rhei-cli 0.2.0

Command-line driver for the Rhei agent runtime.
Documentation 
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Rhei · Flow</title>
<style>
  /* Calm console palette — see docs/functional-spec/rhei-viz-ux.spec.md §3 */
  :root {
    --bg:        #0e1116;
    --surface:   #14181f;
    --surface-2: #1b212b;
    --hairline:  #232a35;
    --ink:       #d6dae0;
    --dim:       #9aa3af;
    --faint:     #6b7480;
    --accent:    #7fb0d0;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
            "Liberation Mono", "Roboto Mono", monospace;
  }
  @media (prefers-color-scheme: light) {
    :root {
      --bg: #f4f1ea; --surface: #fbf9f4; --surface-2: #efece4; --hairline: #d8d3c7;
      --ink: #1c2128; --dim: #5a6470; --faint: #8a93a0; --accent: #2f6f97;
    }
  }
  * { box-sizing: border-box; }
  html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink);
    font: 13px/1.45 var(--mono); }
  a { color: var(--accent); }
  header { padding: 10px 16px; background: var(--surface-2);
    border-bottom: 1px solid var(--hairline);
    display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; }
  header h1 { margin: 0; font-size: 14px; font-weight: 600; letter-spacing: 0; }
  header .sub { color: var(--dim); font-size: 12px; }
  header #plan-title { color: var(--ink); font-weight: 600; }
  #live-dot { display: inline-flex; align-items: center; gap: 5px; color: var(--dim); }
  #live-dot::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #d4a84e; }
  #live-dot[hidden] { display: none; }
  #plan-picker[hidden] { display: none; }
  .controls { display: flex; gap: 10px; align-items: center; margin-left: auto; }
  select { background: var(--surface); color: var(--ink); border: 1px solid var(--hairline);
    border-radius: 4px; padding: 4px 8px; font: inherit; cursor: pointer; }
  .strip { display: flex; gap: 16px; align-items: center; flex-wrap: wrap;
    padding: 7px 16px; border-bottom: 1px solid var(--hairline); background: var(--surface);
    color: var(--dim); font-size: 12px; }
  .seg { display: inline-flex; border: 1px solid var(--hairline); border-radius: 4px; overflow: hidden; }
  .seg button { background: transparent; color: var(--dim); border: 0; border-right: 1px solid var(--hairline);
    padding: 4px 12px; font: inherit; cursor: pointer; }
  .seg button:last-child { border-right: 0; }
  .seg button.on { background: var(--surface-2); color: var(--ink); font-weight: 600;
    box-shadow: inset 0 -2px 0 var(--accent); }
  .summary b { color: var(--ink); font-weight: 600; }
  .legend { display: flex; gap: 12px; flex-wrap: wrap; margin-left: auto; }
  .legend span { white-space: nowrap; }
  .gly { display: inline-block; width: 1.1em; text-align: center; }
  main { padding: 14px 16px 24px; }
  .flow { display: flex; gap: 14px; align-items: stretch; }
  .pane-left, .pane-right { min-width: 0; }
  /* List mode: compact outline on the left, surroundings grows to the right edge. */
  .flow.list  .pane-left  { flex: 0 0 700px; }
  .flow.list  .pane-right { flex: 1 1 auto; }
  /* Graph mode: the DAG fills the left, surroundings stays a fixed column. */
  .flow.graph .pane-left  { flex: 1 1 auto; }
  .flow.graph .pane-right { flex: 0 0 560px; }
  @media (max-width: 1060px) {
    .flow { flex-direction: column; }
    .flow.list .pane-left, .flow.list .pane-right,
    .flow.graph .pane-left, .flow.graph .pane-right { flex: 0 0 auto; width: 100%; }
  }
  .panel { background: var(--surface); border: 1px solid var(--hairline); border-radius: 8px; }
  .panel > h2 { margin: 0; padding: 8px 12px; font-size: 11px; font-weight: 600;
    letter-spacing: 0; text-transform: uppercase; color: var(--dim);
    border-bottom: 1px solid var(--hairline); }

  /* ---- list (outline) ---- */
  .tree { padding: 6px 4px; max-width: 660px; }
  .row { display: flex; align-items: center; gap: 8px; max-width: 100%; min-width: 0;
    overflow: hidden; padding: 3px 10px;
    border-left: 3px solid transparent; border-radius: 0 4px 4px 0;
    cursor: pointer; white-space: nowrap; } /* §FS-rhei-viz.2 */
  .row:hover { background: var(--surface-2); }
  .row.sel { box-shadow: inset 0 0 0 1px var(--accent); }
  .row .lead { flex: 0 0 15px; display: inline-flex; align-items: center; justify-content: center; }
  .row .id { flex: 0 0 auto; max-width: 44%; min-width: 0; overflow: hidden;
    text-overflow: ellipsis; color: var(--dim); }
  .row .ttl { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
  .row .st { flex: 0 0 140px; }                                  /* pill column, left-aligned */
  .row .prog { flex: 0 0 46px; color: var(--faint); font-size: 11px; text-align: right; }
  .pill { display: inline-block; max-width: 100%; padding: 1px 8px; border-radius: 999px;
    font-size: 11px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

  /* Whole-line state coloring — meaning, glanceable (see note in commit/spec). */
  .row[data-cat="done"]    { background: color-mix(in srgb, #4f9e7e 16%, transparent); border-left-color: #4f9e7e; }
  .row[data-cat="blocked"] { background: color-mix(in srgb, #cf5b5b 18%, transparent); border-left-color: #cf5b5b; }
  .row[data-cat="failed"]  { background: color-mix(in srgb, #cf5b5b 14%, transparent); border-left-color: #cf5b5b; }
  .row[data-cat="active"]  { background: color-mix(in srgb, #6bb0cf 14%, transparent); border-left-color: #6bb0cf; }
  .row[data-cat="live"]    { background: color-mix(in srgb, #d4a84e 18%, transparent); border-left-color: #d4a84e; }
  .row[data-cat="gate"]    { background: color-mix(in srgb, #6cae7c 12%, transparent); border-left-color: #6cae7c; border-left-style: double; border-left-width: 4px; }
  .row[data-cat="retired"] { opacity: .55; }
  .row[data-cat="done"] .ttl,
  .row[data-cat="blocked"] .ttl,
  .row[data-cat="active"] .ttl,
  .row[data-cat="live"] .ttl    { color: var(--ink); }

  /* Spinner — the one live affordance; stilled under reduced motion. */
  .spinner { display: inline-block; width: 11px; height: 11px; box-sizing: border-box;
    border: 2px solid color-mix(in srgb, #d4a84e 35%, transparent);
    border-top-color: #d4a84e; border-radius: 50%; animation: spin .8s linear infinite; }
  @keyframes spin { to { transform: rotate(360deg); } }
  @media (prefers-reduced-motion: reduce) {
    .spinner { animation: none; border: 0; width: auto; height: auto; }
    .spinner::before { content: "●"; color: #d4a84e; }
  }

  /* ---- graph (DAG) ---- */
  svg { display: block; background: var(--surface); }
  .pane-left svg { width: 100%; }
  .gnode { cursor: pointer; }
  .gnode rect { fill: var(--surface-2); }
  .gnode.done rect    { fill: color-mix(in srgb, #4f9e7e 22%, var(--surface-2)); }
  .gnode.blocked rect { fill: color-mix(in srgb, #cf5b5b 22%, var(--surface-2)); }
  .gnode.failed rect  { fill: color-mix(in srgb, #cf5b5b 16%, var(--surface-2)); }
  .gnode.gate rect    { fill: color-mix(in srgb, #6cae7c 16%, var(--surface-2)); }
  .gnode.active rect  { fill: color-mix(in srgb, #6bb0cf 18%, var(--surface-2)); }
  .gnode.live rect    { fill: color-mix(in srgb, #d4a84e 20%, var(--surface-2));
    stroke-dasharray: 5 4; animation: ants 1s linear infinite; }
  @keyframes ants { to { stroke-dashoffset: -18; } }
  @media (prefers-reduced-motion: reduce) { .gnode.live rect { animation: none; stroke-dasharray: none; } }
  .gnode.sel rect { stroke: var(--accent); stroke-width: 2.5; }
  .gedge { fill: none; stroke: var(--hairline); stroke-width: 1.5; }
  text { font: 11px var(--mono); fill: var(--ink); }
  text.gid { fill: var(--dim); }
  text.gst { font-size: 10px; }

  /* ---- running now strip ---- */
  .running { display: none; margin-bottom: 14px; }
  .running.on { display: block; padding: 8px 12px; }
  .runhead { color: var(--dim); font-size: 11px; text-transform: uppercase; letter-spacing: 0; margin-bottom: 7px; }
  .runhead b { color: var(--ink); }
  .runrow { display: flex; gap: 8px; flex-wrap: wrap; }
  .runchip { display: inline-flex; align-items: center; gap: 8px; max-width: 100%; min-width: 0;
    overflow: hidden; padding: 4px 10px; border-radius: 6px;
    background: color-mix(in srgb, #d4a84e 14%, var(--surface));
    border: 1px solid color-mix(in srgb, #d4a84e 40%, var(--hairline)); cursor: pointer; }
  .runchip .id { min-width: 0; overflow: hidden; text-overflow: ellipsis; color: var(--ink); font-weight: 600; }
  .runchip .rst { min-width: 0; overflow: hidden; text-overflow: ellipsis; color: var(--dim); font-size: 11px; }

  /* ---- surroundings ---- */
  .surr { padding: 12px; transition: opacity .12s ease; }
  @media (prefers-reduced-motion: reduce) { .surr { transition: none; } }
  .surr .head { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
  .surr .head .id { font-weight: 600; }
  .surr .head .ttl { color: var(--dim); }
  .surr .flags { color: var(--faint); font-size: 11px; }
  /* Deep-link affordance: copy a URL that opens this node's surroundings. */
  .surr .head .copylink { margin-left: auto; color: var(--faint); font-size: 11px;
    cursor: pointer; border: 1px solid transparent; padding: 0 5px; border-radius: 3px;
    user-select: none; white-space: nowrap; }
  .surr .head .copylink:hover { color: var(--dim); border-color: var(--hairline); }
  .surr .desc { color: var(--dim); margin: 8px 0 4px; }
  .surr h3 { margin: 14px 0 5px; font-size: 11px; font-weight: 600; letter-spacing: 0;
    text-transform: uppercase; color: var(--dim); }
  .surr .vlabel { margin: 7px 0 3px; color: var(--faint); font-size: 11px; }
  .deps { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .deps h4 { margin: 0 0 4px; font-size: 11px; color: var(--faint); font-weight: 400; }
  .chips { display: flex; flex-wrap: wrap; gap: 5px; }
  .chip { display: inline-flex; align-items: center; gap: 5px; padding: 2px 8px; border-radius: 5px;
    background: var(--surface-2); border: 1px solid var(--hairline); font-size: 12px;
    cursor: pointer; color: var(--ink); }
  .chip.flat { cursor: default; }
  .chip .dot { width: 8px; height: 8px; border-radius: 2px; flex: 0 0 auto; }
  .chip .cond, .chip .wild { color: var(--faint); font-size: 11px; }
  .chip.done { color: var(--faint); }
  .none { color: var(--faint); }
  /* Keep long descendants and artifact paths inside the inspector pane. §FS-rhei-viz.4 */
  .child { display: flex; align-items: center; gap: 7px; max-width: 100%; min-width: 0;
    overflow: hidden; padding: 2px 0; cursor: pointer; white-space: nowrap; }
  .child:hover .ttl { color: var(--accent); }
  .child .gly { flex: 0 0 auto; }
  .child .id { flex: 0 1 auto; max-width: 58%; min-width: 0; overflow: hidden;
    text-overflow: ellipsis; color: var(--dim); }
  .child .ttl { flex: 1 1 auto; min-width: 8ch; overflow: hidden; text-overflow: ellipsis; }
  .child .st { flex: 0 0 auto; margin-left: auto; color: var(--dim); font-size: 11px; }
  .arts { margin: 0; padding: 0; list-style: none; }
  .arts li { max-width: 100%; margin: 4px 0; overflow-wrap: anywhere; }
  .arts .io { color: var(--faint); }
  .arts a { font-size: 11.5px; word-break: break-all; }
  .arts .unres { color: var(--faint); font-size: 11.5px; word-break: break-all; }
  .arts .adesc { color: var(--faint); font-size: 11px; }

