documentation
Documentation is a written description that accompanies a piece of software: it explains what the program is for, how to use it, and how it is built internally.
In plain terms
Documentation is both the software's user manual and its blueprint. Like a washing machine's instruction booklet combined with a house's architectural plan: one shows which button to press, the other reveals where the wires run inside the walls.
It is prepared for several types of readers. The user looks for how to achieve what they want; the developer for how to connect the program with another; the operator for what to do if something breaks.
In the AI era, there is a new reader: the machine. A coding agent gathers information from descriptions just like a new colleague, so guides specifically designed for agents are now being created, explaining a project's rules and how to work within them.
What distinguishes it from the program itself: the code records what the machine does, while the documentation explains why and how it should be used. A good program can be unusable if no one knows how to handle it.
How it works
- The creators describe what the software is for and how to launch it; this is usually a short introductory file, the README.
- This is accompanied by materials for various purposes: step-by-step tutorials, task-solving guides, precise references on features, and background explanations on decisions.
- The description is often stored alongside the code, versioned in the same way, making it traceable which text belongs to which program version.
- Part of the reference is generated by programs from comments written in the code, while the text is increasingly drafted with AI assistance, requiring human review.
- While working, an AI agent reads descriptions and decides which tool to use and how based on them; if the description is inaccurate, the agent can easily make mistakes.
An everyday example
A new invoicing program has been introduced at your workplace, and you can't find how to cancel an invoice. You open the help pages or ask the program's built-in AI assistant; ideally, either way, the answer draws on the documentation. If the documentation is outdated, it will send you to the wrong button.
Who is affected
A common misconception
Limits and risks
- Documentation becomes outdated easily: the program changes while the description remains, and the old guide can be worse than having none.
- AI-generated descriptions sound plausible even when describing non-existent features or incorrect settings, so always compare them with reality.
- An agent may follow what is written as instructions, so a faulty or maliciously written document can lead it to take the wrong steps.
- A lot of text does not mean good documentation: if you cannot quickly find the answer in it, it does not fulfill its role.
Similar, but not the same
- code comment – A comment is a short note attached to a part of the code, while documentation is a standalone material presenting the entire program.
- Specification – The specification predefines what must be completed, while the documentation describes what was completed and how to use it.
- prompt – A prompt is a momentary instruction to the AI for a specific task, while documentation is lasting, reusable knowledge.
Related concepts
software development, knowledge management
README, API documentation, user manual, technical documentation
code repository, version control, API, coding agent, kontextus
A brief history
Software documentation is as old as programming: printed manuals were provided for computers from the start. With the spread of the internet, descriptions moved to the web, and since the emergence of large language models, they are also prepared for machine readers.
Where things stand
At the end of 2026, documentation is a self-evident part of software development, and it is changing in two directions: an increasing share is written with the help of AI, and more and more is created specifically for agents. Its quality strongly influences how reliably agents work.
In the news
- Epic to keep AI transparency tools despite federal rollbackOct 30, 2026 · Health
- Study: AI scribes speed up documentation but did not raise productivityOct 26, 2026 · Health
- AI scribes save doctors time but do not fix physician burnout, analyses sayOct 20, 2026 · Health
- Industrial Equipment News: manufacturers need AI-driven decision workflows, not more pilotsOct 12, 2026 · Ipar
- Blue Cross report says AI raises healthcare costs; hospitals dispute itOct 5, 2026 · Health
- VA signs $775 million contract to bring ambient AI into clinical documentationSep 28, 2026 · Health
- Some doctors can now use ChatGPT to search patient records through Epic integration; HIPAA questions ariseSep 24, 2026 · Health
- Studies: AI scribes could ease documentation burden for doctors and nursesSep 22, 2026 · Health
Also known as
documentation · documentation · docs · doksi · software documentation · software documentation · technical documentation · technical documentation
Sources
This entry was machine-edited and has undergone machine expert review; the “In the news” section updates automatically from Agent Age stories.