fukuyori/wtmux 1.7.1

on GitHub

[1.7.1] - 2026-07-06

Fixed

• Stray spaces / blank spans appearing inside CJK text:
  repainted rows are now erased (ECH) before being painted. wtmux's render
  output passes through the host terminal's ConPTY/conhost, which pads any
  bisected double-width character with a space — so overpainting wide glyphs
  whose columns had shifted since the previous frame (e.g. CJK text being
  re-wrapped while a TUI app like Claude Code streams output) corrupted the
  host's copy of the screen even though wtmux's own grid was correct.

• Wide-character overwrite handling in the terminal state:
  writing a wide char whose second cell lands on the lead cell of another
  wide char no longer leaves that char's continuation cell orphaned, and
  overwriting an orphaned continuation cell no longer blanks an unrelated
  neighboring cell (which could erase the wide char written just before it).

• Multi-byte characters split across PTY reads were dropped:
  PTY reads arrive in arbitrary-sized chunks, so a UTF-8 sequence can be cut
  at any byte; the leading bytes are now held until the continuation bytes
  arrive instead of being discarded.

• Wide char landing on the last column was silently dropped:
  it now wraps to the next line, matching how real terminals avoid splitting
  a double-width glyph across the right margin.

• Partial erases could split a double-width pair:
  EL/ECH/ICH/DCH and partial line erases now repair orphaned wide-char
  halves so the row's column accounting always matches the visible glyphs.

• Kitty keyboard pop sequence printed a stray u:
  the < private-prefix byte in CSI < u is now consumed as part of the
  sequence instead of aborting the parse and leaking the final byte.

• Shift+Tab was not forwarded to applications:
  BackTab is now sent as ESC[Z.

Changed

• Per-glyph cursor re-anchoring for non-ASCII runs:
  rows are painted with the cursor re-anchored at each wide or multi-byte
  glyph, so any width disagreement with the host terminal is bounded to a
  single cell and can no longer accumulate across a row or bleed into a
  neighboring pane. Plain ASCII runs are still batched into single writes.