first-commit

skills/hyperframes/scripts/animation-map.mjs

@@ -0,0 +1,601 @@
+#!/usr/bin/env node
+// animation-map.mjs — HyperFrames animation map for agents
+//
+// Reads every GSAP timeline registered in window.__timelines, enumerates
+// tweens, samples bboxes at N points per tween, computes flags and
+// human-readable summaries. Outputs a single animation-map.json.
+//
+// Usage:
+//   node skills/hyperframes/scripts/animation-map.mjs <composition-dir> \
+//     [--frames N] [--out <dir>] [--min-duration S] [--width W] [--height H] [--fps N]
+
+import { mkdir, writeFile } from "node:fs/promises";
+import { resolve, join } from "node:path";
+import { hyperframesPackageSpec, importPackagesOrBootstrap } from "./package-loader.mjs";
+
+const {
+  createFileServer,
+  createCaptureSession,
+  initializeSession,
+  closeCaptureSession,
+  getCompositionDuration,
+} = (
+  await importPackagesOrBootstrap(["@hyperframes/producer"], {
+    npmPackages: [hyperframesPackageSpec("@hyperframes/producer")],
+  })
+)["@hyperframes/producer"];
+
+// ─── CLI ─────────────────────────────────────────────────────────────────────
+
+const args = parseArgs(process.argv.slice(2));
+if (!args.composition) die("missing <composition-dir>");
+
+const FRAMES = Number(args.frames ?? 6);
+const OUT_DIR = resolve(args.out ?? ".hyperframes/anim-map");
+const MIN_DUR = Number(args["min-duration"] ?? 0.15);
+const WIDTH = Number(args.width ?? 1920);
+const HEIGHT = Number(args.height ?? 1080);
+const FPS = Number(args.fps ?? 30);
+const COMP_DIR = resolve(args.composition);
+
+await mkdir(OUT_DIR, { recursive: true });
+
+// ─── Main ────────────────────────────────────────────────────────────────────
+
+const server = await createFileServer({ projectDir: COMP_DIR, port: 0 });
+const session = await createCaptureSession(
+  server.url,
+  OUT_DIR,
+  { width: WIDTH, height: HEIGHT, fps: FPS, format: "png" },
+  null,
+);
+await initializeSession(session);
+
+try {
+  const duration = await getCompositionDuration(session);
+  const tweens = await enumerateTweens(session);
+  const kept = tweens.filter((tw) => tw.end - tw.start >= MIN_DUR);
+
+  const report = {
+    composition: COMP_DIR,
+    duration,
+    totalTweens: tweens.length,
+    mappedTweens: kept.length,
+    skippedMicroTweens: tweens.length - kept.length,
+    tweens: [],
+  };
+
+  for (let i = 0; i < kept.length; i++) {
+    const tw = kept[i];
+    const times = Array.from(
+      { length: FRAMES },
+      (_, k) => +(tw.start + ((k + 0.5) / FRAMES) * (tw.end - tw.start)).toFixed(3),
+    );
+
+    const bboxes = [];
+    for (const t of times) {
+      await seekTo(session, t);
+      const bbox = await measureTarget(session, tw.selectorHint);
+      bboxes.push({ t, ...bbox });
+    }
+
+    const animProps = tw.props.filter(
+      (p) => !["parent", "overwrite", "immediateRender", "startAt", "runBackwards"].includes(p),
+    );
+    const flags = computeFlags(tw, bboxes, { width: WIDTH, height: HEIGHT });
+    const summary = describeTween(tw, animProps, bboxes, flags);
+
+    report.tweens.push({
+      index: i + 1,
+      selector: tw.selectorHint,
+      targets: tw.targetCount,
+      props: animProps,
+      start: +tw.start.toFixed(3),
+      end: +tw.end.toFixed(3),
+      duration: +(tw.end - tw.start).toFixed(3),
+      ease: tw.ease,
+      bboxes,
+      flags,
+      summary,
+    });
+  }
+
+  markCollisions(report.tweens);
+
+  for (const tw of report.tweens) {
+    if (tw.flags.includes("collision") && !tw.summary.includes("collision")) {
+      tw.summary += " Overlaps another animated element.";
+    }
+  }
+
+  // ── Composition-level analysis ──
+  report.choreography = buildTimeline(report.tweens, duration);
+  report.density = computeDensity(report.tweens, duration);
+  report.staggers = detectStaggers(report.tweens);
+  report.elements = buildElementLifecycles(report.tweens);
+  report.deadZones = findDeadZones(report.density, duration);
+  report.snapshots = await captureSnapshots(session, report.tweens, duration);
+
+  await writeFile(join(OUT_DIR, "animation-map.json"), JSON.stringify(report, null, 2));
+
+  printSummary(report);
+} finally {
+  await closeCaptureSession(session).catch(() => {});
+  server.close();
+}
+
+// ─── Seek helper ────────────────────────────────────────────────────────────
+
+async function seekTo(session, t) {
+  await session.page.evaluate((time) => {
+    if (window.__hf && typeof window.__hf.seek === "function") {
+      window.__hf.seek(time);
+      return;
+    }
+    const tls = window.__timelines;
+    if (tls) {
+      for (const tl of Object.values(tls)) {
+        if (typeof tl.seek === "function") tl.seek(time);
+      }
+    }
+  }, t);
+  await new Promise((r) => setTimeout(r, 100));
+}
+
+// ─── Timeline introspection ──────────────────────────────────────────────────
+
+async function enumerateTweens(session) {
+  return await session.page.evaluate(() => {
+    const results = [];
