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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>SchemaForge — Structured Output Schema Builder</title>
<script>
// Prevent FOUC: Set theme early based on localStorage or system preference
const savedTheme = localStorage.getItem('schemaforge-theme');
if (savedTheme === 'dark' || (!savedTheme && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
document.documentElement.setAttribute('data-theme', 'dark');
}
</script>
<style>
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
--bg: #f8f8f6; --surface: #ffffff; --border: #ddddd8; --border-2: #c8c8c2;
--text: #1a1a18; --muted: #6b6b66; --accent: #1a56a0; --accent-lt: #e8f0fb;
--accent-dk: #134080; --green: #1a7a4a; --green-lt: #e6f5ec;
--red: #b83232; --red-lt: #fdecea; --tag-bg: #eeeee9;
--mono: "SF Mono","Fira Code","Consolas",monospace;
--sans: "Inter","Helvetica Neue",Arial,sans-serif;
--radius: 6px; --shadow: 0 1px 3px rgba(0,0,0,.08);
/* Block type colours */
--c-string: #3b82f6;
--c-number: #c0392b;
--c-integer: #f97316;
--c-boolean: #0d9488;
--c-array: #8b5cf6;
--c-object: #92400e;
/* Banners */
--warn-bg: #fffbea; --warn-border: #e8d87a; --warn-text: #7a6500;
--info-bg: var(--accent-lt); --info-border: #c0d4f0; --info-text: var(--accent-dk);
--success-bg: var(--green-lt); --success-border: #a8d5ba; --success-text: var(--green);
/* Tags & Badges */
--tag-accent-bg: var(--accent-lt); --tag-accent-border: #c0d4f0; --tag-accent-text: var(--accent-dk);
--badge-green-bg: var(--green-lt); --badge-green-border: #a8d5ba; --badge-green-text: var(--green);
--req-chip-req-bg: #e8f5e9; --req-chip-req-text: #2e7d32;
}
[data-theme="dark"] {
--bg: #121212; --surface: #1e1e1e; --border: #333333; --border-2: #444444;
--text: #e0e0e0; --muted: #a0a0a0; --accent: #3b82f6; --accent-lt: rgba(59, 130, 246, 0.15);
--accent-dk: #93c5fd; --green: #10b981; --green-lt: rgba(16, 185, 129, 0.15);
--red: #ef4444; --red-lt: rgba(239, 68, 68, 0.15); --tag-bg: #2d2d2d;
--shadow: 0 1px 3px rgba(0,0,0,.3);
/* Block type colours for dark theme */
--c-string: #60a5fa;
--c-number: #e74c3c;
--c-integer: #fb923c;
--c-boolean: #2dd4bf;
--c-array: #a78bfa;
--c-object: #b45309;
/* Desaturated pastel backgrounds for dark mode */
--c-string-lt: rgba(96, 165, 250, 0.1);
--c-number-lt: rgba(192, 57, 43, 0.1);
--c-integer-lt: rgba(249, 115, 22, 0.1);
--c-boolean-lt: rgba(45, 212, 191, 0.1);
--c-array-lt: rgba(167, 139, 250, 0.1);
--c-object-lt: rgba(180, 83, 9, 0.1);
/* Banners */
--warn-bg: rgba(251, 191, 36, 0.1); --warn-border: rgba(251, 191, 36, 0.3); --warn-text: #fbbf24;
--info-bg: rgba(59, 130, 246, 0.1); --info-border: rgba(59, 130, 246, 0.3); --info-text: #60a5fa;
--success-bg: rgba(16, 185, 129, 0.1); --success-border: rgba(16, 185, 129, 0.3); --success-text: #34d399;
/* Tags & Badges */
--tag-accent-bg: rgba(59, 130, 246, 0.15); --tag-accent-border: rgba(59, 130, 246, 0.3); --tag-accent-text: #93c5fd;
--badge-green-bg: rgba(16, 185, 129, 0.15); --badge-green-border: rgba(16, 185, 129, 0.3); --badge-green-text: #34d399;
--req-chip-req-bg: rgba(16, 185, 129, 0.15); --req-chip-req-text: #34d399;
}
html { font-size: 15px; }
body { font-family: var(--sans); background: var(--bg); color: var(--text); min-height:100vh; line-height:1.55; }
h2 { font-size: 1.05rem; font-weight: 600; }
label { font-size: .85rem; font-weight: 500; color: var(--muted); display: block; margin-bottom: .3rem; }
small { font-size: .78rem; color: var(--muted); }
header {
background: var(--surface); border-bottom: 1px solid var(--border);
padding: .9rem 2rem; display: flex; align-items: center; justify-content: space-between;
position: sticky; top: 0; z-index: 100;
}
.header-left { display: flex; align-items: center; gap: 1rem; }
.header-right { display: flex; align-items: center; gap: 1rem; }
.theme-toggle-btn {
background: transparent; border: none; cursor: pointer; padding: .4rem;
border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
color: var(--muted); transition: background .15s, color .15s;
}
.theme-toggle-btn:hover { background: var(--tag-bg); color: var(--text); }
.theme-toggle-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle-btn .moon-icon { display: block; }
.theme-toggle-btn .sun-icon { display: none; }
[data-theme="dark"] .theme-toggle-btn .moon-icon { display: none; }
[data-theme="dark"] .theme-toggle-btn .sun-icon { display: block; }
.logo-mark {
width: 32px; height: 32px; background: var(--accent); border-radius: 7px;
display: flex; align-items: center; justify-content: center;
}
.logo-mark svg { width: 18px; height: 18px; fill: #fff; }
.logo-text { font-size: 1.05rem; font-weight: 700; letter-spacing: -.01em; }
.logo-text span { color: var(--accent); }
.paper-link, .author-link { color: var(--muted); text-decoration: none; transition: color .15s; border-bottom: 1px solid transparent; }
.paper-link:hover, .author-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.app-shell { display: grid; grid-template-columns: var(--left-width, 1fr) auto var(--right-width, 430px); min-height: calc(100vh - 53px); }
.left-panel { padding: 2rem 2.5rem; overflow-y: auto; border-right: 1px solid var(--border); }
.right-panel {
background: #1e1e2e; display: flex; flex-direction: column;
position: sticky; top: 53px; height: calc(100vh - 53px); overflow: hidden;
}
/* ── Resize divider ────────────────────────────────────────── */
.resize-divider {
width: 6px; background: transparent; cursor: col-resize;
border-left: 1px solid var(--border); border-right: 1px solid var(--border);
position: relative; user-select: none; flex-shrink: 0;
transition: background .15s, border-color .15s;
}
.resize-divider:hover {
background: var(--accent-lt); border-color: var(--accent);
}
.resize-divider.active {
background: var(--accent-lt); border-color: var(--accent);
}
.steps-nav {
display: flex; margin-bottom: 2rem;
border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.step-tab {
flex: 1; padding: .55rem .4rem; font-size: .78rem; font-weight: 500;
text-align: center; cursor: pointer; background: var(--surface); color: var(--muted);
border: none; border-right: 1px solid var(--border); line-height: 1.3; transition: background .15s;
}
.step-tab:last-child { border-right: none; }
.step-tab .step-num { display: block; font-size: .65rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); margin-bottom: .15rem; }
.step-tab.active { background: var(--accent); color: #fff; }
.step-tab.active .step-num { color: rgba(255,255,255,.7); }
.step-tab.done { background: var(--green-lt); color: var(--green); }
.step-tab.done .step-num { color: var(--green); }
