chore: import upstream snapshot with attribution

2026-07-13 12:58:35 +08:00
commit 85453da49f
4031 changed files with 710987 additions and 0 deletions
@@ -0,0 +1,533 @@
+#!/usr/bin/env node
+// build-frame.mjs — Step 2 design system in ONE command. The LLM only chooses a
+// preset; this does the deterministic rest: copy the preset's FRAME.md → frame.md,
+// remix its colors/typography onto the project's brand tokens, copy the preset's
+// caption-skin.html, and self-validate. "Strict on brand" is deterministic, so it's
+// a script, not LLM hand-editing (which mis-copies hex / breaks keys).
+//
+//   node build-frame.mjs --preset capsule --hyperframes .
+//     [--tokens capture/extracted/tokens.json]  [--preset-dir <abs path to frame-presets>]
+//
+// Remix rule — ONLY `colors:` values and `typography:` fontFamily change; keys,
+// structure, geometry, and components are untouched:
+//   colors — map brand tokens onto the preset's keys BY ROLE: the ink-role key takes
+//            the brand ink (darkest/ink-named), the canvas-role key takes the brand
+//            canvas (lightest), and every other color is repainted with the nearest
+//            brand accent's hue+saturation while KEEPING its own lightness, so tint
+//            families (sun / sun-soft / haze) stay a family. Empty brand colors → the
+//            preset palette is kept (it is already a complete, good design).
+//   fonts  — the preset's display family → the brand display font, its body family →
+//            the brand body font, wherever they appear. Empty brand fonts → kept.
+
+import {
+  copyFileSync,
+  existsSync,
+  mkdirSync,
+  readdirSync,
+  readFileSync,
+  writeFileSync,
+} from "node:fs";
+import { dirname, join, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+import {
+  brandRolesFromStats,
+  chroma,
+  lum,
+  parseColors,
+  parseFonts,
+  pickAccent,
+  semanticColors,
+  STATUS_ROLE_KEY,
+  UA_DEFAULT_COLORS,
+} from "./lib/tokens.mjs";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const argv = process.argv.slice(2);
+const flag = (name, def) => {
+  const i = argv.indexOf(`--${name}`);
+  return i >= 0 && i + 1 < argv.length ? argv[i + 1] : def;
+};
+const die = (m) => {
+  console.error(`✗ build-frame: ${m}`);
+  process.exit(1);
+};
+
+const presetName = flag("preset", null);
+const hyperframesDir = resolve(flag("hyperframes", "."));
+const presetDir = resolve(
+  flag("preset-dir", join(__dirname, "../../hyperframes-creative/frame-presets")),
+);
+const tokensPath = resolve(flag("tokens", join(hyperframesDir, "capture/extracted/tokens.json")));
+
+if (!presetName) die("--preset <name> is required");
+const presetFrame = join(presetDir, presetName, "FRAME.md");
+if (!existsSync(presetFrame)) {
+  const avail = existsSync(presetDir)
+    ? readdirSync(presetDir, { withFileTypes: true })
+        .filter((d) => d.isDirectory())
+        .map((d) => d.name)
+    : [];
+  die(
+    `no FRAME.md for preset "${presetName}" under ${presetDir}\n  available: ${avail.join(", ")}`,
+  );
+}
+
+// ── HSL helpers (recolor = brand hue+sat, original lightness) ──────────────────
+function hexToHsl(hex) {
