Plan hand-safe colour passes and serialize structured SVG

[jamiejk]

Parent

#1

What to build

Turn prepared paths into deterministic, physically safe pen passes and one authoritative SVG. Passes group by intended colour; each pass plots fills before optional linework, and each phase restarts at the configured hand-safe sweep origin.

Acceptance criteria

• Plot paths are grouped into deterministic pen passes by intended colour before spatial ordering.
• Every pass contains a plot-fill phase followed by a linework phase when those components exist.
• Each phase independently restarts from the configured hand-safe sweep origin.
• Fill regions follow the configured sweep without interleaving regions.
• Concentric paths remain contiguous per region and run outermost-to-innermost.
• Nearest-neighbour optimization cannot reorder passes, phases, regions, or a region's internal path order.
• One SVG contains all passes and phases in execution order with component and region metadata.
• The SVG has physical millimetre dimensions, intended-colour strokes, active-nib stroke width, centreline geometry, and no solid path fills.
• Semantic XML tests verify ordering and structure without relying on fragile whole-document snapshots.

Blocked by

• Drive pen passes from intended colour #4
• Generate physically spaced plot fills #6