  /* ---- human gate transition controls (live dashboard only) ---- */
  .gatebox { margin-top: 14px; padding: 10px 12px; border-radius: 6px;
    border: 1px solid color-mix(in srgb, #6cae7c 45%, var(--hairline));
    background: color-mix(in srgb, #6cae7c 8%, var(--surface)); }
  .gatebox h3 { margin: 0 0 4px; }
  .gatebox .gdesc { color: var(--dim); font-size: 12px; line-height: 1.5; margin-bottom: 8px; }
  .gatebox .grow { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
  .gatebox .gstatus { color: var(--faint); font-size: 11px; }
  .gatebox .gerr { color: #cf5b5b; }
  .gatebox .glabel { display: block; color: var(--dim); font-size: 11.5px; margin: 2px 0 4px; }
  .gatebox .gneed { color: #d4a84e; }
  .gatebox input.gresult { width: 100%; box-sizing: border-box; margin-bottom: 8px;
    font: inherit; font-size: 12px; padding: 5px 7px; border-radius: 4px;
    color: var(--fg); background: var(--surface);
    border: 1px solid color-mix(in srgb, #6cae7c 35%, var(--hairline)); }
  .gatebox input.gresult:disabled { opacity: 0.55; cursor: not-allowed; }

  /* ---- intervene (running tasks; static active-state preview) ---- */
  .intervene { margin-top: 14px; padding: 10px 12px; border-radius: 6px;
    border: 1px solid color-mix(in srgb, #d4a84e 45%, var(--hairline));
    background: color-mix(in srgb, #d4a84e 9%, var(--surface)); }
  .intervene h3 { margin: 0 0 4px; }
  .intervene .now { color: var(--dim); font-size: 12px; margin-bottom: 8px; display: flex; align-items: center; gap: 7px; }
  .intervene textarea { width: 100%; box-sizing: border-box; resize: vertical; min-height: 46px;
    background: var(--bg); color: var(--ink); border: 1px solid var(--hairline); border-radius: 5px;
    padding: 6px 8px; font: inherit; }
  .intervene .irow { display: flex; gap: 10px; align-items: center; margin-top: 7px; }
  .btn { background: var(--surface-2); color: var(--ink); border: 1px solid var(--hairline);
    border-radius: 5px; padding: 5px 14px; font: inherit; font-weight: 600; cursor: pointer; }
  .btn:hover { border-color: var(--accent); }
  .btn:disabled { opacity: 0.5; cursor: not-allowed; }
  .btn:disabled:hover { border-color: var(--hairline); }
  .intervene textarea:disabled { opacity: 0.55; cursor: not-allowed; }
  .intervene .hint { color: var(--faint); font-size: 11px; }
  /* Calm "can't be messaged" line for a live agent without an interactive stdin. */
  .intervene .noiv { color: var(--faint); font-size: 12px; margin-top: 8px; line-height: 1.5; }
  .intervene .noiv code { color: var(--dim); background: rgba(127,127,127,0.13);
    padding: 0 4px; border-radius: 3px; }
  /* Live agent output — a real terminal: dark in any theme, scrollback, ANSI color. */
  .term { margin: 8px 0; height: 340px; overflow-y: auto; background: #0b0e13; color: #cdd3de;
    border: 1px solid var(--hairline); border-radius: 6px; padding: 8px 10px;
    font-size: 12px; line-height: 1.5; }
  .term .tline { white-space: pre-wrap; word-break: break-word; }
  .term .me { color: #d4a84e; font-weight: 600; }
  .term .meln { color: #e7c885; }
  .term .err { color: #ff8f8f; font-weight: 600; }

  /* ---- machine graphs (one per disjoint state machine) ---- */
  .machines { margin-top: 14px; padding-bottom: 4px; }
  .mgraph { padding: 8px 12px; border-top: 1px solid var(--hairline); overflow-x: auto; }
  .mgraph:first-of-type { border-top: 0; }
  .mlabel { color: var(--dim); font-size: 11px; margin-bottom: 6px; }
  .mlabel b { color: var(--ink); }
  .mnode { cursor: pointer; }
  .mnode rect { fill: var(--surface-2); }
  .mnode .mcnt { font-weight: 600; }
  .mnode.empty { opacity: .5; }
  .mnode.empty rect { fill: var(--bg); }
  .mnode.cur rect { stroke: var(--accent) !important; stroke-width: 2.5 !important; }
  .medge { fill: none; stroke: var(--hairline); stroke-width: 1.4; }
  .medge.back { stroke-dasharray: 4 3; stroke: var(--faint); }
  .mk-fwd { fill: var(--hairline); }
  .mk-back { fill: var(--faint); }
  .mabout { padding: 8px 12px; color: var(--dim); font-size: 12px; line-height: 1.5;
    border-top: 1px solid var(--hairline); white-space: pre-wrap; }
  .mabout b { color: var(--ink); }
  .mdetail { padding: 9px 12px; border-top: 1px solid var(--hairline); background: var(--surface-2); }
  .mdetail .hint { color: var(--faint); font-size: 12px; }
  .mdhead { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; margin-bottom: 4px; }
  .mdlabel { color: var(--faint); font-size: 11px; text-transform: uppercase; letter-spacing: 0; margin: 7px 0 3px; }
  .mlegend { margin-top: 8px; display: grid; grid-template-columns: minmax(110px, max-content) 1fr;
    gap: 1px 12px; }
  .mlegrow { display: contents; cursor: pointer; }
  .mlegrow > .mlegname { display: inline-flex; align-items: center; gap: 6px; padding: 1px 2px; }
  .mlegrow > .mlegdesc { color: var(--dim); padding: 1px 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .mlegrow:hover > * { background: var(--surface-2); }
  .mlegrow.cur > .mlegname { color: var(--accent); font-weight: 600; }
  /* shared prompt block — machine-state template and instantiated task prompt */
  .prompt { white-space: pre-wrap; word-break: break-word; background: var(--bg);
    border: 1px solid var(--hairline); border-radius: 6px; padding: 8px 10px;
    font-size: 12px; line-height: 1.5; margin: 3px 0; max-height: 240px; overflow: auto; }
  .prompt .sub { color: var(--accent); font-weight: 600; }
  .prompt .unres { color: var(--faint); }
  .prompt a { color: var(--accent); }
  .machine-line { color: var(--dim); font-size: 12px; }
  .machine-line b { color: var(--accent); }

  /* ---- supplementary scanning views (§FS-rhei-viz §12) ---- */
  .supp { margin-top: 14px; }
  .stabs { display: flex; gap: 2px; flex-wrap: wrap; padding: 6px 10px; border-bottom: 1px solid var(--hairline); align-items: center; }
  .stabs .lbl { color: var(--faint); font-size: 11px; text-transform: uppercase; letter-spacing: 0; margin-right: 6px; }
  .stab { background: transparent; color: var(--dim); border: 0; border-radius: 5px; padding: 3px 10px; font: inherit; cursor: pointer; }
  .stab:hover { background: var(--surface-2); }
  .stab.on { background: var(--surface-2); color: var(--ink); font-weight: 600; box-shadow: inset 0 -2px 0 var(--accent); }
  .sbody { padding: 10px 12px; overflow-x: auto; }
  .stable { border-collapse: collapse; font-size: 12px; }
  .stable th { text-align: left; color: var(--faint); font-weight: 600; padding: 3px 10px; border-bottom: 1px solid var(--hairline); white-space: nowrap; }
  .stable td { padding: 3px 10px; border-bottom: 1px solid var(--hairline); white-space: nowrap; }
  .stable td.num, .stable th.num { text-align: right; font-variant-numeric: tabular-nums; }
  .stable tr:hover td { background: var(--surface-2); }
  .jrow { display: flex; gap: 8px; padding: 1px 0; white-space: pre-wrap; word-break: break-word; }
  .jrow .jt { color: var(--faint); flex: 0 0 auto; }
  .jglyph { width: 1.1em; display: inline-block; text-align: center; flex: 0 0 auto; }
  .jrow.warn .jglyph { color: #c79a4e; } .jrow.error .jglyph { color: #cf5b5b; } .jrow.info .jglyph { color: var(--faint); }
  .linkrow { display: flex; gap: 8px; align-items: baseline; padding: 2px 0; }
  .linkrow .src { color: var(--faint); font-size: 11px; }
  .acct-grid { display: grid; grid-template-columns: max-content max-content; gap: 2px 18px; font-size: 12px; }
  .acct-grid .k { color: var(--dim); } .acct-grid .v { text-align: right; font-variant-numeric: tabular-nums; }
  .heat { display: inline-block; min-width: 16px; height: 16px; border-radius: 3px; vertical-align: middle; }
  text.cell { font-size: 10px; }
</style>
</head>
<body>
<header>
  <h1>Rhei · Flow</h1>
  <span class="sub" id="plan-title"></span>
  <span class="sub" id="machine-line"></span>
  <div class="controls">
    <span class="sub" id="live-dot" hidden>live</span>
    <label class="sub" id="plan-picker" hidden>plan&nbsp;
      <select id="plan"></select>
    </label>
  </div>
</header>

<div class="strip">
  <span class="seg" id="mode">
    <button data-mode="list" class="on">List</button>
    <button data-mode="graph">Graph</button>
  </span>
  <span class="summary" id="summary"></span>
  <span class="legend" id="legend"></span>
</div>

<main>
  <div class="panel running" id="running"></div>
  <div class="flow list">
    <div class="pane-left panel" id="pane-left">
      <h2 id="left-title">Plan · outline</h2>
      <div id="left-body"></div>
    </div>
    <div class="pane-right panel">
      <h2>Surroundings</h2>
      <div class="surr" id="surr"></div>
    </div>
  </div>
  <div class="panel machines" id="machines"></div>
  <div class="panel supp" id="supp"></div>
</main>

<script>
// Boot payload. Static render: an object mapping plan key -> VizModel (the JS
// shows a selector when there is more than one). Live render: left as `null`,
// which tells the JS to poll `/snapshot` for the superset payload instead.
const BOOT = /*__BOOT__*/null;

// Canonical state order and the calm dark/light state colors (viz-ux §2,§3).
const STATE_ORDER = [
  "draft","pending","in_progress","in-progress","needs-review","review","prove",
  "consolidate","fix","agent-review","agent-review-fix","human-review","active",
  "completed","blocked","failed","cancelled","archived",
];
const STATE_COLOR = {
  "draft":"#5b6573","pending":"#7c8694","in-progress":"#5a8fc7","in_progress":"#5a8fc7",
  "active":"#6bb0cf","needs-review":"#c79a4e","human-review":"#6cae7c","review":"#9b7fc4",
  "prove":"#4fa3b3","consolidate":"#4fa394","fix":"#c98552","agent-review":"#8a78c4",
  "agent-review-fix":"#c47596","blocked":"#cf5b5b","failed":"#cf5b5b","completed":"#4f9e7e",
  "cancelled":"#424b57","archived":"#353c46",
};
function stateIndex(s){ const i = STATE_ORDER.indexOf(s); return i>=0?i:STATE_ORDER.length; }
function hashColor(s){ let h=0; for(const c of s) h=(h*31+c.charCodeAt(0))>>>0;
  return `hsl(${h%360} 22% 48%)`; }
function stateColor(s){ return STATE_COLOR[s] || hashColor(s); }
function pillInk(hex){
  if(!hex.startsWith("#")) return "#0e1116";
  const r=parseInt(hex.slice(1,3),16),g=parseInt(hex.slice(3,5),16),b=parseInt(hex.slice(5,7),16);
  return (0.299*r+0.587*g+0.114*b) > 150 ? "#0e1116" : "#eef1f5";
}

// ---- glyph + category per state (uses machine flags when known) -------------
const GLYPH = { done:"✓", active:"●", live:"●", blocked:"⊘", gate:"⏸",
  failed:"✗", retired:"⊝", idle:"·" };
function machineState(plan, name){
  const ss=(plan&&plan.machine&&plan.machine.states)||[];
  return ss.find(s=>s.name===name)||null;
}
function category(plan, state){
  const ms = machineState(plan, state);
  if (state==="completed") return "done";
  if (state==="failed") return "failed";
  if (state==="blocked") return "blocked";
  if (ms && ms.gating) return "gate";
  if (state==="human-review") return "gate";
  if (ms && ms.terminal) return state==="completed"?"done":"retired";
  if (state==="cancelled"||state==="archived") return "retired";
  if (state==="draft"||state==="pending"||(ms&&ms.initial)) return "idle";
  return "active";
}
function glyph(plan, state){ return GLYPH[category(plan,state)]; }
function runtimeFor(id){
  const tr=(IX&&IX.plan&&IX.plan.task_runtime)||{};
  return tr[id]||null;
}
function hasRuntimeOverlay(){
  const p=IX&&IX.plan;
  return !!(p && (p.slots || p.recent || p.task_runtime || p.accounting || p.finished || p.summary));
}
function isRunningNow(n){
  const rt=runtimeFor(n.id);
  return !!(rt && rt.in_slot!=null);
}
function showsLiveOutput(n){
  return hasRuntimeOverlay() ? isRunningNow(n) : nodeCategory(n)==="active";
}
function nodeCategory(n){
  const rt=runtimeFor(n.id);
  // The live dashboard overlays slot assignment on persisted plan state, so an
  // actively running pending task still exposes logs and intervention. §FS-rhei-viz.1.1
  return hasRuntimeOverlay() && rt && rt.in_slot!=null ? "live" : category(IX.plan,n.state);
}
function nodeGlyph(n){ return GLYPH[nodeCategory(n)]; }

