Checkpoint: current Lumen state

pipeline/manifest.ts

@@ -0,0 +1,53 @@
+/**
+ * Manifest generation — deterministic, per SPIKE-04.
+ * Trace: SPIKE-04 §2, ARCH 10.2, IMPLEMENTATION-CONTRACT.md §15
+ */
+import type { FestivalManifest, SectionId } from "../src/data/festival-package/types.js";
+import type { PipelineInput, SectionFile } from "./types.js";
+
+export function buildManifest(
+  input: PipelineInput,
+  files: ReadonlyMap<string, SectionFile>,
+  totalBytes: number,
+): FestivalManifest {
+  const counts = {
+    events: input.content.schedule.events.length,
+    pois: input.content.map.pois.length,
+    assets: input.content.assets.assets.length,
+  };
+  const sections: Record<
+    SectionId,
+    { file: string; sha256: string; bytes: number; required: boolean }
+  > = {
+    emergency: entryFor(files, "emergency.json", true),
+    schedule: entryFor(files, "schedule.json", true),
+    map: entryFor(files, "map.json", true),
+    info: entryFor(files, "info.json", true),
+    assets: entryFor(files, "assets.json", true),
+  };
+  // Include optional sections if present in files and content has them (future)
+  // For now, only required 5.
+  const manifest: FestivalManifest = {
+    format: "lumen.package/1",
+    edition: input.edition,
+    packageVersion: input.packageVersion,
+    schemaVersion: input.schemaVersion,
+    generatedAt: input.generatedAt,
+    festival: { ...input.festival },
+    appCompatibility: { ...input.appCompatibility },
+    sections,
+    counts,
+    limits: { totalBytes },
+  };
+  return manifest;
+}
+
+function entryFor(
+  files: ReadonlyMap<string, SectionFile>,
+  file: string,
+  required: boolean,
+): { file: string; sha256: string; bytes: number; required: boolean } {
+  const f = files.get(file);
+  if (!f) throw new Error(`manifest missing file ${file}`);
+  return { file, sha256: f.sha256, bytes: f.bytes, required };
+}