nx_lsp_gate.nx

============================================================================================ nx_lsp_gate.nx -- the referee for LN11 (nx_lsp, the NishiLang language server). WHAT IT PROVES, and why each half is load-bearing: A CLEAN document must publish ZERO diagnostics and a BROKEN one must publish exactly ONE at the right line and column. Either half alone is trivially passable: a server that always reports an error passes the broken case, and a server that never reports one passes the clean case. Only the PAIR discriminates, so the pairing is a gv_bite cell and not two independent teeth. The UTF-16 column is checked against a byte column that is DIFFERENT, on a line built at runtime with multi-byte characters before the offending name. A server that passed byte columns through would satisfy "character is a plausible number" and fail this. That is the anti-vacuity tooth. The transcript is a REAL client: a recorded byte stream fed to `nx_lsp serve` on stdin with stdout captured. Nothing is stubbed, and the framing validator re-derives every Content-Length from the bytes that followed it -- an escaping bug that shortens a body cannot hide behind a self-consistent header. DELIBERATE DUPLICATION, DECLARED: this gate carries its OWN substring search, its OWN JSON string escaper and its OWN UTF-16 counter. That is not the duplicate-ruler defect -- it is the opposite. A test that measures the subject with the subject's own helpers cannot catch a defect IN those helpers, and the escaper and the column arithmetic are exactly where the interesting defects live. FIXTURES ARE ASSEMBLED AT RUNTIME in /tmp/nx_lsp_gate/ -- never checked in, never shared with a production beat, and never written into the estate's own source tree where a detector that scans sources would find this gate's own bad input and report it as a real defect. The multi-byte characters are CONSTRUCTED FROM BYTES rather than written as literals: a source file crosses several transports before it reaches a compiler and each of them can re-encode a literal. license_tier: ORIGINAL No hardware writes (Rule 26). ============================================================================================