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<!doctype html>
<html lang="en">
<head>
 <meta charset="utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1" />
 <title>Candidate B GEPA Seed Decision</title>
 <style data-birch-system>/*
 Birch HTML Design System
 Opinionated single-option stylesheet for reliable LLM-generated artifacts.
 Model:
 1. Design tokens as CSS variables.
 2. Layout primitives as classes.
 3. Semantic components as classes with data-* variants.
*/
/* ==================== 1. TOKENS ==================== */
:root {
 color-scheme: light;
 /* Palette */
 --color-ivory: #FAF9F5;
 --color-slate: #141413;
 --color-clay: #D97757;
 --color-clay-dark: #B85C3E;
 --color-oat: #E3DACC;
 --color-olive: #788C5D;
 --color-rust: #B04A3F;
 --color-sky: #6A8CAF;
 --color-white: #FFFFFF;
 --color-gray-50: #F7F5EE;
 --color-gray-100: #F0EEE6;
 --color-gray-150: #E8E4DA;
 --color-gray-200: #DED9CD;
 --color-gray-300: #D1CFC5;
 --color-gray-500: #87867F;
 --color-gray-700: #3D3D3A;
 --color-gray-800: #242421;
 /* Semantic colors */
 --bg: var(--color-ivory);
 --surface: var(--color-white);
 --surface-tint: var(--color-gray-100);
 --surface-warm: var(--color-oat);
 --text: var(--color-slate);
 --text-muted: var(--color-gray-500);
 --text-soft: var(--color-gray-700);
 --muted: var(--text-muted);
 --border-color: var(--color-gray-300);
 --accent: var(--color-clay);
 --accent-strong: var(--color-clay-dark);
 --success: var(--color-olive);
 --warning: #C78E3F;
 --danger: var(--color-rust);
 --info: var(--color-sky);
 /* Typography */
 --font-serif: ui-serif, Georgia, "Times New Roman", serif;
 --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
 --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
 --text-xs: 11px;
 --text-sm: 12px;
 --text-md: 14px;
 --text-base: 15px;
 --text-lg: 17px;
 --text-xl: 21px;
 --text-2xl: 26px;
 --text-3xl: 36px;
 --text-4xl: 44px;
 --leading-tight: 1.15;
 --leading-title: 1.25;
 --leading-body: 1.55;
 --leading-loose: 1.7;
 /* Spacing */
 --space-1: 4px;
 --space-2: 8px;
 --space-3: 12px;
 --space-4: 16px;
 --space-5: 24px;
 --space-6: 32px;
 --space-7: 48px;
 --space-8: 64px;
 --space-9: 96px;
 /* Shape */
 --radius-xs: 4px;
 --radius-sm: 8px;
 --radius-md: 12px;
 --radius-lg: 16px;
 --radius-xl: 20px;
 --radius-pill: 999px;
 --border: 1.5px solid var(--border-color);
 --border-thin: 1px solid var(--border-color);
 --shadow-sm: 0 1px 2px rgba(20, 20, 19, 0.06);
 --shadow-md: 0 4px 14px rgba(20, 20, 19, 0.08);
 --shadow-lg: 0 12px 28px rgba(20, 20, 19, 0.12);
 /* Motion */
 --ease: cubic-bezier(0.2, 0, 0, 1);
 --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
 --dur-fast: 120ms;
 --dur: 180ms;
 --hover-y: -2px;
 /* Page sizing */
 --page-max: 1100px;
 --page-pad: 28px;
 --page-pad-block: 48px;
 /* Legacy aliases used by source examples */
 --ivory: var(--color-ivory);
 --slate: var(--color-slate);
 --clay: var(--color-clay);
 --clay-d: var(--color-clay-dark);
 --oat: var(--color-oat);
 --olive: var(--color-olive);
 --rust: var(--color-rust);
 --sky: var(--color-sky);
 --white: var(--color-white);
 --gray-50: var(--color-gray-50);
 --gray-100: var(--color-gray-100);
 --gray-150: var(--color-gray-150);
 --gray-200: var(--color-gray-200);
 --gray-300: var(--color-gray-300);
 --gray-500: var(--color-gray-500);
 --gray-700: var(--color-gray-700);
 --gray-800: var(--color-gray-800);
 --serif: var(--font-serif);
 --sans: var(--font-sans);
 --mono: var(--font-mono);
}
/* ==================== BASE ==================== */
*,
*::before,
*::after {
 box-sizing: border-box;
}
html {
 background: var(--bg);
 color: var(--text);
