README Template for Open-Source and Internal Projects

Overview

A README is the front door of your project. It’s the first thing developers see on GitHub, npm, PyPI, or Docker Hub, and most of them decide within ten seconds whether to keep reading or hit the back button. A well-structured README answers three questions fast — what is this, how do I install it, how do I use it — and then gets out of the way.

This template gives you a battle-tested skeleton you can copy, adapt, and ship in minutes. It’s built for two audiences at once: humans scanning the repo page, and package registries that render your Markdown with their own quirks (npm and PyPI don’t render it the same way GitHub does — more on that below).

Pair it with the Contributing Guide and Code of Conduct if the project accepts external contributions.

When to Use

Use this template when:

• Starting a new open-source project that needs to attract users and contributors
• Documenting an internal library, CLI, or service that other teams will consume
• Publishing a package to a public registry (npm, PyPI, Docker Hub, crates.io)
• Handing off a project to another team or a new maintainer

You don’t need the full template for throwaway scripts or spike experiments. A three-line README that says what the repo does and how to run it beats a stale full-length one every time — and if the project already has a dedicated docs site, keep the README short and link to it instead of duplicating content.

The Template

Copy the template below and replace the [bracketed] placeholders. Delete the sections that don’t apply — a README with empty boilerplate reads worse than a short honest one.

# [Project Name]

[![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
[![CI](https://github.com/username/repo/actions/workflows/ci.yml/badge.svg)](https://github.com/username/repo/actions)

> [One-line description of what this project does.]

## Table of Contents

- [Overview](#overview)
- [Installation](#installation)
- [Usage](#usage)
- [Configuration](#configuration)
- [Contributing](#contributing)
- [License](#license)

## Overview

[2-3 paragraphs explaining what the project does, why it exists, and who should use it.]

## Installation

### Prerequisites

- [Node.js 20+](https://nodejs.org/)
- [Docker 24+](https://www.docker.com/) (optional, for the containerized setup)

### Quick Start

```bash
# Clone the repository
git clone https://github.com/username/repo.git
cd repo

# Install dependencies
npm install

# Run the project
npm run dev
```

## Usage

```javascript
import { createClient } from 'my-package';

const client = createClient({ timeout: 5000 });
const result = await client.fetch('/status');
console.log(result);
```

## Configuration

| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `timeout` | number | `5000` | Request timeout in milliseconds |
| `retries` | number | `3` | Number of retry attempts |

## API Reference

See [API.md](./docs/API.md) for the full API documentation.

## Contributing

Contributions are welcome. Please read [CONTRIBUTING.md](./CONTRIBUTING.md) before opening a pull request.

## License

[MIT](LICENSE) © [Author Name]

Explanation

Each part of the template exists for a reason — knowing why makes it easier to decide what to cut:

• Name + one-liner: the hook. If the first sentence doesn’t say what the project does, nothing below it gets read.
• Badges: build status, version, and license at a glance. Three to five is plenty; a wall of twenty badges signals noise, not health.
• Table of Contents: worth it once the file passes roughly 200 lines. GitHub already offers an outline button in the UI, so a manual TOC matters most on npm, PyPI, and self-hosted renderers.
• Overview: two or three paragraphs on what it does, why it exists, and who it’s for. Skip the marketing copy.
• Installation: lower the barrier to first success. Prerequisites first, then commands that work when pasted verbatim.
• Usage: one minimal working example. Edge cases belong in the docs, not here.
• API Reference: a link, not a copy. Detailed docs live in /docs or on the docs site so the README stays scannable.
• Contributing: sets expectations for PRs, issues, and code style — link to a dedicated Contributing Guide rather than writing the rules inline.
• License: protects authors and users. No license means “all rights reserved” by default, which legally blocks most usage.

A good one-liner follows a simple shape: what it does, for whom, and what makes it different. “A dead-simple state machine for TypeScript services” tells a reader more than “a modern state-management solution”. If you can’t write the one-liner without buzzwords, the positioning isn’t clear yet — fix that before filling in the rest of the page.

The order matters as much as the sections. Readers scroll top-down and bail early, so the layout front-loads everything a newcomer needs to reach “it runs on my machine”:

Everything above the fold — on GitHub that’s roughly the first 100 lines — should answer “what is it” and “how do I try it”. If a reader has to scroll past an architecture essay to find the install command, the order is wrong.

How to Adapt This Template

Don’t fill the document top to bottom — work in this order:

1. One-liner and overview first. If those two can’t explain the project, nothing else will save it.
2. Installation and quick start next, and verify them on a clean machine or container before writing another line. An install that only works on your laptop is a bug, not a shortcut.
3. A usage example that actually runs — paste it, run it, ship it.
4. Everything else last: configuration tables, badges, contributing links. The first three blocks decide whether a reader stays; an hour spent picking badges before the install command works is optimizing the wrong thing.

