Frontmatter

A Concept's frontmatter is the YAML block at the top of the file. Sunstone shows it as a YAML editor above the text, so what you see is exactly what's in the file.

---
type: Playbook
title: Rollout plan
tags: [release, ops]
---

Folding

Nested blocks fold, and a folded block says what it hides ("3 entries", "2 keys"). Long blocks such as sources and verified start folded when a Concept opens.

Checks and completion

In a Bundle that declares an OKF version, the editor knows the spec. It flags missing required fields and wrongly typed values, and completes keys and values as you type. In a plain folder of markdown it only checks YAML syntax.

Dates

Dates in the frontmatter read as relative times ("3 days ago"). Hover one for the exact date and time.