nx_edgar_balance.nx

nx_edgar_balance.nx -- check OUR arithmetic against an AUTHORITATIVE SEC filing. The finance|statement-accuracy axis wants computed figures vs an authoritative filing. The accounting identity ASSETS = LIABILITIES + STOCKHOLDERS EQUITY is exactly that test: take the three facts the company itself filed, add two of them OURSELVES, and see whether we reproduce the third as filed. WHY THIS EXISTS RATHER THAN A PYTHON SCRIPT: I first ran this comparison with python doing the JSON parse and the addition. It matched 6/6 -- and proved nothing about US. The oracle may be third-party; the CAPABILITY must not be. Parsing and arithmetic are the capability here, so they belong in our code, using nx_edgar_lib's own fact extractor. ★★★★★IF A THIRD-PARTY TOOL DOES THE COMPUTING, THE MEASUREMENT IS ABOUT THAT TOOL. Input files are fetched by our sovereign TLS client (nx_https_get_cli2 --body). SEC is the oracle. license_tier: ORIGINAL No hw writes (Rule 26).