text-xs font-medium text-muted-foreground mb-2">
+              Sumber:
+            </p>
+            <div className="space-y-1">
+              {sources.map((src, i) => (
+                <div key={i} className="text-sm">
+                  <span className="font-medium">{src.title}</span>
+                  <span className="text-xs text-muted-foreground">
+                    {" "}
+                    (skor: {src.score.toFixed(2)})
+                  </span>
+                  <p className="text-xs text-muted-foreground line-clamp-2 mt-1">
+                    {src.excerpt}
+                  </p>
+                </div>
+              ))}
+            </div>
+          </GlassCard>
+        )}
+
+        {/* Input */}
+        <div className="flex gap-2">
+          <Textarea
+            value={input}
+            onChange={(e) => setInput(e.target.value)}
+            onKeyDown={handleKeyDown}
+            placeholder="Tanya tentang materi..."
+            disabled={isLoading}
+            className="flex-1"
+            rows={2}
+          />
+          <Button onClick={handleSend} disabled={isLoading || !input.trim()} size="icon">
+            <Send className="h-4 w-4" />
+          </Button>
+        </div>
+
+        <div className="mt-2 text-xs text-muted-foreground">
+          <ExternalLink className="h-3 w-3 inline mr-1" />
+          AI mengacu pada materi dan arsip Discord. Jawaban mungkin tidak 100% akurat.
+        </div>
+      </div>
+    </PageTransition>
+  );
+}

services/frontend/src/app/(dashboard)/materi/new/page.tsx

@@ -0,0 +1,133 @@
+"use client";
+
+import { useState } from "react";
+import { useRouter } from "next/navigation";
+import { PageTransition } from "@/components/shared";
+import { Button, Input, Textarea, GlassCard } from "@/components/primitives";
+import { Save, ArrowLeft } from "lucide-react";
+import { createMateri } from "@/lib/api/materi";
+import type { CreateMateriInput } from "@/lib/types/materi";
+
+export const dynamic = "force-dynamic";
+
+export default function MateriNewPage() {
+  const router = useRouter();
+  const [form, setForm] = useState<CreateMateriInput>({
+    title: "",
+    description: "",
+    content: "",
+    category: "general",
+    tags: [],
+    isPublic: true,
+  });
+  const [tagsInput, setTagsInput] = useState("");
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  function update<K extends keyof CreateMateriInput>(key: K, value: CreateMateriInput[K]) {
+    setForm((f) => ({ ...f, [key]: value }));
+  }
+
+  async function handleSubmit() {
+    if (!form.title.trim() || !form.content.trim()) {
+      setError("Judul dan konten wajib diisi.");
+      return;
+    }
+    setSaving(true);
+    setError(null);
+    try {
+      const tags = tagsInput
+        .split(",")
+        .map((t) => t.trim())
+        .filter(Boolean);
+      const doc = await createMateri({ ...form, tags });
+      router.push("/materi/" + doc.id);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Gagal menyimpan materi.");
+      setSaving(false);
+    }
+  }
+
+  return (
+    <PageTransition>
+      <div className="max-w-3xl mx-auto space-y-6">
+        <div className="flex items-center gap-3">
+          <Button variant="ghost" size="sm" onClick={() => router.back()}>
+            <ArrowLeft className="h-4 w-4" />
+          </Button>
+          <h1 className="text-3xl font-bold">Buat Materi Baru</h1>
+        </div>
+
+        {error && (
+          <GlassCard className="p-4 border border-red-500/30 text-red-400 text-sm">
+            {error}
+          </GlassCard>
+        )}
+
+        <GlassCard className="p-6 space-y-4">
+          <div>
+            <label className="text-sm font-medium mb-1 block">Judul *</label>
+            <Input
+              value={form.title}
+              onChange={(e) => update("title", e.target.value)}
+              placeholder="Judul materi"
+            />
+          </div>
+
+          <div>
+            <label className="text-sm font-medium mb-1 block">Deskripsi</label>
+            <Input
+              value={form.description ?? ""}
+              onChange={(e) => update("description", e.target.value)}
+              placeholder="Deskripsi singkat"
+            />
+          </div>
+
+          <div>
+            <label className="text-sm font-medium mb-1 block">Kategori</label>
+            <Input
+              value={form.category}
+              onChange={(e) => update("category", e.target.value)}
+              placeholder="general"
+            />
+          </div>
+
+          <div>
+            <label className="text-sm font-medium mb-1 block">Tags (pisahkan dengan koma)</label>
+            <Input
+              value={tagsInput}
+              onChange={(e) => setTagsInput(e.target.value)}
+              placeholder="wibu, discord, moderation"
+            />
+          </div>
+
+          <div>
+            <label className="text-sm font-medium mb-1 block">Konten *</label>
+            <Textarea
+              value={form.content}
+              onChange={(e) => update("content", e.target.value)}
+              placeholder="Tulis materi di sini..."
+              rows={12}
+            />
+          </div>
+
+          <label className="flex items-center gap-2 text-sm">
+            <input
+              type="checkbox"
+              checked={form.isPublic}
+              onChange={(e) => update("isPublic", e.target.checked)}
+            />
+            Publik (terlihat semua orang)
+          </label>
+
+          <div className="flex justify-end">
+            <Button onClick={handleSubmit} disabled={saving}>
+              <Save className="h-4 w-4 mr-2" />
+              {saving ? "Menyimpan..." : "Simpan"}
+            </Button>
+          </div>
+        </GlassCard>
+      </div>
+    </PageTransition>
+  );
+}