+  const m = /^#?([0-9a-fA-F]{6})$/.exec(String(hex).trim());
+  if (!m) return null;
+  const n = parseInt(m[1], 16);
+  const r = ((n >> 16) & 255) / 255,
+    g = ((n >> 8) & 255) / 255,
+    b = (n & 255) / 255;
+  const max = Math.max(r, g, b),
+    min = Math.min(r, g, b),
+    d = max - min;
+  let h = 0;
+  const l = (max + min) / 2;
+  const s = d === 0 ? 0 : l > 0.5 ? d / (2 - max - min) : d / (max + min);
+  if (d !== 0) {
+    h = max === r ? (g - b) / d + (g < b ? 6 : 0) : max === g ? (b - r) / d + 2 : (r - g) / d + 4;
+    h *= 60;
+  }
+  return { h, s, l };
+}
+function hslToHex(h, s, l) {
+  h = (((h % 360) + 360) % 360) / 360;
+  const hue = (p, q, t) => {
+    t = (t + 1) % 1;
+    if (t < 1 / 6) return p + (q - p) * 6 * t;
+    if (t < 1 / 2) return q;
+    if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
+    return p;
+  };
+  let r, g, b;
+  if (s === 0) {
+    r = g = b = l;
+  } else {
+    const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
+    const p = 2 * l - q;
+    r = hue(p, q, h + 1 / 3);
+    g = hue(p, q, h);
+    b = hue(p, q, h - 1 / 3);
+  }
+  const to = (x) =>
+    Math.round(x * 255)
+      .toString(16)
+      .padStart(2, "0")
+      .toUpperCase();
+  return `#${to(r)}${to(g)}${to(b)}`;
+}
+const hueDist = (a, b) => {
+  const d = Math.abs(a - b) % 360;
+  return d > 180 ? 360 - d : d;
+};
+function hexToRgb(hex) {
+  const m = /^#?([0-9a-fA-F]{6})$/.exec(String(hex).trim());
+  if (!m) return null;
+  const n = parseInt(m[1], 16);
+  return [(n >> 16) & 255, (n >> 8) & 255, n & 255];
+}
+const rgbToHsl = (r, g, b) =>
+  hexToHsl("#" + [r, g, b].map((x) => Math.round(x).toString(16).padStart(2, "0")).join(""));
+// Repaint a chromatic rgba()/rgb() tint with the brand accent's RGB, keeping its alpha.
+// A near-neutral rgb (shadow / scrim overlay) is left untouched; a non-rgba string → null.
+function remapRgbaToAccent(val, brAccent, brAccent2, prAccentHsl, prAccent2Hsl) {
+  const m = /^rgba?\(\s*([\d.]+)[\s,]+([\d.]+)[\s,]+([\d.]+)\s*(?:[,/]\s*([\d.]+%?))?\s*\)$/i.exec(
+    String(val).trim(),
+  );
+  if (!m) return null;
+  const r = +m[1],
+    g = +m[2],
+    b = +m[3],
+    a = m[4];
+  if (Math.max(r, g, b) - Math.min(r, g, b) < 16) return null; // neutral overlay — keep as-is
+  const src = rgbToHsl(r, g, b);
+  const useSecond =
+    brAccent2 &&
+    prAccentHsl &&
+    prAccent2Hsl &&
+    src &&
+    hueDist(src.h, prAccent2Hsl.h) < hueDist(src.h, prAccentHsl.h);
+  const t = hexToRgb(useSecond ? brAccent2 : brAccent);
+  if (!t) return null;
+  return a !== undefined
+    ? `rgba(${t[0]}, ${t[1]}, ${t[2]}, ${a})`
+    : `rgb(${t[0]}, ${t[1]}, ${t[2]})`;
+}
+
+// ── brand tokens ──────────────────────────────────────────────────────────────
+let brandColors = [];
+let brandFonts = [];
+let brandFontWeights = []; // weights the brand text font actually ships (tokens fonts[].weights)
+let brandColorStats = []; // rich per-color usage stats (areaBg / interactiveBg / textCount …)
+// Icon/glyph fonts capture surfaces as "fonts" — they are never the brand text face
+// (webflow-icons, Font Awesome, icomoon …) and must not become display/body or contribute weights.