// ---- index the plan into a navigable node graph -----------------------------
function idDepth(id){ return id.split(".").length - 1; }
function parentId(id){ const s=id.split("."); return s.length>1 ? s.slice(0,-1).join(".") : null; }
// The model is a flat TaskRow[] (id, title, parent, depth, state, prior, history) in
// source order — top-level tasks and their descendants. §FS-rhei-viz §8
function indexPlan(plan){
  const byId={}, nodes=[], order=[];
  const add=n=>{ n.children=[]; n.dependents=[]; byId[n.id]=n; nodes.push(n); order.push(n.id); };
  for(const t of (plan.tasks||[])){
    const depth = (typeof t.depth==="number") ? t.depth : idDepth(t.id);
    add({ id:t.id, title:t.title, state:t.state, prior:t.prior||[], history:t.history||[],
          visit_count:t.visit_count,
          kind: depth===0?"task":"sub", depth,
          parent: (t.parent!=null ? t.parent : parentId(t.id)) });
  }
  for(const n of nodes){
    if(n.parent && byId[n.parent]) byId[n.parent].children.push(n.id);
    for(const d of n.prior) if(byId[d]) byId[d].dependents.push(n.id);
  }
  const top = nodes.filter(n=>n.depth===0).map(n=>n.id);
  return { plan, byId, nodes, order, top };
}
function subtreeProgress(ix, id){
  let done=0,total=0;
  const walk=cid=>{ for(const c of ix.byId[cid].children){ total++; if(ix.byId[c].state==="completed") done++; walk(c); } };
  walk(id);
  return { done, total };
}

// ---- DOM helpers ------------------------------------------------------------
const SVG="http://www.w3.org/2000/svg";
function el(tag, attrs={}, kids=[]){ const n=document.createElement(tag);
  for(const[k,v]of Object.entries(attrs)){ if(k==="class")n.className=v; else if(k==="text")n.textContent=v; else n.setAttribute(k,v);}
  for(const c of kids) n.appendChild(c); return n; }
function svgEl(tag, attrs={}, kids=[]){ const n=document.createElementNS(SVG,tag);
  for(const[k,v]of Object.entries(attrs)) n.setAttribute(k,v); for(const c of kids)n.appendChild(c); return n; }
function trunc(s,n){ return s.length>n ? s.slice(0,n-1)+"…" : s; }

// ---- state ------------------------------------------------------------------
let IX=null, MODE="list", SEL=null, liveTermEl=null, MSTATE=null, machineDetailEl=null, LIVE=false;
let POLL_FAILS=0, LIVE_STALE=false;
// Live agent terminal: streams the selected running task's durable log via /log.
let LOGTERM=null, LOGTASK=null, LOGKEY=null, LOGOFF=0;
const rowEls={}, nodeEls={};
const INTERVENTIONS={};   // node id -> [{t, text}] queued in this demo session

// ---- left: outline ----------------------------------------------------------
function renderList(){
  const body=document.getElementById("left-body"); body.innerHTML="";
  document.getElementById("left-title").textContent="Plan · outline";
  const tree=el("div",{class:"tree"});
  for(const id of Object.keys(rowEls)) delete rowEls[id];
  for(const tid of IX.top){
    tree.appendChild(listRow(tid));
    for(const c of allDescendants(tid)) tree.appendChild(listRow(c));
  }
  body.appendChild(tree);
  applySelectionVisual();
}
function allDescendants(id){ const out=[]; const walk=x=>{ for(const c of IX.byId[x].children){ out.push(c); walk(c);} }; walk(id); return out; }
function listRow(id){
  const n=IX.byId[id], c=stateColor(n.state), cat=nodeCategory(n);
  const row=el("div",{class:"row", "data-cat":cat, "aria-label":`${id} · ${n.title}`});
  row.style.paddingLeft=(10 + n.depth*20)+"px";
  const lead=el("span",{class:"lead"});
  lead.appendChild(cat==="live" ? el("span",{class:"spinner"}) : el("span",{class:"gly", text:nodeGlyph(n)}));
  row.appendChild(lead);
  row.appendChild(el("span",{class:"id", text:id}));
  row.appendChild(el("span",{class:"ttl", text:n.title}));
  const st=el("span",{class:"st"}); const pl=el("span",{class:"pill",text:n.state});
  pl.style.background=c; pl.style.color=pillInk(c); st.appendChild(pl); row.appendChild(st);
  const prog=el("span",{class:"prog"});
  if(n.children.length){ const p=subtreeProgress(IX,id); prog.textContent=`${p.done}/${p.total} ✓`; }
  row.appendChild(prog);
  row.addEventListener("click",()=>select(id));
  rowEls[id]=row; return row;
}

// ---- left: graph (dependency DAG over top-level tasks) ----------------------
function renderGraph(){
  const body=document.getElementById("left-body"); body.innerHTML="";
  document.getElementById("left-title").textContent="Plan · dependency graph (Prior →)";
  for(const id of Object.keys(nodeEls)) delete nodeEls[id];
  const top=IX.top, topSet=new Set(top), memo={};
  const depth=id=>{ if(id in memo)return memo[id]; memo[id]=0;
    let d=0; for(const p of (IX.byId[id].prior||[])) if(topSet.has(p)) d=Math.max(d,depth(p)+1);
    return memo[id]=d; };
  const layers={}; let maxD=0;
  for(const id of top){ const d=depth(id); (layers[d]=layers[d]||[]).push(id); maxD=Math.max(maxD,d); }
  const BW=158,BH=44,HG=58,VG=14,PAD=16;
  const pos={}; let maxRows=0;
  for(let d=0; d<=maxD; d++){ const col=layers[d]||[]; maxRows=Math.max(maxRows,col.length);
    col.forEach((id,r)=>{ pos[id]={x:PAD+d*(BW+HG), y:PAD+r*(BH+VG)}; }); }
  const W=PAD*2+(maxD+1)*BW+maxD*HG, H=PAD*2+Math.max(1,maxRows)*(BH+VG)-VG;
  const svg=svgEl("svg",{viewBox:`0 0 ${W} ${H}`, style:`height:${H}px`});
  // edges
  for(const id of top) for(const p of (IX.byId[id].prior||[])){ if(!pos[p]||!pos[id])continue;
    const a=pos[p], b=pos[id], x1=a.x+BW, y1=a.y+BH/2, x2=b.x, y2=b.y+BH/2, mx=(x1+x2)/2;
    svg.appendChild(svgEl("path",{class:"gedge", d:`M ${x1} ${y1} C ${mx} ${y1}, ${mx} ${y2}, ${x2} ${y2}`})); }
  // nodes
  for(const id of top){ const n=IX.byId[id], p=pos[id], col=stateColor(n.state);
    const g=svgEl("g",{class:"gnode "+nodeCategory(n)}); g.style.cursor="pointer";
    g.appendChild(svgEl("rect",{x:p.x,y:p.y,width:BW,height:BH,rx:7,stroke:col,"stroke-width":2}));
    g.appendChild(svgEl("text",{x:p.x+10,y:p.y+17, class:"gid"}, [document.createTextNode(`${nodeGlyph(n)} ${id}`)]));
    g.appendChild(svgEl("text",{x:p.x+10,y:p.y+34, class:"gst", fill:col}, [document.createTextNode(trunc(n.state,16))]));
    g.appendChild(svgEl("title",{},[document.createTextNode(`${id} · ${n.title}`)]));
    g.addEventListener("click",()=>select(id));
    svg.appendChild(g); nodeEls[id]=g;
  }
  body.appendChild(svg);
  applySelectionVisual();
}

// ---- right: surroundings of the selected node -------------------------------
function depChip(id, satisfied){
  const n=IX.byId[id], c=stateColor(n.state);
  const chip=el("span",{class:"chip"+(satisfied?" done":""), "aria-label":`${id} · ${n.title}`});
  chip.appendChild(Object.assign(document.createElement("span"),{className:"dot",style:`background:${c}`}));
  chip.appendChild(document.createTextNode(`${id} ${n.state}`));
  chip.addEventListener("click",()=>select(id));
  return chip;
}
function renderSurroundings(){
  const box=document.getElementById("surr"); box.style.opacity="0";
  const n=IX.byId[SEL]; const ms=machineState(IX.plan,n.state); const c=stateColor(n.state);
  const frag=document.createDocumentFragment();

  const head=el("div",{class:"head"});
  head.appendChild(el("span",{class:"gly",text:nodeGlyph(n)}));
  head.appendChild(el("span",{class:"id",text:n.id}));
  head.appendChild(el("span",{class:"ttl",text:n.title}));
  const pl=el("span",{class:"pill",text:n.state}); pl.style.background=c; pl.style.color=pillInk(c);
  head.appendChild(pl);
  const flags=[]; if(ms){ if(ms.initial)flags.push("initial"); if(ms.terminal)flags.push("terminal"); if(ms.gating)flags.push("gating"); }
  flags.push(n.kind==="task"?"root task":"depth "+n.depth);
  head.appendChild(el("span",{class:"flags",text:flags.join(" · ")}));
  // Deep link: copy a URL whose hash opens this node (§FS-rhei-viz §1).
  const copy=el("span",{class:"copylink",title:"Copy a link that opens this node",text:"copy link"});
  copy.addEventListener("click",()=>copyNodeLink(n.id, copy));
  head.appendChild(copy);
  frag.appendChild(head);
  if(ms&&ms.description) frag.appendChild(el("div",{class:"desc",text:ms.description}));
  frag.appendChild(renderTokenSection(n));

  // dependencies
  const deps=el("div",{class:"deps"});
  const left=el("div",{}, [el("h4",{text:"depends on (Prior)"})]);
  const lc=el("div",{class:"chips"});
  if(n.prior.length){ for(const p of n.prior){ const pn=IX.byId[p];
      lc.appendChild(pn?depChip(p, isTerminal(pn.state)):flatChip(p+" (external)")); } }
  else lc.appendChild(el("span",{class:"none",text:"— ready (no prior)"}));
  left.appendChild(lc);
  const right=el("div",{}, [el("h4",{text:"unblocks"})]);
  const rc=el("div",{class:"chips"});
  if(n.dependents.length) for(const d of n.dependents) rc.appendChild(depChip(d, false));
  else rc.appendChild(el("span",{class:"none",text:"— nothing waiting"}));
  right.appendChild(rc);
  deps.appendChild(left); deps.appendChild(right);
  frag.appendChild(el("h3",{text:"dependencies"})); frag.appendChild(deps);
  if(n.prior.some(p=>IX.byId[p]&&!isTerminal(IX.byId[p].state)))
    frag.appendChild(el("div",{class:"none", text:"waiting on: "+n.prior.filter(p=>IX.byId[p]&&!isTerminal(IX.byId[p].state)).join(", ")}));

  // state history — task-specific durable history, capped to the last three
  frag.appendChild(el("h3",{text:"state history"}));
  const pc=el("div",{class:"chips"});
  const prev=previousStates(n);
  if(prev.length){
    for(const s of prev){
      const chip=el("span",{class:"chip flat"});
      chip.appendChild(dot(stateColor(s)));
      chip.appendChild(document.createTextNode(s));
      chip.addEventListener("click",()=>highlightState(s));
      pc.appendChild(chip);
    }
  } else {
    pc.appendChild(el("span",{class:"none",text:"— no state history recorded"}));
  }
  frag.appendChild(pc);

  // next state (outgoing transitions)
  frag.appendChild(el("h3",{text:"next state"}));
  const nc=el("div",{class:"chips"});
  if(ms&&ms.transitions.length){ for(const t of ms.transitions){
      const chip=el("span",{class:"chip"});
      chip.appendChild(dot(stateColor(t.to)));
      chip.appendChild(document.createTextNode("→ "+t.to));
      if(t.condition) chip.appendChild(el("span",{class:"cond",text:"["+t.condition+"]"}));
      if(t.wildcard) chip.appendChild(el("span",{class:"wild",text:"(from *)"}));
      chip.addEventListener("click",()=>highlightState(t.to));
      nc.appendChild(chip); } }
  else nc.appendChild(el("span",{class:"none",text: ms&&ms.terminal?"terminal — no exits":"—"}));
  frag.appendChild(nc);

  // Human gate — a live-only, explicit transition action for gating states.
  // It calls the same transition path as `rhei transition`; static/frozen pages
  // keep the choices visible but inert. §FS-rhei-viz.5.1
  if(ms&&ms.gating){
    frag.appendChild(renderGateTransition(n, ms));
  }