 font-family: var(--font-sans);
 -webkit-text-size-adjust: 100%;
}
body {
 margin: 0;
 background: var(--bg);
 color: var(--text);
 font-family: var(--font-sans);
 font-size: var(--text-base);
 line-height: var(--leading-body);
 -webkit-font-smoothing: antialiased;
 text-rendering: optimizeLegibility;
}
img,
svg {
 max-width: 100%;
}
a {
 color: inherit;
 text-decoration-color: rgba(217, 119, 87, 0.45);
 text-underline-offset: 3px;
}
a:hover {
 color: var(--accent);
}
h1,
h2,
h3,
p {
 margin-block: 0;
}
h1,
h2,
h3 {
 font-family: var(--font-serif);
 font-weight: 500;
 letter-spacing: -0.01em;
 line-height: var(--leading-title);
}
h1 {
 font-size: clamp(32px, 5vw, var(--text-4xl));
}
h2 {
 font-size: var(--text-2xl);
}
h3 {
 font-size: var(--text-xl);
}
code,
kbd,
pre {
 font-family: var(--font-mono);
}
code {
 font-size: 0.92em;
 white-space: normal;
 word-break: normal;
}
h1 code,
h2 code,
h3 code {
 overflow-wrap: anywhere;
 word-break: break-word;
}
button,
input,
textarea,
select {
 font: inherit;
}
button {
 cursor: pointer;
}
::selection {
 background: rgba(217, 119, 87, 0.24);
}
/* ==================== 2. LAYOUT PRIMITIVES ==================== */
.page {
 width: min(100% - (var(--page-pad) * 2), var(--page-max));
 margin-inline: auto;
 padding-block: var(--page-pad-block) var(--space-9);
}
.page[data-size="narrow"] {
 --page-max: 820px;
}
.page[data-size="wide"] {
 --page-max: 1280px;
}
.page[data-size="full"] {
 --page-max: 1440px;
}
.section {
 margin-block: var(--section-gap, var(--space-5));
}
.section[data-gap="lg"] {
 --section-gap: var(--space-6);
}
.section[data-gap="xl"] {
 --section-gap: var(--space-7);
}
.section:first-child {
 margin-block-start: 0;
}
.stack > .section {
 margin-block: 0;
}
.rule {
 border: 0;
 border-top: var(--border-thin);
 margin: var(--space-3) 0 var(--space-5);
}
.stack {
 display: flex;
 flex-direction: column;
 gap: var(--stack-gap, var(--space-4));
}
.stack[data-gap="xs"] { --stack-gap: var(--space-2); }
.stack[data-gap="sm"] { --stack-gap: var(--space-3); }
.stack[data-gap="md"] { --stack-gap: var(--space-4); }
.stack[data-gap="lg"] { --stack-gap: var(--space-6); }
.stack[data-gap="xl"] { --stack-gap: var(--space-8); }
.stack > :is(.button, .btn, .chip, .badge) {
 align-self: flex-start;
}
.cluster {
 display: flex;
 flex-wrap: wrap;
 align-items: center;
 gap: var(--cluster-gap, var(--space-3));
}
.cluster[data-align="start"] { align-items: flex-start; }
.cluster[data-align="end"] { align-items: flex-end; }
.cluster[data-justify="between"] { justify-content: space-between; }
.cluster[data-justify="end"] { justify-content: flex-end; }
.grid {
 display: grid;
 gap: var(--grid-gap, var(--space-5));
}
.grid[data-cols="2"] {
 grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid[data-cols="3"] {
 grid-template-columns: repeat(3, minmax(0, 1fr));
}
.grid[data-cols="4"] {
 grid-template-columns: repeat(4, minmax(0, 1fr));
}
.auto-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(min(100%, var(--grid-min, 240px)), 1fr));
 gap: var(--grid-gap, var(--space-5));
}
.auto-grid > * {
 min-width: 0;
}
.split {
 display: grid;
 grid-template-columns: minmax(0, 1fr) minmax(280px, var(--split-side, 360px));
 gap: var(--split-gap, var(--space-6));
 align-items: start;
}
.split > * {
 min-width: 0;
}
.section-head {
 min-width: 0;
}
.section-rail {
 display: grid;
 grid-template-columns: minmax(0, 1fr) minmax(280px, var(--rail-width, 360px));
 column-gap: var(--rail-gap, var(--space-6));
 row-gap: var(--space-5);
 align-items: start;
}
.section-rail > .section-head {
 grid-column: 1 / -1;
}
.section-rail > .reference-panel,
