Reactivity adapter capability matrix

Generated 2026-07-23.

Adapter	effects	effectOwnership	signalEquality	computedEquality	batching	deterministicFlush	directObservation	writableComputed	graphInspection	serverSnapshots	Note
vanilla	yes	yes	yes	no	yes	yes	yes	no	no	no	reference implementation
angular (no Injector)	no	no	yes	yes	no	no	no	no	no	no	effect-dependent features disabled; source-verified by reactivity-angular.spec.ts, not live-imported (see script comment)
angular (with Injector)	yes	yes	yes	yes	no	no	no	no	no	no	source-verified by reactivity-angular.spec.ts, not live-imported (see script comment)
react	yes	yes	yes	no	yes	yes	yes	no	no	no	= vanilla (no signal primitive of its own)
preact	yes	yes	yes	no	yes	yes	yes	no	no	no	= vanilla (no signal primitive of its own)
svelte	yes	yes	yes	no	yes	yes	yes	no	no	no	= vanilla (no signal primitive of its own); toStore() bridges to a Readable
lit	yes	yes	yes	no	yes	yes	yes	no	no	no	= vanilla (no signal primitive of its own)
vue	yes	yes	yes	no	yes	yes	yes	no	no	no	native @vue/reactivity; effect() scheduler + createScope() via effectScope() (Phase P2, 2026-07-23)
solid	yes	yes	yes	yes	yes	yes	yes	no	no	no	native createSignal/createMemo/createEffect; equals comparator honored on both signal and memo (Phase P3, 2026-07-23)

“—” means the adapter has no capabilities object yet (pre-Milestone-1 shape) or could not be constructed by this script — not the same as every capability being false.