diff --git a/README.md b/README.md
new file mode 100644
index 0000000..eef107d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,10 @@
+# 範疇
+## Category learning
+
+### TODO
+Use SCOWL project for English
+categorize every word!!
+
+
+important: Frequency
+
diff --git a/data/data.db b/data/data.db
index bdc0326..041c4f2 100644
Binary files a/data/data.db and b/data/data.db differ
diff --git a/data/data.db-shm b/data/data.db-shm
new file mode 100644
index 0000000..fe9ac28
Binary files /dev/null and b/data/data.db-shm differ
diff --git a/data/data.db-wal b/data/data.db-wal
new file mode 100644
index 0000000..e69de29
diff --git a/data/schema.sql b/data/schema.sql
index 8678b7e..210c59a 100644
--- a/data/schema.sql
+++ b/data/schema.sql
@@ -1,5 +1,9 @@
 -- Enable foreign key support
 PRAGMA foreign_keys = ON;
+PRAGMA journal_mode = WAL;
+PRAGMA cache_size = -2000;
+PRAGMA mmap_size = 30000000000;
+
 
 -- Words table
 CREATE TABLE words (
@@ -7,8 +11,12 @@ CREATE TABLE words (
     spelling TEXT NOT NULL,
     ipa      TEXT NOT NULL,
     language_id INTEGER NOT NULL,
+    frequency INTEGER,
     FOREIGN KEY (language_id) REFERENCES languages(id)
 );
+CREATE INDEX idx_words_spelling ON words(spelling);
+CREATE INDEX idx_words_language_id ON words(language_id);
+
 
 -- Languages table
 CREATE TABLE languages (
@@ -29,14 +37,18 @@ CREATE TABLE categories (
     part_of_speech_id INTEGER NOT NULL,
     FOREIGN KEY (part_of_speech_id) REFERENCES parts_of_speech(id)
 );
+CREATE INDEX idx_categories_name ON categories(name);
+CREATE INDEX idx_categories_part_of_speech_id ON categories(part_of_speech_id);
 
 -- Word Categories junction table
 CREATE TABLE word_categories (
     word_id INTEGER NOT NULL,
     category_id INTEGER NOT NULL,
     PRIMARY KEY (word_id, category_id),
-    FOREIGN KEY (word_id) REFERENCES words(id)
+    FOREIGN KEY (word_id) REFERENCES words(id),
+    FOREIGN KEY (category_id) REFERENCES categories(id)
 );
+CREATE INDEX idx_word_categories_category_id ON word_categories(category_id);
 