  // prompt — the state's instructions, instantiated for THIS task with linked artifacts
  if(ms&&ms.instructions){
    const variants=templateVariants(n,ms);
    frag.appendChild(el("h3",{text:`prompt · ${n.state}`}));
    variants.forEach((ctx,i)=>{
      if(variants.length>1) frag.appendChild(el("div",{class:"vlabel",text:templateContextLabel(ctx,i)}));
      frag.appendChild(instantiatePromptFrag(ms.instructions, n, ms, ctx));
    });
  }

  // intervene — an actually running task shows live output; static active-state
  // nodes keep a representative preview. The composer appears only when the
  // running agent can take a live message. §FS-rhei-viz §5.
  const hadLiveTerm=!!LOGTERM;
  liveTermEl=null; LOGTERM=null; LOGTASK=null;
  if(showsLiveOutput(n)){
    const rt=runtimeFor(n.id)||{};
    const runtime=hasRuntimeOverlay();
    // Capability gate: only a live agent whose slot holds a streaming stdin open
    // (profile `intervene_stdin`, surfaced as task_runtime[id].intervene) can be
    // messaged. The static page never delivers. §FS-rhei-viz §5, §7.2.
    const canMessage = LIVE && rt.intervene===true;
    const iv=el("div",{class:"intervene"});
    iv.appendChild(el("h3",{text: runtime ? (canMessage ? "live output · intervene" : "live output") : "sample output"}));
    const now=el("div",{class:"now"});
    now.appendChild(runtime ? el("span",{class:"spinner"}) : el("span",{class:"gly",text:GLYPH.active}));
    now.appendChild(document.createTextNode(runtime
      ? `running in ${n.state} — agent on ${n.id} · scroll up for history`
      : `representative transcript for ${n.state} · messages are disabled`));
    iv.appendChild(now);
    const term=el("div",{class:"term"});
    if(LIVE){
      // Live agent output streams in from /log; the terminal starts empty and
      // appends new lines in place on each poll. §FS-rhei-viz §5, AR §6.
      const key=n.id+"|"+n.state;
      if(key!==LOGKEY || !hadLiveTerm){ LOGKEY=key; LOGOFF=0; }
      term._resid=""; LOGTERM=term; LOGTASK=n.id;
    } else {
      for(const raw of sampleTranscript(n)) term.appendChild(termLine(raw));
    }
    for(const m of (INTERVENTIONS[n.id]||[])) term.appendChild(m.error?errLine(m.text):meLine(n.id,m));
    iv.appendChild(term); liveTermEl=term;
    if(LIVE && !canMessage){
      // Reachable to watch, but this agent can't take a live message — say so up
      // front, and say *how* to enable it, rather than dead-ending the operator
      // or inviting input that fails after they type. §FS-rhei-viz §5.
      const noiv=el("div",{class:"noiv"});
      noiv.appendChild(document.createTextNode(
        "This agent can't be messaged live — it doesn't keep an interactive stdin open. To enable intervention, set "));
      noiv.appendChild(el("code",{text:'"intervene_stdin": true'}));
      noiv.appendChild(document.createTextNode(" on this agent's profile (agents.<id> in .agents/rhei/settings.json) and rerun; only agents that keep reading stdin mid-run can receive messages."));
      iv.appendChild(noiv);
    } else {
      // Interactive on a reachable live agent; rendered disabled on the static
      // page, where messages are illustrative only. §FS-rhei-viz §7.2.
      const ta=el("textarea",{rows:"2", placeholder: canMessage
        ? `Message to the agent on ${n.id}…`
        : "Static preview — messages aren't delivered"});
      if(!canMessage) ta.disabled=true;
      iv.appendChild(ta);
      const irow=el("div",{class:"irow"});
      const btn=el("button",{class:"btn",text:"Send"});
      if(!canMessage) btn.disabled=true;
      irow.appendChild(btn);
      const hint = canMessage ? "⌘/Ctrl+Enter · sends to the agent's stdin"
                              : "static preview · messages are illustrative, not delivered";
      irow.appendChild(el("span",{class:"hint",text:hint}));
      iv.appendChild(irow);
      if(canMessage){
        const send=()=>{ const v=ta.value.trim(); if(!v) return;
          const m={t:new Date(), text:v};
          (INTERVENTIONS[n.id]=INTERVENTIONS[n.id]||[]).push(m);
          term.appendChild(meLine(n.id,m)); term.scrollTop=term.scrollHeight;
          sendIntervene(n, v).then(res=>{
            if(!res.ok){ const err={t:new Date(), text:res.error||"intervention was not delivered", error:true};
              (INTERVENTIONS[n.id]=INTERVENTIONS[n.id]||[]).push(err);
              term.appendChild(errLine(err.text)); term.scrollTop=term.scrollHeight; }
          });
          ta.value=""; ta.focus(); };
        btn.addEventListener("click",send);
        ta.addEventListener("keydown",e=>{ if((e.metaKey||e.ctrlKey)&&e.key==="Enter"){ e.preventDefault(); send(); } });
      }
    }
    frag.appendChild(iv);
  }

  // children
  if(n.children.length){
    const p=subtreeProgress(IX,n.id);
    frag.appendChild(el("h3",{text:`children · ${p.done}/${p.total} ✓`}));
    const list=el("div",{});
    for(const cid of allDescendants(n.id)){ const cn=IX.byId[cid], cc=stateColor(cn.state);
      const ch=el("div",{class:"child", "aria-label":`${cid} · ${cn.title}`});
      ch.style.paddingLeft=((idDepth(cid)-n.depth-1)*16)+"px";
      ch.appendChild(el("span",{class:"gly",text:nodeGlyph(cn)}));
      ch.appendChild(el("span",{class:"id",text:cid}));
      ch.appendChild(el("span",{class:"ttl",text:trunc(cn.title,30)}));
      ch.appendChild(el("span",{class:"st",text:cn.state}));
      ch.addEventListener("click",()=>select(cid));
      list.appendChild(ch); }
    frag.appendChild(list);
  }

  // artifacts (resolved for this node); a state with no contracts of its own
  // borrows the previous state's outputs, labeled. §FS-rhei-viz.4
  if(ms&&((ms.inputs&&ms.inputs.length)||(ms.outputs&&ms.outputs.length))){
    const variants=templateVariants(n,ms);
    frag.appendChild(el("h3",{text:"artifacts"}));
    variants.forEach((ctx,i)=>{
      if(variants.length>1) frag.appendChild(el("div",{class:"vlabel",text:templateContextLabel(ctx,i)}));
      frag.appendChild(artList(ms.inputs,"in ◂",n,ms,ctx));
      frag.appendChild(artList(ms.outputs,"out ▸",n,ms,ctx));
    });
  } else if(ms){
    const prev=(n.history||[]).map(h=>h.from&&h.from.trim()).filter(Boolean).pop();
    const pms=prev?machineState(IX.plan,prev):null;
    if(pms&&pms.outputs&&pms.outputs.length){
      const variants=templateVariants(n,pms);
      frag.appendChild(el("h3",{text:"artifacts"}));
      frag.appendChild(el("div",{class:"vlabel",text:"from "+prev}));
      variants.forEach((ctx,i)=>{
        if(variants.length>1) frag.appendChild(el("div",{class:"vlabel",text:templateContextLabel(ctx,i)}));
        frag.appendChild(artList(pms.outputs,"out ▸",n,pms,ctx));
      });
    }
  }

