panicgraph 0.2.1

Reports which functions can panic, why, and through what call path.
Documentation 
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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>panicgraph</title>
<style>
/* Palette roles live on :root so everything inherits them, including the page
   background and the tooltip, which d3 attaches outside the app element.
   Dark is a selected set stepped for the dark surface, not an inverted light
   palette. The chart's own colours, the three series, the gate and the
   frames, are not here: the app reads them from palette.json, the file the
   standalone drawing embeds, and writes the series and gate variables at
   start and on every theme change. */
:root {
  color-scheme: light;
  --surface-page:  #f4f3f0;
  --surface-panel: #ffffff;
  --surface-chart: #ffffff;
  --surface-sunk:  #eceae5;
  --border:        #dedbd4;
  --border-strong: #c9c6bd;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #78766f;
  --neutral-mark-strong: #aeaba3;
  --focus: #2a78d6;
  --shadow: 0 1px 2px rgba(11,11,11,.06), 0 8px 24px rgba(11,11,11,.10);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { color-scheme: dark;
    --surface-page:  #0e0e0d;
    --surface-panel: #191918;
    --surface-chart: #1a1a19;
    --surface-sunk:  #242423;
    --border:        #31312d;
    --border-strong: #47463f;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #8d8b81;
    --neutral-mark-strong: #57564f;
    --focus: #3987e5;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.45);
  }
}
:root[data-theme="dark"] { color-scheme: dark;
  --surface-page:  #0e0e0d;
  --surface-panel: #191918;
  --surface-chart: #1a1a19;
  --surface-sunk:  #242423;
  --border:        #31312d;
  --border-strong: #47463f;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted:     #8d8b81;
  --neutral-mark-strong: #57564f;
  --focus: #3987e5;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.45);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font: 13px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--surface-page);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.viz-root { display: flex; flex-direction: column; height: 100vh;
  background: var(--surface-page); }

header {
  display: flex; align-items: center; gap: 14px; flex: none;
  padding: 0 16px; height: 46px;
  border-bottom: 1px solid var(--border); background: var(--surface-panel);
}
header h1 { margin: 0; display: flex; align-items: center; flex: none; }
header h1 img { height: 26px; width: auto; display: block; }
.meta { color: var(--text-muted); font-size: 12px; display: flex; gap: 9px;
  flex-wrap: wrap; align-items: center; min-width: 0; }
.meta b { color: var(--text-secondary); font-weight: 500; }
.meta .sep { color: var(--border-strong); }
.spacer { flex: 1; }

button.ghost {
  background: var(--surface-panel); border: 1px solid var(--border);
  color: var(--text-secondary); border-radius: 7px; padding: 5px 11px;
  font: inherit; font-size: 12px; cursor: pointer;
  transition: background .12s, color .12s, border-color .12s;
}
button.ghost:hover { color: var(--text-primary);
  border-color: var(--border-strong); background: var(--surface-sunk); }
button.ghost[aria-pressed="true"] { color: var(--text-primary);
  background: var(--surface-sunk); border-color: var(--border-strong); }

.policy-caption { flex: none; padding: 9px 16px; font-size: 12px;
  border-bottom: 1px solid var(--border); background: var(--surface-page);
  color: var(--text-secondary); display: flex; align-items: center;
  gap: 8px; flex-wrap: wrap; }
.policy-caption strong { color: var(--text-primary); font-weight: 600; }
.policy-caption.locked { background: var(--surface-sunk);
  border-bottom-color: var(--border-strong); }
.lock-badge { font-size: 9.5px; font-weight: 700; letter-spacing: .09em;
  text-transform: uppercase; color: var(--surface-panel);
  background: var(--text-secondary); border-radius: 4px; padding: 2px 6px;
  flex: none; }
button.ghost.small { padding: 2px 9px; font-size: 11.5px; }
.kbd-hint { font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 10px; color: var(--text-muted); border: 1px solid var(--border);
  border-radius: 4px; padding: 1px 5px; }

main { display: flex; flex: 1; min-height: 0; background: var(--surface-page); }
aside { width: 328px; flex: none; overflow-y: auto; padding: 16px;
  border-right: 1px solid var(--border); background: var(--surface-panel); }
section.stage { flex: 1; display: flex; flex-direction: column;
  min-width: 0; background: var(--surface-page); }

h2 { font-size: 10.5px; text-transform: uppercase; letter-spacing: .09em;
  color: var(--text-muted); margin: 20px 0 9px; font-weight: 650; }
h2:first-child { margin-top: 0; }
.hint { font-size: 11.5px; color: var(--text-muted); margin: 0 0 10px; }

