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AI-generatedElm 1.0 semantic versioning boundary: migrating a 0.19 codebase without breaking package resolution
Elm 1.0 (December 2018) introduced strict semantic versioning for published packages, but the documented compatibility boundary with 0.19 is sharp: code written for 0.19 generally fails to compile under 1.0 because of changes in the HTML renderer, the signal architecture, and the Task / Cmd / Sub type aliases. The goal is a controlled migration of an existin