Configuration & Environment Packages
Configuration loading and environment-variable management libraries for keeping app settings and secrets out of source code (dotenv, python-dotenv).
Packages in Configuration & Environment
Kind
Sort:Used by Most Apps
envy
Deserialize environment variables directly into typesafe Rust structs using Serde.
unconfig
A universal solution for loading configurations for tool authors
Laravel Pennant
A simple, lightweight feature-flag package for Laravel applications
jsonargparse
Build Python CLIs and configuration from type hints, config files, and environment variables with minimal effort.
hjson-js
A human-friendly JSON superset with comments, quoteless strings, and optional commas — parse and stringify config files without sacrificing readability.
read-package-up
Read the closest package.json file, with normalized data and helpful JSON parse errors.
deepmerge
A lightweight, strategy-based library for deeply merging nested Python dictionaries, lists, and sets.
confection
A lightweight, type-checked configuration system for describing trees of Python objects
pytoml
A strict, specs-conforming TOML 0.4.0 parser and writer for Python.
python-sdk
Vendor-agnostic feature flagging API for Python, letting you swap flag providers without touching call sites.
OpenFeature LocalStorage Provider
An OpenFeature provider that resolves feature flags from the browser's localStorage for instant client-side overrides.
flagsmith-js-client
The official JavaScript and React Native client SDK for Flagsmith, the open source feature flag and remote configuration platform.
configparser
A backport of Python's modern ConfigParser to older Python versions, kept in sync with CPython upstream.
Matomo Ini
A PHP library to read and write INI configuration files with real typing and exceptions.
laminas-config-aggregator
A lightweight PHP library for collecting and merging application configuration from multiple providers and formats.
platform-dirs
A Rust library for resolving platform-dependent application and user directory paths.
python-jproperties
A Java Properties file parser and writer for Python, with metadata, docstrings, and full Unicode escape support.
deser-hjson
A Serde deserializer for Hjson, the human-friendly configuration variant of JSON.
configcat-js
Official JavaScript SDK for evaluating ConfigCat feature flags and remote config values directly in the browser.
@oclif/config
The legacy base config object and standard component interfaces for the oclif CLI framework.
subst
Shell-like $VAR and ${VAR:default} variable substitution for Rust strings, byte strings, and JSON/TOML/YAML documents.
python-iniparse
A drop-in ConfigParser replacement that preserves comments, order, and formatting when editing INI files.
flagsmith-engine
The core Python engine that powers Flagsmith feature-flag and segment evaluation.
netrc-rs
A lightweight Rust library that parses .netrc files into typed host, login, and macro structs.