.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.tile { background: var(--surface-sunk); border: 1px solid var(--border);
  border-radius: 9px; padding: 11px 12px; }
.tile .n { font-size: 24px; font-weight: 620; line-height: 1.1;
  font-variant-numeric: tabular-nums; display: flex; align-items: baseline;
  gap: 7px; color: var(--text-primary); }
/* Neutral ink: the family hues already carry Allocation and Unverified in
   the legend, and a number is not one of those things. */
.tile .delta { font-size: 12px; font-weight: 600; color: var(--text-muted); }
.tile .of { font-size: 13px; font-weight: 500; color: var(--text-muted); }
.tile .k { font-size: 11px; color: var(--text-secondary); margin-top: 3px; }
.tile.wide { grid-column: 1 / -1; }

.cat { display: block; border-radius: 7px; cursor: pointer; padding: 2px 0; }
.cat:hover { background: var(--surface-sunk); }
.cat-row { display: flex; align-items: center; gap: 9px; padding: 3px 6px; }
.cat input { margin: 0; accent-color: var(--series-logic); cursor: pointer; }
.cat .name { flex: 1; font-size: 12px; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cat.off .name { color: var(--text-muted); text-decoration: line-through; }
.cat.muted { opacity: .45; }
.cat.solo { background: var(--surface-sunk);
  box-shadow: inset 2px 0 0 var(--series-logic); }
.cat.solo .name { color: var(--text-primary); font-weight: 600; }

/* The lock control stays out of the way until the row is under the pointer,
   so the panel still reads as a list of assumptions rather than a toolbar. */
/* Transparent rather than hidden: visibility:hidden takes the control out of
   the tab order, which made the lock reachable by mouse only. */
.only { border: 1px solid transparent; background: none; border-radius: 5px;
  font: inherit; font-size: 10px; letter-spacing: .06em; padding: 1px 6px;
  text-transform: uppercase; color: var(--text-muted); cursor: pointer;
  opacity: 0; flex: none; transition: opacity .12s; }
.cat:hover .only, .cat.solo .only, .only:focus-visible { opacity: 1; }
.only:hover { color: var(--text-primary); border-color: var(--border-strong);
  background: var(--surface-page); }
.cat.solo .only { color: var(--text-primary);
  border-color: var(--border-strong); background: var(--surface-page); }
.unread { font-size: 9px; letter-spacing: .06em; text-transform: uppercase;
  padding: 1px 5px; border-radius: 5px; flex: none; cursor: help;
  color: var(--text-muted); border: 1px dashed var(--border-strong); }
.cat input:disabled { opacity: .4; cursor: not-allowed; }
.cat .n { font-variant-numeric: tabular-nums; font-size: 11px;
  color: var(--text-secondary); min-width: 22px; text-align: right; }
.family-dot { width: 8px; height: 8px; border-radius: 2px; flex: none; }
.bar-track { display: block; margin: 1px 6px 4px 30px; height: 5px;
  background: var(--surface-page); border-radius: 999px; overflow: hidden;
  border: 1px solid var(--border); }
/* While a policy is being resolved the forecast on screen belongs to the
   previous one, so it recedes rather than flickering to a wrong number. */
.cat .n.stale, .bar-track.stale { opacity: .35; }
.bar { display: block; height: 100%; border-radius: 999px;
  background: var(--series-logic); transition: width .28s ease; }
.cat.off .bar { background: var(--neutral-mark-strong); }

