nx_tictactoe_html_contract_test.nx

nx_tictactoe_html_contract_test.nx -- bits-up HTML-contract checker. Reads stdin (piped index.html), asserts the UI contract: - exactly 9 cell elements are present (marker: `data-cell-idx="N"`) - the 9 instances appear in ORDER N=0,1,2,3,4,5,6,7,8 This catches the click-handler-maps-to-wrong-cell bug class (the tic-tac-toe equivalent of the W/S inversion). Composes §22.1 bug-class prevention without needing a third-party browser driver. Per [[feedback-no-third-party-in-build-path-source-of-truth-is-bits-up]]: pure NishiLang. No grep, no awk, no Playwright, no Selenium. Just bytes. Bench harness pipes the HTML via stdin so this test is portable across machines without hardcoded paths: cat dist/tictactoe/index.html | qemu-riscv64-static <binary> genealogy_id: nx_tictactoe_html_contract_v1_2026_05_19 lineage_id: bits_up_html_attribute_contract_checker