FA-97523 / Knitting and sewing pattern grading / Member archive

Sewing pattern grade rule stepper: downward grading sign · case 03

Grading a pattern down makes it bigger.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Sizes 6..22 in steps of 2 (others -> "error: size"). Grading one size step between sizes s and s+2 changes the circumference by `small` cm if the lower size s < brk, else `large`. Going down subtracts the same step amounts. Return [circumference, per quarter-panel = circumference/4], both half-up to 0.1.

Why this case matters

Sewing pattern grading applies different increments above a size break and distributes them across front and back pieces.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
down across the break	`[127.0, 31.8]`	`[93.0, 23.3]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.