+    const registry = window.__timelines || {};
+
+    const selectorOf = (el) => {
+      if (!el || !(el instanceof Element)) return null;
+      if (el.id) return `#${el.id}`;
+      const cls = [...el.classList].slice(0, 2).join(".");
+      return cls ? `${el.tagName.toLowerCase()}.${cls}` : el.tagName.toLowerCase();
+    };
+
+    const walk = (node, parentOffset = 0) => {
+      if (!node) return;
+      if (typeof node.getChildren === "function") {
+        const offset = parentOffset + (node.startTime?.() ?? 0);
+        for (const child of node.getChildren(true, true, true)) {
+          walk(child, offset);
+        }
+        return;
+      }
+      const targets = (node.targets?.() ?? []).filter((t) => t instanceof Element);
+      if (!targets.length) return;
+      const vars = node.vars ?? {};
+      const props = Object.keys(vars).filter(
+        (k) =>
+          ![
+            "duration",
+            "ease",
+            "delay",
+            "repeat",
+            "yoyo",
+            "onStart",
+            "onUpdate",
+            "onComplete",
+            "stagger",
+          ].includes(k),
+      );
+      const start = parentOffset + (node.startTime?.() ?? 0);
+      const end = start + (node.duration?.() ?? 0);
+      results.push({
+        selectorHint: selectorOf(targets[0]) ?? "(unknown)",
+        targetCount: targets.length,
+        props,
+        start,
+        end,
+        ease: typeof vars.ease === "string" ? vars.ease : (vars.ease?.toString?.() ?? "none"),
+      });
+    };
+
+    for (const tl of Object.values(registry)) walk(tl, 0);
+    results.sort((a, b) => a.start - b.start);
+    return results;
+  });
+}
+
+async function measureTarget(session, selector) {
+  return await session.page.evaluate((sel) => {
+    const el = document.querySelector(sel);
+    if (!el) return { x: 0, y: 0, w: 0, h: 0, missing: true };
+    const r = el.getBoundingClientRect();
+    const cs = getComputedStyle(el);
+    return {
+      x: Math.round(r.x),
+      y: Math.round(r.y),
+      w: Math.round(r.width),
+      h: Math.round(r.height),
+      opacity: parseFloat(cs.opacity),
+      visible: cs.visibility !== "hidden" && cs.display !== "none",
+    };
+  }, selector);
+}
+
+// ─── Tween description (the key output for agents) ──────────────────────────
+
+function describeTween(tw, props, bboxes, flags) {
+  const dur = (tw.end - tw.start).toFixed(2);
+  const parts = [];
+
+  parts.push(`${tw.selectorHint} animates ${props.join("+")} over ${dur}s (${tw.ease})`);
+
+  // Movement
+  const first = bboxes[0];
+  const last = bboxes[bboxes.length - 1];
+  if (first && last) {
+    const dx = last.x - first.x;
+    const dy = last.y - first.y;
+    if (Math.abs(dx) > 3 || Math.abs(dy) > 3) {
+      const dirs = [];
+      if (Math.abs(dy) > 3) dirs.push(dy < 0 ? `${Math.abs(dy)}px up` : `${Math.abs(dy)}px down`);
+      if (Math.abs(dx) > 3)
+        dirs.push(dx < 0 ? `${Math.abs(dx)}px left` : `${Math.abs(dx)}px right`);
+      parts.push(`moves ${dirs.join(" and ")}`);
+    }
+  }
+
+  // Opacity
+  if (first && last && first.opacity !== undefined && last.opacity !== undefined) {
+    const o1 = first.opacity;
+    const o2 = last.opacity;
+    if (Math.abs(o2 - o1) > 0.1) {
+      if (o1 < 0.1 && o2 > 0.5) parts.push("fades in");
+      else if (o1 > 0.5 && o2 < 0.1) parts.push("fades out");
+      else parts.push(`opacity ${o1.toFixed(1)}→${o2.toFixed(1)}`);
+    }
+  }
+
+  // Scale (from props)
+  if (props.includes("scale") || props.includes("scaleX") || props.includes("scaleY")) {
+    parts.push("scales");
+  }
+
+  // Size changes
+  if (first && last) {
+    const dw = last.w - first.w;
+    const dh = last.h - first.h;
+    if (Math.abs(dw) > 5) parts.push(`width ${first.w}→${last.w}px`);
+    if (Math.abs(dh) > 5) parts.push(`height ${first.h}→${last.h}px`);
+  }
+
+  // Visibility
+  if (first && last && first.visible !== last.visible) {
+    parts.push(last.visible ? "becomes visible" : "becomes hidden");
+  }
+
+  // Final position
+  if (last && !last.missing) {
+    parts.push(`ends at (${last.x}, ${last.y}) ${last.w}×${last.h}px`);
+  }
+
+  // Flags
+  if (flags.length > 0) {
+    parts.push(`FLAGS: ${flags.join(", ")}`);
+  }
+
+  return parts.join(". ") + ".";
+}
+
+// ─── Flag computation ───────────────────────────────────────────────────────
+
+function computeFlags(tw, bboxes, { width, height }) {
+  const flags = [];
+  const dur = tw.end - tw.start;
+
+  if (bboxes.every((b) => b.w === 0 || b.h === 0)) flags.push("degenerate");
+
+  const anyOffscreen = bboxes.some(
+    (b) =>
+      b.x + b.w <= 0 ||
+      b.y + b.h <= 0 ||
+      b.x >= width ||
+      b.y >= height ||
+      b.x < -b.w * 0.5 ||
+      b.y < -b.h * 0.5 ||
+      b.x + b.w > width + b.w * 0.5 ||
+      b.y + b.h > height + b.h * 0.5,
+  );
+  if (anyOffscreen) flags.push("offscreen");
+
+  if (bboxes.every((b) => b.opacity !== undefined && b.opacity < 0.01 && b.visible)) {
+    flags.push("invisible");