.section-rail > aside {
 align-self: start;
}
.sidebar-layout {
 display: grid;
 grid-template-columns: var(--sidebar-width, 240px) minmax(0, 1fr);
 gap: var(--sidebar-gap, var(--space-7));
 align-items: start;
}
.sidebar-layout > :first-child,
.sticky {
 position: sticky;
 top: var(--sticky-top, var(--space-5));
}
.bleed {
 margin-inline: calc(var(--page-pad) * -1);
}
.scroll-x {
 overflow-x: auto;
 overscroll-behavior-inline: contain;
}
.center {
 display: grid;
 place-items: center;
}
.spacer {
 flex: 1;
}
@media (max-width: 860px) {
 :root {
 --page-pad: 20px;
 --page-pad-block: 40px;
 }
 .grid[data-cols],
 .split,
 .section-rail,
 .sidebar-layout {
 grid-template-columns: 1fr;
 }
 .sidebar-layout > :first-child,
 .sticky {
 position: static;
 }
}
/* ==================== TYPOGRAPHY UTILITIES ==================== */
.eyebrow {
 display: inline-flex;
 align-items: center;
 gap: var(--space-2);
 color: var(--accent);
 font-family: var(--font-mono);
 font-size: var(--text-xs);
 font-weight: 700;
 letter-spacing: 0.08em;
 text-transform: uppercase;
}
.eyebrow::before {
 content: "";
 width: 24px;
 height: 1.5px;
 background: currentColor;
}
.lede {
 max-width: 720px;
 color: var(--text-soft);
 font-size: var(--text-lg);
 line-height: 1.6;
}
.muted {
 color: var(--text-muted);
}
.caption {
 color: var(--text-muted);
 font-family: var(--font-mono);
 font-size: var(--text-sm);
}
.stat-value {
 display: block;
 color: var(--text);
 font-family: var(--font-serif);
 font-size: clamp(30px, 3.2vw, 42px);
 font-variant-numeric: tabular-nums;
 font-weight: 550;
 letter-spacing: -0.025em;
 line-height: 1;
}
.stat-card {
 gap: var(--space-2);
}
.stat-card .caption {
 letter-spacing: 0.08em;
 text-transform: uppercase;
}
.stat-card .muted {
 max-width: 34ch;
 font-size: var(--text-sm);
}
.mono {
 font-family: var(--font-mono);
}
/* ==================== 3. SEMANTIC COMPONENTS ==================== */
.panel,
.card {
 background: var(--surface);
 border: var(--border);
 border-radius: var(--radius-md);
}
.panel {
 padding: var(--panel-pad, var(--space-5));
}
.card {
 padding: var(--card-pad, var(--space-5));
 transition:
 transform var(--dur-fast) var(--ease),
 border-color var(--dur-fast) var(--ease),
 box-shadow var(--dur-fast) var(--ease),
 background-color var(--dur-fast) var(--ease);
}
.card[data-hover="lift"]:hover,
.card[data-clickable]:hover {
 transform: translateY(var(--hover-y));
 border-color: rgba(217, 119, 87, 0.55);
 box-shadow: var(--shadow-md);
}
.card[data-clickable] {
 cursor: pointer;
}
.card[data-variant="flat"] {
 background: transparent;
 border-color: transparent;
 box-shadow: none;
}
.card[data-variant="outlined"] {
 background: var(--surface);
 border: var(--border);
}
.card[data-variant="elevated"] {
 border-color: transparent;
 box-shadow: var(--shadow-md);
}
.card[data-variant="filled"],
.card[data-tone="oat"] {
 background: var(--surface-warm);
}
.card[data-tone],
.panel[data-tone],
.callout[data-tone] {
 background: var(--surface);
}
.card[data-tone="danger"],
.panel[data-tone="danger"],
.callout[data-tone="danger"] {
 border-color: rgba(176, 74, 63, 0.36);
}
.card[data-tone="warning"],
.panel[data-tone="warning"],
.callout[data-tone="warning"] {
 border-color: rgba(199, 142, 63, 0.38);
}
.card[data-tone="success"],
.panel[data-tone="success"],
.callout[data-tone="success"] {
 border-color: rgba(120, 140, 93, 0.38);
}
.card[data-tone="info"],
.panel[data-tone="info"],
.callout[data-tone="info"] {
 border-color: rgba(106, 140, 175, 0.36);
}
.card[data-accent] {
 position: relative;
 overflow: hidden;
}
.card[data-accent]::before {
