Implements steps 1-3 of the Claude Design handoff:
- MatchTimeline: vertical center spine (home left, away right, minute
pills on the rail), goal cards with parsed scorer/assist/running
score, sub and booking chips, synthetic kick-off/half-time/full-time
dividers; single left rail under the sm breakpoint
- matchEvents: pure ESPN commentary parser (scorer, assist, penalty,
own goal, sub in/out, embedded score) with tests on real feed shapes
- Hero scoreboard: panel gradient + accent glow, smallcaps meta, mono
score, stat chips (xG / POTM / attendance / referee; possession and
shots while live); weather line stays for upcoming matches
- Sticky Summary/Timeline/Stats/Lineups sub-nav; all existing cards
re-bucketed with no feature loss (in-play win prob, swing chart,
xG race, shot map, momentum, odds movement, form, H2H, lineups)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The CV harness gained a calibration experiment: per-outcome isotonic
maps (pool-adjacent-violators) fit walk-forward on the five folds and
judged leave-one-fold-out against a pre-registered bar. It cleared it:
LOFO ECE improves 16% (0.0146 → 0.0122) with RPS slightly better too
(0.1724 → 0.1722). The final maps (fit on all folds) are committed as
a research artifact, embedded into ratings.json by buildRatings when
the shipped config matches, and applied in matchMatrix by scaling the
score-matrix outcome regions — scorelines, Monte Carlo and displayed
probabilities all stay mutually consistent. Without the field, output
is bit-identical (golden tests).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Five two-year walk-forward folds (2014-2024), each with its own
pre-fold parameter fit; selection by mean fold RPS; staged greedy over
Team-DC decay/shrinkage/weight, fast-Elo blend, form multiplier, and
new Elo-walk axes (home advantage, K scale); untouched 2024-26 final
test. Result: the shipped v4 config holds — the staged champion gained
0.0003, under the 0.0005 ship bar, and the final test agrees. v4 is no
longer a one-window result.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
NilsBriggen