feat(cli): motion command — surface GSAP motion + 3D onion-skin --shot

packages/cli/src/cli.ts

@@ -121,6 +121,7 @@ const commandLoaders = {
   lint: () => import("./commands/lint.js").then((m) => m.default),
   beats: () => import("./commands/beats.js").then((m) => m.default),
   inspect: () => import("./commands/inspect.js").then((m) => m.default),
+  motion: () => import("./commands/motion.js").then((m) => m.default),
   layout: () => import("./commands/layout.js").then((m) => m.default),
   info: () => import("./commands/info.js").then((m) => m.default),
   compositions: () => import("./commands/compositions.js").then((m) => m.default),

packages/cli/src/commands/info.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it } from "vitest";
+import { orientation, durationFromHtml } from "./info.js";
+
+describe("orientation", () => {
+  it("is landscape when width > height", () => {
+    expect(orientation(1920, 1080)).toBe("landscape");
+  });
+
+  it("is portrait when height > width", () => {
+    expect(orientation(1080, 1920)).toBe("portrait");
+  });
+
+  it("is square when width === height", () => {
+    expect(orientation(1080, 1080)).toBe("square");
+  });
+});
+
+describe("durationFromHtml", () => {
+  it("reads data-duration from the root composition element", () => {
+    const html = `<div data-composition-id="comp" data-width="1920" data-height="1080" data-start="0" data-duration="6"></div>`;
+    expect(durationFromHtml(html, 5)).toBe(6);
+  });
+
+  it("reads data-duration regardless of attribute order", () => {
+    const html = `<div data-duration="8" data-composition-id="comp"></div>`;
+    expect(durationFromHtml(html, 5)).toBe(8);
+  });
+
+  it("falls back to the computed timeline duration when no data-duration", () => {
+    const html = `<div data-composition-id="comp"></div>`;
+    expect(durationFromHtml(html, 5)).toBe(5);
+  });
+});

packages/cli/src/commands/info.ts

@@ -14,6 +14,25 @@ import { ensureDOMParser } from "../utils/dom.js";
 import { resolveProject } from "../utils/project.js";
 import { withMeta } from "../utils/updateCheck.js";
 
+/** Derive orientation label from actual pixel dimensions. */
+export function orientation(width: number, height: number): "landscape" | "portrait" | "square" {
+  if (width > height) return "landscape";
+  if (height > width) return "portrait";
+  return "square";
+}
+
+/**
+ * Duration of the composition: prefer the root element's data-duration,
+ * fall back to the computed timeline end.
+ */
+export function durationFromHtml(html: string, fallback: number): number {
+  const match =
+    html.match(/data-composition-id[^>]*data-duration=["']([\d.]+)["']/) ||
+    html.match(/data-duration=["']([\d.]+)["'][^>]*data-composition-id/);
+  const value = match?.[1] ? parseFloat(match[1]) : NaN;
+  return Number.isFinite(value) ? value : fallback;
+}
+
 function totalSize(dir: string): number {
   let total = 0;
   for (const entry of readdirSync(dir, { withFileTypes: true })) {
@@ -56,6 +75,7 @@ export default defineCommand({
     const width = widthMatch?.[1] ? parseInt(widthMatch[1], 10) : fallback.width;
     const height = heightMatch?.[1] ? parseInt(heightMatch[1], 10) : fallback.height;
     const resolution = `${width}x${height}`;
+    const duration = durationFromHtml(html, maxEnd);
     const size = totalSize(project.dir);
 
     const typeCounts: Record<string, number> = {};
@@ -71,10 +91,10 @@ export default defineCommand({
         JSON.stringify(
           withMeta({
             name: project.name,
-            resolution: parsed.resolution,
+            resolution: orientation(width, height),
             width,
             height,
-            duration: maxEnd,
+            duration,
             elements: parsed.elements.length,
             tracks: tracks.size,
             types: typeCounts,
@@ -89,7 +109,7 @@ export default defineCommand({
 