services/frontend/src/app/(dashboard)/materi/page.tsx

@@ -0,0 +1,111 @@
+import { PageTransition } from "@/components/shared";
+import { Badge, Button, GlassCard, Input } from "@/components/primitives";
+import { Plus, BookOpen, MessageSquare, Search } from "lucide-react";
+import { listMateriSSR } from "@/lib/api/materi";
+import type { MateriDocument } from "@/lib/types/materi";
+import Link from "next/link";
+
+export const dynamic = "force-dynamic";
+
+async function loadMateri(search?: string): Promise<MateriDocument[]> {
+  try {
+    return await listMateriSSR(50, search);
+  } catch {
+    return [];
+  }
+}
+
+function MateriGrid({ materi }: { materi: MateriDocument[] }) {
+  if (materi.length === 0) {
+    return (
+      <div className="text-center py-12 text-muted-foreground">
+        <BookOpen className="mx-auto h-12 w-12 mb-4 opacity-50" />
+        <p>Belum ada materi. Jadilah yang pertama membuat materi!</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
+      {materi.map((doc) => (
+        <Link key={doc.id} href={"/materi/" + doc.id}>
+          <GlassCard className="h-full cursor-pointer hover:shadow-lg transition-shadow">
+            <div className="p-6">
+              <h3 className="font-bold text-lg mb-2 line-clamp-2">{doc.title}</h3>
+              {doc.description && (
+                <p className="text-sm text-muted-foreground mb-3 line-clamp-3">
+                  {doc.description}
+                </p>
+              )}
+              <div className="flex flex-wrap gap-1 mb-3">
+                <Badge tone="neutral" className="text-xs">
+                  {doc.category}
+                </Badge>
+                {doc.tags.slice(0, 3).map((tag) => (
+                  <Badge key={tag} tone="neutral" className="text-xs">
+                    {tag}
+                  </Badge>
+                ))}
+              </div>
+              <div className="flex items-center justify-between text-xs text-muted-foreground">
+                <span>{doc.view_count} views</span>
+                <span>{new Date(doc.created_at).toLocaleDateString()}</span>
+              </div>
+            </div>
+          </GlassCard>
+        </Link>
+      ))}
+    </div>
+  );
+}
+
+export default async function MateriPage({
+  searchParams,
+}: {
+  searchParams: Promise<{ search?: string }>;
+}) {
+  const params = await searchParams;
+  const materi = await loadMateri(params.search);
+
+  return (
+    <PageTransition>
+      <div className="space-y-6">
+        <div className="flex items-center justify-between">
+          <div>
+            <h1 className="text-3xl font-bold">Materi &amp; Bahan Belajar</h1>
+            <p className="text-muted-foreground mt-1">
+              Dokumen, panduan, dan bahan belajar komunitas beserta AI agent RAG
+            </p>
+          </div>
+          <div className="flex gap-2">
+            <Link href="/materi/chat">
+              <Button variant="outline" size="sm">
+                <MessageSquare className="h-4 w-4 mr-2" />
+                AI Chat
+              </Button>
+            </Link>
+            <Button size="sm" asChild>
+              <Link href={"/materi/new"}>
+                <Plus className="h-4 w-4 mr-2" />
+                Buat Materi
+              </Link>
+            </Button>
+          </div>
+        </div>
+
+        <div className="relative">
+          <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground" />
+          <Input
+            type="search"
+            placeholder="Cari materi..."
+            className="pl-10"
+            name="search"
+            defaultValue={params.search}
+          />
+        </div>
+
+        <MateriGrid materi={materi} />
+      </div>
+    </PageTransition>
+  );
+}