.step-panel { display: none; }
.step-panel.active { display: block; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem 1.4rem; margin-bottom: 1rem; box-shadow: var(--shadow); }
.card-title { font-size: .9rem; font-weight: 600; margin-bottom: .9rem; padding-bottom: .6rem; border-bottom: 1px solid var(--border); }
input[type="text"], input[type="number"], textarea, select {
width: 100%; padding: .5rem .7rem; font-family: var(--sans); font-size: .88rem;
border: 1px solid var(--border-2); border-radius: var(--radius); background: var(--surface);
color: var(--text); outline: none; transition: border-color .15s;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-lt); }
textarea { resize: vertical; min-height: 70px; }
.form-row { margin-bottom: .85rem; }
.form-row-inline { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-bottom: .85rem; }
.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .5rem 1rem; font-family: var(--sans); font-size: .85rem; font-weight: 500; border-radius: var(--radius); border: none; cursor: pointer; transition: background .15s, transform .1s; }
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dk); }
.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border-2); }
.btn-secondary:hover { background: var(--bg); }
.btn-success { background: var(--green); color: #fff; font-size: .9rem; padding: .65rem 1.4rem; }
.btn-success:hover { background: #155e38; }
.btn-ghost { background: transparent; color: var(--muted); padding: .3rem .5rem; font-size: .8rem; }
.btn-ghost:hover { color: var(--text); background: var(--tag-bg); }
.btn-sm { padding: .3rem .65rem; font-size: .78rem; }
.btn-danger-ghost { background: transparent; color: var(--red); padding: .3rem .5rem; font-size: .78rem; border: 1px solid transparent; border-radius: var(--radius); cursor: pointer; font-family: var(--sans); }
.btn-danger-ghost:hover { background: var(--red-lt); border-color: #e8a0a0; }
/* ── Provider cards ─────────────────────────────────────── */
.provider-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: .6rem; }
.provider-card { border: 2px solid var(--border); border-radius: var(--radius); padding: .7rem 1rem; cursor: pointer; background: var(--surface); display: flex; align-items: center; gap: .65rem; transition: border-color .15s, background .15s; position: relative; }
.provider-card:hover { border-color: var(--accent); background: var(--accent-lt); }
.provider-card.selected { border-color: var(--accent); background: var(--accent-lt); }
.provider-card.disabled { opacity: .4; cursor: not-allowed; }
.provider-card.disabled:hover { border-color: var(--border); background: var(--surface); }
.provider-logo { width: 28px; height: 28px; border-radius: 5px; display: flex; align-items: center; justify-content: center; font-size: .7rem; font-weight: 800; color: #fff; flex-shrink: 0; overflow: hidden; }
.provider-logo img { width: 100%; height: 100%; object-fit: contain; display: block; }
.provider-name { font-size: .85rem; font-weight: 600; }
.provider-note { font-size: .7rem; color: var(--muted); }
/* ── Type picker palette ────────────────────────────────── */
.type-palette-row {
display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: 1.2rem;
padding: .75rem 1rem; background: var(--bg); border: 1px solid var(--border);
border-radius: var(--radius);
}
.type-palette-row label {
width: 100%; font-size: .72rem; font-weight: 700; text-transform: uppercase;
letter-spacing: .06em; color: var(--muted); margin-bottom: .2rem;
}
.palette-btn {
display: inline-flex; align-items: center; gap: .35rem;
padding: .32rem .7rem; border-radius: 5px; border: 2px solid transparent;
font-family: var(--mono); font-size: .78rem; font-weight: 700;
cursor: pointer; transition: opacity .12s, transform .1s; color: #fff;
}
.palette-btn:hover { opacity: .85; transform: translateY(-1px); }
.palette-btn:active { transform: scale(.96); }
.palette-btn[data-type="string"] { background: var(--c-string); }
.palette-btn[data-type="number"] { background: #c0392b; color: #fff; }
.palette-btn[data-type="integer"] { background: var(--c-integer); }
.palette-btn[data-type="boolean"] { background: var(--c-boolean); }
.palette-btn[data-type="array"] { background: var(--c-array); }
.palette-btn[data-type="object"] { background: var(--c-object); }
.palette-btn .pal-icon { font-size: .9rem; }
/* ── Field blocks ───────────────────────────────────────── */
.field-list { margin-bottom: .5rem; }
.field-block {
border-radius: var(--radius); margin-bottom: .55rem;
background: var(--surface); overflow: hidden;
box-shadow: var(--shadow); border: 1.5px solid var(--border);
transition: box-shadow .15s;
}
/* ── Drag-and-drop indicators ───────────────────────────────── */
.field-drop-zone { position: relative; }
.drop-indicator {
height: 3px; border-radius: 2px;
background: var(--accent);
opacity: 0; pointer-events: none;
transition: opacity .08s;
margin: 1px 0;
}
.field-drop-zone.drop-before .drop-indicator-top { opacity: 1; }
.field-drop-zone.drop-after .drop-indicator-bottom { opacity: 1; }
/* "drop into object/array" centre-zone highlight */
.drop-into-overlay {
position: absolute; inset: 0; border-radius: var(--radius);
border: 2px dashed var(--accent);
background: var(--accent-lt);
opacity: 0; pointer-events: none;
transition: opacity .08s;
display: flex; align-items: center; justify-content: center;
}
.drop-into-overlay span {
font-size: .72rem; font-weight: 700; color: var(--accent);
background: var(--surface); padding: .1rem .45rem; border-radius: 3px;
pointer-events: none;
}
.field-drop-zone.drop-into .drop-into-overlay { opacity: 1; }
/* Sublist empty drop target */
.sublist-drop-zone {
min-height: 6px; border-radius: var(--radius);
transition: min-height .1s, background .1s, border .1s;
}
.sublist-drop-zone.active {
min-height: 32px; background: var(--accent-lt);
border: 2px dashed var(--accent);
display: flex; align-items: center; justify-content: center;
}
.sublist-drop-zone.active::after {
content: 'drop here to append';
font-size: .7rem; font-weight: 600; color: var(--accent);
}
.field-block[data-ftype="string"] { border-left: 4px solid var(--c-string); }
.field-block[data-ftype="number"] { border-left: 4px solid var(--c-number); }
.field-block[data-ftype="integer"] { border-left: 4px solid var(--c-integer); }
.field-block[data-ftype="boolean"] { border-left: 4px solid var(--c-boolean); }
.field-block[data-ftype="array"] { border-left: 4px solid var(--c-array); }
.field-block[data-ftype="object"] { border-left: 4px solid var(--c-object); }
.field-block-header {
display: flex; align-items: center; gap: .5rem;
padding: .55rem .75rem .55rem .6rem;
