feat(course): 30 compiler-graded chapters + glossary + cleanup

- 30 chapters (e02-e12, i01-i10, a01-a09) authored in 简体中文 + 日本語, each
  example backed by a verified Typed English snippet. 184 snippets total — all
  type-check against the library AND resolve to their exact English sentence
  (pnpm verify:snippets). Covers be, tenses, modals, comparison, infinitives,
  gerunds, clauses, passive, conditionals, reported speech, participles.
- Glossary now covers every course word (pnpm verify:vocab); verify-vocab counts
  inflected forms; added verify-chapter.mjs (scoped, parallel-safe grader).
- Cleared stale Japanese Eval benchmark rounds so none ship; Eval tab degrades
  to an empty state. Build: 74 prerendered zh/ja pages, 0 typed-japanese refs.
- Library README + project metadata.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Yifeng Evan Wang

README.md

@@ -1 +1,63 @@
-# Typed English
+# Typed English 📖
+
+**Type-level English grammar.** Every constructor evaluates to the real surface
+string *at the type level*, so an English sentence written as a TypeScript type
+*resolves* to exactly the English it spells out — and the compiler checks it.
+
+```ts
+import type { ConjugateVerb, Go, Sentence, DeterminerPart, NounPart, VerbPart, PunctuationPart } from "typed-english";
+
+type Went = ConjugateVerb<Go, "Past">; // ⇒ "went"
+
+type S = Sentence<[
+  DeterminerPart<"the">,
+  NounPart<"dog">,
+  VerbPart<{ base: "run"; past: "ran" }, "Past">,
+  PunctuationPart<".">,
+]>; // ⇒ "The dog ran."
+```
+
+If you conjugate a verb wrong, the spelling won't match and TypeScript tells you.
+Grammar stops being something you memorize and becomes something the type checker
+verifies. This is the sibling of
+[Typed Japanese](https://github.com/typedgrammar/typed-japanese) and
+[Typed Korean](https://github.com/typedgrammar/typed-korean), for English.
+
+## The library (`src/`)
+
+| File | What it models |
+| --- | --- |
+| `verb-types.d.ts` | `ConjugateVerb<V, Form>` — base / 3rd-person / past / past participle / gerund / infinitive, with regular orthography (`-s`, `-es`, `-ies`, `-ed`, `-ing`) computed at the type level and overrides for irregulars. |
+| `noun-types.d.ts` | Pluralization, the Saxon genitive, and the pronoun classes. |
+| `adjective-types.d.ts` | Degrees of comparison (`-er` / `-est`, plus `more` / `most`). |
+| `adverb-types.d.ts` | `Adverbialize` (quick → quickly) and closed adverb classes. |
+| `function-word-types.d.ts` | Articles, determiners, prepositions, conjunctions, auxiliaries, modals. |
+| `phrase-types.d.ts` | The `Part` system + `Sentence<[...]>` — joins parts with spaces (gluing punctuation and the `'s` clitic), then capitalizes. |
+
+## The playground (`playground/`)
+
+An interactive site — bilingual (**简体中文 / 日本語**) — with four parts:
+
+- **📚 Grammar Course** — chapters from elementary to advanced; every example
+  sentence is a verified Typed English snippet you can open in the analyzer.
+- **🏛 Foundations** — short articles on the *architecture* of English, framed
+  as a type system.
+- **🔤 Glossary** — every word the course uses, with part of speech and meaning.
+- **🧪 Playground** — write an English sentence as a TypeScript type and watch
+  the compiler resolve and visualize its structure (real Monaco + TS in-browser).
+
+```bash
+cd playground
+pnpm install
+pnpm dev             # Vite dev server
+pnpm build           # type-check + production build + SSR prerender to dist/
+pnpm verify:snippets # every course snippet type-checks AND resolves to its sentence
+pnpm verify:vocab    # every course word is indexed in the glossary
+```
+
+Deployed to GitHub Pages from `playground/dist` (see
+`.github/workflows/deploy-playground.yml`).
+
+## License
+
+MIT

package.json

@@ -9,9 +9,7 @@
     "typecheck": "tsc --noEmit",
     "build": "tsc",
     "lint": "eslint . --ext .ts,.tsx",
-    "test": "pnpm typecheck && pnpm lint && pnpm run-examples",
-    "run-examples": "node --loader ts-node/esm src/examples/basic.ts",
-    "examples": "node --loader ts-node/esm src/examples/basic.ts"
+    "test": "pnpm typecheck && pnpm lint"
   },
   "keywords": [
     "typescript",