fix(parity): fifth-pass re-audit — VimwikiGoto nargs, autowriteall, table_auto_fmt

Closes the actionable fifth-pass findings (gap doc updated):

- VimwikiGoto / NuwikiGoto: -nargs=1 -> -nargs=* in all four defs. Was a
  real bug — `:VimwikiGoto` raised E471, `:VimwikiGoto My Page` raised E488,
  and the handler's empty-arg prompt fallback was unreachable. Both clients
  already prompt on empty, so -nargs=* (keeping -complete=pages) restores
  upstream behavior.

- autowriteall (upstream default ON): while a wiki buffer is current, mirror
  Vim's global 'autowriteall' (auto-save on page switch / :make), restoring
  the prior value on leave. Neovim via ftplugin.lua setup_autowriteall
  (BufEnter/BufLeave) gated by the `autowriteall` setup option; Vim via the
  NuwikiAutoWriteAll augroup gated by g:nuwiki_autowriteall.

- table_auto_fmt (upstream default ON): re-align the table under the cursor
  on InsertLeave. Both clients, gated by `table_auto_fmt` / g:nuwiki_table_auto_fmt,
  guarded on the cursor line containing `|` before the async table_align.

Also logged (no code): VimwikiRenameFile missing -nargs=? (subsumed by the
LSP-rename divergence), table_reduce_last_col, user_htmls, hl_headers/
hl_cb_checked, and a commentstring value-mismatch note. Mappings audit clean.

The Neovim harness disables table_auto_fmt in setup (its async re-align would
perturb the deterministic table-nav keystroke cases); its wiring is verified
on a throwaway scratch buffer instead. Docs (README + doc/nuwiki.txt) updated.
Tests: cmd.VimwikiGoto_accepts_multiword, config.autowriteall_applied,
config.table_auto_fmt_autocmd. Neovim 293, Vim 285/18/21 pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

development/tests/test-keymaps-vim.vim

@@ -692,6 +692,32 @@ call s:record(
       \ 'cmd.search_and_tablealign_nargs',
       \ 'err=' . s:attr_err)
 
+" ===== :VimwikiGoto -nargs=* =====
+" Was -nargs=1, so a page name with a space raised E488 (and the empty-arg
+" prompt fallback was unreachable). Now -nargs=*: a multi-word arg must parse.
+" The goto is an LSP roundtrip (no server here); swallow non-attribute errors.
+let s:goto_err = ''
+try
+  silent! VimwikiGoto My Page
+catch /E471\|E488/
+  let s:goto_err = v:exception
+catch
+  " no-LSP / not-found errors are expected and fine here.
+endtry
+call s:record(
+      \ s:goto_err ==# '' ? 1 : 0,
+      \ 'cmd.VimwikiGoto_accepts_multiword',
+      \ 'err=' . s:goto_err)
+
+" ===== autowriteall / table_auto_fmt (Vim path) =====
+" autowriteall (default on) sets Vim's global &autowriteall on the wiki buffer.
+call s:record(&autowriteall ? 1 : 0, 'config.autowriteall_applied',
+      \ '&autowriteall=' . &autowriteall)
+" table_auto_fmt (default on) registers the NuwikiTableAutoFmt InsertLeave group.
+call s:record(exists('#NuwikiTableAutoFmt#InsertLeave') ? 1 : 0,
+      \ 'config.table_auto_fmt_autocmd',
+      \ exists('#NuwikiTableAutoFmt#InsertLeave') ? '' : 'no InsertLeave autocmd')
+
 " ===== :VimwikiRemoveDone -bang -range =====
 " Upstream is `-range`; nuwiki had `-bang` only, so `:'<,'>VimwikiRemoveDone`
 " raised E481. Now `-bang -range`: a ranged invocation must parse (no E481),

development/tests/test-keymaps.lua

@@ -255,6 +255,34 @@ vim.defer_fn(function()
     end
   end
 
+  -- ===== Config-driven buffer behaviors =====
+  -- autowriteall (default on) mirrors into Vim's global 'autowriteall' while
+  -- the wiki buffer is current.
+  record(vim.o.autowriteall == true, 'config.autowriteall_applied',
+    vim.o.autowriteall and '' or 'autowriteall not set on the wiki buffer')
+  -- table_auto_fmt wiring: with the option enabled, attaching a buffer
+  -- registers a buffer-local InsertLeave autocmd. (It's off in the harness
+  -- setup so the async re-align doesn't perturb the table-nav cases below, so
+  -- verify on a throwaway scratch buffer in its own window.)
+  do
+    local cfg = require('nuwiki.config')
+    cfg.options.table_auto_fmt = true
+    vim.cmd('new')
+    local sbuf = vim.api.nvim_get_current_buf()
+    require('nuwiki.ftplugin').attach(sbuf)
+    local found = false
+    for _, a in ipairs(vim.api.nvim_get_autocmds({ event = 'InsertLeave', buffer = sbuf })) do
+      if a.group_name and a.group_name:match('^nuwiki_taf_') then
+        found = true
+        break
+      end
+    end
+    record(found, 'config.table_auto_fmt_autocmd',
+      found and '' or 'attach did not register the InsertLeave autocmd when enabled')
+    cfg.options.table_auto_fmt = false
+    vim.cmd('bwipeout!')
+  end
+
   -- ===== Lists =====
 
