Fix js-yaml named imports

Author: Copilot

lib/lesson-discovery.ts

@@ -1,7 +1,7 @@
 import { readdir, readFile } from "node:fs/promises";
 import { existsSync } from "node:fs";
 import { join } from "node:path";
-import yaml from "js-yaml";
+import { load } from "js-yaml";
 import {
   moduleFileSchema,
   parseOrderedName,
@@ -67,7 +67,7 @@ export async function discoverLessons(): Promise<LessonEntry[]> {
       throw new Error(`${modDir.name}: missing module.yaml`);
     }
     const moduleFile = moduleFileSchema.parse(
-      yaml.load(await readFile(moduleYamlPath, "utf8")),
+      load(await readFile(moduleYamlPath, "utf8")),
     );
     const moduleMeta: ModuleMeta = {
       slug: parsedMod.slug,

lib/lessons.ts

@@ -3,7 +3,7 @@ import { readFile } from "node:fs/promises";
 import { existsSync } from "node:fs";
 import { join } from "node:path";
 import { cache } from "react";
-import yaml from "js-yaml";
+import { load } from "js-yaml";
 import {
   lessonFileSchema,
   type Check,
@@ -27,7 +27,7 @@ async function loadOne(entry: LessonEntry): Promise<Lesson> {
   if (!existsSync(yamlPath)) throw new Error(`${slug}: missing lesson.yaml`);
   if (!existsSync(mdxPath)) throw new Error(`${slug}: missing lesson.mdx`);
 
-  const file = lessonFileSchema.parse(yaml.load(await readFile(yamlPath, "utf8")));
+  const file = lessonFileSchema.parse(load(await readFile(yamlPath, "utf8")));
   const meta: LessonMeta = { ...file, slug, order, module: moduleMeta };
 
   const mdxSource = await readFile(mdxPath, "utf8");

scripts/prepare-templates.ts

@@ -22,7 +22,7 @@ import { config } from "dotenv";
 import { readFile } from "node:fs/promises";
 import { existsSync } from "node:fs";
 import { join } from "node:path";
-import yaml from "js-yaml";
+import { load } from "js-yaml";
 import { Client } from "pg";
 import { lessonFileSchema } from "../lib/lesson-schema";
 import { discoverLessons } from "../lib/lesson-discovery";
@@ -51,7 +51,7 @@ async function loadLessonSeeds(): Promise<LessonSeed[]> {
   for (const { slug, dir } of entries) {
     const yamlPath = join(dir, "lesson.yaml");
     if (!existsSync(yamlPath)) throw new Error(`${slug}: missing lesson.yaml`);
-    const meta = lessonFileSchema.parse(yaml.load(await readFile(yamlPath, "utf8")));
+    const meta = lessonFileSchema.parse(load(await readFile(yamlPath, "utf8")));
     const seedPath = join(dir, meta.seed);
     const seedSql = existsSync(seedPath) ? await readFile(seedPath, "utf8") : "";
     if (!seedSql.trim()) throw new Error(`${slug}: seed "${meta.seed}" is empty`);

scripts/validate-lessons.ts

@@ -17,7 +17,7 @@
 import { readFile } from "node:fs/promises";
 import { existsSync } from "node:fs";
 import { join } from "node:path";
-import yaml from "js-yaml";
+import { load } from "js-yaml";
 import { lessonFileSchema } from "../lib/lesson-schema";
 import { discoverLessons, type LessonEntry } from "../lib/lesson-discovery";
 
@@ -36,7 +36,7 @@ async function validateOne(entry: LessonEntry): Promise<Result> {
 
   let meta;
   try {
-    meta = lessonFileSchema.parse(yaml.load(await readFile(yamlPath, "utf8")));
+    meta = lessonFileSchema.parse(load(await readFile(yamlPath, "utf8")));
   } catch (err) {
     errors.push(`lesson.yaml invalid: ${(err as Error).message}`);
     return { slug, ok: false, errors };