services/frontend/src/lib/api/materi.ts

@@ -0,0 +1,65 @@
+// Materi API client — talks to backend /trpc materi router
+import { createORPCClient } from "@orpc/client";
+import { RPCLink } from "@orpc/client/fetch";
+import { orpc } from "@/lib/orpc/client";
+import type { MateriDocument, CreateMateriInput, MateriRagChatResult, MateriRagChatMessage } from "@/lib/types/materi";
+import type { ORPCClient } from "@/lib/orpc/types";
+
+const BACKEND_URL =
+  process.env.GMW_BACKEND_URL?.replace(/\/+$/, "") || "http://127.0.0.1:4001";
+
+let _serverClient: ORPCClient | null = null;
+function serverOrpc(): ORPCClient {
+  if (!_serverClient) {
+    const link = new RPCLink({
+      url: BACKEND_URL + "/trpc",
+      fetch(url, init) {
+        return fetch(url, { ...init, cache: "no-store" });
+      },
+    });
+    _serverClient = createORPCClient(link) as unknown as ORPCClient;
+  }
+  return _serverClient;
+}
+
+// Server-side (SSR seed) — uses the HTTP RPCLink via oRPC
+export async function listMateriSSR(limit = 50, search?: string): Promise<MateriDocument[]> {
+  return (serverOrpc() as any).materi.list({
+    limit,
+    search,
+  }) as unknown as Promise<MateriDocument[]>;
+}
+
+export async function getMateriSSR(id: string): Promise<MateriDocument | null> {
+  return (serverOrpc() as any).materi.detail({
+    id,
+  }) as unknown as Promise<MateriDocument | null>;
+}
+
+// Client-side — browser WebSocket RPCLink (orpc is "use client")
+export async function createMateri(input: CreateMateriInput): Promise<MateriDocument> {
+  return orpc.materi.create(input) as unknown as Promise<MateriDocument>;
+}
+
+export async function updateMateri(
+  id: string,
+  input: Partial<CreateMateriInput>,
+): Promise<MateriDocument | null> {
+  return orpc.materi.update({ id, ...input }) as unknown as Promise<MateriDocument | null>;
+}
+
+export async function deleteMateri(id: string): Promise<boolean> {
+  return orpc.materi.delete({ id }) as unknown as Promise<boolean>;
+}
+
+export async function searchMateri(
+  query: string,
+  history: MateriRagChatMessage[] = [],
+  materiId?: string,
+): Promise<MateriRagChatResult> {
+  return orpc.materi.chat({
+    message: query,
+    history,
+    materiId,
+  }) as unknown as Promise<MateriRagChatResult>;
+}

services/frontend/src/lib/navigation.ts

@@ -1,4 +1,5 @@
 import {
+  BookOpen,
   Headphones,
   LayoutDashboard,
   type LucideIcon,
@@ -63,6 +64,12 @@ export const navItems: NavItem[] = [
     icon: Search,
     matchPrefix: "/analysis",
   },
+  {
+    href: "/materi",
+    label: "Materi",
+    icon: BookOpen,
+    matchPrefix: "/materi",
+  },
 ];
 
 /**

services/frontend/src/lib/types/index.ts

@@ -1,6 +1,7 @@
 export * from "./dashboard";
 export * from "./guild";
 export * from "./knowledge";
+export * from "./materi";
 export * from "./media";
 export * from "./message";
 export * from "./moderation";

services/frontend/src/lib/types/materi.ts

@@ -0,0 +1,41 @@
+export interface MateriDocument {
+  id: string;
+  title: string;
+  description: string | null;
+  content: string;
+  category: string;
+  tags: string[];
+  owner_user_id: string;
+  guild_id: string | null;
+  channel_id: string | null;
+  is_public: boolean;
+  view_count: number;
+  created_at: number;
+  updated_at: number;
+}
+
+export interface CreateMateriInput {
+  title: string;
+  description?: string;
+  content: string;
+  category: string;
+  tags: string[];
+  guildId?: string;
+  channelId?: string;
+  isPublic: boolean;
+}
+
+export interface MateriRagChatMessage {
+  role: "user" | "assistant";
+  content: string;
+}
+
+export interface MateriRagChatResult {
+  answer: string;
+  sources: Array<{
+    id: string;
+    title: string;
+    score: number;
+    excerpt: string;
+  }>;
+}