A command whose params document "layer":id acts on that layer, but its
availability check looked at the active layer. With another layer selected,
`layer.smartObjects.replaceContents {"layer": N, "path": …}` failed with "the
active layer is a Group layer, not a smart object", although layer N is a
smart object; likewise Rasterize, Export Contents, Merge Down and the rest.
Scripts, recorded actions and MCP agents hit this whenever the selection
differs from the layer they name.
Two allow-lists covered part of it: #466 (smart filters, Edit Contents,
Convert to Layers) and #2457 (hide, show, rename with nothing selected). The
#466 check now applies to every command that documents "layer":id (210
today; the old list is a subset): the precondition runs with the named layer
as the active one, then the active layer is restored. A name that isn't a
layer of the active document falls back to the usual check, so bad ids still
fail as before. It moves from smart_cmds to Session, as it isn't specific to
smart objects any more.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