+  }
+
+  if (dur < 0.2 && tw.props.some((p) => ["y", "x", "opacity", "scale"].includes(p))) {
+    flags.push("paced-fast");
+  }
+  if (dur > 2.0) flags.push("paced-slow");
+
+  return flags;
+}
+
+function markCollisions(tweens) {
+  for (let i = 0; i < tweens.length; i++) {
+    for (let j = i + 1; j < tweens.length; j++) {
+      const a = tweens[i];
+      const b = tweens[j];
+      if (a.end <= b.start || b.end <= a.start) continue;
+      for (const ba of a.bboxes) {
+        const bb = b.bboxes.find((x) => Math.abs(x.t - ba.t) < 0.05);
+        if (!bb) continue;
+        const overlap = rectOverlapArea(ba, bb);
+        const aArea = ba.w * ba.h;
+        if (aArea > 0 && overlap / aArea > 0.3) {
+          if (!a.flags.includes("collision")) a.flags.push("collision");
+          if (!b.flags.includes("collision")) b.flags.push("collision");
+          break;
+        }
+      }
+    }
+  }
+}
+
+function rectOverlapArea(a, b) {
+  const x1 = Math.max(a.x, b.x);
+  const y1 = Math.max(a.y, b.y);
+  const x2 = Math.min(a.x + a.w, b.x + b.w);
+  const y2 = Math.min(a.y + a.h, b.y + b.h);
+  return Math.max(0, x2 - x1) * Math.max(0, y2 - y1);
+}
+
+// ─── Composition-level analysis ─────────────────────────────────────────────
+
+function buildTimeline(tweens, duration) {
+  const cols = 60;
+  const lines = [];
+  const secPerCol = duration / cols;
+
+  lines.push("Timeline (" + duration.toFixed(1) + "s, each char ≈ " + secPerCol.toFixed(2) + "s):");
+  lines.push("  " + "0s" + " ".repeat(cols - 8) + duration.toFixed(0) + "s");
+  lines.push("  " + "┼" + "─".repeat(cols - 1) + "┤");
+
+  for (const tw of tweens) {
+    const startCol = Math.floor(tw.start / secPerCol);
+    const endCol = Math.min(cols, Math.ceil(tw.end / secPerCol));
+    const bar =
+      " ".repeat(startCol) +
+      "█".repeat(Math.max(1, endCol - startCol)) +
+      " ".repeat(Math.max(0, cols - endCol));
+    const label = tw.selector + " " + tw.props.join("+");
+    lines.push("  " + bar + "  " + label);
+  }
+
+  return lines.join("\n");
+}
+
+function computeDensity(tweens, duration) {
+  const buckets = [];
+  for (let t = 0; t < duration; t += 0.5) {
+    const active = tweens.filter((tw) => tw.start <= t + 0.5 && tw.end >= t);
+    buckets.push({ t: +t.toFixed(1), activeTweens: active.length });
+  }
+  return buckets;
+}
+
+function findDeadZones(density, duration) {
+  const zones = [];
+  let zoneStart = null;
+  for (const d of density) {
+    if (d.activeTweens === 0) {
+      if (zoneStart === null) zoneStart = d.t;
+    } else {
+      if (zoneStart !== null) {
+        const zoneEnd = d.t;
+        if (zoneEnd - zoneStart >= 1.0) {
+          zones.push({
+            start: zoneStart,
+            end: zoneEnd,
+            duration: +(zoneEnd - zoneStart).toFixed(1),
+            note:
+              "No animation for " +
+              (zoneEnd - zoneStart).toFixed(1) +
+              "s. Intentional hold or missing entrance?",
+          });
+        }
+        zoneStart = null;
+      }
+    }
+  }
+  if (zoneStart !== null && duration - zoneStart >= 1.0) {
+    zones.push({
+      start: zoneStart,
+      end: +duration.toFixed(1),
+      duration: +(duration - zoneStart).toFixed(1),
+      note:
+        "No animation for " +
+        (duration - zoneStart).toFixed(1) +
+        "s at end. Final hold or missing outro?",
+    });
+  }
+  return zones;
+}
+
+function detectStaggers(tweens) {
+  const groups = [];
+  const used = new Set();
+
+  for (let i = 0; i < tweens.length; i++) {
+    if (used.has(i)) continue;
+    const tw = tweens[i];
+    const group = [tw];
+    used.add(i);
+
+    for (let j = i + 1; j < tweens.length; j++) {
+      if (used.has(j)) continue;
+      const other = tweens[j];
+      const sameProps = tw.props.join(",") === other.props.join(",");
+      const sameDuration = Math.abs(tw.duration - other.duration) < 0.05;
+      const closeInTime = other.start - tw.start < tw.duration * 4;
+      if (sameProps && sameDuration && closeInTime) {
+        group.push(other);
+        used.add(j);
+      }
+    }
+
+    if (group.length >= 3) {
+      const intervals = [];
+      for (let k = 1; k < group.length; k++) {
+        intervals.push(+(group[k].start - group[k - 1].start).toFixed(3));
+      }
+      const avgInterval = intervals.reduce((a, b) => a + b, 0) / intervals.length;
+      const maxDrift = Math.max(...intervals.map((iv) => Math.abs(iv - avgInterval)));
+      const consistent = maxDrift < avgInterval * 0.3;
+
+      groups.push({
+        elements: group.map((g) => g.selector),
+        props: tw.props,
+        count: group.length,
+        intervals,
+        avgInterval: +avgInterval.toFixed(3),
+        consistent,
+        note: consistent
+          ? group.length +
+            " elements stagger at " +
+            (avgInterval * 1000).toFixed(0) +
+            "ms intervals"
+          : group.length +
+            " elements stagger with uneven intervals (" +
