Vega Authoring

Guide for authoring and debugging raw Vega specifications.

Use when

• The task explicitly requires raw Vega rather than Vega-Lite.
• You need direct control over signals, event streams, scales, axes, legends, marks, or post-encoding transforms.
• You are debugging lower-level Vega structure or runtime behavior.

Do not use when

• The chart can be expressed cleanly in Vega-Lite with normal encodings, params, and view composition.
• The real task is authoring a Deneb visual inside Power BI; deneb-authoring should lead and apply raw Vega only if needed.
• The user mainly needs grammar selection help for a basic analytic chart.

Precedence / handoff

• If the host is Power BI or Deneb, let deneb-authoring lead and take only the grammar-specific portion after host constraints are locked.