feat: repo foundation and course tooling

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tools/test/start-module.test.mjs

@@ -0,0 +1,47 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { existsSync, mkdirSync, writeFileSync } from "node:fs";
+import { join } from "node:path";
+import { run, copyFixture, fixtures } from "./helpers.mjs";
+
+const env = { COURSE_ROOT: join(fixtures, "course") };
+
+test("start_module_copies_tests", () => {
+  const ws = copyFixture("ws-start");
+  const r = run("start-module.mjs", ["01", ws], env);
+  assert.equal(r.code, 0, r.out);
+  assert.ok(existsSync(join(ws, "tests/m01.rs")));
+  assert.match(r.out, /newGame, summon, play/);
+});
+
+test("start_module_uses_track", () => {
+  const ws = copyFixture("ws-start-ts");
+  assert.equal(run("start-module.mjs", ["01", ws], env).code, 0);
+  assert.ok(existsSync(join(ws, "tests/m01.test.ts")));
+  assert.ok(!existsSync(join(ws, "tests/m01.rs")));
+});
+
+test("start_module_accepts_when_previous_present", () => {
+  const ws = copyFixture("ws-start");
+  mkdirSync(join(ws, "tests"), { recursive: true });
+  writeFileSync(join(ws, "tests/m02.rs"), "");
+  const r = run("start-module.mjs", ["03", ws], env);
+  assert.equal(r.code, 0, r.out);
+  assert.ok(existsSync(join(ws, "tests/m03.rs")));
+});
+
+test("start_module_refuses_skipping", () => {
+  const ws = copyFixture("ws-start");
+  writeFileSync(join(ws, "tests/m01.rs"), "");
+  const r = run("start-module.mjs", ["03", ws], env);
+  assert.equal(r.code, 1);
+  assert.match(r.out, /finish module 02 first/);
+  assert.ok(!existsSync(join(ws, "tests/m03.rs")));
+});
+
+test("start_module_00_not_startable", () => {
+  const ws = copyFixture("ws-start");
+  const r = run("start-module.mjs", ["00", ws], env);
+  assert.notEqual(r.code, 0);
+  assert.match(r.out, /naive-engine/);
+});