A context engineering metaphor I've been playing around with: - Primary source: the source of truth. Raw data. Transcripts. Code. - Secondary source: one step removed. Summaries. Compactions. Documentation. For instance, compaction takes a primary source (the conversation history) and turns it into a secondary source (the summary). This is lossy, but means the secondary source can fit into a smaller space. If you want to know what your codebase does, your code is a primary source. Your docs…