     console.log(`${c.success("◇")}  ${c.accent(project.name)}`);
     console.log(label("Resolution", resolution));
-    console.log(label("Duration", `${maxEnd.toFixed(1)}s`));
+    console.log(label("Duration", `${duration.toFixed(1)}s`));
     console.log(label("Elements", `${parsed.elements.length}${typeStr ? ` (${typeStr})` : ""}`));
     console.log(label("Tracks", `${tracks.size}`));
     console.log(label("Size", formatBytes(size)));

packages/cli/src/commands/layout-audit.browser.js

@@ -310,6 +310,17 @@
     };
   }
 
+  // An ancestor (up to and including `stopAt`) that clips its overflow makes any
+  // text spilling past it invisible — that clipping IS the layout mechanism
+  // (odometer/ticker reels, masked windows), not a defect to report.
+  function clippedByAncestor(element, stopAt) {
+    for (let current = element; current; current = current.parentElement) {
+      if (current !== element && clipsOverflow(getComputedStyle(current))) return true;
+      if (current === stopAt) break;
+    }
+    return false;
+  }
+
   function textOverflowIssues(element, root, rootRect, time, tolerance) {
     const textRect = textRectFor(element);
     if (!textRect) return [];
@@ -320,7 +331,11 @@
     const container = nearestConstraint(element, root, rootRect);
     const containerRect = container === root ? rootRect : toRect(container.getBoundingClientRect());
     const containerOverflow = overflowFor(textRect, containerRect, tolerance);
-    if (containerOverflow && !hasAllowOverflowFlag(element)) {
+    if (
+      containerOverflow &&
+      !hasAllowOverflowFlag(element) &&
+      !clippedByAncestor(element, container)
+    ) {
       const style = getComputedStyle(element);
       issues.push({
         code: "text_box_overflow",
@@ -520,12 +535,29 @@
     return !!hit && hit !== element && !element.contains(hit) && !hit.contains(element);
   }
 
+  // The nearest ancestor establishing a 3D rendering context, or null. Elements
+  // sharing one are depth-sorted in 3D, so a "covering" hit is legitimate
+  // perspective (e.g. the back face of a preserve-3d cube), not a 2D overlap.
+  function preserve3dContext(element) {
+    for (let current = element; current; current = current.parentElement) {
+      const ts = getComputedStyle(current).transformStyle;
+      if (ts === "preserve-3d") return current;
+    }
+    return null;
+  }
+
+  function sharedPreserve3d(a, b) {
+    const ctx = preserve3dContext(a);
+    return !!ctx && ctx === preserve3dContext(b);
+  }
+
   // The opaque element painted over (x, y), or null when the topmost element
-  // there is related to the text or non-opaque.
+  // there is related to the text, non-opaque, or sharing a 3D context with it.
   function occluderAt(element, x, y) {
     if (typeof document.elementFromPoint !== "function") return null;
     const hit = document.elementFromPoint(x, y);
     if (!isForeignElement(element, hit)) return null;
+    if (sharedPreserve3d(element, hit)) return null;
     return isOpaqueOccluder(hit) ? hit : null;
   }
 

