Try it

• Toolbar: click + to add a placeholder; select rows then click the trash.
• Right-click a row or bar for Edit / Add child / Add sibling / Indent / Outdent / Delete.
• Keyboard (focus a row first):
• Delete / Backspace — remove (cascades children)
• Tab — indent under previous sibling
• Shift+Tab — outdent to grandparent
• ↑ ↓ Space Enter — nav / select / open editor
• Inline edit: double-click any cell in the task list.
• Dialog edit: double-click a bar in the timeline.
• Bottom + Add task row inserts a new placeholder at the root.
• Draw a dependency: hover a bar to reveal the two anchor circles at its start/finish edges, then drag from one anchor onto another bar's anchor. Anchor pairs derive the type (right→left = FS, right→right = FF, left→left = SS, left→right = SF). Esc cancels mid-drag.
• Delete a dependency: click the arrow (it turns red and shows a ✕ at the head), then click the ✕ — or press Delete while it's selected.
• Undo / Redo: toolbar Undo/Redo buttons, Ctrl+Z / Ctrl+Y (or ⌘+Z / ⌘+Shift+Z), or the buttons below.
• Cascade modes: children deletes the subtree; orphan keeps children and reparents them to the deleted task's parent. Dependencies touching the deleted task auto-clean — watch the event log.

Event log