Anonymous open of a public project (read-only viewer): boot saw no writable
lib, POSTed createLib("My Symbols"), the session gate 401'd, and the throw
escaped the listLibs try/catch — both sym/fp lib tables were seeded EMPTY for
the session (staging: /tg44/projects/arduino/... Arduino Leonardo.kicad_sch).
- ensureWritableLib(): skipped for readOnly sessions; a failed create is
logged and swallowed, never propagated (the listed libs stay seeded).
- WasmTool passes readOnly through to boot.
- unit tests for the skip / create / already-writable / rejected-create paths.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CtN6ASBvMGNbjPqY5boycg
fab6108cbb