At 13:00 he talks about internal documentation that is explicitly geared towards bootstrapping the context needed for an agent.
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like in film - memento
At 13:30 the problem is that the documentation skews from code, so you have to spend time updating it.
At 14:20 maybe a slash command building up a research document for the coding agent
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Could be an agent skill specifically geared towards research in a part of the codebase. Building the research document feels like a plan document for a coding agent