new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →
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explore / Web & frontend / mozg / Electron

Electron · Tutorial

Answer questions about building an Electron app: process model and context isolation, IPC, the security checklist and why each item exists, packaging, code signing, distribution and auto-update, performance and native modules.

1,011 notes · updated 2026-08-14 · trained 90%

since last sitting: +36 newly passed — this brain is learning · the verified changelog →

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$ claude mcp add --transport http mozg \
https://mozg.sh/mcp --header "Authorization: Bearer …"
> use mozg/electron-tutorial — …
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Ask it things like

answers 35/39 on its latest exam · anti-bluff 1/1
What is the difference between ipcRenderer.send and ipcRenderer.invoke?IPC Communication✓
What is the security purpose of context isolation?Process Model & Context Isolation✓
What is the purpose of contextBridge?Security: Context Isolation & Sandboxing✓
What is a preload script and when does it execute?Security: Context Isolation & Sandboxing✓
What is the autoUpdater module used for?Auto-Update & Release Management✓
What method on ipcMain handles invoke requests from renderer?IPC Communication✓
What is an unsafe pattern when using contextBridge?IPC Communication✓
How does MessageChannelMain enable direct renderer-to-renderer communication?IPC Communication✓

What it can answer

39 coverage checks
90%
Answers 36 of the exam's 40 questionsIt answers 36 questions, 36 more than last time, out of an exam that grew by 40.Nothing it used to answer has stopped working.
▲IPC Communication6 / 7
▲Process Model & Context Isolation5 / 6
✓Performance Optimization4 / 4
▲Security: Fuses & Hardening4 / 5
✓Packaging & Distribution3 / 3
✓Security: Context Isolation & Sandboxing3 / 3
✓Auto-Update & Release Management2 / 2
▲Native Modules2 / 3
✓Security: ASAR Integrity2 / 2
✓Security Checklist Gaps2 / 2
✓Security: Code Signing2 / 2
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Attacks survived

re-run weekly · 2026-08-10
✓gate-battery12/12 known hostile payloads caught by the ingest gate
✓injection-corpusevery active note scanned — no steering language
✓secret-corpusevery active note scanned — no keys or credentials

heuristic scans against known attack classes — measured and dated, not a promise of unpoisonability

Inside

  • process.contextIsolated property indicates context isolation · process model & context isolation
  • process.parentPort for UtilityProcess communication · ipc communication
  • process.defaultApp property · process model & context isolation
  • process.sandboxed property indicates renderer sandbox status · process model & context isolation
  • process.type property values · process model & context isolation
  • process.contextId property · process model & context isolation
  • process.getCPUUsage returns CPU usage data · performance optimization
  • Sandboxed renderer process API subset · process model & context isolation
  • process.hang causes main thread hang · process model & context isolation
  • process.crash causes main thread crash · process model & context isolation
  • process.setFdLimit sets file descriptor limit · process model & context isolation
  • process.getCreationTime returns process creation time · process model & context isolation
  • process.takeHeapSnapshot creates V8 snapshot · performance optimization
  • process.getHeapStatistics returns V8 heap data · performance optimization

Licence

CC BY-NC-SA 4.0

Use it, copy it, build on it, with credit. Selling it is not allowed.