+            intervals.map((iv) => (iv * 1000).toFixed(0) + "ms").join(", ") +
+            ")",
+      });
+    }
+  }
+
+  return groups;
+}
+
+function buildElementLifecycles(tweens) {
+  const elements = {};
+  for (const tw of tweens) {
+    const sel = tw.selector;
+    if (!elements[sel]) {
+      elements[sel] = { firstTween: tw.start, lastTween: tw.end, tweenCount: 0, props: new Set() };
+    }
+    elements[sel].firstTween = Math.min(elements[sel].firstTween, tw.start);
+    elements[sel].lastTween = Math.max(elements[sel].lastTween, tw.end);
+    elements[sel].tweenCount++;
+    tw.props.forEach((p) => elements[sel].props.add(p));
+  }
+
+  const result = {};
+  for (const [sel, data] of Object.entries(elements)) {
+    const lastBbox = findLastBbox(tweens, sel);
+    result[sel] = {
+      firstAppears: +data.firstTween.toFixed(3),
+      lastAnimates: +data.lastTween.toFixed(3),
+      tweenCount: data.tweenCount,
+      props: [...data.props],
+      endsVisible: lastBbox ? lastBbox.opacity > 0.1 && lastBbox.visible : null,
+      finalPosition: lastBbox
+        ? { x: lastBbox.x, y: lastBbox.y, w: lastBbox.w, h: lastBbox.h }
+        : null,
+    };
+  }
+  return result;
+}
+
+function findLastBbox(tweens, selector) {
+  for (let i = tweens.length - 1; i >= 0; i--) {
+    if (tweens[i].selector === selector && tweens[i].bboxes?.length > 0) {
+      return tweens[i].bboxes[tweens[i].bboxes.length - 1];
+    }
+  }
+  return null;
+}
+
+async function captureSnapshots(session, tweens, duration) {
+  const times = [0, duration * 0.25, duration * 0.5, duration * 0.75, duration - 0.1];
+  const snapshots = [];
+
+  for (const t of times) {
+    await seekTo(session, t);
+    const visible = await session.page.evaluate(() => {
+      const out = [];
+      const els = document.querySelectorAll("[id]");
+      for (const el of els) {
+        const cs = getComputedStyle(el);
+        if (cs.display === "none") continue;
+        const opacity = parseFloat(cs.opacity);
+        if (opacity < 0.01) continue;
+        const rect = el.getBoundingClientRect();
+        if (rect.width < 1 || rect.height < 1) continue;
+        out.push({
+          id: el.id,
+          x: Math.round(rect.x),
+          y: Math.round(rect.y),
+          w: Math.round(rect.width),
+          h: Math.round(rect.height),
+          opacity: +opacity.toFixed(2),
+        });
+      }
+      return out;
+    });
+
+    const activeTweens = tweens
+      .filter((tw) => tw.start <= t && tw.end >= t)
+      .map((tw) => tw.selector);
+
+    snapshots.push({
+      t: +t.toFixed(2),
+      visibleElements: visible.length,
+      animatingNow: activeTweens,
+      elements: visible,
+    });
+  }
+
+  return snapshots;
+}
+
+// ─── Output ─────────────────────────────────────────────────────────────────
+
+function printSummary(report) {
+  console.log(
+    `\nAnimation map: ${report.mappedTweens}/${report.totalTweens} tweens (skipped ${report.skippedMicroTweens} micro-tweens)`,
+  );
+
+  const flagCounts = {};
+  for (const tw of report.tweens) {
+    for (const f of tw.flags) flagCounts[f] = (flagCounts[f] ?? 0) + 1;
+  }
+  if (Object.keys(flagCounts).length > 0) {
+    for (const [f, n] of Object.entries(flagCounts)) console.log(`  ${f}: ${n}`);
+  }
+  if (report.staggers?.length > 0) {
+    console.log(`  staggers: ${report.staggers.map((s) => s.note).join("; ")}`);
+  }
+  if (report.deadZones?.length > 0) {
+    console.log(
+      `  dead zones: ${report.deadZones.map((z) => z.start + "-" + z.end + "s").join(", ")}`,
+    );
+  }
+
+  console.log(report.choreography);
+}
+
+function parseArgs(argv) {
+  const out = {};
+  let positional = 0;
+  for (let i = 0; i < argv.length; i++) {
+    const a = argv[i];
+    if (a.startsWith("--")) {
+      const k = a.slice(2);
+      const v = argv[i + 1]?.startsWith("--") ? true : argv[++i];
+      out[k] = v;
+    } else if (positional === 0) {
+      out.composition = a;
+      positional++;
+    }
+  }
+  return out;
+}
+
+function die(msg) {
+  console.error(`animation-map: ${msg}`);
+  process.exit(2);
+}

skills/hyperframes/scripts/contrast-report.mjs

@@ -0,0 +1,338 @@
+#!/usr/bin/env node
+// contrast-report.mjs — HyperFrames contrast audit
+//
+// Reads a composition, seeks to N sample timestamps, walks the DOM for text
+// elements, measures the WCAG 2.1 contrast ratio between each element's
+// declared foreground color and the pixels behind it, and emits:
+//
+//   - contrast-report.json  (machine-readable, one entry per text element × sample)
+//   - contrast-overlay.png  (sprite grid; magenta=fail AA, yellow=pass AA only, green=AAA)
+//
+// Usage:
+//   node skills/hyperframes/scripts/contrast-report.mjs <composition-dir> \
+//     [--samples N] [--out <dir>] [--width W] [--height H] [--fps N]
+//
+// The composition directory must contain an index.html. Raw authoring HTML
+// works — the producer's file server auto-injects the runtime at serve time.
