diff --git a/package.json b/package.json
index 2f33a1b..09b9243 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,8 @@
   "type": "module",
   "workspaces": [
     "theme",
-    "bot"
+    "bot",
+    "web"
   ],
   "scripts": {
     "build": "npm run build --workspace theme",
@@ -16,6 +17,11 @@
     "bot:typecheck": "npm run typecheck -w bot",
     "bot:dev": "npm run dev -w bot",
     "bot:deploy": "npm run deploy -w bot",
-    "bot:commands": "npm run commands -w bot"
+    "bot:commands": "npm run commands -w bot",
+    "web:test": "npm test -w web",
+    "web:typecheck": "npm run typecheck -w web",
+    "web:dev": "npm run dev -w web",
+    "web:build": "npm run build -w web",
+    "web:capture": "npm run capture -w web"
   }
 }
diff --git a/web/index.html b/web/index.html
new file mode 100644
index 0000000..7336934
--- /dev/null
+++ b/web/index.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover">
+  <title>araharah</title>
+</head>
+<body>
+  <div id="app"></div>
+  <script type="module" src="/src/main.ts"></script>
+</body>
+</html>
diff --git a/web/package.json b/web/package.json
new file mode 100644
index 0000000..5d8f052
--- /dev/null
+++ b/web/package.json
@@ -0,0 +1,21 @@
+{
+  "name": "@araharah/web",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "test": "node test/runner.mjs",
+    "typecheck": "tsc --noEmit",
+    "dev": "vite",
+    "build": "vite build",
+    "capture": "node scripts/capture.mjs"
+  },
+  "dependencies": {
+    "maplibre-gl": "^6.15.0",
+    "@araharah/theme": "*"
+  },
+  "devDependencies": {
+    "vite": "^8.3.5",
+    "typescript": "^5.9.3",
+    "playwright": "^1.50.0"
+  }
+}
diff --git a/web/src/main.ts b/web/src/main.ts
new file mode 100644
index 0000000..686efa1
--- /dev/null
+++ b/web/src/main.ts
@@ -0,0 +1,10 @@
+/*
+ * main.ts — the Mini App entry module (D-01, D-02, D-11).
+ * --------------------------------------------------------
+ * The one-and-only DOM entry: web/index.html loads it as `type="module"`
+ * into `<div id="app">`. This plan (03-01) scaffolds the workspace; the
+ * Telegram WebApp binding behind the narrow TelegramWebAppLike interface
+ * and the map shell mount here in plans 03-02 and 03-03. Kept
+ * dependency-free until those plans introduce their modules.
+ */
+export {};
diff --git a/web/test/harness.mjs b/web/test/harness.mjs
new file mode 100644
index 0000000..bebcfdc
--- /dev/null
+++ b/web/test/harness.mjs
@@ -0,0 +1,10 @@
+/*
+ * harness.mjs — zero-dependency test registry (D-12).
+ * Suites import { test } and register async cases; runner.mjs drains the registry.
+ * Same hand-rolled shape as theme/scripts/audit.test.mjs (Phase 1 precedent).
+ */
+const tests = [];
+export function test(name, fn) {
+  tests.push({ name, fn });
+}
+export const registry = tests;
diff --git a/web/test/runner.mjs b/web/test/runner.mjs
new file mode 100644
index 0000000..333fe2f
--- /dev/null
+++ b/web/test/runner.mjs
@@ -0,0 +1,47 @@
+#!/usr/bin/env node
+/*
+ * runner.mjs — hand-rolled zero-dependency test runner (D-02, D-11).
+ *
+ * Auto-discovers *.test.mjs in this directory (sorted), dynamic-imports
+ * them, and drains the harness registry. A suite that fails to LOAD is
+ * recorded as one failing case — the run never crashes mid-way.
+ * Same hand-rolled shape as theme/scripts/audit.test.mjs (Phase 1)
+ * and bot/test/ (Phase 2) — copied verbatim, workspace-agnostic.
+ */
+import { readdirSync } from "node:fs";
+import { registry } from "./harness.mjs";
+
+const dir = import.meta.dirname;
+const suites = readdirSync(dir)
+  .filter((f) => f.endsWith(".test.mjs"))
+  .sort();
+
+for (const file of suites) {
+  try {
+    await import(`./${file}`);
+  } catch (loadErr) {
+    registry.push({
+      name: `suite load failed: ${file}`,
+      fn: () => {
+        throw loadErr;
+      },
+    });
+  }
+}
+
+let passedCount = 0;
+let failedCount = 0;
+for (const { name, fn } of registry) {
+  try {
+    await fn();
+    passedCount++;
+    console.log(`PASS ${name}`);
+  } catch (err) {
+    failedCount++;
+    console.log(`FAIL ${name}`);
+    console.error(`  ${err && err.stack ? err.stack : String(err)}`);
+  }
+}
+
+console.log(`[runner] ${passedCount} passed, ${failedCount} failed`);
+process.exitCode = failedCount > 0 ? 1 : 0;
diff --git a/web/tsconfig.json b/web/tsconfig.json
new file mode 100644
index 0000000..44e869e
--- /dev/null
+++ b/web/tsconfig.json
@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "target": "ES2023",
+    "lib": ["ES2023", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "types": ["vite/client"],
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "verbatimModuleSyntax": true,
+    "allowImportingTsExtensions": true,
+    "noEmit": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true
+  },
+  "include": ["src"]
+}
diff --git a/web/vite.config.ts b/web/vite.config.ts
new file mode 100644
index 0000000..65f294e
--- /dev/null
+++ b/web/vite.config.ts
@@ -0,0 +1,14 @@
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  base: "/",
+  build: {
+    outDir: "dist",
+    emptyOutDir: true,
+    target: "es2022",
+  },
+  server: {
+    port: 5173,
+    strictPort: true,
+  },
+});