diff --git a/flow-state/debug.html b/flow-state/debug.html
index f38f6a0..ace5b60 100644
--- a/flow-state/debug.html
+++ b/flow-state/debug.html
@@ -33,6 +33,22 @@
     pre { padding: 8px 10px; overflow-x: auto; margin: 6px 0 0; }
     .note { color: #6b7280; font-size: 12px; max-width: 80ch; }
     .warn { color: #eab308; }
+    .chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 2px; }
+    .chips a {
+        background: #080a0f; border: 1px solid #1a1e28; border-radius: 3px;
+        padding: 1px 7px; font-size: 12px; white-space: nowrap;
+    }
+    .chips a:hover { border-color: #7dd3fc; text-decoration: none; }
+    .chips .fam { width: 100%; color: #565f70; font-size: 11px; letter-spacing: .08em;
+        text-transform: uppercase; margin-top: 6px; }
+    .chips .fam:first-child { margin-top: 0; }
+    .links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
+    .links a {
+        background: #080a0f; border: 1px solid #1a1e28; border-radius: 3px;
+        padding: 1px 7px; font-size: 12px;
+    }
+    .links a:hover { border-color: #7dd3fc; text-decoration: none; }
+    .links .lbl { color: #565f70; font-size: 12px; align-self: center; }
 </style>
 </head>
 <body>
@@ -43,6 +59,48 @@
         many.
     </p>
 
+    <h2>Vis testing battery</h2>
+    <p class="lede">
+        The testing library: every bank song, every scene, every venue, the
+        param/scenario combos worth re-running, and the lab pages. Rendered
+        from the live registries (<code>src/debug/battery.js</code>), so a new
+        song, scene or venue joins the battery for free.
+    </p>
+    <div class="grid">
+        <div class="card fast">
+            <h3>songs — the bank, one click each</h3>
+            <p>Each song holds a corner of the feature space (<code>covers</code>).
+               App loads the song; +venue adds the room; strip is one frame per
+               30 s across the whole song.</p>
+            <div id="battery-songs" class="chips"><span class="note">loading…</span></div>
+        </div>
+        <div class="card fast">
+            <h3>venues — every room</h3>
+            <p>Pinned gallery first (fastest way to review a venue change), then
+               the app and the filmstrip with the room on.</p>
+            <div id="battery-venues"><span class="note">loading…</span></div>
+        </div>
+    </div>
+
+    <h2>Scenes — every visualizer</h2>
+    <p class="note">
+        Gate is the per-scene acceptance battery (renders, animates,
+        deterministic, distinct, sweep, flash, traits); wide is the scene on
+        six songs × six seeds.
+    </p>
+    <div class="grid">
+        <div class="card fast">
+            <h3>by family</h3>
+            <div id="battery-scenes" class="chips"><span class="note">loading…</span></div>
+        </div>
+    </div>
+
+    <h2>Scenarios — params and combos</h2>
+    <div class="grid" id="battery-scenarios"></div>
+
+    <h2>Lab pages + headless runners</h2>
+    <div class="grid" id="battery-labs"></div>
+
     <h2>Looking at output</h2>
     <div class="grid">
         <div class="card fast">
@@ -212,5 +270,109 @@ npm test</pre>
         session over a file called <code>clicktrack.js</code> — or a dev server
         caught mid-restart.
     </p>
+<script type="module">
+import {
+    songNames, songCovers, families, scenesIn,
+    venueNames, appLinks, sceneLinks, venueLinks,
+    SCENARIOS, LABS,
+} from '/src/debug/battery.js';
+
+const el = (tag, cls, text) => {
+    const e = document.createElement(tag);
+    if (cls) e.className = cls;
+    if (text !== undefined) e.textContent = text;
+    return e;
+};
+const link = (href, text) => {
+    const a = document.createElement('a');
+    a.href = href;
+    a.textContent = text;
+    return a;
+};
+
+// Songs: one row per bank song — name, corner it holds, app / +venue / strip.
+{
+    const host = document.getElementById('battery-songs');
+    host.replaceChildren();
+    for (const name of songNames()) {
+        const covers = songCovers(name);
+        const L = appLinks(name);
+        const row = el('span', 'fam', `${name} — ${covers} `);
+        host.appendChild(row);
+        host.appendChild(link(L.app, 'app'));
+        host.appendChild(link(L.venue, '+venue'));
+        host.appendChild(link(`/filmstrip.html?song=${encodeURIComponent(name)}`, 'strip'));
+    }
+}
+
+// Venues: pinned gallery + app + filmstrip per room.
