Merge branch 'feat/edge-glyph'

app/api/graph/costs/route.ts

@@ -0,0 +1,19 @@
+/**
+ * GET /api/graph/costs — the graph view's cost pill (2026-09 graph cost
+ * metrics wave): what the graph PIPELINE cost, folded read-time from the
+ * three usage channels (chat extraction runs, notes-source runs,
+ * cluster-naming runs). Thin transport over src/server's graphCosts();
+ * the fold itself is pure core (core/cost-summary.ts). Dollars are
+ * inferred from PRICES at read time — never stored, so a price sync
+ * re-prices the whole history for free.
+ *
+ * Scope (user-decided): the graph pipeline ONLY — teaching turns and
+ * sub-agent jobs have their own cost channels elsewhere.
+ */
+import { graphCosts } from "@/src/server";
+
+export const dynamic = "force-dynamic";
+
+export async function GET() {
+	return Response.json(graphCosts());
+}