cursor: pointer; user-select: none;
background: var(--bg); border-bottom: 1px solid transparent;
}
.field-block-header.open { border-bottom-color: var(--border); }
.drag-handle {
cursor: grab; color: var(--muted); font-size: .85rem; padding: 0 .2rem;
line-height: 1; flex-shrink: 0;
}
.drag-handle:active { cursor: grabbing; }
.type-dot {
width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0;
}
.type-dot[data-ftype="string"] { background: var(--c-string); }
.type-dot[data-ftype="number"] { background: var(--c-number); }
.type-dot[data-ftype="integer"] { background: var(--c-integer); }
.type-dot[data-ftype="boolean"] { background: var(--c-boolean); }
.type-dot[data-ftype="array"] { background: var(--c-array); }
.type-dot[data-ftype="object"] { background: var(--c-object); }
.field-name-badge {
font-family: var(--mono); font-size: .82rem; font-weight: 700; flex: 1;
color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.field-name-placeholder { color: var(--muted); font-style: italic; }
.type-chip {
font-size: .68rem; font-weight: 700; padding: .12rem .42rem; border-radius: 4px;
color: #fff; flex-shrink: 0;
}
.type-chip[data-ftype="string"] { background: var(--c-string); }
.type-chip[data-ftype="number"] { background: var(--c-number); color: #fff; }
.type-chip[data-ftype="integer"] { background: var(--c-integer); }
.type-chip[data-ftype="boolean"] { background: var(--c-boolean); }
.type-chip[data-ftype="array"] { background: var(--c-array); }
.type-chip[data-ftype="object"] { background: var(--c-object); }
.req-chip {
font-size: .63rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
padding: .1rem .35rem; border-radius: 3px; flex-shrink: 0;
}
.req-chip.req { background: var(--req-chip-req-bg); color: var(--req-chip-req-text); }
.req-chip.opt { background: var(--tag-bg); color: var(--muted); }
.field-chevron { color: var(--muted); font-size: .7rem; transition: transform .2s; flex-shrink: 0; }
.field-chevron.open { transform: rotate(90deg); }
.field-block-body { padding: .9rem 1rem 1rem; display: none; }
.field-block-body.open { display: block; }
/* type selector inside expanded block */
.type-btn-group { display: flex; gap: .3rem; flex-wrap: wrap; margin-bottom: .85rem; }
.type-btn {
padding: .26rem .6rem; font-family: var(--mono); font-size: .74rem; font-weight: 700;
border: 2px solid var(--border-2); border-radius: 4px; background: var(--surface);
color: var(--muted); cursor: pointer; transition: all .1s;
}
.type-btn:hover { border-color: var(--accent); color: var(--accent); }
.type-btn.active[data-t="string"] { background: var(--c-string); border-color: var(--c-string); color: #fff; }
.type-btn.active[data-t="number"] { background: var(--c-number); border-color: var(--c-number); color: #fff; }
.type-btn.active[data-t="integer"] { background: var(--c-integer); border-color: var(--c-integer); color: #fff; }
.type-btn.active[data-t="boolean"] { background: var(--c-boolean); border-color: var(--c-boolean); color: #fff; }
.type-btn.active[data-t="array"] { background: var(--c-array); border-color: var(--c-array); color: #fff; }
.type-btn.active[data-t="object"] { background: var(--c-object); border-color: var(--c-object); color: #fff; }
.toggle-row { display: flex; align-items: center; gap: .5rem; margin-bottom: .6rem; flex-wrap: wrap; }
.toggle { position: relative; width: 34px; height: 18px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-track { position: absolute; inset: 0; background: var(--border-2); border-radius: 9px; cursor: pointer; transition: background .2s; }
.toggle input:checked + .toggle-track { background: var(--accent); }
.toggle-thumb { position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; background: #fff; border-radius: 50%; transition: transform .2s; pointer-events: none; }
.toggle input:checked ~ .toggle-thumb { transform: translateX(16px); }
.toggle-label { font-size: .82rem; color: var(--text); }
.enum-editor { margin-top: .5rem; }
.enum-tag-list { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: .5rem; min-height: 28px; }
.enum-tag { display: inline-flex; align-items: center; gap: .3rem; background: var(--tag-accent-bg); color: var(--tag-accent-text); border: 1px solid var(--tag-accent-border); border-radius: 4px; padding: .18rem .5rem; font-size: .78rem; font-family: var(--mono); font-weight: 500; }
.enum-tag-x { cursor: pointer; color: var(--accent); font-size: .7rem; line-height: 1; }
.enum-tag-x:hover { color: var(--red); }
.enum-add-row { display: flex; gap: .4rem; }
.enum-add-row input { flex: 1; }
.array-config { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: .75rem; margin-top: .5rem; }
/* ── Numeric constraints ─────────────────────────────────────── */
.constraint-mode-group { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: .85rem; }
.constraint-radio { display: flex; align-items: center; gap: .35rem; }
.constraint-radio input[type="radio"] { cursor: pointer; }
.constraint-radio label { margin: 0; cursor: pointer; font-size: .85rem; font-weight: 400; }
.numeric-config { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: .75rem; margin-top: .5rem; }
.range-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.grid-textarea { width: 100%; min-height: 80px; font-family: var(--mono); font-size: .82rem; }
.grid-tag-list { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: .5rem; min-height: 28px; }
.grid-tag { display: inline-flex; align-items: center; gap: .3rem; background: var(--tag-accent-bg); color: var(--tag-accent-text); border: 1px solid var(--tag-accent-border); border-radius: 4px; padding: .18rem .5rem; font-size: .78rem; font-family: var(--mono); font-weight: 500; }
.grid-tag-x { cursor: pointer; color: var(--accent); font-size: .7rem; line-height: 1; }
.grid-tag-x:hover { color: var(--red); }
.boolean-constraint-badge { display: inline-block; background: var(--badge-green-bg); color: var(--badge-green-text); border: 1px solid var(--badge-green-border); border-radius: 4px; padding: .2rem .6rem; font-size: .78rem; font-weight: 600; margin-top: .5rem; }
/* ── Nested / object sub-fields ─────────────────────────── */
.subfields-wrapper {
margin-top: .85rem;
border: 1.5px solid var(--c-object);
border-radius: var(--radius);
overflow: hidden;
}
.subfields-header {
display: flex; align-items: center; justify-content: space-between;
padding: .4rem .75rem; background: var(--c-object-lt);
border-bottom: 1px solid rgba(13,148,136,.2);
font-size: .78rem; font-weight: 700; color: var(--c-object);
}
.subfields-body { padding: .6rem .75rem .75rem; }
.subfields-body .field-block { border-left-width: 3px; }
