[do-md]

Select-all only flagged the terminal state and left the DOM selection to the engine, and the kernel treated Ctrl as an alias of the command modifier. Both assumptions break on macOS WebKit:

• WebKit's native SelectAll collapses to the document tail whenever the editable root's first child is a non-editable overlay -- exactly what hosts portal in (custom caret, remote-cursor layers). The user sees "Cmd+A flashes, then the selection vanishes". Blink is unaffected.
• Ctrl+A/E/N/P/F/B are system text bindings (NSStandardKeyBindingResponding: paragraph start/end, next/previous line, forward/backward). Matching Ctrl+A as select-all hijacked paragraph-start into the terminal state, and the replayed whole-document range then teleported the caret to the top of the document. Ctrl+N/P landed unreliably and fought the arrow keys.

Changes:

• commandKey: split out foreignCommandKey (Ctrl on macOS, Cmd/Win elsewhere). Kernel shortcuts (undo/redo, select-all) now require the primary modifier and opt out on the foreign one, mirroring the @do-md/commands keymap.
• Build the whole-document selection ourselves (selectAllDom_) instead of trusting the engine command: endpoints on the first/last VISIBLE text leaf, because WebKit paints no highlight for a container-endpoint range and blind model coordinates resolve into hidden syntax runs. The DOM write is deferred one macrotask -- WebKit keeps a selection installed inside a preventDefaulted keydown as data but never paints it -- and bails if the terminal state was cancelled in the meantime.
• preventDefault on select-all, which also stops the desktop menu's native selectAll: from reaching the same broken engine command.
• Replay pass: for the terminal state, confirm coverage of the first/last render block and return, otherwise rebuild via selectAllDom_, instead of replaying (uuid, offset) through the leaf-coordinate machinery -- that rebuilt range fought the live selection every pass (the reported flicker).
• Probe the first/last render block (data-render-id) rather than first/lastElementChild: overlay scaffolding is legitimately outside our own selection, so probing it made the echo guard demote the terminal state.
• Flush pending speculative input on the system navigation chords too, like the bare cursor keys: otherwise the armed pending timer wakes up after the caret has moved and writes the stale cursor back.

What this changes

Which layer does this touch?

• Application layer (macOS app, web app, plugins, helper libraries) — MIT
• Editor kernel (.packages/@do-md/core/) — GPL-3.0

How it was verified

Contributor License Agreement

• I have read the CLA and will sign it on this pull request when the
  automated check asks.

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Project	Deployment	Actions	Updated
domd	Ready	Preview	Sep 13, 2026 9:53am UTC