+// Exits 1 if any text element fails WCAG AA.
+
+import { mkdir, writeFile } from "node:fs/promises";
+import { resolve } from "node:path";
+import { hyperframesPackageSpec, importPackagesOrBootstrap } from "./package-loader.mjs";
+
+// Use the producer's file server — it auto-injects the HyperFrames runtime
+// and render-seek bridge, so raw authoring HTML works without a build step.
+const packages = await importPackagesOrBootstrap(["@hyperframes/producer", "sharp"], {
+  npmPackages: [hyperframesPackageSpec("@hyperframes/producer"), "sharp@0.34.5"],
+});
+const sharp = packages.sharp.default;
+const {
+  createFileServer,
+  createCaptureSession,
+  initializeSession,
+  closeCaptureSession,
+  captureFrameToBuffer,
+  getCompositionDuration,
+} = packages["@hyperframes/producer"];
+
+// ─── CLI ─────────────────────────────────────────────────────────────────────
+
+const args = parseArgs(process.argv.slice(2));
+if (!args.composition) die("missing <composition-dir>");
+
+const SAMPLES = Number(args.samples ?? 10);
+const OUT_DIR = resolve(args.out ?? ".hyperframes/contrast");
+const WIDTH = Number(args.width ?? 1920);
+const HEIGHT = Number(args.height ?? 1080);
+const FPS = Number(args.fps ?? 30);
+const COMP_DIR = resolve(args.composition);
+
+// ─── Main ────────────────────────────────────────────────────────────────────
+
+await mkdir(OUT_DIR, { recursive: true });
+
+const server = await createFileServer({ projectDir: COMP_DIR, port: 0 });
+const session = await createCaptureSession(
+  server.url,
+  OUT_DIR,
+  { width: WIDTH, height: HEIGHT, fps: FPS, format: "png" },
+  null,
+);
+await initializeSession(session);
+
+try {
+  const duration = await getCompositionDuration(session);
+  const times = Array.from(
+    { length: SAMPLES },
+    (_, i) => +(((i + 0.5) / SAMPLES) * duration).toFixed(3),
+  );
+
+  const allEntries = [];
+  const overlayFrames = [];
+
+  for (let i = 0; i < times.length; i++) {
+    const t = times[i];
+    const { buffer: pngBuf } = await captureFrameToBuffer(session, i, t);
+    const elements = await probeTextElements(session, t);
+    const annotated = await annotateFrame(pngBuf, elements);
+    overlayFrames.push({ t, png: annotated });
+    for (const el of elements) allEntries.push({ time: t, ...el });
+  }
+
+  const report = {
+    composition: COMP_DIR,
+    width: WIDTH,
+    height: HEIGHT,
+    duration,
+    samples: times,
+    entries: allEntries,
+    summary: summarize(allEntries),
+  };
+
+  await writeFile(resolve(OUT_DIR, "contrast-report.json"), JSON.stringify(report, null, 2));
+  await writeOverlaySprite(overlayFrames, resolve(OUT_DIR, "contrast-overlay.png"));
+
+  printSummary(report);
+  process.exitCode = report.summary.failAA > 0 ? 1 : 0;
+} finally {
+  await closeCaptureSession(session).catch(() => {});
+  server.close();
+}
+
+// ─── DOM probe (runs in the page) ────────────────────────────────────────────
+
+async function probeTextElements(session, _t) {
+  // `session.page` is the Puppeteer Page owned by the capture session.
+  // We pass a pure function to `evaluate`: it walks the DOM and returns
+  // enough info for us to compute a ratio in Node using the frame buffer.
+  return await session.page.evaluate(() => {
+    /** @type {Array<{selector: string, text: string, fg: [number,number,number,number], fontSize: number, fontWeight: number, bbox: {x:number,y:number,w:number,h:number}}>} */
+    const out = [];
+    const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_ELEMENT);
+    const parseColor = (c) => {
+      const m = c.match(/rgba?\(([^)]+)\)/);
+      if (!m) return [0, 0, 0, 1];
+      const parts = m[1].split(",").map((s) => parseFloat(s.trim()));
+      return [parts[0], parts[1], parts[2], parts[3] ?? 1];
+    };
+    const selectorOf = (el) => {
+      if (el.id) return `#${el.id}`;
+      const cls = [...el.classList].slice(0, 2).join(".");
+      return cls ? `${el.tagName.toLowerCase()}.${cls}` : el.tagName.toLowerCase();
+    };
+    let el;
+    while ((el = walker.nextNode())) {
+      // must have direct text
+      const direct = [...el.childNodes].some(
+        (n) => n.nodeType === 3 && n.textContent.trim().length,
+      );
+      if (!direct) continue;
+      const cs = getComputedStyle(el);
+      if (cs.visibility === "hidden" || cs.display === "none") continue;
+      if (parseFloat(cs.opacity) <= 0.01) continue;
+      const rect = el.getBoundingClientRect();
+      if (rect.width < 8 || rect.height < 8) continue;
+      out.push({
+        selector: selectorOf(el),
+        text: el.textContent.trim().slice(0, 60),
+        fg: parseColor(cs.color),
+        fontSize: parseFloat(cs.fontSize),
+        fontWeight: Number(cs.fontWeight) || 400,
+        bbox: { x: rect.x, y: rect.y, w: rect.width, h: rect.height },
+      });
+    }
+    return out;
+  });
+}
+
+// ─── Pixel sampling + WCAG math ──────────────────────────────────────────────
+
+async function annotateFrame(pngBuf, elements) {
+  const img = sharp(pngBuf);
+  const meta = await img.metadata();
+  const { width, height } = meta;
+  const raw = await img.ensureAlpha().raw().toBuffer();
+  const channels = 4;
+
+  const measured = [];
+  for (const el of elements) {
+    const bg = sampleRingMedian(raw, width, height, channels, el.bbox);
+    const fg = compositeOver(el.fg, bg); // flatten any alpha against measured bg
+    const ratio = wcagRatio(fg, bg);
+    const large = isLargeText(el.fontSize, el.fontWeight);
+    el.bg = bg;
+    el.ratio = +ratio.toFixed(2);
+    el.wcagAA = large ? ratio >= 3 : ratio >= 4.5;
+    el.wcagAALarge = ratio >= 3;
+    el.wcagAAA = large ? ratio >= 4.5 : ratio >= 7;
+    measured.push(el);
+  }
+
+  // Draw boxes + ratio labels as an SVG overlay (sharp composite).