.subfields-body .field-list { margin-bottom: .35rem; }
.no-subfields-hint {
font-size: .78rem; color: var(--muted); text-align: center;
padding: .6rem; border: 1.5px dashed var(--border); border-radius: 4px;
margin-bottom: .5rem;
}
/* ── Empty state ────────────────────────────────────────── */
.empty-schema {
text-align: center; padding: 2.5rem 1.5rem; color: var(--muted);
border: 2px dashed var(--border); border-radius: var(--radius);
margin-bottom: 1rem;
}
.empty-schema .empty-icon { font-size: 2rem; margin-bottom: .6rem; display: block; opacity: .4; }
.empty-schema strong { display: block; font-weight: 600; color: var(--text); margin-bottom: .8rem; }
.empty-schema p { font-size: .82rem; line-height: 1.6; max-width: 95%; margin: 0 auto; }
.type-badge {
display: inline-flex; align-items: center; padding: .22rem .55rem; border-radius: 4px;
font-family: var(--mono); font-size: .72rem; font-weight: 700; color: #fff;
margin: 0 .15rem; white-space: nowrap;
}
.type-badge[data-type="string"] { background: var(--c-string); }
.type-badge[data-type="number"] { background: #c0392b; color: #fff; }
.type-badge[data-type="integer"] { background: var(--c-integer); }
.type-badge[data-type="boolean"] { background: var(--c-boolean); }
.type-badge[data-type="array"] { background: var(--c-array); }
.type-badge[data-type="object"] { background: var(--c-object); }
/* ── Banners ────────────────────────────────────────────── */
.warn-banner { display: flex; align-items: flex-start; gap: .5rem; background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: var(--radius); padding: .65rem .9rem; font-size: .8rem; color: var(--warn-text); margin-bottom: .85rem; }
.info-banner { display: flex; align-items: flex-start; gap: .5rem; background: var(--info-bg); border: 1px solid var(--info-border); border-radius: var(--radius); padding: .65rem .9rem; font-size: .8rem; color: var(--info-text); margin-bottom: .85rem; }
.success-banner { display: flex; align-items: flex-start; gap: .5rem; background: var(--success-bg); border: 1px solid var(--success-border); border-radius: var(--radius); padding: .65rem .9rem; font-size: .8rem; color: var(--success-text); margin-bottom: .85rem; }
/* ── Tooltip ────────────────────────────────────────────── */
.tooltip-wrapper { position: relative; display: inline-block; }
.tooltip-icon { display: inline-block; width: 16px; height: 16px; border-radius: 50%; background: var(--muted); color: #fff; font-size: .65rem; font-weight: 700; line-height: 1.5; text-align: center; cursor: help; margin-left: .3rem; transition: background .15s; }
.tooltip-icon:hover { background: var(--accent); }
.tooltip-text {
visibility: hidden; background: #2a2a3e; color: #f0f0f8; text-align: left; padding: .6rem .8rem;
border-radius: 5px; font-size: .78rem; line-height: 1.5; position: absolute; z-index: 1000;
bottom: 125%; left: 50%; transform: translateX(-50%); width: 220px; opacity: 0;
transition: opacity .2s; border: 1px solid #3d3d5c; box-shadow: 0 4px 12px rgba(0,0,0,.25);
}
.tooltip-text::after { content: ""; position: absolute; top: 100%; left: 50%; margin-left: -5px; border-width: 5px; border-style: solid; border-color: #2a2a3e transparent transparent transparent; }
.tooltip-wrapper:hover .tooltip-text, .tooltip-wrapper:focus-within .tooltip-text { visibility: visible; opacity: 1; }
/* ── Field-level hover tooltips (constraint options, labels, etc.) ── */
.constraint-option-wrapper {
display: flex; align-items: center; gap: .35rem; cursor: pointer;
padding: .35rem .4rem; border-radius: 4px; position: relative;
transition: background-color .15s ease;
}
.constraint-option-wrapper:hover { background-color: var(--accent-lt); }
.constraint-option-wrapper:hover .tooltip-text { visibility: visible; opacity: 1; }
.constraint-option-wrapper .tooltip-text {
visibility: hidden; opacity: 0; top: auto; bottom: 100%; left: 0; transform: none; width: 240px;
margin-bottom: .5rem; border-radius: 5px; position: absolute; z-index: 1000;
transition: opacity .2s ease;
}
.constraint-option-wrapper .tooltip-text::after {
content: ""; position: absolute; bottom: auto; top: 100%; left: 10px; margin-left: 0;
border-width: 5px; border-style: solid; border-color: #2a2a3e transparent transparent transparent;
}
.label-with-tooltip {
display: inline-flex; align-items: center; gap: .3rem; cursor: pointer;
padding: .2rem .3rem; border-radius: 3px; position: relative;
transition: background-color .15s ease;
}
.label-with-tooltip:hover { background-color: var(--accent-lt); }
.label-with-tooltip:hover .tooltip-text { visibility: visible; opacity: 1; }
.label-with-tooltip .tooltip-text {
visibility: hidden; opacity: 0; top: auto; bottom: 100%; left: 0; transform: none; width: 280px;
margin-bottom: .5rem; border-radius: 5px; position: absolute; z-index: 1000;
transition: opacity .2s ease;
}
.label-with-tooltip .tooltip-text::after {
content: ""; position: absolute; bottom: auto; top: 100%; left: 10px; margin-left: 0;
border-width: 5px; border-style: solid; border-color: #2a2a3e transparent transparent transparent;
}
.toggle:disabled { opacity: .5; cursor: not-allowed; }
.toggle input:disabled + .toggle-track { cursor: not-allowed; }
.temp-row { display: flex; align-items: center; gap: .75rem; }
.temp-row input[type="range"] { flex: 1; accent-color: var(--accent); border: none; padding: 0; box-shadow: none; }
.temp-val { font-family: var(--mono); font-size: .85rem; font-weight: 600; color: var(--accent); width: 28px; text-align: right; }
.step-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border); }
/* ── Preview panel ──────────────────────────────────────── */
.preview-header { display: flex; align-items: center; justify-content: space-between; padding: .75rem 1rem; border-bottom: 1px solid #2d2d44; flex-shrink: 0; }
.preview-title { font-size: .78rem; font-weight: 600; color: #a0a0c0; letter-spacing: .04em; text-transform: uppercase; }
.preview-tabs { display: flex; gap: .2rem; }
.preview-tab { font-size: .72rem; padding: .25rem .6rem; border-radius: 4px; border: 1px solid transparent; cursor: pointer; color: #707090; background: transparent; font-family: var(--sans); }
.preview-tab:hover { color: #a0a0c0; }
.preview-tab.active { background: #2d2d44; color: #e0e0f0; border-color: #3d3d5c; }
.preview-action-btn { display: flex; align-items: center; justify-content: center; background: transparent; border: 1px solid #3d3d5c; color: #8080a0; padding: .35rem; border-radius: 4px; cursor: pointer; transition: all .15s; }
.preview-action-btn:hover { background: #2d2d44; color: #c0c0e0; }
.preview-action-btn.copied { color: #6ec97e; border-color: #6ec97e; }
