AI Prompts for Technical Documentation

Prompts for writing README files, API documentation, architecture notes, onboarding docs, and technical explanations.

Who These Prompts Are For

Developers, technical writers, engineering teams, and product teams who need documentation that actually exists and stays useful. These prompts help you write READMEs, API docs, architecture notes, onboarding docs, and changelogs.

How to Use These Prompts

Copy any prompt into ChatGPT, Claude, Gemini, or another AI tool. Paste the real code, structure, or notes, and replace placeholders like [project] and [reader]. Verify accuracy before publishing, AI can fill gaps with plausible-but-wrong details.

README Prompts

Write a README:

Write a README for this project.

What it is: [describe]. What it does: [features]. How to install/run: [steps]. Tech stack: [list]. Audience: [users/developers].

Structure: title, short description, features, installation, usage with examples, configuration, and contributing/notes. Clear and scannable. Don't invent steps I didn't give you — flag gaps.

Improve an existing README:

Here's my current README: [paste].

Improve it: better structure, a clearer description, missing sections (installation, usage, examples), and anything confusing. Keep the accurate content; flag anything that looks outdated or unclear so I can confirm.

Write a quickstart section:

Write a quickstart for [project] so a new user can get it running fast.

Setup info: [paste]. 

Give the minimal steps from zero to working, with copy-paste commands and what success looks like at each step. Keep it short — the goal is a fast first win.

API Documentation Prompts

Document an API endpoint:

Document this API endpoint.

Endpoint: [method + path]. Purpose: [describe]. Parameters: [list]. Request/response: [paste examples or schema]. Auth: [describe].

Output clear docs: description, parameters (with types and required/optional), an example request and response, error responses, and notes. Match a clean API-doc format.

Generate API reference from code:

Here's my [language] API code: [paste].

Generate reference documentation: each endpoint/function, its parameters, return values, and an example. Flag anything ambiguous where I need to clarify intent rather than guessing.

Write API usage examples:

Write usage examples for this API: [describe endpoints or paste]. 

Give practical examples for common use cases — the request, the response, and a short note on what's happening. Use [language] for client examples if relevant. Make them copy-paste ready.

Architecture Prompts

Explain the architecture:

Help me document the architecture of [project/system].

Components: [list]. How they interact: [describe]. Tech: [stack]. Key decisions: [any].

Write an architecture overview: the components and their responsibilities, how data/requests flow, and the main design decisions with their rationale. Clear for a new engineer. Suggest where a diagram would help.

Write a design decision record:

Document this technical decision: [describe what was decided and the context].

Output an ADR-style record: the context/problem, the options considered, the decision, the consequences, and the date. Concise and neutral so future maintainers understand why.

Onboarding Prompts

Write developer onboarding docs:

Write onboarding docs for a developer joining [project].

Setup: [steps]. Codebase structure: [describe]. Key concepts: [list]. Workflow: [how we work].

Cover: getting set up, the lay of the codebase, key concepts, the dev workflow, and where to get help. Friendly and not overwhelming — order it for someone's first week.

Explain the codebase structure:

Explain this codebase structure for a newcomer: [paste folder/file structure or describe].

For each main directory/module: its purpose and what lives there. Highlight the entry points and where to start reading. Keep it oriented around "where do I find/change X."

Cleanup Prompts

Write a changelog entry:

Write a changelog entry for these changes: [describe what changed].

Group into Added / Changed / Fixed / Removed as relevant, with concise user-facing descriptions. Match the [Keep a Changelog] style. Include the version/date placeholder.

Improve unclear documentation:

Here's documentation that's confusing or outdated: [paste].

Rewrite it for clarity and correctness: better structure, plain language, and concrete examples. Flag anything that seems outdated so I can verify before publishing. Keep the accurate substance.