 content: "";
 position: absolute;
 inset: 0 auto 0 0;
 width: 5px;
 background: var(--accent);
}
.card-head {
 display: flex;
 align-items: center;
 gap: var(--space-3);
 min-width: 0;
 max-width: 100%;
}
.card-head > :first-child {
 flex: 0 0 auto;
}
.card-titles {
 flex: 1 1 0;
 min-width: 0;
 max-width: 100%;
}
.card-title {
 max-width: 100%;
 margin: 0;
 font-family: var(--font-serif);
 font-size: var(--text-xl);
 font-weight: 550;
 line-height: var(--leading-title);
 overflow-wrap: anywhere;
}
.card-sub {
 margin: 2px 0 0;
 color: var(--text-muted);
 font-size: var(--text-sm);
 overflow-wrap: anywhere;
}
.toolbar {
 display: flex;
 flex-wrap: wrap;
 align-items: center;
 gap: var(--space-4);
 padding: var(--space-4) var(--space-5);
 background: var(--surface);
 border: var(--border);
 border-radius: var(--radius-md);
}
.toolbar[data-sticky] {
 position: sticky;
 top: 0;
 z-index: 10;
}
.chip,
.badge {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 gap: 6px;
 border-radius: var(--radius-pill);
 white-space: nowrap;
 font-family: var(--font-mono);
 font-size: var(--text-xs);
 font-weight: 650;
 line-height: 1;
}
.chip {
 min-height: 24px;
 padding: 0 10px;
 color: var(--text-soft);
 background: var(--surface-tint);
 border: 1px solid transparent;
}
.badge {
 min-height: 22px;
 padding: 0 9px;
 color: var(--text-muted);
 background: var(--surface);
 border: var(--border-thin);
 text-transform: uppercase;
 letter-spacing: 0.06em;
}
.chip[data-tone="clay"],
.badge[data-tone="clay"] {
 color: var(--accent);
 background: rgba(217, 119, 87, 0.14);
}
.chip[data-tone="olive"],
.badge[data-tone="olive"],
.chip[data-tone="success"],
.badge[data-tone="success"] {
 color: var(--success);
 background: rgba(120, 140, 93, 0.15);
}
.chip[data-tone="warning"],
.badge[data-tone="warning"] {
 color: var(--warning);
 background: rgba(199, 142, 63, 0.16);
}
.chip[data-tone="rust"],
.badge[data-tone="rust"],
.chip[data-tone="danger"],
.badge[data-tone="danger"] {
 color: var(--danger);
 background: rgba(176, 74, 63, 0.13);
}
.chip[data-tone="sky"],
.badge[data-tone="sky"],
.chip[data-tone="info"],
.badge[data-tone="info"] {
 color: var(--info);
 background: rgba(106, 140, 175, 0.14);
}
.finding {
 border-left: 6px solid var(--border-color);
}
.finding[data-severity="blocker"],
.finding[data-severity="critical"],
.finding[data-severity="danger"],
.finding[data-tone="danger"] {
 border-left-color: var(--danger);
}
.finding[data-severity="high"],
.finding[data-severity="warning"],
.finding[data-tone="warning"] {
 border-left-color: var(--warning);
}
.finding[data-severity="medium"],
.finding[data-severity="info"],
.finding[data-tone="info"] {
 border-left-color: var(--info);
}
.finding[data-severity="low"],
.finding[data-severity="success"],
.finding[data-tone="success"] {
 border-left-color: var(--success);
}
.button,
.btn {
 appearance: none;
 display: inline-flex;
 align-items: center;
 justify-content: center;
 min-height: 36px;
 padding: 0 14px;
 border: 1.5px solid transparent;
 border-radius: var(--radius-sm);
 font-family: var(--font-sans);
 font-size: var(--text-md);
 font-weight: 650;
 line-height: 1;
 text-decoration: none;
 transition:
 transform var(--dur-fast) var(--ease),
 background-color var(--dur-fast) var(--ease),
 border-color var(--dur-fast) var(--ease),
 box-shadow var(--dur-fast) var(--ease);
}
.button:hover,
.btn:hover {
 transform: translateY(-1px);
}
.button[data-variant="primary"],
.btn-primary {
 color: var(--color-white);
 background: var(--color-slate);
}
.button[data-variant="primary"]:hover,
.btn-primary:hover {
 background: var(--color-gray-700);