#code-output, #schema-output {
flex: 1; overflow-y: auto; padding: 1rem 1.1rem;
font-family: var(--mono); font-size: .76rem; line-height: 1.65;
color: #cdd6f4; white-space: pre; tab-size: 4;
}
#code-output::-webkit-scrollbar, #schema-output::-webkit-scrollbar { width: 5px; }
#code-output::-webkit-scrollbar-thumb, #schema-output::-webkit-scrollbar-thumb { background: #3d3d5c; border-radius: 3px; }
.tok-kw { color: #cba6f7; }
.tok-str { color: #a6e3a1; }
.tok-num { color: #fab387; }
.tok-cmt { color: #6c7086; font-style: italic; }
.tok-fn { color: #89b4fa; }
.tok-bool{ color: #fab387; }
.preview-placeholder { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #404060; text-align: center; padding: 2rem; }
.preview-placeholder svg { opacity: .25; margin-bottom: 1rem; }
.preview-placeholder p { font-size: .82rem; line-height: 1.5; }
.generate-area { padding: .75rem 1rem; border-top: 1px solid #2d2d44; flex-shrink: 0; }
code { font-family: var(--mono); font-size: .82rem; background: var(--tag-bg); padding: .1rem .3rem; border-radius: 3px; }
@media (max-width: 900px) {
.app-shell { grid-template-columns: 1fr; }
.resize-divider { display: none; }
.right-panel { position: static; height: 500px; }
}
</style>
</head>
<body>
<header>
<div class="header-left">
<div class="logo-mark">
<svg viewBox="0 0 24 24"><path d="M4 4h4v4H4zm6 0h4v4h-4zm6 0h4v4h-4zM4 10h4v4H4zm6 0h10v4H10zM4 16h16v4H4z"/></svg>
</div>
<div>
<div class="logo-text"><span>Schema</span>Forge</div>
</div>
<div style="font-size: .85rem; color: var(--muted); margin-left: 1rem; border-left: 1px solid var(--border); padding-left: 1rem; display: flex; align-items: center; white-space: nowrap;">
<span style="opacity: 0.75;">source:</span>
<a href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5636430" target="_blank" rel="noopener" class="paper-link" style="margin-left: 0.4rem; font-family: var(--mono); font-weight: 500;">Structured Data with LLMs Done Right</a>
<span style="margin: 0 0.8rem; opacity: 0.6;">·</span>
<span style="opacity: 0.75;">by:</span>
<a href="https://jesusvillota.github.io/" target="_blank" rel="noopener" class="author-link" style="margin-left: 0.4rem; font-family: var(--mono); font-weight: 500;">Jesus Villota</a>
</div>
</div>
<div class="header-right">
<button class="theme-toggle-btn" id="theme-toggle" title="Toggle dark mode" onclick="toggleTheme()">
<svg class="sun-icon" viewBox="0 0 24 24"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg>
<svg class="moon-icon" viewBox="0 0 24 24"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/></svg>
</button>
</div>
</header>
<div class="app-shell">
<!-- LEFT PANEL -->
<div class="left-panel">
<nav class="steps-nav">
<button class="step-tab active" data-step="1" onclick="goStep(1)"><span class="step-num">Step 1</span>Provider</button>
<button class="step-tab" data-step="2" onclick="goStep(2)"><span class="step-num">Step 2</span>Schema Builder</button>
<button class="step-tab" data-step="3" onclick="goStep(3)"><span class="step-num">Step 3</span>Prompt</button>
</nav>
<!-- STEP 1 — Provider + Model -->
<div class="step-panel active" id="step-1">
<div class="card">
<div class="card-title">LLM Provider</div>
<div class="provider-grid">
<div class="provider-card selected" id="prov-openai" onclick="selectProvider('openai')">
<div class="provider-logo"><img src="logos/symbol.svg" alt="OpenAI" /></div>
<div><div class="provider-name">OpenAI (GPT)</div><div class="provider-note">GPT-4o, GPT-4o-mini</div></div>
</div>
<div class="provider-card" id="prov-groq" onclick="selectProvider('groq')">
<div class="provider-logo"><img src="logos/groq-icon-logo-png_seeklogo-605779.png" alt="Groq" /></div>
<div><div class="provider-name">GroqCloud</div><div class="provider-note">GPT-OSS 120B, Kimi K2, Llama 4 Scout</div></div>
</div>
<div class="provider-card" id="prov-anthropic" onclick="selectProvider('anthropic')">
<div class="provider-logo"><img src="logos/claude.jpeg" alt="Anthropic" /></div>
<div><div class="provider-name">Anthropic (Claude)</div><div class="provider-note">Claude 4.5 & 4.6 (Opus, Sonnet, Haiku)</div></div>
</div>
<div class="provider-card" id="prov-gemini" onclick="selectProvider('gemini')">
<div class="provider-logo"><img src="logos/gemini-color.png" alt="Gemini" /></div>
<div><div class="provider-name">Google (Gemini)</div><div class="provider-note">Gemini 3.1 Pro, Gemini 2.5, 2.0 Flash</div></div>
</div>
<div class="provider-card" id="prov-mistral" onclick="selectProvider('mistral')">
<div class="provider-logo"><img src="logos/Mistral_AI_logo_(2025–).svg.png" alt="Mistral" /></div>
<div><div class="provider-name">Mistral</div><div class="provider-note">Mistral Large, Small</div></div>
</div>
<div class="provider-card" id="prov-deepseek" onclick="selectProvider('deepseek')">
<div class="provider-logo"><img src="logos/deepseek-color.png" alt="DeepSeek" /></div>
<div><div class="provider-name">DeepSeek</div><div class="provider-note">DeepSeek Chat, Reasoner</div></div>
</div>
<div class="provider-card" id="prov-llama" onclick="selectProvider('llama')">
<div class="provider-logo"><img src="logos/llama.png" alt="Meta Llama" /></div>
<div><div class="provider-name">Meta (Llama)</div><div class="provider-note">Llama 4 Maverick, Llama 3.3</div></div>
</div>
<div class="provider-card" id="prov-xai" onclick="selectProvider('xai')">
<div class="provider-logo"><img src="logos/XAI_Logo.svg.png" alt="xAI" /></div>
<div><div class="provider-name">xAI (Grok)</div><div class="provider-note">Grok 4.1 Fast, Grok 4 Fast</div></div>
</div>
</div>
</div>
<div class="card">
<div class="card-title">Model</div>
<div class="form-row">
<label for="model-select">Select model</label>
<select id="model-select" onchange="onModelChange()"></select>
</div>
<div id="openai-mode-container" class="form-row" style="margin-top: 1.2rem;">
<label class="label-with-tooltip" style="display: inline-flex; width: fit-content; margin-bottom: 0.5rem;">
OpenAI Output Mode
<span class="tooltip-text" style="font-weight: normal; white-space: normal;">
OpenAI supports three methods for structured outputs.<br><br>• <strong>Pydantic (SDK Parse):</strong> Uses <code>client.chat.completions.parse()</code> with a Pydantic model. Includes built-in refusal detection and auto-parsed output. Recommended by OpenAI.<br><br>• <strong>Responses API (Pydantic):</strong> Uses the newer <code>client.responses.parse()</code> with a Pydantic model. Supports refusal detection via content items.<br><br>• <strong>Raw JSON Schema:</strong> Uses <code>response_format</code> with a raw JSON Schema dict. Manual <code>json.loads()</code> parsing.
