E01 · F09 · SP-006 — Research for F09

Find, read and record the sources of every story of F09 before its implementation (ADR-0020).

Acceptance criteria

• Given each story of F09, when the spike ends, then every formula and behavior it needs has a verified REF-* or a DERIV-*.
• Given the sources found, when the spike ends, then the stories cite them, and a research note records what was found and what remains open.

Questions

• Stretching points from a fixed corner of their box: the scaling formula and a source (SVG transforms, a scale about a point); how to keep it without loss when a size goes to 0 (points kept in their own box).
• The rectangle becoming a free shape: an ADR (the model of every shape), what happens to Rectangle, rectangleCorners and their tests.
• Design tools: resizing by typed width and height (which corner stays), as a functional reference.

Tasks

One task = one commit, referenced as SP-006.Tn.

• T1 — Sources, derivation of the stretch if no source states it, ADR (2 h)
• T2 — Research note, stories updated (1 h)