Same shape as wall milestone B — thin renderer + system re-export, no
geometry / floor-plan / tool ports yet (later milestones). Feature flag
NEXT_PUBLIC_USE_REGISTRY_FOR_FENCE gates the dispatch flip.
Files added (packages/nodes/src/fence/):
- schema.ts: re-exports FenceNode from core.
- parametrics.ts: dimensions / posts / style fields for the auto-
inspector. Endpoints + curveOffset edited via tools, not in
parametrics.
- feature-flag.ts: mirrors the wall flag pattern.
- definition.ts: capabilities (snappable + surfaces sides +
selectable + duplicable + deletable), relations (linkedBy
endpoint-match, no hosts, no affectsSpatial — matches legacy),
parametrics, renderer, system, toolHints (Left click / Shift /
Esc — fence has no helper file today so this adds a panel where
there wasn't one). Tool field absent: fence has 4 tools (build,
curve, move, move-endpoint) wired through editor state, not the
registry dispatch — they keep running unchanged.
- renderer.tsx: thin placeholder mesh + markDirty on mount + node
events + DEFAULT_STAIR_MATERIAL (matches legacy material reuse).
Verification log fires once on first mount.
- system.tsx: re-exports the legacy FenceSystem from viewer.
Verification log on mount/unmount confirms the bundle activates.
- index.ts: barrel.
Files changed:
- packages/viewer/src/index.ts: new exports for FenceSystem and
DEFAULT_STAIR_MATERIAL so the @pascal-app/nodes bundle can
compose them without reaching into viewer internals.
- packages/viewer/src/components/renderers/fence/fence-renderer.tsx:
paired one-shot legacy verification log so the dispatch path is
unambiguous from the browser console.
- packages/nodes/src/index.ts: conditional fenceEntries appended to
builtinPlugin.nodes based on isFenceRegistryEnabled. With the flag
off (default), behavior is unchanged; with it on, Phase 0 shims
switch fence to the registry path — legacy <FenceRenderer> and
<LegacySystem kind="fence"><FenceSystem /></LegacySystem> short-
circuit, the bundled system.tsx re-mounts FenceSystem via
RegisteredSystems, and the new renderer takes over the dispatch.
No behavior change with the flag off. With it on, behavior should be
byte-identical (same FenceSystem code, same priority, same geometry
path).
Phase 5 batch order continues with slab / ceiling / door / window /
item / etc. as flagged migrations after fence parity signs off.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
