Dynamic blocks

#+BEGIN: clocktable :scope file :maxlevel 2 :block thisweek
#+END:

<prefix>xu / xU  Update the block at the cursor / all blocks. <C-c><C-c> on
                 the #+BEGIN: line also updates it.

clocktable parameters (the output matches Emacs 9.8):
  :scope     file|subtree|tree|treeN|agenda|agenda-with-archives|
             file-with-archives|("a.org" "b.org")
  :maxlevel  N (default 2)
  :block     today, yesterday, thisweek, lastweek, thismonth, lastmonth,
             thisq, lastq, thisyear, lastyear (the this* forms and today
             take -N / +N), untilnow, 2026-09-23, 2026-W39, 2026-Q3,
             2026-09, 2026. It wins over :tstart / :tend.
  :tstart / :tend   timestamps or <now>, <today>, <yesterday>,
             <tomorrow>, <-2d>, <+1w>, <-3h> (h from now, d w m y from
             today)
  :wstart / :mstart  first day of the week (1 = Monday) / of the month
  :step      day|week|semimonth|month|quarter|year: one table per period
             of the :block or :tstart/:tend range (:stepskip0 t skips
             empty ones)
  :match     a match string (org-match-syntax)
  :formula % add a percentage column; :formula "$3=$2;t" adds a
             #+TBLFM line. A #+TBLFM below the table survives updates.
  :sort (2 . ?T)  sort the rows by a column (a/A n/N t/T)
  :lang de   headers in de, es, fr, nl, nn, pl, pt-BR or sk
  :filetitle t  #+TITLE instead of the file name in the file column
  :properties ("Effort" "OWNER")   property columns (:inherit-props t)
  :level t   a level column        :timestamp t  a timestamp column
  :tags t    a tags column         :emphasize t  bold level 1, italic 2
  :link t    link headlines        :fileskip0 t  skip files without time
  :hidefiles t  no file column     :tcolumns N   at most N time columns
  :compact t    one time column, indented headlines
  :indent nil   no \_ indentation
  :narrow 40!   cut headlines at 40 characters (the default); :narrow 40
                adds a <40> width row instead
  :header "text"  replace the #+CAPTION: line

columnview parameters: :id local|global|file:path|ID (default local), :maxlevel, :skip-empty-rows, :indent, :format, :match (tags / property match), :exclude-tags (a b) (inherited tags count), :hlines t|N (a hline before each entry, or each entry of level N or less), :vlines t (column groups), :link t (link items to their headings), :formatter (the name of a global Lua function function(rows, params) returning the lines; columns_dblock_formatter sets one for every block; rows are the titles, "hline", then { level = n, hl = headline, cells... }). Like Emacs (org-columns-dblock-write-default), a first row of width cookies (<25>) is written when the format has widths, and the columns are shrunk; ITEM loses statistics cookies, footnote references, targets and inline src blocks / calls; archived and commented subtrees are skipped. Keywords like #+NAME: above the table and the first #+TBLFM: line below it are kept, and the formulas re-applied. A | in a value is written as \vert{} (Emacs writes it raw, which breaks the table).

Custom blocks:

require("org.dblock").register("myblock", function(params, ctx)
  return { "| generated | table |" }
end)