Merge pull request #19 from ion-design/queue-parallelism

Parallelize the clone queue: in-flight dedup + WORKER_CONCURRENCY

compiler/data/pattern-catalog.json

@@ -0,0 +1,55 @@
+{
+  "version": 1,
+  "description": "Frozen pattern catalog: signature-indexed widget/platform/animation detectors. Matched against IR srcClass/tag/attrs (frozen capture evidence) by src/knowledge/patternIndex.ts. Deterministic: same catalog + same IR => same hints. Regenerate the lock after edits: node --import tsx src/knowledge/patternIndex.ts --write-lock",
+  "patterns": [
+    { "id": "carousel_slick", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["slick-slider", "slick-track", "slick-slide", "slick-dots", "slick-list"] } },
+    { "id": "carousel_swiper", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["swiper", "swiper-wrapper", "swiper-slide", "swiper-container", "swiper-pagination"] } },
+    { "id": "carousel_splide", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["splide", "splide__track", "splide__slide", "splide__list"] } },
+    { "id": "carousel_owl", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["owl-carousel", "owl-stage", "owl-item"] } },
+    { "id": "carousel_flickity", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["flickity-enabled", "flickity-viewport", "flickity-slider"] } },
+    { "id": "carousel_glide", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["glide", "glide__track", "glide__slides", "glide__slide"] } },
+    { "id": "carousel_embla", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["embla", "embla__container", "embla__slide"] } },
+    { "id": "carousel_keen", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["keen-slider", "keen-slider__slide"] } },
+    { "id": "carousel_tiny", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["tns-outer", "tns-inner", "tns-slider", "tns-item"] } },
+    { "id": "carousel_bootstrap", "kind": "carousel", "flags": ["deferred_interactive", "gallery"], "match": { "classTokens": ["carousel-inner", "carousel-item", "carousel-indicators"] } },
+    { "id": "marquee_rfm", "kind": "marquee", "flags": ["deferred_interactive"], "match": { "classPrefixes": ["rfm-"] } },
+    { "id": "marquee_generic", "kind": "marquee", "flags": ["deferred_interactive"], "match": { "classTokens": ["marquee", "ticker", "scroller"], "tags": ["marquee"] } },
+    { "id": "counter_odometer", "kind": "counter", "flags": ["counter", "deferred_interactive"], "match": { "classTokens": ["odometer", "odometer-inside", "odometer-digit"] } },
+    { "id": "counter_countup", "kind": "counter", "flags": ["counter", "deferred_interactive"], "match": { "classTokens": ["countup", "counter-up", "purecounter"] } },
+    { "id": "typed_text", "kind": "text_effect", "flags": ["deferred_interactive"], "match": { "classTokens": ["typed-cursor", "typewrite", "typewriter"] } },
+    { "id": "anim_aos", "kind": "scroll_animation", "flags": ["motion_lib"], "match": { "classTokens": ["aos-init", "aos-animate"], "attrNames": ["data-aos"] } },
+    { "id": "anim_wow", "kind": "scroll_animation", "flags": ["motion_lib"], "match": { "classTokens": ["wow"], "attrNames": ["data-wow-delay", "data-wow-duration"] } },
+    { "id": "anim_animate_css", "kind": "css_animation", "flags": ["motion_lib"], "match": { "classPrefixes": ["animate__"], "classTokens": ["animated"] } },
+    { "id": "anim_locomotive", "kind": "scroll_animation", "flags": ["motion_lib"], "match": { "attrNames": ["data-scroll", "data-scroll-container", "data-scroll-section"] } },
+    { "id": "anim_rellax", "kind": "parallax", "flags": ["motion_lib"], "match": { "classTokens": ["rellax"], "attrNames": ["data-rellax-speed"] } },
+    { "id": "anim_gsap_scrolltrigger", "kind": "scroll_animation", "flags": ["motion_lib"], "match": { "classPrefixes": ["gsap-"], "attrNames": ["data-gsap"] } },
+    { "id": "anim_sal", "kind": "scroll_animation", "flags": ["motion_lib"], "match": { "attrNames": ["data-sal", "data-sal-delay"] } },
+    { "id": "lottie_widget", "kind": "lottie", "flags": ["deferred_interactive", "motion_lib"], "match": { "classTokens": ["lottie", "lottie-animation"], "tags": ["lottie-player", "dotlottie-player"], "attrNames": ["data-lottie", "data-animation-path"] } },
+    { "id": "particles_bg", "kind": "background_effect", "flags": ["deferred_interactive"], "match": { "classTokens": ["particles-js", "tsparticles"], "idPrefixes": ["particles-js"] } },
+    { "id": "video_player_lib", "kind": "video_player", "flags": ["deferred_interactive"], "match": { "classTokens": ["video-js", "plyr", "jwplayer", "vjs-tech"] } },
+    { "id": "lightbox_gallery", "kind": "lightbox", "flags": ["deferred_interactive", "gallery"], "match": { "classPrefixes": ["lg-", "pswp"], "classTokens": ["fancybox", "glightbox", "lightbox"] } },
+    { "id": "platform_elementor", "kind": "platform", "flags": ["platform_elementor"], "match": { "classPrefixes": ["elementor-"], "classTokens": ["elementor"] } },
+    { "id": "platform_wp_blocks", "kind": "platform", "flags": ["platform_wordpress"], "match": { "classPrefixes": ["wp-block-", "wp-container-"] } },
+    { "id": "platform_wpbakery", "kind": "platform", "flags": ["platform_wordpress"], "match": { "classPrefixes": ["vc_"], "classTokens": ["wpb_wrapper", "wpb_row"] } },
+    { "id": "platform_divi", "kind": "platform", "flags": ["platform_wordpress"], "match": { "classPrefixes": ["et_pb_"] } },
+    { "id": "platform_webflow", "kind": "platform", "flags": ["platform_webflow"], "match": { "classTokens": ["w-nav", "w-slider", "w-dropdown", "w-container", "w-richtext"], "attrNames": ["data-wf-page", "data-wf-site"] } },
+    { "id": "platform_shopify", "kind": "platform", "flags": ["platform_shopify"], "match": { "classTokens": ["shopify-section"], "idPrefixes": ["shopify-section"] } },
+    { "id": "platform_squarespace", "kind": "platform", "flags": ["platform_squarespace"], "match": { "classPrefixes": ["sqs-"], "attrNames": ["data-block-type"] } },
+    { "id": "platform_framer", "kind": "platform", "flags": ["platform_framer"], "match": { "classPrefixes": ["framer-"], "attrNames": ["data-framer-name"] } },
+    { "id": "platform_woocommerce", "kind": "platform", "flags": ["platform_wordpress", "ecommerce"], "match": { "classTokens": ["woocommerce", "woocommerce-page"] } },
+    { "id": "nav_hamburger", "kind": "nav_toggle", "flags": ["nav_toggle"], "match": { "classTokens": ["hamburger", "navbar-toggler", "menu-toggle", "nav-toggle", "burger", "menu-btn"] } },
+    { "id": "nav_mega_menu", "kind": "nav_menu", "flags": ["nav_toggle"], "match": { "classTokens": ["mega-menu", "megamenu", "dropdown-menu", "sub-menu"] } },
+    { "id": "consent_onetrust", "kind": "consent", "flags": ["consent_overlay", "third_party_widget"], "match": { "classPrefixes": ["ot-sdk-", "onetrust-"], "idPrefixes": ["onetrust-"] } },
+    { "id": "consent_cookiebot", "kind": "consent", "flags": ["consent_overlay", "third_party_widget"], "match": { "idPrefixes": ["CybotCookiebot"] } },
+    { "id": "consent_osano", "kind": "consent", "flags": ["consent_overlay", "third_party_widget"], "match": { "classPrefixes": ["osano-"] } },
+    { "id": "consent_cookieyes", "kind": "consent", "flags": ["consent_overlay", "third_party_widget"], "match": { "classPrefixes": ["cky-"] } },
+    { "id": "consent_complianz", "kind": "consent", "flags": ["consent_overlay", "third_party_widget"], "match": { "classPrefixes": ["cmplz-"] } },
+    { "id": "chat_intercom", "kind": "chat_widget", "flags": ["third_party_widget"], "match": { "classPrefixes": ["intercom-"], "idPrefixes": ["intercom-"] } },
+    { "id": "chat_crisp", "kind": "chat_widget", "flags": ["third_party_widget"], "match": { "classPrefixes": ["crisp-"], "idPrefixes": ["crisp-"] } },
+    { "id": "chat_drift", "kind": "chat_widget", "flags": ["third_party_widget"], "match": { "classPrefixes": ["drift-"], "idPrefixes": ["drift-"] } },
+    { "id": "chat_hubspot", "kind": "chat_widget", "flags": ["third_party_widget"], "match": { "classPrefixes": ["hs-chat-", "hubspot-"], "idPrefixes": ["hubspot-"] } },
+    { "id": "chat_tawk", "kind": "chat_widget", "flags": ["third_party_widget"], "match": { "idPrefixes": ["tawk-"] } },
+    { "id": "accordion_generic", "kind": "accordion", "flags": ["nav_toggle"], "match": { "classTokens": ["accordion", "accordion-item", "accordion-header", "collapsible"] } },
+    { "id": "tabs_generic", "kind": "tabs", "flags": ["nav_toggle"], "match": { "classTokens": ["tabs", "tab-content", "tab-pane", "tablist"] } }
+  ]
+}

compiler/data/pattern-catalog.lock

@@ -0,0 +1 @@
+3f46aca40bb69d5c114e957c28b3a4924c58902cecb35332d34f3065114d0e75

compiler/package.json

@@ -36,8 +36,8 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
-    "playwright": "1.61.1",
-    "pixelmatch": "7.2.0",
+    "playwright": "1.56.1",
+    "pixelmatch": "5.3.0",
     "pngjs": "7.0.0"
   },
   "devDependencies": {

compiler/src/capture/capture.ts

@@ -15,6 +15,8 @@ import { discoverBreakpoints } from "./breakpoints.js";
 import { writeJSON, writeJSONCompact, writeBytes, ensureDir } from "../util/fsx.js";
 import { sha1_12, round } from "../util/canonical.js";
 import { isZipArchive, extractDotLottieJson } from "./dotlottie.js";
+import { buildDeterministicEnvShim, captureEpochMs, DEFAULT_PRNG_SEED } from "../util/envShim.js";
+import { isBotWall, classifyNavFailure } from "../util/captureFailure.js";
 
 export const REQUIRED_VIEWPORTS = [375, 768, 1280, 1920] as const;
 // The dense width set captured for SIZE INFERENCE: a node sampled at 9 widths reveals its sizing
@@ -65,6 +67,10 @@ export type SeoResource = {
 export type CaptureResult = {
   sourceUrl: string;
   capturedAt: string;
+  // Deterministic-env shim parameters actually used for this run (Item 1). Recorded
+  // so a recapture can reuse the exact {seed, epochMs} — the pinned wall clock is a
+  // run-metadata value, not a hardcoded constant. Absent when the shim was disabled.
+  deterministicEnv?: { seed: number; epochMs: number };
   viewports: number[];
   // Browser-as-oracle: the widths where the SOURCE layout actually restructures (display /
   // flex-direction / wrap / grid-track-count / position / visibility flips), found by sweeping the
@@ -797,6 +803,66 @@ async function captureCanvasStills(page: import("playwright").Page): Promise<Can
 // instead of returning a truncated image on pathologically tall pages.
 const CDP_MAX_SHOT_DIMENSION = 16_384;
 
+/**
+ * Item 2: extended lazy-asset DISCOVERY. Returns the deduped, sorted set of asset
+ * URLs referenced through channels the walker + promoteLazyMedia miss:
+ *   (1) <noscript> fallback markup (the walker skips <noscript> entirely) — parsed as
+ *       HTML so real img/source src + srcset are read, not regex-scraped;
+ *   (2) inline element style="…url(…)…" (the walker harvests url() from STYLESHEET
+ *       rules only, not from an element's own style attribute);
+ *   (3) data-background / data-background-image lazy-bg aliases (beyond promoteLazyMedia's
+ *       single data-bg);
+ *   (4) img[loading=lazy] currentSrc — the variant a below-fold image resolved to.
+ * data: URLs and unresolvable refs are dropped. Discovery-only: the caller RECORDS these
+ * for the fallback downloader; nothing here mutates the DOM (snapshots are already taken).
+ * Exported for the fixture tests (page.evaluate'd directly).
+ */
+export function discoverLazyAssetsInPage(): string[] {
+  const urls = new Set<string>();
+  const push = (v: string | null | undefined): void => {
+    if (!v) return;
+    const s = v.trim();
+    if (!s || s.startsWith("data:")) return;
+    try { urls.add(new URL(s, document.baseURI).href); } catch { /* not a URL */ }
+  };
+  const firstOfSrcset = (ss: string): void => {
+    for (const part of ss.split(",")) push(part.trim().split(/\s+/)[0]);
+  };
+  // (1) <noscript> fallback markup.
+  for (const ns of Array.from(document.querySelectorAll("noscript"))) {
+    const html = ns.textContent ?? "";
+    if (!html.includes("<")) continue;
+    let frag: Document;
+    try { frag = new DOMParser().parseFromString(html, "text/html"); } catch { continue; }
+    for (const el of Array.from(frag.querySelectorAll("img,source"))) {
+      push(el.getAttribute("src"));
+      const ss = el.getAttribute("srcset");
+      if (ss) firstOfSrcset(ss);
+    }
+  }
+  // (2) inline style url(...) on any element (background-image / mask / etc.).
+  for (const el of Array.from(document.querySelectorAll("[style]"))) {
+    const st = el.getAttribute("style") ?? "";
+    if (!st.includes("url(")) continue;
+    for (const m of st.matchAll(/url\(\s*(['"]?)([^'")]+)\1\s*\)/gi)) push(m[2]);
+  }
+  // (3) lazy-background data-* aliases the promoter doesn't cover.
+  const BG_ATTRS = ["data-background", "data-background-image"];
+  for (const el of Array.from(document.querySelectorAll(BG_ATTRS.map((a) => `[${a}]`).join(",")))) {
+    for (const a of BG_ATTRS) {
+      const raw = el.getAttribute(a);
+      if (!raw) continue;
+      const m = /url\(\s*(['"]?)([^'")]+)\1\s*\)/i.exec(raw);
+      push(m ? m[2] : raw);
+    }
+  }
+  // (4) the variant a lazy image actually resolved to.
+  for (const img of Array.from(document.querySelectorAll<HTMLImageElement>("img[loading=lazy]"))) {
+    push(img.currentSrc || img.src);
+  }
+  return [...urls].sort();
+}
+
 /**
  * Full-page screenshot via CDP `Page.captureScreenshot` with `captureBeyondViewport:true`.
  * Unlike Playwright's `fullPage:true` (which scroll-stitches — scrolling the page to render
@@ -1004,6 +1070,14 @@ export async function captureSite(opts: {
   interactions?: boolean; // Stage 4: opt-in interaction capture (hover/focus + patterns)
   motion?: boolean; // Stage 5: opt-in motion capture (WAAPI + rotating text)
   breakpoints?: boolean; // discover the source's real responsive band edges (default on; read-only sweep)
+  deterministicEnv?: boolean; // Item 1: seed Math.random + pin the Date epoch BEFORE page JS runs
+                              // (default on), so shuffled carousels / random ids / relative-time text
+                              // ("posted N minutes ago") render the same across captures. Relative time
+                              // still advances (timers behave) and performance.now() stays real.
+  captureEpochMs?: number | string; // pinned wall-clock origin for the shim (ms since epoch, or a
+                                     // date string). Recorded in the result; a recapture passes the
+                                     // previously-recorded value to reproduce time-dependent content.
+  prngSeed?: number; // mulberry32 seed for the pinned Math.random (recorded in the result).
   screenshots?: boolean; // write per-viewport full-page PNGs (default on). ONLY the validator reads these
                          // (generation never touches pixels), and full-page shots of tall pages are the
                          // dominant capture cost — so a production clone that won't be perceptually graded
@@ -1013,6 +1087,13 @@ export async function captureSite(opts: {
 }): Promise<CaptureResult> {
   const viewports = opts.viewports ?? [...REQUIRED_VIEWPORTS];
   const log = opts.log ?? (() => {});
+  // Item 1: resolve the deterministic-env parameters once, at run start, and record
+  // them in the result. The epoch is a run-metadata value (recorded, reproducible),
+  // not a hardcoded constant; performance.now() is left real so motion capture is
+  // unaffected. Defaults on; opts.deterministicEnv === false disables the shim.
+  const deterministicEnvOn = opts.deterministicEnv !== false;
+  const prngSeed = Number.isFinite(opts.prngSeed) ? Math.trunc(opts.prngSeed!) : DEFAULT_PRNG_SEED;
+  const epochMs = captureEpochMs(opts.captureEpochMs);
   const captureDir = join(opts.outDir, "capture");
   const screenshotsDir = join(opts.outDir, "screenshots");
   const cssDir = join(captureDir, "css");
@@ -1178,64 +1259,136 @@ export async function captureSite(opts: {
     // hero on each fresh load) and session-reuse degeneration (warbyparker returned
     // a 13-node shell when reloaded with a carried session). The IR's cross-viewport
     // alignment then operates on one logical DOM that CSS merely reflows.
-    const context: BrowserContext = await browser.newContext({
-      ignoreHTTPSErrors: true,
-      viewport: { width: canonical, height: viewportHeight(canonical) },
-      deviceScaleFactor: 1,
-      userAgent: DESKTOP_UA,
-      javaScriptEnabled: true,
-    });
-    const page = await context.newPage();
-    // tsx/esbuild wraps functions with a __name() helper for stack traces; that
-    // helper does not exist in the browser when we serialize page.evaluate
-    // callbacks. Shim it (as a raw string so it isn't itself transformed).
-    await page.addInitScript(ESBUILD_SHIM);
     const bodyPromises: Promise<void>[] = [];
 
-    page.on("response", (resp) => {
-      try {
-        const url = resp.url();
-        if (url.startsWith("data:") || url.startsWith("blob:")) return;
-        const ct = resp.headers()["content-type"] || null;
-        const type = classifyAsset(url, ct);
-        if (!type) return;
-        const status = resp.status();
-        recordAsset(url, type, ct, status, "network");
-        const existing = assetMap.get(url);
-        if (existing?.storedAs) return;
-        if (status >= 400) return;
-        // A 206 body is a RANGE FRAGMENT (media seek), not the asset — storing it would
-        // ship a corrupt file under first-stored-wins and the full-download fallback
-        // would then skip the asset. Record only; the fallback pass fetches the 200 body.
-        if (status === 206) return;
-        bodyPromises.push(
-          (async () => {
-            try {
-              const buf = await resp.body();
-              storeBytes(url, type, buf);
-              if (type === "css") cssTextsForParsing.push({ baseUrl: url, text: buf.toString("utf8") });
-              if (type === "manifest") parseManifestForAssets(buf.toString("utf8"), url);
-            } catch { /* body unavailable */ }
-          })(),
-        );
-      } catch { /* ignore */ }
-    });
+    // Response listener + init scripts are attached the same way to the initial page
+    // and to any fresh recovery page (Item 3c), so factor the wiring into one helper.
+    const attachResponseListener = (pg: import("playwright").Page): void => {
+      pg.on("response", (resp) => {
+        try {
+          const url = resp.url();
+          if (url.startsWith("data:") || url.startsWith("blob:")) return;
+          const ct = resp.headers()["content-type"] || null;
+          const type = classifyAsset(url, ct);
+          if (!type) return;
+          const status = resp.status();
+          recordAsset(url, type, ct, status, "network");
+          const existing = assetMap.get(url);
+          if (existing?.storedAs) return;
+          if (status >= 400) return;
+          // A 206 body is a RANGE FRAGMENT (media seek), not the asset — storing it would
+          // ship a corrupt file under first-stored-wins and the full-download fallback
+          // would then skip the asset. Record only; the fallback pass fetches the 200 body.
+          if (status === 206) return;
+          bodyPromises.push(
+            (async () => {
+              try {
+                const buf = await resp.body();
+                storeBytes(url, type, buf);
+                if (type === "css") cssTextsForParsing.push({ baseUrl: url, text: buf.toString("utf8") });
+                if (type === "manifest") parseManifestForAssets(buf.toString("utf8"), url);
+              } catch { /* body unavailable */ }
+            })(),
+          );
+        } catch { /* ignore */ }
+      });
+    };
 
-    // Single navigation at the canonical width; every viewport below is a resize.
-    log({ event: "goto", url: opts.url });
-    let navigated = false;
-    let navErr: unknown = null;
-    for (let attempt = 0; attempt < 3 && !navigated; attempt++) {
-      try {
-        await page.goto(opts.url, { waitUntil: attempt === 0 ? "load" : "domcontentloaded", timeout: 45000 });
-        navigated = true;
-      } catch (e) {
-        navErr = e;
-        await page.waitForTimeout(1000);
+    const newSession = async (): Promise<{ context: BrowserContext; page: import("playwright").Page }> => {
+      const ctx: BrowserContext = await browser.newContext({
+        ignoreHTTPSErrors: true,
+        viewport: { width: canonical, height: viewportHeight(canonical) },
+        deviceScaleFactor: 1,
+        userAgent: DESKTOP_UA,
+        javaScriptEnabled: true,
+      });
+      const pg = await ctx.newPage();
+      attachResponseListener(pg);
+      // tsx/esbuild wraps functions with a __name() helper for stack traces; that
+      // helper does not exist in the browser when we serialize page.evaluate
+      // callbacks. Shim it (as a raw string so it isn't itself transformed).
+      await pg.addInitScript(ESBUILD_SHIM);
+      // Item 1: deterministic-env shim — seed Math.random + pin the Date epoch BEFORE
+      // any page script runs. Raw string so tsx/esbuild leaves it byte-exact; the
+      // {seed, epochMs} are the recorded run-metadata values. performance.now() stays
+      // real, so motion.ts marquee/rotator velocity sampling is unaffected.
+      if (deterministicEnvOn) {
+        await pg.addInitScript(buildDeterministicEnvShim({ seed: prngSeed, epochMs }));
       }
+      return { context: ctx, page: pg };
+    };
+
+    // Single context + single navigation; every viewport is captured by RESIZING the
+    // same loaded page (see the block comment above). Item 3c: session recovery is
+    // deliberately scoped to the INITIAL navigation only — carrying one session across
+    // viewports is load-bearing (a reload can degenerate: warbyparker's 13-node shell),
+    // so we never recover mid-loop; we only retry the first nav with a fresh context
+    // when the page/browser died before any content was captured.
+    let { context, page } = await newSession();
+
+    // Total nav budget (Item 3a): a hung origin used to stall for up to ~3×45s + retries
+    // with no ceiling. Bound the WHOLE navigation phase so a dead host fails fast with a
+    // structured error instead of tying up the pipeline. Attempt 0 waits for `load`;
+    // later attempts fall back to `domcontentloaded` (a heavy page may never fire `load`).
+    const NAV_BUDGET_MS = 90_000;
+    const navigateLoaded = async (pg: import("playwright").Page): Promise<void> => {
+      log({ event: "goto", url: opts.url });
+      const navStart = Date.now();
+      let navigated = false;
+      let navErr: unknown = null;
+      for (let attempt = 0; attempt < 3 && !navigated; attempt++) {
+        const remaining = NAV_BUDGET_MS - (Date.now() - navStart);
+        if (remaining < 5_000) break; // not enough budget left for a meaningful attempt
+        try {
+          await pg.goto(opts.url, {
+            waitUntil: attempt === 0 ? "load" : "domcontentloaded",
+            timeout: Math.min(attempt === 0 ? 45_000 : 20_000, remaining),
+          });
+          navigated = true;
+        } catch (e) {
+          navErr = e;
+          await pg.waitForTimeout(1000);
+        }
+      }
+      if (!navigated) {
+        throw new Error(
+          `navigation failed for ${opts.url} within ${Math.round((Date.now() - navStart) / 1000)}s: ${String((navErr as { message?: string })?.message ?? navErr).slice(0, 300)}`,
+        );
+      }
+      await settle(pg);
+    };
+
+    try {
+      await navigateLoaded(page);
+    } catch (navErr) {
+      // Item 3c: one fresh-context retry, but ONLY for a session-death class of failure
+      // (browser/page/context closed, crash, transient reset/timeout). A wall or a hard
+      // terminal error (DNS/cert/refused) is not retried — a fresh context can't fix it.
+      const cls = classifyNavFailure(navErr);
+      if (cls !== "retryable") throw navErr;
+      log({ event: "capture_recover", reason: "session_death_on_initial_nav" });
+      try { if (!page.isClosed()) await page.close(); } catch { /* ignore */ }
+      try { await context.close(); } catch { /* ignore */ }
+      ({ context, page } = await newSession());
+      await navigateLoaded(page); // second failure propagates (no further retry)
+    }
+
+    // Item 3b: bot/auth-wall fast-fail. A wall page would otherwise burn the full
+    // multi-viewport capture and only get flagged by the pollution gate afterward.
+    // Uses the SAME signatures + node-count threshold as the gate (util/captureFailure.ts)
+    // so the abort and the grade agree; the pollution gate stays the shipped-capture
+    // authority, this only saves the wasted work of capturing an obvious wall.
+    const wallProbe = await page
+      .evaluate(() => ({
+        text: (document.body?.innerText ?? "").slice(0, 20_000),
+        nodes: document.querySelectorAll("*").length,
+      }))
+      .catch(() => null);
+    if (isBotWall(wallProbe)) {
+      throw new Error(
+        `auth/bot wall detected at ${opts.url} (${wallProbe!.nodes} nodes, wall text matched): capture aborted early`,
+      );
     }
-    if (!navigated) throw navErr;
-    await settle(page);
 
     // Stage 2: lazy-loader promotion. WP Rocket/lazysizes keep a 0-size placeholder in
     // `src` with the real URL in data attrs; autoScroll outruns their IntersectionObserver
@@ -1641,6 +1794,37 @@ export async function captureSite(opts: {
       log({ event: "captured", viewport: vw, nodes: snapshot.doc.nodeCount, scrollHeight: snapshot.doc.scrollHeight });
     }
 
+    // Item 2: extended lazy-asset discovery sweep. The walker + promoteLazyMedia
+    // already harvest img/source src/srcset and the common data-* lazy attrs
+    // (data-src / data-lazy-src / data-original / data-ll-src / data-(lazy-)srcset)
+    // and picture <source> variants — this sweep ONLY adds the references those miss:
+    //   • <noscript> contents — the walker skips <noscript> entirely, but the fallback
+    //     markup real browsers render with JS off often carries the true <img>/<source> URL;
+    //   • inline element style="…url(…)…" — the walker harvests url() from STYLESHEET
+    //     rules, not from an element's own style attribute (hero background-image inlined);
+    //   • data-background / data-background-image — lazy-bg aliases beyond promoteLazyMedia's
+    //     single data-bg;
+    //   • img[loading=lazy] currentSrc — the resolved variant a below-fold image settled on.
+    // Discovery-ONLY: URLs are recorded through recordAsset so the fallback downloader
+    // fetches them; nothing is promoted into the DOM (the snapshots are already taken, so
+    // this can never shift a captured layout). Bounded so a pathological page can't explode
+    // the fallback fetch phase.
+    try {
+      const sweptRefs: string[] = await page.evaluate(discoverLazyAssetsInPage);
+      let swept = 0;
+      for (const url of sweptRefs) {
+        if (swept >= 120) break; // bound pathological pages (fallback fetch is 30s/asset)
+        if (!/^https?:\/\//i.test(url) || assetMap.has(url)) continue;
+        const t = classifyAsset(url, null);
+        if (!t || !["image", "svg", "video", "font", "lottie"].includes(t)) continue;
+        recordAsset(url, t, null, null, "lazy-sweep");
+        swept++;
+      }
+      if (swept) log({ event: "lazy_sweep", recorded: swept, seen: sweptRefs.length });
+    } catch (e) {
+      log({ event: "lazy_sweep_error", error: String((e as { message?: string })?.message ?? e).slice(0, 160) });
+    }
+
     // Browser-as-oracle: discover the source's real responsive band edges by sweeping the viewport
     // and binary-searching each width where the discrete (media-query-toggled) layout signature
     // changes. Read-only and bounded; runs once here — overlays are dismissed and the DOM settled, so
@@ -1754,6 +1938,7 @@ export async function captureSite(opts: {
   const result: CaptureResult = {
     sourceUrl: opts.url,
     capturedAt: new Date().toISOString(),
+    ...(deterministicEnvOn ? { deterministicEnv: { seed: prngSeed, epochMs } } : {}),
     viewports,
     breakpoints: discoveredBreakpoints,
     perViewport,

compiler/src/generate/app.ts

@@ -14,6 +14,7 @@ import type { FontGraph } from "../infer/fonts.js";
 import { SYSTEM_FALLBACK } from "../infer/fonts.js";
 import { detectComponents, type ComponentPlan, type ComponentCluster } from "../infer/components.js";
 import { buildClassMap } from "./classMap.js";
+import { generatePreviewHtml } from "./preview.js";
 import { buildTailwind, tailwindGlobalsCss } from "./tailwind.js";
 import { planSections, type SectionPlan } from "./sectionSplit.js";
 import type { RecipeReport } from "../infer/recipes.js";
@@ -2659,7 +2660,7 @@ export function recipeResponsiveClassCleaner(ir: IR, recipes: RecipeReport | und
   };
 }
 
-export function generateApp(input: GenerateInput, tokensCss: string): { pageTsx: string; cloneCss: string; components: ExtractedComponent[] } {
+export function generateApp(input: GenerateInput, tokensCss: string): { pageTsx: string; cloneCss: string; components: ExtractedComponent[]; previewHtml: string } {
   const { ir, assetGraph, fontGraph, appDir, sourceUrl } = input;
   const assetMap = buildAssetMap(assetGraph);
   const framework = input.framework ?? "next";
@@ -2789,6 +2790,16 @@ export function generateApp(input: GenerateInput, tokensCss: string): { pageTsx:
     writeText(join(rootDir, "globals.css"), framework === "vite" ? viteGlobalsCss(globals) : globals);
   }
   writeText(join(rootDir, "ditto.css"), cloneCss);
+  // Fast, self-contained static preview (runtime-free single HTML file) the service can
+  // render within seconds of `generate`, BEFORE the Next build + deploy completes. Emitted
+  // at generated/app/preview.html (assets relative to public/); shares the same IR + css.ts
+  // rule/banding collectors and the same propsList/resolveTag decision code as the app,
+  // so it shows what the built app will show without a second maintained emission path.
+  const previewPath = "preview.html";
+  writeText(join(appDir, previewPath), generatePreviewHtml({
+    ir, assetMap, fontGraph, tokensCss, sourceUrl,
+    colorVar: input.colorVar, tokenResolver: input.tokenResolver,
+  }));
   writeText(join(appDir, "src", "lib", "utils.ts"), CN_UTILS_MODULE);
   // SITE_ORIGIN constant for SEO/metadata routes (Next only — Vite ships static SEO files).
   if (framework === "next") writeText(join(appDir, "src", "lib", "site.ts"), SITE_ORIGIN_MODULE);
@@ -2830,7 +2841,7 @@ export function generateApp(input: GenerateInput, tokensCss: string): { pageTsx:
     ],
   });
 
-  return { pageTsx, cloneCss, components: components ? summarizeComponents(components) : [] };
+  return { pageTsx, cloneCss, components: components ? summarizeComponents(components) : [], previewHtml: previewPath };
 }
 
 /** Add lottie-web to a generated package.json's dependencies — DittoLottie imports it at

compiler/src/generate/css.ts

@@ -1952,6 +1952,7 @@ function fixedWidthButtonLike(node: IRNode, viewports: number[]): boolean {
   if (node.tag !== "a" && node.tag !== "button") return false;
   const widths: number[] = [];
   let sampled = 0;
+  let contentFit = true;
   for (const vp of viewports) {
     const cs = node.computedByVp[vp];
     const bb = node.bboxByVp[vp];
@@ -1962,7 +1963,21 @@ function fixedWidthButtonLike(node: IRNode, viewports: number[]): boolean {
     if (pf(cs.borderTopLeftRadius) < 12 && pf(cs.borderTopRightRadius) < 12) return false;
     if (bb.width < 120 || bb.height < 28) return false;
     widths.push(bb.width);
+    // Content-fit evidence: the sizing probe proved `width:auto` reproduces this box AND it paints
+    // exactly at its own max-content width, with genuinely wrappable text inside (wMin < wMax).
+    const sz = node.sizingByVp?.[vp];
+    if (!(sz?.wAuto === true && sz.wMax != null && sz.wMin != null && sz.wMin < sz.wMax - 2 &&
+          Math.abs(bb.width - sz.wMax) <= Math.max(1.5, 0.01 * sz.wMax))) contentFit = false;
   }
+  // A constant width alone is weak evidence of an AUTHORED fixed width: a content-sized chip whose
+  // label never changes paints the same width at every viewport it's shown at. When the probe proved
+  // width:auto reproduces the box at its max-content at EVERY sample, the width is content-derived —
+  // don't lock it. Baking that px invites the emitters' quantization (snapLen's 0.1px rounding,
+  // snapBase's ≤0.25px spacing-scale snap) to land fractionally BELOW the intrinsic single-line
+  // width, wrapping the label onto a second line; the probe verdict (sizingVerdict → width:auto)
+  // reproduces the box intrinsically at every width instead. Authored intent (sourceFixedWidth /
+  // sourceFixedSize, checked by the caller) still locks.
+  if (sampled >= 1 && contentFit) return false;
   return sampled >= 2 && widths.length >= 2 && Math.max(...widths) - Math.min(...widths) <= 2;
 }
 
@@ -3120,7 +3135,10 @@ function centeredAtVp(node: IRNode, parentNode: IRNode, vp: number): boolean {
  *  column resolving fractionally narrower) tips it onto a second line. Such a node earns an explicit
  *  `white-space:nowrap` (see declsForViewport) to stay one line as it did in the capture.
  *  Conservative by construction — every guard must hold at every painted viewport:
- *   • text leaf (direct text, no element children), whitespace not already preserved (`pre*`);
+ *   • text leaf (direct text; element children only if REPLACED — an icon <svg>/<img> beside the
+ *     label, the icon+text chip shape. A replaced box can't wrap and its constant width is already
+ *     inside the probe's wMin/wMax, so the math below is unchanged; any other element child may
+ *     carry its own text and bails), whitespace not already preserved (`pre*`);
  *   • single line: box height ≈ one line box (line-height + vertical padding/border), so a genuinely
  *     wrapping paragraph (≥2 line boxes tall) is excluded;
  *   • wrap-vulnerable: max-content (unwrapped) width ≥ available container width − 2 and ≤ it + 1 —
@@ -3130,7 +3148,7 @@ function centeredAtVp(node: IRNode, parentNode: IRNode, vp: number): boolean {
  *  Relies on the sizing probe's wMin/wMax (present only for in-flow probed leaves); absent ⇒ no emit. */
 function nowrapWrapVulnerable(node: IRNode, parentNode: IRNode | undefined, viewports: number[]): boolean {
   if (!parentNode) return false;
-  if (hasElementChild(node)) return false;
+  if (node.children.some((c) => !isTextChild(c) && !REPLACED.has(c.tag))) return false;
   if (!node.children.some((c) => isTextChild(c) && c.text.trim() !== "")) return false;
   if (REPLACED.has(node.tag) || node.tag === "canvas" || node.tag.includes("-")) return false;
   let painted = 0;

compiler/src/generate/manifest.ts

@@ -4,6 +4,7 @@ import type { Tokens } from "../infer/tokens.js";
 import type { AssetGraph } from "../infer/assets.js";
 import type { FontGraph } from "../infer/fonts.js";
 import type { CaptureResult } from "../capture/capture.js";
+import type { PatternHints } from "../knowledge/patternIndex.js";
 
 export const COMPILER_VERSION = "0.1.0";
 export const SCHEMA_VERSION = 1;
@@ -16,8 +17,13 @@ export function buildManifest(args: {
   fontGraph: FontGraph;
   capture: CaptureResult;
   componentCount: number;
+  patternHints?: PatternHints;
+  // Relative path (within generated/app) of the static preview artifact, when emitted.
+  // Lets the service/client show the cloned page from the file map BEFORE the Next build
+  // + deploy finishes, then swap to the deployed app. A fixed string — no timestamps.
+  previewHtml?: string;
 }): Record<string, unknown> {
-  const { ir, sections, tokens, assetGraph, fontGraph, capture, componentCount } = args;
+  const { ir, sections, tokens, assetGraph, fontGraph, capture, componentCount, patternHints, previewHtml } = args;
 
   const byType: Record<string, number> = {};
   let downloaded = 0, skipped = 0;
@@ -56,6 +62,26 @@ export function buildManifest(args: {
       fallback: fontGraph.entries.filter((f) => f.status === "fallback").length,
     },
     components: { count: componentCount },
+    // Static preview artifact (runtime-free, single HTML file) the client can render
+    // immediately from the file map. Omitted when not emitted.
+    ...(previewHtml ? { preview_html: previewHtml } : {}),
+    // Frozen-catalog pattern evidence (hint-only, additive): library/platform fingerprints
+    // detected in the IR, with the node cids that carried each signature (bounded pre-order
+    // sample). Deterministic — matches are id-sorted and cids are pre-order, so the same
+    // catalog + IR yields byte-identical evidence. Generated docs read this to say e.g.
+    // "Swiper carousel detected". Omitted when no hints were computed.
+    ...(patternHints
+      ? {
+          patterns: {
+            catalogVersion: patternHints.catalogVersion,
+            catalogHash: patternHints.catalogHash,
+            flags: patternHints.flags,
+            platforms: patternHints.platforms,
+            simpleStatic: patternHints.simpleStatic,
+            matches: patternHints.matches.map((m) => ({ id: m.id, kind: m.kind, count: m.count, cids: m.cids })),
+          },
+        }
+      : {}),
     // Fidelity note: containers whose children were a DIFFERENT SET at some band viewport(s)
     // (content-identity drift — the source deterministically served other content there). The
     // clone shows the canonical-viewport children at those widths (faithful-at-canonical) instead

compiler/src/generate/pipeline.ts

@@ -13,6 +13,7 @@ import { buildCodeQualityReport, codeQualityReportToMarkdown, type CodeQualityRe
 import { interactionRejectedSet } from "./interactive.js";
 import { buildManifest } from "./manifest.js";
 import { buildSeoInventory, seoInventoryToMarkdown, type SeoInventory } from "./seo.js";
+import { resolvePatternHints, type PatternHints } from "../knowledge/patternIndex.js";
 import { writeJSON, writeText, readJSON, fileExists } from "../util/fsx.js";
 import type { CaptureResult } from "../capture/capture.js";
 
@@ -24,6 +25,7 @@ export type GenerateAllResult = {
   fontGraph: FontGraph;
   recipeReport: RecipeReport;
   interactionRecipeReport: InteractionRecipeReport;
+  patternHints: PatternHints;
   seoInventory: SeoInventory;
   codeQuality: CodeQualityReport;
   manifest: Record<string, unknown>;
@@ -59,6 +61,10 @@ export function generateAll(opts: {
 
   const sections = detectSections(ir);
   const tokens = extractTokens(ir);
+  // Pattern hints: frozen-catalog signature scan over the IR (deterministic; the
+  // pin is asserted here and throws on catalog/lock drift). Fed as ADDITIVE evidence
+  // into recipe recognition — never overrides captured geometry.
+  const patternHints = resolvePatternHints(ir);
   const assetGraph = buildAssetGraph(capture);
   const fontGraph = buildFontGraph(capture.fontFaces, assetGraph, url);
   const seoInventory = buildSeoInventory(ir, assetGraph, capture);
@@ -69,7 +75,7 @@ export function generateAll(opts: {
   const tokensCss = (palette.css ? palette.css + "\n" : "") + tokensToCss(tokens, true);
   const tokenResolver = buildTokenResolver(tokens);
   const primitives = recognizePrimitives(ir);
-  const recipeReport = buildRecipeReport(ir, sections, primitives);
+  const recipeReport = buildRecipeReport(ir, sections, primitives, patternHints);
   const interactionRecipeReport = buildInteractionRecipeReport(ir, sections, capture.interaction);
   // Patterns the interaction gate previously rejected (don't reproduce) → left static.
   const rejPath = join(sourceDir, "interaction-rejected.json");
@@ -95,6 +101,7 @@ export function generateAll(opts: {
   writeJSON(join(outDir, "fonts.json"), fontGraph.entries);
   const inventory = inventoryOf(ir, primitives);
   writeJSON(join(outDir, "components.json"), inventory);
+  writeJSON(join(outDir, "patterns.json"), patternHints);
   writeJSON(join(outDir, "recipes.json"), recipeReport);
   writeText(join(outDir, "recipes.md"), recipeReportToMarkdown(recipeReport));
   writeJSON(join(outDir, "interaction-recipes.json"), interactionRecipeReport);
@@ -104,8 +111,8 @@ export function generateAll(opts: {
   const codeQuality = buildCodeQualityReport(appDir, recipeReport);
   writeJSON(join(outDir, "code-quality.json"), codeQuality);
   writeText(join(outDir, "code-quality.md"), codeQualityReportToMarkdown(codeQuality));
-  const manifest = buildManifest({ ir, sections, tokens, assetGraph, fontGraph, capture, componentCount: inventory.count });
+  const manifest = buildManifest({ ir, sections, tokens, assetGraph, fontGraph, capture, componentCount: inventory.count, patternHints, previewHtml: gen.previewHtml });
   writeJSON(join(outDir, "manifest.json"), manifest);
 
-  return { ir, sections, tokens, assetGraph, fontGraph, recipeReport, interactionRecipeReport, seoInventory, codeQuality, manifest, assetsCopied: mat.copied, assetsMissing: mat.missing };
+  return { ir, sections, tokens, assetGraph, fontGraph, recipeReport, interactionRecipeReport, patternHints, seoInventory, codeQuality, manifest, assetsCopied: mat.copied, assetsMissing: mat.missing };
 }

compiler/src/generate/preview.ts

@@ -0,0 +1,243 @@
+import { isTextChild, type IR, type IRNode, type IRChild } from "../normalize/ir.js";
+import type { FontGraph } from "../infer/fonts.js";
+import { SYSTEM_FALLBACK } from "../infer/fonts.js";
+import { collectNodeRules, keyframesCss, computeBands, assembleCss, RESET_CSS } from "./css.js";
+import type { TokenResolver } from "../infer/tokens.js";
+import { propsList, resolveTag, resolveHtmlBg, htmlBgRule } from "./app.js";
+
+/**
+ * Fast, self-contained static preview artifact (`preview.html`).
+ *
+ * Product moment: the service shows the cloned page within seconds of `generate`
+ * finishing — BEFORE the Next.js build + deploy completes — then swaps to the
+ * deployed app. This artifact renders WITHOUT any build toolchain (no next / tailwind
+ * / esbuild): it is pure string building over the same frozen IR + rules the JSX
+ * emitter consumes.
+ *
+ * SHARED DECISION CODE (not a parallel emission path):
+ *  - CSS: `collectNodeRules` + `keyframesCss` + `computeBands` + `assembleCss` from
+ *    css.ts — the identical per-node rule collection + media-query banding the semantic
+ *    class-map emitter (classMap.ts) and the legacy per-node emitter (generateCss) use.
+ *    We emit `.c<id>` selectors, exactly like `generateCss`, so the preview's computed
+ *    styles are byte-for-byte the same rules the built app resolves to. Crucially this
+ *    holds even though the app's DEFAULT output is Tailwind (utilities in the JSX, no
+ *    `.c<id>` rules) — the preview reuses the css-mode rule collector directly.
+ *  - HTML: `propsList` + `resolveTag` from app.ts — the SAME tag resolution, attribute
+ *    filtering, asset-URL mapping (src/poster/srcset), video/lottie poster stills, and
+ *    class assignment the JSX renderer uses. We translate the JSX-flavoured attribute
+ *    pairs to raw HTML attributes; we do NOT re-derive which attrs/assets to keep.
+ *
+ * Runtime-free: no DittoWire / DittoLottie / DittoMotion scripts. Lottie mounts and
+ * <video> render as their captured poster/first-frame stills (the still is already
+ * baked into the node's `poster`/`src` attr by capture + the asset pipeline, so
+ * `propsList` emits it for us). Animations are frozen at their captured start state.
+ *
+ * Determinism (sacred): derived purely from the IR + rules + asset map; no timestamps,
+ * no randomness. Two runs over the same frozen capture emit byte-identical HTML.
+ *
+ * Asset paths: the asset map yields root-absolute `/assets/cloned/...` (public/ served
+ * at the app root under Next). preview.html physically sits at generated/app/preview.html
+ * with assets under generated/app/public/assets/cloned/..., so we rewrite the leading
+ * `/assets/` to `public/assets/` — a relative path that resolves both when the file is
+ * opened at the generated app-dir root and when it is fetched alongside the file map.
+ */
+
+const VOID_TAGS = new Set(["area", "base", "br", "col", "embed", "hr", "img", "input", "link", "meta", "param", "source", "track", "wbr"]);
+
+// Inverse of app.ts's ATTR_RENAME (HTML → React). The JSX `propsList` renames HTML
+// attribute names to their React spelling (for → htmlFor, class → className, …); the
+// preview emits raw HTML, so map them back. Anything not listed is already an HTML name.
+const REACT_TO_HTML: Record<string, string> = {
+  htmlFor: "for", className: "class", srcSet: "srcset", colSpan: "colspan",
+  rowSpan: "rowspan", dateTime: "datetime", itemProp: "itemprop", hrefLang: "hreflang",
+  autoPlay: "autoplay", playsInline: "playsinline", readOnly: "readonly",
+  maxLength: "maxlength", crossOrigin: "crossorigin", noValidate: "novalidate",
+  tabIndex: "tabindex", contentEditable: "contenteditable", defaultChecked: "checked",
+};
+
+/** Rewrite the asset map's root-absolute `/assets/…` refs to the preview's relative
+ *  `public/assets/…` layout (preview.html at generated/app/, assets at generated/app/public/).
+ *  Applied to both inline CSS (url(/assets/…)) and HTML attribute values. Pure string op. */
+function relativizeAssets(s: string): string {
+  return s.replace(/\/assets\//g, "public/assets/");
+}
+
+function escapeAttr(v: string): string {
+  return v.replace(/&/g, "&amp;").replace(/"/g, "&quot;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+}
+
+function escapeText(raw: string): string {
+  return raw.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+}
+
+/** Collapse a text run under white-space:normal the way CSS renders it (mirrors app.ts's
+ *  collapseWs): every whitespace run → a single space. Verbatim under pre/pre-wrap etc. */
+function collapseWs(raw: string): string {
+  return raw.replace(/\s+/g, " ");
+}
+
+function preservesWhitespace(n: IRNode, canonical: number): boolean {
+  const ws = (n.computedByVp[canonical] ?? Object.values(n.computedByVp)[0])?.whiteSpace;
+  if (ws) return /^(pre|pre-wrap|pre-line|break-spaces)$/.test(ws);
+  return n.tag === "pre" || n.tag === "textarea";
+}
+
+// Element-only parents whose direct whitespace-only text children are non-significant
+// (mirrors app.ts's ELEMENT_ONLY_PARENTS): a stray "\n  " between <li>s is source
+// indentation, not content.
+const ELEMENT_ONLY_PARENTS = new Set(["ul", "ol", "table", "thead", "tbody", "tfoot", "tr", "select", "colgroup", "optgroup", "menu", "dl"]);
+
+/** Translate one JSX-flavoured [key, valueSrc] pair from propsList into a raw HTML
+ *  attribute string (leading space), or "" to drop it. valueSrc is ready-to-emit JS
+ *  source: a JSON string literal, `true`, or a `{ __html: … }` object (SVG inner — the
+ *  caller handles that separately, so we skip it here). */
+function htmlAttr(key: string, valueSrc: string): string {
+  // The SVG inner-markup prop is emitted as literal inner HTML by the caller.
+  if (key === "dangerouslySetInnerHTML") return "";
+  const rawName = key.startsWith('"') ? key.slice(1, -1) : key;
+  const name = REACT_TO_HTML[rawName] ?? rawName;
+  if (valueSrc === "true") return ` ${name}`;
+  if (valueSrc === "false") return "";
+  let value: string;
+  if (valueSrc.startsWith('"')) {
+    try { value = JSON.parse(valueSrc) as string; } catch { return ""; }
+  } else {
+    // A `{ __html … }` object or other non-string expression — not a plain HTML attr.
+    return "";
+  }
+  // Asset attrs (src/poster/srcset) and any inline url() carry the /assets/ prefix.
+  if (name === "src" || name === "poster" || name === "srcset" || name === "style") value = relativizeAssets(value);
+  return ` ${name}="${escapeAttr(value)}"`;
+}
+
+/** The raw-HTML attribute string for a node — REUSES propsList (app.ts) so tag/attr/asset
+ *  decisions are identical to the JSX path; we only re-serialize to HTML. No ctx is passed,
+ *  so propsList assigns the legacy `c<id>` class (matching our `.c<id>` CSS) and emits
+ *  data-cid; component/section/svg-module machinery is inert (the composed DOM is the same). */
+function attrsForNode(node: IRNode, assetMap: Map<string, string>, sourceUrl: string): string {
+  return propsList(node, assetMap, sourceUrl).map(([k, v]) => htmlAttr(k, v)).join("");
+}
+
+/** The inner markup of an inline <svg> node, taken verbatim from the propsList
+ *  `dangerouslySetInnerHTML` prop (already browser-serialized, capture-id stripped, start
+ *  state revealed) — shared with the JSX path, url()s relativized. */
+function svgInner(node: IRNode, assetMap: Map<string, string>, sourceUrl: string): string {
+  for (const [k, v] of propsList(node, assetMap, sourceUrl)) {
+    if (k !== "dangerouslySetInnerHTML") continue;
+    const m = /\{\s*__html:\s*(".*")\s*\}$/s.exec(v);
+    if (!m) return "";
+    try { return relativizeAssets(JSON.parse(m[1]!) as string); } catch { return ""; }
+  }
+  return "";
+}
+
+function renderNode(node: IRNode, assetMap: Map<string, string>, sourceUrl: string, canonical: number, indent: number, insideInteractive: boolean, insideTable: boolean): string {
+  const pad = "  ".repeat(indent);
+  const tag = resolveTag(node, insideInteractive, insideTable);
+  const attrs = attrsForNode(node, assetMap, sourceUrl);
+  const childInteractive = insideInteractive || node.tag === "a" || node.tag === "button";
+  const childTable = insideTable || node.tag === "table";
+
+  // Inline SVG: emit the shared inner markup verbatim inside the <svg> box.
+  if (node.rawHTML && tag === "svg") {
+    const inner = svgInner(node, assetMap, sourceUrl);
+    return inner ? `${pad}<svg${attrs}>${inner}</svg>` : `${pad}<svg${attrs}></svg>`;
+  }
+  if (VOID_TAGS.has(tag)) return `${pad}<${tag}${attrs} />`;
+
+  const children = renderChildren(node.children, tag, assetMap, sourceUrl, canonical, indent + 1, childInteractive, childTable, preservesWhitespace(node, canonical));
+  if (children.length === 0) return `${pad}<${tag}${attrs}></${tag}>`;
+  return `${pad}<${tag}${attrs}>\n${children.join("\n")}\n${pad}</${tag}>`;
+}
+
+function renderChildren(children: IRChild[], parentTag: string | null, assetMap: Map<string, string>, sourceUrl: string, canonical: number, indent: number, insideInteractive: boolean, insideTable: boolean, preserveWs: boolean): string[] {
+  const pad = "  ".repeat(indent);
+  const parts: string[] = [];
+  // Coalesce adjacent text children into one node (the browser merges them anyway).
+  let textBuf = "";
+  const flush = () => {
+    if (parentTag && ELEMENT_ONLY_PARENTS.has(parentTag) && textBuf.trim() === "") { textBuf = ""; return; }
+    const out = preserveWs ? textBuf : collapseWs(textBuf);
+    if (out.length) parts.push(`${pad}${escapeText(out)}`);
+    textBuf = "";
+  };
+  for (const c of children) {
+    if (isTextChild(c)) { textBuf += c.text; continue; }
+    // <source>/<track> children: kept only if the JSX path would keep them. The JSX
+    // emitter filters video <track> and non-materialized <source>; but propsList/resolveTag
+    // don't, so filter here to match. A video/picture <source> without a local candidate
+    // and any <video> <track> would otherwise reference a missing/remote file.
+    if (parentTag === "video" && c.tag === "track") continue;
+    flush();
+    parts.push(renderNode(c, assetMap, sourceUrl, canonical, indent, insideInteractive, insideTable));
+  }
+  flush();
+  return parts;
+}
+
+/** The inline stylesheet: reset + fonts + tokens + page base + per-node rules + keyframes.
+ *  The per-node rules and keyframes come from the SHARED css.ts collectors (identical to
+ *  what the built app resolves to); all url()/asset refs are relativized. */
+function previewCss(ir: IR, assetMap: Map<string, string>, tokensCss: string, fontGraph: FontGraph, colorVar?: (v: string) => string | null, tokenResolver?: TokenResolver): string {
+  const rules = collectNodeRules(ir, assetMap, undefined, colorVar, tokenResolver);
+  const bands = computeBands(ir.doc.viewports, ir.doc.canonicalViewport);
+  const kf = keyframesCss(ir, assetMap);
+  const nodeCss = assembleCss([...rules.keys()], (cid) => rules.get(cid)!, (cid) => `.c${cid}`, bands, kf);
+
+  const pv = ir.doc.perViewport[ir.doc.canonicalViewport];
+  const htmlBg = resolveHtmlBg(pv);
+  const noHScroll = Object.entries(ir.doc.perViewport).every(([vp, d]) => d.scrollWidth <= Number(vp) * 1.03);
+  const clip = noHScroll ? "\nhtml, body { overflow-x: clip; }" : "";
+
+  const doc = `${RESET_CSS}
+/* fonts */
+${fontGraph.css}
+
+/* tokens */
+${tokensCss}
+
+/* page base */
+${htmlBgRule(htmlBg)}body { font-family: ${SYSTEM_FALLBACK}; }${clip}
+
+/* nodes */
+${nodeCss}`;
+  return relativizeAssets(doc);
+}
+
+/**
+ * Emit the standalone `preview.html` document as a string. Pure + deterministic.
+ * `tokensCss` is the assembled color-palette + token CSS (same string the pipeline
+ * feeds generateApp). `sourceUrl` drives asset-URL resolution (matching the JSX path).
+ */
+export function generatePreviewHtml(input: {
+  ir: IR;
+  assetMap: Map<string, string>;
+  fontGraph: FontGraph;
+  tokensCss: string;
+  sourceUrl: string;
+  colorVar?: (v: string) => string | null;
+  tokenResolver?: TokenResolver;
+}): string {
+  const { ir, assetMap, fontGraph, tokensCss, sourceUrl, colorVar, tokenResolver } = input;
+  const canonical = ir.doc.canonicalViewport;
+  const css = previewCss(ir, assetMap, tokensCss, fontGraph, colorVar, tokenResolver);
+  const body = renderChildren(ir.root.children, ir.root.tag, assetMap, sourceUrl, canonical, 2, false, false, false).join("\n");
+  const bodyAttrs = attrsForNode(ir.root, assetMap, sourceUrl);
+  const lang = ir.doc.lang || "en";
+  const title = ir.doc.title || "Preview";
+  return `<!doctype html>
+<html lang="${escapeAttr(lang)}">
+<head>
+<meta charset="${escapeAttr(ir.doc.charset || "utf-8")}" />
+<meta name="viewport" content="${escapeAttr(ir.doc.metaViewport || "width=device-width, initial-scale=1")}" />
+<title>${escapeText(title)}</title>
+<style>
+${css}
+</style>
+</head>
+<body${bodyAttrs}>
+${body}
+</body>
+</html>
+`;
+}

compiler/src/index.ts

@@ -32,6 +32,10 @@ export type { GateResult } from "./validate/gates.js";
 export { buildIR } from "./normalize/ir.js";
 export type { IR } from "./normalize/ir.js";
 
+// ---- Pattern knowledge (frozen catalog; deterministic hints; pin asserted on load) ----
+export { resolvePatternHints, loadPatternIndex, assertPinnedCatalog, matchCatalogNode } from "./knowledge/patternIndex.js";
+export type { PatternHints, PatternMatch, PatternDef, PatternCatalog } from "./knowledge/patternIndex.js";
+
 // ---- Capture surface + version ----
 export { captureSite, REQUIRED_VIEWPORTS } from "./capture/capture.js";
 export type { CaptureResult } from "./capture/capture.js";

compiler/src/infer/recipes.ts

@@ -3,6 +3,7 @@ import { isTextChild } from "../normalize/ir.js";
 import type { PrimitiveType } from "./primitives.js";
 import type { Section } from "./sections.js";
 import { round } from "../util/canonical.js";
+import { matchCatalogNode, type PatternDef, type PatternHints } from "../knowledge/patternIndex.js";
 
 export type RecipeKind = "logo-cloud" | "feature-grid" | "card-grid" | "product-grid" | "gallery-showcase" | "cta-band";
 
@@ -60,6 +61,8 @@ export type RecipeReport = {
     highConfidence: number;
     byKind: Record<string, number>;
     templateReadyKinds: RecipeKind[];
+    /** page-level frozen-catalog pattern ids (from resolvePatternHints), when provided */
+    catalogPatterns?: string[];
   };
   candidates: RecipeCandidate[];
 };
@@ -78,6 +81,10 @@ type RecipeContext = {
   parentById: ParentMap;
   sectionByNodeId: SectionMap;
   primitives: Map<string, PrimitiveType>;
+  /** per-node frozen-catalog matches, memoized (pattern catalog as a 4th evidence source) */
+  catalogByCid: Map<string, PatternDef[]>;
+  /** page-level catalog flags from resolvePatternHints (e.g. platform_shopify, ecommerce) */
+  pageFlags: Set<string>;
 };
 
 type ItemStats = {
@@ -233,7 +240,7 @@ function nodeStats(ctx: RecipeContext, n: IRNode): ItemStats {
   };
 }
 
-function buildContext(ir: IR, sections: Section[], primitives: Map<string, PrimitiveType>): RecipeContext {
+function buildContext(ir: IR, sections: Section[], primitives: Map<string, PrimitiveType>, patternHints?: PatternHints): RecipeContext {
   const nodes: IRNode[] = [];
   const byId: NodeMap = new Map();
   const parentById: ParentMap = new Map();
@@ -254,9 +261,32 @@ function buildContext(ir: IR, sections: Section[], primitives: Map<string, Primi
     parentById,
     sectionByNodeId: new Map(sections.map((s) => [s.nodeId, s])),
     primitives,
+    catalogByCid: new Map(),
+    pageFlags: new Set(patternHints?.flags ?? []),
   };
 }
 
+function catalogDefs(ctx: RecipeContext, node: IRNode): PatternDef[] {
+  let defs = ctx.catalogByCid.get(node.id);
+  if (!defs) {
+    defs = matchCatalogNode(node);
+    ctx.catalogByCid.set(node.id, defs);
+  }
+  return defs;
+}
+
+/** First catalog pattern in `root`'s subtree matching `pred` (pre-order; memoized
+ *  per node). The frozen catalog is deterministic, so recipe evidence stays
+ *  byte-stable across regenerations. */
+function subtreeCatalogMatch(ctx: RecipeContext, root: IRNode, pred: (d: PatternDef) => boolean): PatternDef | null {
+  for (const d of catalogDefs(ctx, root)) if (pred(d)) return d;
+  for (const c of elementChildren(root)) {
+    const hit = subtreeCatalogMatch(ctx, c, pred);
+    if (hit) return hit;
+  }
+  return null;
+}
+
 function nearestSection(ctx: RecipeContext, n: IRNode): Section | undefined {
   let cur: IRNode | undefined = n;
   while (cur) {
@@ -545,18 +575,23 @@ function detectLogoClouds(ctx: RecipeContext): RecipeDraft[] {
     const rootText = textContent(root, 1200);
     const layout = isLayoutish(ctx, parent, logos.map((s) => s.node));
     const avgHeight = logos.reduce((sum, s) => sum + (s.bbox?.height ?? 0), 0) / logos.length;
+    // Logo strips often ride marquee libraries (react-fast-marquee, ticker) —
+    // a catalog marquee hit is strong logo-cloud evidence.
+    const catalogMarquee = subtreeCatalogMatch(ctx, parent, (d) => d.kind === "marquee");
     const signals = [
       `${logos.length} repeated media-light children`,
       layout ? "item parent behaves like grid/flex/wrapped row" : "item parent has repeated logo geometry",
       TRUSTED_COPY.test(rootText) ? "nearby copy matches trusted-by/brand language" : "",
       avgHeight <= 96 ? "logo item boxes stay small" : "",
+      catalogMarquee ? `pattern catalog identifies a ${catalogMarquee.id} strip` : "",
     ].filter(Boolean);
     const confidence = 0.58
       + Math.min(0.18, logos.length * 0.025)
       + (logos.length / kids.length) * 0.12
       + (layout ? 0.08 : 0)
       + (TRUSTED_COPY.test(rootText) ? 0.10 : 0)
-      + (avgHeight <= 96 ? 0.04 : 0);
+      + (avgHeight <= 96 ? 0.04 : 0)
+      + (catalogMarquee ? 0.04 : 0);
     out.push(baseDraft(ctx, "logo-cloud", parent, logos, confidence, signals));
   }
   return out;
@@ -568,6 +603,10 @@ function detectGrids(ctx: RecipeContext): RecipeDraft[] {
   for (const parent of ctx.nodes) {
     if (parent.id === ctx.ir.root.id) continue;
     if (subtreeSourceClassMatches(parent, DEFERRED_INTERACTIVE_COLLECTION)) continue;
+    // Catalog-known carousel/marquee libraries the regex misses (embla, flickity,
+    // keen-slider, glide, tns, …) are the same deferred-interactive class: their
+    // children are slides, not a static grid.
+    if (subtreeCatalogMatch(ctx, parent, (d) => d.kind === "carousel" || d.kind === "marquee")) continue;
     const kids = visibleElementChildren(parent, ctx.cw);
     if (kids.length < 2 || kids.length > 36) continue;
     const stats = kids.map((k) => nodeStats(ctx, k));
@@ -581,7 +620,10 @@ function detectGrids(ctx: RecipeContext): RecipeDraft[] {
     const rootTooBroad = rootInfo.root.id === ctx.ir.root.id || (!!pageH && !!rootBox && rootBox.height > pageH * 0.55);
     const localText = textContent(parent, 1200);
     const parentText = rootTooBroad ? localText : textContent(rootInfo.root, 1600);
-    const galleryContext = subtreeAttrOrSourceMatches(parent, GALLERY_SOURCE) || (!rootTooBroad && subtreeAttrOrSourceMatches(rootInfo.root, GALLERY_SOURCE));
+    // Lightbox libraries (fancybox, photoswipe, lightGallery, …) mark a thumbnail
+    // grid as a gallery even when no gallery-ish class names are present.
+    const catalogLightbox = subtreeCatalogMatch(ctx, parent, (d) => d.kind === "lightbox");
+    const galleryContext = subtreeAttrOrSourceMatches(parent, GALLERY_SOURCE) || (!rootTooBroad && subtreeAttrOrSourceMatches(rootInfo.root, GALLERY_SOURCE)) || !!catalogLightbox;
     const testimonialContext = subtreeAttrOrSourceMatches(parent, TESTIMONIAL_SOURCE) || TESTIMONIAL_COPY.test(localText);
     const featureItems = stats.filter(isLikelyFeatureItem);
     const cardItems = stats.filter(isLikelyCardItem);
@@ -598,6 +640,7 @@ function detectGrids(ctx: RecipeContext): RecipeDraft[] {
         const signals = [
           `${cardLikeItems.length} repeated ${testimonialContext ? "testimonial/gallery" : "media/gallery"} items`,
           galleryContext ? "source attributes/classes identify a gallery or carousel track" : "",
+          catalogLightbox ? `pattern catalog identifies a ${catalogLightbox.id} lightbox gallery` : "",
           testimonialContext ? "source text/classes identify a testimonial or horizontal story strip" : "",
           oneRowRegimes >= 2 ? "items remain in a horizontal gallery row across sampled widths" : "",
           mediaRatio >= 0.6 ? "most gallery items include media" : "",
@@ -619,9 +662,13 @@ function detectGrids(ctx: RecipeContext): RecipeDraft[] {
     const productItems = stats.filter(isLikelyProductItem);
     const forbiddenProductContext = subtreeAttrOrSourceMatches(parent, /\b(?:footer|directory|nav|menu)\b/i)
       || (!rootTooBroad && subtreeAttrOrSourceMatches(rootInfo.root, /\b(?:footer|directory|nav|menu)\b/i));
+    // Page-level catalog prior: a Shopify/WooCommerce page makes repeated card
+    // grids product grids even when per-node class names carry no commerce words.
+    const catalogCommerce = ctx.pageFlags.has("ecommerce") || ctx.pageFlags.has("platform_shopify");
     const productContext = !forbiddenProductContext &&
       (PRODUCT_COPY.test(localText) || subtreeAttrOrSourceMatches(parent, PRODUCT_SOURCE)
-        || (!rootTooBroad && (PRODUCT_COPY.test(parentText) || subtreeAttrOrSourceMatches(rootInfo.root, PRODUCT_SOURCE))));
+        || (!rootTooBroad && (PRODUCT_COPY.test(parentText) || subtreeAttrOrSourceMatches(rootInfo.root, PRODUCT_SOURCE)))
+        || catalogCommerce);
     const productStats = productItems.length >= 2 ? productItems : (productContext ? cardLikeItems : []);
     if (productStats.length >= 2 && productStats.length / kids.length >= 0.45 && productContext) {
       const key = itemSetKey("product-grid", productStats);
@@ -635,6 +682,7 @@ function detectGrids(ctx: RecipeContext): RecipeDraft[] {
           productCopyRatio >= 0.5 ? "most items contain commerce/product copy" : "",
           ctaRatio >= 0.5 ? "most products include link/button affordances" : "",
           (subtreeAttrOrSourceMatches(parent, PRODUCT_SOURCE) || (!rootTooBroad && subtreeAttrOrSourceMatches(rootInfo.root, PRODUCT_SOURCE))) ? "source context is product/promo/commerce-like" : "",
+          catalogCommerce ? "pattern catalog identifies an e-commerce platform page" : "",
         ].filter(Boolean);
         const confidence = 0.58
           + Math.min(0.14, productStats.length * 0.025)
@@ -642,7 +690,8 @@ function detectGrids(ctx: RecipeContext): RecipeDraft[] {
           + (layout ? 0.10 : 0)
           + (productCopyRatio >= 0.5 ? 0.07 : 0)
           + (ctaRatio >= 0.5 ? 0.05 : 0)
-          + ((subtreeAttrOrSourceMatches(parent, PRODUCT_SOURCE) || (!rootTooBroad && subtreeAttrOrSourceMatches(rootInfo.root, PRODUCT_SOURCE))) ? 0.06 : 0);
+          + ((subtreeAttrOrSourceMatches(parent, PRODUCT_SOURCE) || (!rootTooBroad && subtreeAttrOrSourceMatches(rootInfo.root, PRODUCT_SOURCE))) ? 0.06 : 0)
+          + (catalogCommerce ? 0.05 : 0);
         out.push(baseDraft(ctx, "product-grid", parent, productStats, confidence, signals));
       }
       continue;
@@ -832,8 +881,8 @@ function candidateSort(ctx: RecipeContext, a: RecipeDraft, b: RecipeDraft): numb
     || b.confidence - a.confidence;
 }
 
-export function buildRecipeReport(ir: IR, sections: Section[], primitives: Map<string, PrimitiveType>): RecipeReport {
-  const ctx = buildContext(ir, sections, primitives);
+export function buildRecipeReport(ir: IR, sections: Section[], primitives: Map<string, PrimitiveType>, patternHints?: PatternHints): RecipeReport {
+  const ctx = buildContext(ir, sections, primitives, patternHints);
   const drafts = suppressDuplicates(ctx, [
     ...detectLogoClouds(ctx),
     ...detectGrids(ctx),
@@ -853,6 +902,7 @@ export function buildRecipeReport(ir: IR, sections: Section[], primitives: Map<s
       highConfidence: candidates.filter((c) => c.confidence >= 0.82).length,
       byKind,
       templateReadyKinds: TEMPLATE_READY,
+      ...(patternHints ? { catalogPatterns: patternHints.matches.map((m) => m.id) } : {}),
     },
     candidates,
   };
@@ -880,6 +930,7 @@ export function recipeReportToMarkdown(report: RecipeReport): string {
   lines.push("");
   lines.push(`- Candidates: ${report.summary.totalCandidates}`);
   lines.push(`- High confidence: ${report.summary.highConfidence}`);
+  if (report.summary.catalogPatterns?.length) lines.push(`- Catalog patterns on page: ${report.summary.catalogPatterns.join(", ")}`);
   lines.push(`- By kind: ${Object.entries(report.summary.byKind).map(([k, v]) => `${k} ${v}`).join(", ") || "none"}`);
   lines.push("");
   lines.push("## Candidates");

compiler/src/knowledge/patternIndex.ts

@@ -0,0 +1,206 @@
+/**
+ * Pattern index: O(1) signature lookup over the frozen pattern catalog
+ * (data/pattern-catalog.json). Matches known widget/platform/animation
+ * signatures against the IR's diagnostic evidence (srcClass, tags, attrs)
+ * and produces deterministic PatternHints consumed as a generation artifact
+ * (patterns.json) and as an ADDITIVE evidence source for recipe recognition.
+ *
+ * Determinism contract: the catalog is FROZEN data pinned by sha256
+ * (data/pattern-catalog.lock). Same catalog + same IR => byte-identical hints.
+ * There is no learning layer here — hints are catalog-only by construction.
+ * The pin is UNCONDITIONAL: a catalog/lock mismatch (or a missing lock) always
+ * throws, so pinned evidence can never drift silently.
+ */
+import { createHash } from "node:crypto";
+import { readFileSync, writeFileSync, existsSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import type { IR, IRNode, IRChild } from "../normalize/ir.js";
+
+export type PatternMatchSpec = {
+  /** exact class-token equality (lowercase) */
+  classTokens?: string[];
+  /** class-token prefix, e.g. "elementor-", "wp-block-" */
+  classPrefixes?: string[];
+  /** element tag names, e.g. custom elements like "lottie-player" */
+  tags?: string[];
+  /** attribute presence, e.g. "data-aos" */
+  attrNames?: string[];
+  /** id-attribute prefix, e.g. "shopify-section" */
+  idPrefixes?: string[];
+};
+
+export type PatternDef = {
+  id: string;
+  kind: string;
+  flags: string[];
+  match: PatternMatchSpec;
+};
+
+export type PatternCatalog = {
+  version: number;
+  description?: string;
+  patterns: PatternDef[];
+};
+
+export type PatternMatch = {
+  id: string;
+  kind: string;
+  flags: string[];
+  /** how many IR nodes matched at least one signature of this pattern */
+  count: number;
+  /** first few matching node ids, pre-order (bounded sample for diagnostics) */
+  cids: string[];
+};
+
+export type PatternHints = {
+  catalogVersion: number;
+  catalogHash: string;
+  /** matched patterns, sorted by id for determinism */
+  matches: PatternMatch[];
+  /** union of flags across matches, sorted */
+  flags: string[];
+  /** platform_* flags with the prefix stripped, sorted (e.g. ["elementor","wordpress"]) */
+  platforms: string[];
+  /** no deferred-interactive / motion-lib / counter / nav-toggle signatures and a small tree —
+   *  callers may skip optional capture/inference stages for such pages */
+  simpleStatic: boolean;
+};
+
+const CATALOG_PATH = fileURLToPath(new URL("../../data/pattern-catalog.json", import.meta.url));
+const LOCK_PATH = fileURLToPath(new URL("../../data/pattern-catalog.lock", import.meta.url));
+const SAMPLE_CIDS = 5;
+/** simpleStatic requires the whole tree under this node count (matches "small landing page"). */
+const SIMPLE_STATIC_MAX_NODES = 1500;
+const SIMPLE_STATIC_BLOCKERS = ["deferred_interactive", "motion_lib", "counter", "nav_toggle"];
+
+type CompiledIndex = {
+  catalog: PatternCatalog;
+  hash: string;
+  byClassToken: Map<string, PatternDef[]>;
+  classPrefixes: Array<[string, PatternDef]>;
+  byTag: Map<string, PatternDef[]>;
+  byAttrName: Map<string, PatternDef[]>;
+  idPrefixes: Array<[string, PatternDef]>;
+};
+
+let cached: CompiledIndex | null = null;
+
+function addTo<K>(map: Map<K, PatternDef[]>, key: K, def: PatternDef): void {
+  const list = map.get(key);
+  if (list) list.push(def);
+  else map.set(key, [def]);
+}
+
+export function loadPatternIndex(): CompiledIndex {
+  if (cached) return cached;
+  const raw = readFileSync(CATALOG_PATH, "utf8");
+  const hash = createHash("sha256").update(raw).digest("hex");
+  const catalog = JSON.parse(raw) as PatternCatalog;
+  if (!Array.isArray(catalog.patterns)) throw new Error("pattern catalog: missing patterns[]");
+  const idx: CompiledIndex = {
+    catalog,
+    hash,
+    byClassToken: new Map(),
+    classPrefixes: [],
+    byTag: new Map(),
+    byAttrName: new Map(),
+    idPrefixes: [],
+  };
+  for (const p of catalog.patterns) {
+    for (const t of p.match.classTokens ?? []) addTo(idx.byClassToken, t.toLowerCase(), p);
+    for (const pre of p.match.classPrefixes ?? []) idx.classPrefixes.push([pre.toLowerCase(), p]);
+    for (const t of p.match.tags ?? []) addTo(idx.byTag, t.toLowerCase(), p);
+    for (const a of p.match.attrNames ?? []) addTo(idx.byAttrName, a.toLowerCase(), p);
+    for (const pre of p.match.idPrefixes ?? []) idx.idPrefixes.push([pre, p]);
+  }
+  cached = idx;
+  return idx;
+}
+
+/** Enforce the frozen-catalog pin. UNCONDITIONAL: a missing lock or a hash
+ *  mismatch always throws — pinned evidence must never drift silently, so the
+ *  generator refuses to run against an unpinned/edited catalog. Regenerate the
+ *  lock deliberately after a catalog edit with `--write-lock`. */
+export function assertPinnedCatalog(): void {
+  const idx = loadPatternIndex();
+  if (!existsSync(LOCK_PATH)) {
+    throw new Error("pattern catalog lock missing (data/pattern-catalog.lock)");
+  }
+  const pinned = readFileSync(LOCK_PATH, "utf8").trim();
+  if (pinned !== idx.hash) {
+    throw new Error(
+      `pattern catalog hash mismatch: pinned ${pinned.slice(0, 12)}… actual ${idx.hash.slice(0, 12)}…`,
+    );
+  }
+}
+
+function isElement(c: IRChild): c is IRNode {
+  return (c as IRNode).id !== undefined;
+}
+
+/** Match ONE node's own evidence (srcClass tokens, tag, attr names, id prefix)
+ *  against the catalog. Shared by the page-level hint scan and per-candidate
+ *  recipe scoring. Returns matched defs, deduped, in catalog order. */
+export function matchCatalogNode(node: Pick<IRNode, "tag" | "attrs" | "srcClass">): PatternDef[] {
+  const idx = loadPatternIndex();
+  const hits = new Set<PatternDef>();
+  if (node.srcClass) {
+    for (const tok of node.srcClass.toLowerCase().split(/\s+/)) {
+      if (!tok) continue;
+      for (const def of idx.byClassToken.get(tok) ?? []) hits.add(def);
+      for (const [pre, def] of idx.classPrefixes) if (tok.startsWith(pre)) hits.add(def);
+    }
+  }
+  for (const def of idx.byTag.get(node.tag.toLowerCase()) ?? []) hits.add(def);
+  for (const attr of Object.keys(node.attrs)) {
+    for (const def of idx.byAttrName.get(attr.toLowerCase()) ?? []) hits.add(def);
+  }
+  const id = node.attrs.id;
+  if (id) for (const [pre, def] of idx.idPrefixes) if (id.startsWith(pre)) hits.add(def);
+  return idx.catalog.patterns.filter((p) => hits.has(p));
+}
+
+/** Single deterministic pre-order walk of the IR: tokenize srcClass, check tag /
+ *  attr / id signatures, accumulate per-pattern counts + a bounded cid sample.
+ *  Asserts the frozen-catalog pin first (throws on mismatch). */
+export function resolvePatternHints(ir: IR): PatternHints {
+  const idx = loadPatternIndex();
+  assertPinnedCatalog();
+
+  const counts = new Map<string, { def: PatternDef; count: number; cids: string[] }>();
+  const hit = (def: PatternDef, cid: string, seen: Set<string>) => {
+    if (seen.has(def.id)) return; // one hit per node per pattern
+    seen.add(def.id);
+    let e = counts.get(def.id);
+    if (!e) { e = { def, count: 0, cids: [] }; counts.set(def.id, e); }
+    e.count++;
+    if (e.cids.length < SAMPLE_CIDS) e.cids.push(cid);
+  };
+
+  const visit = (node: IRNode) => {
+    const seen = new Set<string>();
+    for (const def of matchCatalogNode(node)) hit(def, node.id, seen);
+    for (const c of node.children) if (isElement(c)) visit(c);
+  };
+  visit(ir.root);
+
+  const matches: PatternMatch[] = [...counts.values()]
+    .map((e) => ({ id: e.def.id, kind: e.def.kind, flags: e.def.flags, count: e.count, cids: e.cids }))
+    .sort((a, b) => a.id.localeCompare(b.id));
+  const flags = [...new Set(matches.flatMap((m) => m.flags))].sort();
+  const platforms = flags
+    .filter((f) => f.startsWith("platform_"))
+    .map((f) => f.slice("platform_".length))
+    .sort();
+  const simpleStatic =
+    ir.doc.nodeCount < SIMPLE_STATIC_MAX_NODES && !flags.some((f) => SIMPLE_STATIC_BLOCKERS.includes(f));
+
+  return { catalogVersion: idx.catalog.version, catalogHash: idx.hash, matches, flags, platforms, simpleStatic };
+}
+
+// `--write-lock` maintenance entry: refresh the pin after a deliberate catalog edit.
+if (process.argv[1] && import.meta.url === new URL(`file://${process.argv[1]}`).href && process.argv.includes("--write-lock")) {
+  const idx = loadPatternIndex();
+  writeFileSync(LOCK_PATH, idx.hash + "\n");
+  console.log("pinned pattern catalog:", idx.hash);
+}

compiler/src/site/generateSite.ts

@@ -12,6 +12,7 @@ import { join } from "node:path";
 import { rmSync } from "node:fs";
 import { writeText, readJSON, fileExists } from "../util/fsx.js";
 import { generateCss, RESET_CSS } from "../generate/css.js";
+import { generatePreviewHtml } from "../generate/preview.js";
 import { generateInteractionCss } from "../generate/interactionCss.js";
 import { buildRuntimeSpecs, wiresJsx, dittoWireImportPath, DITTO_WIRE_TSX, interactionRejectedSet } from "../generate/interactive.js";
 import { buildLottieSpec, lottieHasContent, lottieWireJsx, dittoLottieImportPath, DITTO_LOTTIE_TSX } from "../generate/lottie.js";
@@ -454,6 +455,22 @@ export function generateSiteApp(opts: {
     const globals = globalsCss(entry, unionFontCss(routes), palette.css);
     writeText(join(appDir, "src", isVite ? "globals.css" : join("app", "globals.css")), isVite ? viteGlobalsCss(globals) : globals);
   }
+  // Static preview of the ENTRY page only (the product moment — the first page shown
+  // within seconds of generate, before the Next build + deploy completes). Runtime-free
+  // single HTML file over the entry IR, sharing the same css.ts rule collectors +
+  // propsList/resolveTag decisions as the app. Assets relative to public/.
+  const previewTokensCss = tw
+    ? palette.css + "\n" + tokensToCss(entry.tokens, true) + (interner.defs.size ? "\n" + colorDefsCssOf(interner) : "")
+    : palette.css + "\n" + tokensToCss(entry.tokens, true);
+  writeText(join(appDir, "preview.html"), generatePreviewHtml({
+    ir: entry.ir,
+    assetMap: buildAssetMap(entry.assetGraph),
+    fontGraph: { entries: entry.fontGraph.entries, css: unionFontCss(routes) },
+    tokensCss: previewTokensCss,
+    sourceUrl: entry.ir.doc.sourceUrl,
+    colorVar: palette.varForColor,
+  }));
+
   emitGeneratedDocs(appDir, {
     sourceUrl: entry.ir.doc.sourceUrl,
     routes: seoRoutes,

compiler/src/util/captureFailure.ts

@@ -0,0 +1,73 @@
+/** Capture-side fast-fail helpers (Item 3).
+ *
+ *  Two concerns share this module because both are pure, testable predicates the
+ *  capture flow keys off:
+ *
+ *   1. Wall-text detection — the SAME signature set the validator's pollution gate
+ *      uses (validate/gates.ts imports WALL_RE from here). Extracted so the two
+ *      judgments — capture-side abort and validator-side grade — can never drift.
+ *      The pollution gate remains the AUTHORITY on whether a shipped capture is
+ *      polluted; this module only lets capture bail early on an obvious wall
+ *      instead of burning the full multi-viewport pass on garbage.
+ *
+ *   2. Nav-failure classification — decides whether a navigation/session error is
+ *      worth ONE fresh-context retry (transient: the browser/page died, a socket
+ *      reset, a nav timeout) versus terminal (a wall, a hard DNS/cert failure that
+ *      a retry cannot fix). Pure string classification so it unit-tests without a
+ *      browser.
+ */
+
+/** Bot/egress/auth-wall text signatures. One regex, shared with the pollution gate
+ *  (validate/gates.ts) so capture-abort and validator-grade use identical fingerprints. */
+export const WALL_RE =
+  /blocked by egress|access denied|access to this page has been denied|are you a (human|robot)|verify you are human|enable javascript to|please enable javascript|checking your browser|just a moment|attention required|request blocked|why have i been blocked|captcha|cf-browser-verification|ddos protection by/i;
+
+export function isWallText(text: string): boolean {
+  return WALL_RE.test(text);
+}
+
+/** Node-count ceiling under which wall text is treated as a genuine interstitial
+ *  rather than an incidental mention on a real page. Matches the pollution gate's
+ *  `wall && nodeCount < 220` threshold so the two agree on the same boundary. */
+export const WALL_MAX_NODES = 220;
+
+export type WallProbe = { text: string; nodes: number };
+
+/** Capture-side wall verdict: the page is a bot/auth wall worth aborting on iff it
+ *  is BOTH small (few nodes) AND carries wall text — identical to the gate's rule.
+ *  A large page that merely mentions "captcha" in body copy is NOT a wall. */
+export function isBotWall(probe: WallProbe | null | undefined): boolean {
+  if (!probe) return false;
+  return probe.nodes < WALL_MAX_NODES && isWallText(probe.text);
+}
+
+export type NavFailureClass = "retryable" | "wall" | "terminal";
+
+/** Classify a navigation/session failure by its error text.
+ *
+ *  - "wall"      → a bot/auth interstitial; a retry with a fresh context won't help
+ *                  and the caller should surface it as a pollution-style abort.
+ *  - "retryable" → the browser/page/context died, a transient socket/timeout/reset;
+ *                  ONE fresh-context retry is worthwhile.
+ *  - "terminal"  → a hard failure a retry cannot change (DNS, cert, refused, unknown).
+ *
+ *  Ordering matters: a wall signature wins over a transient one (a wall served over
+ *  a reset connection is still a wall). */
+export function classifyNavFailure(error: unknown): NavFailureClass {
+  const msg = String((error as { message?: string })?.message ?? error ?? "");
+  if (WALL_RE.test(msg)) return "wall";
+  // Session death / crash / transient network — a fresh context can recover these.
+  if (
+    /Target (page, context or browser|closed)|context or browser has been closed|page(?:,)? .*has been closed|browser has been closed|page closed|has crashed|Navigation .*interrupted|net::ERR_(?:CONNECTION_RESET|CONNECTION_CLOSED|TIMED_OUT|ABORTED|EMPTY_RESPONSE|NETWORK_CHANGED|SOCKET_NOT_CONNECTED)|Timeout .*exceeded|Navigation timeout/i.test(
+      msg,
+    )
+  ) {
+    return "retryable";
+  }
+  return "terminal";
+}
+
+/** Whether a classified failure earns the single fresh-context retry. */
+export function isRetryableNavFailure(error: unknown): boolean {
+  return classifyNavFailure(error) === "retryable";
+}

compiler/src/util/envShim.ts

@@ -0,0 +1,103 @@
+/** Deterministic capture-environment shim (Stage 0, runs before ANY page script).
+ *
+ *  Two entropy sources make a page render differently on each load — Math.random
+ *  (shuffled carousels, random ids, A/B jitter) and the wall clock ("posted N
+ *  minutes ago", schedule/countdown logic). Seeding the first and pinning the
+ *  second makes a capture reproducible: the same site captured under the same
+ *  {seed, epoch} paints the same DOM.
+ *
+ *  CAUTIONS (all honored below):
+ *   - performance.now() is left REAL. Motion capture (marquee/rotator sampling in
+ *     capture/motion.ts) measures real velocities and observation windows off it;
+ *     pinning it would corrupt those measurements. Only the Date wall clock moves.
+ *   - The Date epoch is a PARAMETER, recorded in capture metadata — a recapture
+ *     uses a fresh-but-recorded value. Generation determinism only requires a
+ *     frozen capture to produce byte-stable output, which is unaffected by which
+ *     epoch was chosen (the epoch is frozen into the capture, not re-derived).
+ *   - The clock still ADVANCES from the pinned epoch (via the real-clock delta),
+ *     so elapsed-time logic (setTimeout-driven reveals, animation timing that
+ *     reads Date, lazy-load debounces) behaves — only the absolute origin is
+ *     pinned, not the passage of time.
+ *   - Date is patched consistently across constructor / Date.now() / getTime() /
+ *     valueOf() / Symbol.toPrimitive by shifting the underlying instant for BOTH
+ *     the no-arg constructor and Date.now(); every instance method then reads the
+ *     shifted instant through the native prototype, so cookie-banner / schedule
+ *     gates that call getTime()/valueOf() see the same pinned clock as now().
+ */
+
+/** Default fixed epoch: 2026-01-01T00:00:00.000Z. Callers should pass an explicit,
+ *  recorded epoch (see captureEpochMs); this is only the fallback. */
+export const DEFAULT_CAPTURE_EPOCH_MS = 1767225600000;
+
+/** Default PRNG seed (mulberry32 initial state). A non-zero constant so the first
+ *  draw is well-mixed; recorded alongside the epoch for reproducibility. */
+export const DEFAULT_PRNG_SEED = 0x9e3779b9;
+
+/** Resolve the epoch a capture run should pin to. Env override lets a recapture
+ *  reuse a recorded value; otherwise a fresh timestamp is taken at run start and
+ *  recorded in metadata. Determinism of GENERATION does not depend on this value —
+ *  only on the capture being frozen once chosen. */
+export function captureEpochMs(override?: number | string): number {
+  if (typeof override === "number" && Number.isFinite(override)) return override;
+  if (typeof override === "string" && override.trim()) {
+    const parsed = Number(override);
+    if (Number.isFinite(parsed)) return parsed;
+    const asDate = Date.parse(override);
+    if (Number.isFinite(asDate)) return asDate;
+  }
+  return DEFAULT_CAPTURE_EPOCH_MS;
+}
+
+/**
+ * Build the init-script SOURCE STRING injected via page.addInitScript before any
+ * page script runs. Returned as a raw string (not a function) so tsx/esbuild never
+ * transforms it — the browser receives exactly these bytes.
+ *
+ * Interpolation is numeric-only (Number.isFinite-guarded), so no string escaping /
+ * injection surface exists.
+ */
+export function buildDeterministicEnvShim(opts?: { seed?: number; epochMs?: number }): string {
+  const seed = Number.isFinite(opts?.seed) ? Math.trunc(opts!.seed!) : DEFAULT_PRNG_SEED;
+  const epoch = Number.isFinite(opts?.epochMs) ? Math.trunc(opts!.epochMs!) : DEFAULT_CAPTURE_EPOCH_MS;
+  // NOTE: `delta` is computed once at shim-eval time (the earliest possible moment,
+  // before page scripts) so the pinned origin is stable; the real clock then adds
+  // elapsed time on top, keeping relative time truthful.
+  return `(() => {
+  "use strict";
+  // ---- Seeded PRNG (mulberry32): deterministic, well-distributed, cheap ----
+  let __s = ${seed} | 0;
+  const __rand = function random() {
+    __s = (__s + 0x6d2b79f5) | 0;
+    let t = Math.imul(__s ^ (__s >>> 15), 1 | __s);
+    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
+    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
+  };
+  try { Object.defineProperty(Math, "random", { value: __rand, writable: true, configurable: true }); }
+  catch (e) { try { Math.random = __rand; } catch (e2) {} }
+
+  // ---- Pinned-but-advancing wall clock. performance.now() stays REAL. ----
+  const RealDate = Date;
+  const realNow = () => RealDate.now();
+  // Shift so the FIRST observed instant is the pinned epoch; real elapsed time is
+  // then added on top (delta is negative if the machine clock is ahead of epoch).
+  const delta = ${epoch} - realNow();
+  const shiftedNow = () => realNow() + delta;
+  function DittoDate(...args) {
+    // \`new Date()\` with no args => pinned clock; every other form is delegated to
+    // the native constructor unchanged (parsing a string, y/m/d, a millis value).
+    const inst = args.length === 0 ? new RealDate(shiftedNow()) : new RealDate(...args);
+    // Re-tag the prototype so instanceof + inherited getTime/valueOf/toISOString work.
+    Object.setPrototypeOf(inst, DittoDate.prototype);
+    return inst;
+  }
+  // Inherit the full native Date prototype (getTime, valueOf, getFullYear,
+  // toISOString, Symbol.toPrimitive, ...) so every read is consistent with now().
+  DittoDate.prototype = Object.create(RealDate.prototype);
+  DittoDate.prototype.constructor = DittoDate;
+  DittoDate.now = shiftedNow;
+  DittoDate.parse = RealDate.parse;
+  DittoDate.UTC = RealDate.UTC;
+  try { Object.defineProperty(globalThis, "Date", { value: DittoDate, writable: true, configurable: true }); }
+  catch (e) { try { globalThis.Date = DittoDate; } catch (e2) {} }
+})();`;
+}

compiler/src/validate/gates.ts

@@ -7,6 +7,7 @@ import type { AssetGraph } from "../infer/assets.js";
 import type { FontGraph } from "../infer/fonts.js";
 import type { Section } from "../infer/sections.js";
 import type { CaptureResult } from "../capture/capture.js";
+import { WALL_RE } from "../util/captureFailure.js";
 
 export type GateResult = {
   gate: string;
@@ -117,7 +118,8 @@ export function countVisibleInCaptureHiddenInClone(
 // page: an egress/bot wall, a near-empty shell, or a cookie/consent modal that was
 // never dismissed (the clone then reproduces the modal, so the perceptual gate is
 // fooled too). This gate flags those captures so a "perfect" score can't hide them.
-const WALL_RE = /blocked by egress|access denied|access to this page has been denied|are you a (human|robot)|verify you are human|enable javascript to|please enable javascript|checking your browser|just a moment|attention required|request blocked|why have i been blocked|captcha|cf-browser-verification|ddos protection by/i;
+// WALL_RE lives in util/captureFailure.ts — shared with the capture-side fast-fail so
+// the abort and the grade can never drift on what counts as a wall.
 
 export function gatePollution(ir: IR, capture: CaptureResult, viewports: number[]): GateResult {
   const issues: string[] = [];

compiler/test/captureFailure.test.ts

@@ -0,0 +1,117 @@
+import { describe, it } from "node:test";
+import assert from "node:assert/strict";
+import {
+  WALL_RE,
+  isWallText,
+  isBotWall,
+  WALL_MAX_NODES,
+  classifyNavFailure,
+  isRetryableNavFailure,
+} from "../src/util/captureFailure.js";
+
+// ---------------------------------------------------------------------------
+// Item 3: capture-side fast-fail predicates (pure — no browser).
+// ---------------------------------------------------------------------------
+
+describe("captureFailure: wall-text detection", () => {
+  it("matches common bot/auth-wall fingerprints", () => {
+    for (const t of [
+      "Just a moment...",
+      "Checking your browser before accessing",
+      "Please enable JavaScript to continue",
+      "Access to this page has been denied",
+      "Are you a human?",
+      "Verify you are human",
+      "Attention Required! | Cloudflare",
+      "Please complete the CAPTCHA",
+      "DDoS protection by Cloudflare",
+    ]) {
+      assert.ok(isWallText(t), `expected wall text to match: ${t}`);
+    }
+  });
+
+  it("does not match ordinary marketing/body copy", () => {
+    for (const t of [
+      "Welcome to our store — shop the new collection",
+      "Our team of humans is here to help you 24/7",
+      "Enable notifications to get the latest deals",
+      "About us · Careers · Contact",
+    ]) {
+      assert.equal(isWallText(t), false, `expected NOT to match: ${t}`);
+    }
+  });
+
+  it("WALL_RE is the same instance shared with the pollution gate (single source of truth)", () => {
+    // gates.ts imports WALL_RE from this module; assert the export is a real RegExp
+    // so a refactor that turns it into a function would fail here.
+    assert.ok(WALL_RE instanceof RegExp);
+  });
+});
+
+describe("captureFailure: isBotWall (matches the pollution gate's small+wall rule)", () => {
+  it("flags a small page with wall text", () => {
+    assert.ok(isBotWall({ text: "Just a moment...", nodes: 8 }));
+    assert.ok(isBotWall({ text: "checking your browser", nodes: WALL_MAX_NODES - 1 }));
+  });
+
+  it("does NOT flag a large page that merely mentions a wall phrase", () => {
+    // A real page can say "captcha" in its help docs — node count is the discriminator.
+    assert.equal(isBotWall({ text: "how our captcha works", nodes: WALL_MAX_NODES }), false);
+    assert.equal(isBotWall({ text: "how our captcha works", nodes: 5000 }), false);
+  });
+
+  it("does NOT flag a small page with no wall text", () => {
+    assert.equal(isBotWall({ text: "Home · About · Contact", nodes: 10 }), false);
+  });
+
+  it("is null-safe", () => {
+    assert.equal(isBotWall(null), false);
+    assert.equal(isBotWall(undefined), false);
+  });
+});
+
+describe("captureFailure: classifyNavFailure", () => {
+  it("classifies session-death / crash / transient network as retryable", () => {
+    for (const msg of [
+      "Target page, context or browser has been closed",
+      "Target closed",
+      "browser has been closed",
+      "page has crashed",
+      "net::ERR_CONNECTION_RESET at https://example.com",
+      "net::ERR_TIMED_OUT",
+      "Timeout 45000ms exceeded",
+      "Navigation timeout of 30000 ms exceeded",
+    ]) {
+      assert.equal(classifyNavFailure(new Error(msg)), "retryable", msg);
+      assert.equal(isRetryableNavFailure(new Error(msg)), true, msg);
+    }
+  });
+
+  it("classifies wall fingerprints as wall (not retryable — a fresh context can't help)", () => {
+    const e = new Error("navigation failed: just a moment... checking your browser");
+    assert.equal(classifyNavFailure(e), "wall");
+    assert.equal(isRetryableNavFailure(e), false);
+  });
+
+  it("classifies hard failures as terminal (not retryable)", () => {
+    for (const msg of [
+      "net::ERR_NAME_NOT_RESOLVED",
+      "net::ERR_CERT_AUTHORITY_INVALID",
+      "net::ERR_CONNECTION_REFUSED",
+      "something totally unexpected",
+    ]) {
+      assert.equal(classifyNavFailure(new Error(msg)), "terminal", msg);
+      assert.equal(isRetryableNavFailure(new Error(msg)), false, msg);
+    }
+  });
+
+  it("wall wins over a transient signature (a wall served over a reset is still a wall)", () => {
+    const e = new Error("net::ERR_CONNECTION_RESET — access denied");
+    assert.equal(classifyNavFailure(e), "wall");
+  });
+
+  it("accepts a bare string or non-Error value", () => {
+    assert.equal(classifyNavFailure("Target closed"), "retryable");
+    assert.equal(classifyNavFailure(undefined), "terminal");
+  });
+});

compiler/test/css.test.ts

@@ -566,6 +566,78 @@ describe("generateCss wrap-vulnerable single-line text", () => {
   });
 });
 
+// BUG C, icon+text chip variant — the label sits beside a replaced icon (<svg>), so the vulnerable
+// node is NOT a pure text leaf and the leaf-only guard skipped it. The chip's button ancestor bakes
+// a quantized px width that can land fractionally below the intrinsic single-line width, wrapping
+// the label ("Recreate a / screenshot"). The inner [icon, text] row must still earn nowrap: the icon
+// can't wrap, its constant width is already inside the probe's wMin/wMax, and only the text is at risk.
+describe("generateCss wrap-vulnerable icon+text chip", () => {
+  // Captured shape: pill button 193.44×32 (px 12 + 1px border per side) → inner row 167.44×20
+  // (icon 15 + gap 8 + text), line-height 20, wMin 94.88 < wMax 167.44 == avail == bbox.width.
+  function chipRow(iconTag: string) {
+    const szAt = (): RawSizing => ({ wAuto: true, wFill: true, hAuto: true, hFill: true, wMin: 94.88, wMax: 167.44 });
+    const iconPer = (): XPerVp => ({ cs: { display: "inline-block" }, bbox: { x: 13, y: 8.5, width: 15, height: 15 } });
+    const icon = xNode("n2", iconTag, { 375: iconPer(), 768: iconPer(), 1280: iconPer() });
+    const rowPer = (): XPerVp => ({ cs: { display: "flex", lineHeight: "20px" }, bbox: { x: 13, y: 6, width: 167.44, height: 20 }, sizing: szAt() });
+    const row = xNode("n1", "div", { 375: rowPer(), 768: rowPer(), 1280: rowPer() }, [icon, { text: "Recreate a screenshot" }]);
+    const btnPer = (): XPerVp => ({
+      cs: { display: "flex", cursor: "pointer", paddingLeft: "12px", paddingRight: "12px", borderLeftWidth: "1px", borderRightWidth: "1px", borderTopLeftRadius: "9999px", borderTopRightRadius: "9999px", lineHeight: "20px" },
+      bbox: { x: 0, y: 0, width: 193.44, height: 32 },
+    });
+    const btn = xNode("n0", "button", { 375: btnPer(), 768: btnPer(), 1280: btnPer() }, [row]);
+    return btn;
+  }
+
+  it("emits white-space:nowrap for a single-line [icon, text] row flush against its pill's content edge", () => {
+    const css = generateCss(xIr(chipRow("svg")), new Map());
+    assert.ok(baseRule(css, "n1").includes("white-space:nowrap"), `icon+text chip row should get nowrap, got: ${baseRule(css, "n1")}`);
+  });
+
+  it("does NOT emit nowrap when the sibling is a non-replaced element (it may carry its own text)", () => {
+    const css = generateCss(xIr(chipRow("span")), new Map());
+    assert.ok(!baseRule(css, "n1").includes("white-space:nowrap"), `non-replaced sibling must keep the leaf-only bail, got: ${baseRule(css, "n1")}`);
+  });
+});
+
+// A pill <button> whose captured width is CONSTANT across viewports (the label never changes) looks
+// authored-fixed to the button-width heuristic — but the sizing probe proved `width:auto` reproduces
+// the box AND it paints exactly at its own max-content width at every sample: the width is content,
+// not authored. Baking it invites the emitters' quantization (0.1px rounding / spacing-scale snap) to
+// land fractionally below the intrinsic single-line width and wrap the label; the width must be
+// dropped so the clone re-derives it intrinsically at every band.
+describe("generateCss content-fit button width (probe-proven auto beats the constant-width lock)", () => {
+  function pillBody(sizing?: () => RawSizing) {
+    const per = (): XPerVp => ({
+      cs: { display: "flex", cursor: "pointer", width: "144.188px", borderTopLeftRadius: "9999px", borderTopRightRadius: "9999px", lineHeight: "20px" },
+      bbox: { x: 0, y: 0, width: 144.19, height: 32 },
+      ...(sizing ? { sizing: sizing() } : {}),
+    });
+    const btn = xNode("n1", "button", { 375: per(), 768: per(), 1280: per() }, [{ text: "Clone LinkedIn" }]);
+    return xNode("n0", "body", {
+      375: { cs: { display: "flex" }, bbox: { x: 0, y: 0, width: 375, height: 32 } },
+      768: { cs: { display: "flex" }, bbox: { x: 0, y: 0, width: 768, height: 32 } },
+      1280: { cs: { display: "flex" }, bbox: { x: 0, y: 0, width: 1280, height: 32 } },
+    }, [btn]);
+  }
+
+  it("drops the width when the probe proves auto AND the button paints at its max-content everywhere", () => {
+    const sz = (): RawSizing => ({ wAuto: true, wFill: false, hAuto: true, hFill: false, wMin: 103.14, wMax: 144.19 });
+    const css = generateCss(xIr(pillBody(sz)), new Map());
+    assert.ok(!allRulesX(css, "n1").includes("width:144"), `content-fit pill width must be dropped, got: ${allRulesX(css, "n1")}`);
+  });
+
+  it("still bakes the width without probe evidence (no sizing data)", () => {
+    const css = generateCss(xIr(pillBody()), new Map());
+    assert.ok(allRulesX(css, "n1").includes("width:144"), `unproven button width must stay locked, got: ${allRulesX(css, "n1")}`);
+  });
+
+  it("still bakes the width when the probe proves it load-bearing (wAuto:false)", () => {
+    const sz = (): RawSizing => ({ wAuto: false, wFill: false, hAuto: true, hFill: false, wMin: 103.14, wMax: 144.19 });
+    const css = generateCss(xIr(pillBody(sz)), new Map());
+    assert.ok(allRulesX(css, "n1").includes("width:144"), `load-bearing button width must stay locked, got: ${allRulesX(css, "n1")}`);
+  });
+});
+
 // Cross-band transform identity — a node with a NON-identity transform at one band must emit the
 // explicit identity `transform:none` at the bands where the source is untransformed, so the
 // transform can't cascade across bands and freeze at a width the source left untransformed.

compiler/test/envShim.test.ts

@@ -0,0 +1,162 @@
+import { describe, it, before, after } from "node:test";
+import assert from "node:assert/strict";
+import { chromium, type Browser, type Page } from "playwright";
+import {
+  buildDeterministicEnvShim,
+  captureEpochMs,
+  DEFAULT_CAPTURE_EPOCH_MS,
+  DEFAULT_PRNG_SEED,
+} from "../src/util/envShim.js";
+
+const ESBUILD_SHIM =
+  "globalThis.__name = globalThis.__name || ((fn) => fn);" +
+  "globalThis.__defProp = globalThis.__defProp || Object.defineProperty;";
+
+// ---------------------------------------------------------------------------
+// Item 1: deterministic-env shim — pure epoch resolution + in-browser behavior.
+// ---------------------------------------------------------------------------
+
+describe("envShim: captureEpochMs resolution", () => {
+  it("defaults to the fixed epoch when no override is given", () => {
+    assert.equal(captureEpochMs(), DEFAULT_CAPTURE_EPOCH_MS);
+    assert.equal(captureEpochMs(undefined), DEFAULT_CAPTURE_EPOCH_MS);
+  });
+
+  it("passes a finite numeric override through unchanged", () => {
+    assert.equal(captureEpochMs(1234567890), 1234567890);
+  });
+
+  it("parses a numeric string and an ISO date string", () => {
+    assert.equal(captureEpochMs("1234567890"), 1234567890);
+    assert.equal(captureEpochMs("2020-01-01T00:00:00Z"), Date.parse("2020-01-01T00:00:00Z"));
+  });
+
+  it("falls back to the default for garbage input", () => {
+    assert.equal(captureEpochMs("not-a-date"), DEFAULT_CAPTURE_EPOCH_MS);
+    assert.equal(captureEpochMs(NaN), DEFAULT_CAPTURE_EPOCH_MS);
+  });
+});
+
+describe("envShim: buildDeterministicEnvShim source safety", () => {
+  it("interpolates only numeric literals (no injection surface)", () => {
+    const src = buildDeterministicEnvShim({ seed: 42, epochMs: 1000 });
+    assert.match(src, /let __s = 42 \| 0;/);
+    assert.match(src, /const delta = 1000 - realNow\(\);/);
+    // performance.now must remain untouched — the shim only patches Math.random + Date,
+    // never assigns to performance.now (motion.ts velocity sampling depends on the real one).
+    assert.equal(/performance\s*\.\s*now\s*=/.test(src), false);
+    assert.equal(/defineProperty\s*\(\s*performance/.test(src), false);
+  });
+
+  it("truncates non-integer seed/epoch and uses defaults for non-finite", () => {
+    const src = buildDeterministicEnvShim({ seed: 3.9, epochMs: 5.9 });
+    assert.match(src, /let __s = 3 \| 0;/);
+    assert.match(src, /const delta = 5 - realNow\(\);/);
+    const dflt = buildDeterministicEnvShim({ seed: NaN, epochMs: Infinity });
+    assert.match(dflt, new RegExp(`let __s = ${DEFAULT_PRNG_SEED} \\| 0;`));
+    assert.match(dflt, new RegExp(`const delta = ${DEFAULT_CAPTURE_EPOCH_MS} - realNow\\(\\);`));
+  });
+});
+
+const VW = 1280, VH = 800;
+
+describe("envShim: in-browser behavior", () => {
+  let browser: Browser;
+  before(async () => { browser = await chromium.launch(); });
+  after(async () => { await browser.close(); });
+
+  // Fresh page with the shim installed BEFORE any page script (via addInitScript),
+  // exactly as capture.ts wires it. We navigate to a data: URL rather than setContent
+  // so the document is CREATED via navigation — addInitScript fires on document
+  // creation, which setContent (a content swap on the existing about:blank) skips.
+  // The inline <script> then runs after the init scripts and samples the pinned env.
+  const loadWithShim = async (opts: { seed?: number; epochMs?: number }, bodyScript: string): Promise<Page> => {
+    const page = await browser.newPage();
+    await page.setViewportSize({ width: VW, height: VH });
+    await page.addInitScript(ESBUILD_SHIM);
+    await page.addInitScript(buildDeterministicEnvShim(opts));
+    const html = `<!doctype html><html><body><script>${bodyScript}</script></body></html>`;
+    await page.goto("data:text/html," + encodeURIComponent(html));
+    return page;
+  };
+
+  it("seeds Math.random reproducibly across two independent loads (same seed → same sequence)", async () => {
+    const script = "window.__draws = Array.from({length: 10}, () => Math.random());";
+    const p1 = await loadWithShim({ seed: 12345, epochMs: DEFAULT_CAPTURE_EPOCH_MS }, script);
+    const p2 = await loadWithShim({ seed: 12345, epochMs: DEFAULT_CAPTURE_EPOCH_MS }, script);
+    const [a, b] = await Promise.all([
+      p1.evaluate(() => (window as unknown as { __draws: number[] }).__draws),
+      p2.evaluate(() => (window as unknown as { __draws: number[] }).__draws),
+    ]);
+    assert.deepEqual(a, b, "two loads with the same seed produce identical Math.random sequences");
+    assert.ok(a.every((n) => n >= 0 && n < 1), "draws are in [0,1)");
+    // Not a constant stream — a broken PRNG returning the same value would also be
+    // "stable"; assert genuine variation so the test can't pass trivially.
+    assert.ok(new Set(a).size > 1, "the sequence varies");
+    await p1.close(); await p2.close();
+  });
+
+  it("a different seed yields a different sequence", async () => {
+    const script = "window.__draws = Array.from({length: 10}, () => Math.random());";
+    const p1 = await loadWithShim({ seed: 1, epochMs: DEFAULT_CAPTURE_EPOCH_MS }, script);
+    const p2 = await loadWithShim({ seed: 2, epochMs: DEFAULT_CAPTURE_EPOCH_MS }, script);
+    const [a, b] = await Promise.all([
+      p1.evaluate(() => (window as unknown as { __draws: number[] }).__draws),
+      p2.evaluate(() => (window as unknown as { __draws: number[] }).__draws),
+    ]);
+    assert.notDeepEqual(a, b);
+    await p1.close(); await p2.close();
+  });
+
+  it("pins the Date epoch consistently across constructor / now() / getTime() / valueOf() / toISOString()", async () => {
+    const epoch = Date.parse("2021-06-15T12:00:00Z");
+    const page = await loadWithShim(
+      { seed: 1, epochMs: epoch },
+      `window.__t = {
+         now: Date.now(),
+         ctorGetTime: new Date().getTime(),
+         ctorValueOf: new Date().valueOf(),
+         iso: new Date().toISOString(),
+       };`,
+    );
+    const t = await page.evaluate(() => (window as unknown as { __t: { now: number; ctorGetTime: number; ctorValueOf: number; iso: string } }).__t);
+    // All reads land at the pinned epoch (within a few ms of real elapsed time between them).
+    assert.ok(Math.abs(t.now - epoch) < 5000, `Date.now near epoch: ${t.now} vs ${epoch}`);
+    assert.ok(Math.abs(t.ctorGetTime - epoch) < 5000, "new Date().getTime() near epoch");
+    assert.ok(Math.abs(t.ctorValueOf - epoch) < 5000, "new Date().valueOf() near epoch");
+    assert.match(t.iso, /^2021-06-15T12:00:0/, `toISOString pinned: ${t.iso}`);
+    // now() and getTime() must agree (both read the same shifted instant).
+    assert.ok(Math.abs(t.now - t.ctorGetTime) < 5000, "now() and getTime() agree");
+    await page.close();
+  });
+
+  it("keeps the clock ADVANCING from the pinned epoch (timers still behave)", async () => {
+    const epoch = DEFAULT_CAPTURE_EPOCH_MS;
+    const page = await loadWithShim(
+      { seed: 1, epochMs: epoch },
+      `window.__adv = new Promise((res) => {
+         const t0 = Date.now();
+         setTimeout(() => res({ t0, t1: Date.now() }), 60);
+       });`,
+    );
+    const { t0, t1 } = await page.evaluate(() => (window as unknown as { __adv: Promise<{ t0: number; t1: number }> }).__adv);
+    assert.ok(t0 >= epoch - 5000 && t0 <= epoch + 5000, "start is pinned near epoch");
+    assert.ok(t1 > t0, "time advances across a real setTimeout delay");
+    await page.close();
+  });
+
+  it("leaves performance.now() REAL (motion sampling depends on it) and advancing", async () => {
+    const page = await loadWithShim(
+      { seed: 1, epochMs: DEFAULT_CAPTURE_EPOCH_MS },
+      `window.__perf = new Promise((res) => {
+         const p0 = performance.now();
+         setTimeout(() => res({ p0, p1: performance.now() }), 40);
+       });`,
+    );
+    const { p0, p1 } = await page.evaluate(() => (window as unknown as { __perf: Promise<{ p0: number; p1: number }> }).__perf);
+    // performance.now() is a real monotonic clock from navigation start — small, not the epoch.
+    assert.ok(p0 >= 0 && p0 < 60_000, `performance.now() is real (not pinned to epoch): ${p0}`);
+    assert.ok(p1 > p0, "performance.now() advances");
+    await page.close();
+  });
+});

compiler/test/lazySweep.test.ts

@@ -0,0 +1,85 @@
+import { describe, it, before, after } from "node:test";
+import assert from "node:assert/strict";
+import { chromium, type Browser, type Page } from "playwright";
+import { discoverLazyAssetsInPage } from "../src/capture/capture.js";
+
+const ESBUILD_SHIM =
+  "globalThis.__name = globalThis.__name || ((fn) => fn);" +
+  "globalThis.__defProp = globalThis.__defProp || Object.defineProperty;";
+
+const VW = 1280, VH = 800;
+const BASE = "https://example.com/page/";
+
+// ---------------------------------------------------------------------------
+// Item 2: extended lazy-asset discovery sweep (in-page discovery function).
+// ---------------------------------------------------------------------------
+describe("lazySweep: discoverLazyAssetsInPage", () => {
+  let browser: Browser;
+  before(async () => { browser = await chromium.launch(); });
+  after(async () => { await browser.close(); });
+
+  const discover = async (bodyHtml: string): Promise<string[]> => {
+    const page: Page = await browser.newPage();
+    await page.setViewportSize({ width: VW, height: VH });
+    await page.addInitScript(ESBUILD_SHIM);
+    // A <base> gives relative refs a stable absolute form to assert against.
+    await page.setContent(`<!doctype html><html><head><base href="${BASE}"></head><body>${bodyHtml}</body></html>`);
+    await page.evaluate(ESBUILD_SHIM);
+    const refs = await page.evaluate(discoverLazyAssetsInPage);
+    await page.close();
+    return refs;
+  };
+
+  it("discovers img/source src + srcset inside <noscript> fallback markup", async () => {
+    const refs = await discover(`
+      <noscript>
+        <img src="hero.jpg" srcset="hero-2x.jpg 2x, hero-3x.jpg 3x">
+        <picture><source srcset="alt.webp 1x, alt-2x.webp 2x"></picture>
+      </noscript>
+    `);
+    assert.ok(refs.includes(BASE + "hero.jpg"), "noscript img src");
+    assert.ok(refs.includes(BASE + "hero-2x.jpg"), "first srcset variant from noscript img");
+    assert.ok(refs.includes(BASE + "alt.webp"), "first srcset variant from noscript source");
+  });
+
+  it("discovers url(...) values from an element's inline style attribute", async () => {
+    const refs = await discover(`
+      <div style="background-image: url('bg.png'); color: red"></div>
+      <span style='background: url("sprite.svg") no-repeat'></span>
+    `);
+    assert.ok(refs.includes(BASE + "bg.png"), "inline background-image url()");
+    assert.ok(refs.includes(BASE + "sprite.svg"), "inline background shorthand url()");
+  });
+
+  it("discovers data-background / data-background-image (raw URL and url(...) forms)", async () => {
+    const refs = await discover(`
+      <div data-background="lazybg.jpg"></div>
+      <div data-background-image="url('lazybg2.png')"></div>
+    `);
+    assert.ok(refs.includes(BASE + "lazybg.jpg"), "raw data-background URL");
+    assert.ok(refs.includes(BASE + "lazybg2.png"), "url()-wrapped data-background-image");
+  });
+
+  it("discovers the resolved src of an img[loading=lazy]", async () => {
+    const refs = await discover(`<img loading="lazy" src="belowfold.jpg">`);
+    assert.ok(refs.includes(BASE + "belowfold.jpg"));
+  });
+
+  it("drops data: URIs and dedupes + sorts", async () => {
+    const refs = await discover(`
+      <div style="background: url('dup.png')"></div>
+      <div data-background="dup.png"></div>
+      <img loading="lazy" src="data:image/gif;base64,R0lGOD">
+    `);
+    assert.equal(refs.filter((u) => u.endsWith("dup.png")).length, 1, "deduped across channels");
+    assert.equal(refs.some((u) => u.startsWith("data:")), false, "data: URIs dropped");
+    assert.deepEqual(refs, [...refs].sort(), "sorted");
+  });
+
+  it("returns nothing for a page with no lazy references", async () => {
+    const refs = await discover(`<div><p>hello</p><img src="eager.jpg"></div>`);
+    // The eager <img src> is the walker's job, not this sweep — the sweep only harvests
+    // the channels the walker misses.
+    assert.deepEqual(refs, []);
+  });
+});