.legend { flex: none; display: flex; flex-wrap: wrap; gap: 14px;
  align-items: center; padding: 9px 16px; font-size: 11.5px;
  color: var(--text-secondary); border-bottom: 1px solid var(--border);
  background: var(--surface-panel); }
.legend .item { display: flex; align-items: center; gap: 6px; }
.legend .swatch { width: 10px; height: 10px; border-radius: 2px; flex: none; }
.legend .gate-key { width: 10px; height: 10px; border-radius: 2px; flex: none;
  border: 1.5px dashed var(--gate); }
.legend .note { color: var(--text-muted); }
.legend .spacer { flex: 1; }

/* Search. The match indicator is a lightness and outline channel rather than
   a fill colour: a magenta highlight would sit too close to the family hues
   under deuteranopia, and recolouring a match would also hide which kind of
   panic it is. */
.search { display: flex; align-items: center; gap: 7px; }
.search input {
  /* A search input carries a user agent appearance that would otherwise win
     over the surface colour. */
  appearance: none; -webkit-appearance: none;
  font: inherit; font-size: 12px; width: 172px; padding: 4px 9px;
  color: var(--text-primary); background: var(--surface-page);
  border: 1px solid var(--border); border-radius: 7px;
  transition: border-color .12s, width .16s;
}
.search input::placeholder { color: var(--text-muted); }
.search input::-webkit-search-cancel-button { appearance: none; }
.search input:focus { outline: none; border-color: var(--focus); width: 232px; }
.search.active input { border-color: var(--border-strong); }
.search .tally { font-size: 11.5px; color: var(--text-muted);
  font-variant-numeric: tabular-nums; white-space: nowrap; }
.search .tally b { color: var(--text-primary); font-weight: 600; }
.search .only { opacity: 1; }

.disclose { display: block; width: 100%; margin-top: 10px; padding: 6px 8px;
  font: inherit; font-size: 11.5px; text-align: left; cursor: pointer;
  color: var(--text-muted); background: none; border: 1px dashed var(--border);
  border-radius: 7px; }
.disclose:hover { color: var(--text-primary); border-color: var(--border-strong);
  background: var(--surface-sunk); }
.cell rect.match { fill: none; stroke: var(--text-primary); stroke-width: 2; }
.cell rect.match.current { stroke: var(--series-alloc); stroke-width: 2.5; }

/* Ticks above the chart marking where the matches are, so a match a pixel
   wide can still be found. */
.match-tick { fill: var(--text-muted); }
.match-tick.current { fill: var(--series-alloc); }
.search .tally b { color: var(--text-primary); font-weight: 600; }

.crumbs { flex: none; display: flex; flex-wrap: wrap; align-items: center;
  gap: 2px; padding: 7px 16px; border-bottom: 1px solid var(--border);
  background: var(--surface-page); }
.crumb { background: none; border: none; padding: 3px 7px; border-radius: 6px;
  font: inherit; font-size: 11.5px; color: var(--text-secondary);
  cursor: pointer; max-width: 260px; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap; }
.crumb:hover:not(:disabled) { background: var(--surface-sunk);
  color: var(--text-primary); }
.crumb:disabled { color: var(--text-primary); cursor: default;
  font-weight: 600; }
.crumb + .crumb::before { content: "/"; color: var(--border-strong);
  margin-right: 7px; }
.crumb.rest { color: var(--text-secondary); cursor: default; }
.crumb-hint { font-size: 11px; color: var(--text-muted); margin-left: 4px; }

/* Progress. A policy change is answered by the server, so the wait is real
   and has to be visible rather than left to look like a dead interface. */
.progress { flex: none; height: 2px; background: transparent; overflow: hidden; }
.progress.on { background: var(--surface-sunk); }
.progress span { display: block; height: 100%; width: 0; }
.progress.on span {
  width: 34%; background: var(--series-logic); border-radius: 2px;
  animation: slide 1s ease-in-out infinite;
}
@keyframes slide {
  0% { margin-left: -34%; }
  100% { margin-left: 100%; }
}

.stage-body { position: relative; flex: 1; min-height: 0; display: flex; }
.veil {
  position: absolute; inset: 0; display: flex; align-items: center;
  justify-content: center; gap: 10px; font-size: 12px;
  color: var(--text-secondary); background: var(--surface-chart);
  opacity: .82;
}
.veil.quiet { flex-direction: column; text-align: center; opacity: 1;
  background: var(--surface-chart); padding: 0 24px; }
.veil.quiet .lead { color: var(--text-primary); font-size: 14px;
  font-weight: 600; margin: 0 0 6px; }
.veil.quiet p { margin: 0; max-width: 44ch; }
.linkish { background: none; border: none; padding: 0; font: inherit;
  color: var(--series-logic); cursor: pointer; text-decoration: underline; }