</span>
</label>
<select id="openai-mode-select" onchange="refreshPreview()">
<option value="pydantic">Pydantic (SDK Parse) - Recommended</option>
<option value="responses">Responses API (Pydantic)</option>
<option value="json_schema">Raw JSON Schema</option>
</select>
</div>
<div id="groq-mode-container" class="form-row" style="display:none; margin-top: 1.2rem;">
<label class="label-with-tooltip" style="display: inline-flex; width: fit-content; margin-bottom: 0.5rem;">
Groq Output Mode
<span class="tooltip-text" style="font-weight: normal; white-space: normal;">
Groq supports two methods for structured outputs.<br><br>• <strong>Pydantic (SDK Parse):</strong> Uses <code>client.chat.completions.parse()</code> with a Pydantic model. Includes built-in refusal detection and auto-parsed output.<br><br>• <strong>Raw JSON Schema:</strong> Uses <code>response_format</code> with a raw JSON Schema dict. Manual <code>json.loads()</code> parsing.
</span>
</label>
<select id="groq-mode-select" onchange="refreshPreview()">
<option value="pydantic">Pydantic (SDK Parse) - Recommended</option>
<option value="json_schema">Raw JSON Schema</option>
</select>
</div>
<div id="mistral-mode-container" class="form-row" style="display:none; margin-top: 1.2rem;">
<label class="label-with-tooltip" style="display: inline-flex; width: fit-content; margin-bottom: 0.5rem;">
Mistral Output Mode
<span class="tooltip-text" style="font-weight: normal; white-space: normal;">
Mistral supports two methods for structured outputs.<br><br>• <strong>Custom Structured Outputs (Pydantic):</strong> Enforces specific format with correct typing. Recommended by Mistral.<br><br>• <strong>JSON Mode:</strong> Ensures valid JSON output with flexible structure. Uses raw JSON Schema.
</span>
</label>
<select id="mistral-mode-select" onchange="refreshPreview()">
<option value="pydantic">Custom Structured Outputs (Pydantic) - Recommended</option>
<option value="json_mode">JSON Mode</option>
</select>
</div>
<div id="anthropic-mode-container" class="form-row" style="display:none; margin-top: 1.2rem;">
<label class="label-with-tooltip" style="display: inline-flex; width: fit-content; margin-bottom: 0.5rem;">
Anthropic Output Mode
<span class="tooltip-text" style="font-weight: normal; white-space: normal;">
Anthropic supports two methods for structured outputs.<br><br>• <strong>Pydantic (SDK Parse):</strong> Uses <code>client.messages.parse()</code> with a Pydantic model. The SDK auto-transforms the schema, validates the response, and returns a typed object. Recommended by Anthropic.<br><br>• <strong>Raw JSON Schema:</strong> Uses <code>output_config.format</code> with raw JSON Schema. More direct but no SDK-level validation.
</span>
</label>
<select id="anthropic-mode-select" onchange="refreshPreview()">
<option value="pydantic">Pydantic (SDK Parse) - Recommended</option>
<option value="json_schema">Raw JSON Schema</option>
</select>
</div>
<div id="model-warning" class="warn-banner" style="display:none;">⚠️ <span id="model-warning-text"></span></div>
<div id="model-info" class="success-banner" style="display:none;">✓ <span id="model-info-text"></span></div>
<div id="anthropic-constraints-warning" class="warn-banner" style="display:none;">
<svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" style="flex-shrink:0;margin-top:.1rem"><path d="M12 2L2 20h20L12 2z"/><path d="M12 9v4M12 17h.01"/></svg>
<span id="anthropic-constraints-text"></span>
</div>
<div id="xai-constraints-warning" class="warn-banner" style="display:none;">
<svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" style="flex-shrink:0;margin-top:.1rem"><path d="M12 2L2 20h20L12 2z"/><path d="M12 9v4M12 17h.01"/></svg>
<span id="xai-constraints-text"></span>
</div>
<div id="strict-mode-info" class="info-banner" style="display:none;">
<svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" style="flex-shrink:0;margin-top:.1rem"><circle cx="12" cy="12" r="10"/><path d="M12 16v-4M12 8h.01"/></svg>
<span><strong>Strict Mode Enabled:</strong> All fields are required in the output. Use the <strong>Nullable</strong> toggle to allow fields to be null.</span>
</div>
</div>
<div class="step-footer">
<span></span>
<button class="btn btn-primary" onclick="goStep(2)">Next: Build Schema →</button>
</div>
</div>
<!-- STEP 2 — Schema Builder (free-form) -->
<div class="step-panel" id="step-2">
<!-- Example schema attribution banner -->
<div class="info-banner" id="example-banner">
<svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" style="flex-shrink:0;margin-top:.1rem"><circle cx="12" cy="12" r="10"/><path d="M12 16v-4M12 8h.01"/></svg>
<span>
Loaded example: firm-level shock parser from
<a href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5006857" target="_blank" rel="noopener" style="color:var(--accent-dk);font-weight:600;">Villota (2024)</a>
— edit freely or
<button onclick="clearSchema()" style="background:none;border:none;padding:0;font:inherit;font-size:.8rem;color:var(--accent-dk);font-weight:600;cursor:pointer;text-decoration:underline;">clear the schema</button>
to start from scratch.