compiler/test/patternCatalog.test.ts

@@ -0,0 +1,150 @@
+import { describe, it, afterEach } from "node:test";
+import assert from "node:assert/strict";
+import { readFileSync, writeFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import {
+  loadPatternIndex,
+  assertPinnedCatalog,
+  resolvePatternHints,
+  matchCatalogNode,
+} from "../src/knowledge/patternIndex.js";
+import { planForFrameUrl } from "../src/capture/graft.js";
+import type { IR, IRNode, IRChild } from "../src/normalize/ir.js";
+
+const CW = 1280;
+const LOCK_PATH = fileURLToPath(new URL("../data/pattern-catalog.lock", import.meta.url));
+
+/** Element node at the canonical viewport (ids assigned in pre-order by `page`). */
+function el(
+  tag: string,
+  opts: { srcClass?: string; attrs?: Record<string, string>; children?: IRChild[] } = {},
+): IRNode {
+  return {
+    id: "",
+    tag,
+    attrs: opts.attrs ?? {},
+    srcClass: opts.srcClass,
+    visibleByVp: { [CW]: true },
+    bboxByVp: { [CW]: { x: 0, y: 0, width: CW, height: 100 } },
+    computedByVp: { [CW]: { display: "block" } },
+    children: opts.children ?? [],
+  };
+}
+
+/** Wrap children in a <body> root and assign stable pre-order ids (n0, n1, …). */
+function page(children: IRNode[]): IR {
+  const root = el("body", { children });
+  let i = 0;
+  const assign = (n: IRNode): void => {
+    n.id = `n${i++}`;
+    for (const c of n.children) if ((c as IRNode).tag) assign(c as IRNode);
+  };
+  assign(root);
+  return {
+    doc: {
+      sourceUrl: "https://example.test/", title: "Fixture", lang: "en", charset: "UTF-8",
+      metaViewport: "width=device-width, initial-scale=1",
+      viewports: [CW], sampleViewports: [CW], canonicalViewport: CW,
+      perViewport: { [CW]: { scrollHeight: 100, scrollWidth: CW, htmlBg: "", bodyBg: "", bodyColor: "", bodyFont: "" } },
+      nodeCount: i, keyframes: [],
+    },
+    root,
+  };
+}
+
+describe("pattern catalog: load + pin", () => {
+  it("loads the frozen catalog and pins by sha256 (lock verifies)", () => {
+    const idx = loadPatternIndex();
+    assert.equal(idx.catalog.version, 1);
+    assert.ok(idx.catalog.patterns.length > 0, "catalog has patterns");
+    // The on-disk lock must equal the catalog's live hash — no throw.
+    assert.doesNotThrow(() => assertPinnedCatalog());
+    const pinned = readFileSync(LOCK_PATH, "utf8").trim();
+    assert.equal(pinned, idx.hash, "lock matches catalog hash");
+  });
+});
+
+describe("pattern catalog: integrity check throws unconditionally", () => {
+  const original = readFileSync(LOCK_PATH, "utf8");
+  afterEach(() => {
+    // Always restore the real lock so later tests / runs see the pinned hash.
+    writeFileSync(LOCK_PATH, original);
+  });
+
+  it("throws on a lock/catalog hash mismatch (no env-var escape hatch)", () => {
+    writeFileSync(LOCK_PATH, "deadbeef".repeat(8) + "\n");
+    assert.throws(() => assertPinnedCatalog(), /hash mismatch/);
+    // Restoring must make it pass again.
+    writeFileSync(LOCK_PATH, original);
+    assert.doesNotThrow(() => assertPinnedCatalog());
+  });
+});
+
+describe("pattern catalog: fingerprint fixtures hit", () => {
+  it("matchCatalogNode identifies a generic carousel fingerprint by class token", () => {
+    const hits = matchCatalogNode({ tag: "div", attrs: {}, srcClass: "swiper swiper-wrapper" });
+    assert.deepEqual(hits.map((h) => h.id), ["carousel_swiper"]);
+    assert.equal(hits[0].kind, "carousel");
+  });
+
+  it("matchCatalogNode identifies a platform fingerprint by class prefix", () => {
+    const hits = matchCatalogNode({ tag: "div", attrs: {}, srcClass: "elementor-widget-container" });
+    assert.ok(hits.some((h) => h.id === "platform_elementor"), "elementor prefix hit");
+  });
+
+  it("matchCatalogNode identifies a scroll-animation fingerprint by attribute presence", () => {
+    const hits = matchCatalogNode({ tag: "div", attrs: { "data-aos": "fade-up" }, srcClass: undefined });
+    assert.ok(hits.some((h) => h.id === "anim_aos"), "data-aos attr hit");
+  });
+
+  it("resolvePatternHints walks the IR deterministically and records id + cid evidence", () => {
+    const ir = page([
+      el("div", { srcClass: "swiper", children: [el("div", { srcClass: "swiper-slide" })] }),
+      el("div", { srcClass: "swiper-slide" }),
+    ]);
+    const hints = resolvePatternHints(ir);
+    const swiper = hints.matches.find((m) => m.id === "carousel_swiper");
+    assert.ok(swiper, "swiper detected");
+    // Three nodes carried a swiper token → count 3, cids are pre-order node ids.
+    assert.equal(swiper!.count, 3);
+    assert.deepEqual(swiper!.cids, ["n1", "n2", "n3"]);
+    // matches are sorted by id → deterministic evidence ordering.
+    const ids = hints.matches.map((m) => m.id);
+    assert.deepEqual(ids, [...ids].sort((a, b) => a.localeCompare(b)));
+    // Same catalog + same IR ⇒ byte-identical hints.
+    assert.deepEqual(resolvePatternHints(page([
+      el("div", { srcClass: "swiper", children: [el("div", { srcClass: "swiper-slide" })] }),
+      el("div", { srcClass: "swiper-slide" }),
+    ])), hints);
+  });
+
+  it("resolvePatternHints exposes platform flags (stripped) and simpleStatic", () => {
+    const ir = page([el("section", { srcClass: "shopify-section" })]);
+    const hints = resolvePatternHints(ir);
+    assert.ok(hints.platforms.includes("shopify"), "shopify platform surfaced");
+    assert.ok(hints.flags.includes("platform_shopify"));
+  });
+});
+
+describe("popup-vendor skip list: FRAME_SKIP semantics preserved (single source of truth)", () => {
+  // The catalog's consent/chat entries are DOM class/id fingerprints; the capture
+  // pipeline's popup-vendor skip list (graft.ts FRAME_SKIP_RE) matches iframe host
+  // URLs. They are orthogonal axes — the catalog carries no URL hosts, so there is
+  // nothing to consolidate; capture's list stays the single source of truth for
+  // frame-graft decisions. Assert its semantics are unchanged.
+  it("skips promo/consent creative iframe hosts", () => {
+    assert.equal(planForFrameUrl("https://widget.privy.com/assets/popup.html"), "skip");
+    assert.equal(planForFrameUrl("https://app.recart.com/creative"), "skip");
+    assert.equal(planForFrameUrl("https://www.googletagmanager.com/ns.html"), "skip");
+  });
+
+  it("still grafts inline form embeds and same-origin blank frames", () => {
+    assert.equal(planForFrameUrl("https://static-forms.klaviyo.com/form"), "graft");
+    assert.equal(planForFrameUrl("about:blank"), "graft");
+    assert.equal(planForFrameUrl(""), "graft");
+  });
+
+  it("still renders media players as stills", () => {
+    assert.equal(planForFrameUrl("https://www.youtube.com/embed/abc"), "still");
+  });
+});

compiler/test/preview.test.ts

@@ -0,0 +1,137 @@
+import { describe, it } from "node:test";
+import assert from "node:assert/strict";
+import type { IR, IRNode, IRChild, StyleMap, BBox } from "../src/normalize/ir.js";
+import type { FontGraph } from "../src/infer/fonts.js";
+import { generatePreviewHtml } from "../src/generate/preview.js";
+import { generateCss, collectNodeRules, assembleCss, computeBands } from "../src/generate/css.js";
+
+const VPS = [375, 1280];
+const CANONICAL = 1280;
+
+function computed(over: StyleMap = {}): StyleMap {
+  return { display: "block", position: "static", visibility: "visible", listStyleType: "disc", listStylePosition: "outside", ...over };
+}
+
+function node(id: string, tag: string, cs: StyleMap, children: IRChild[] = [], attrs: Record<string, string> = {}): IRNode {
+  const computedByVp: Record<number, StyleMap> = {};
+  const bboxByVp: Record<number, BBox> = {};
+  const visibleByVp: Record<number, boolean> = {};
+  for (const vp of VPS) {
+    computedByVp[vp] = { ...cs };
+    bboxByVp[vp] = { x: 0, y: 0, width: vp, height: 100 };
+    visibleByVp[vp] = true;
+  }
+  return { id, tag, attrs, visibleByVp, bboxByVp, computedByVp, children };
+}
+
+function irWith(root: IRNode): IR {
+  return {
+    doc: {
+      sourceUrl: "https://example.test/preview",
+      title: "Preview Fixture",
+      lang: "en",
+      charset: "UTF-8",
+      metaViewport: "width=device-width, initial-scale=1",
+      viewports: VPS,
+      sampleViewports: VPS,
+      canonicalViewport: CANONICAL,
+      perViewport: Object.fromEntries(VPS.map((vp) => [vp, { scrollHeight: 800, scrollWidth: vp, htmlBg: "rgb(255, 255, 255)", bodyBg: "rgb(255, 255, 255)", bodyColor: "rgb(0, 0, 0)", bodyFont: "Arial" }])),
+      nodeCount: 4,
+      keyframes: [],
+    },
+    root,
+  };
+}
+
+// A @font-face block whose src points at a root-absolute cloned asset path — exactly the
+// shape buildFontGraph emits. The preview must relativize the /assets/ prefix.
+const FONT_GRAPH: FontGraph = {
+  entries: [],
+  css: `@font-face {\n  font-family: "Demo";\n  src: url("/assets/cloned/fonts/abc123.woff2") format("woff2");\n}`,
+};
+
+/** Build a small page IR: body → heading (with own styles) + <img> (asset) + text. */
+function fixtureIr(): IR {
+  const heading = node("n1", "h1", computed({ color: "rgb(10, 20, 30)", fontSize: "40px" }), [{ text: "Hello preview" }]);
+  const img = node("n2", "img", computed(), [], { src: "https://example.test/logo.png", alt: "logo" });
+  const root = node("n0", "body", computed(), [heading, img]);
+  return irWith(root);
+}
+
+/** Asset map keyed as buildAssetMap keys it (source URL + pathname) → root-absolute local path. */
+function assetMap(): Map<string, string> {
+  return new Map([
+    ["https://example.test/logo.png", "/assets/cloned/images/logo.png"],
+    ["/logo.png", "/assets/cloned/images/logo.png"],
+  ]);
+}
+
+function emit(ir: IR, am: Map<string, string>): string {
+  return generatePreviewHtml({ ir, assetMap: am, fontGraph: FONT_GRAPH, tokensCss: ":root { --x: 1; }", sourceUrl: ir.doc.sourceUrl });
+}
+
+describe("preview.html static artifact", () => {
+  it("emits a self-contained HTML document with an inline <style> and no runtime scripts", () => {
+    const html = emit(fixtureIr(), assetMap());
+    assert.ok(html.startsWith("<!doctype html>"), "starts with doctype");
+    assert.ok(/<style>[\s\S]*<\/style>/.test(html), "carries an inline <style> block");
+    assert.ok(/<title>Preview Fixture<\/title>/.test(html), "carries the doc title");
+    // Static preview: NO Ditto runtime scripts, no <script> at all.
+    assert.ok(!/<script/i.test(html), "emits no <script> tags (runtime-free)");
+    assert.ok(!/DittoWire|DittoLottie|DittoMotion/.test(html), "no Ditto runtime references");
+    // The tree renders as real HTML with the per-node c<id> class + data-cid.
+    assert.ok(/<body class="cn0" data-cid="n0">/.test(html), "body carries its c<id> class + cid");
+    assert.ok(/<h1 class="cn1" data-cid="n1">/.test(html), "heading rendered as <h1> with class");
+    assert.ok(/Hello preview/.test(html), "text content rendered");
+  });
+
+  it("references assets with RELATIVE paths (public/assets/...), never root-absolute /assets", () => {
+    const html = emit(fixtureIr(), assetMap());
+    // The <img> src and the @font-face url() both resolve relative to public/.
+    assert.ok(/src="public\/assets\/cloned\/images\/logo\.png"/.test(html), "img src relativized to public/assets");
+    assert.ok(/url\("public\/assets\/cloned\/fonts\/abc123\.woff2"\)/.test(html), "font url relativized to public/assets");
+    // No leading-slash /assets refs survive (they'd break when opened at the app-dir root).
+    assert.ok(!/["(]\/assets\//.test(html), "no root-absolute /assets references remain");
+  });
+
+  it("is byte-stable across repeated emission from the same IR (determinism)", () => {
+    const a = emit(fixtureIr(), assetMap());
+    const b = emit(fixtureIr(), assetMap());
+    assert.equal(a, b, "two emissions of the same IR are byte-identical");
+  });
+
+  it("SHARES the css.ts rule collector — the inline CSS is the collectNodeRules/assembleCss output, not a re-derived path", () => {
+    const ir = fixtureIr();
+    const am = assetMap();
+    const html = emit(ir, am);
+
+    // Independently produce the per-node CSS the same way generateCss does (both go through
+    // collectNodeRules → assembleCss with `.c<id>` selectors). If the preview shared the
+    // collector, this exact block must appear verbatim inside its <style>.
+    const rules = collectNodeRules(ir, am);
+    const bands = computeBands(ir.doc.viewports, ir.doc.canonicalViewport);
+    const sharedNodeCss = assembleCss([...rules.keys()], (cid) => rules.get(cid)!, (cid) => `.c${cid}`, bands, "");
+
+    const styleBody = /<style>([\s\S]*)<\/style>/.exec(html)![1]!;
+    assert.ok(styleBody.includes(sharedNodeCss.trim()), "preview inline CSS contains the exact collectNodeRules/assembleCss output");
+
+    // Concretely: the heading's own base rule (color + font-size from collectNodeRules) is present
+    // exactly once — proving it's the shared collector's rule, not a duplicated re-emission.
+    const headingRule = /\.cn1\s*\{[^}]*\}/.exec(sharedNodeCss)![0];
+    assert.ok(headingRule.includes("color:rgb(10, 20, 30)") && headingRule.includes("font-size:40px"), "shared rule carries the node's decls");
+    const occurrences = styleBody.split(headingRule).length - 1;
+    assert.equal(occurrences, 1, "the shared per-node rule appears exactly once (no duplicated emission path)");
+  });
+
+  it("mirrors generateCss's `.c<id>` selectors so the preview and the css-mode app resolve identical rules", () => {
+    const ir = fixtureIr();
+    const am = assetMap();
+    // The legacy per-node css-mode emitter (generateCss) is the ground truth for `.c<id>` rules.
+    const appCss = generateCss(ir, am);
+    const styleBody = /<style>([\s\S]*)<\/style>/.exec(emit(ir, am))![1]!;
+    // Every `.c<id>{…}` base rule generateCss emits must be present verbatim in the preview.
+    for (const m of appCss.matchAll(/\.cn\d+\s*\{[^}]*\}/g)) {
+      assert.ok(styleBody.includes(m[0]), `preview carries app rule ${m[0].slice(0, 40)}…`);
+    }
+  });
+});

docs/DEPLOY.md

@@ -16,7 +16,15 @@ Postgres and S3-compatible storage. The recommended OSS-friendly stack:
    ```bash
    DATABASE_URL='postgres://...neon.../ditto_site?sslmode=require' npm run db:migrate
    ```
-   Run this on every deploy that changes `packages/db/migrations`.
+   Run this on every deploy that changes `packages/db/migrations`. Drizzle tracks
+   applied migrations in the database, so re-running is a no-op for anything
+   already applied. (Alternatively, apply a single migration by piping its SQL
+   through `psql`/the Neon CLI — but prefer `db:migrate`, which also records the
+   journal entry so future runs stay consistent.)
+
+   Current migrations: `0000` core tables, `0001` signup tokens,
+   `0002` `job_events` (structured clone-progress events behind
+   `GET /v1/clones/:id/events`).
 
 ## 2. Blob storage (R2 / S3)
 

docs/SERVICE.md

@@ -24,12 +24,35 @@ packages/
 
 Two run modes, same HTTP surface:
 
-- **In-memory (no `DATABASE_URL`)** — the API runs single-page clones **inline** and
-  holds results in memory. Handy for a quick local demo.
+- **In-memory (no `DATABASE_URL`)** — `POST` enqueues (202) and runs the clone in the
+  background within the API process, holding results in memory. Handy for a quick
+  local demo; same poll-to-completion contract as production.
 - **DB + queue (`DATABASE_URL` set)** — `POST` enqueues a job (202); a separate
   **worker** process consumes the queue, runs the clone, stores artifacts, and the
   client polls to completion. This is the production mode.
 