+const isIconFont = (name) =>
+  /(?:^|[\s_-])icons?(?:[\s_-]|$)|icomoon|font\s*-?awesome|glyphicons?|material\s*icons|feather\s*icons/i.test(
+    String(name),
+  );
+if (existsSync(tokensPath)) {
+  try {
+    const t = JSON.parse(readFileSync(tokensPath, "utf8"));
+    brandColors = (t.colors ?? [])
+      .map((c) => (typeof c === "string" ? c : (c?.hex ?? c?.value ?? "")))
+      .map((c) => String(c).trim())
+      .filter((c) => /^#?[0-9a-fA-F]{6}$/.test(c))
+      .map((c) => (c.startsWith("#") ? c : `#${c}`));
+    brandFonts = (t.fonts ?? [])
+      .map((f) => (typeof f === "string" ? f : (f?.family ?? f?.name ?? "")))
+      .map((f) => String(f).split(",")[0].replace(/['"]/g, "").trim())
+      .filter(Boolean)
+      .filter((f) => !isIconFont(f));
+    // Union of the (non-icon) brand fonts' available weights — used to clamp the preset's
+    // type ramp so a font shipping only 400/500 never faux-bolds a 600/700 heading.
+    brandFontWeights = [
+      ...new Set(
+        (t.fonts ?? [])
+          .filter((f) => f && typeof f === "object" && !isIconFont(f.family ?? f.name ?? ""))
+          .flatMap((f) => (Array.isArray(f.weights) ? f.weights : []))
+          .map((w) => parseInt(w, 10))
+          .filter((w) => Number.isFinite(w)),
+      ),
+    ].sort((a, b) => a - b);
+    brandColorStats = Array.isArray(t.colorStats) ? t.colorStats : [];
+  } catch (e) {
+    die(`tokens.json parse: ${e.message}`);
+  }
+}
+
+let md = readFileSync(presetFrame, "utf8");
+const presetColors = parseColors(md);
+const summary = [];
+
+// ── color remix ───────────────────────────────────────────────────────────────
+if (brandColors.length && presetColors.length) {
+  const pr = semanticColors(presetColors);
+  // Brand roles: prefer the function-based reading of capture colorStats (canvas =
+  // largest background, accent = top interactive bg, ink = dominant contrasting text).
+  // Fall back to the legacy luminance/chroma heuristic only when stats are absent —
+  // but pick the accent via pickAccent either way so a UA-default link color never wins.
+  const br =
+    brandRolesFromStats(brandColorStats, brandColors) ??
+    (() => {
+      // strip UA-default link colors so a stray <a> color can't become ink/canvas/accent
+      const clean = brandColors.filter((h) => !UA_DEFAULT_COLORS.has(h.toUpperCase()));
+      const s = semanticColors(clean.map((h, i) => [`c${i}`, h]));
+      return {
+        ink: s.ink,
+        canvas: s.canvas,
+        accent: pickAccent(brandColorStats, clean, [s.ink, s.canvas]) ?? s.accent,
+        accent2: s.accent2,
+      };
+    })();
+  if (!br.accent) die("accent 选取失败：品牌色里没有可用的强调色");
+  if (chroma(br.accent) <= 40) {
+    console.warn(
+      `  ⚠ accent ${br.accent} 彩度很低 (${chroma(br.accent)}) — 确认这是品牌色而非中性/默认色`,
+    );
+  }
+  // Map by LUMINANCE POLARITY. The preset's darker value takes the brand's darker value and
+  // the lighter takes the lighter — UNLESS the brand's GROUND polarity differs from the
+  // preset's. Every shipped preset is light-ground; a dark-mode brand (Linear, Vercel,
+  // Raycast…) has its canvas darker than its ink (colorStats already resolved the real
+  // ground as the largest-area background). On a polarity MISMATCH we INVERT the mapping so a
+  // light preset becomes the dark brand (canvas↔ink swap) instead of forcing the brand onto
+  // an off-brand light video; neutral/tint lightness is then mirrored (L→1−L) so the whole
+  // palette flips to the brand's ground. Same-polarity (the common case) is unchanged.
