PDF Explore — navigate a PDF too big to embed

A 50-page PDF read in full is ~200K tokens of context. When the answer draws on several sections at once (summarize the methods; compare section 3 and section 5), or when the answer is "every page" (list all the datasets / citations / figures / benchmarks mentioned anywhere in this document), reading the whole thing page-by-page is the expensive way to get it. This skill parses the PDF once into persistent text with a deterministic Python kernel, then lets you narrow — by outline, by lexical scan, by regex — and read only the pages you actually need, reasoning over them yourself. Nothing you read vanishes: it is ordinary text and ordinary files.

Setup (any agent, no API key)

This is a pure skill — kernel.py is deterministic Python and you (the base model) do all the reasoning. There is no host runtime and no LLM API. Load the helpers once per session in a Python cell: