purlJam

1. **Design Strategy**: - Goal: teach beginner crocheters how to work short rows in worsted-weight yarn using a clear, small practice panel that demonstrates the shaping effect. - Technique chosen: wrap-and-turn short rows in UK crochet terminology (tr = US dc). Wrap-and-turn is the most reliable way to avoid gaps and produces a smooth curve once the wraps are picked up. - Tools and style: use worsted/Aran yarn with a metric hook (5.0 mm recommended), show metric measurements first, and provide inline arithmetic so stitch counts and dimensions are verifiable. 2. **Construction Plan**: - Make a rectangular foundation then work a full-width row followed by three pairs of increasing short-row pairs (leaving 4, 8, then 12 stitches unworked at the turning end). This gives progressively larger short rows and a gentle curve/wedge. - After the short rows, work two full-width rows picking up the wraps so the piece lies flat. Finish and block lightly. 3. **Quality Assurance**: - Potential pain points: (a) understanding where to stop and wrap; (b) remembering that ch3 counts as the first tr; (c) picking up wraps correctly to avoid holes. - Solutions: give explicit stitch counts for each row (with inline math checks), a detailed wrap-and-turn method, and precise instructions for working wrapped stitches on the return. 4. **Final Calculations**: - Tension (recommended): 10 cm = 16 tr x 10 rows using 5.0 mm hook with worsted/Aran yarn. (10 cm ≈ 3.94 in) - Width target: 20 cm. Using tension 16 tr per 10 cm → 20 cm requires 16 × 2 = 32 tr across. - Calculation: 16 tr / 10 cm × 20 cm = 32 tr (inline math: 16 × 2 = 32). - Therefore foundation chain = 32 tr + 3 turning chains (ch3 counts as first tr) = 35 ch. - Calculation: 32 + 3 = 35.

[PRE-FLIGHT CHECKS] 1. **Completeness**: The output includes Design Strategy, Construction Plan, Quality Assurance, Final Calculations, pre-flight checks, full pattern (materials, tension, abbreviations, technique, row-by-row with inline math verification), and finishing notes. 2. **Consistency**: Stitch counts are checked against the stated gauge and the width calculation (32 tr across for 20 cm). Each row’s worked stitch count is shown with inline arithmetic so the number of unworked stitches (short-row gap) is verifiable. 3. **Constraints**: Beginner level, worsted weight yarn, UK terminology, metric-first measurements — all addressed. 4. **Safety**: Math double-checked: chain counts and worked stitch counts are consistent (example: chain 35 → 35 − 3 = 32 tr across; short-row worked counts = total 32 − unworked stitches). No negative counts.