+  const darker = (a, b) => ((lum(a) ?? 0) <= (lum(b) ?? 0) ? a : b);
+  const prDark = darker(pr.ink, pr.canvas);
+  const prLight = prDark === pr.ink ? pr.canvas : pr.ink;
+  const brDark = darker(br.ink, br.canvas);
+  const brLight = brDark === br.ink ? br.canvas : br.ink;
+  const presetGroundDark = (lum(pr.canvas) ?? 255) < (lum(pr.ink) ?? 0);
+  const brandGroundDark = (lum(br.canvas) ?? 255) < (lum(br.ink) ?? 0);
+  const invert = presetGroundDark !== brandGroundDark;
+  const mapDark = invert ? brLight : brDark; // preset's dark value → this brand value
+  const mapLight = invert ? brDark : brLight; // preset's light value → this brand value
+  const flipL = (l) => (invert ? 1 - l : l); // mirror tint/neutral lightness when flipping
+  const prAccentHsl = hexToHsl(pr.accent);
+  const prAccent2Hsl = hexToHsl(pr.accent2);
+  const newByKey = new Map();
+  for (const [key, val] of presetColors) {
+    const ph = hexToHsl(val);
+    let next;
+    if (val === prDark) next = mapDark;
+    else if (val === prLight) next = mapLight;
+    else if (STATUS_ROLE_KEY.test(key))
+      // semantic status colors (green/red …) — the HUE carries the meaning; never repaint.
+      // MUST precede the accent checks: a preset's red "negative" is often its 2nd-most-chromatic
+      // color and would otherwise be claimed as accent2 and recolored to the brand hue.
+      next = val;
+    else if (val === pr.accent)
+      next = br.accent; // primary accent → the EXACT brand color
+    else if (pr.accent2 !== pr.accent && val === pr.accent2)
+      next = br.accent2; // exact 2nd accent
+    else if (!ph) {
+      // rgba()/rgb() tint → repaint its rgb with the brand accent, keep alpha (a neutral
+      // overlay is kept). A non-color non-hex value (var(), named) falls through unchanged.
+      next = remapRgbaToAccent(val, br.accent, br.accent2, prAccentHsl, prAccent2Hsl) ?? val;
+    } else if (chroma(val) < 16) {
+      // NEUTRAL source (grey text-ladder, hairline borders) → keep it NEUTRAL. Apply at most a
+      // whisper of the brand hue (sat ≤ 0.06); never the accent's full saturation — that is what
+      // turned the grey ladder into saturated blue.
+      const bh = hexToHsl(br.accent);
+      next = bh ? hslToHex(bh.h, Math.min(ph.s, 0.06), flipL(ph.l)) : val;
+    } else {
+      // chromatic tint → repaint with the nearest brand accent's hue+sat, keep THIS color's
+      // lightness so tint families stay families.
+      const useSecond =
+        pr.accent !== pr.accent2 &&
+        prAccentHsl &&
+        prAccent2Hsl &&
+        hueDist(ph.h, prAccent2Hsl.h) < hueDist(ph.h, prAccentHsl.h);
+      const bh = hexToHsl(useSecond ? br.accent2 : br.accent);
+      next = bh ? hslToHex(bh.h, bh.s, flipL(ph.l)) : val;
+    }
+    if (next !== val) newByKey.set(key, next);
+  }
+  // rewrite only the value of each colors: line; everything else byte-identical.
+  let inBlock = false;
+  md = md
+    .split(/\r?\n/)
+    .map((line) => {
+      if (/^colors:\s*$/.test(line)) {
+        inBlock = true;
+        return line;
+      }
+      if (inBlock && /^\S/.test(line)) inBlock = false;
+      if (!inBlock) return line;
+      const m = line.match(
+        /^(\s+)([\w-]+):\s*(?:"[^"]*"|'[^']*'|#[0-9a-fA-F]{3,8}|rgba?\([^)]*\)|[^#\n]*?)(\s+#.*)?$/,
+      );
+      if (m && newByKey.has(m[2])) return `${m[1]}${m[2]}: "${newByKey.get(m[2])}"${m[3] ?? ""}`;
+      return line;
+    })
+    .join("\n");
+  summary.push(
+    `colors: ${invert ? "INVERTED (dark-mode brand on light preset) · " : ""}dark ${prDark}→${mapDark}, light ${prLight}→${mapLight}, accent ${pr.accent}→${br.accent}` +
+      ` (${newByKey.size}/${presetColors.length} keys repainted${brandColorStats.length ? ", via colorStats" : ""})`,
+  );
+} else {
+  summary.push(
+    brandColors.length
+      ? "colors: preset has no parseable colors — kept"
+      : "colors: no brand colors — preset palette kept",
+  );
+}
+
+// ── font remix ────────────────────────────────────────────────────────────────
+if (brandFonts.length) {
+  const pf = parseFonts(md);
+  const strip = (q) => (q ? q.replace(/^"|"$/g, "") : null);
+  const pDisplay = strip(pf.display);
+  const pBody = strip(pf.body);
+  const pMono = strip(pf.mono);
+  // A monospace brand face is for code / labels / chrome — never the reading display or body.
