{"$type":"com.atproto.lexicon.schema","defs":{"main":{"properties":{"facets":{"description":"Facets for text formatting","items":{"ref":"app.offprint.richtext.facet","type":"ref"},"type":"array"},"level":{"description":"Heading level (1-3)","maximum":3,"minimum":1,"required":true,"type":"integer"},"plaintext":{"description":"The heading text content","required":true,"type":"string"},"textAlign":{"description":"Text alignment","enum":["left","center","right"],"type":"string"}},"required":["plaintext","level"],"type":"object"}},"id":"app.offprint.block.heading","lexicon":1}