nx_compare_feed_lib.nx

nx_compare_feed_lib.nx -- THE COMPARE FEED (ecosystem EC47, 2026-09-16): every /compare board's daily place on the four-quadrant map and the board rows journaled that day, emitted as ONE RSS 2.0 feed the regenerator publishes at /compare/feed.xml on the same beat that republishes the pages. Operator (goal, 2026-09-15): "where we are and our competitors and where we are moving as time goes on daily like the rss feed with more and more expansive reviews". INPUTS -- all data the estate already writes, nothing typed here: knowledge/compare/regen.list the boards knowledge/status/cdmap/<dom>.spine cd|<epoch>|<day>|<player>|<C>|<D>|<breadth-points>|<rows>|<players>|<held> one row per player per calendar day, written by the FIRST publish of the day knowledge/compare/<dom>.plan log|<epoch>|<rung>|<kind>|<text> rows, the board's own worked ledger OUTPUT: one <item> per board per spine day inside the window (CF_WINDOW_DAYS), board-major and newest day first inside a board; every item carries its own pubDate (the spine row's epoch) so a reader orders them by time. The title carries Nishi's centrality, distinctiveness and quadrant and the move since the previous spine day; the body lists every player's position, quadrant and move, then the board rows journaled on that day -- so the review grows with the board. THE QUADRANT IS THE MAP'S OWN RULE: cd_quadrant over the day's player means (nx_cdmap_lib), never a second cut. Composes nx_rss_lib (the estate's RSS 2.0 builder), nx_timefmt (civil dates) and nx_cdmap_lib (the quadrant rule). Pure over the root it is pointed at (root prefix + the relative paths above), so nx_compare_feed_gate drives it on a fixture root. Every count it decides on is published in st[] (partition: items = distinct in-window (board, day) pairs). A spine or plan larger than its index is announced as OVERFLOW and read as a prefix, never silently. A body that would not fit its scratch is announced as SHORT and the board's item is not emitted (a truncated feed is not a feed). license_tier: ORIGINAL. No hw writes (Rule 26).