+  // Split the brand fonts: the primary NON-mono family carries display AND body (the common
+  // single-sans case, e.g. Inter for everything), and a captured mono (Berkeley Mono,
+  // JetBrains Mono…) is routed onto the preset's mono role instead of turning the body
+  // monospace. (Distinct display/body brands still resolve to a clean sans; hand-tune the
+  // display in frame.md if a separate display face is wanted.)
+  const isMonoFont = (n) =>
+    /(?:^|[\s_-])mono(?:[\s_-]|$)|monospace|consol|courier|menlo|monaco|jetbrains|berkeley|space\s*mono|ibm\s*plex\s*mono|sf\s*mono|roboto\s*mono|source\s*code|fira\s*code|geist\s*mono|dm\s*mono/i.test(
+      String(n),
+    );
+  const nonMono = brandFonts.filter((f) => !isMonoFont(f));
+  const monoFonts = brandFonts.filter(isMonoFont);
+  const bDisplay = nonMono[0] ?? brandFonts[0];
+  const bBody = nonMono[0] ?? brandFonts[0];
+  const bMono = monoFonts[0] ?? null;
+  const escRe = (s) => s.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+  // Replace the preset family as a WHOLE WORD/PHRASE everywhere — frontmatter values,
+  // component strings like "Space Grotesk 600", AND prose — case-sensitive with word
+  // boundaries so a single-word family ("Inter") can never corrupt a substring
+  // ("interactive"). Quote-exact replace alone missed names baked into longer strings + prose.
+  const swapFamily = (from, to) => {
+    if (from && to && from !== to) md = md.replace(new RegExp(`\\b${escRe(from)}\\b`, "g"), to);
+  };
+  swapFamily(pDisplay, bDisplay);
+  if (pBody !== pDisplay) swapFamily(pBody, bBody);
+  // route the brand mono onto the preset's mono role (only if the preset has a DISTINCT mono
+  // family — never collapse body/display into mono)
+  if (bMono && pMono && pMono !== pBody && pMono !== pDisplay) swapFamily(pMono, bMono);
+  summary.push(
+    `fonts: display ${pDisplay}→${bDisplay}, body ${pBody}→${bBody}` +
+      (bMono && pMono && pMono !== pBody && pMono !== pDisplay ? `, mono ${pMono}→${bMono}` : ""),
+  );
+} else {
+  summary.push("fonts: no brand fonts — preset fonts kept");
+}
+
+// ── cap type weights to the brand font's available faces ──────────────────────
+// The remix swaps the font FAMILY but keeps the preset's weights; a brand font that ships
+// only e.g. 400/500 would faux-bold every 600/700 heading. Clamp each `typography:` weight
+// to the NEAREST weight the brand font actually provides (tokens.json fonts[].weights).
+if (brandFonts.length && brandFontWeights.length) {
+  const avail = brandFontWeights;
+  const nearest = (n) =>
+    avail.reduce((best, w) => {
+      const dw = Math.abs(w - n),
+        db = Math.abs(best - n);
+      return dw < db || (dw === db && w > best) ? w : best;
+    }, avail[0]);
+  let capped = 0;
+  const cap = (num) => {
+    const n = parseInt(num, 10);
+    if (avail.includes(n)) return String(n);
+    const c = nearest(n);
+    if (c !== n) capped++;
+    return String(c);
+  };
+  let inType = false;
+  md = md
+    .split(/\r?\n/)
+    .map((line) => {
+      if (/^typography:\s*$/.test(line)) {
+        inType = true;
+        return line;
+      }
+      if (inType && /^\S/.test(line)) inType = false;
+      let out = line;
+      // (a) structured `weight: NNN` in the typography ramp
+      if (inType) out = out.replace(/(\bweight:\s*)(\d{3})\b/g, (m, pfx, num) => pfx + cap(num));
+      // (b) a weight baked into a quoted `typography:` component value, e.g.
