M2: content collections — case studies, blog, RSS, tags, sitemap

Projects + blog as schema-validated content collections; structured case
studies (problem/design/outcome), blog with tag pages, reading time, RSS
feed (drafts excluded), sitemap, and Shiki dual-theme code highlighting.

src/content.config.ts

@@ -0,0 +1,39 @@
+import { defineCollection } from "astro:content";
+import { z } from "astro:schema";
+import { glob } from "astro/loaders";
+
+// Case studies. Adding a project = one .md file in src/content/projects/.
+const projects = defineCollection({
+  loader: glob({ pattern: "**/*.md", base: "./src/content/projects" }),
+  schema: z.object({
+    title: z.string(),
+    // The one-line "so what" — shown on cards and the case-study header.
+    outcome: z.string(),
+    summary: z.string(),
+    role: z.string(),
+    period: z.string(),
+    stack: z.array(z.string()),
+    featured: z.boolean().default(false),
+    // Lower sorts first on the index + homepage.
+    order: z.number().default(50),
+    // Optional diagram key → rendered by the Diagram component (M3).
+    diagram: z.string().optional(),
+    links: z
+      .array(z.object({ label: z.string(), href: z.string().url() }))
+      .optional(),
+  }),
+});
+
+// Blog — write-only, schema-validated, pipeline-publishable.
+const blog = defineCollection({
+  loader: glob({ pattern: "**/*.md", base: "./src/content/blog" }),
+  schema: z.object({
+    title: z.string(),
+    date: z.coerce.date(),
+    summary: z.string(),
+    tags: z.array(z.string()).default([]),
+    draft: z.boolean().default(false),
+  }),
+});
+
+export const collections = { projects, blog };