Salesforce Apex Quality Guardrails

Apply these checks to every Apex class, trigger, and test file you write or review.

Step 1 — Governor Limit Safety Check

Scan for these patterns before declaring any Apex file acceptable:

SOQL and DML in Loops — Automatic Fail

// ❌ NEVER — causes LimitException at scale
for (Account a : accounts) {
    List<Contact> contacts = [SELECT Id FROM Contact WHERE AccountId = :a.Id]; // SOQL in loop
    update a; // DML in loop
}

// ✅ ALWAYS — collect, then query/update once
Set<Id> accountIds = new Map<Id, Account>(accounts).keySet();