A derivation branch (and its ELSE) now runs its action and then each
entry of an optional extra_actions list, in order; each action sees the
previous one's write. The library editor gets "+ And" rows, the canvas
modal shows every action and gives each its own value override (keyed
"bi.K" / "else.K"), and WP Debug lists every action a branch ran.
$name.neg / $name.K.neg reads the negatives a variable carries. It rides
the accessor grammar's axis slot, so "neg" is reserved as an accepts
group name. Reading .neg is not a read of the variable, so it carries no
negatives along. Works in values, combines, the Assembler's negative
template and conditions; autocomplete offers it after the dot.
Both stamp schema v8. Cascade fixers and scans now walk the real
derivation action shape (action, extra_actions, else) instead of a stale
"actions" list, and read-only previews keep a var chip's accessor.
Claude
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