+      //     cta-button → typography: "Basier Square 600"  (NNN not followed by a unit like px)
+      out = out.replace(
+        /(typography:\s*"[^"]*?\b)(\d{3})\b(?![a-z%])/gi,
+        (m, pfx, num) => pfx + cap(num),
+      );
+      return out;
+    })
+    .join("\n");
+  if (capped)
+    summary.push(`fonts: capped ${capped} type weight(s) to brand faces {${avail.join(", ")}}`);
+}
+
+// ── brand-adaptation note ─────────────────────────────────────────────────────
+// The remix fixes the NORMATIVE frontmatter, but the preset's PROSE still carries its
+// original weight ranges / color-names. Prepend a short "frontmatter is truth" header so a
+// reader (or frame worker) interprets any lingering preset prose THROUGH the brand values —
+// instead of fragile per-sentence prose surgery.
+if (brandFonts.length || (brandColors.length && presetColors.length)) {
+  const bD = brandFonts[0];
+  const bB = brandFonts[1] ?? brandFonts[0];
+  const note =
+    `## Brand adaptation (READ FIRST — the frontmatter is the source of truth)\n\n` +
+    `This is the **${presetName}** preset remixed onto the captured brand. The YAML frontmatter above ` +
+    `(colors · typography · components) is **normative and already correct — use it verbatim.** The prose ` +
+    `below is the ORIGINAL preset's intent; read it THROUGH the frontmatter:\n\n` +
+    (brandFonts.length
+      ? `- **Fonts** — already set to **${bD}** (display) / **${bB}** (body); ignore any preset font name lingering in prose.\n`
+      : "") +
+    (brandFontWeights.length
+      ? `- **Weights** — the brand font ships \`{${brandFontWeights.join(", ")}}\` only; every weight is clamped to these — ignore higher preset weights (e.g. 600/700) in prose.\n`
+      : "") +
+    `- **Colors** — use the frontmatter hex; preset color NAMES in prose (e.g. "cobalt", "cream") mean the remapped brand values.\n`;
+  if (/^# .*$/m.test(md)) md = md.replace(/^# .*$/m, (m) => `${m}\n\n${note}`);
+  else md = `${note}\n${md}`;
+  summary.push("brand-adaptation note prepended");
+}
+
+// ── stage brand font files + emit @font-face ──────────────────────────────────
+// A brand font is rarely a Google font, so renaming the family in frame.md is not enough:
+// nothing loads the actual face. If the capture downloaded font files, copy them to
+// assets/fonts/ under CLEAN, weight-named names (so captions.mjs' family-prefix matcher
+// finds them too) and append a ready-to-paste, ROOT-RELATIVE @font-face block to frame.md.
+if (brandFonts.length) {
+  const norm = (s) =>
+    String(s)
+      .toLowerCase()
+      .replace(/[^a-z0-9]/g, "");
+  const extOf = (f) => (f.match(/\.(woff2|woff|ttf|otf)$/i)?.[1] ?? "").toLowerCase();
+  const FMT = { woff2: "woff2", woff: "woff", ttf: "truetype", otf: "opentype" };
+  const weightInfo = (name) => {
+    const s = name.toLowerCase();
+    if (/black|heavy|ultra|extrabold/.test(s)) return { n: 800, w: "ExtraBold" };
+    if (/semibold|demibold/.test(s)) return { n: 600, w: "SemiBold" };
+    if (/bold/.test(s)) return { n: 700, w: "Bold" };
+    if (/medium/.test(s)) return { n: 500, w: "Medium" };
+    if (/light|thin/.test(s)) return { n: 300, w: "Light" };
+    return { n: 400, w: "Regular" };
+  };
+  const fams = [...new Set(brandFonts)];
+  const srcDirs = [
+    join(hyperframesDir, "capture/assets/fonts"),
+    join(hyperframesDir, "assets/fonts"),
+  ].filter((d) => existsSync(d));
+  const files = [];
+  for (const d of srcDirs)
+    for (const f of readdirSync(d).sort()) if (extOf(f)) files.push({ d, f });
+  // Single family → all font files belong to it (the common captured case, hash-named files
+  // included). Multiple families → assign each file to the longest family key its name contains.