</span>
</div>
<div class="card">
<div class="card-title" style="display:flex;justify-content:space-between;align-items:center;">
<span>Schema name</span>
<button class="btn btn-secondary" style="font-size:.75rem;padding:.3rem .7rem;" onclick="clearSchema()" title="Remove all fields and reset schema name">Clear schema</button>
</div>
<div class="form-row">
<label for="schema-name">Used as the JSON Schema identifier (snake_case recommended)</label>
<input type="text" id="schema-name" placeholder="e.g. my_output_schema" oninput="refreshPreview()" />
</div>
</div>
<!-- Type picker palette -->
<div class="type-palette-row" id="type-palette">
<label>Add a field</label>
<div class="tooltip-wrapper" style="display:inline-block;">
<button class="palette-btn" data-type="string" onclick="addField('string')" title="Free-form text or enum">
string
</button>
<span class="tooltip-text">Free-form text or constrained to specific values (enum). Great for classifications and open-ended text.</span>
</div>
<div class="tooltip-wrapper" style="display:inline-block;">
<button class="palette-btn" data-type="number" onclick="addField('number')" title="Decimal number">
number
</button>
<span class="tooltip-text">Floating-point decimal numbers (e.g., 3.14, 0.5). Use for measurements, percentages, and continuous values.</span>
</div>
<div class="tooltip-wrapper" style="display:inline-block;">
<button class="palette-btn" data-type="integer" onclick="addField('integer')" title="Whole number">
integer
</button>
<span class="tooltip-text">Whole numbers only (e.g., 42, -5, 0). Use for counts, indices, and discrete quantities.</span>
</div>
<div class="tooltip-wrapper" style="display:inline-block;">
<button class="palette-btn" data-type="boolean" onclick="addField('boolean')" title="true / false">
boolean
</button>
<span class="tooltip-text">True or false only. Use for yes/no decisions, presence/absence, or binary classifications.</span>
</div>
<div class="tooltip-wrapper" style="display:inline-block;">
<button class="palette-btn" data-type="array" onclick="addField('array')" title="List of items">
array
</button>
<span class="tooltip-text">Ordered list of items (strings, numbers, objects, etc.). Use for multiple related values like tags or nested records.</span>
</div>
<div class="tooltip-wrapper" style="display:inline-block;">
<button class="palette-btn" data-type="object" onclick="addField('object')" title="Nested object with sub-fields">
object
</button>
<span class="tooltip-text">Nested structure with its own fields/properties. Use for complex data with multiple related attributes.</span>
</div>
</div>
<!-- Fields render here -->
<div class="field-list" id="root-field-list"></div>
<!-- Empty state -->
<div id="empty-schema-msg" class="empty-schema">
<span class="empty-icon">🧱</span>
<strong>Your schema is empty</strong>
<p>Pick a type above to add your first field. You can combine <span class="type-badge" data-type="string">string</span>, <span class="type-badge" data-type="number">number</span>, <span class="type-badge" data-type="integer">integer</span>, <span class="type-badge" data-type="boolean">boolean</span>, <span class="type-badge" data-type="array">array</span>, and <span class="type-badge" data-type="object">object</span> to build any schema you need.</p>
</div>
<div class="step-footer">
<button class="btn btn-secondary" onclick="goStep(1)">← Back</button>
<button class="btn btn-primary" onclick="goStep(3)">Next: API Config →</button>
</div>
</div>
<!-- STEP 3 — API Config -->
<div class="step-panel" id="step-3">
<div class="card">
<div class="card-title">System prompt</div>
<div class="form-row">
<label for="sys-prompt">Defines the model's role and general instructions</label>
<textarea id="sys-prompt" rows="4" placeholder="e.g. You are an expert in monetary policy analysis. Classify central bank statements accurately." oninput="refreshPreview()"></textarea>
</div>
</div>
<div class="card">
<div class="card-title">User prompt template</div>
<div class="form-row">
<label>Use <code>{text}</code> as the placeholder for each input document</label>
<textarea id="user-prompt" rows="3" placeholder="Classify the monetary policy stance of the following statement: {text}" oninput="refreshPreview()"></textarea>
</div>
</div>
<div class="card">
<div class="card-title">Generation parameters</div>
<!-- Temperature -->
<div class="form-row">
<label class="label-with-tooltip" style="display: inline-flex; width: fit-content; margin-bottom: 0.5rem;">
Temperature
<span class="tooltip-text" style="font-weight: normal; white-space: normal;">
Controls the randomness and creativity of the AI's responses.<br><br>• <strong>Lower values (0.0–0.3):</strong> Produces highly predictable, focused, and deterministic outputs. Recommended for tasks requiring consistency, such as code generation, data formatting, or classification.<br><br>• <strong>Higher values (0.7–1.0):</strong> Generates more diverse and creative outputs. Ideal for brainstorming, storytelling, or generating varied ideas.
</span>
</label>
<div class="temp-row">
<input type="range" min="0" max="1" step="0.05" value="0" id="temperature"
oninput="document.getElementById('temp-display').textContent=this.value; refreshPreview()" />
<div class="temp-val" id="temp-display">0</div>
</div>
</div>
<!-- Seed -->
<div class="form-row" style="margin-top: 1.2rem;">
<label class="label-with-tooltip" style="display: inline-flex; width: fit-content; margin-bottom: 0.5rem;">
Seed
<span class="tooltip-text" style="font-weight: normal; white-space: normal;">
Sets the random seed for reproducible results. When enabled with Temperature = 0, you'll get more consistent outputs.<br><br>Note: Not all models support this parameter.
</span>
</label>
<div style="display: flex; align-items: center; gap: 0.75rem;">
<label class="toggle" id="seed-toggle-wrapper">
<input type="checkbox" id="use-seed" onchange="toggleSeedRow(); refreshPreview()" />
<div class="toggle-track"></div><div class="toggle-thumb"></div>
</label>
<div id="seed-row" style="display:none;">
<input type="number" id="seed-val" value="42" min="0" style="width:130px;" oninput="refreshPreview()" />
</div>
<span id="seed-unsupported-msg" style="display:none; color: var(--red); font-size: 0.85rem; font-style: italic;">Not supported by this model</span>
</div>
</div>
<!-- Max Tokens -->
<div class="form-row" style="margin-top: 1.2rem;">
<label class="label-with-tooltip" style="display: inline-flex; width: fit-content; margin-bottom: 0.5rem;">
Max Tokens
<span class="tooltip-text" style="font-weight: normal; white-space: normal;">
Sets the maximum number of tokens the model can generate in its response. Higher values allow longer outputs but consume more tokens.<br><br>When disabled, the provider's default limit is used.
