feat(course-format): stcourse.yaml schema

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

packages/course-format/test/schema.test.ts

@@ -0,0 +1,51 @@
+import { describe, expect, test } from "bun:test";
+import { parseManifest } from "../src/schema";
+
+const base = (extra = "", lessons = "      - { id: l1, title: One, type: text, file: a.md }") =>
+  `schema: 1\nid: x\ntitle: X\n${extra}modules:\n  - id: m1\n    title: M\n    lessons:\n${lessons}\n`;
+
+describe("parseManifest", () => {
+  test("parses a minimal manifest", () => {
+    const r = parseManifest(base());
+    expect(r.ok).toBe(true);
+    if (r.ok) {
+      expect(r.manifest.visibility).toBe("restricted");
+      expect(r.manifest.gating).toBe("none");
+    }
+  });
+
+  test("rejects a bad accent", () => {
+    const r = parseManifest(base('accent: "orange"\n'));
+    expect(r.ok).toBe(false);
+    if (!r.ok) expect(r.errors.some((e) => e.includes("accent"))).toBe(true);
+  });
+
+  test("rejects duplicate lesson ids across modules", () => {
+    const text = base() + "  - id: m2\n    title: M2\n    lessons:\n      - { id: l1, title: Dup, type: text, file: b.md }\n";
+    const r = parseManifest(text);
+    expect(r.ok).toBe(false);
+    if (!r.ok) expect(r.errors.some((e) => e.includes("l1"))).toBe(true);
+  });
+
+  test("requires file for text and video lessons", () => {
+    for (const type of ["text", "video"]) {
+      const r = parseManifest(base("", `      - { id: l1, title: One, type: ${type} }`));
+      expect(r.ok).toBe(false);
+      if (!r.ok) expect(r.errors.some((e) => e.includes("file"))).toBe(true);
+    }
+    expect(parseManifest(base("", "      - { id: l1, title: One, type: exercise }")).ok).toBe(true);
+  });
+
+  test("rejects a deck whose attachTo is not a lesson or module id", () => {
+    const r = parseManifest(base("decks:\n  - { id: d1, file: d.pdf, attachTo: nope }\n"));
+    expect(r.ok).toBe(false);
+    if (!r.ok) expect(r.errors.some((e) => e.includes("nope"))).toBe(true);
+    expect(parseManifest(base("decks:\n  - { id: d1, file: d.pdf, attachTo: m1 }\n")).ok).toBe(true);
+  });
+
+  test("rejects schema: 2", () => {
+    const r = parseManifest(base().replace("schema: 1", "schema: 2"));
+    expect(r.ok).toBe(false);
+    if (!r.ok) expect(r.errors.some((e) => e.startsWith("schema"))).toBe(true);
+  });
+});