  box.innerHTML=""; box.appendChild(frag);
  requestAnimationFrame(()=>{ box.style.opacity="1"; if(liveTermEl) liveTermEl.scrollTop=liveTermEl.scrollHeight; });
}
function flatChip(t){ return el("span",{class:"chip flat",text:t}); }
function dot(c){ const d=document.createElement("span"); d.className="dot"; d.style.background=c; return d; }
function gateTransitionAvailable(){
  return LIVE && !!(IX && IX.plan && IX.plan.capabilities && IX.plan.capabilities.gate_transition);
}
function renderGateTransition(node, ms){
  const box=el("div",{class:"gatebox"});
  box.appendChild(el("h3",{text:"human gate"}));
  const choices=(ms.transitions||[]).filter(t=>!t.wildcard);
  const canAct=gateTransitionAvailable();
  const desc=canAct
    ? "Pick an explicit outgoing transition. Rhei validates the current state before writing."
    : LIVE
      ? "This live dashboard is not wired for gate transitions."
      : "Static preview — gate transitions are not delivered.";
  box.appendChild(el("div",{class:"gdesc",text:desc}));
  // The operator's own account of the decision, carried through the move like
  // `rhei transition --result`. Always offered; flagged as needed when a choice
  // finishes the ticket, because that is the case the server refuses without
  // one. §FS-rhei-viz.5.1 §FS-rhei-states.3.3
  const anyTerminal=choices.some(t=>isTerminal(t.to));
  const label=el("label",{class:"glabel"});
  label.appendChild(document.createTextNode("Result"));
  if(anyTerminal){
    label.appendChild(document.createTextNode(" "));
    // An existing non-empty result satisfies the obligation too, so this is a
    // "needed unless" and not a "required". §FS-rhei-states.3.3
    label.appendChild(el("span",{class:"gneed",text:"— needed to finish the ticket, unless it already has a result"}));
  }
  const resultInput=el("input",{class:"gresult", type:"text",
    placeholder: canAct ? "Why this ticket ended here…" : "Static preview — not delivered"});
  if(!canAct) resultInput.disabled=true;
  label.appendChild(resultInput);
  box.appendChild(label);
  const row=el("div",{class:"grow"});
  const status=el("span",{class:"gstatus"});
  if(!choices.length){
    row.appendChild(el("span",{class:"none",text:"No explicit exits from this gate."}));
  }
  for(const t of choices){
    const btn=el("button",{class:"btn",text:t.to,title:t.condition||""});
    btn.disabled=!canAct;
    btn.addEventListener("click",()=>{
      if(btn.disabled) return;
      const ok=window.confirm(`Transition Task ${node.id} from ${node.state} to ${t.to}?`);
      if(!ok) return;
      row.querySelectorAll("button").forEach(b=>b.disabled=true);
      status.className="gstatus";
      status.textContent="transitioning…";
      sendGateTransition(node,t.to,resultInput.value).then(res=>{
        if(res.ok){
          status.textContent=`transitioned to ${res.to||t.to}`;
          resultInput.value="";
          refreshSnapshotOnce();
        } else {
          status.className="gstatus gerr";
          status.textContent=res.error||"transition failed";
          row.querySelectorAll("button").forEach(b=>b.disabled=false);
        }
      });
    });
    row.appendChild(btn);
  }
  row.appendChild(status);
  box.appendChild(row);
  return box;
}
function previousStates(node){
  return (node.history||[])
    .map(h=>h&&h.from)
    .filter(Boolean)
    .reverse()
    .slice(0,3);
}
// ANSI 16-color palette (dark terminal) used to render the agent's own coloring.
const TERM_COLOR = {
  30:"#3b4252",31:"#cf5b5b",32:"#6cae7c",33:"#d4a84e",34:"#5a8fc7",35:"#9b7fc4",36:"#4fa3b3",37:"#cdd3de",
  90:"#6b7480",91:"#e07b7b",92:"#86c79a",93:"#e4c074",94:"#7aa6d6",95:"#b79bd6",96:"#6fbecd",97:"#eef1f5",
};
// Minimal SGR parser: maps the agent's \x1b[..m color/bold/dim runs into spans.
function ansiToFrag(line){
  const frag=document.createDocumentFragment();
  const re=/\u001b\[([0-9;]*)m/g;
  let last=0, m, cur={color:null,bold:false,dim:false};
  const push=text=>{ if(!text) return; const sp=document.createElement("span"); sp.textContent=text;
    if(cur.color) sp.style.color=cur.color; if(cur.bold) sp.style.fontWeight="600"; if(cur.dim) sp.style.opacity="0.6";
    frag.appendChild(sp); };
  while((m=re.exec(line))){ push(line.slice(last,m.index)); last=re.lastIndex;
    const codes = m[1]==="" ? [0] : m[1].split(";").map(Number);
    for(const c of codes){ if(c===0) cur={color:null,bold:false,dim:false};
      else if(c===1) cur.bold=true; else if(c===2) cur.dim=true; else if(c===22){cur.bold=false;cur.dim=false;}
      else if(c===39) cur.color=null; else if(TERM_COLOR[c]) cur.color=TERM_COLOR[c]; } }
  push(line.slice(last));
  return frag;
}
function termLine(raw){ const d=el("div",{class:"tline"}); d.appendChild(ansiToFrag(raw)); return d; }
function meLine(id,m){
  const d=el("div",{class:"tline"});
  const hh=String(m.t.getHours()).padStart(2,"0"), mm=String(m.t.getMinutes()).padStart(2,"0");
  const a=document.createElement("span"); a.className="me"; a.textContent=`▸ you ${hh}:${mm} `;
  const b=document.createElement("span"); b.className="meln"; b.textContent=m.text;
  d.appendChild(a); d.appendChild(b); return d;
}
function errLine(text){
  const d=el("div",{class:"tline"});
  const a=document.createElement("span"); a.className="err"; a.textContent="! not delivered ";
  const b=document.createElement("span"); b.textContent=text;
  d.appendChild(a); d.appendChild(b); return d;
}
// Synthetic agent transcript so the demo terminal has colored history to scroll.
function sampleTranscript(n){
  const id=n.id, st=n.state, ttl=n.title;
  const E="\u001b[", R=E+"0m";
  const dim=s=>E+"2m"+s+R, cy=s=>E+"36m"+s+R, gr=s=>E+"32m"+s+R, ye=s=>E+"33m"+s+R,
        rd=s=>E+"31m"+s+R, bl=s=>E+"34m"+s+R, mg=s=>E+"35m"+s+R, bo=s=>E+"1m"+s+R;
  const ts=(mm,ss)=>dim(`14:${mm}:${ss}`);
  const f="crates/rhei-tui/src/dashboard/html.rs";
  const head=[
    `${ts("01","58")} ${cy("▸ claude-code")} attached to task ${bo(id)} ${dim("·")} state ${ye(st)}`,
    `${ts("01","58")} ${dim("prompt")} ${ttl}`,
    `${ts("02","01")} ${cy("● read")} ${bl(f)} ${dim("(1,284 lines)")}`,
    `${ts("02","02")} ${cy("● grep")} ${dim("\"--accent\"")} ${dim("→")} 7 matches`,
    `${ts("02","04")} thinking about the calm-palette mapping…`,
  ];
  const byState={
    "in-progress":[
      `${ts("02","06")} ${cy("● edit")} ${bl(f)} ${gr("+38")} ${rd("-12")}`,
      `${ts("02","07")} rewrote token block to the desaturated ramp`,
      `${ts("02","09")} ${cy("● run")} ${dim("cargo build -p rhei-tui")}`,
      `${ts("02","21")} ${gr("✓")} build finished ${dim("12.4s")}`,
    ],
    "agent-review":[
      `${ts("02","06")} ${cy("● read")} diff ${dim("runtime/diffs/task-"+id+".patch")}`,
      `${ts("02","08")} reviewing against the description…`,
      `${ts("02","10")} ${ye("! ")}pill contrast on ${bo("needs-review")} measures ${ye("4.1:1")} ${dim("(< 4.5:1)")}`,
      `${ts("02","11")} ${gr("✓")} monochrome chrome confirmed`,
    ],
    "review":[
      `${ts("02","06")} ${mg("● review pass 1/2")} gathering evidence`,
      `${ts("02","08")} ${ye("! ")}found 2 spinners still present in slots view`,
      `${ts("02","09")} ${gr("✓")} recorded findings → ${dim("runtime/reviews/task-"+id+"-review-1.md")}`,
    ],
    "consolidate":[
      `${ts("02","06")} merging pass-1 and pass-2 findings`,
      `${ts("02","08")} ${gr("✓")} ranked 9 findings, 3 blocking`,
    ],
    "needs-review":[
      `${ts("02","06")} preparing review request`,
      `${ts("02","07")} ${gr("✓")} wrote ${dim("runtime/reviews/task-"+id+"-request.md")}`,
    ],
    "active":[
      `${ts("02","06")} ${cy("● probe")} polling /snapshot latency`,
      `${ts("02","36")} p50 ${gr("41ms")} ${dim("·")} p99 ${ye("180ms")}`,
    ],
  };
  const work=byState[st] || [ `${ts("02","06")} working in ${ye(st)}…`, `${ts("02","12")} ${gr("✓")} step complete` ];
  const tail=[
    `${ts("02","40")} ${cy("● read")} ${bl("docs/functional-spec/rhei-viz-ux.spec.md")}`,
    `${ts("02","41")} cross-checking against §3.2 color rules`,
    `${ts("02","45")} ${dim("…")} continuing, awaiting guidance`,
  ];
  // Pad so there is always enough to scroll.
  const filler=[];
  for(let i=0;i<6;i++) filler.push(`${ts("02",String(46+i).padStart(2,"0"))} ${dim("·")} heartbeat ${dim("agent alive, "+st)}`);
  return [...head, ...work, ...tail, ...filler];
}
function isTerminal(state){ const ms=machineState(IX.plan,state); return ms?ms.terminal:["completed","cancelled","archived","failed"].includes(state); }
function templateVariants(node, ms){
  // Static fanout states render each authored target/model context; live slots
  // use the concrete runtime invocation context. §FS-rhei-viz.8
  if(((runtimeFor(node.id)||{}).template_context)) return [null];
  const contexts=(ms&&ms.template_contexts)||[];
  return contexts.length ? contexts : [null];
}
function templateContextLabel(ctx, i){
  if(!ctx) return "variant "+(i+1);
  return ctx.target_slug || ctx.target || ctx.model_name || ctx.model || ctx.agent || ("variant "+(i+1));
}
function templateScalars(node, ms, overrideCtx){
  const stateCtx=(ms&&ms.template_context)||{}, runCtx=(runtimeFor(node.id)||{}).template_context||{};
  const ctx=Object.assign({}, stateCtx, overrideCtx||{}, runCtx);
  const visit = node.visit_count!=null ? String(node.visit_count) : "1";
  const vals={
    "task_id":node.id, "task_title":node.title, "state":ms?ms.name:node.state,
    "visit_count":visit, "visits": ms&&ms.visits?String(ms.visits):"N",
  };
  const map=[
    ["target","target"],["target.slug","target_slug"],["model","model"],
    ["model.provider","model_provider"],["model.name","model_name"],
    ["agent","agent"],["agent.mode","agent_mode"],
  ];
  for(const [tok,key] of map) if(ctx[key]!=null && ctx[key]!=="") vals[tok]=String(ctx[key]);
  return vals;
}
function fillPath(t,node,ms,ctx){
  const vals=templateScalars(node,ms,ctx); let unresolved=false;
  const path=t.replace(/\{([^}]+)\}/g,(_,raw)=>{ const tok=raw.trim();
    if(tok in vals) return vals[tok]; unresolved=true; return "{"+tok+"}"; });
  return {path, unresolved};
}
// Render a state's instructions with every {template var} resolved for this
// task: scalars inline (highlighted), and {input/output.<name>.path} as links.
function instantiatePromptFrag(text, node, ms, ctx){
  const pre=el("pre",{class:"prompt"});
  const scalars=templateScalars(node,ms,ctx);
  const artPath=(kind,name)=>{ const arr=(ms&&ms[kind])||[]; const a=arr.find(x=>x.name===name);
    if(!a) return null; const r=fillPath(a.path,node,ms,ctx); return r.unresolved?null:r.path; };
  const re=/\{([^}]+)\}/g; let last=0, m;
  while((m=re.exec(text))){
    if(m.index>last) pre.appendChild(document.createTextNode(text.slice(last,m.index)));
    last=re.lastIndex;
    const tok=m[1].trim();
    const im=/^input\.(.+)\.path$/.exec(tok), om=/^output\.(.+)\.path$/.exec(tok);
    const path = im ? artPath("inputs",im[1]) : om ? artPath("outputs",om[1]) : null;
    if(path){ pre.appendChild(openLink(path)); }
    else if(tok in scalars){ pre.appendChild(el("span",{class:"sub",text:scalars[tok]})); }
    else { pre.appendChild(el("span",{class:"unres",text:"{"+tok+"}"})); }
  }
  if(last<text.length) pre.appendChild(document.createTextNode(text.slice(last)));
  return pre;
}
function artList(arts,label,node,ms,ctx){
  const ul=el("ul",{class:"arts"});
  if(!arts||!arts.length){ ul.appendChild(el("li",{},[el("span",{class:"io",text:label+" "}),el("span",{class:"none",text:"—"})])); return ul; }
  for(const a of arts){ const li=el("li");
    li.appendChild(el("span",{class:"io",text:label+" "}));
    const r=fillPath(a.path,node,ms,ctx);
    if(r.unresolved) li.appendChild(el("span",{class:"unres",text:r.path}));
    else li.appendChild(openLink(r.path, r.path, a.description||""));
    if(a.optional) li.appendChild(el("span",{class:"adesc",text:" (optional)"}));
    if(a.description){ li.appendChild(document.createElement("br")); li.appendChild(el("span",{class:"adesc",text:a.description})); }
    ul.appendChild(li); }
  return ul;
}

// ---- machine rails (disjoint state machines render as separate rails) -------
function machineComponents(machine){
  const states=machine.states.map(s=>s.name), adj={};
  for(const s of states) adj[s]=new Set();
  for(const s of machine.states) for(const t of s.transitions){ if(t.wildcard)continue; if(!(t.to in adj))continue;
    adj[s.name].add(t.to); adj[t.to].add(s.name); }
  const seen=new Set(), comps=[];
  for(const s of states){ if(seen.has(s))continue; const q=[s]; seen.add(s); const comp=[];
    while(q.length){ const x=q.pop(); comp.push(x); for(const y of adj[x]) if(!seen.has(y)){seen.add(y);q.push(y);} }
    comps.push(comp); }
  return comps;
}
let MK=0;
function renderMachines(){
  const root=document.getElementById("machines"); root.innerHTML="";
  const machine=IX.plan.machine; if(!machine||!machine.states){ return; }
  const flagOf={}; for(const s of machine.states) flagOf[s.name]=s;
  const edgesAll=[];
  for(const s of machine.states) for(const t of s.transitions) if(!t.wildcard) edgesAll.push({from:s.name,to:t.to});
  const comps=machineComponents(machine);
  const multi=comps.filter(c=>c.length>1).sort((a,b)=>Math.min(...a.map(stateIndex))-Math.min(...b.map(stateIndex)));
  const termSingles=comps.filter(c=>c.length===1 && flagOf[c[0]] && flagOf[c[0]].terminal).map(c=>c[0]);
  const otherSingles=comps.filter(c=>c.length===1 && !(flagOf[c[0]] && flagOf[c[0]].terminal)).map(c=>c[0]);
  const heading = multi.length>1
    ? `State machines — ${machine.name} (${multi.length} disjoint)`
    : `State machine — ${machine.name}`;
  root.appendChild(el("h2",{text:heading}));
  if(IX.plan.about){
    const about=el("div",{class:"mabout"});
    about.appendChild(el("b",{text:"What this rhei is doing — "}));
    about.appendChild(document.createTextNode(IX.plan.about));
    root.appendChild(about);
  }
  machineDetailEl=el("div",{class:"mdetail"}); root.appendChild(machineDetailEl);
  renderMachineDetail(MSTATE);
  multi.forEach((comp,i)=>{
    const label = multi.length>1 ? `${machine.name} · part ${i+1}` : machine.name;
    drawMachineGraph(root, `<b>${label}</b> &middot; ${comp.length} states`, comp, edgesAll, flagOf);
  });
  if(otherSingles.length)
    drawMachineGraph(root, "isolated", otherSingles, edgesAll, flagOf);
  if(termSingles.length)
    drawMachineGraph(root, "terminal &middot; reachable from any state (wildcard)", termSingles, edgesAll, flagOf);
}

