editor

ADR-0018 — Bézier curves allowed in static drawings only ​

Status: Accepted

Context ​

ADR-0001 limits geometry to segments and circular arcs, so that symbols stay schematic and exact. Business users also need to draw free decorations in the View Editor (static drawings, docs/domain/shapes.md §8). The Product Owner asked for a Figma-like pen there: click to place points, drag a point to pull curve handles (Q12).

Decision ​

  • Static drawings may contain cubic Bézier curves, created with a Figma-like pen.
  • Symbols keep ADR-0001 unchanged: segments and arcs only, no pen, no freehand.
  • A drawing has no parameter and no animation; it never enters the symbol pipeline (corner radius, booleans, offsets of symbols).

Consequences ​

  • ADR-0001's scope is narrowed to symbols; its decision stays valid there.
  • Drawings need their own path model (segments + cubic Béziers) and their own d output (C command); booleans, offsets and exact lengths on Béziers are out of scope until a later ADR.
  • The CLAUDE.md prohibition "no Bézier" applies to symbols only.

References ​

ADR-0001, REF-SVG2-PATHS