   run('list.toggle_via_C-Space', {

development/tests/test-keymaps.sh

@@ -39,8 +39,14 @@ cat > "$INIT" <<EOF
 vim.opt.runtimepath:prepend('$REPO_ROOT')
 vim.g.nuwiki_binary_path = '$BIN'
 -- Enable the opt-in mouse mappings so the harness can assert the full
--- documented mapping surface (doc §6 mouse group).
-require('nuwiki').setup({ wiki_root = '$TMP/wiki', mappings = { mouse = true } })
+-- documented mapping surface (doc §6 mouse group). table_auto_fmt is off here
+-- so its async on-InsertLeave re-align doesn't perturb the deterministic
+-- table-nav keystroke cases (its wiring is verified on a scratch buffer).
+require('nuwiki').setup({
+  wiki_root = '$TMP/wiki',
+  mappings = { mouse = true },
+  table_auto_fmt = false,
+})
 EOF
 
 RESULTS="$TMP/results.txt"

development/vimwiki-gap.md

@@ -172,6 +172,21 @@ fix site.
 ## P3 — Niche / low impact
 
 ### Commands
+- [x] **`VimwikiGoto`/`NuwikiGoto` were `-nargs=1`** _(new, 2026-06-03 re-audit;
+  fixed same day)_ — upstream is `-nargs=*` (`ftplugin/vimwiki.vim:337`); nuwiki's
+  four defs were `-nargs=1`, so `:VimwikiGoto` (no arg) raised **E471** and
+  `:VimwikiGoto My Page` (spaced name) raised **E488** — and the handler's
+  empty-arg `input('Goto page: ')` prompt fallback was unreachable. _Fix:_ all
+  four defs (Vim+Neovim × `Vimwiki*`/`Nuwiki*`) are now `-nargs=*` (keeping
+  `-complete=…pages`); `<q-args>` joins a spaced name and an empty arg reaches
+  the prompt. Both handlers already prompt on empty. Covered by
+  `cmd.VimwikiGoto_accepts_multiword` (`test-keymaps-vim.vim`).
+- [ ] **`VimwikiRenameFile` lacks `-nargs=?`** _(new, 2026-06-03 re-audit)_ —
+  upstream is `-nargs=? -complete=…file`; nuwiki's defs are bare, so
+  `:VimwikiRenameFile foo` raises E488. Subsumed by the existing "rename
+  delegates to the LSP rename request, takes no filename arg" divergence (the
+  `-complete=` item below) — adding `-nargs=?` (accepted-ignored) would restore
+  signature parity if desired. Low priority.
 - [ ] `VimwikiVar` — config-var get/set introspection. _Fix:_ `plugin/nuwiki.vim`.
 - [x] **`VimwikiShowVersion`** _(fixed 2026-06-03)_ — added global
   `VimwikiShowVersion`/`NuwikiShowVersion` (both clients) echoing
@@ -400,6 +415,42 @@ fix site.
   `cmd.VimwikiSplitLink_accepts_args` (`test-keymaps-vim.vim`, no E488).
 