Adapt It to Your Registry

The same Markdown renders differently depending on where it’s published. These are the differences that bite people:

GitHub renders the full GitHub Flavored Markdown spec plus a sanitized subset of HTML. Relative links and relative image paths work because GitHub resolves them against the repo. Anchors to headings work automatically, and there’s a built-in outline button for long files.

npm shows the README on the package page but renders it outside your repo context. Relative links (./docs/API.md) and relative image paths break — turn them into absolute URLs, and pin images to a tagged release (https://raw.githubusercontent.com/user/repo/v1.2.0/docs/screenshot.png) so old package versions keep showing the right screenshot. Links into CONTRIBUTING.md or LICENSE should also be absolute.

PyPI renders long_description on the project page using a subset of Markdown. Complex HTML gets stripped, some anchor tricks fail, and a README that renders fine on GitHub can fail the twine check validation with “The description failed to render”. Set long_description_content_type='text/markdown' in your package metadata and run twine check dist/* — or python -m readme_renderer against the file — before every release. Relative links break here for the same reason they break on npm.

Docker Hub doesn’t read the README from the image or repo automatically. You either paste it manually or push it with a tool like docker pushrm; keep the Docker Hub version self-contained because repo-relative links won’t resolve.

The safe default: write the README once with absolute URLs for anything that must work outside GitHub, and keep relative links only for intra-repo navigation that GitHub users rely on.

A Real README Example

This is what the template looks like filled in for an internal service — note how it answers “run it”, “configure it”, and “operate it” in that order:

# Payment Service

Payment processing service for the platform.

## Quick Start

Requirements:
  - Node.js 20+
  - Docker 24+
  - PostgreSQL 16+

Installation:
  git clone https://github.com/company/payment-service.git
  cd payment-service
  npm install
  cp .env.example .env  # edit with your values
  docker compose up -d  # postgres and redis
  npm run db:migrate
  npm run dev

Tests:
  npm test           # unit tests
  npm run test:e2e   # end-to-end tests
  npm run test:cov   # coverage report

## Endpoints

  POST   /payments               Create a payment
  GET    /payments/:id           Get a payment
  POST   /payments/:id/refund    Refund a payment
  GET    /health                 Health check

## Configuration

  Variable          | Required | Default | Description
  ------------------|----------|---------|-------------------
  DATABASE_URL      | Yes      | -       | PostgreSQL URL
  REDIS_URL         | Yes      | -       | Redis URL
  CARRIER_API_KEY   | Yes      | -       | Carrier API key
  LOG_LEVEL         | No       | info    | Log level
  PORT              | No       | 3000    | Server port

## Monitoring

  - Dashboard: https://grafana.company.com/d/payment
  - Alerts: PagerDuty service PD-1234
  - SLO: 99.9% availability, p95 < 500ms

## Contributing

  See CONTRIBUTING.md for the contribution flow.
  Contact: #payments-team on Slack.

Two things worth copying from this example beyond the structure: the env-var table makes the service operable without reading source code, and the monitoring block tells the on-call engineer where to look at 3 a.m. For internal services, those two sections are what turn a README from a formality into an operational document — they overlap with what a Runbook Template covers in depth.

A Minimal README for Small Projects

Not every repo needs the full template. A single-function library, a personal tool, or a small script reads better with a README that fits on one screen:

# clip-fetch

Fetch JSON with timeout and retry baked in. Zero dependencies.

## Install

```bash
npm install clip-fetch
```

## Usage

```js
import { fetchJson } from 'clip-fetch';

const data = await fetchJson('/api/status', { timeout: 3000 });
```

API: `fetchJson(url, options?)` → `Promise<any>`

[MIT](LICENSE)

Eleven lines cover what it does, how to install it, and how to call it — which is all a small utility’s audience needs. The rule of thumb: every section of the full template is optional except what it does, how to install it, how to use it, and the license. Grow the README only when readers start asking questions it doesn’t answer.

Variants

The template is a starting point, not a uniform. What to add and what to skip depends on the project type:

Project Type	Sections to Add	Sections to Skip
Library / SDK	API Reference, Changelog	Screenshots, Monitoring
CLI Tool	Commands, Flags, Shell completions	Architecture
Web App	Screenshots, Demo link, Deploy button	API Reference
Internal Tool	Onboarding, Runbook link, Slack channel	License, Contributing
Monorepo	Package map, per-package README links	Single install section

• Libraries and SDKs live or die by their API docs. Link to a full reference early and keep at least one code example per major feature in the README itself.
• CLI tools should show actual terminal output, not just the command — a five-line transcript of what success looks like removes most “did it work?” issues.
• Web apps benefit from one screenshot above the fold more than any paragraph you could write.
• Internal tools can drop the license and marketing entirely, but they need an owner, a Slack channel, and a link to the onboarding checklist or runbook. Nobody external will ever read it, so write for the teammate who’s debugging it at midnight.
• Monorepos need a map, not an essay: a table linking each package to its own README, plus root-level instructions for the shared toolchain — install once, build everything. Each package README should still stand alone, because consumers of @org/package-x land on its npm page, not on your monorepo root.

