Eleven tasks from the design, each with its own test cycle and commit.
Ordered so the schema field lands before anything derives from it and the
store migration is proved before a single row is expanded.
Three things the plan had to settle that the spec left to the implementer.
The overlap check is one exported predicate, because a form that restates
its schema's rule drifts from it and starts refusing saves that would
succeed. The timeline's expansion needs App to pass the same four scope
filters the lists use, so the predicate is extracted rather than copied.
And custom-ui.test.tsx renders statically with no testing-library in the
project at all, so anything needing a click is stated as a pure function
and tested directly rather than through a harness that does not exist.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
