Does the board the manager was handed carry a row for rookies who actually played, and is the gap the fantasy-rostership gate on forecast.py's rookie-prior and second-opinion fallbacks? And were any of the missed men decisions?
Owner lane: decision
Question
Does the board the manager was handed carry a row for rookies who actually played, and is the gap the fantasy-rostership gate on forecast.py's rookie-prior and second-opinion fallbacks? And were any of the missed men decisions?
Prediction
Prereg 2026-09-23T1756Z: played rookies weeks 1-2 30-55% covered, non-rookies >= 95%; rostered rookies >= 95% covered (the gate is the mechanism); E4 2-8 decision-relevant uncovered men per week, majority rookies; consensus has a number for > 60% of uncovered men.
Finding and verdict
TESTED -- PREMISE CONFIRMED, DECISION COST NIL IN WEEKS 1-2. The rostership gate is the whole mechanism: every not-rostered rookie who played had no row (0/84), and rookie coverage was 17% and 11% against 96-97% for everyone else. But the gap has not cost a decision yet: no uncovered rookie scored a flex-starting week (best 14.4 half-PPR vs a 17.7 threshold), and the one decision-relevant hole was a veteran QB with no 2025 played row (H-116's path, Watson). The board cannot rank a waiver rookie against a rostered starter; so far that has hidden 172.6 half-PPR points spread over 86 men, none a start. Two rostered rookies fell off the week-2 board, which is H-246's week-2 window defect, not the gate.
Reasoning
The decision a hole could cost is a waiver add (start/sit only concerns rostered men, who are covered 100% apart from 2 rookies in wk2). Two weeks is small: a breakout rookie (a depth-3 man promoted) is exactly the case the gate hides, and it did not happen in these two weeks.
Next action
Re-run weekly through week 6 with the same runner (cheap, stored boards). The consensus column player_week.proj_fantasypros has no rookie rows in wk1 and no rows at all in wk2 -- a free number the decision lane must grade beside cannot be read; noted for the data path, not measured here.
Source provenance and publication scope
Owned research record: research/scientist/experiments/2026-09-23T1756Z-h156-rookie-board-coverage.json
This public reading view includes authored question, finding, review, reasoning and next action fields. Raw measurements, commands, logs and local paths are withheld. The record ID clock is not proof of completion or deployment.