// Longest-path layering with cycle tolerance: back edges (to a node still on the
// DFS stack) are excluded from the layering and later drawn as dashed loops.
function layeredLayout(orderedStates, edges){
  const set=new Set(orderedStates), adj={};
  orderedStates.forEach(s=>adj[s]=[]);
  for(const e of edges) if(set.has(e.from)&&set.has(e.to)) adj[e.from].push(e.to);
  const color={}, back=new Set(), finish=[];
  const dfs=u=>{ color[u]=1;
    for(const v of adj[u]){ if(color[v]===1) back.add(u+"\u0000"+v); else if(!color[v]) dfs(v); }
    color[u]=2; finish.push(u); };
  for(const r of orderedStates) if(!color[r]) dfs(r);
  const layer={}; orderedStates.forEach(s=>layer[s]=0);
  for(const u of finish.slice().reverse())
    for(const v of adj[u]) if(!back.has(u+"\u0000"+v)) layer[v]=Math.max(layer[v],layer[u]+1);
  return { layer };
}
function mkMarker(id, cls){
  const m=svgEl("marker",{id, viewBox:"0 0 10 10", refX:9, refY:5, markerWidth:7, markerHeight:7, orient:"auto"});
  m.appendChild(svgEl("path",{class:cls, d:"M0 0 L10 5 L0 10 z"}));
  return m;
}
function drawMachineGraph(root, labelHtml, states, edgesAll, flagOf){
  const uid="mk"+(MK++);
  const box=el("div",{class:"mgraph"});
  const lab=el("div",{class:"mlabel"}); lab.innerHTML=labelHtml; box.appendChild(lab);
  const set=new Set(states);
  const edges=edgesAll.filter(e=>set.has(e.from)&&set.has(e.to));
  const ordered=[...states].sort((a,b)=>{
    const ia=(flagOf[a]&&flagOf[a].initial)?0:1, ib=(flagOf[b]&&flagOf[b].initial)?0:1;
    return ia-ib || stateIndex(a)-stateIndex(b);
  });
  const {layer}=layeredLayout(ordered, edges);
  const cols={}; let maxL=0, maxRows=0;
  ordered.forEach(s=>{ const l=layer[s]; (cols[l]=cols[l]||[]).push(s); maxL=Math.max(maxL,l); });
  for(const l in cols){ cols[l].sort((a,b)=>stateIndex(a)-stateIndex(b)); maxRows=Math.max(maxRows,cols[l].length); }
  const NW=126, NH=32, HG=52, VG=16, PAD=14, BACKDIP=30;
  const pos={};
  for(let l=0;l<=maxL;l++) (cols[l]||[]).forEach((s,r)=>{ pos[s]={x:PAD+l*(NW+HG), y:PAD+r*(NH+VG)}; });
  const W=PAD*2+(maxL+1)*NW+maxL*HG;
  const H=PAD*2+Math.max(1,maxRows)*(NH+VG)-VG+BACKDIP;
  const svg=svgEl("svg",{viewBox:`0 0 ${W} ${H}`, style:`height:${H}px; min-width:${W}px`});
  const defs=svgEl("defs");
  defs.appendChild(mkMarker("fwd-"+uid,"mk-fwd"));
  defs.appendChild(mkMarker("back-"+uid,"mk-back"));
  svg.appendChild(defs);
  for(const e of edges){ const a=pos[e.from], b=pos[e.to]; if(!a||!b)continue;
    const isBack = layer[e.to] <= layer[e.from];
    let d, cls, mk;
    if(!isBack){ const x1=a.x+NW,y1=a.y+NH/2,x2=b.x,y2=b.y+NH/2,mx=(x1+x2)/2;
      d=`M ${x1} ${y1} C ${mx} ${y1}, ${mx} ${y2}, ${x2} ${y2}`; cls="medge"; mk="url(#fwd-"+uid+")"; }
    else { const x1=a.x+NW/2,y1=a.y+NH, x2=b.x+NW/2,y2=b.y+NH, dip=Math.max(y1,y2)+BACKDIP;
      d=`M ${x1} ${y1} C ${x1} ${dip}, ${x2} ${dip}, ${x2} ${y2}`; cls="medge back"; mk="url(#back-"+uid+")"; }
    svg.appendChild(svgEl("path",{class:cls, d, "marker-end":mk})); }
  for(const s of ordered){ const p=pos[s], c=stateColor(s);
    const g=svgEl("g",{class:"mnode", "data-state":s});
    g.appendChild(svgEl("rect",{x:p.x,y:p.y,width:NW,height:NH,rx:6,stroke:c,"stroke-width":1.5}));
    g.appendChild(svgEl("rect",{x:p.x,y:p.y,width:4,height:NH,fill:c}));
    const label=svgEl("text",{x:p.x+12,y:p.y+NH/2+4});
    label.appendChild(document.createTextNode(trunc(s,15)));
    g.appendChild(label);
    const fl=flagOf[s];
    if(fl){ const tip=[fl.initial?"initial":"",fl.gating?"gating":"",fl.terminal?"terminal":"",fl.description||""].filter(Boolean).join(" · ");
      if(tip) g.appendChild(svgEl("title",{},[document.createTextNode(tip)])); }
    g.addEventListener("click",()=>showStateDetail(s));
    svg.appendChild(g); }
  box.appendChild(svg);
  // Legend: each state and what it does, doubling as the prompt index.
  const leg=el("div",{class:"mlegend"});
  for(const s of ordered){ const fl=flagOf[s];
    const row=el("div",{class:"mlegrow", "data-state":s});
    const nm=el("span",{class:"mlegname"}); nm.appendChild(dot(stateColor(s)));
    nm.appendChild(document.createTextNode(s));
    const ds=el("span",{class:"mlegdesc",text:(fl&&fl.description)||""});
    row.appendChild(nm); row.appendChild(ds);
    row.addEventListener("click",()=>showStateDetail(s));
    leg.appendChild(row); }
  box.appendChild(leg);
  root.appendChild(box);
}
function showStateDetail(name){ MSTATE=name; highlightState(name); renderMachineDetail(name); }
function renderMachineDetail(name){
  const box=machineDetailEl; if(!box) return; box.innerHTML="";
  const ms=name?machineState(IX.plan,name):null;
  if(!ms){ box.appendChild(el("div",{class:"hint",text:"Click a state to read its prompt."})); return; }
  const head=el("div",{class:"mdhead"});
  const c=stateColor(name); const pl=el("span",{class:"pill",text:name}); pl.style.background=c; pl.style.color=pillInk(c);
  head.appendChild(pl);
  const flags=[]; if(ms.initial)flags.push("initial"); if(ms.terminal)flags.push("terminal"); if(ms.gating)flags.push("gating");
  if(ms.visits)flags.push(`counted ×${ms.visits}`);
  if(flags.length) head.appendChild(el("span",{class:"flags",text:flags.join(" · ")}));
  box.appendChild(head);
  if(ms.description) box.appendChild(el("div",{class:"desc",text:ms.description}));
  box.appendChild(el("div",{class:"mdlabel",text:"prompt (template)"}));
  if(ms.instructions) box.appendChild(el("pre",{class:"prompt",text:ms.instructions}));
  else box.appendChild(el("div",{class:"hint",text:"No prompt defined for this state."}));
}
function highlightState(state){
  document.querySelectorAll("[data-state]").forEach(c=>c.classList.toggle("cur", c.getAttribute("data-state")===state));
}

// ---- running now: actual runtime slots -------------------------------------
function renderRunning(){
  const box=document.getElementById("running");
  // Top-level tasks with an active runtime slot — the actual running work streams.
  const running=IX.top.map(id=>IX.byId[id]).filter(isRunningNow);
  box.innerHTML="";
  if(!running.length){ box.className="panel running"; return; }
  box.className="panel running on";
  const head=el("div",{class:"runhead"}); head.innerHTML=`Running now &middot; <b>${running.length}</b>`;
  box.appendChild(head);
  const row=el("div",{class:"runrow"});
  for(const n of running){ const c=stateColor(n.state);
    const chip=el("div",{class:"runchip", "aria-label":`${n.id} · ${n.title}`});
    chip.appendChild(el("span",{class:"spinner"}));
    chip.appendChild(el("span",{class:"id",text:n.id}));
    chip.appendChild(el("span",{class:"rst",text:trunc(n.title,24)}));
    const pl=el("span",{class:"pill",text:n.state}); pl.style.background=c; pl.style.color=pillInk(c);
    chip.appendChild(pl);
    chip.addEventListener("click",()=>select(n.id));
    row.appendChild(chip); }
  box.appendChild(row);
}

// ---- selection --------------------------------------------------------------
function applySelectionVisual(){
  for(const id in rowEls) rowEls[id].classList.toggle("sel", id===SEL);
  for(const id in nodeEls) nodeEls[id].classList.toggle("sel", id===SEL);
}
function select(id){
  if(!IX.byId[id]) return;
  SEL=id;
  setHash(id);
  applySelectionVisual();
  renderSurroundings();
  showStateDetail(IX.byId[id].state);   // machine prompt follows the selected task's state
  if(rowEls[id]) rowEls[id].scrollIntoView({block:"nearest"});
}
// ---- deep linking (§FS-rhei-viz §1) -----------------------------------------
// The selected node is mirrored into the URL hash so a link opens straight on a
// node's surroundings, and pasting/editing the hash (or back/forward) reselects.
// replaceState keeps keyboard navigation from flooding browser history; on the
// offline file:// surface where it can be blocked we fall back to location.hash.
let SUPPRESS_HASH=false;
function setHash(id){
  if(!id) return;
  const h="#"+encodeURIComponent(id);
  if(location.hash===h) return;
  try{ history.replaceState(null,"",h); }
  catch(e){ SUPPRESS_HASH=true; location.hash=h; }
}
function nodeFromHash(){
  if(!IX || !location.hash) return null;
  const id=decodeURIComponent(location.hash.slice(1));
  return IX.byId[id] ? id : null;
}
function copyNodeLink(id, btnEl){
  setHash(id);
  const url=location.href, restore=btnEl.textContent;
  const done=()=>{ btnEl.textContent="copied"; setTimeout(()=>{ btnEl.textContent=restore; },1200); };
  if(navigator.clipboard && navigator.clipboard.writeText){
    navigator.clipboard.writeText(url).then(done).catch(()=>fallbackCopy(url,done));
  } else fallbackCopy(url,done);
}
function fallbackCopy(text, done){
  try{ const ta=document.createElement("textarea"); ta.value=text;
    ta.style.position="fixed"; ta.style.opacity="0"; document.body.appendChild(ta);
    ta.select(); document.execCommand("copy"); document.body.removeChild(ta); done(); }
  catch(e){ /* clipboard blocked; the URL bar still carries the node hash */ }
}
window.addEventListener("hashchange",()=>{
  if(SUPPRESS_HASH){ SUPPRESS_HASH=false; return; }
  const id=nodeFromHash();
  if(id && id!==SEL) select(id);
});
function move(delta){
  const i=IX.order.indexOf(SEL); if(i<0)return;
  const j=Math.min(IX.order.length-1, Math.max(0, i+delta));
  select(IX.order[j]);
}

