The running routes worked. The code disappeared.

A request for 5 km and 10 km running loops produced an embedded map, GPX files and GeoJSON after 27 minutes. The assistant had used OpenStreetMap data, Nominatim geocoding and Overpass to find roads and trails, then calculated routes locally.

But when Simon Willison asked for the code, it was no longer available. He suspected conversation compaction had discarded it; the post does not establish that diagnosis.

His proposed fix is to keep the original conversation accessible through retrieval tools after compaction. The active context can stay short while retaining a route back to the actual work. A map is useful, but it cannot explain or reproduce the program that made it.