What Works

• Keep the first 100 lines scannable — most readers never scroll past the fold, so front-load name, hook, and install.
• Use a demo GIF or screenshot — visual proof beats paragraphs, but keep it under ~2 MB or package pages load slowly.
• Link, don’t inline — detailed docs belong in /docs or the docs site; the README should point to them, not duplicate them.
• Automate the TOC — stale tables of contents frustrate readers; run doctoc or markdown-toc as a pre-commit hook or CI job.
• Test the examples — code snippets that don’t compile erode trust faster than missing docs; run them in CI with a doctest-style job or a script that extracts and executes fenced blocks.
• Link the changelog — users need to know what changed between versions; the Changelog Template gives you a Keep a Changelog-compatible structure.
• Cap the badges — pick the three to five signals a newcomer actually checks (CI, version, license, coverage) and drop the rest.

Common Mistakes

• No installation instructions — the single most common failure; assume the reader has zero context.
• Missing prerequisites — “works on my machine” syndrome; list runtime versions, OS constraints, and required accounts or API keys.
• A wall of text — break long prose into sections, lists, and tables; nobody reads six-paragraph introductions.
• Outdated examples — a code example that fails on paste is worse than no example; wire the README into CI so examples stay honest.
• No license — without one, the project is “all rights reserved” and most companies can’t touch it, let alone contribute.
• Copy-paste from another project — stale repo names, wrong badges, and dead links give away that nobody proofread it.
• Relative links that break outside GitHub — ./docs/api.md and ./images/screenshot.png 404 on npm and PyPI; use absolute URLs for anything a registry renders.
• Badge spam — twenty shields all claiming “build: passing” tell the reader nothing; each badge should earn its row of pixels.

Troubleshooting

• Badges broke after renaming or transferring the repo: shields.io and CI badge URLs still point at the old owner or repo name. Update every badge URL, and check that GitHub’s redirect didn’t mask the problem — badges resolve through the redirect until it expires.
• README renders on GitHub but fails on PyPI: PyPI only supports a subset of Markdown and strips most HTML. Run twine check dist/* before uploading; the usual culprits are <details> tags, complex tables inside lists, and image syntax PyPI’s renderer rejects.
• Links or images 404 on the npm package page: npm renders the README without repo context, so every relative path breaks. Convert links and image srcs to absolute URLs, pinning images to a release tag rather than main so the docs stay version-consistent.
• Table of Contents drifts out of sync: generate it instead of writing it by hand — doctoc README.md or markdown-toc -i README.md in a pre-commit hook keeps anchors honest as sections move.
• README looks fine locally but truncated on the registry: Docker Hub and some registries cap rendered length or field size. Keep the registry-facing README lean and link out to the docs site for the long tail.
• Anchors don’t jump on GitHub: GitHub builds anchors from the rendered heading text — lowercase, spaces as hyphens, punctuation stripped. Non-ASCII characters and duplicated headings produce anchors that differ from what you’d guess; check the actual href in the page source before linking.
• A badge shows a stale or wrong status: GitHub serves badge images through its camo image proxy, which caches them — a badge can lag behind reality for a while after the underlying state changes. Give it time before assuming something is broken, and check the badge URL itself rather than the rendered page.

Keep It Alive

READMEs rot quietly: links die when repos move, examples drift out of sync with the code, badges outlive the CI job they point to. A README that’s wrong is worse than one that’s missing sections, because readers trust it until it burns them once.

• Assign an owner. A CODEOWNERS entry for README.md means doc changes get reviewed by someone who knows the project, not whoever happens to be free.
• Put it in the PR checklist. “Does this change the README?” takes five seconds to answer and catches most drift before it lands.
• Check links in CI. lychee or markdown-link-check running nightly flags dead links and moved anchors without anyone having to remember.
• Review it on a cadence. Once per release or per quarter — whichever lands first. When the project changes shape (internal tool open-sourced, monorepo split, new owner), revisit the whole structure, not just the words.

Pre-Publish Checklist

Before making the repo public or cutting a release, walk this list once — it takes ten minutes and catches most README bugs:

• Install and quick-start steps tested on a clean machine or a fresh container, with no assumed global tools
• Every link and badge resolves to this repo, not the template’s username/repo placeholders
• LICENSE file exists, with the year and copyright holder filled in
• The file renders correctly on every registry you publish to — twine check dist/* for PyPI, a packed tarball preview for npm
• Screenshots and GIFs show the current UI, not a version from two releases ago
• Table of Contents regenerated after the last heading change
• The contact route is real — a Slack channel, issue tracker, or email someone actually monitors
• No leftover [bracketed] placeholders — grep for \[ before tagging the release

Further Reading

• GitHub Flavored Markdown Spec — the exact syntax GitHub renders, including the bits registries don’t support
• Making a PyPI-friendly README — official PyPA guide to long_description and its rendering quirks
• shields.io — badge generator for license, version, CI status, and coverage
• Companion resources — downloadable template file and the filled payment-service example