What Is Technical Documentation, and What Should It Include?

Originally published at https://ninadpathak.com/articles/what-is-technical-documentation-and-what-should-it-include/.

Technical documentation is the material that helps someone understand, use, integrate with, or safely operate a system. It works when a reader can take the next step without guessing.

Think of it as a route through a product. A tutorial gets someone moving, reference answers an exact question, explanation gives a decision context, and troubleshooting helps when the route breaks.

What technical documentation should include

Start with the reader task, not a list of page types. A developer evaluating a product needs different information from someone sending a first API request or investigating an error.

Reader task	Document that owns it	What must be visible	What shows it is enough
Decide whether the product fits	Orientation or README	Scope, non-scope, supported use cases, and a starting link	The reader can name the first relevant path
Complete a first integration	Quickstart or tutorial	Prerequisites, one supported path, expected output, and a failure link	The reader reaches a recognizable result
Understand a system choice	Explanation	Terms, model, constraints, and links to task pages	The reader can explain the choice before implementing it
Change an existing behavior	How-to guide	Starting state, procedure, success state, and recovery boundary	The reader can perform the change safely
Look up an exact question	Reference	Names, types, defaults, constraints, and exceptions	The reader can find the answer without inference
Diagnose a failure	Troubleshooting	Symptom, diagnostic check, cause, recovery, and escalation boundary	The reader can choose the next safe action
Respond to a product change	Release note or migration guide	Impact, required action, version or date, and a migration path	The reader can decide whether action is required

The idea is, one page should not teach a beginner, document every field, explain the architecture, and debug production failures. Split those jobs so each page can answer its question completely.

The Diátaxis framework separates tutorials, how-to guides, reference, and explanation for the same reason. The names help, but the reader task decides whether a page belongs in one category or another.

Build the smallest package that lets someone succeed

A small team does not need seven finished document types before launch. It needs enough material for the first reader to understand the product, finish one supported task, and locate the stable details or recovery guidance that task depends on.

For an API, that often means an orientation page, a quickstart, and reference for the endpoint or SDK used in that quickstart. Add troubleshooting when a failed setup has a meaningful diagnostic path, then add release material when product changes can affect an existing integration.

For a CLI, orientation should explain the tool’s job and supported environments. The quickstart should produce one visible command result, while reference owns commands, flags, exit behavior, and configuration.

An internal platform may need a different starting package. Access, a supported setup path, ownership, and the operating rules that change a team’s next action can matter before a public-style product portal.

Use the internal vs. external documentation decision when the same subject needs both private operating context and a public task-focused treatment.

Google’s technical writing guidance recommends defining scope, non-scope, and audience before expanding a draft. That decision keeps a page from collecting unrelated jobs as it grows.

Give each document a boundary

An orientation page helps a reader decide where to begin. It should answer what the product does, who it is for, what it does not cover, and where the first supported task starts.

A quickstart proves one supported path. It should link to reference when exact options matter and to troubleshooting when a failure would block the first result.

An explanation page gives a model for a design choice. It should make the next task easier without forcing the reader to learn every concept before they can do useful work.

A how-to guide changes one behavior from a known starting state. Keep details that remain stable across many tasks in reference, and keep recurring failures in troubleshooting.

Reference owns the public API surface. Google’s API reference guidance calls out methods, parameters, returns, and exceptions because implementation depends on exact behavior rather than narrative approximation.

Troubleshooting starts from a recognizable symptom and gives a diagnostic check, likely cause, safe recovery, and escalation boundary. A generic support link cannot tell someone whether a retry is safe.

Release notes explain changed behavior and required action. They should link to the canonical guide or migration page instead of repeating every instruction.

Make coverage inspectable before writing prose

A document list can hide missing ownership. I ran a small documentation deliverables manifest for a webhook API example so every planned page has one reader task, success signal, owner, review trigger, and deferral condition.

.venv/bin/python static/templates/validate_documentation_deliverables.py

The validator passed with seven owned reader tasks. That result does not tell you whether every paragraph is good, but it does expose a missing task owner before a repository fills with overlapping pages.

Documentation deliverables manifest validation

<img src="/static/images/articles/what-is-technical-documentation-and-what-should-it-include/documentation-deliverables-manifest.png?v=0c2f9fe6" alt="Terminal output showing a documentation deliverables manifest with seven owned reader tasks passed validation">

The validator checks each planned deliverable for a reader task, completion signal, owner, update trigger, and deferral condition.

Use this kind of check before writing a documentation site from scratch. It is planning evidence, not a replacement for task testing, source checks, or editorial review.

Assign an owner and an update trigger

A review date alone does not keep documentation current. Give each deliverable an owner and a product change that requires review, such as a schema change, permission change, new release behavior, support issue, or incident.

GitLab’s documentation guidance treats documentation as maintained product material for configuring, using, and troubleshooting a system. Update the page when product behavior makes its existing instructions unsafe or incomplete.

A useful review trigger connects the document to the change that can invalidate it. A schema change should prompt reference review, a revised onboarding flow should prompt quickstart review, and a recurring failure should prompt troubleshooting work.

Use a technical documentation template when you are ready to turn these decisions into a repository. Then test whether a page helps someone finish a task before calling it complete.

Use the documentation review checklist before publication. If duplicate or stale answers are the problem, start by organizing documentation that has drifted instead of adding another page.