 ### Config
+- [x] **`autowriteall`** _(new, 2026-06-03 re-audit; fixed same day)_ — upstream
+  global (`vars.vim:136`, default **`1`/ON**): while a wiki buffer is current,
+  mirror Vim's global `'autowriteall'` (auto-save a modified buffer on page
+  switch / `:make`), restoring the prior value on leave (upstream
+  `plugin/vimwiki.vim:165-166,39`). nuwiki had no equivalent → out-of-box
+  behavioral divergence. _Fix:_ client-side, both clients — Neovim
+  `lua/nuwiki/ftplugin.lua` (`setup_autowriteall`, BufEnter/BufLeave save+set/
+  restore) gated by the `autowriteall` setup option (default true); Vim
+  `ftplugin/vimwiki.vim` (`NuwikiAutoWriteAll` augroup) gated by
+  `g:nuwiki_autowriteall` (default 1). Covered by `config.autowriteall_applied`
+  in both harnesses.
+- [x] **`table_auto_fmt`** _(new, 2026-06-03 re-audit; fixed same day)_ —
+  upstream global (`vars.vim:183`, default **`1`/ON**): re-format the table under
+  the cursor on `InsertLeave` (upstream `plugin/vimwiki.vim:330`). nuwiki had no
+  equivalent (tables formatted only via `gqq`/`gww`). _Fix:_ client-side
+  `InsertLeave` autocmd, gated by config — Neovim `table_auto_fmt` setup option
+  (default true, `ftplugin.lua` `setup_table_auto_fmt`); Vim
+  `g:nuwiki_table_auto_fmt` (default 1, `NuwikiTableAutoFmt` augroup). Both guard
+  on the cursor line containing `|` before the (async LSP) `table_align`, so
+  non-table edits don't round-trip. Covered by `config.table_auto_fmt_autocmd`
+  in both harnesses. _(Divergence: nuwiki's `table_align` is an async server
+  edit, vs upstream's synchronous format — the result lands a beat after Esc.)_
+- [ ] **`table_reduce_last_col`** _(new, 2026-06-03 re-audit)_ — upstream global
+  (`vars.vim:184`, default `0`): don't expand the last column separator to fill
+  the cell. nuwiki absent. Low impact (off by default). _Fix:_ thread a flag into
+  the table-format routine.
+- [ ] **`user_htmls`** _(new, 2026-06-03 re-audit)_ — upstream global
+  (`vars.vim:191`, default `''`): comma-separated HTML files with no wiki source
+  that `:VimwikiAll2HTML` must not delete. nuwiki absent — only relevant if
+  nuwiki's all-to-HTML prunes orphan HTML (it may not, in which case this is moot
+  and worth a one-line divergence note rather than code).
+- [ ] **`hl_headers` / `hl_cb_checked`** _(new, 2026-06-03 re-audit)_ — upstream
+  globals (`vars.vim:158`/`157`, both default `0`): per-level header highlight /
+  checked-checkbox line highlight. nuwiki absent. Borderline — either implement
+  via highlight groups/semantic tokens, or fold into the `conceal*`/`maxhi`
+  highlighting-divergence family so future audits stop flagging them.
 - [x] **`list_margin` — buffer-side parity + markdown default** _(new,
   2026-06-02 re-audit; fixed 2026-06-02)_ — upstream (`vars.vim:516`, doc
   `vimwiki.txt:2667`): left-margin **width in spaces for buffer-side generated
@@ -449,7 +500,9 @@ fix site.
 - [ ] `dir_link` — index file to open when following a directory link.
 - [ ] `auto_chdir` — `:cd` into wiki root on open (client-side).
 - [ ] `bullet_types` / `cycle_bullets` — custom bullet glyphs + wrap-around.
-- [ ] `commentstring` (`'%%%s'`) — comment toggling/text-objects.
+- [ ] `commentstring` (`'%%%s'`) — comment toggling/text-objects. _(2026-06-03
+  re-audit: also a value mismatch — nuwiki hardcodes `%% %s` (with a space) in
+  `ftplugin/vimwiki.vim:18` vs upstream's no-space `%%%s`; align when picked up.)_
 - [ ] `color_tag_template` — `color_dic` present; template regex missing.
   Related divergence _(2026-05-31 config re-audit)_: nuwiki's `color_dic`
   defaults to **empty** while upstream ships a populated palette
@@ -608,3 +661,13 @@ audits don't re-flag them.
   of the documented "generated-content is vimwiki-only" divergence. All five
   P1-blocking sections remain clear; only niche P3 items (and the deferred
   markdown work) are left.
+- Re-audited 2026-06-03 (fifth pass — commands / config / mappings, three
+  parallel agents) against vimwiki `a54a300` (still no upstream commits since
+  2026-04-30). **Mappings: clean** again (confirmed `gLH/gLL/gLR` correct; no new
+  gaps, no regressions). **Commands:** one real bug — `VimwikiGoto`/`NuwikiGoto`
+  were `-nargs=1` (E471/E488 + unreachable prompt), fixed same day; plus
+  `VimwikiRenameFile`'s missing `-nargs=?` logged (subsumed by the LSP-rename
+  divergence). **Config:** five new items — `autowriteall` and `table_auto_fmt`
+  (both ON upstream → out-of-box divergences, implemented same day),
+  `table_reduce_last_col`, `user_htmls`, `hl_headers`/`hl_cb_checked` logged; and
+  a `commentstring` value-mismatch note. No previously-closed item regressed.