+{
+    const host = document.getElementById('battery-venues');
+    host.replaceChildren();
+    for (const name of venueNames()) {
+        const L = venueLinks(name);
+        const card = el('div', null);
+        card.appendChild(el('p', null, name));
+        const row = el('div', 'links');
+        row.appendChild(link(L.gallery, 'gallery'));
+        row.appendChild(link(L.app, 'app +venue'));
+        row.appendChild(link(L.filmstrip, 'strip'));
+        card.appendChild(row);
+        host.appendChild(card);
+    }
+}
+
+// Scenes: one chip per visualizer (→ gate), ◈ per scene (→ wide gallery).
+{
+    const host = document.getElementById('battery-scenes');
+    host.replaceChildren();
+    for (const fam of families()) {
+        host.appendChild(el('span', 'fam', fam));
+        for (const name of scenesIn(fam)) {
+            const L = sceneLinks(name);
+            host.appendChild(link(L.gate, name));
+            const w = link(L.wide, '◈');
+            w.title = `${name} — wide gallery (6 songs × 6 seeds)`;
+            host.appendChild(w);
+        }
+    }
+}
+
+// Scenarios: curated cards from the library.
+{
+    const host = document.getElementById('battery-scenarios');
+    host.replaceChildren();
+    for (const s of SCENARIOS) {
+        const card = el('div', 'card');
+        card.appendChild(el('h3', null, s.title));
+        card.appendChild(el('p', null, s.desc));
+        const row = el('div', 'links');
+        for (const [label, href] of s.links) row.appendChild(link(href, label));
+        card.appendChild(row);
+        host.appendChild(card);
+    }
+}
+
+// Labs: pages + the CLI that drives them.
+{
+    const host = document.getElementById('battery-labs');
+    host.replaceChildren();
+    for (const lab of LABS) {
+        const card = el('div', 'card cli');
+        card.appendChild(el('h3', null, lab.title));
+        card.appendChild(el('p', null, lab.desc));
+        if (lab.href) {
+            const row = el('div', 'links');
+            row.appendChild(link(lab.href, 'open'));
+            card.appendChild(row);
+        }
+        if (lab.cli) {
+            const pre = el('pre', null, lab.cli);
+            card.appendChild(pre);
+        }
+        host.appendChild(card);
+    }
+}
+</script>
 </body>
 </html>
diff --git a/flow-state/src/debug/battery.js b/flow-state/src/debug/battery.js
new file mode 100644
index 0000000..e97e4f6
--- /dev/null
+++ b/flow-state/src/debug/battery.js
@@ -0,0 +1,167 @@
+// The vis testing battery as a library.
+//
+// Every manual testing entry point this project has — bank songs, scenes by
+// family, venues, param/scenario combos, the throwaway lab pages and the
+// headless CLI runners — collected in one place so debug.html (and anything
+// headless later) renders them from the live registries instead of a stale
+// hardcoded list. Adding a song, scene or venue updates the battery for free.
+//
+// Pure URL builders + data: no DOM, no WebGL, no wall-clock. Safe to import
+// anywhere, including node (nothing here touches metadata.json, which needs
+// Vite's JSON handling — so scene *coverage* is deliberately not imported).
+
+import { SONGS } from '../audio/songbank.js';
+import { scenes } from '../scenes/registry.js';
+import { venues } from '../venues/registry.js';
+
+const q = (params) => {
+    const p = new URLSearchParams();
+    for (const [k, v] of Object.entries(params)) {
+        if (v === null || v === undefined || v === '') continue;
+        p.set(k, String(v));
+    }
+    const s = p.toString();
+    return s ? `?${s}` : '';
+};
+
+export const songNames = () => SONGS.map((s) => s.name);
+export const songCovers = (name) =>
+    (SONGS.find((s) => s.name === name) || {}).covers || '';
+export const sceneNames = () => scenes.map((s) => s.name);
+export const venueNames = () => venues.map((v) => v.name);
+export const families = () => {
+    const out = [];
+    for (const s of scenes) if (!out.includes(s.family)) out.push(s.family);
+    return out;
+};
+export const scenesIn = (family) =>
+    scenes.filter((s) => s.family === family).map((s) => s.name);
+
+/** App links for a bank song: plain, with venue, pinned seeds. */
+export const appLinks = (song) => ({
+    app: `/${q({ song })}`,
+    venue: `/${q({ song, venue: 1 })}`,
+    seed1: `/${q({ song, seed: 1 })}`,
+    seed2: `/${q({ song, seed: 2 })}`,
+});
+
+/** Per-scene links: acceptance battery + wide single-scene gallery. */
+export const sceneLinks = (name) => ({
+    gate: `/checks.html${q({ scene: name })}`,
+    wide: `/gallery.html${q({ scene: name, songs: 6, seeds: 6 })}`,
+});
+
+/** Per-venue links: gallery pinned to the venue, app + filmstrip with venue. */
+export const venueLinks = (name) => ({
+    gallery: `/venue-gallery.html${q({ venueSel: name })}`,
+    app: `/${q({ song: 'centre', venue: 1 })}`,
+    filmstrip: `/filmstrip.html${q({ song: 'centre,ember', venue: 1, venueSel: name })}`,
+});
+
+/**
+ * Curated param/scenario combos: each is one question with the links that
+ * answer it. Songs are corners of the feature space (see songbank.js
+ * `covers`); pairs differ in exactly one control where possible.
