Errors point at the .jadpo line

Every stack, log event and error response that names a place names a .jadpo file and line, never the generated code. You don't turn this on; it is always the case. The compiler writes a source map, a record of which .jadpo line each piece of generated code came from. Before a frame is logged, the runtime uses that map to rewrite it, on the native target and on WebAssembly alike. A fault reads:

{"event":"operation.failed","classification":"int_overflow", "request_id":"req_0b1e…","build":"src_2c78570a2841d2f7", "stack":[   "domains/ordering/actions/price_line.jadpo:4  action price_line",   "domains/ordering/actions/place_order.jadpo:12  action place_order",   "domains/ordering/routes/orders.jadpo:8  route POST /orders"]}

A frame inside the runtime's own code shows as runtime: <component> rather than a generated-code path. That tells you the fault is in Jadpo, not in your app.

A domain failure, an outcome your app declares such as TodoNotFound, still logs no stack. It logs only where it was raised and the path it travelled (Logging). Frames carry places and names, never values.