+⋮⋮The current block layer is intentionally small and pragmatic.TextH1H2H3TodoBulletNumberedCodeQuoteDivider
+⋮⋮Every block must serialize back to deterministic markdown.TextH1H2H3TodoBulletNumberedCodeQuoteDivider
+⋮⋮tsexport type FutureBlock = | { type: "mermaid"; content: string } | { type: "admonition"; kind: "info" | "warn"; content: string };TextH1H2H3TodoBulletNumberedCodeQuoteDivider