bfb80cb60d
All checks were successful
Check / eval (push) Successful in 2m56s
'Never has to master Nix' includes the error messages. The tool grows validate_state (appearance schema = hard errors; settings.* and unknown keys = warnings so menu writers and newer schemas keep working), a read-only `validate` subcommand, and validation BEFORE every write — an invalid set/apply is refused with the on-disk file untouched. JSON syntax errors now say line, column, and fix. theme.nix enforces the same schema at eval time (on the post-defaults state, so sparse/older files still evaluate) and throws a message naming each field, its got-value, and the fix paths — the hand-edit escape hatch no longer ends in a Nix stack trace. Doctor's JSON fix-text points at validate. V1: new checks.theme-sync-validate fixture corpus green (good state, trailing comma, bad hex, bad type, unknown key, refused set with byte-identical file); negative mkFlake eval of a broken scratch downstream shows the friendly throw; good-path template-home builds. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>