nx_browser_census.nx

nx_browser_census.nx -- SOVEREIGN browser-parity census scoreboard organ (MCP tool + API payload). Operator directive 2026-07-23: "mcp and api and object oriented and agentic and workflow ready ... it needs to scale." Replaces the one-off PowerShell -> static-JSON pipeline (the scattering root) with a data-driven sovereign organ: sites + per-site results live in the SEG-STORE PLANE knowledge/store/browsercensus- (NOT hardcoded, NOT a tsv per the sovereign-formats law) -> ADD SITES WITHOUT TOUCHING CODE = scales to N. Reads the plane, parses each site RECORD, aggregates a SCOREBOARD (mean reading-recall vs Chrome, class counts, mean height-ratio), emits structured JSON to stdout (the MCP + API payload) AND colocates it to knowledge/status/browser_census.log (evidence). Fail-closed: absent/empty plane -> RED exit 1 (no scoreboard without data). ---- BR2, 2026-08-26: THE STRUCTURAL-EXACTNESS COLUMN (rung BR2, symbol bc_struct_col) ---------------- The operator ratchet of 2026-07-28 is EXACT structural match to Chrome/Edge/Firefox, measured by struct_diff matched-permil with dy and dx toward 0. Until today that lived in hand-run readings pasted into a plan row; the census -- the thing that publishes -- had no column for it, so the ratchet could not be tracked per site and could not be judged mechanically. Row schema, now TEN tab fields (the last four are ADDITIVE -- a six-field row still parses and its struct columns read UNMEASURED, never a silent 0): site class reading_recall_pm ratio_pct chrome_h nishi_h struct_matched_pm struct_dy struct_dx struct_bands_oracle THE FOURTH NEW COLUMN IS THE DENOMINATOR AND IT IS NOT DECORATION. Measured on saved bytes on 2026-08-26 with the incumbent ruler: google returned "matched=2 (1000 permille)" over TWO oracle text bands, and stackoverflow returned "matched=0 (0 permille)" over ZERO. A perfect score and a total failure, both arithmetic on an empty subject, both arriving as a number a scoreboard would average. bsc_band_floor() derives the smallest usable denominator FROM THE BAR itself and such rows are counted as UNDERPOWERED -- named, excluded, never averaged and never silently dropped. reading_recall_pm/ratio_pct = "-" or non-digit means UNMEASURED (excluded from the mean, never a silent 0). Workflow-ready: one plane row per site, one JSON record per site -> composable/fan-out. license_tier: ORIGINAL expect_exit: 0