+In both modes the job emits structured progress events as it runs — the compiler's
+granular log stream (`{ event: "captured", ... }`, `{ event: "generated", ... }`,
+`{ event: "build_start", ... }`, etc.) plus service phases (`{ event: "clone_done" }`,
+`{ event: "clone_error", error }`). Every event carries a millisecond wall-clock
+timestamp `t`; the rest of each object is the payload the emitter logged, so field sets
+vary by event. There is no fixed enum of event types — treat unknown `event` strings as
+opaque progress and drive UI off the coarse job `status` from `GET /v1/clones/:id`.
+
+Poll `GET /v1/clones/:id/events?after=N` → `{ jobId, events: [{ t, ... }] }`. `after` is a
+**sequence cursor** (a 1-based event count, not a timestamp): pass the number of events
+you have already consumed to get only newer ones. Caveats:
+
+- The returned event bodies do **not** include the `seq` value, so track the cursor
+  yourself as a running count of events received.
+- The in-memory backend **ignores `after`** and returns the full list on every poll — so
+  in that mode you always get all events and must de-duplicate by count. The DB backend
+  honors `after` (`seq > N`).
+
+In production (DB) mode events persist in the `job_events` table (migration
+`0002_productive_wallflower.sql`) with a per-job `seq`, so they survive worker restarts
+and remain readable after completion.
+
 ## Local development
 
 ```bash
@@ -84,8 +107,10 @@ POST   /v1/signup/request         { email } → 202 {message}                 (s
 POST   /v1/signup/verify          { token } → 201 {apiKey,message}          (consume email token)
 GET    /v1/clones                  → list (metadata)
 GET    /v1/clones/:id              → status + metadata (fileCount, totalBytes, capture, timings)
+GET    /v1/clones/:id/events?after=N → { jobId, events } — progress events after cursor N (poll while running)
 GET    /v1/clones/:id/result       → the eager CloneResult (text files inline; binaries by URL)
-GET    /v1/clones/:id/files/*      → stream one file
+GET    /v1/clones/:id/files/*      → stream one generated file (e.g. .../files/preview.html — see Preview)
+GET    /v1/clones/:id/app-preview/*  → serve the clone's built static export when present (404 until built)
 GET    /v1/clones/:id/bundle?format=tgz|zip  → the whole app as one archive (302 → S3 when configured)
 DELETE /v1/clones/:id              → purge artifacts
 GET    /healthz                    → { ok: true }  (unauthenticated)
@@ -106,8 +131,10 @@ one-time email link, and `POST /v1/signup/verify` consumes the token, stores
 only the API key's SHA-256 hash in Postgres, stores the verified email in the
 key label for attribution, and returns the raw key once.
 
-Normal product `options` are `{ mode?: "single" | "multi", styling?: "tailwind" | "css", framework?: "next" | "vite" }`.
-`mode` defaults to `"single"`, `styling` defaults to `"tailwind"`, and `framework` defaults to `"next"`. Operational options
+Normal product `options` are `{ mode?: "single" | "multi", styling?: "tailwind" | "css", framework?: "next" | "vite", preview?: boolean }`.
+`mode` defaults to `"single"`, `styling` defaults to `"tailwind"`, and `framework` defaults to `"next"`. `preview`
+controls the browsable built export served at `/v1/clones/:id/app-preview/` (see **Preview** below); it is on by
+default for single-page clones, so pass `preview:true` to force it for a multi-page clone. Operational options
 remain `{ verify?, asyncVerify?, maxRoutes?, maxCollection?, captureConcurrency?, validationConcurrency?, viewportConcurrency?, noCache? }`; `noCache` is service-level and
 bypasses the cache. Deprecated aliases (`multiPage`, `humanizeMode`) and dev-only escape
 hatches are still accepted for compatibility, but are not part of the normal product surface.
@@ -122,6 +149,46 @@ attaches the verify report afterward while the worker still has the run artifact
 current async QA path; a post-hoc verify endpoint would require persisting full capture artifacts,
 not just the generated app bundle.
 
+## Preview
+
+Every clone emits a flat, self-contained **`preview.html`** at generate time — it is a
+regular entry in the result file map (path `preview.html`, at the app root), and the
+manifest records it as `preview_html: "preview.html"` (always present). It exists as soon
+as the compiler's `generate` step finishes emitting the file map — well before any Next
+build or deploy — so a consumer can show the cloned page within seconds. Its arrival is
+visible in the event stream as a `{ event: "generated", ... }` event.
+
+Fetch it through the ordinary files route:
+
+```bash
+curl -sS -H "authorization: Bearer $DITTO_API_KEY" \
+  "$DITTO_API_URL/v1/clones/$JOB_ID/files/preview.html" -o preview.html
+```
+
+**What it is — and isn't.** `preview.html` is a single HTML file with inline CSS and **no
+JavaScript** (no runtime scripts). It renders the captured page statically: animations are
+frozen at their captured start frame, Lottie/`<video>` mounts show their captured
+poster/first-frame still, and nothing is interactive — no menus, no hover, no scroll
+effects. It is a faithful *picture* of the page, not a working app. For interaction, use the
+built export (`/v1/clones/:id/app-preview/`) or the deployed app.
+
+**Relative assets.** `preview.html` references its images and fonts with relative paths
+(`public/assets/cloned/...`), so those sub-paths resolve against the same files route the
+HTML itself came from (`/v1/clones/:id/files/public/assets/cloned/...`). Serve or proxy the
+file under that mount and the assets load with no rewriting.
+
+**Iframe auth caveat.** Because the files route is authenticated (when `API_KEYS`/DB keys
+are set), you cannot drop `.../files/preview.html` straight into an `<iframe src=...>` — the
+browser can't attach your `Authorization` header to the iframe's asset sub-requests, so
+images and fonts 404. Front it with a small server-side proxy that injects the key and
+re-serves both the HTML and its `public/assets/...` sub-paths from your own origin, then
+point the iframe at the proxy.
+
+**Intended staging.** The preview is the middle rung of a three-step reveal for a consumer
+UI: show the **original site** first (instant), swap to **`preview.html`** the moment
+`generate` finishes (seconds — a static, frozen likeness), then swap to the **deployed app**
+once the build + deploy completes (fully interactive).
+
 **Incremental clone (single → multi, for speed).** Clone one URL single-page first
 (fast app back), then POST the **same URL** with `{ mode: "multi" }` — the second call
 reuses the first's entry capture (no re-capture of page 1), crawls + captures only the

package-lock.json

@@ -26,8 +26,8 @@
       "version": "0.1.0",
       "license": "MIT",
       "dependencies": {
-        "pixelmatch": "7.2.0",
-        "playwright": "1.61.1",
+        "pixelmatch": "5.3.0",
+        "playwright": "1.56.1",
         "pngjs": "7.0.0"
       },
       "bin": {
@@ -41,16 +41,107 @@
         "typescript": "5.7.3"
       }
     },
-    "node_modules/@aws-sdk/checksums": {
-      "version": "3.1000.12",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/checksums/-/checksums-3.1000.12.tgz",
-      "integrity": "sha512-RgNDWfhNRIlNEzePIRrYTNi/6q+wwRMMapojn8YVzw4ZcJRa/gxVMtUbeZARR1gmopuv6oIhMbY7J66qIQ0ynw==",
+    "node_modules/@aws-crypto/crc32": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@aws-crypto/crc32/-/crc32-5.2.0.tgz",
+      "integrity": "sha512-nLbCWqQNgUiwwtFsen1AdzAtvuLRsQS8rYgMuxCrdKf9kOssamGLuPwyTY9wyYblNr9+1XM8v6zoDTPPSIeANg==",
       "license": "Apache-2.0",
       "dependencies": {
-        "@aws-sdk/core": "^3.974.27",
-        "@aws-sdk/types": "^3.973.15",
-        "@smithy/core": "^3.29.0",
-        "@smithy/types": "^4.15.1",
+        "@aws-crypto/util": "^5.2.0",
+        "@aws-sdk/types": "^3.222.0",
+        "tslib": "^2.6.2"
+      },
+      "engines": {
+        "node": ">=16.0.0"
+      }
+    },
+    "node_modules/@aws-crypto/crc32c": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@aws-crypto/crc32c/-/crc32c-5.2.0.tgz",
+      "integrity": "sha512-+iWb8qaHLYKrNvGRbiYRHSdKRWhto5XlZUEBwDjYNf+ly5SVYG6zEoYIdxvf5R3zyeP16w4PLBn3rH1xc74Rag==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@aws-crypto/util": "^5.2.0",
+        "@aws-sdk/types": "^3.222.0",
+        "tslib": "^2.6.2"
+      }
+    },
+    "node_modules/@aws-crypto/sha1-browser": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@aws-crypto/sha1-browser/-/sha1-browser-5.2.0.tgz",
+      "integrity": "sha512-OH6lveCFfcDjX4dbAvCFSYUjJZjDr/3XJ3xHtjn3Oj5b9RjojQo8npoLeA/bNwkOkrSQ0wgrHzXk4tDRxGKJeg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@aws-crypto/supports-web-crypto": "^5.2.0",
+        "@aws-crypto/util": "^5.2.0",
+        "@aws-sdk/types": "^3.222.0",
+        "@aws-sdk/util-locate-window": "^3.0.0",
+        "@smithy/util-utf8": "^2.0.0",
+        "tslib": "^2.6.2"
+      }
+    },
+    "node_modules/@aws-crypto/sha256-browser": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@aws-crypto/sha256-browser/-/sha256-browser-5.2.0.tgz",
+      "integrity": "sha512-AXfN/lGotSQwu6HNcEsIASo7kWXZ5HYWvfOmSNKDsEqC4OashTp8alTmaz+F7TC2L083SFv5RdB+qU3Vs1kZqw==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@aws-crypto/sha256-js": "^5.2.0",
+        "@aws-crypto/supports-web-crypto": "^5.2.0",
+        "@aws-crypto/util": "^5.2.0",
+        "@aws-sdk/types": "^3.222.0",
+        "@aws-sdk/util-locate-window": "^3.0.0",
+        "@smithy/util-utf8": "^2.0.0",
+        "tslib": "^2.6.2"
+      }
+    },
+    "node_modules/@aws-crypto/sha256-js": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@aws-crypto/sha256-js/-/sha256-js-5.2.0.tgz",
+      "integrity": "sha512-FFQQyu7edu4ufvIZ+OadFpHHOt+eSTBaYaki44c+akjg7qZg9oOQeLlk77F6tSYqjDAFClrHJk9tMf0HdVyOvA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@aws-crypto/util": "^5.2.0",
+        "@aws-sdk/types": "^3.222.0",
+        "tslib": "^2.6.2"
+      },
+      "engines": {
+        "node": ">=16.0.0"
+      }
+    },
+    "node_modules/@aws-crypto/supports-web-crypto": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@aws-crypto/supports-web-crypto/-/supports-web-crypto-5.2.0.tgz",
+      "integrity": "sha512-iAvUotm021kM33eCdNfwIN//F77/IADDSs58i+MDaOqFrVjZo9bAal0NK7HurRuWLLpF1iLX7gbWrjHjeo+YFg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "tslib": "^2.6.2"
+      }
+    },
+    "node_modules/@aws-crypto/util": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@aws-crypto/util/-/util-5.2.0.tgz",
+      "integrity": "sha512-4RkU9EsI6ZpBve5fseQlGNUWKMa1RLPQ1dnjnQoe07ldfIzcsGb5hC5W0Dm7u423KWzawlrpbjXBrXCEv9zazQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@aws-sdk/types": "^3.222.0",
+        "@smithy/util-utf8": "^2.0.0",
+        "tslib": "^2.6.2"
+      }
+    },
+    "node_modules/@aws-sdk/checksums": {
+      "version": "3.1000.8",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/checksums/-/checksums-3.1000.8.tgz",
+      "integrity": "sha512-v0U9S7gBIme3OTgt1LdbAF4RpvavCc+4GK1+1xqAcqtbrHsEhjQo6R45LKcjhs/+WrRJij1Y0Gztw7QPAIeUfA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@aws-crypto/crc32": "5.2.0",
+        "@aws-crypto/crc32c": "5.2.0",
+        "@aws-crypto/util": "5.2.0",
+        "@aws-sdk/core": "^3.974.23",
+        "@aws-sdk/types": "^3.973.13",
+        "@smithy/core": "^3.24.6",
+        "@smithy/types": "^4.14.3",
         "tslib": "^2.6.2"
       },
       "engines": {
@@ -58,21 +149,24 @@
       }
     },
     "node_modules/@aws-sdk/client-s3": {
-      "version": "3.1079.0",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/client-s3/-/client-s3-3.1079.0.tgz",
-      "integrity": "sha512-di9U/7Po7qlVYb2dq58ULsbBAE1pBIk53rux+50LQCvH1X+/l1Ys+BIk/QLBtdaK1nADk0xRNEBbA1QWVnMccw==",
+      "version": "3.1074.0",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/client-s3/-/client-s3-3.1074.0.tgz",
+      "integrity": "sha512-NxC62ifhtaDDdJjZ8f8Y49DCOpviGGSwzdE4KO/DA1vui4dJP4CAq+64HQkdAjFw64i5cVZb5mF6off+pZX/pg==",
       "license": "Apache-2.0",
       "dependencies": {
-        "@aws-sdk/checksums": "^3.1000.12",
-        "@aws-sdk/core": "^3.974.27",
-        "@aws-sdk/credential-provider-node": "^3.972.62",
-        "@aws-sdk/middleware-sdk-s3": "^3.972.58",
-        "@aws-sdk/signature-v4-multi-region": "^3.996.38",
-        "@aws-sdk/types": "^3.973.15",
-        "@smithy/core": "^3.29.0",
-        "@smithy/fetch-http-handler": "^5.6.2",
-        "@smithy/node-http-handler": "^4.9.2",
-        "@smithy/types": "^4.15.1",
+        "@aws-crypto/sha1-browser": "5.2.0",
+        "@aws-crypto/sha256-browser": "5.2.0",
+        "@aws-crypto/sha256-js": "5.2.0",
+        "@aws-sdk/core": "^3.974.23",
+        "@aws-sdk/credential-provider-node": "^3.972.58",
+        "@aws-sdk/middleware-flexible-checksums": "^3.974.33",
+        "@aws-sdk/middleware-sdk-s3": "^3.972.54",
+        "@aws-sdk/signature-v4-multi-region": "^3.996.35",
+        "@aws-sdk/types": "^3.973.13",
+        "@smithy/core": "^3.24.6",
+        "@smithy/fetch-http-handler": "^5.4.6",
+        "@smithy/node-http-handler": "^4.7.6",
+        "@smithy/types": "^4.14.3",
         "tslib": "^2.6.2"
       },
       "engines": {
@@ -80,17 +174,17 @@
       }
     },
     "node_modules/@aws-sdk/core": {
-      "version": "3.974.27",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/core/-/core-3.974.27.tgz",
-      "integrity": "sha512-WRWEgIq6vx+NU6ot3VrRu4Jovj9MIObitSi6of/GV5THDDPccBhivCRNkWJutMM+m3GvdeI3l/UbGNcoOobxOA==",
+      "version": "3.974.23",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/core/-/core-3.974.23.tgz",
+      "integrity": "sha512-MiWR/uWjxjFXGzrE0Ghc5lWxUxzHsUWFhV+OX7M4cR9SrmrnZs6TXavnCWnzzdwJeFri34xQo81rvGNzK3c4BQ==",
       "license": "Apache-2.0",
       "dependencies": {
-        "@aws-sdk/types": "^3.973.15",
-        "@aws-sdk/xml-builder": "^3.972.33",
-        "@aws/lambda-invoke-store": "^0.3.0",
-        "@smithy/core": "^3.29.0",
-        "@smithy/signature-v4": "^5.6.1",
-        "@smithy/types": "^4.15.1",
+        "@aws-sdk/types": "^3.973.13",
+        "@aws-sdk/xml-builder": "^3.972.31",
+        "@aws/lambda-invoke-store": "^0.2.2",
+        "@smithy/core": "^3.24.6",
+        "@smithy/signature-v4": "^5.4.6",
+        "@smithy/types": "^4.14.3",
         "bowser": "^2.11.0",
         "tslib": "^2.6.2"
       },
@@ -99,15 +193,15 @@
       }
     },
     "node_modules/@aws-sdk/credential-provider-env": {
-      "version": "3.972.53",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/credential-provider-env/-/credential-provider-env-3.972.53.tgz",
-      "integrity": "sha512-+KDA3uc/HZ1vIneGu5QMQb0gAXDYrm2vOE60+BJ7lS0YinMQ5i2oV4PR1A16XkF6K1IbSwjEHd1hQIIgMsK48w==",
+      "version": "3.972.49",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/credential-provider-env/-/credential-provider-env-3.972.49.tgz",
+      "integrity": "sha512-liB3yQNHCM9k/gu/w36XHMKPluT7HTlnGUhRbBGSISDQkcr/Sy1zsZabiuvQj8WG5yW573u9RehrBvvnIQ9OEQ==",
       "license": "Apache-2.0",
       "dependencies": {
-        "@aws-sdk/core": "^3.974.27",
-        "@aws-sdk/types": "^3.973.15",
-        "@smithy/core": "^3.29.0",
-        "@smithy/types": "^4.15.1",
+        "@aws-sdk/core": "^3.974.23",
+        "@aws-sdk/types": "^3.973.13",
+        "@smithy/core": "^3.24.6",
+        "@smithy/types": "^4.14.3",
         "tslib": "^2.6.2"
       },
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-      "version": "4.4.3",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.3.tgz",
-      "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
@@ -3656,10 +3794,10 @@
         "@cloner/core": "*",
         "@cloner/db": "*",
         "@cloner/storage": "*",
-        "@hono/node-server": "^2.0.8",
+        "@hono/node-server": "^1.13.7",
         "@modelcontextprotocol/sdk": "^1.29.0",
-        "hono": "^4.12.28",
-        "zod": "^4.4.3"
+        "hono": "^4.6.14",
+        "zod": "^3.24.1"
       },
       "devDependencies": {
         "@cloner/test-utils": "*",
@@ -3668,18 +3806,6 @@
         "typescript": "5.7.3"
       }
     },
-    "packages/api/node_modules/@hono/node-server": {
-      "version": "2.0.8",
-      "resolved": "https://registry.npmjs.org/@hono/node-server/-/node-server-2.0.8.tgz",
-      "integrity": "sha512-GuCWzLxwg218fy1JaHculFsdcuY12hxit83V+algozTPnwhNjLrRL/Alg9OYjLZLoUZ1rw/S4CdTMsnkSKCmFA==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=20"
-      },
-      "peerDependencies": {
-        "hono": "^4"
-      }
-    },
     "packages/cli": {
       "name": "ditto",
       "version": "0.1.0",
@@ -3712,7 +3838,7 @@
       "dependencies": {
         "drizzle-orm": "^0.45.2",
         "pg": "^8.13.1",
-        "pg-boss": "^12.25.1"
+        "pg-boss": "^10.1.5"
       },
       "devDependencies": {
         "@cloner/test-utils": "*",
@@ -3728,8 +3854,8 @@
       "version": "0.1.0",
       "license": "MIT",
       "dependencies": {
-        "@aws-sdk/client-s3": "^3.1079.0",
-        "@aws-sdk/s3-request-presigner": "^3.1079.0",
+        "@aws-sdk/client-s3": "^3.726.0",
+        "@aws-sdk/s3-request-presigner": "^3.726.0",
         "@cloner/core": "*"
       },
       "devDependencies": {

packages/api/package.json

@@ -28,10 +28,10 @@
     "@cloner/core": "*",
     "@cloner/db": "*",
     "@cloner/storage": "*",
-    "@hono/node-server": "^2.0.8",
+    "@hono/node-server": "^1.13.7",
     "@modelcontextprotocol/sdk": "^1.29.0",
-    "hono": "^4.12.28",
-    "zod": "^4.4.3"
+    "hono": "^4.6.14",
+    "zod": "^3.24.1"
   },
   "devDependencies": {
     "@cloner/test-utils": "*",

packages/api/src/app.ts

@@ -15,6 +15,7 @@ const OptionsSchema = z
     mode: z.enum(["single", "multi"]).optional(),
     styling: z.enum(["tailwind", "css"]).optional(),
     framework: z.enum(["next", "vite"]).optional(),
+    preview: z.boolean().optional(),
     verify: z.boolean().optional(),
     asyncVerify: z.boolean().optional(),
     maxRoutes: z.number().int().positive().optional(),
@@ -238,10 +239,12 @@ export function createApp(deps: AppDeps): Hono {
 
     try {
       const out = await backend.submit(url, opts);
-      if (out.status === "queued") return c.json({ jobId: out.jobId, status: "queued" }, 202);
+      if (out.status === "queued") return c.json({ jobId: out.jobId, status: "queued" }, out.httpStatus);
       return c.json(out.result, 200);
     } catch (e) {
-      return c.json({ status: "failed", error: String(e).slice(0, 500) }, 500);
+      const msg = String(e);
+      if (msg.startsWith("BUSY:")) return c.json({ error: msg.slice(5).trim() }, 429);
+      return c.json({ status: "failed", error: msg.slice(0, 500) }, 500);
     }
   });
 
@@ -282,6 +285,40 @@ export function createApp(deps: AppDeps): Hono {
     return c.body(file.bytes);
   });
 
+  // Pipeline progress events (poll every ~300ms while a clone runs).
+  app.get("/v1/clones/:id/events", async (c) => {
+    const after = Math.max(0, Number(c.req.query("after") ?? "0") || 0);
+    const events = backend.events ? await backend.events(c.req.param("id"), after) : null;
+    if (!events) return c.json({ error: "not found" }, 404);
+    return c.json({ jobId: c.req.param("id"), events });
+  });
+
+  // Browsable preview of the built clone (static export published by the preview
+  // build under public/app-preview/). References are relative, so the export works
+  // from this mount — the only requirement is a trailing slash on the root.
+  const previewFile = async (c: Context, sub: string) => {
+    const id = c.req.param("id") ?? "";
+    const tryPaths = sub.includes(".")
+      ? [`public/app-preview/${sub}`]
+      : [
+          `public/app-preview/${sub}`.replace(/\/$/, "") + "/index.html",
+          `public/app-preview/${sub}`,
+          `public/app-preview/${sub}.html`,
+        ];
+    for (const p of tryPaths) {
+      const file = await backend.file(id, p);
+      if (file) {
+        c.header("content-type", file.contentType);
+        c.header("content-length", String(file.bytes.length));
+        return c.body(file.bytes);
+      }
+    }
+    return c.json({ error: "no app preview for this clone (preview builds are on by default for single-page clones; pass options.preview=true otherwise)" }, 404);
+  };
+  app.get("/v1/clones/:id/app-preview", (c) => c.redirect(`/v1/clones/${c.req.param("id")}/app-preview/`, 302));
+  app.get("/v1/clones/:id/app-preview/", (c) => previewFile(c, "index.html"));
+  app.get("/v1/clones/:id/app-preview/:path{.+}", (c) => previewFile(c, c.req.param("path") ?? ""));
+
   app.delete("/v1/clones/:id", async (c) => {
     const ok = await backend.remove(c.req.param("id"));
     return c.json({ deleted: ok }, ok ? 200 : 404);

packages/api/src/backend.ts

@@ -1,5 +1,5 @@
 import type { CloneOptions, RouteInfo } from "@cloner/core";
-import type { RestCloneResult } from "./rest.js";
+import type { RestCloneResult, RestCloneSummary } from "./rest.js";
 
 export type JobStatus = "queued" | "running" | "succeeded" | "failed" | "cached";
 
@@ -22,7 +22,7 @@ export type JobView = {
 };
 
 export type SubmitOutcome =
-  | { jobId: string; status: "succeeded" | "cached"; httpStatus: 200; result: RestCloneResult }
+  | { jobId: string; status: "succeeded" | "cached"; httpStatus: 200; result: RestCloneResult | RestCloneSummary }
   | { jobId: string; status: "queued"; httpStatus: 202 };
 
 export type ResultOutcome =
@@ -56,4 +56,6 @@ export interface Backend {
   facets(jobId: string): Promise<FileFacet[] | null>;
   /** The whole app as one compressed archive (null if not ready/found). */
   bundle(jobId: string, format?: BundleFormat): Promise<CloneBundle | null>;
+  /** Pipeline progress events for polling UIs (null if unsupported or job unknown). */
+  events?(jobId: string, after?: number): Promise<Array<Record<string, unknown>> | null>;
 }

packages/api/src/backends/db.ts

@@ -25,6 +25,13 @@ export class DbBackend implements Backend {
           return { jobId: hit.jobId, status: "cached", httpStatus: 200, result: { ...r.result, status: "cached" } };
         }
       }
+      // In-flight dedup: an identical clone is already queued/running — attach the
+      // caller to that job instead of enqueueing a duplicate capture. (Best-effort:
+      // no unique constraint, so a same-instant race can still double-submit.)
+      const active = await repo.findActiveJobByCacheKey(this.deps.db, key);
+      if (active) {
+        return { jobId: active.id, status: "queued", httpStatus: 202 };
+      }
     }
 
     const job = await repo.createJob(this.deps.db, { kind, url, options: options ?? {}, status: "queued", cacheKey: key });
@@ -142,4 +149,10 @@ export class DbBackend implements Backend {
     const url = this.deps.store.uploadBundle ? await this.deps.store.uploadBundle(jobId, format, bytes) : undefined;
     return { bytes, sha256: sha256hex(bytes), format, url };
   }
+
+  async events(jobId: string, after = 0): Promise<Array<Record<string, unknown>> | null> {
+    const job = await repo.getJob(this.deps.db, jobId);
+    if (!job) return null;
+    return repo.listJobEvents(this.deps.db, jobId, after);
+  }
 }

packages/api/src/backends/inMemory.ts

@@ -10,24 +10,51 @@ import type { Backend, BundleFormat, CloneBundle, FileFacet, JobView, ResultOutc
 
 export type RunJob = (input: RunCloneJobInput) => Promise<CloneJobResult>;
 
-/** Sync, in-memory backend (M1): runs the clone INLINE on submit and holds results
- *  in memory. POST returns the file map immediately (200). */
+/** In-memory backend: enqueues a clone (202) and runs it in the background so long
+ *  captures (multi-viewport + verify) never hold a single HTTP connection open for
+ *  minutes — which browsers surface as `TypeError: Failed to fetch` when the link
+ *  drops (server restart, hot-reload, idle timeout). Poll /v1/clones/:id + /events. */
 export class InMemoryBackend implements Backend {
   constructor(private deps: { store: InMemoryStore; runJob: RunJob; makeTempBase?: () => string; captureCacheDir?: string }) {}
 
+  private activeClones = 0;
+
   private makeBase(): string {
     return (this.deps.makeTempBase ?? (() => mkdtempSync(join(tmpdir(), "api-clone-"))))();
   }
 
   async submit(url: string, options: CloneOptions | undefined): Promise<SubmitOutcome> {
+    if (this.activeClones > 0 || this.deps.store.list().some((j) => j.status === "running")) {
+      throw new Error("BUSY: another clone is already running — wait for it to finish (use npm run dev:api:stable to avoid hot-reload killing Playwright)");
+    }
     const id = randomUUID();
     const base = this.makeBase();
+    const events: Array<Record<string, unknown>> = [];
+    const kind: "clone" | "clone_site" = resolveCloneMode(options) === "multi" ? "clone_site" : "clone";
+    const rec = { id, status: "running" as const, url, kind, options: options ?? {}, createdAt: Date.now(), base, events };
+    this.deps.store.put(rec);
+    void this.runInBackground(id, url, options, rec, base, events, kind);
+    return { jobId: id, status: "queued", httpStatus: 202 };
+  }
+
+  private async runInBackground(
+    id: string,
+    url: string,
+    options: CloneOptions | undefined,
+    rec: { id: string; status: "running"; url: string; kind: "clone" | "clone_site"; options: CloneOptions; createdAt: number; base: string; events: Array<Record<string, unknown>> },
+    base: string,
+    events: Array<Record<string, unknown>>,
+    kind: "clone" | "clone_site",
+  ): Promise<void> {
+    this.activeClones++;
+    const log = (e: Record<string, unknown>) => {
+      events.push({ t: Date.now(), ...e });
+      this.deps.store.put({ ...rec, events: [...events] });
+    };
     try {
-      // captureCacheDir (persistent, shared across submits) powers the single→multi
-      // reuse: a single-page submit stashes its capture; a later multi-page submit for
-      // the same URL reuses it as the entry route (no re-capture) and expands the site.
-      const result = await this.deps.runJob({ url, options, runsDir: base, captureCacheDir: this.deps.captureCacheDir });
-      this.deps.store.put({ id, status: "succeeded", url, kind: result.kind, options: result.options, createdAt: Date.now(), result, base });
+      const result = await this.deps.runJob({ url, options, runsDir: base, captureCacheDir: this.deps.captureCacheDir, log });
+      log({ event: "clone_done" });
+      this.deps.store.put({ id, status: "succeeded", url, kind: result.kind, options: result.options, createdAt: rec.createdAt, result, base, events });
       if (result.options.asyncVerify) {
         void verifyCloneJobResult(result, {
           validationConcurrency: result.options.validationConcurrency,
@@ -39,18 +66,25 @@ export class InMemoryBackend implements Backend {
           result.verify = { error: String(e).slice(0, 500), async: true };
         });
       }
-      return { jobId: id, status: "succeeded", httpStatus: 200, result: buildRestResult(id, result, `/v1/clones/${id}/files`) };
     } catch (e) {
       try {
         rmSync(base, { recursive: true, force: true });
       } catch {
         /* best effort */
       }
-      this.deps.store.put({ id, status: "failed", url, kind: resolveCloneMode(options) === "multi" ? "clone_site" : "clone", options: options ?? {}, createdAt: Date.now(), error: String(e) });
-      throw e;
+      log({ event: "clone_error", error: String(e).slice(0, 300) });
+      this.deps.store.put({ id, status: "failed", url, kind, options: options ?? {}, createdAt: rec.createdAt, error: String(e), events });
