Measured what Resize itself already forbids: a room cannot be squeezed below
30 cm (two 15 cm walls), so П3 and П5 are unreachable through shrinking and
the gate merely fails closed there. П4 IS reachable on a fine grid, so the
smoke drags a real handle on a 2 cm grid: two rooms 10 cm apart, a 6 cm pull
would leave 4 cm between foreign nodes, the wall stops at 6 cm and exactly one
toast names the 5 cm rule.
Spec revision 6 records both the measurement and the two corrections it forces
on AC7a: a dimmed handle cannot express a per-step limit, and the plan is NOT
byte-unchanged — the allowed part of the gesture is a legitimate edit.
Issue: #329
User-Visible: no
П3 measures the WALL, not the catalogue atom: a short filler segment that
compensates a thickness step (owner's fixture, 5 cm = (30-20)/2) is a legal
continuation of a long same-thickness wall, so the rule walks the maximal
collinear run through the shared nodes before judging the length.
Resize stops at the last allowed position and names the broken rule instead
of the generic "geometry cannot be saved"; the Thickness dialog refuses
through its own toast. Both channels are pinned by demo/smoke_junction_limits
plus three mutants (angle threshold, write barrier, degenerate apex bevel).
Issue: #329
User-Visible: yes
Owner report: small serrations remained on the outer edges between the inner
and the outer vertex. Measured on the fixture ring: two ~4 cm steps plus four
micro-vertices at the tip. Their source was the inset contour's two-point
bevel folding into a bow-tie, and the earlier half-plane clip of that fold,
which left a 0.2 cm sliver the boolean union turned into steps. The inset now
ends in ITS own mitre point at a degenerate apex — mirroring the sharp outer
tip — so there is no fold to clip and no sliver to smear: the room ring is
exactly three vertices, every side longer than the half depth. The clip
helper and its cap plumbing are gone. The user-visible wording of this work
already stands in both changelogs from the #329 entry.
Issue: #329
User-Visible: no
Owner correction (chat, 2026-08-27): no flat chamfer at the tip — a plain
sharp apex. Proven by execution on the issue fixture: the outset contour fell
back to a two-point bevel (the 4·h mitre limit against an 87 cm reach) while
the inset contour folded into a bow-tie, and subtracting that fold carved the
V-notches — together they made the trident. Now a degenerate corner (below 15
degrees, inner faces meeting inside both walls) contributes ONE outset point
at the plan's own vertex — no bevel, no metres-long mitre needle — and its
inset is clipped at the convergence line so no fold is subtracted. Plain and
merely sharp pairs keep the full mitre of #310. The write-side limits of
П1-П5 stop new plans from creating such corners at all.
Issue: #329
User-Visible: yes
Codex