+  const svg = buildOverlaySVG(measured, width, height);
+  return await sharp(pngBuf)
+    .composite([{ input: Buffer.from(svg), top: 0, left: 0 }])
+    .png()
+    .toBuffer();
+}
+
+function sampleRingMedian(raw, width, height, channels, bbox) {
+  // 4-px ring immediately outside the element bbox. Median of each channel.
+  const r = [],
+    g = [],
+    b = [];
+  const x0 = Math.max(0, Math.floor(bbox.x) - 4);
+  const x1 = Math.min(width - 1, Math.ceil(bbox.x + bbox.w) + 4);
+  const y0 = Math.max(0, Math.floor(bbox.y) - 4);
+  const y1 = Math.min(height - 1, Math.ceil(bbox.y + bbox.h) + 4);
+  const pushPixel = (x, y) => {
+    const i = (y * width + x) * channels;
+    r.push(raw[i]);
+    g.push(raw[i + 1]);
+    b.push(raw[i + 2]);
+  };
+  for (let x = x0; x <= x1; x++) {
+    pushPixel(x, y0);
+    pushPixel(x, y1);
+  }
+  for (let y = y0; y <= y1; y++) {
+    pushPixel(x0, y);
+    pushPixel(x1, y);
+  }
+  return [median(r), median(g), median(b), 1];
+}
+
+function median(arr) {
+  const s = [...arr].sort((a, b) => a - b);
+  return s[Math.floor(s.length / 2)];
+}
+
+function compositeOver([fr, fg, fb, fa], [br, bg, bb]) {
+  return [
+    Math.round(fr * fa + br * (1 - fa)),
+    Math.round(fg * fa + bg * (1 - fa)),
+    Math.round(fb * fa + bb * (1 - fa)),
+    1,
+  ];
+}
+
+function relLum([r, g, b]) {
+  const ch = (v) => {
+    const s = v / 255;
+    return s <= 0.03928 ? s / 12.92 : ((s + 0.055) / 1.055) ** 2.4;
+  };
+  return 0.2126 * ch(r) + 0.7152 * ch(g) + 0.0722 * ch(b);
+}
+
+function wcagRatio(a, b) {
+  const la = relLum(a);
+  const lb = relLum(b);
+  const [L1, L2] = la > lb ? [la, lb] : [lb, la];
+  return (L1 + 0.05) / (L2 + 0.05);
+}
+
+function isLargeText(fontSize, fontWeight) {
+  return fontSize >= 24 || (fontSize >= 19 && fontWeight >= 700);
+}
+
+// ─── Overlay rendering ───────────────────────────────────────────────────────
+
+function buildOverlaySVG(elements, w, h) {
+  const rects = elements
+    .map((el) => {
+      const color = !el.wcagAA ? "#ff00aa" : !el.wcagAAA ? "#ffcc00" : "#00e08a";
+      const { x, y, w: bw, h: bh } = el.bbox;
+      return `
+        <rect x="${x}" y="${y}" width="${bw}" height="${bh}"
+              fill="none" stroke="${color}" stroke-width="3"/>
+        <rect x="${x}" y="${y - 18}" width="${48}" height="16" fill="${color}"/>
+        <text x="${x + 4}" y="${y - 5}" font-family="monospace" font-size="12" fill="#000">
+          ${el.ratio.toFixed(1)}:1
+        </text>`;
+    })
+    .join("");
+  return `<svg xmlns="http://www.w3.org/2000/svg" width="${w}" height="${h}">${rects}</svg>`;
+}
+
+async function writeOverlaySprite(frames, outPath) {
+  if (!frames.length) return;
+  const cols = Math.min(frames.length, 5);
+  const rows = Math.ceil(frames.length / cols);
+  const { width, height } = await sharp(frames[0].png).metadata();
+  const scale = 0.25;
+  const cellW = Math.round(width * scale);
+  const cellH = Math.round(height * scale);
+
+  const cells = await Promise.all(
+    frames.map(async (f) => ({
+      input: await sharp(f.png).resize(cellW, cellH).png().toBuffer(),
+      time: f.t,
+    })),
+  );
+
+  const composites = cells.map((c, i) => ({
+    input: c.input,
+    top: Math.floor(i / cols) * cellH,
+    left: (i % cols) * cellW,
+  }));
+
+  await sharp({
+    create: {
+      width: cols * cellW,
+      height: rows * cellH,
+      channels: 3,
+      background: { r: 16, g: 16, b: 20 },
+    },
+  })
+    .composite(composites)
+    .png()
+    .toFile(outPath);
+}
+
+// ─── Summary ────────────────────────────────────────────────────────────────
+
+function summarize(entries) {
+  const total = entries.length;
+  const failAA = entries.filter((e) => !e.wcagAA).length;
+  const passAAonly = entries.filter((e) => e.wcagAA && !e.wcagAAA).length;
+  const passAAA = entries.filter((e) => e.wcagAAA).length;
+  return { total, failAA, passAAonly, passAAA };
+}
+
+function printSummary({ summary, entries }) {
+  const { total, failAA, passAAonly, passAAA } = summary;
+  console.log(`\nContrast report: ${total} text-element samples`);
+  console.log(`  fail WCAG AA:     ${failAA}`);
+  console.log(`  pass AA, not AAA: ${passAAonly}`);
+  console.log(`  pass AAA:         ${passAAA}`);
+  if (failAA) {
+    console.log("\nFailures:");
+    for (const e of entries.filter((x) => !x.wcagAA)) {
