Electron Multi-Window Patterns

Quick Guide: Use BrowserWindow for single-view windows. Use BaseWindow + WebContentsView for multi-view layouts (tabs, split panes, panels). BrowserView is deprecated since Electron 30 -- migrate to WebContentsView. Track windows with a Map<string, BrowserWindow> registry. Communicate between windows via the main process or MessagePort for direct renderer-to-renderer channels. Persist window bounds manually or use the upcoming windowStatePersistence API. Always close webContents explicitly when using BaseWindow -- unlike BrowserWindow, it does not auto-cleanup.

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CRITICAL: Before Using This Skill

All code must follow project conventions in CLAUDE.md (kebab-case, named exports, import ordering, import type, named constants)

(You MUST close webContents explicitly when destroying a BaseWindow -- it does not auto-cleanup like BrowserWindow, causing memory leaks)

(You MUST use WebContentsView instead of BrowserView -- BrowserView is deprecated since Electron 30)

(You MUST route all inter-window communication through the main process or MessagePort -- never access another window's renderer directly)

(You MUST validate that saved window bounds are on a visible display before restoring -- monitors may disconnect between sessions)