lessons: L1 build-along — workspace + Reth + Malachite (Stages 1-3)

First hands-on lesson of the build-along course. Reader writes the
workspace skeleton from scratch (Stage 1), then pins Reth and
Malachite as workspace deps (Stage 2+3).

L1 structure (the build-along template):
  - Goal: cargo check --workspace passes
  - Recap: what L0 setup gave you (~/code/my-openhl + reference)
  - Plan: 3 stages, each with a test gate
  - Walk-through: 9 numbered steps with full TOML/Rust to type
  - Test: cargo check + cargo build --bin openhl
  - Design reflection: 2 load-bearing decisions
    (workspace-level deps; SHA-pinned git deps)
  - Answer key: diff against psyto/openhl@5fc7ca1
  - Common questions: 4 FAQs (git commits, warnings, disk, parallelism)
  - Next lesson: preview of L2 (openhl-types)

Generator updates:
  - Module 1 (Foundations) added to both EN and JA configs
  - L1 LessonSpec in both locales
  - COURSE_SHARED duration: 20→65, xpReward: 60→140

Pilot state: course now shows 2 lessons (L0 + L1) / 2 modules /
65 min / 140 XP. L2-L14 still pending, drafted incrementally after
L1 format approved.

Verified locally — both L0 and L1 render correctly at:
  - http://localhost:3000/courses/reth-openhl-consensus-ja
  - .../lessons/openhl-workspace-ja

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: psyto

.github/scripts/build-openhl-seed.ts

@@ -73,6 +73,7 @@ const EN: LocaleConfig = {
   },
   modules: {
     0: { title: 'Orientation', sortOrder: 0 },
+    1: { title: 'Foundations', sortOrder: 1 },
   },
   lessons: [
     {
@@ -86,6 +87,17 @@ const EN: LocaleConfig = {
       h1Marker: '# Build OpenHL — from `cargo init` to a single-validator devnet',
       startSignature: 'This is not a course you read. This is a course you **build**.',
     },
+    {
+      draftFile: 'openhl_l1_en.md',
+      moduleNumber: 1,
+      sortOrder: 0,
+      title: 'Lesson 1 — Workspace + Reth + Malachite (Stages 1-3)',
+      slug: 'openhl-workspace-en',
+      duration: 45,
+      xpReward: 80,
+      h1Marker: '# Lesson 1 — Workspace + Reth + Malachite (Stages 1-3)',
+      startSignature: 'By the end of this lesson, run from your `~/code/my-openhl/` directory:',
+    },
   ],
 };
 
@@ -106,6 +118,7 @@ const JA: LocaleConfig = {
   },
   modules: {
     0: { title: 'Orientation', sortOrder: 0 },
+    1: { title: 'Foundations', sortOrder: 1 },
   },
   lessons: [
     {
@@ -119,6 +132,17 @@ const JA: LocaleConfig = {
       h1Marker: '# OpenHL を自作する — `cargo init` から動く single-validator devnet まで',
       startSignature: 'これは「読む」コースではない。これは「**作る**」コースだ。',
     },
+    {
+      draftFile: 'openhl_l1_ja.md',
+      moduleNumber: 1,
+      sortOrder: 0,
+      title: 'レッスン 1 — Workspace + Reth + Malachite (Stages 1-3)',
+      slug: 'openhl-workspace-ja',
+      duration: 45,
+      xpReward: 80,
+      h1Marker: '# レッスン 1 — Workspace + Reth + Malachite (Stages 1-3)',
+      startSignature: 'このレッスンの終わりに、`~/code/my-openhl/` ディレクトリで次を実行する:',
+    },
   ],
 };
 
@@ -140,8 +164,8 @@ interface Lesson {
 
 const COURSE_SHARED = {
   difficulty: 'EXPERT' as const,
-  duration: 20, // L0 only (build-along pilot)
-  xpReward: 60, // L0 only (build-along pilot)
+  duration: 65, // L0 (20) + L1 (45) — build-along pilot
+  xpReward: 140, // L0 (60) + L1 (80) — build-along pilot
   tags: ['reth', 'malachite', 'bft', 'evm', 'clob', 'l1', 'openhl', 'expert'],
   sortOrder: 600,
   isPublished: false,