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12/65
Lesson 12
8 min
UBS: Code Quality Guardrails
Catch bugs before they reach production
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Catch bugs before they reach production
Mark complete to track your learning progress.
Learn to catch bugs before they reach production with UBS.
UBS (Ultimate Bug Scanner) is your safety net before every commit. It scans your code for common bugs, security issues, and anti-patterns that might slip through during development.
Think of it as a code review bot that catches issues in seconds, not hours.
XSS, injection, and OWASP vulnerabilities
Null safety, async/await, type issues
Scan a file in under 1 second
TypeScript, Python, Rust, Go, and more
Run ubs before every commit.
Exit 0 = safe to commit. Exit >0 = fix issues first.
ubs file.ts runs in under 1 second, while ubs . may take 30+ seconds.UBS output follows a consistent format:
⚠️ Null Safety (3 errors)src/api/users.ts:42:5 – Possible null dereference💡 Use optional chaining: user?.profilesrc/api/users.ts:87:12 – Unchecked array access💡 Add bounds check before accessing array[i]⚠️ Security (1 error)src/api/auth.ts:23:8 – SQL injection risk💡 Use parameterized queries instead of string concatExit code: 1
file:line:col→Exact location of the issue\ud83d\udca1→Suggested fixExit code 0/1→Pass (safe) / Fail (needs fixes)Always fix immediately
Fix before production
Use judgment
ubs src/utils/helpers.tsClean Code Scenario
A well-written file passes with zero findings
For maximum safety, add UBS to your pre-commit workflow:
1# In your workflow:2$ git add .3$ ubs $(git diff --name-only --cached)4# If exit 0: proceed with commit5# If exit 1: fix issues first67$ git commit -m "feat: add user auth"
ubs automatically before committing. You get this protection by default!1# View session logs2$ ubs sessions --entries 134# Scan your project5$ ubs .67# Get help8$ ubs --help