}
.button[data-variant="secondary"],
.btn-secondary {
 color: var(--text);
 background: var(--surface-tint);
 border-color: var(--border-color);
}
.button[data-variant="ghost"],
.btn-ghost {
 color: var(--text-soft);
 background: transparent;
}
.button[data-variant="ghost"]:hover,
.btn-ghost:hover {
 color: var(--text);
 background: var(--surface-tint);
}
.button[data-variant="danger"],
.btn-danger {
 color: var(--color-white);
 background: var(--danger);
}
.input {
 width: 100%;
 min-height: 38px;
 padding: 0 12px;
 color: var(--text);
 background: var(--surface);
 border: var(--border);
 border-radius: var(--radius-sm);
 outline: none;
}
.input:focus {
 border-color: var(--accent);
 box-shadow: 0 0 0 3px rgba(217, 119, 87, 0.16);
}
.avatar {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 width: var(--avatar-size, 38px);
 height: var(--avatar-size, 38px);
 border-radius: 50%;
 color: var(--text-soft);
 background: var(--surface-warm);
 font-family: var(--font-mono);
 font-size: var(--text-sm);
 font-weight: 700;
 letter-spacing: 0.02em;
 flex: 0 0 auto;
}
.code-block {
 margin: 0;
 padding: var(--space-4) var(--space-5);
 overflow-x: auto;
 color: #E8E6DC;
 background: var(--color-slate);
 border-radius: var(--radius-md);
 font-family: var(--font-mono);
 font-size: var(--text-sm);
 line-height: var(--leading-loose);
}
.code-block[data-kind="command"],
.code-block[data-wrap="true"],
.command-block {
 max-width: 100%;
 min-width: 0;
 box-sizing: border-box;
 white-space: pre-wrap;
 overflow-wrap: anywhere;
 word-break: break-word;
 overflow-x: hidden;
}
.code-block[data-wrap="true"] code,
.code-block[data-kind="command"] code {
 display: block;
 max-width: 100%;
 white-space: pre-wrap;
 overflow-wrap: anywhere;
 word-break: break-word;
}
.copyable {
 position: relative;
}
.copyable > .code-block {
 padding-inline-end: 88px;
}
.copy-button {
 appearance: none;
 position: absolute;
 inset-block-start: var(--space-2);
 inset-inline-end: var(--space-2);
 display: inline-flex;
 align-items: center;
 justify-content: center;
 min-height: 26px;
 padding: 0 9px;
 border: 1px solid rgba(250, 249, 245, 0.18);
 border-radius: var(--radius-sm);
 color: var(--color-gray-100);
 background: rgba(255, 255, 255, 0.08);
 font-family: var(--font-mono);
 font-size: var(--text-xs);
 font-weight: 700;
 letter-spacing: 0.04em;
 text-transform: uppercase;
 transition:
 background-color var(--dur-fast) var(--ease),
 border-color var(--dur-fast) var(--ease),
 transform var(--dur-fast) var(--ease);
}
.copy-button:hover {
 transform: translateY(-1px);
 border-color: rgba(250, 249, 245, 0.35);
 background: rgba(255, 255, 255, 0.14);
}
.copy-button[data-copied="true"] {
 color: var(--color-white);
 background: rgba(120, 140, 93, 0.55);
 border-color: rgba(120, 140, 93, 0.75);
}
.reference-panel {
 --panel-pad: var(--space-5);
}
.callout {
 padding: var(--space-5);
 color: var(--text-soft);
 background: var(--surface-tint);
 border: var(--border);
 border-inline-start: 4px solid var(--accent);
 border-radius: var(--radius-md);
}
.callout[data-tone="success"] {
 border-inline-start-color: var(--success);
 background: rgba(120, 140, 93, 0.10);
}
.callout[data-tone="warning"] {
 border-inline-start-color: var(--warning);
 background: rgba(199, 142, 63, 0.11);
}
.callout[data-tone="danger"] {
 border-inline-start-color: var(--danger);
 background: rgba(176, 74, 63, 0.10);
}
.callout[data-tone="info"] {
 border-inline-start-color: var(--info);
 background: rgba(106, 140, 175, 0.11);
}
.callout-label {
 display: block;
 margin-bottom: var(--space-2);
 color: var(--text-muted);
