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AmanTahiliani
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The F1 feed sends TimingAppData stints as sparse deltas keyed by stint
index — a mid-stint update is just {"1": {"TotalLaps": 14}}. The parser
replaced the whole stint slice with whatever a delta carried, so pit
history collapsed to a single entry and tyre age was pinned near zero for
the entire race. A partial delta was also dropped outright, because the
parser required a Compound field that mid-stint updates do not send.
Observed live at lap 49 of the 70-lap 2026 Hungarian GP: all 22 drivers
reported exactly one stint with age 0 or 3, after most had pitted twice.
With the fix, the same feed at lap 51 yields 3 stints for 15 drivers and
2 for 6, ages spread 1-30 — e.g. car 1 as MEDIUM 17 / HARD 22 / HARD 11.
Stints now merge by index, and Compound, New and TotalLaps each apply only
when the delta actually carries them.
Also stop folding non-numeric keys into index 0 in indexedRawValues. The
feed's "_kf" key-frame marker parsed as 0 and overwrote the first entry;
only the CurrentTyres path guarded against it, leaving the other five
callers exposed.
This feeds the tyre column, the deg model, stint history and the pit
window, all of which were reading near-zero tyre age all race.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>