.spinner {
  width: 15px; height: 15px; border-radius: 50%;
  border: 2px solid var(--border-strong); border-top-color: var(--series-logic);
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .progress.on span, .veil.quiet { flex-direction: column; text-align: center; opacity: 1;
  background: var(--surface-chart); padding: 0 24px; }
.veil.quiet .lead { color: var(--text-primary); font-size: 14px;
  font-weight: 600; margin: 0 0 6px; }
.veil.quiet p { margin: 0; max-width: 44ch; }
.linkish { background: none; border: none; padding: 0; font: inherit;
  color: var(--series-logic); cursor: pointer; text-decoration: underline; }

.spinner { animation: none; }
  .progress.on span { width: 100%; }
}

.chart-host { flex: 1; min-height: 0; overflow: auto;
  padding: 12px 16px 20px; background: var(--surface-chart); }
.chart-host svg { display: block; }
.frame-label { font-size: 10px; pointer-events: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.cell rect { transition: opacity .12s; }
.cell:hover rect.frame { opacity: .8; }

.tooltip { position: fixed; pointer-events: none; z-index: 20;
  max-width: 400px; background: var(--surface-panel);
  border: 1px solid var(--border-strong); border-radius: 9px;
  padding: 9px 11px; font-size: 12px; box-shadow: var(--shadow);
  color: var(--text-secondary); }
.tooltip .t { color: var(--text-primary); font-weight: 600;
  margin-bottom: 4px; font-family: ui-monospace, SFMono-Regular, Menlo,
  monospace; font-size: 11.5px; word-break: break-all; }
.tooltip .gate { color: var(--gate); }
.tooltip .k { color: var(--text-muted); }

.detail { flex: none; max-height: 44%; overflow-y: auto; padding: 14px 16px;
  border-top: 1px solid var(--border); background: var(--surface-panel); }
.detail .empty { color: var(--text-muted); font-size: 12px; }
.detail h2 { color: var(--text-secondary); text-transform: none;
  letter-spacing: 0; font-size: 13px; font-weight: 600; }
.detail h2 code { color: var(--text-primary); }

.path { list-style: none; margin: 10px 0 0; padding: 0; }
.path li { padding: 4px 0 4px 15px; margin-left: 3px;
  border-left: 2px solid var(--border-strong); }
.path li.cleanup { border-left: 2px dashed var(--gate); }
.path li.terminal { border-left-color: var(--series-alloc); }
.path .fn { font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11.5px; color: var(--text-primary); word-break: break-all; }
.path .where { font-size: 11px; color: var(--text-muted); margin-top: 1px; }
.path .tag { font-size: 9.5px; text-transform: uppercase;
  letter-spacing: .07em; color: var(--gate); margin-left: 7px;
  font-weight: 650; }

table.data { border-collapse: collapse; width: 100%; font-size: 12px;
  margin-top: 8px; }
table.data th, table.data td { text-align: left; padding: 5px 9px;
  border-bottom: 1px solid var(--border); }
table.data th { color: var(--text-muted); font-weight: 650; font-size: 10.5px;
  text-transform: uppercase; letter-spacing: .07em; }
table.data tr:hover td { background: var(--surface-sunk); }
table.data td.n { text-align: right; font-variant-numeric: tabular-nums; }
table.data td.dim { color: var(--text-muted); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11.5px; }
.err { color: var(--series-alloc); font-size: 12px; margin-top: 12px;
  padding: 8px 10px; border-radius: 7px; background: var(--surface-sunk);
  border: 1px solid var(--border); }
</style>
</head>
<body data-palette="#3987e5,#d95926,#199e70">
  <div id="app" class="viz-root"></div>
  <script src="/vue.global.prod.js"></script>
  <script src="/d3.min.js"></script>
  <script src="/app.js"></script>
</body>
</html>