</span>
</label>
<div style="display: flex; align-items: center; gap: 0.75rem;">
<label class="toggle" id="max-tokens-toggle-wrapper">
<input type="checkbox" id="use-max-tokens" onchange="toggleMaxTokensRow(); refreshPreview()" />
<div class="toggle-track"></div><div class="toggle-thumb"></div>
</label>
<div id="max-tokens-row" style="display:none;">
<input type="number" id="max-tokens-val" value="4096" min="1" style="width:130px;" oninput="refreshPreview()" />
</div>
</div>
</div>
</div>
<div class="step-footer">
<button class="btn btn-secondary" onclick="goStep(2)">← Back</button>
<button id="download-btn-1" class="btn btn-success" onclick="doDownload()">⬇ Download .py file</button>
</div>
</div>
</div><!-- /left-panel -->
<!-- RESIZE DIVIDER -->
<div class="resize-divider" id="resize-divider"></div>
<!-- RIGHT PANEL -->
<div class="right-panel">
<div class="preview-header">
<span class="preview-title">Live Preview</span>
<div class="preview-tabs">
<button class="preview-tab active" id="tab-code" onclick="switchTab('code')">Python</button>
<button class="preview-tab" id="tab-schema" onclick="switchTab('schema')">JSON Schema</button>
</div>
<div style="display: flex; gap: .5rem;">
<button class="preview-action-btn" id="copy-btn" onclick="doCopy()" title="Copy to clipboard">
<svg viewBox="0 0 24 24" width="16" height="16" stroke="currentColor" stroke-width="2" fill="none" stroke-linecap="round" stroke-linejoin="round"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path></svg>
</button>
<button class="preview-action-btn" id="download-btn-2" onclick="doDownload()" title="Download file">
<svg viewBox="0 0 24 24" width="16" height="16" stroke="currentColor" stroke-width="2" fill="none" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path><polyline points="7 10 12 15 17 10"></polyline><line x1="12" y1="15" x2="12" y2="3"></line></svg>
</button>
<button class="preview-action-btn" id="validate-btn" onclick="doValidate()" title="Validate schema for strict mode" style="display:none;">
<svg viewBox="0 0 24 24" width="16" height="16" stroke="currentColor" stroke-width="2" fill="none" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"></polyline></svg>
</button>
</div>
</div>
<div id="preview-placeholder" class="preview-placeholder">
<svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="#6060a0" stroke-width="1.5">
<rect x="3" y="3" width="18" height="18" rx="2"/><path d="M3 9h18M9 21V9"/>
</svg>
<p>Add fields in Step 2 and the generated code will appear here in real time.</p>
</div>
<pre id="code-output" style="display:none;"></pre>
<pre id="schema-output" style="display:none;"></pre>
</div>
</div><!-- /app-shell -->
<script>
// ─── STATE ────────────────────────────────────────────────────────────────────
const STATE = {
provider: 'openai',
model: 'gpt-4o',
schemaName: '',
// fields: flat array of field objects at schema root level
// Each field may have subFields[] when type === 'object' or (type === 'array' && arrayItemType === 'object')
fields: [],
sysPrompt: '',
userPrompt: '',
temperature: 0,
useSeed: false,
seedVal: 42,
useMaxTokens: false,
maxTokensVal: 4096,
activeTab: 'code',
nextFieldId: 1,
// drag state
_dragFieldId: null,
_dragParentId: null, // null = root level, otherwise parent field id
_dragZone: null, // 'before' | 'after' | 'into' — current hover zone
_dragTargetId: null, // field id currently being hovered over
};
// ─── RESIZE DIVIDER ───────────────────────────────────────────────────────────
const RESIZE_STATE = {
isResizing: false,
startX: 0,
startLeftWidth: 0,
};
const MIN_LEFT_WIDTH = 300; // Minimum width for left panel (px)
const MAX_LEFT_WIDTH = 0.8; // Maximum left panel as fraction of window (80%)
function initResizeDivider() {
const divider = document.getElementById('resize-divider');
if (!divider) return;
// Load saved width from localStorage
const savedLeftWidth = localStorage.getItem('schemaforge-left-width');
if (savedLeftWidth) {
applyLeftPanelWidth(savedLeftWidth);
}
divider.addEventListener('mousedown', onResizeMouseDown);
}
function onResizeMouseDown(e) {
e.preventDefault();
RESIZE_STATE.isResizing = true;
RESIZE_STATE.startX = e.clientX;
const appShell = document.querySelector('.app-shell');
const computedStyle = getComputedStyle(appShell);
const gridTemplateColumns = computedStyle.gridTemplateColumns;
// Parse the first column width (left panel)
const leftWidthStr = gridTemplateColumns.split(' ')[0];
RESIZE_STATE.startLeftWidth = parseFloat(leftWidthStr);
document.getElementById('resize-divider').classList.add('active');
document.addEventListener('mousemove', onResizeMouseMove);
document.addEventListener('mouseup', onResizeMouseUp);
document.body.style.userSelect = 'none';
document.body.style.cursor = 'col-resize';
}
function onResizeMouseMove(e) {
if (!RESIZE_STATE.isResizing) return;
const delta = e.clientX - RESIZE_STATE.startX;
const newLeftWidth = RESIZE_STATE.startLeftWidth + delta;
const maxLeftWidth = window.innerWidth * MAX_LEFT_WIDTH;
const constrainedWidth = Math.max(MIN_LEFT_WIDTH, Math.min(newLeftWidth, maxLeftWidth));
applyLeftPanelWidth(constrainedWidth);
}
function onResizeMouseUp(e) {
RESIZE_STATE.isResizing = false;
document.getElementById('resize-divider').classList.remove('active');
document.removeEventListener('mousemove', onResizeMouseMove);
document.removeEventListener('mouseup', onResizeMouseUp);
document.body.style.userSelect = '';
document.body.style.cursor = '';
// Save the width to localStorage
const appShell = document.querySelector('.app-shell');
const computedStyle = getComputedStyle(appShell);
const gridTemplateColumns = computedStyle.gridTemplateColumns;
const leftWidthStr = gridTemplateColumns.split(' ')[0];
localStorage.setItem('schemaforge-left-width', leftWidthStr);
}
function applyLeftPanelWidth(width) {
const root = document.documentElement;
if (typeof width === 'number') {
root.style.setProperty('--left-width', width + 'px');
root.style.setProperty('--right-width', 'auto');
} else {
root.style.setProperty('--left-width', width);
root.style.setProperty('--right-width', 'auto');
}
}
// ─── MODEL CATALOGUE ─────────────────────────────────────────────────────────
const MODELS = {
openai: [
{ id: 'gpt-4o', label: 'gpt-4o', strict: true, supportsSeed: true, defaultMaxTokens: 4096, note: '' },
{ id: 'gpt-4o-mini', label: 'gpt-4o-mini', strict: true, supportsSeed: true, defaultMaxTokens: 4096, note: '' },
{ id: 'gpt-4o-2024-08-06', label: 'gpt-4o-2024-08-06', strict: true, supportsSeed: true, defaultMaxTokens: 4096, note: '' },
{ id: 'gpt-4-turbo', label: 'gpt-4-turbo', strict: false, supportsSeed: true, defaultMaxTokens: 4096, note: 'Best-effort JSON mode — schema not enforced server-side.' },
],
groq: [
{ id: 'openai/gpt-oss-120b', label: 'GPT-OSS 120B', strict: true, supportsSeed: true, defaultMaxTokens: 4096, note: 'Supports strict and best-effort Structured Outputs.' },
{ id: 'openai/gpt-oss-20b', label: 'GPT-OSS 20B', strict: true, supportsSeed: true, defaultMaxTokens: 4096, note: 'Supports strict and best-effort Structured Outputs.' },
{ id: 'moonshotai/kimi-k2-instruct-0905', label: 'Kimi K2 Instruct', strict: false, supportsSeed: true, defaultMaxTokens: 4096, note: 'Best-effort Structured Outputs — schema not enforced server-side.' },
{ id: 'meta-llama/llama-4-scout-17b-16e-instruct', label: 'Llama 4 Scout 17B', strict: false, supportsSeed: true, defaultMaxTokens: 4096, note: 'Best-effort Structured Outputs — schema not enforced server-side.' },
{ id: 'openai/gpt-oss-safeguard-20b', label: 'GPT-OSS Safeguard 20B', strict: false, supportsSeed: true, defaultMaxTokens: 4096, note: 'Best-effort Structured Outputs — schema not enforced server-side.' },