Two facts from the adversarial review of PR #92, both about checks that
cannot fail.
improvise-jmjz guarded its width half with col_widths == compute_col_widths,
but compute_col_widths IS grid_body with an empty window — the same function
twice — so windowing degrades both sides identically and the assertion cannot
fail. Injecting the fault left 1476 tests passing. A consolidation is exactly
when such a check gets written, because the second implementation has just
been deleted.
And a negative result is only as good as the setup that produced it: the
none_cats hazard was reported 'argued and unobserved' from a fixture whose
stated condition was absent, because add_category defaults a category to
Column and nothing moved it. Setting the axis explicitly failed the property
on the first run and found improvise-ac2z.
Filed from the same review: improvise-711n (parse_number_format yields zero
decimals for the ,.2f spelling our own docs show, P2) and improvise-swre
(memoise the grid across frames). improvise-jmjz closed on its own criterion;
improvise-6nsd lowered to P4 with the severity note.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FC2jVn8Au7E9JPkw6bwXXH
Edward Langley
99ec32d6f3