Structs and lists were capped at two fixed levels (list of structs, struct with a list field). Anything deeper was dropped silently on load, in node settings and when written to a variable. The cap came from an early design choice, not from a technical need, so it is lifted completely instead of adding a third fixed level. - One kind list NESTED_KINDS replaces ListItemKind and StructFieldKind. The flat special cases in listItems.ts are gone, every value goes through one recursive path. - A struct inside a struct is declared, like a top-level struct. Values coming in over an edge are brought into that shape. Struct items in lists still take their fields from the value. - New valuePath.ts addresses any nested spot by keys and indices. ListSlot.field is now ListSlot.path. - Field commands (add, rename, remove) take the path to the struct. They change declaration, own value and all overrides in one undo step, as before on the top level. - Inspector: "+ Field" offers Struct and List on every level. A nested struct is a header row with its own "+ Field", its fields are indented one step further. - List tab: a list item shows "n items" and opens one level deeper. The title shows the path, e.g. "Listy · nums · [3]". - Pack in Pack now writes a struct into a struct field instead of text. Objects are kept at any depth and stripped at every exit. - A list edit in a struct field without an existing object override now starts from the shown value instead of an empty struct. - Old projects load unchanged. Save, load and save again gives the same result. Tests: - ./check.sh: 172 files, 2498 tests, CHECK EXIT 0 - e2e 21 + 22: ALL PASSED, 90 checks (new 21d-iii, 22f-ii, 21d and 22f updated) - 20 new unit tests in nested-values.test.ts and nested-list-slot.test.ts, three tests that pinned the old cap turned around - 6 counter-probes, each fails 1 to 8 tests, originals restored and checked with cmp - Not covered: a nested struct inside a struct item in the list tab has no e2e click Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>