+      console.log(`  t=${e.time}s  ${e.selector.padEnd(24)}  ${e.ratio.toFixed(2)}:1  "${e.text}"`);
+    }
+  }
+}
+
+// ─── Utilities ──────────────────────────────────────────────────────────────
+
+function parseArgs(argv) {
+  const out = {};
+  let positional = 0;
+  for (let i = 0; i < argv.length; i++) {
+    const a = argv[i];
+    if (a.startsWith("--")) {
+      const k = a.slice(2);
+      const v = argv[i + 1]?.startsWith("--") ? true : argv[++i];
+      out[k] = v;
+    } else if (positional === 0) {
+      out.composition = a;
+      positional++;
+    }
+  }
+  return out;
+}
+
+function die(msg) {
+  console.error(`contrast-report: ${msg}`);
+  process.exit(2);
+}

skills/hyperframes/scripts/package-loader.mjs

@@ -0,0 +1,269 @@
+import { spawnSync } from "node:child_process";
+import { existsSync, mkdtempSync, readFileSync, rmSync } from "node:fs";
+import { createRequire } from "node:module";
+import { tmpdir } from "node:os";
+import { basename, delimiter, dirname, join, parse, resolve } from "node:path";
+import { createInterface } from "node:readline/promises";
+import { fileURLToPath, pathToFileURL } from "node:url";
+
+const HERE = dirname(fileURLToPath(import.meta.url));
+const BOOTSTRAP_ENV = "HYPERFRAMES_SKILL_DEPS_BOOTSTRAPPED";
+const BOOTSTRAP_CONFIRM_ENV = "HYPERFRAMES_SKILL_BOOTSTRAP_DEPS";
+const NODE_MODULES_ENV = "HYPERFRAMES_SKILL_NODE_MODULES";
+
+export async function importPackagesOrBootstrap(packageNames, options = {}) {
+  const entries = new Map();
+  const missing = [];
+
+  for (const packageName of packageNames) {
+    const entry = resolvePackageEntry(packageName);
+    if (entry) entries.set(packageName, entry);
+    else missing.push(packageName);
+  }
+
+  if (missing.length > 0 && !process.env[BOOTSTRAP_ENV]) {
+    const npmPackages = options.npmPackages ?? missing;
+    assertPinnedPackageSpecs(npmPackages);
+    await confirmBootstrap(npmPackages);
+    bootstrapWithNpmInstall(npmPackages);
+  }
+
+  if (missing.length > 0) {
+    throw new Error(
+      [
+        `Could not resolve required package(s): ${missing.join(", ")}`,
+        "Install them in this project, for example:",
+        `  npm install --save-dev ${packageNames.map(shellQuote).join(" ")}`,
+      ].join("\n"),
+    );
+  }
+
+  const modules = {};
+  for (const [packageName, entry] of entries) {
+    modules[packageName] = await import(pathToFileURL(entry).href);
+  }
+  return modules;
+}
+
+export function hyperframesPackageSpec(packageName) {
+  const version = readBundledHyperframesVersion();
+  if (!version) {
+    throw new Error(
+      [
+        `Could not determine the bundled HyperFrames version for ${packageName}.`,
+        "Install the package yourself or pass a pinned options.npmPackages entry.",
+      ].join("\n"),
+    );
+  }
+  return `${packageName}@${version}`;
+}
+
+function resolvePackageEntry(packageName) {
+  const bases = [process.cwd(), HERE, ...envNodeModulesDirs(), ...nodeModulesDirsFromPath()];
+
+  const seen = new Set();
+  for (const base of bases) {
+    const normalized = resolve(base);
+    if (seen.has(normalized)) continue;
+    seen.add(normalized);
+
+    try {
+      return createRequire(join(normalized, "__hyperframes_skill_loader__.cjs")).resolve(
+        packageName,
+      );
+    } catch {
+      const packageDir = findPackageDir(normalized, packageName);
+      const packageEntry = packageDir ? readPackageEntry(packageDir) : null;
+      if (packageEntry) return packageEntry;
+    }
+  }
+
+  return null;
+}
+
+function readBundledHyperframesVersion() {
+  for (const ancestor of ancestors(HERE)) {
+    const directVersion = readPackageVersion(join(ancestor, "package.json"));
+    if (directVersion) return directVersion;
+
+    const monorepoCliVersion = readPackageVersion(
+      join(ancestor, "packages", "cli", "package.json"),
+    );
+    if (monorepoCliVersion) return monorepoCliVersion;
+  }
+  return null;
+}
+
+function readPackageVersion(packageJsonPath) {
+  try {
+    const manifest = JSON.parse(readFileSync(packageJsonPath, "utf8"));
+    if (manifest.name === "hyperframes" || manifest.name === "@hyperframes/cli") {
+      return typeof manifest.version === "string" ? manifest.version : null;
+    }
+  } catch {
+    // Keep searching ancestor package manifests.
