Index: frontmatter properties (200 per note, 4 KiB per value, 500 list items, 3 levels), size and times; persistent cache format version 2 (old caches are replaced). Engine: base.list, base.read, base.properties, base.query over the index (limit 200 default, over 2000 is an error), base.write (validated; never replaces an unreadable file), base.create, base.view.add|remove|rename|duplicate|reorder, base.row.set (types.json, one undo step in an open buffer, file.name renames with links; other file.* and formula.* are read-only). Bases tasks 9, 10, 11 (Claude Sonnet). Verified with the full cargo xtask ci on a copy of the tree (4526 tests, clippy -D warnings, layers, tree, i18n). Gaps: no result cache keyed by index generation, no 15k-note perf test, base.row.set writes numbers as 5.0.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Marcos Paulo