Sheet

The one drawer: floats over the region (never reflows the layout), full takeover under 700px, a lens on the armed object with crossfade swap, resizable handle with keyboard path, lens/focus postures remembered per key.

npx candlelight-ds add sheet

Use when

Editing or inspecting the thing selected from an adjacent list.

Don't use when

Blocking decisions (Overlay) or whole workflows (a route).

States

closedopen lens (340px)open focus (560px+)takeover (<700px container)dragging the handlecontent swapping (120ms crossfade)

Keyboard

• Escsteps focus → lens → closed
• ←/→ on the handlenudges width 16px

Traps

• Cold-mount focus: focus the title only after the panel exists (key the effect on mounted, not just open).
• Focus steal: the title-focus effect must never depend on callback props — an unstable onClose would re-fire it on every continuous save.

Acceptance

• The layout behind never reflows (push mode is dead).
• Arming a different object swaps content in place — the drawer does not close/reopen.
• The handle is a citizen: role=separator, focusable, ←/→ nudges, width remembered per key per posture.
• Closing is announced with Undo when local state dies, never blocked by a dialog.

Raw twin: /components/sheet.md·Registry item: /r/sheet.json