 font-family: var(--font-mono);
 font-size: var(--text-xs);
 font-weight: 700;
 letter-spacing: 0.09em;
 text-transform: uppercase;
}
.callout > :last-child {
 margin-bottom: 0;
}
.checklist {
 list-style: none;
 margin: 0;
 padding: 0;
 display: grid;
 gap: var(--space-3);
}
.checklist li {
 display: block !important;
 position: relative !important;
 min-width: 0;
 padding-inline-start: calc(18px + var(--space-3));
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</head>
<body>
 <main class="page stack" data-gap="lg">
 <header class="stack" data-gap="sm">
 <div class="eyebrow">Benchmark comparison · GEPA seed decision</div>
 <h1>Promote Candidate B as the next seed.</h1>
 <p class="lede">Candidate B keeps the 4/4 pass rate and zero checker failures while lifting final score from 0.9175 to 0.9655. The tradeoff is higher wall time, token volume, and estimated cost.</p>
 <div class="cluster">
 <span class="chip">Decision: promote</span>
 <span class="chip">Final score +0.0480</span>
 <span class="chip">Warnings -3</span>
 <span class="chip">Cost +11.5%</span>
 </div>
 </header>
<section class="section stack" data-gap="lg">
 <div class="section-head">
 <div>
 <span class="eyebrow">First-viewport evidence</span>
 <h2>Quality improves; compliance improves; cost and latency regress.</h2>
 </div>
 </div>
<div class="auto-grid" style="--grid-min: 160px">
 <article class="stat-card"><div class="caption">Pass rate</div><div class="stat-value">100%</div><p>Both runs generated 4/4 artifacts.</p></article>
 <article class="stat-card"><div class="caption">Final score</div><div class="stat-value">0.9655</div><p>+0.0480 vs Seed A (+5.2%).</p></article>
 <article class="stat-card"><div class="caption">Checker warnings</div><div class="stat-value">2</div><p>5 → 2 (-3); failures stay at 0.</p></article>
 <article class="stat-card"><div class="caption">Wall time</div><div class="stat-value">489s</div><p>+77s (+18.7%).</p></article>
 <article class="stat-card"><div class="caption">Token total</div><div class="stat-value">124,700</div><p>+8,700 tokens (+7.5%).</p></article>
 <article class="stat-card"><div class="caption">Estimated cost</div><div class="stat-value">$2.14</div><p>+0.22 USD (+11.5%).</p></article>
 </div>
<div class="section-rail">
 <div class="stack" data-gap="md">
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 <p class="chart-caption">Source: <code>evals/benchmark-comparison/source.json</code>. Candidate B moves up and right: final score improves by +0.0480, estimated cost rises by $0.22, and wall time rises by 77s.</p>
 </section>
<div class="numeric-table-wrap">
 <table class="numeric-table">
 <thead><tr><th>Metric</th><th class="metric">Seed A</th><th class="metric">Candidate B</th><th class="metric">Delta</th></tr></thead>
 <tbody>
 <tr><td>Pass rate</td><td class="metric">100%</td><td class="metric">100%</td><td class="metric">+0%</td></tr>
 <tr><td>Final score</td><td class="metric">0.9175</td><td class="metric">0.9655</td><td class="metric">+0.0480</td></tr>
 <tr><td>Checker failures</td><td class="metric">0</td><td class="metric">0</td><td class="metric">+0</td></tr>
 <tr><td>Checker warnings</td><td class="metric">5</td><td class="metric">2</td><td class="metric">-3</td></tr>
 <tr><td>Wall time</td><td class="metric">412s</td><td class="metric">489s</td><td class="metric">+77s</td></tr>
 <tr><td>Total tokens</td><td class="metric">116,000</td><td class="metric">124,700</td><td class="metric">+8,700</td></tr>
 <tr><td>Estimated cost</td><td class="metric">$1.92</td><td class="metric">$2.14</td><td class="metric">$+0.22</td></tr>
 </tbody>
 </table>
