v0.2 Acceptance Checklist

Corresponds to dev-roadmap.md §5 "◆ v0.2 acceptance (DoD)" and design.md §0.2 implementation progress log.

DoD items

Requirement	Status	Evidence
Scale (linear/log/pow/time + ticks/format/invert)	✅	scale/scale-playground, scale/log-plot; scale.test.ts
Math construct library (NumberLine/Axes/Planes/Graph/Riemann/Tangent/Matrix/Table/Brace/DecimalNumber)	✅	math/* (5); constructs.test.ts
Morph (arc-length/anchor/cross-fade + matching part matching)	✅	morph/* (3); morph-strategies.test.ts
Text / LaTeX pipeline (parse→layout→writing→matching + AssetManager)	✅	text/*, latex/*; text.test.ts
Interaction system (pick proxy hit, unprojection, draggable, keyboard)	✅	interaction/* (3); interaction.test.ts
Layout + Inspector (alignTo/nextTo/fitTo/arrange, hierarchy, inspector)	✅	layout/*, devtools/inspector-tour; layout.test.ts
Interactive calculus demos (Riemann convergence, tangent at moving point, drag exploration)	✅	math/riemann-sum, math/tangent-derivative, interaction/explorable-derivative
Formula part morph available	✅	latex/transform-matching-tex, morph/matching-shapes
All packages VERSION bumped to 0.2.0	✅	packages/*/src/index.ts, packages/*/package.json
CI green	✅	lint + typecheck + vitest + depcruise (119 modules 0 violations) + build

Milestone exit criteria (summary)

M7 · Scale

• [x] linearScale/logScale/powScale/timeScale + ticks/tickFormat/invert
• [x] D3 nice-number ticks; log boundary, time span cases

M8 · Math construct library

• [x] Construct factories (constructs/) + axesObject rewritten on Scale (xScale/yScale)
• [x] Attached constructs positioned via c2p; Riemann convergence, tangent slope, planes round-trip

M9 · Morph

• [x] arc-length / anchor / cross-fade / matching four strategies
• [x] group2D + part keys; contour padding; property-based random shape stability

M10 · Text / LaTeX

• [x] parseSvgPath + built-in stroke font + LaTeX subset; textObject/latexObject
• [x] write() stroke reveal; transformMatchingTex; AssetManager build-time prepare
• [x] M8 labels upgraded to stroke font

M11 · Interaction system

• [x] PickProxy (disc/rect/band) + hitTest; three-coordinate events
• [x] draggablePoint/Value(Source); on()/interactive()
• [x] R3F unprojection + pointer dispatch + cursor; IntermactCanvas keyboard forwarding

M12 · Layout + Inspector

• [x] LayoutHandle (getBounds/alignTo/nextTo/fitTo/arrange)
• [x] Transform hierarchy (setParent + Player snapshot world transform composition)
• [x] Inspector (registry/runtime state/active Track/reactive graph/bounds highlight)

Known deviations (non-blocking for v0.2)

• Text/LaTeX uses built-in stroke vector font + LaTeX subset (not KaTeX/MathJax + troika MSDF); trait/part-key contract unchanged, real engine drop-in ready.
• Lowercase rendered as small-caps; font covers uppercase+digits+common symbols.
• Interaction hit uses scene-space analytic intersection (pick proxy) instead of WebGL raycast threshold; equivalent under 2D orthographic.
• LayoutHandle immediately writes authorized transform for chained layout; fitTo is uniform scale.
• Inspector bounds projection defaults to contain fit.
• Morph does not replaceObject on completion (geometryOverride model); chained morph awaits serialization/player enhancement (§22.1).

See design.md §0.2 implementation progress log.