The library changed after these were written and more changes are already
decided upstream. Records what is wrong today, what to write toward, the
one question still open, and the fast-JSON-field trap, rather than
silently leaving code that would fail on contact.
16 bite-sized, TDD tasks across the design spec's 4-PR stack, each with
a suggested subagent type/model for delegated execution. Test/fixture
code in the acceptance-corpus and API-expansion tasks was verified
against the real codebase (documents/tests/search/conftest.py's
existing backend/index fixtures, test_backend.py's pytestmark
convention, CustomFieldInstance's typed value_text field) rather than
guessed, and the date-grammar parity test's AST-shape assumption was
confirmed by actually running whoosh_compat.parse() against a real
DATE FieldRegistry.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>