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Dev tools · March 7, 2026

SV

Safelaunch – Validates your environment before you push to production

It works on my machine" is still the most common deployment bug I kept running into the same stupid deployment issue. Everything works locally. Tests pass. I deploy. Production crashes. After digging through logs for an hour the problem ends up being something simple like: • a missing environment variable • something added to .env.example but not to .env • a config mismatch between environments The most common one for me was forgetting to add a variable locally after adding it to .env.example. So I built a small tool to catch this instantly. It compares .env and .env.example and tells you if…

Visit npmjs.comAlternativestop 17% of March 2026

What it does

In the maker’s words, at launch

It works on my machine" is still the most common deployment bug I kept running into the same stupid deployment issue. Everything works locally. Tests pass. I deploy. Production crashes. After digging through logs for an hour the problem ends up being something simple like: • a missing environment variable • something added to .env.example but not to .env • a config mismatch between environments The most common one for me was forgetting to add a variable locally after adding it to .env.example. So I built a small tool to catch this instantly. It compares .env and .env.example and tells you if something required is missing before deployment. Example output: deploycheck running... Missing variables: - DATABASE_URL - REDIS_URL Fix the issues above before deployment. The idea is basically a spell checker for backend configuration mistakes. Instead of finding out after deploy, it catches the issue while you're still working. Right now it can: • detect missing environment variables • run locally as a CLI • run in CI as a check before deployment I’m trying to figure out if this is actually useful outside my own workflow. Curious if others run into this problem as often as I do.

Does the same job

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