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@schemastud/mainframe

v0.1.0

Published

The generic Mainframe engine (React-only, host-agnostic): the frozen slot contract, an SSR-safe named-slot registry, a mode registry, a `can`-gated resolver, and the host→Mainframe React delegation seam. Relocated out of @splicewire/beam-mainframe (Frame

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Maintainers

stephenr85stephenr85stephenrushingstephenrushing

Keywords

Readme

@schemastud/mainframe

The generic Mainframe engine — React-only, host-agnostic. The frame that hosts realm/CMS/OS surfaces without knowing what they are.

Relocated here out of @splicewire/beam-mainframe (Frame OS ADR-0011, ticket 01) so any host composes the frame with no CMS and no beam dependency. @splicewire/beam-mainframe re-exports these primitives, so existing consumers are unchanged until they migrate their import sites (ticket 02).

What ships here (the generic seam)

  • The slot contract (contract.ts) — the frozen CORE_SLOTS/OPTIONAL_SLOTS, fill-types, zones. Changing the core set or a core slot's fill-type is a contract break; adding an optional/custom slot is not.
  • createSlotRegistry — an SSR-safe, append-only, per-scope bag of slot contributions.
  • createMainframeRegistry — register(mode, Mainframe); a Mainframe is a ({ slots, ctx }) => ReactNode that owns placement.
  • resolveSlots — collects raw contributions into ResolvedSlots, applying the two orthogonal axes: entitlement (can, drops contributions) and placement ordering ((zone, order, index)).
  • The React seam (react.tsx) — MainframeProvider / MainframeOutlet / useSlot + hooks: a child-swap-under-a-stable-host delegation that preserves state across mode switches.

What does NOT ship here

The CMS-authoring layer stays in @splicewire/beam-mainframe: createMainframeHost, the domain/window modes, useBeamUxEntry, isPuckBody, edit-affordance contributions. The Frame OS os mode + window manager (tickets 03–04) are added to this package on top of the seam.

The geometry atom

This package declares react-rnd (MIT) as a dependency — the invisible geometry atom for the Frame OS window frame (ticket 03). It is imported only at the window-frame component; the reducer, registry, and realm-derivation stay import-free (guarded), keeping the geometry wheel swappable.