Writing
Field notes from building on the record.
On context engineering, agent coordination, world models, and holding the consequential write. Mechanisms, not adjectives.
Context engineering
What a file cannot do
A markdown rule can describe a boundary. It cannot stop an action. That gap is the whole argument.
World modelsThe rebuild tax has no invoice
Every stack change, the team rebuilds the context that made the last setup work. The cost never shows up as a line item.