Store

import { createStore } from 'sigmx'
const store = createStore()

method
get(path)	value at a dotted path: a leaf value, a namespace proxy, or undefined. Reads subscribe the current effect.
set(path, value)	replace the value; plain objects become namespaces; null/undefined removes
merge(patch, { at?, ifMissing? })	JSON merge-patch into the root or a path; computed leaves are skipped
remove(path)	remove a leaf or a whole namespace
has(path)
define(path, signal)	install a Signal or Computed as the leaf
paths(filter?, { computed? })	every leaf path, optionally filtered; computed: false leaves computeds out
snapshot(filter?, { at?, computed? })	plain-object copy
onPatch(fn)	called after each settled batch with the nested patch; returns an unsubscribe
$	root namespace proxy

Filters are { include?: RegExp; exclude?: RegExp } or a predicate over paths.