packages/cli/src/commands/motion.test.ts

@@ -0,0 +1,78 @@
+import { beforeAll, describe, expect, it } from "vitest";
+import { ensureDOMParser } from "../utils/dom.js";
+import { surfaceComposition } from "./motion.js";
+
+beforeAll(() => ensureDOMParser());
+
+const wrap = (script: string) =>
+  `<!doctype html><html><body><div id="root" data-composition-id="main" data-duration="4"><div id="dot" class="clip"></div></div><script>${script}</script></body></html>`;
+
+describe("motion multi-stroke traces", () => {
+  it("composites ≥2 position strokes on one element into a single trace", () => {
+    const html = wrap(`
+      const tl = gsap.timeline({ paused: true });
+      tl.to("#dot", { keyframes: { "0%": { x: -100, y: -150 }, "100%": { x: 80, y: -120 } }, duration: 1 });
+      tl.to("#dot", { keyframes: { "0%": { x: 80, y: 120 }, "100%": { x: 85, y: 140 } }, duration: 1 });
+      window.__timelines = [tl];
+    `);
+    const { traces } = surfaceComposition(html, "index.html", "index.html");
+    expect(traces).toHaveLength(1);
+    expect(traces[0]!.target).toBe("#dot");
+    expect(traces[0]!.strokes).toHaveLength(2);
+  });
+
+  it("treats a 0-duration set() between strokes as a pen-up jump, not a drawn stroke", () => {
+    const html = wrap(`
+      const tl = gsap.timeline({ paused: true });
+      tl.to("#dot", { keyframes: { "0%": { x: 0, y: 0 }, "100%": { x: 100, y: 0 } }, duration: 1 });
+      tl.set("#dot", { x: 200, y: 200 });
+      tl.to("#dot", { keyframes: { "0%": { x: 200, y: 200 }, "100%": { x: 250, y: 250 } }, duration: 1 });
+      window.__timelines = [tl];
+    `);
+    const { traces } = surfaceComposition(html, "index.html", "index.html");
+    expect(traces).toHaveLength(1);
+    // two DRAWN strokes; the set() is the pen-up gap and is excluded
+    expect(traces[0]!.strokes).toHaveLength(2);
+  });
+
+  it("leaves a single-stroke element untraced (normal per-tween output)", () => {
+    const html = wrap(`
+      const tl = gsap.timeline({ paused: true });
+      tl.to("#dot", { keyframes: { "0%": { x: 0, y: 0 }, "50%": { x: 200, y: -100 }, "100%": { x: 0, y: 0 } }, duration: 3 });
+      window.__timelines = [tl];
+    `);
+    const { traces, tweens } = surfaceComposition(html, "index.html", "index.html");
+    expect(traces).toHaveLength(0);
+    expect(tweens.length).toBeGreaterThan(0);
+  });
+});
+
+describe("motion composed-ancestor surfacing (nested elements)", () => {
+  const nested = (script: string) =>
+    `<!doctype html><html><body><div id="root" data-composition-id="main" data-duration="4"><div id="stage"><div id="hero"><div id="core" class="clip"></div></div></div></div><script>${script}</script></body></html>`;
+
+  it("annotates a child tween with its animated ANCESTOR's motion", () => {
+    const html = nested(`
+      const tl = gsap.timeline({ paused: true });
+      tl.to("#hero", { keyframes: { "0%": { x: -300, y: 0 }, "100%": { x: 300, y: 0 } }, duration: 4 }, 0);
+      tl.to("#core", { keyframes: { "0%": { scale: 1 }, "100%": { scale: 1.5 } }, duration: 4 }, 0);
+      window.__timelines = [tl];
+    `);
+    const { tweens } = surfaceComposition(html, "index.html", "index.html");
+    const core = tweens.find((t) => t.target === "#core");
+    expect(core?.composedWith?.map((a) => a.selector)).toContain("#hero");
+    // and the ancestor's path EXTENT is summarised (range, not endpoints — so a
+    // closed loop still reveals its travel)
+    expect(core?.composedWith?.[0]!.summary).toMatch(/x -300\.\.300/);
+  });
+
+  it("does not annotate when the parent isn't animated", () => {
+    const html = nested(`
+      const tl = gsap.timeline({ paused: true });
+      tl.to("#core", { keyframes: { "0%": { scale: 1 }, "100%": { scale: 1.5 } }, duration: 4 }, 0);
+      window.__timelines = [tl];
+    `);
+    const { tweens } = surfaceComposition(html, "index.html", "index.html");
+    expect(tweens.find((t) => t.target === "#core")?.composedWith).toBeUndefined();
+  });
+});