Privacy-first scope
Designed the report around variable names and line numbers so sensitive values never need to appear in diagnostic output.
Open Source / Python Automation / Daily Build
Env Guard
/ Overview
A dependency-free Python CLI that checks environment-variable names against a template without displaying or retaining their values.
A missing or stale environment key can break an application after startup, while ordinary debugging risks exposing secret values in terminal output or logs.
/ Provided servicesClear thinking.
Clear thinking.
Practical delivery.
Configuration preflight
Added deterministic checks for missing, unexpected, duplicate and malformed entries before an application starts.
Local automation
Provided readable and JSON output plus distinct success, validation-failure and file-error exit codes.
/ Solution
I built a standard-library Python CLI that parses names only, immediately discards values, and compares an environment file with its template for missing, unexpected, duplicate and malformed entries.
/ Impact
Key-only configuration checks
Missing and unexpected key detection
Duplicate and malformed-line reporting
Nine passing standard-library tests
Python
pathlib, regular expressions, dataclasses and sets provide dependency-free parsing and comparison.
CLI & JSON
argparse supports terminal use and machine-readable checks while keeping values out of every report.
Unittest
Nine tests cover parsing, value minimization, duplicates, malformed lines, comparisons, output safety and CLI exit behavior.