// ---- supplementary scanning views (§FS-rhei-viz §12) ------------------------
// Secondary to the Flow view: dense aids that consume the same /snapshot data.
// Operational views (Journal/Slots/Cost/Links) need the live runtime overlay;
// the charts (Gantt/Cube/Sankey) work from the task list alone, so they render
// in a static page too.
let SUPP="none";
function emptyNote(t){ return el("div",{class:"none",text:t}); }
function fmtCost(micro, currency){ if(micro==null) return "—";
  const v=micro/1e6; return (currency==="USD"||!currency) ? "$"+v.toFixed(4) : v.toFixed(4)+" "+currency; }
function costVal(a){ return a ? (a.cost_micro ?? a.priced_cost_micro) : null; }
function fmtNum(n){ return n==null ? "—" : Number(n).toLocaleString(); }
function fmtDur(ms){ if(ms==null) return "—"; const s=Math.round(ms/1000);
  if(s<60) return s+"s"; const m=Math.floor(s/60); return m+"m"+String(s%60).padStart(2,"0")+"s"; }
function fmtTime(ms){ if(!ms) return ""; const d=new Date(ms);
  return [d.getHours(),d.getMinutes(),d.getSeconds()].map(x=>String(x).padStart(2,"0")).join(":"); }
function dimVal(d){ return d && d.value!=null ? d.value : null; }
function taskAccounting(id){
  const rt=runtimeFor(id);
  return rt&&rt.accounting ? rt.accounting : null;
}
function directAccounting(id){
  const acc=taskAccounting(id);
  return acc&&acc.direct ? acc.direct : null;
}
function accountingRow(label, a){
  const row=el("tr");
  row.appendChild(el("td",{text:label}));
  row.appendChild(el("td",{class:"num",text:a?fmtCost(costVal(a),a.currency):"—"}));
  row.appendChild(el("td",{class:"num",text:a?fmtNum(dimVal(a.total)):"—"}));
  row.appendChild(el("td",{class:"num",text:a?fmtNum(dimVal(a.input_total)):"—"}));
  row.appendChild(el("td",{class:"num",text:a?fmtNum(dimVal(a.input_cached_read)):"—"}));
  row.appendChild(el("td",{class:"num",text:a?fmtNum(dimVal(a.output_total)):"—"}));
  return row;
}
function renderAccountingGrid(a){
  const g=el("div",{class:"acct-grid"});
  const add=(k,v)=>{ g.appendChild(el("div",{class:"k",text:k})); g.appendChild(el("div",{class:"v",text:v})); };
  add("cost", a?fmtCost(costVal(a), a.currency):"—");
  add("total tokens", a?fmtNum(dimVal(a.total)):"—");
  add("input tokens", a?fmtNum(dimVal(a.input_total)):"—");
  add("input cached", a?fmtNum(dimVal(a.input_cached_read)):"—");
  add("output tokens", a?fmtNum(dimVal(a.output_total)):"—");
  return g;
}
function renderTokenSection(n){
  const frag=document.createDocumentFragment();
  frag.appendChild(el("h3",{text:"tokens"}));
  const acc=taskAccounting(n.id);
  if(!acc){
    frag.appendChild(emptyNote("No token data reported yet."));
    return frag;
  }
  // §FS-rhei-cost-accounting.9: selected tasks show direct and subtree token rollups.
  const tbl=el("table",{class:"stable"});
  const h=el("tr");
  ["scope","cost","total","input","input cached","output"].forEach((t,i)=>h.appendChild(el("th",{text:t,class:i>0?"num":""})));
  tbl.appendChild(h);
  tbl.appendChild(accountingRow("direct", acc.direct));
  tbl.appendChild(accountingRow("subtree", acc.subtree));
  frag.appendChild(tbl);
  return frag;
}
// In a live render, an artifact/log path opens in the operator's editor via the
// loopback /open route (§FS-rhei-viz §11); in a static render the link is
// illustrative and points at the (relative) path directly.
function openLink(path, text, title){
  if(LIVE){ const a=el("a",{href:"#",text:text!=null?text:path, title:title||""});
    a.addEventListener("click",e=>{ e.preventDefault(); fetch("open?path="+encodeURIComponent(path)).catch(()=>{}); });
    return a; }
  return el("a",{href:path,target:"_blank",text:text!=null?text:path, title:title||""});
}
function suppViews(){
  const hasRun = !!(IX.plan.slots || IX.plan.recent || IX.plan.accounting);
  const v=[];
  if(hasRun) v.push(["cost","Cost"],["journal","Journal"],["slots","Slots"]);
  v.push(["gantt","Gantt"],["cube","Cube"],["sankey","Sankey"]);
  if(hasRun || (IX.plan.links&&IX.plan.links.length)) v.push(["links","Links"]);
  return v;
}
function renderSupp(){
  const root=document.getElementById("supp"); const views=suppViews();
  if(!views.some(v=>v[0]===SUPP)) { if(SUPP!=="none") SUPP="none"; }
  root.innerHTML="";
  const tabs=el("div",{class:"stabs"});
  tabs.appendChild(el("span",{class:"lbl",text:"more views"}));
  const mk=(k,lbl)=>{ const b=el("button",{class:"stab"+(SUPP===k?" on":""),text:lbl});
    b.addEventListener("click",()=>{ SUPP=k; renderSupp(); }); return b; };
  tabs.appendChild(mk("none","hide"));
  for(const [k,lbl] of views) tabs.appendChild(mk(k,lbl));
  root.appendChild(tabs);
  const body=el("div",{class:"sbody"}); root.appendChild(body);
  ({ journal:suppJournal, slots:suppSlots, cost:suppCost, gantt:suppGantt,
     cube:suppCube, sankey:suppSankey, links:suppLinks }[SUPP]
    || (b=>b.appendChild(emptyNote("Dense scanning aids — pick a view. The Flow view above is primary."))))(body);
}
function suppJournal(body){
  const lines=IX.plan.recent||[];
  if(!lines.length){ body.appendChild(emptyNote("No journal lines yet.")); return; }
  const GL={info:"i",warn:"!",error:"x"};
  for(const l of lines){ const r=el("div",{class:"jrow "+(l.level||"info")});
    r.appendChild(el("span",{class:"jt",text:fmtTime(l.ts_ms)}));
    r.appendChild(el("span",{class:"jglyph",text:GL[l.level]||"i"}));
    r.appendChild(el("span",{text:l.text})); body.appendChild(r); }
}
function suppSlots(body){
  const slots=IX.plan.slots||[];
  if(!slots.length){ body.appendChild(emptyNote("No slots.")); return; }
  const tbl=el("table",{class:"stable"});
  const head=el("tr");
  ["#","task","state","agent","dur","cost","total","input","input cached","output","outcome"]
    .forEach((h,i)=>head.appendChild(el("th",{text:h,class:i>=4&&i<=9?"num":""})));
  tbl.appendChild(head);
  slots.forEach((s,i)=>{ const tr=el("tr");
    tr.appendChild(el("td",{text:String(i)}));
    const tt=el("td"); if(s.task&&IX.byId[s.task]){ const a=el("a",{href:"#",text:s.task}); a.addEventListener("click",e=>{e.preventDefault();select(s.task);}); tt.appendChild(a);} else tt.textContent=s.task||"—"; tr.appendChild(tt);
    tr.appendChild(el("td",{text:s.state||"—"}));
    tr.appendChild(el("td",{text:s.agent||"—"}));
    tr.appendChild(el("td",{class:"num",text:fmtDur(s.duration_ms)}));
    const acc=s.task ? directAccounting(s.task) : null;
    // §FS-rhei-cost-accounting.9: slot rows expose the task's current direct tokens.
    tr.appendChild(el("td",{class:"num",text:acc?fmtCost(costVal(acc),acc.currency):"—"}));
    tr.appendChild(el("td",{class:"num",text:acc?fmtNum(dimVal(acc.total)):"—"}));
    tr.appendChild(el("td",{class:"num",text:acc?fmtNum(dimVal(acc.input_total)):"—"}));
    tr.appendChild(el("td",{class:"num",text:acc?fmtNum(dimVal(acc.input_cached_read)):"—"}));
    tr.appendChild(el("td",{class:"num",text:acc?fmtNum(dimVal(acc.output_total)):"—"}));
    tr.appendChild(el("td",{text:s.outcome||(s.active?"running":"—")}));
    tbl.appendChild(tr); });
  body.appendChild(tbl);
  body.appendChild(el("h3",{text:"current total"}));
  body.appendChild(renderAccountingGrid(IX.plan.accounting||null));
}
function suppCost(body){
  const a=IX.plan.accounting;
  if(a){ body.appendChild(el("h3",{text:"run total"}));
    const g=el("div",{class:"acct-grid"});
    const add=(k,v)=>{ g.appendChild(el("div",{class:"k",text:k})); g.appendChild(el("div",{class:"v",text:v})); };
    add("cost", fmtCost(costVal(a), a.currency));
    add("total tokens", fmtNum(dimVal(a.total)));
    add("input tokens", fmtNum(dimVal(a.input_total)));
    add("input cached", fmtNum(dimVal(a.input_cached_read)));
    add("output tokens", fmtNum(dimVal(a.output_total)));
    add("invocations", fmtNum(a.invocation_count));
    body.appendChild(g);
  }
  const tr=IX.plan.task_runtime||{};
  const rows=IX.top.filter(id=>tr[id]&&tr[id].accounting);
  if(rows.length){ body.appendChild(el("h3",{text:"by top-level task"}));
    const tbl=el("table",{class:"stable"});
    const h=el("tr"); ["task","direct","subtree","total","input","input cached","output"].forEach((t,i)=>h.appendChild(el("th",{text:t,class:i?"num":""}))); tbl.appendChild(h);
    for(const id of rows){ const acc=tr[id].accounting, row=el("tr");
      const tt=el("td"); const a2=el("a",{href:"#",text:id}); a2.addEventListener("click",e=>{e.preventDefault();select(id);}); tt.appendChild(a2); row.appendChild(tt);
      row.appendChild(el("td",{class:"num",text:acc.direct?fmtCost(costVal(acc.direct),acc.direct.currency):"—"}));
      row.appendChild(el("td",{class:"num",text:acc.subtree?fmtCost(costVal(acc.subtree),acc.subtree.currency):"—"}));
      row.appendChild(el("td",{class:"num",text:acc.subtree?fmtNum(dimVal(acc.subtree.total)):"—"}));
      row.appendChild(el("td",{class:"num",text:acc.subtree?fmtNum(dimVal(acc.subtree.input_total)):"—"}));
      row.appendChild(el("td",{class:"num",text:acc.subtree?fmtNum(dimVal(acc.subtree.input_cached_read)):"—"}));
      row.appendChild(el("td",{class:"num",text:acc.subtree?fmtNum(dimVal(acc.subtree.output_total)):"—"}));
      tbl.appendChild(row); }
    body.appendChild(tbl);
  }
  if(!a && !rows.length) body.appendChild(emptyNote("No cost data yet."));
}
function suppLinks(body){
  const links=[...(IX.plan.links||[]),...(IX.plan.auto_links||[])];
  if(!links.length){ body.appendChild(emptyNote("No links.")); return; }
  for(const l of links){ const r=el("div",{class:"linkrow"});
    r.appendChild(el("a",{href:l.url,target:"_blank",text:l.label||l.url}));
    r.appendChild(el("span",{class:"src",text:l.source||""})); body.appendChild(r); }
}
function allItems(){ const out=[]; for(const tid of IX.top){ out.push(tid); for(const c of allDescendants(tid)) out.push(c);} return out; }
function suppGantt(body){
  const items=allItems(); if(!items.length){ body.appendChild(emptyNote("No tasks.")); return; }
  const present=[...new Set(items.map(id=>IX.byId[id].state))].sort((a,b)=>stateIndex(a)-stateIndex(b));
  const colX={}; present.forEach((s,i)=>colX[s]=i);
  const COLW=118, ROWH=22, PADX=170, PADY=26;
  const W=PADX+present.length*COLW, H=PADY+items.length*ROWH+8;
  const svg=svgEl("svg",{viewBox:`0 0 ${W} ${H}`, style:`height:${H}px;min-width:${W}px`});
  present.forEach((s,i)=>{ const x=PADX+i*COLW+COLW/2;
    svg.appendChild(svgEl("line",{x1:x,y1:PADY-8,x2:x,y2:H-4,stroke:"var(--hairline)","stroke-width":1}));
    const t=svgEl("text",{x:x,y:14,"text-anchor":"middle",class:"gst",fill:stateColor(s)}); t.appendChild(document.createTextNode(trunc(s,13))); svg.appendChild(t); });
  items.forEach((id,r)=>{ const n=IX.byId[id], y=PADY+r*ROWH+ROWH/2;
    const lbl=svgEl("text",{x:8,y:y+4,class:"gid"}); lbl.appendChild(document.createTextNode(trunc("  ".repeat(n.depth)+id,24))); svg.appendChild(lbl);
    const x=PADX+colX[n.state]*COLW+COLW/2, c=stateColor(n.state);
    const g=svgEl("g"); g.style.cursor="pointer";
    g.appendChild(svgEl("circle",{cx:x,cy:y,r:6,fill:c}));
    g.appendChild(svgEl("title",{},[document.createTextNode(`${id} · ${n.state}`)]));
    g.addEventListener("click",()=>select(id)); svg.appendChild(g); });
  body.appendChild(svg);
}
function suppCube(body){
  const tops=IX.top; if(!tops.length){ body.appendChild(emptyNote("No tasks.")); return; }
  if(IX.plan.plan_state){ const strip=el("div",{}); strip.style.marginBottom="8px";
    const c=stateColor(IX.plan.plan_state), pl=el("span",{class:"pill",text:"plan · "+IX.plan.plan_state});
    pl.style.background=c; pl.style.color=pillInk(c); strip.appendChild(pl); body.appendChild(strip); }
  const tbl=el("table",{class:"stable"});
  for(const t of tops){ const tr=el("tr");
    const th=el("td"); const a=el("a",{href:"#",text:t}); a.addEventListener("click",e=>{e.preventDefault();select(t);}); th.appendChild(a); tr.appendChild(th);
    const sc=el("td"); const sd=el("span",{class:"heat",title:t+" · "+IX.byId[t].state}); sd.style.background=stateColor(IX.byId[t].state);
    sd.style.cursor="pointer"; sd.addEventListener("click",()=>select(t)); sc.appendChild(sd); tr.appendChild(sc);
    for(const d of allDescendants(t)){ const td=el("td");
      const h=el("span",{class:"heat",title:d+" · "+IX.byId[d].state}); h.style.background=stateColor(IX.byId[d].state);
      h.style.cursor="pointer"; h.addEventListener("click",()=>select(d)); td.appendChild(h); tr.appendChild(td); }
    tbl.appendChild(tr); }
  body.appendChild(el("div",{class:"none",text:"Top-level task × descendant state heatmap. Click a cell to inspect."}));
  body.appendChild(tbl);
}
function suppSankey(body){
  const tops=IX.top.filter(t=>allDescendants(t).length);
  if(!tops.length){ body.appendChild(emptyNote("No descendants to flow.")); return; }
  const stateSet=new Set();
  const flows=tops.map(t=>{ const counts={}; for(const d of allDescendants(t)){ const s=IX.byId[d].state; counts[s]=(counts[s]||0)+1; stateSet.add(s);} return {t,counts}; });
  const states=[...stateSet].sort((a,b)=>stateIndex(a)-stateIndex(b));
  const LH=28, PADY=12, LX=12, RX=330, NW=130, H=PADY*2+Math.max(tops.length,states.length)*LH, W=480;
  const svg=svgEl("svg",{viewBox:`0 0 ${W} ${H}`,style:`height:${H}px;min-width:${W}px`});
  const ly={}, ry={};
  tops.forEach((t,i)=>ly[t]=PADY+i*LH+LH/2);
  states.forEach((s,i)=>ry[s]=PADY+i*LH+LH/2);
  const maxc=Math.max(1,...flows.flatMap(f=>Object.values(f.counts)));
  for(const f of flows) for(const s in f.counts){ const w=1.5+6*f.counts[s]/maxc;
    const y1=ly[f.t], y2=ry[s], x1=LX+NW, x2=RX, mx=(x1+x2)/2;
    svg.appendChild(svgEl("path",{d:`M ${x1} ${y1} C ${mx} ${y1}, ${mx} ${y2}, ${x2} ${y2}`,fill:"none",stroke:stateColor(s),"stroke-width":w,"stroke-opacity":"0.5"})); }
  tops.forEach(t=>{ const g=svgEl("g"); g.style.cursor="pointer";
    g.appendChild(svgEl("rect",{x:LX,y:ly[t]-9,width:NW,height:18,rx:4,fill:"var(--surface-2)",stroke:stateColor(IX.byId[t].state)}));
    const tx=svgEl("text",{x:LX+8,y:ly[t]+4,class:"gid"}); tx.appendChild(document.createTextNode(trunc(t,14))); g.appendChild(tx);
    g.addEventListener("click",()=>select(t)); svg.appendChild(g); });
  states.forEach(s=>{ const g=svgEl("g"), c=stateColor(s);
    g.appendChild(svgEl("rect",{x:RX,y:ry[s]-9,width:NW,height:18,rx:4,fill:c}));
    const tx=svgEl("text",{x:RX+8,y:ry[s]+4,fill:pillInk(c)}); tx.appendChild(document.createTextNode(trunc(s,14))); g.appendChild(tx); svg.appendChild(g); });
  body.appendChild(svg);
}

