Closed composition
The last paragraph paraphrases the first. Algorithms often use this template for formal summaries.
[Start] Migrating a network of sites to a single PHP core is a complex but necessary step to simplify support...
... 3 paragraphs of water ...
[End] In conclusion, it is worth noting that unifying projects on a single PHP core indeed proved to be a complex but necessary decision that justified itself.
[Start] Got tired of updating plugins on twenty WordPress sites, so we decided to drag the whole network to our own custom engine.
... 3 paragraphs of pain and debugging ...
[End] Anyway, memory limits are no longer an issue. Tomorrow I'll try to hook up bulk image uploads to this admin panel.
School essay vs Reality
Algorithms are trained on academic texts, where the structure is strictly set: introduction, thesis, conclusion (which paraphrases the introduction). The machine always summarizes, even if the text consists of only three sentences.
A human writing in blogs, work logs, or articles writes linearly. They do not look back to retell what the reader has just read. They either just put a period (cut the text off) or formulate the next step — a plan for the future.