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Upstream's :Vimwiki[V]SplitLink take optional reuse_other_split_window + move_cursor flags (the link is always the one under the cursor); nuwiki's defs took no args, so `:VimwikiSplitLink 0 1` raised E488. All eight defs (both clients × Split/VSplit × Vimwiki/Nuwiki) are now -nargs=*, restoring signature parity for migrated configs/scripts. Documented divergence: the two flags are accepted but not acted on — nuwiki always opens a fresh split and follows in it. Honoring move_cursor/reuse would require threading a completion callback through the async LSP follow path, disproportionate for this rarely-used arg form; the no-arg path (99% case) is fully equivalent. The gap-doc note (which wrongly described the args as a "target link") is corrected. Test: cmd.VimwikiSplitLink_accepts_args (test-keymaps-vim.vim, no E488). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>