 -- Example data insertion
 INSERT INTO languages (name) VALUES ('en-us');
@@ -58,6 +70,7 @@ INSERT INTO categories (name, part_of_speech_id) VALUES
 ('intransitive', 2),
 ('action', 2),
 ('mental', 2),
+('auxiliar', 2),
 ('preposition', 6),
 ('postposition', 6),
 ('circumposition', 6);
@@ -83,3 +96,72 @@ SELECT
     id 
 FROM categories 
 WHERE name IN ('intransitive', 'mental');
+
+-- multi word stuff
+CREATE TABLE idioms(
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    text TEXT NOT NULL,
+    language_id INTEGER NOT NULL,
+    frequency INTEGER,
+    FOREIGN KEY (language_id) REFERENCES languages(id)
+);
+CREATE TABLE idioms_words(
+    idiom_id INTEGER NOT NULL,
+    word_id INTEGER NOT NULL,
+    PRIMARY KEY (idiom_id, word_id),
+    FOREIGN KEY (word_id) REFERENCES words(id),
+    FOREIGN KEY (idiom_id) REFERENCES idioms(id)
+);
+
+-- phrasal verbs, other sui generis stuff
+CREATE TABLE expressions(
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    text TEXT NOT NULL,
+    type TEXT NOT NULL, -- phrasal-verb, result-complement etc.
+    language_id INTEGER NOT NULL,
+    FOREIGN KEY (language_id) REFERENCES languages(id)
+);
+CREATE TABLE expression_words(
+    expression_id INTEGER NOT NULL,
+    word_id INTEGER NOT NULL,
+    PRIMARY KEY (expression_id, word_id),
+    FOREIGN KEY (expression_id) REFERENCES expressions(id),
+    FOREIGN KEY (word_id) REFERENCES words(id)
+);
+
+
+-- Progress
+CREATE TABLE users(
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL,
+    creds TEXT NOT NULL
+);
+CREATE TABLE attempts(
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id INTEGER NOT NULL,
+    timestamp INTEGER NOT NULL,
+    resource_id INTEGER NOT NULL,
+    resources_type TEXT NOT NULL, -- name of the table, words, expressions, lessons etc.
+    good INTEGER NOT NULL, -- 0 or 1
+    FOREIGN KEY (user_id) REFERENCES users(id)
+);
+
+-- Index to query attempts on a specific resource
+CREATE INDEX idx_attempts_resource ON attempts(resource_id, resources_type);
+
+-- Index to query attempts for a specific user
+CREATE INDEX idx_attempts_user ON attempts(user_id);
+
+-- (Optional) Index to query attempts by user and resource (useful if you often query by both)
+CREATE INDEX idx_attempts_user_resource ON attempts(user_id, resource_id, resources_type);
+-- Lessons
+CREATE TABLE lessons(
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    text TEXT NOT NULL
+);
+CREATE TABLE lessons_resources(
+  resource_id INTEGER NOT NULL,
+  resources_type TEXT NOT NULL, -- name of the table, words, expressions etc.
+  lesson_id INTEGER NOT NULL,
+  FOREIGN KEY (lesson_id) REFERENCES lessons(id)
+);
diff --git a/devenv.nix b/devenv.nix
index f3613c2..a87445a 100644
--- a/devenv.nix
+++ b/devenv.nix
@@ -11,12 +11,18 @@
   # https://devenv.sh/packages/
   packages = with pkgs; [
     sqlite
+    nodePackages.typescript-language-server
+    nodePackages.prettier
   ];
 
   # https://devenv.sh/languages/
   # languages.rust.enable = true;
   languages = {
     elm.enable = true;
+    javascript = {
+      enable = true;
+      bun.enable = true;
+    };
   };
 
