[cowboyd]

Every later subsystem relies on nodes having a dependable attachment lifecycle. Creating a node must register it with its parent so inherited APIs can propagate through the actual tree, while destroying a subtree must remove every descendant cleanly. Lifecycle itself must also be middleware-extensible so hosts and future subsystems can react to attachment and removal without embedding those concerns in the tree primitive.

Stable node identities are also required when layout operations are handed to the terminal renderer. Providing lifecycle and identity through the same API mechanism proves that the abstraction works for foundational operations, not only higher-level UI behavior.

This PR adds middleware-extensible create, destroy, and id lifecycle operations. Creation registers children and assigns stable identifiers, while destruction recursively removes a subtree from its parent.

[pkg-pr-new]

• @examples/basic

  npm i https://pkg.pr.new/bombshell-dev/ui/@clack/ui@19
  

commit: a05004a

[cowboyd]

closing out in favor of a DOM based substrate. See #37