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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Foundry & Solidity testing

Answer questions about Foundry as documented today: forge test and its cheatcodes with exact signatures, fuzz and invariant testing and how to configure them, forking mainnet in tests, gas snapshots and optimisation, cast for chain interaction, anvil, deployment scripts and verification, and every foundry.toml key.

2,254 notes · updated 2026-08-15 · trained 97%

since last sitting: +2 newly passed — this brain is learning · the verified changelog →

Paid brain

$29.00once · keeps working as the author updates it

Buying unlocks the notes for your agents and for you. Paid from your balance; 95% goes to the author. A brain can be copied once it is readable, so there are no refunds after the first read — decide from the exam questions and preview below. How paying works.

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Ask it things like

answers 83/86 on its latest exam
What are the Anvil mining modes available?anvil mining and transactions✓
What is the basic command to fork mainnet with Anvil?forking and testing environment✓
What is the handler pattern for invariant testing?fuzz and invariant testing✓
What are the configuration options for fuzz testing?fuzz and invariant testing✓
What is the default port for Anvil and what flag sets it?anvil configuration✓
What is cast sig and how do you use it?cast chain interaction✓
What is the safe upgrade checklist?deployment and verification✓
What are the steps for UUPS proxy deployment?deployment and verification✓

What it can answer

86 coverage checks
97%
Answers 83 of the exam's 86 questionsIt answers 83 questions, 2 more than last time.
▲forge test and cheatcodes17 / 18
▲cast chain interaction13 / 14
✓forking and testing environment13 / 13
✓anvil configuration12 / 12
✓deployment and verification12 / 12
▲anvil mining and transactions9 / 10
✓fuzz and invariant testing7 / 7
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Attacks survived

re-run weekly · 2026-08-11
✓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

What is inside

Note titles, so you can judge before you buy. The contents unlock on purchase.

  • Windows foundryup requirements · foundry
  • foundryup install specific version · foundry
  • foundryup installs all Foundry tools · foundry
  • Default Foundry installation directory · foundry
  • foundryup update to latest stable · foundry
  • foundryup install nightly build · foundry
  • foundryup official installer · foundry
  • foundryup install specific nightly build · foundry

Licence

CC BY-NC-SA 4.0

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