   # https://devenv.sh/processes/
diff --git a/server/.gitignore b/server/.gitignore
new file mode 100644
index 0000000..9b1ee42
--- /dev/null
+++ b/server/.gitignore
@@ -0,0 +1,175 @@
+# Based on https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
+
+# Logs
+
+logs
+_.log
+npm-debug.log_
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Caches
+
+.cache
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# Runtime data
+
+pids
+_.pid
+_.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+
+lib-cov
+
+# Coverage directory used by tools like istanbul
+
+coverage
+*.lcov
+
+# nyc test coverage
+
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+
+bower_components
+
+# node-waf configuration
+
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+
+build/Release
+
+# Dependency directories
+
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+
+web_modules/
+
+# TypeScript cache
+
+*.tsbuildinfo
+
+# Optional npm cache directory
+
+.npm
+
+# Optional eslint cache
+
+.eslintcache
+
+# Optional stylelint cache
+
+.stylelintcache
+
+# Microbundle cache
+
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+
+.node_repl_history
+
+# Output of 'npm pack'
+
+*.tgz
+
+# Yarn Integrity file
+
+.yarn-integrity
+
+# dotenv environment variable files
+
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+
+.parcel-cache
+
+# Next.js build output
+
+.next
+out
+
+# Nuxt.js build / generate output
+
+.nuxt
+dist
+
+# Gatsby files
+
+# Comment in the public line in if your project uses Gatsby and not Next.js
+
+# https://nextjs.org/blog/next-9-1#public-directory-support
+
+# public
+
+# vuepress build output
+
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+
+.temp
+
+# Docusaurus cache and generated files
+
+.docusaurus
+
+# Serverless directories
+
+.serverless/
+
+# FuseBox cache
+
+.fusebox/
+
+# DynamoDB Local files
+
+.dynamodb/
+
+# TernJS port file
+
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+
+.vscode-test
+
+# yarn v2
+
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store
diff --git a/server/.prettierrc.json b/server/.prettierrc.json
new file mode 100644
index 0000000..0a11aaf
--- /dev/null
+++ b/server/.prettierrc.json
@@ -0,0 +1,6 @@
+{
+    "trailingComma": "all",
+    "tabWidth": 2,
+    "semi": true,
+    "singleQuote": true
+}
diff --git a/server/README.md b/server/README.md
new file mode 100644
index 0000000..4847ee5
--- /dev/null
+++ b/server/README.md
@@ -0,0 +1,15 @@
+# server
+
+To install dependencies:
+
+```bash
+bun install
+```
+
+To run:
+
+```bash
+bun run index.ts
+```
+
+This project was created using `bun init` in bun v1.1.2. [Bun](https://bun.sh) is a fast all-in-one JavaScript runtime.
diff --git a/server/bun.lockb b/server/bun.lockb
new file mode 100755
index 0000000..1b40428
Binary files /dev/null and b/server/bun.lockb differ
diff --git a/server/package.json b/server/package.json
new file mode 100644
index 0000000..deb94fd
--- /dev/null
+++ b/server/package.json
@@ -0,0 +1,11 @@
+{
+  "name": "server",
+  "module": "server.ts",
+  "type": "module",
+  "devDependencies": {
+    "@types/bun": "latest"
+  },
+  "peerDependencies": {
+    "typescript": "^5.0.0"
+  }
+}
diff --git a/server/server.ts b/server/server.ts
new file mode 100644
index 0000000..6be80ad
--- /dev/null
+++ b/server/server.ts
@@ -0,0 +1,74 @@
+import { Database } from 'bun:sqlite';
+
+const db = new Database('../data/data.db');
+db.exec('PRAGMA journal_mode = WAL;');
+
+Bun.serve({
+  fetch(req) {
+    console.log('req object', req);
+    const url = new URL(req.url);
+    if (url.pathname === '/') return new Response('Home page!');
+    if (req.method === 'POST' && url.pathname === '/api')
+      return handlePost(req, url);
+    if (req.method === 'GET' && url.pathname.startsWith('/api'))
+      return handleGet(req, url);
+    return new Response('404!');
+  },
+});
+
+async function handleGet(_req: Request, url: URL) {
+  if (url.pathname === '/api/resource') return handleGetResource(url);
+  else return new Response('huh');
+}
+function handleGetResource(url: URL) {
+  const params = new URLSearchParams(url.search);
+  console.log(params);
+  const type = params.get('type');
+  const resource = params.get('res');
+  const data = fetchResource(type!, resource!);
+  return Response.json({ ok: true, data });
+}
+
+async function handlePost(req: Request, url: URL) {
+  const data = await req.json();
+  if (url.pathname === '/api/user') return handlePostUser(data);
+  else return new Response('huh');
+}
+// https://bun.sh/guides/http/server
+type PostUser = { name: string; creds: string };
+function handlePostUser(user: PostUser) {
+  addUser(user.name, user.creds);
+  return new Response('ok');
+}
+
+function addUser(name: string, creds: string) {
+  const query = db.query(`
+    INSERT 
+    INTO users(name, creds) 
+    VALUES($name, $creds)
+  `);
+  query.run({ $name: name, $creds: creds });
+}
+
+function fetchResource(type: string, resource: string) {
+  if (type === 'word') return fetchWord(resource);
+  else return {};
+}
+function fetchWord(word: string) {
+  const query = db.query(`
+    SELECT 
+      spelling,
+      ipa,
+      languages.name AS language,
+      GROUP_CONCAT(c.name, ',') AS category,
+      ps.name AS pos
+    FROM words
+    JOIN languages ON languages.id = words.language_id
+    JOIN word_categories wc ON words.id = wc.word_id
+    JOIN categories c ON wc.category_id = c.id
+    JOIN parts_of_speech ps ON ps.id = c.part_of_speech_id
+    WHERE spelling = $spelling
+    GROUP BY words.id
+    `);
+  return query.get({ $spelling: word });
+}
diff --git a/server/tsconfig.json b/server/tsconfig.json
new file mode 100644
index 0000000..238655f
--- /dev/null
+++ b/server/tsconfig.json
@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    // Enable latest features
+    "lib": ["ESNext", "DOM"],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  }
+}