+  const ranked = [...fams].sort((a, b) => norm(b).length - norm(a).length);
+  const famOf = (f) =>
+    fams.length === 1 ? fams[0] : ranked.find((x) => norm(f).includes(norm(x)));
+  const outDir = join(hyperframesDir, "assets/fonts");
+  const faces = [];
+  const stagedNames = new Set();
+  for (const { d, f } of files) {
+    const fam = famOf(f);
+    if (!fam) continue;
+    const { n, w } = weightInfo(f);
+    const clean = `${fam.replace(/[^A-Za-z0-9]/g, "")}-${w}.${extOf(f)}`;
+    if (stagedNames.has(clean)) continue;
+    mkdirSync(outDir, { recursive: true });
+    if (!existsSync(join(outDir, clean))) copyFileSync(join(d, f), join(outDir, clean));
+    stagedNames.add(clean);
+    faces.push(
+      `@font-face{font-family:"${fam}";font-weight:${n};font-style:normal;font-display:block;src:url("assets/fonts/${clean}") format("${FMT[extOf(f)]}");}`,
+    );
+  }
+  if (faces.length) {
+    md +=
+      `\n\n## Font loading (auto-generated)\n\n` +
+      `The brand font ships as local files in \`assets/fonts/\` — do NOT link Google Fonts for it. ` +
+      `Paste this \`<style>\` into every frame's \`<head>\`/\`<template>\` (captions use the same files) ` +
+      `so \`font-family\` resolves in preview, snapshot, and render alike:\n\n` +
+      "```html\n<style>\n" +
+      faces.join("\n") +
+      "\n</style>\n```\n";
+    summary.push(
+      `fonts: staged ${stagedNames.size} face(s) → assets/fonts/ + @font-face in frame.md`,
+    );
+  }
+}
+
+// ── write frame.md ────────────────────────────────────────────────────────────
+const framePath = join(hyperframesDir, "frame.md");
+writeFileSync(framePath, md);
+
+// ── copy caption-skin.html ────────────────────────────────────────────────────
+const presetSkin = join(presetDir, presetName, "caption-skin.html");
+let skinCopied = false;
+if (existsSync(presetSkin)) {
+  const skinDir = join(hyperframesDir, ".hyperframes");
+  mkdirSync(skinDir, { recursive: true });
+  copyFileSync(presetSkin, join(skinDir, "caption-skin.html"));
+  skinCopied = true;
+}
+
+// ── self-validate ─────────────────────────────────────────────────────────────
+const outColors = parseColors(md);
+if (outColors.length !== presetColors.length) {
+  die(`color keys changed (${presetColors.length}→${outColors.length}) — keys must be preserved`);
+}
+const outRoles = semanticColors(outColors);
+const li = lum(outRoles.ink),
+  lc = lum(outRoles.canvas);
+// ink (type) and canvas (ground) must differ enough to READ — in EITHER direction. A
+// light-mode spec has ink darker than canvas; a dark-mode spec (the polarity flip above)
+// the reverse. Assert luminance SEPARATION, not a fixed polarity.
+if (li != null && lc != null && Math.abs(li - lc) < 40) {
+  die(
+    `ink (${outRoles.ink}, lum ${li.toFixed(0)}) and canvas (${outRoles.canvas}, lum ${lc.toFixed(0)}) lack contrast — bad brand mapping`,
+  );
+}
+
+console.log(`✓ build-frame: ${presetName} → ${framePath}`);
+for (const s of summary) console.log(`  ${s}`);
+console.log(
+  `  .hyperframes/caption-skin.html: ${skinCopied ? "copied" : "preset ships none — captions will use the default pill"}`,
+);
+console.log(`  self-check: keys preserved, ink/canvas contrast ok ✓`);