Feat/badges pr30#30
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Six synthetic scaling curves — perfect, sync contention, Amdahl, false sharing, bandwidth saturation, load imbalance — each with 4 multiple-choice answers, inline SVG chart (dashed ideal + actual curve), reveal with explanation, and a final score screen. Quiz answers feed the Oracle / On Fire badge streak via recordPredict. No gateway or backend needed. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Drag a serial-fraction slider (0-100%) and watch the theoretical speedup ceiling update live on a log-scale SVG chart. Supports three modes: Amdahl's law (fixed work), Gustafson's law (scaled work), and both overlaid for direct comparison. Shows the ceiling asymptote, threads-to-90%-of-ceiling metric, and a plain-English explanation that updates as the slider moves. No gateway or backend required. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The TypeScript ! non-null assertion on r.peak was only a compile-time hint. At runtime, if the result arrives before the model effect fires (e.g. when switching experiments), peak is undefined and peak.speedup throws a TypeError. - Explain.falseSharing: peak = r.peak (drop !); guard if (padded || !peak) - Explain.mpiHalo: same pattern; if (weak || !peak) covers the edge case - r.coh ?? 0 in falseSharing: safe fallback instead of r.coh! Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Update all three docs to reflect the full Play hub (Race + Quiz + Sandbox + Badges) now that feat/badges-pr30 is merged in: - README: Play bullet updated to describe all four tabs - PROGRESS.md: Engagement row shows all 4 games done; Play bullet updated; status summary marks engagement layer fully complete; next-steps item 1 (merge badges-pr30) removed as now done - docs/02-roadmap.md: P5 status note changed from "partially landed" to "gamification layer complete" with all four games listed Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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