 </div>
 </div>
 <aside class="reference-panel stack" data-gap="sm">
 <h3>Promotion rationale</h3>
 <p>Candidate B improves final score by 0.048 and reduces checker warnings from five to two without adding failures. The latency and cost increases are material but acceptable for GEPA seed quality.</p>
 <ul class="takeaway-list"><li><div>Checker warnings dropped from five to two with no generation failures.</div></li><li><div>Cost rose by 11.5% and wall time rose by 18.7%.</div></li><li><div>One code-review artifact still needs inspection for long diff wrapping.</div></li></ul>
 </aside>
 </div>
 </section>
<section class="section stack" data-gap="md">
 <div class="section-head"><div><span class="eyebrow">Per-eval deltas</span><h2>Candidate B improves every score, but every eval is slower.</h2></div></div>
 <div class="numeric-table-wrap">
 <table class="numeric-table">
 <thead><tr><th>Eval</th><th class="metric">Seed</th><th class="metric">Cand.</th><th class="metric">Score Δ</th><th class="metric">Warn Δ</th><th class="metric">Time Δ</th></tr></thead>
 <tbody>
 <tr>
 <td>numeric-data</td>
 <td class="metric">0.930</td>
 <td class="metric">0.970</td>
 <td class="metric">+0.040</td>
 <td class="metric">-1</td>
 <td class="metric">+19s</td>
 </tr>
 <tr>
 <td>code-review</td>
 <td class="metric">0.910</td>
 <td class="metric">0.955</td>
 <td class="metric">+0.045</td>
 <td class="metric">-1</td>
 <td class="metric">+19s</td>
 </tr>
 <tr>
 <td>module-explainer</td>
 <td class="metric">0.925</td>
 <td class="metric">0.944</td>
 <td class="metric">+0.019</td>
 <td class="metric">+0</td>
 <td class="metric">+21s</td>
 </tr>
 <tr>
 <td>implementation-plan</td>
 <td class="metric">0.905</td>
 <td class="metric">0.993</td>
 <td class="metric">+0.088</td>
 <td class="metric">-1</td>
 <td class="metric">+18s</td>
 </tr>
 </tbody>
 </table>
 </div>
 <ul class="insight-list"><li><div><strong>numeric-data:</strong> Candidate chart is clearer but uses more SVG text. Score delta +0.040; warnings delta -1; wall-time delta +19s.</div></li><li><div><strong>code-review:</strong> No mechanical regression; inspect finding severity wording. Score delta +0.045; warnings delta -1; wall-time delta +19s.</div></li><li><div><strong>module-explainer:</strong> Runtime path improved; mobile flow caption remains dense. Score delta +0.019; warnings delta +0; wall-time delta +21s.</div></li><li><div><strong>implementation-plan:</strong> Plan quality improved; no checker regression. Score delta +0.088; warnings delta -1; wall-time delta +18s.</div></li></ul>
 </section>
<section class="section-rail">
 <div class="stack" data-gap="md">
 <section class="section stack" data-gap="sm">
 <div class="section-head"><div><span class="eyebrow">Scoring formula</span><h2>Final score weights compliance highest.</h2></div></div>
 <div class="code-block" data-wrap="true"><code>0.30 * generation_score + 0.55 * checker_score + 0.15 * hygiene_score</code></div>
 <div class="auto-grid" style="--grid-min: 210px">
 <article class="card"><h3>Generation score</h3><p>generated_ok / total_evals. Both runs are 1.00.</p></article>
 <article class="card"><h3>Checker score</h3><p>max(0, 1 - 0.20 * checker_failures - 0.03 * checker_warnings). Candidate B improves 0.85 → 0.94.</p></article>
 <article class="card"><h3>Hygiene score</h3><p>average artifact compliance score after unsupported classes, external assets, and missing CSS penalties. Candidate B dips 1.00 → 0.99.</p></article>
 </div>
 </section>
<section class="section stack" data-gap="sm">
