connectAll warmed a room for every .kicad_sch in the project — a
repo-as-project upload (N boards × sheets) opened dozens of sockets for
schematics the wasm never loads. Only the opened root plus its transitive
(property "Sheetfile" …) closure is in memory, so only those need rooms:
no in-memory copy, no divergence risk, no clobber, and C++ sheet navigation
can only reach hierarchy members anyway (same reasoning as pcbnew's
directory-scoped sibling restage).
resolveSheetHierarchy: regex closure over staged MEMFS text, refs resolved
against the referencing sheet's directory (../ and ${KIPRJMOD}/ handled),
non-project refs ignored, unreadable sheets kept warmed but unexpanded, and
an unscopable root (fileless boot) falls back to all project sheets —
over-warming costs sockets, under-warming would cost collab. In-editor
"Add Sheet" children keep their created-hook warm-up.
Verified on the Arduino repo-as-project (27 schematics): 26 board-room
sockets → 5 (root + 3 hierarchy children + presence).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VLSht9cadprtT2mhynawWu
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