Have AI document legacy systems and old code

IT documents legacy systems and old code to preserve knowledge

Needs setupAI Act: no extra obligationsCreating software & codeAll industries

Fits: IT & software development

Knowledge about legacy programs that today exists only in a few people’s heads is written down before those people leave. New colleagues find their way around faster, and changes become less risky.

Is this for you?

  • You run programs that nobody fully understands any more, such as old business applications, macros or scripts without documentation.
  • There is still someone who knows the code and can confirm or correct the AI’s explanations.
  • You are allowed to give the code to an AI service or have an approved solution with an agreement.
First step today

Take a short function from an old program, replace company names, addresses and credentials, and use the template below to have it explained and described with tests. Run the tests against the original code and ask the person who knows the code whether the explanation is correct.

How to go about it

  1. Decide which system is documented and how
  2. Provide the code, a test environment and the knowledge holders
  3. Have explanations and tests generated
  4. Check explanations and tests against the real code
  5. Store the documentation next to the code
  6. Keep it up to date with every change

Templates to copy

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Included in the training

The complete guide

  • 6 steps explaining exactly what to do
  • 3 proven templates to copy into your own AI
  • Safe use: data, checking, deciding, informing
  • Pitfalls, effort and how to recognise success

With the training you get all 430 guides for as long as your access runs.

See the trainingOne-off per person, no subscription

Same approach, other use cases

13 more use cases follow the pattern “Creating software & code”.

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A-085 · Legal status 08.10.2026