@soeditor/projections

DOM-free coordination for persistent SoEditor Visual, HTML Source, Markdown, and Preview projections. Canonical content remains owned by Core; this package only coordinates visibility, one logical primary writer, effective readonly state, attachment lifecycle, and shared commands.

Installing ProjectionCoordinatorPlugin enables coordinated engines. Existing engines retain their legacy single-mode behavior when this plugin is absent.

Commands:

• projection.activate(id) transfers primary write authority to one visible, attached, format-compatible editable projection;
• projection.show(id) keeps an attached projection visible;
• projection.hide(id) hides a non-primary attached projection.

Preview is always readonly and cannot become primary. An editor-level readonly policy keeps the logical primary but makes every activity effectively readonly.