Each morfo now declares what its provider actually emits (via agent-based
extraction from provider code). Before: parts + data only. After: parts +
data + ARIA per part + keyboard per part + focus policy for overlays.
Contract source: provider's `readonly props = $derived.by(...)` blocks,
classified into the v.* value kinds — literal, stateRef, partRef, propRef,
translationRef. Conditions extracted from ternary / guard patterns.
Focus policies added on overlay components: popover, drawer, alert-dialog,
dropdown-menu, context-menu, select, date-picker, date-range-picker,
time-picker, time-range-picker, color-picker. Context-menu uses
return:'previous' (no discrete trigger). Tooltip, link-preview, combobox,
command omit focus (no trap).
Tag-group Link variant: morfo-check tolerates sibling parts sharing a
physical element (Link IS Item in the DOM) via allPartAttrs cross-scope.
README.md added — developer guide: authoring a morfo step-by-step, the
v.* builders, severity rules, validation layers, polymorphism handling
via defaultElement + role, Sema alignment (data-last-action, transition
markers).
Verify:
npm run check — 5 errs, all pre-existing in sium/examples.
vitest run src/uix/morfo — 7/7 pass.
morfo:check — 64/66 pass (2 flaky Playwright navigation timeouts,
re-run clean when isolated).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>