+    } finally {
+      this.activeClones = Math.max(0, this.activeClones - 1);
     }
   }
 
+  async events(jobId: string): Promise<Array<Record<string, unknown>> | null> {
+    const rec = this.deps.store.get(jobId);
+    if (!rec) return null;
+    return rec.events ?? [];
+  }
+
   async status(jobId: string): Promise<JobView | null> {
     const rec = this.deps.store.get(jobId);
     if (!rec) return null;

packages/api/src/store.ts

@@ -6,7 +6,7 @@ import type { CloneJobResult, CloneOptions } from "@cloner/core";
  *  it is removed on eviction. M2/M4 replace this with DB rows + S3 objects. */
 export type JobRecord = {
   id: string;
-  status: "succeeded" | "failed";
+  status: "running" | "succeeded" | "failed";
   url: string;
   kind: "clone" | "clone_site";
   options: CloneOptions;
@@ -14,6 +14,8 @@ export type JobRecord = {
   result?: CloneJobResult;
   base?: string;
   error?: string;
+  /** pipeline progress events (compiler log stream + service phases), poll via /events */
+  events?: Array<Record<string, unknown>>;
 };
 
 /** In-memory result store with TTL eviction. Swapped for a DB-backed store in M2. */

packages/api/test/app.fixture.test.ts

@@ -26,13 +26,25 @@ describe("POST /v1/clones (real clone, served fixture)", { skip: hasChromium() ?
       headers: { "content-type": "application/json" },
       body: JSON.stringify({ url: server.url + "/components.html", options: { interactions: false, components: true, motion: false } }),
     });
-    assert.equal(res.status, 200);
-    const body = await res.json();
-    assert.equal(body.status, "succeeded");
-    assert.ok(body.files["src/app/page.tsx"], "has page.tsx");
-    assert.equal(body.files["src/app/page.tsx"].type, "text");
-    assert.ok(body.files["package.json"], "has package.json");
-    assert.ok(body.capture.nodeCount > 0);
-    assert.equal(body.capture.blocked, false);
+    assert.equal(res.status, 202);
+    const queued = await res.json();
+    let body: Record<string, unknown> | undefined;
+    for (let i = 0; i < 600; i++) {
+      const view = await (await app.request(`/v1/clones/${queued.jobId}`)).json();
+      if (view.status === "succeeded") {
+        body = await (await app.request(`/v1/clones/${queued.jobId}/result`)).json();
+        break;
+      }
+      if (view.status === "failed") assert.fail(view.error);
+      await new Promise((r) => setTimeout(r, 50));
+    }
+    assert.ok(body);
+    const files = body!.files as Record<string, { type: string }>;
+    assert.equal(body!.status, "succeeded");
+    assert.ok(files["src/app/page.tsx"], "has page.tsx");
+    assert.equal(files["src/app/page.tsx"].type, "text");
+    assert.ok(files["package.json"], "has package.json");
+    assert.ok((body!.capture as { nodeCount: number }).nodeCount > 0);
+    assert.equal((body!.capture as { blocked: boolean }).blocked, false);
   });
 });

packages/api/test/app.test.ts

@@ -34,7 +34,17 @@ const fakeRunJob: RunJob = async (input) => {
   } satisfies CloneJobResult;
 };
 
-test("POST /v1/clones returns the eager file map; binaries by reference; streaming + lifecycle", async () => {
+async function waitForResult(app: ReturnType<typeof createApp>, jobId: string) {
+  for (let i = 0; i < 200; i++) {
+    const view = await (await app.request(`/v1/clones/${jobId}`)).json();
+    if (view.status === "succeeded") return await (await app.request(`/v1/clones/${jobId}/result`)).json();
+    if (view.status === "failed") throw new Error(String(view.error));
+    await new Promise((r) => setTimeout(r, 5));
+  }
+  throw new Error("timeout waiting for clone");
+}
+
+test("POST /v1/clones enqueues then completes; binaries by reference; streaming + lifecycle", async () => {
   const store = new InMemoryStore(60_000);
   const app = createApp({ backend: new InMemoryBackend({ store, runJob: fakeRunJob }) });
   try {
@@ -43,39 +53,47 @@ test("POST /v1/clones returns the eager file map; binaries by reference; streami
       headers: { "content-type": "application/json" },
       body: JSON.stringify({ url: "https://example.com/", options: {} }),
     });
-    assert.equal(res.status, 200);
-    const body = await res.json();
-    assert.ok(body.jobId);
-    assert.equal(body.status, "succeeded");
-    assert.equal(body.kind, "clone");
+    assert.equal(res.status, 202);
+    const queued = await res.json();
+    assert.ok(queued.jobId);
+    assert.equal(queued.status, "queued");
+
+    let body: Record<string, unknown> | undefined;
+    body = await waitForResult(app, queued.jobId);
+    assert.ok(body);
+    assert.equal(body!.status, "succeeded");
+    assert.equal(body!.kind, "clone");
 
     // Text inline.
-    const page = body.files["src/app/page.tsx"];
-    assert.equal(page.type, "text");
-    assert.ok(page.content.includes("Page"));
-    assert.ok(page.sha256);
+    const files = body!.files as Record<string, { type: string; content?: string; sha256?: string; url?: string }>;
+    const page = files["src/app/page.tsx"];
+    assert.ok(page);
+    assert.equal(page!.type, "text");
+    assert.ok(page!.content!.includes("Page"));
+    assert.ok(page!.sha256);
 
     // Binary by reference (URL, not bytes).
-    const bin = body.files["public/assets/cloned/images/a.png"];
-    assert.equal(bin.type, "binary");
-    assert.equal(bin.content, undefined);
-    assert.equal(bin.url, `/v1/clones/${body.jobId}/files/public/assets/cloned/images/a.png`);
+    const bin = files["public/assets/cloned/images/a.png"];
+    assert.ok(bin);
+    assert.equal(bin!.type, "binary");
+    assert.equal(bin!.content, undefined);
+    assert.equal(bin!.url, `/v1/clones/${queued.jobId}/files/public/assets/cloned/images/a.png`);
 
     // Per-file streaming returns the actual bytes.
-    const fileRes = await app.request(bin.url);
+    const fileRes = await app.request(bin!.url!);
     assert.equal(fileRes.status, 200);
     assert.equal(fileRes.headers.get("content-type"), "image/png");
     const bytes = Buffer.from(await fileRes.arrayBuffer());
     assert.equal(bytes.length, 7);
 
     // Cheap metadata overview (no file contents).
-    const meta = await (await app.request(`/v1/clones/${body.jobId}`)).json();
+    const meta = await (await app.request(`/v1/clones/${queued.jobId}`)).json();
     assert.equal(meta.fileCount, 3);
     assert.equal(meta.capture.nodeCount, 42);
     assert.equal(meta.totalBytes > 0, true);
 
     // Full result fetch.
-    const result = await app.request(`/v1/clones/${body.jobId}/result`);
+    const result = await app.request(`/v1/clones/${queued.jobId}/result`);
     assert.equal(result.status, 200);
 
     // List.
@@ -83,9 +101,9 @@ test("POST /v1/clones returns the eager file map; binaries by reference; streami
     assert.equal(list.clones.length, 1);
 
     // Delete purges; subsequent fetch 404s.
-    const del = await app.request(`/v1/clones/${body.jobId}`, { method: "DELETE" });
+    const del = await app.request(`/v1/clones/${queued.jobId}`, { method: "DELETE" });
     assert.equal((await del.json()).deleted, true);
-    assert.equal((await app.request(`/v1/clones/${body.jobId}`)).status, 404);
+    assert.equal((await app.request(`/v1/clones/${queued.jobId}`)).status, 404);
   } finally {
     store.clear();
   }
@@ -118,8 +136,9 @@ test("POST /v1/clones normalizes product options and legacy aliases", async () =
       headers: { "content-type": "application/json" },
       body: JSON.stringify({ url: "https://example.com/", options: { mode: "multi", styling: "css", framework: "vite" } }),
     });
-    assert.equal(product.status, 200);
-    const productBody = await product.json();
+    assert.equal(product.status, 202);
+    const productQueued = await product.json();
+    const productBody = await waitForResult(app, productQueued.jobId);
     assert.deepEqual(productBody.options, { mode: "multi", styling: "css", framework: "vite" });
 
     const legacy = await app.request("/v1/clones", {
@@ -127,8 +146,9 @@ test("POST /v1/clones normalizes product options and legacy aliases", async () =
       headers: { "content-type": "application/json" },
       body: JSON.stringify({ url: "https://example.com/", options: { multiPage: true, humanizeMode: "css" } }),
     });
-    assert.equal(legacy.status, 200);
-    const legacyBody = await legacy.json();
+    assert.equal(legacy.status, 202);
+    const legacyQueued = await legacy.json();
+    const legacyBody = await waitForResult(app, legacyQueued.jobId);
     assert.deepEqual(legacyBody.options, { mode: "multi", styling: "css", framework: "next" });
   } finally {
     store.clear();

packages/api/test/mcp.test.ts

@@ -52,12 +52,18 @@ test("MCP: list-then-read + bundle contract (never floods context)", async () =>
     // clone_website → jobId + status only (no files).
     const cw = parse(await client.callTool({ name: "clone_website", arguments: { url: "https://example.com/", options: {} } }));
     assert.ok(cw.jobId);
-    assert.equal(cw.status, "succeeded");
-    assert.ok(!("files" in cw));
+    assert.equal(cw.status, "queued");
     const jobId = cw.jobId;
 
-    // status
-    const status = parse(await client.callTool({ name: "get_clone_status", arguments: { jobId } }));
+    let status = parse(await client.callTool({ name: "get_clone_status", arguments: { jobId } }));
+    for (let i = 0; i < 200 && status.status !== "succeeded"; i++) {
+      await new Promise((r) => setTimeout(r, 5));
+      status = parse(await client.callTool({ name: "get_clone_status", arguments: { jobId } }));
+    }
+    assert.equal(status.status, "succeeded");
+
+    // status (re-fetch after completion)
+    status = parse(await client.callTool({ name: "get_clone_status", arguments: { jobId } }));
     assert.equal(status.status, "succeeded");
 
     // get_clone_result → metadata only, NO file contents.

packages/core/src/options.ts

@@ -9,6 +9,7 @@ export type ResolvedCloneOptions = CloneOptions & {
   interactions: boolean;
   components: boolean;
   motion: boolean;
+  preview: boolean;
 };
 
 export function resolveCloneMode(options: CloneOptions = {}): CloneMode {
@@ -53,5 +54,8 @@ export function resolveCloneOptions(options: CloneOptions = {}): ResolvedCloneOp
     interactions: options.interactions ?? true,
     components: options.components ?? true,
     motion: options.motion ?? true,
+    // Preview builds are the single-page product surface; multi-page exports can be
+    // large, so previewing a site clone stays an explicit opt-in.
+    preview: options.preview ?? mode === "single",
   };
 }

packages/core/src/types.ts

@@ -26,6 +26,9 @@ export type CloneOptions = {
   mode?: CloneMode;
   styling?: CloneStyling;
   framework?: CloneFramework;
+  /** Build a browsable static export of the clone into `public/app-preview/`
+   *  (served by the API's app-preview route). Defaults ON for single-page clones. */
+  preview?: boolean;
   verify?: boolean;
   /** DB/worker mode: persist the clone first, then attach verify in the background. */
   asyncVerify?: boolean;
@@ -75,7 +78,7 @@ export type CaptureSanity = {
   blocked: boolean; // bot/egress wall text detected
 };
 
-export type CloneTimings = { captureMs: number; generateMs: number; verifyMs?: number };
+export type CloneTimings = { captureMs: number; generateMs: number; verifyMs?: number; previewMs?: number };
 
 export type RouteInfo = { route: string; representativeOf?: string };
 

packages/db/migrations/0002_productive_wallflower.sql

@@ -0,0 +1,10 @@
+CREATE TABLE "job_events" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"job_id" uuid NOT NULL,
+	"seq" integer NOT NULL,
+	"payload" jsonb NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "job_events" ADD CONSTRAINT "job_events_job_id_jobs_id_fk" FOREIGN KEY ("job_id") REFERENCES "public"."jobs"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "job_events_job_id_seq_idx" ON "job_events" USING btree ("job_id","seq");

packages/db/migrations/meta/0002_snapshot.json

@@ -0,0 +1,461 @@
+{
+  "id": "de9b94b8-cefb-4d2a-a848-79a552976943",
+  "prevId": "e076bd1e-a7ce-40ab-abd1-9eb11d00ddb9",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.api_keys": {
+      "name": "api_keys",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "key_hash": {
+          "name": "key_hash",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "label": {
+          "name": "label",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "rate_limit": {
+          "name": "rate_limit",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "revoked_at": {
+          "name": "revoked_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "api_keys_key_hash_unique": {
+          "name": "api_keys_key_hash_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "key_hash"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.cache": {
+      "name": "cache",
+      "schema": "",
+      "columns": {
+        "cache_key": {
+          "name": "cache_key",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "job_id": {
+          "name": "job_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "url": {
+          "name": "url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "options_hash": {
+          "name": "options_hash",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "compiler_version": {
+          "name": "compiler_version",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "cache_job_id_jobs_id_fk": {
+          "name": "cache_job_id_jobs_id_fk",
+          "tableFrom": "cache",
+          "tableTo": "jobs",
+          "columnsFrom": [
+            "job_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.clones": {
+      "name": "clones",
+      "schema": "",
+      "columns": {
+        "job_id": {
+          "name": "job_id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "url": {
+          "name": "url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "route_count": {
+          "name": "route_count",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 1
+        },
+        "file_manifest": {
+          "name": "file_manifest",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "bundle_s3_key": {
+          "name": "bundle_s3_key",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "verify": {
+          "name": "verify",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "capture_meta": {
+          "name": "capture_meta",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "clones_job_id_jobs_id_fk": {
+          "name": "clones_job_id_jobs_id_fk",
+          "tableFrom": "clones",
+          "tableTo": "jobs",
+          "columnsFrom": [
+            "job_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.job_events": {
+      "name": "job_events",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "job_id": {
+          "name": "job_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "seq": {
+          "name": "seq",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "payload": {
+          "name": "payload",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "job_events_job_id_seq_idx": {
+          "name": "job_events_job_id_seq_idx",
+          "columns": [
+            {
+              "expression": "job_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "seq",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "job_events_job_id_jobs_id_fk": {
+          "name": "job_events_job_id_jobs_id_fk",
+          "tableFrom": "job_events",
+          "tableTo": "jobs",
+          "columnsFrom": [
+            "job_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.jobs": {
+      "name": "jobs",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "kind": {
+          "name": "kind",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "url": {
+          "name": "url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "options": {
+          "name": "options",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'{}'::jsonb"
+        },
+        "status": {
+          "name": "status",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'queued'"
+        },
+        "cache_key": {
+          "name": "cache_key",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "attempts": {
+          "name": "attempts",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "error": {
+          "name": "error",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "compiler_version": {
+          "name": "compiler_version",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "timings": {
+          "name": "timings",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "started_at": {
+          "name": "started_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "finished_at": {
+          "name": "finished_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.signup_tokens": {
+      "name": "signup_tokens",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "token_hash": {
+          "name": "token_hash",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "consumed_at": {
+          "name": "consumed_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "signup_tokens_token_hash_unique": {
+          "name": "signup_tokens_token_hash_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "token_hash"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}

packages/db/migrations/meta/_journal.json

@@ -15,6 +15,13 @@
       "when": 1782790200000,
       "tag": "0001_signup_tokens",
       "breakpoints": true
+    },
+    {
+      "idx": 2,
+      "version": "7",
+      "when": 1783202414928,
+      "tag": "0002_productive_wallflower",
+      "breakpoints": true
     }
   ]
-}
+}

packages/db/package.json

@@ -27,7 +27,7 @@
   "dependencies": {
     "drizzle-orm": "^0.45.2",
     "pg": "^8.13.1",
-    "pg-boss": "^12.25.1"
+    "pg-boss": "^10.1.5"
   },
   "devDependencies": {
     "@cloner/test-utils": "*",

packages/db/src/queue.ts

@@ -31,13 +31,23 @@ export async function enqueueClone(boss: PgBoss, jobId: string): Promise<string
 }
 
 /** Register the worker handler. Normalizes pg-boss v9 (single job) vs v10 (array)
- *  callback shapes so the consumer just gets a jobId. */
-export async function workClone(boss: PgBoss, handler: (jobId: string) => Promise<void>): Promise<string> {
-  return boss.work(CLONE_QUEUE, async (job: unknown) => {
-    const arr = Array.isArray(job) ? job : [job];
-    for (const j of arr) {
-      const data = (j as { data?: ClonePayload }).data;
-      if (data?.jobId) await handler(data.jobId);
-    }
-  });
+ *  callback shapes so the consumer just gets a jobId.
+ *
+ *  `concurrency` registers that many independent pollers on the queue, so up to
+ *  N jobs run at once in this process with no head-of-line blocking (each poller
+ *  fetches its next job as soon as its current one finishes). */
+export async function workClone(boss: PgBoss, handler: (jobId: string) => Promise<void>, concurrency = 1): Promise<string[]> {
+  const pollers: string[] = [];
+  for (let i = 0; i < Math.max(1, concurrency); i++) {
+    pollers.push(
+      await boss.work(CLONE_QUEUE, async (job: unknown) => {
+        const arr = Array.isArray(job) ? job : [job];
+        for (const j of arr) {
+          const data = (j as { data?: ClonePayload }).data;
+          if (data?.jobId) await handler(data.jobId);
+        }
+      }),
+    );
+  }
+  return pollers;
 }

packages/db/src/repo.ts

@@ -1,6 +1,6 @@
-import { and, desc, eq, gt, isNull, sql } from "drizzle-orm";
+import { and, desc, eq, gt, inArray, isNull, sql } from "drizzle-orm";
 import type { Db } from "./client.js";
-import { jobs, clones, cache, apiKeys, signupTokens, type Job, type NewJob, type Clone, type NewClone, type CacheRow, type ApiKey, type SignupToken } from "./schema.js";
+import { jobs, clones, cache, apiKeys, signupTokens, jobEvents, type Job, type NewJob, type Clone, type NewClone, type CacheRow, type ApiKey, type SignupToken } from "./schema.js";
 
 // ---- jobs ----
 
@@ -40,6 +40,19 @@ export async function listJobs(db: Db, limit = 50): Promise<Job[]> {
   return db.select().from(jobs).orderBy(desc(jobs.createdAt)).limit(limit);
 }
 
+/** The newest still-active (queued/running) job for a cache key, if any — the
+ *  in-flight dedup lookup: identical submits attach to it instead of enqueueing
+ *  a duplicate capture. */
+export async function findActiveJobByCacheKey(db: Db, key: string): Promise<Job | undefined> {
+  const [row] = await db
+    .select()
+    .from(jobs)
+    .where(and(eq(jobs.cacheKey, key), inArray(jobs.status, ["queued", "running"])))
+    .orderBy(desc(jobs.createdAt))
+    .limit(1);
+  return row;
+}
+
 export async function deleteJob(db: Db, id: string): Promise<boolean> {
   const rows = await db.delete(jobs).where(eq(jobs.id, id)).returning({ id: jobs.id });
   return rows.length > 0;
@@ -111,3 +124,24 @@ export async function consumeSignupToken(db: Db, tokenHash: string): Promise<Sig
     .returning();
   return row;
 }
+
+// ---- job events ----
+
+export async function appendJobEvent(db: Db, jobId: string, payload: Record<string, unknown>): Promise<number> {
+  const [row] = await db
+    .select({ n: sql<number>`coalesce(max(${jobEvents.seq}), 0)` })
+    .from(jobEvents)
+    .where(eq(jobEvents.jobId, jobId));
+  const seq = (row?.n ?? 0) + 1;
+  await db.insert(jobEvents).values({ jobId, seq, payload: { t: Date.now(), ...payload } });
+  return seq;
+}
+
+export async function listJobEvents(db: Db, jobId: string, after = 0): Promise<Array<Record<string, unknown>>> {
+  const rows = await db
+    .select()
+    .from(jobEvents)
+    .where(and(eq(jobEvents.jobId, jobId), sql`${jobEvents.seq} > ${after}`))
+    .orderBy(jobEvents.seq);
+  return rows.map((r) => r.payload as Record<string, unknown>);
+}

packages/db/src/schema.ts

@@ -1,4 +1,4 @@
-import { pgTable, text, jsonb, integer, timestamp, uuid } from "drizzle-orm/pg-core";
+import { pgTable, text, jsonb, integer, timestamp, uuid, index } from "drizzle-orm/pg-core";
 
 /** Job lifecycle row. Status mirrors the queue; `cacheKey` ties it to the cache row.
  *  `options`/`timings` are jsonb (the service's typed shapes). */
@@ -66,6 +66,17 @@ export const signupTokens = pgTable("signup_tokens", {
   consumedAt: timestamp("consumed_at", { withTimezone: true }),
 });
 
+/** Structured clone progress events (mirrors in-memory backend event stream). */
+export const jobEvents = pgTable("job_events", {
+  id: uuid("id").defaultRandom().primaryKey(),
+  jobId: uuid("job_id")
+    .notNull()
+    .references(() => jobs.id, { onDelete: "cascade" }),
+  seq: integer("seq").notNull(),
+  payload: jsonb("payload").notNull(),
+  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+}, (t) => [index("job_events_job_id_seq_idx").on(t.jobId, t.seq)]);
+
 export type Job = typeof jobs.$inferSelect;
 export type NewJob = typeof jobs.$inferInsert;
 export type Clone = typeof clones.$inferSelect;
@@ -74,3 +85,4 @@ export type CacheRow = typeof cache.$inferSelect;
 export type ApiKey = typeof apiKeys.$inferSelect;
 export type SignupToken = typeof signupTokens.$inferSelect;
 export type NewSignupToken = typeof signupTokens.$inferInsert;
+export type JobEvent = typeof jobEvents.$inferSelect;

packages/storage/package.json

@@ -24,8 +24,8 @@
   },
   "dependencies": {
     "@cloner/core": "*",
-    "@aws-sdk/client-s3": "^3.1079.0",
-    "@aws-sdk/s3-request-presigner": "^3.1079.0"
+    "@aws-sdk/client-s3": "^3.726.0",
+    "@aws-sdk/s3-request-presigner": "^3.726.0"
   },
   "devDependencies": {
     "tsx": "4.22.4",

packages/worker/src/env.ts

@@ -11,11 +11,15 @@ export type WorkerEnv = {
   /** persistent entry-capture cache dir (the single→multi speed path). "" disables it. */
   captureCacheDir: string;
   tier: string;
+  /** concurrent clone jobs in this process (WORKER_CONCURRENCY, default 1). Each
+   *  slot runs a full Chromium capture — size the container accordingly. */
+  concurrency: number;
 };
 
 export function loadWorkerEnv(): WorkerEnv {
   const databaseUrl = process.env.DATABASE_URL;
   if (!databaseUrl) throw new Error("DATABASE_URL is required for the worker");
+  const concurrency = Math.max(1, parseInt(process.env.WORKER_CONCURRENCY ?? "1", 10) || 1);
   return {
     databaseUrl,
     artifactsDir: process.env.ARTIFACTS_DIR ?? join(process.cwd(), "local-data", "artifacts"),
@@ -23,5 +27,6 @@ export function loadWorkerEnv(): WorkerEnv {
     harnessDir: process.env.HARNESS_DIR ?? join(process.cwd(), "local-data", "harness"),
     captureCacheDir: process.env.CAPTURE_CACHE_DIR ?? join(process.cwd(), "local-data", "capture-cache"),
     tier: process.env.VERIFY_TIER ?? "stage2",
+    concurrency,
   };
 }

packages/worker/src/processJob.ts

@@ -37,7 +37,16 @@ export async function processCloneJob(deps: ProcessDeps, jobId: string): Promise
     const options = (job.options ?? {}) as CloneOptions;
     // Provision the isolated harness only when this job actually verifies (build).
     const harnessDir = (options.verify || options.asyncVerify) && deps.harnessProvider ? await deps.harnessProvider() : undefined;
-    const result = await deps.runJob({ url: job.url, options, runsDir: base, harnessDir, tier: deps.tier, captureCacheDir: deps.captureCacheDir || undefined, captureCacheTtlMs: deps.cacheTtlMs });
+    const result = await deps.runJob({
+      url: job.url,
+      options,
+      runsDir: base,
+      harnessDir,
+      tier: deps.tier,
+      captureCacheDir: deps.captureCacheDir || undefined,
+      captureCacheTtlMs: deps.cacheTtlMs,
+      log: (e) => { void repo.appendJobEvent(db, jobId, e); },
+    });
 
     const manifest = await store.putClone(jobId, result.files);
     const envelope = { files: manifest.files, routes: result.routes, bundleKey: manifest.bundleKey };

packages/worker/src/worker.ts

@@ -1,3 +1,4 @@
+import { join } from "node:path";
 import { runCloneJob } from "@cloner/core";
 import { createDb, createBoss, workClone } from "@cloner/db";
 import { artifactStoreFromEnv } from "@cloner/storage";
@@ -16,13 +17,32 @@ async function main(): Promise<void> {
     store,
     runJob: runCloneJob,
     cacheTtlMs: env.cacheStaleAfterMs,
-    harnessProvider: makeHarnessProvider(env.harnessDir),
     captureCacheDir: env.captureCacheDir,
     tier: env.tier,
   };
 
-  await workClone(boss, (jobId) => processCloneJob(deps, jobId));
-  console.log(JSON.stringify({ event: "worker_started", artifactsDir: env.artifactsDir, harnessDir: env.harnessDir, cacheStaleAfterMs: env.cacheStaleAfterMs }));
+  // One harness per concurrency slot: verify builds must not share a harness dir
+  // (concurrent framework builds collide). With concurrency 1 this is the plain
+  // harnessDir, preserving existing layouts. At most `concurrency` jobs run at
+  // once (one per poller), so a free slot always exists at checkout.
+  const harnesses = Array.from({ length: env.concurrency }, (_, i) =>
+    makeHarnessProvider(env.concurrency > 1 ? join(env.harnessDir, `slot-${i}`) : env.harnessDir),
+  );
+  const freeSlots = harnesses.map((_, i) => i);
+
+  await workClone(
+    boss,
+    async (jobId) => {
+      const slot = freeSlots.pop() ?? 0;
+      try {
+        await processCloneJob({ ...deps, harnessProvider: harnesses[slot]! }, jobId);
+      } finally {
+        freeSlots.push(slot);
+      }
+    },
+    env.concurrency,
+  );
+  console.log(JSON.stringify({ event: "worker_started", concurrency: env.concurrency, artifactsDir: env.artifactsDir, harnessDir: env.harnessDir, cacheStaleAfterMs: env.cacheStaleAfterMs }));
 }
 
 main().catch((e) => {