diff --git a/src/data/series.ts b/src/data/series.ts
index 8e1987f..ff83eb4 100644
--- a/src/data/series.ts
+++ b/src/data/series.ts
@@ -1,12 +1,18 @@
 // Post series - numbered badges on blog cards, keyed by post slug.
 //
-// Three arcs, each a skill pillar the site advertises. A post carries exactly
+// Six arcs, each a skill pillar the site advertises. A post carries exactly
 // ONE badge; the number is its reading order within the arc (curated, not by
 // date). New posts pick their series at draft time - see the blog-writing skill.
 //
-//   SECURITY   - identity, secrets, least-privilege, blast-radius (zero-trust)
-//   NETWORKING - Cilium/eBPF, edge exposure, TLS, load-balancing
-//   PLATFORM   - GitOps delivery, immutable infra, operations, DR
+//   SECURITY      - identity, secrets, least-privilege, blast-radius (zero-trust)
+//   NETWORKING    - eBPF datapath, policy enforcement, edge exposure, DNS
+//   PLATFORM      - GitOps delivery, immutable infra, operations, DR
+//   EDGE AI       - GPU-as-code, inference at the edge, fail-closed CV
+//   AUTOMATION    - Ansible/IaC, single-touch deploys, CI gates, config as contract
+//   OBSERVABILITY - metrics, alerting that reaches a human, debugging method
+//
+// Full inventory of live + drafted ideas: drafts/BLOG-LEDGER.md - search it
+// before drafting anything new.
 export const series: Record<string, { name: string; number: number }> = {
   // SECURITY SERIES - the zero-trust spine
   "secret-zero": { name: "SECURITY SERIES", number: 1 },