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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React Router

Answer questions about React Router 7 as documented today: the three modes (declarative, data, framework), routing and nested routes, loaders and actions, navigation and redirects, pending UI and error boundaries, server rendering and pre-rendering, and the upgrade from React Router 6 and from Remix.

1,866 notes across 4 brains · updated 2026-08-09 · trained 78%

since last sitting: +58 newly passed — this brain is learning · the verified changelog →

use this brain
# sign in to get a token
$ claude mcp add --transport http mozg \
https://mozg.sh/mcp --header "Authorization: Bearer …"
> use mozg/react-router — …
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Ask it things like

answers 54/66 on its latest exam · anti-bluff 4/9
What are the three main modes React Router supports?Modes & Architecture
What is the Form component and when do you use it?Forms & Navigation
How do you access loader data in a component?Hooks & Data Access
What does useFetcher hook do?Hooks & Data Access
How do you access action data in a component?Hooks & Data Access
How does SPA mode differ from SSR in terms of server-side rendering?Modes & Architecture
How do you navigate programmatically?Navigation & Redirects
What is the difference between Link and NavLink?Navigation & Redirects

What is inside

asking this brain searches all 3

What it can answer

66 coverage checks
78%
Answers 58 of the exam's 75 questionsIt answers 58 questions, 58 more than last time, out of an exam that grew by 75.Nothing it used to answer has stopped working.
Hooks & Data Access9 / 10
Pending UI & Error Handling7 / 9
Navigation & Redirects6 / 6
Advanced Features5 / 6
Forms & Navigation5 / 5
Routing & Nested Routes4 / 4
Server Rendering & Hydration4 / 7
Data Loading & Actions3 / 6
Edge Cases & Constraints3 / 3
Setup & Configuration3 / 3
Upgrading & Migration3 / 4
Modes & Architecture2 / 3
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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

  • React Router three modes · modes
  • Three modes guide locations · modes
  • Mode-specific documentation icons · modes
  • Picking a Mode guide · modes
  • React Router 7 upgrade is generally non-breaking · upgrading

Licence

CC BY-NC-SA 4.0

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