 <div class="section-head"><div><span class="eyebrow">Improvements and regressions</span><h2>The seed choice is quality-forward, not efficiency-forward.</h2></div></div>
 <div class="auto-grid" style="--grid-min: 240px">
 <article class="card"><h3>Improvements</h3><ul class="checklist"><li>Final score rises by +0.0480.</li><li>Checker warnings fall by 3 with no new failures.</li><li>All four per-eval scores improve.</li></ul></article>
 <article class="card"><h3>Regressions</h3><ul class="plain-list"><li>Wall time increases +18.7%.</li><li>Total tokens increase +7.5%.</li><li>Estimated cost increases +11.5%.</li><li>Hygiene score decreases by -0.01.</li></ul></article>
 </div>
 </section>
 </div>
<aside class="reference-panel stack" data-gap="sm">
 <h3>Run provenance</h3>
 <ul class="plain-list">
 <li>Timestamp: <code>2026-05-20T18:40:00Z</code></li>
 <li>Model: <code>codexresponses.gpt-5.5</code></li>
 <li>Command: <code>python3 scripts/run_skill_evals.py --skill-dir birch-html --model codexresponses.gpt-5.5 --label skill-candidate-b-gpt55</code></li>
 <li>Seed report: <code>eval-runs/reports/skill-seed-gpt55/summary.json</code></li>
 <li>Candidate report: <code>eval-runs/reports/skill-candidate-b-gpt55/summary.json</code></li>
 <li>Eval set: <code>numeric-data, code-review, module-explainer, implementation-plan</code></li>
 </ul>
 </aside>
 </section>
<section class="section stack" data-gap="md">
 <div class="section-head"><div><span class="eyebrow">Caveats</span><h2>Interpret mechanical metrics as decision support, not complete quality proof.</h2></div></div>
 <div class="auto-grid" style="--grid-min: 240px">
 <article class="card"><h3>Token comparability</h3><p>Provider token schemas differ; cached, reasoning, and effective tokens are not apples-to-apples.</p></article>
 <article class="card"><h3>Checker limitations</h3><p>Checker warnings are mechanical contract signals, not a complete human quality score.</p></article>
 <article class="card"><h3>Rendering scope</h3><p>Same:same screenshot pairs primarily validate geometry and rendering contracts, not aesthetic quality.</p></article>
 <article class="card"><h3>Timing noise</h3><p>Wall time includes model latency and harness overhead, so small differences should be treated as noisy.</p></article>
 </div>
 </section>
<section class="section stack" data-gap="md">
 <div class="section-head"><div><span class="eyebrow">Next recommended experiment</span><h2>Promote, then test transfer before broad rollout.</h2></div></div>
 <ol class="flow-list">
 <li class="flow-step"><span class="flow-num">1</span><div class="stack" data-gap="sm"><h3 class="flow-title">Promote Candidate B</h3><p class="flow-detail">Use Candidate B as the single-model GEPA seed because quality and checker compliance improved without generation failures.</p></div></li>
 <li class="flow-step"><span class="flow-num">2</span><div class="stack" data-gap="sm"><h3 class="flow-title">Inspect code-review wrapping</h3><p class="flow-detail">Manually review the remaining risk called out in Candidate B notes before committing the seed.</p></div></li>
 <li class="flow-step"><span class="flow-num">3</span><div class="stack" data-gap="sm"><h3 class="flow-title">Run transfer checks</h3><p class="flow-detail">Promote Candidate B for a single-model GEPA run, then rerun on Kimi and Gemini before broad model-suite validation. Inspect code-review diff wrapping manually before committing.</p></div></li>
 </ol>
 <p class="caption">Artifact generated from <code>evals/benchmark-comparison/source.json</code>; source files were treated as read-only.</p>
 </section>
 </main>
</body>
</html>

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