+ */
+export const SCENARIOS = [
+    {
+        title: 'venue A/B, same song',
+        desc: 'Does the room earn its place? Same seed both sides — only the venue differs.',
+        links: [
+            ['no venue', `/${q({ song: 'centre', seed: 7 })}`],
+            ['venue', `/${q({ song: 'centre', seed: 7, venue: 1 })}`],
+        ],
+    },
+    {
+        title: 'seed reroll, same song',
+        desc: 'Same music, two draws. Should read as two videos, not two grades of one.',
+        links: [
+            ['seed 1', `/${q({ song: 'ember', seed: 1 })}`],
+            ['seed 2', `/${q({ song: 'ember', seed: 2 })}`],
+        ],
+    },
+    {
+        title: 'tempo ends',
+        desc: '62bpm beatless vs 174bpm broken. Motion should follow the song, not the scene.',
+        links: [
+            ['drone 62', `/${q({ song: 'drone' })}`],
+            ['runner 174', `/${q({ song: 'runner' })}`],
+        ],
+    },
+    {
+        title: 'degenerate case',
+        desc: 'Two sections. Must not break — still is the regression test for it.',
+        links: [['still', `/${q({ song: 'still' })}`]],
+    },
+    {
+        title: 'hostile cases',
+        desc: 'Limitered, noisiest, brightest: the corners that collapse palettes and directors.',
+        links: [
+            ['slab (flat)', `/${q({ song: 'slab' })}`],
+            ['grit (noise)', `/${q({ song: 'grit' })}`],
+            ['flare (bright)', `/${q({ song: 'flare' })}`],
+        ],
+    },
+    {
+        title: 'most sections',
+        desc: 'Lattice rotates rosters the hardest. Watch for A/B ping-ponging and repeats.',
+        links: [['lattice', `/${q({ song: 'lattice' })}`]],
+    },
+    {
+        title: 'venue × viz pins',
+        desc: 'One room, chosen viz behind it. The fastest way to review a venue change.',
+        links: [
+            ['Ride + corridor', `/venue-gallery.html${q({ venueSel: 'Ride', viz: 'Synthwave Corridor', rows: 2, cols: 3 })}`],
+            ['Chamber + swarm', `/venue-gallery.html${q({ venueSel: 'Chamber', viz: 'Swarm', rows: 2, cols: 3 })}`],
+            ['Stage + pylons', `/venue-gallery.html${q({ venueSel: 'Stage', viz: 'Pylon Field 3D', rows: 2, cols: 3 })}`],
+        ],
+    },
+    {
+        title: 'filmstrip with venue',
+        desc: 'Does the room hold for two minutes, or does it drift, flash, or empty out?',
+        links: [
+            ['centre + ember', `/filmstrip.html${q({ song: 'centre,ember', venue: 1 })}`],
+        ],
+    },
+    {
+        title: 'fresh scene gates',
+        desc: 'The per-scene battery for the scenes most recently touched.',
+        links: [
+            ['Swarm', `/checks.html${q({ scene: 'Swarm' })}`],
+            ['Assembly', `/checks.html${q({ scene: 'Assembly' })}`],
+            ['Pylon Field 3D', `/checks.html${q({ scene: 'Pylon Field 3D' })}`],
+        ],
+    },
+];
+
+/**
+ * The graduated throwaways: single-purpose lab pages plus the headless
+ * runners that drive them. Linked, not duplicated — the pages stay where
+ * the runners expect them.
+ */
+export const LABS = [
+    {
+        title: 'ride lab',
+        href: '/ride-lab.html',
+        desc: 'One Ride, four inspection cameras. Settles which way the car faces.',
+        cli: 'node ride-lab-run.mjs',
+    },
+    {
+        title: 'passerby lab',
+        href: '/passerby-lab.html',
+        desc: 'Hunts a seed with a passerby cue on elegy, renders the shot head/mid/tail.',
+        cli: null,
+    },
+    {
+        title: 'ride closeup',
+        href: '/venue-gallery.html?rows=1&cols=1&venueSel=Ride',
+        desc: 'Wheels + beams at 2×. Same framing the closeup runner screenshots.',
+        cli: 'node ride-closeup.mjs',
+    },
+    {
+        title: 'venue gate loop',
+        href: null,
+        desc: 'Headless Chromium against vite dev: phases, filmstrip, gallery, variety. Screenshots to logs/venue/.',
+        cli: 'node tools/venue-check.js --quick',
+    },
+];