+  }
+  return null;
+}
+
+function envNodeModulesDirs() {
+  return (process.env[NODE_MODULES_ENV] ?? "").split(delimiter).filter(Boolean);
+}
+
+function nodeModulesDirsFromPath() {
+  const dirs = [];
+  for (const entry of (process.env.PATH ?? "").split(delimiter)) {
+    if (!entry.endsWith(`${join("node_modules", ".bin")}`)) continue;
+    dirs.push(dirname(entry));
+  }
+  return dirs;
+}
+
+function findPackageDir(base, packageName) {
+  const packageSegments = packageName.split("/");
+  const roots =
+    basename(base) === "node_modules"
+      ? [base]
+      : ancestors(base).map((ancestor) => join(ancestor, "node_modules"));
+
+  for (const root of roots) {
+    const packageDir = join(root, ...packageSegments);
+    if (existsSync(join(packageDir, "package.json"))) return packageDir;
+  }
+  return null;
+}
+
+function readPackageEntry(packageDir) {
+  try {
+    const manifest = JSON.parse(readFileSync(join(packageDir, "package.json"), "utf8"));
+    const entry = exportEntry(manifest.exports) ?? manifest.module ?? manifest.main ?? "index.js";
+    const entryPath = join(packageDir, entry);
+    return existsSync(entryPath) ? entryPath : null;
+  } catch {
+    return null;
+  }
+}
+
+function exportEntry(exports) {
+  const root =
+    typeof exports === "object" && exports !== null ? (exports["."] ?? exports) : exports;
+  if (typeof root === "string") return root;
+  if (typeof root !== "object" || root === null) return null;
+  if (typeof root.import === "string") return root.import;
+  if (typeof root.default === "string") return root.default;
+  if (typeof root.node === "string") return root.node;
+  if (typeof root.node === "object" && root.node !== null) {
+    return root.node.import ?? root.node.default ?? null;
+  }
+  return null;
+}
+
+function assertPinnedPackageSpecs(packageSpecs) {
+  const unpinned = packageSpecs.filter((spec) => !hasVersionSpec(spec));
+  if (unpinned.length === 0) return;
+  throw new Error(
+    [
+      `Refusing to bootstrap unpinned package spec(s): ${unpinned.join(", ")}`,
+      "Pass pinned npm package specs, for example:",
+      `  ${packageSpecs.map((spec) => (hasVersionSpec(spec) ? spec : `${spec}@<version>`)).join(" ")}`,
+    ].join("\n"),
+  );
+}
+
+function hasVersionSpec(packageSpec) {
+  if (packageSpec.startsWith("@")) {
+    const slash = packageSpec.indexOf("/");
+    return slash !== -1 && packageSpec.indexOf("@", slash + 1) !== -1;
+  }
+  return packageSpec.includes("@");
+}
+
+async function confirmBootstrap(packageSpecs) {
+  if (process.env[BOOTSTRAP_CONFIRM_ENV] === "1") return;
+
+  const installLine = `npm install --ignore-scripts --no-save ${packageSpecs.map(shellQuote).join(" ")}`;
+  if (!process.stdin.isTTY) {
+    throw new Error(
+      [
+        "Required helper package(s) are missing.",
+        "To allow a one-time temporary dependency bootstrap for this run, set:",
+        `  ${BOOTSTRAP_CONFIRM_ENV}=1`,
+        "The bootstrap command will be:",
+        `  ${installLine}`,
+      ].join("\n"),
+    );
+  }
+
+  const rl = createInterface({ input: process.stdin, output: process.stderr });
+  try {
+    const answer = await rl.question(
+      [
+        "HyperFrames helper package(s) are missing.",
+        `Run a temporary install with lifecycle scripts disabled?`,
+        `  ${installLine}`,
+        "Proceed? [y/N] ",
+      ].join("\n"),
+    );
+    if (!/^(y|yes)$/i.test(answer.trim())) {
+      throw new Error("Dependency bootstrap cancelled.");
+    }
+  } finally {
+    rl.close();
+  }
+}
+
+function ancestors(start) {
+  const dirs = [];
+  let current = resolve(start);
+  const root = parse(current).root;
+  while (current && current !== root) {
+    dirs.push(current);
+    current = dirname(current);
+  }
+  dirs.push(root);
+  return dirs;
+}
+
+function bootstrapWithNpmInstall(packageNames) {
+  const installRoot = mkdtempSync(join(tmpdir(), "hyperframes-skill-deps-"));
+  const installResult = spawnSync(
+    process.platform === "win32" ? "npm.cmd" : "npm",
+    [
+      "install",
+      "--silent",
+      "--no-audit",
+      "--no-fund",
+      "--ignore-scripts",
+      "--no-save",
+      "--prefix",
+      installRoot,
+      ...packageNames,
+    ],
+    { stdio: "inherit" },
+  );
+
+  if (installResult.error) throw installResult.error;
+  if (installResult.status !== 0) {
+    rmSync(installRoot, { recursive: true, force: true });
+    process.exit(installResult.status ?? 1);
+  }
+
+  const args = [...process.argv.slice(1)];
+  const result = spawnSync(process.execPath, args, {
+    stdio: "inherit",
+    env: {
+      ...process.env,
+      [BOOTSTRAP_ENV]: "1",
+      [NODE_MODULES_ENV]: join(installRoot, "node_modules"),
+    },
+  });
+
+  rmSync(installRoot, { recursive: true, force: true });
+  if (result.error) throw result.error;
+  process.exit(result.status ?? 1);
+}
+
+function shellQuote(value) {
+  if (/^[A-Za-z0-9_./:@=-]+$/.test(value)) return value;
+  return `'${value.replace(/'/g, "'\\''")}'`;
+}