CreateOpts gains IsProject, SeedDir, and ProjectSeedDir. The new
seeding flow is:
1. write built-in defaults (task or project CLAUDE.md + notes.md)
2. apply general seed if SeedDir != "" (overlay)
3. apply project seed if IsProject && ProjectSeedDir != "" (overlay)
4. write task.yaml (last, so seeds can never inject metadata)
The obsolete TestCreateDoesNotOverwriteSeedFiles test is removed:
its v0.2 invariant ("don't overwrite existing files") no longer
holds because v0.3 always lays defaults onto a fresh dir and seeds
are expected to overwrite.
typebasedio
e09eac62d1