The solver's position key reads stackAt (each tile oldest first). New tool
tools/verify-levels.mjs checks course/10-spellgrid/levels/proofs.json: each
level's shortest solution, and that it exhausts without its idea (neverRule)
or on the naive engine. Levels 4-10, one course idea each, with
test_10_level_N_solution in both tracks, scenarios and Lesson 10's list;
l1 no longer matches l10, and proofs.json is not listed as a level.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- lessons 8 and 9 updated for the once-per-move rule, per-object negated
conversion and the new ordering tests
- tools/solve-spellgrid.mjs: breadth-first search over a SpellGrid level
with the TypeScript reference; --never-rule and --naive
- README, harness.md and the mentor skill know the new beat and module
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
