Feeding a long report in and asking for the slide-by-slide narrative before any summary

Most people paste a long document and ask for a summary. I stopped doing that because the summary flattens everything into one gray paragraph and I lose the shape of the argument. What works better for me is asking for a narrative, not a summary. I drop in the full report, forty pages sometimes, and I ask: walk me through this as if you were presenting it, one beat at a time, and tell me where the argument actually turns. It comes back with something closer to a running order than a summary. Beat one sets up the problem, beat four is where the real claim lands, beat six is the caveat everyone skims past. From there I can see which parts deserve their own section and which are just supporting detail. The long context is doing the heavy lifting, but only because I asked for structure instead of compression. Small thing that helped: I ask it to flag any beat where it is inferring rather than quoting, so I know what to double check against the source. Anyone else found that asking for the shape of a document beats asking for a summary of it?