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wtf is confidence?

kelseyhightower/confidence — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2016-01-16

29GoAudience · developerComplexity · 2/5DormantSetup · easy

TL;DR

A sample Go app that demonstrates different ways to configure software, like environment variables, files, or command-line flags, so developers can learn the patterns.

Mindmap

mindmap
  root((repo))
    What it does
      Config demo
      Multiple sources
      Reference app
    Tech stack
      Go
    Use cases
      Learn config patterns
      Compare approaches
      Adapt to own project
    Audience
      Developers
      Go learners

Code map

Detail Auto

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filefunction / class

Why would anyone build with this?

REASON 1

Study different ways to load app configuration in Go.

REASON 2

Compare env vars, files, and CLI args side by side.

REASON 3

Use as a reference when structuring config for a new service.

What's in the stack?

Go

How it stacks up

kelseyhightower/confidencedevelopersdigest/aws-ec2-cuda-ollamaivngineer/sword
Stars293030
LanguageGoGoGo
Last pushed2016-01-162024-08-03
MaintenanceDormantStale
Setup difficultyeasyhardmoderate
Complexity2/54/53/5
Audiencedeveloperops devopsdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · easy Time to first run · 30min

Wtf does this do

Confidence is a sample application that shows different ways to handle configuration in modern software. Configuration is the way an app knows key details about its environment, things like which database to connect to, what port to run on, or whether it's in testing or production mode. Instead of hardcoding these details directly into the program, well-built apps read them from outside sources so the same code can run in different places without changes. This project exists to demonstrate the various options developers have for managing that setup. Modern apps can pull configuration from several places: environment variables, files on disk, command-line arguments, or remote services. The application serves as a working reference for how these approaches look in practice, giving developers something concrete to study rather than just reading documentation. Someone learning how to structure configuration for their own application would find this useful. For example, a developer building a web service might wonder whether to use a config file, environment variables, or a combination of both. By examining this sample, they can see a real implementation and adapt the pattern to their own project. It is essentially a teaching tool rather than something you would deploy to serve real users. The README doesn't go into much detail about which specific configuration methods are demonstrated or how the application is structured internally. What it does make clear is that this is an example project, meant to be read and learned from rather than used as a production tool. It's written in Go, so it will be most approachable for people working in that language, though the general concepts around configuration apply broadly across most programming languages.

Yoink these prompts

Prompt 1
Explain how this Go project demonstrates different configuration approaches.
Prompt 2
Show me how to adapt the config pattern in kelseyhightower/confidence for my own Go web service.
Prompt 3
Walk me through the tradeoffs between environment variables and config files as shown in this repo.

Frequently asked questions

wtf is confidence?

A sample Go app that demonstrates different ways to configure software, like environment variables, files, or command-line flags, so developers can learn the patterns.

What language is confidence written in?

Mainly Go. The stack also includes Go.

Is confidence actively maintained?

Dormant — no commits in 2+ years (last push 2016-01-16).

How hard is confidence to set up?

Setup difficulty is rated easy, with roughly 30min to a first successful run.

Who is confidence for?

Mainly developer.

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