The lines that join a tab to the workers its codeman skill spawned were
drawn with numbers tuned against two tabs sitting side by side, and they
degraded in exactly the two situations the feature is actually used in.
1. A spawned worker is appended to the END of the strip, so the real span
between a lead and its worker is 800-1500px. With the dip clamped at
44px that is a 33px sag: the arc reads as a straight line drawn across
the terminal instead of a bracket hanging under the strip. The dip now
grows at 0.085/px and clamps at 104.
2. When the desktop strip wraps (tabs-two-rows / tabs-auto-wrap), a parent
on row 1 and its child on row 2 are ~14px apart, and the cross-row
branch drew parent-bottom to child-TOP: a flat line hidden inside the
row gap, with siblings overprinting each other. Both ends now anchor on
the tab BOTTOM with the control points below the LOWER row, so a wrapped
pair gets the same bracket a flat strip gets. That deletes the branch:
one shape covers both.
Visibility, at 1:1 rather than in a zoomed mockup: 2 -> 2.5px stroke,
4 4 -> 5 5 dashes (lineage-flow moves with them, -16 -> -20), opacity
.55 -> .72, and a second wider glow so the contrast comes from the halo
rather than from more weight, keeping the line under the subagent lines'
3px. A working child is bright (.95) outside the reduced-motion block, so
turning motion off no longer also dims every worker's arc. Sibling nesting
6 -> 8px and the direction dot 3 -> 3.5px to match the heavier stroke.
Verified at 1:1 in a harness driving the real styles.css and the real
computeLineagePath over three layouts (adjacent workers, workers at the
far end of a full strip, wrapped two-row strip) on a dark and a light
skin. test/session-lineage-lines.test.ts pins both regressions.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Codeman maintainer