fix(diagram): restore hollow rendering for O-version edge markers#2656
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Co-authored-by: davydkov <824903+davydkov@users.noreply.github.com>
Fix O-version edge markers to display as hollow with background fill instead of solid fill. This addresses issue #2634. Signed-off-by: Denis Davydkov <denis@davydkov.com>
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[WIP] Fix arrows EdgeMarker O-version rendering issue
fix(diagram): restore hollow rendering for O-version edge markers
Feb 21, 2026
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Description
O-version edge markers (
odiamond,oarrow,odot) were rendering solid instead of hollow. Commit 22250c0 changed their fill fromvar(--likec4-background-color)tocontext-stroke, removing the background-colored interior that distinguished them from standard markers.Changes
var(--likec4-background-color)for:OArrowmarkerODiamondmarkerODotmarkerThis restores the hollow appearance where markers have colored strokes with background-colored fills, making them visually distinct from their solid counterparts.
Before: Solid fill (incorrect)

After: Hollow with background fill (correct)

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