// ---- top-level render -------------------------------------------------------
function renderLeft(){
  const flow=document.querySelector(".flow");
  if(flow){ flow.classList.toggle("graph", MODE==="graph"); flow.classList.toggle("list", MODE!=="graph"); }
  if(MODE==="graph") renderGraph(); else renderList();
}
function renderLegend(){
  const box=document.getElementById("legend"); box.innerHTML="";
  const items=[["done","completed"],["live","running"],["active","active"],["blocked","blocked"],["gate","gate"],["failed","failed"],["retired","retired"],["idle","idle"]];
  for(const[k,lbl]of items){ const s=el("span",{}); s.appendChild(el("span",{class:"gly",text:GLYPH[k]})); s.appendChild(document.createTextNode(" "+lbl)); box.appendChild(s); }
}
function renderSummary(){
  const cnt={done:0,active:0,live:0,blocked:0,gate:0,failed:0,retired:0,idle:0};
  for(const id of IX.top) cnt[nodeCategory(IX.byId[id])]++;
  const running=IX.top.map(id=>IX.byId[id]).filter(isRunningNow).length;
  const runningPart = hasRuntimeOverlay() ? ` &middot; <b>${running}</b> running` : "";
  const s=document.getElementById("summary");
  s.innerHTML=`<b>${IX.top.length}</b> tasks${runningPart} &middot; <b>${cnt.active}</b> active &middot; <b>${cnt.blocked}</b> blocked &middot; <b>${cnt.gate}</b> gate &middot; <b>${cnt.done}</b> done &middot; <b>${cnt.failed}</b> failed`;
}
function renderMachineLine(){
  const m=IX.plan.machine, line=document.getElementById("machine-line");
  if(m&&m.name){
    const note = LIVE
      ? (LIVE_STALE ? "live · disconnected" : "live · updates in place")
      : "artifact links are illustrative (files appear under runtime/ after a run)";
    line.innerHTML=`states <b>${m.name}</b> &middot; ${note}`;
  } else line.textContent="";
}
function renderPlanTitle(){
  const t=document.getElementById("plan-title");
  t.textContent = (IX.plan && IX.plan.plan_title) ? IX.plan.plan_title : "";
}
function drawAll(plan){
  IX=indexPlan(plan); SEL=null; MSTATE=null;
  for(const k in rowEls) delete rowEls[k]; for(const k in nodeEls) delete nodeEls[k];
  renderPlanTitle(); renderMachineLine(); renderSummary(); renderLegend(); renderRunning(); renderLeft(); renderMachines(); renderSupp();
  // A node named in the URL hash wins, so a shared link opens on it; otherwise
  // the resting view leads with running work. §FS-rhei-viz §1, §5.
  const firstRunning=IX.order.find(id=>isRunningNow(IX.byId[id]));
  const firstActive=IX.order.find(id=>nodeCategory(IX.byId[id])==="active");
  select(nodeFromHash() || firstRunning || firstActive || IX.top[0] || IX.order[0]);
}

// ---- live: poll /snapshot and update in place (§FS-rhei-viz §7.1) -----------
// Liveness is shown by content changing where it sits, never by movement: a
// poll updates row text, pills, the running-now strip, and the summary without
// reflow, and preserves the operator's scroll position and selection.
function sameStructure(ix, snap){
  const a=ix.order.join("");
  const b=(snap.tasks||[]).map(t=>t.id).join("");
  return a===b;
}
function applyLive(snap){
  if(!IX || !sameStructure(IX, snap)){
    const keepSel = (IX && SEL && IX.byId[SEL]) ? SEL : null;
    drawAll(snap);                       // first paint or the plan's shape changed
    if(keepSel && IX.byId[keepSel]) select(keepSel);
    return;
  }
  const y=window.scrollY, prevSel=SEL, changed={};
  const prevCat = (prevSel && IX.byId[prevSel]) ? nodeCategory(IX.byId[prevSel]) : null;
  const prevAccounting = prevSel
    ? JSON.stringify((((IX.plan.task_runtime||{})[prevSel]||{}).accounting)||null)
    : null;
  const nextAccounting = prevSel
    ? JSON.stringify((((snap.task_runtime||{})[prevSel]||{}).accounting)||null)
    : null;
  for(const t of (snap.tasks||[])){ const n=IX.byId[t.id];
    if(n && n.state!==t.state){ changed[t.id]=true; n.state=t.state; } }
  IX.plan = snap;                        // refresh machine / about / accounting
  const nextCat = (prevSel && IX.byId[prevSel]) ? nodeCategory(IX.byId[prevSel]) : null;
  refreshListStates();
  if(MODE==="graph") renderGraph();
  renderPlanTitle(); renderMachineLine(); renderSummary(); renderRunning();
  const supScroll = (document.querySelector(".sbody")||{}).scrollTop || 0;
  renderSupp();
  const sb=document.querySelector(".sbody"); if(sb) sb.scrollTop=supScroll;
  if(prevSel && (changed[prevSel] || prevCat!==nextCat || prevAccounting!==nextAccounting)){
    // §FS-rhei-cost-accounting.9: selected-task token rollups live-refresh from /snapshot.
    renderSurroundings(); showStateDetail(IX.byId[prevSel].state);
  }
  applySelectionVisual();
  window.scrollTo(0, y);
}
function refreshListStates(){
  for(const id in rowEls){ const n=IX.byId[id]; if(!n) continue;
    const row=rowEls[id], cat=nodeCategory(n), c=stateColor(n.state);
    row.setAttribute("data-cat", cat);
    const lead=row.querySelector(".lead"); if(lead){ lead.innerHTML="";
      lead.appendChild(cat==="live" ? el("span",{class:"spinner"}) : el("span",{class:"gly", text:nodeGlyph(n)})); }
    const pl=row.querySelector(".pill"); if(pl){ pl.textContent=n.state; pl.style.background=c; pl.style.color=pillInk(c); }
    const prog=row.querySelector(".prog");
    if(prog && n.children.length){ const p=subtreeProgress(IX,id); prog.textContent=`${p.done}/${p.total} ✓`; }
  }
}
function poll(){
  refreshSnapshotOnce()
    .catch(()=>{                         // tolerate transient transport failures
      POLL_FAILS++;
      if(POLL_FAILS>=2) clearRunningOverlay();
    })
    .finally(()=>{ pollLog(); setTimeout(poll, 1000); });
}
function refreshSnapshotOnce(){
  return fetch("snapshot",{cache:"no-store"})
    .then(r=>r.ok?r.json():Promise.reject())
    .then(snap=>{
      if(snap && !snap.error){
        POLL_FAILS=0; LIVE_STALE=false; applyLive(snap);
      }
      return snap;
    });
}
function clearRunningOverlay(){
  // Closed live transports keep plan data but clear stale runtime slots. §FS-rhei-viz.7.1
  if(!IX || !IX.plan || !hasRuntimeOverlay()) return;
  let changed=false;
  const runtime=IX.plan.task_runtime||{};
  for(const rt of Object.values(runtime)){
    if(rt && rt.in_slot!=null){ delete rt.in_slot; delete rt.template_context; changed=true; }
  }
  if(Array.isArray(IX.plan.slots)){
    for(const s of IX.plan.slots){ if(s && s.active){ s.active=false; changed=true; } }
  }
  if(!changed) return;
  LIVE_STALE=true;
  refreshListStates();
  if(MODE==="graph") renderGraph();
  renderMachineLine(); renderSummary(); renderRunning(); renderSupp();
  if(SEL && IX.byId[SEL]) renderSurroundings();
  applySelectionVisual();
}
// Stream the selected running task's durable log into its terminal, appending
// only the new bytes since the last offset. Liveness shown in place, no jump
// unless the operator is already at the bottom. §FS-rhei-viz-ux §4.
function pollLog(){
  if(!LIVE || !LOGTERM || !LOGTASK) return;
  const term=LOGTERM, task=LOGTASK, key=LOGKEY, off=LOGOFF;
  fetch("log?task="+encodeURIComponent(task)+"&from="+off,{cache:"no-store"})
    .then(r=>r.ok?r.json():null)
    .then(j=>{ if(!j || LOGTERM!==term || LOGKEY!==key) return;   // selection moved on
      if(j.data){ const atBottom = term.scrollHeight - term.scrollTop - term.clientHeight < 30;
        appendLog(term, j.data);
        if(atBottom) term.scrollTop=term.scrollHeight; }
      LOGOFF=j.next; })
    .catch(()=>{});
}
function appendLog(term, data){
  const buf=(term._resid||"")+data, parts=buf.split("\n");
  term._resid=parts.pop();              // hold a partial line until its newline arrives
  for(const line of parts) term.appendChild(termLine(line));
}
function sendIntervene(node, message){
  const rt=runtimeFor(node.id)||{};
  const body={task_id:node.id, message};
  if(rt.in_slot!=null) body.slot=rt.in_slot;
  return fetch("intervene",{method:"POST",headers:{"Content-Type":"application/json"},
    body:JSON.stringify(body)})
    .then(r=>r.ok?r.json():{ok:false,error:"intervene request failed"})
    .then(j=>j&&j.ok ? {ok:true} : {ok:false,error:(j&&j.error)||"intervention was not delivered"})
    .catch(err=>({ok:false,error:err&&err.message?err.message:"intervene request failed"}));
}
function sendGateTransition(node, to, result){
  // Blank is none: an untouched field must not become a result entry that says
  // nothing. The host trims again on arrival. §FS-rhei-viz.5.1
  const body={task_id:node.id, from:node.state, to};
  const trimmed=(result||"").trim();
  if(trimmed) body.result=trimmed;
  return fetch("transition-gate",{method:"POST",headers:{"Content-Type":"application/json"},
    body:JSON.stringify(body)})
    .then(r=>r.ok?r.json():{ok:false,error:"gate transition request failed"})
    .then(j=>j&&j.ok ? {ok:true,to:j.to} : {ok:false,error:(j&&j.error)||"gate transition failed"})
    .catch(err=>({ok:false,error:err&&err.message?err.message:"gate transition request failed"}));
}

// ---- bootstrap --------------------------------------------------------------
function setMode(m){ MODE=m;
  document.querySelectorAll("#mode button").forEach(x=>x.classList.toggle("on", x.dataset.mode===m));
  renderLeft(); applySelectionVisual(); }
function bindControls(){
  document.querySelectorAll("#mode button").forEach(b=>b.addEventListener("click",()=>setMode(b.dataset.mode)));
  document.addEventListener("keydown",e=>{
    if(["SELECT","TEXTAREA","INPUT"].includes(e.target.tagName)) return;
    if(e.key==="ArrowDown"||e.key==="j"){ e.preventDefault(); move(1); }
    else if(e.key==="ArrowUp"||e.key==="k"){ e.preventDefault(); move(-1); }
    else if(e.key==="g"){ setMode("graph"); }
    else if(e.key==="l"){ setMode("list"); }
  });
}
function initStatic(bundle){
  const sel=document.getElementById("plan"), keys=Object.keys(bundle);
  if(!keys.length){ document.getElementById("surr").textContent="No plan data."; return; }
  if(keys.length>1) document.getElementById("plan-picker").hidden=false;
  for(const k of keys){ sel.appendChild(el("option",{value:k,text:k})); }
  sel.value = keys.find(k=>k.endsWith("-demo")) || keys.find(k=>k.includes("inflight")) || keys[0];
  sel.addEventListener("change",()=>drawAll(bundle[sel.value]));
  bindControls();
  drawAll(bundle[sel.value]);
}
function initLive(){
  LIVE=true;
  document.getElementById("live-dot").hidden=false;
  bindControls();
  poll();
}
function init(){
  if(BOOT && typeof BOOT==="object" && Object.keys(BOOT).length) initStatic(BOOT);
  else initLive();
}
init();
</script>
</body>
</html>