A signed, notarized, fully tested build died on launch for every customer, because SwiftPM's resource accessor falls back to a path that exists only on your own Mac. The fix, and the release gate that catches it.
How I took LumenAI, a local-first native macOS RSS reader with full-text search, offline reading and pluggable AI summaries, from an empty folder to a signed DMG in about an hour, acting as product owner while the AI wrote the code.