Module

Set content.lane first:

• vector (default) — stylized region shapes, no real imagery. Native + live in HF, cheap. asset_needs: [].
• basemap — needs real satellite/dark tiles, globe, or zoom-to-real-place. asset_needs: [{ type: "map-bake", … }]. Bake the imagery in Source: HF forbids render-time network and requires determinism, so live tiles (which re-fetch and can change per render) can’t be the imagery layer — baking freezes it (and is smooth as a bonus). See Basemap lane + Determinism.

content: { lane, shot: highlight|flow|choropleth|labels|flag|pin-rollout|zoom-to, regions[], points[], basemap: satellite|dark, palette, headline, overlays: [label|pin|callout-card] }.

overlays are independent of shot and work in both lanes. callout-card = a pinned card (flag chip + stat + progress bar) — this is the “documentary popup” (top #13); compose it on any zoom-to/highlight shot rather than treating it as its own shot.

Vocabulary / leans on

Vector lane (D3 + TopoJSON — reuse the existing map family, don’t duplicate):

• Reuse: us-map (+bubble/hex/flow), world-map, spain-map.
• Hand-author these (NOT in the catalog — build per the signatures below, don’t expect an add): geo-highlight (N countries colored + labels + border pulse), geo-flow (world arcs / hub network), flag-borders (flag clipped to a country), pin-rollout (cities pulse in sequence + counter).
• Signature: country fill-in stagger · pin drop + pulse ring · arc stroke-dashoffset draw-on + flyer · choropleth color reveal · viewBox zoom.

Basemap lane (MapLibre, baked in Source — validated pipeline, bake-basemap.mjs, fully env-parametric — runs for any country, not just the prototypes):

• Bake bake-basemap.mjs (puppeteer + MapLibre; env-driven: NAME STYLE COUNTRIES CENTER ZSTART ZEND PITCH BEARING FPS DUR): drive the camera zoom→hold (easeInOutCubic) and await map.once('idle') before every frame so each frame has complete tiles (Remotion delayRender technique → no tile pop). The helper resolves Chrome itself, pins deps exactly, derives the overseas-territory filter per subject, and fails loud on idle-timeout (suspect frames → non-zero exit). External deps: the pinned CDN libs (maplibre/topojson/world-atlas) + the Esri/CARTO tile endpoints are third-party — re-verify availability + ToS on any version bump. preserveDrawingBuffer:true, fadeDuration:0. The helper then encodes the frames to an all-intra MP4 itself (ffmpeg -framerate FPS -i f%04d.png -c:v libx264 -g 1 -pix_fmt yuv420p) and writes everything to $OUT (default cwd), not the skill dir → <NAME>.mp4 + <NAME>-coords.json.
• Export geo→screen at the hold view: map.project() each requested country → <NAME>-coords.json = { view, countries: [{ name, color, d (SVG path), bbox, label }] }. The camera holds static after the zoom, so these paths stay pixel-aligned. label is an approximate anchor (vertex-average of the mainland ring — for concave countries nudge per Legibility). Consume coords.countries[i]; the smooth-frde2/smooth-flag example dirs predate this helper and use a flat {fr,de,…} shape, so adapt their wiring.
• Builder: <video> basemap on track 0 + an SVG overlay that, during the hold, animates country borders (stroke-dashoffset draw-on) + fills (colour-block reveal) + labels/pins/cards — all geo-aligned via coords.json. This reproduces the Hera “satellite + animated coloured borders/callouts” look.
  • The same projected path also doubles as an SVG clipPath: clip a flag (or any texture) into the real border for flag-in-borders — a richer fill than flat colour, over real map context (validated: France tricolor over a dark basemap, smooth-flag). Export the feature’s screen bbox alongside its path so the flag stripes/texture can be sized to the country.
• Stretch / data gaps (extend bake-basemap.mjs as needed — the eval agents did): a globe intro (“start from the globe”) = MapLibre projection:{type:'globe'} for the opening phase, easing to mercator at the target (the helper defaults to mercator). Sub-national regions (states/provinces) aren’t in world-atlas (country-only) → use a Natural Earth admin-1 TopoJSON, or project centroids as pins (pin-rollout).

Build (reuse-first)

Vector: npx hyperframes add <block> → edit regions/data/palette in place. Basemap: baked map.mp4 as track-0 <video>, bind overlays to anchors.

Restraint (no cheese — this is the #1 way auto-built maps go wrong): every animated element must serve the message — region, connector, label, pin, camera. NO decorative ambient glows, background light blobs, floating particles, lens flares, or gratuitous bloom. Motion = a continuous camera move (viewBox push/zoom) + purposeful, overlapping element reveals — not a light show. Palette: color must carry meaning — a data scale (choropleth), categorical fills that distinguish regions (political map), or 1–2 accents for the subjects (highlighted countries / route) over neutral everything-else. Don’t add color as decoration (a country amber just for contrast, a glow for “energy”). The frame should read like a clean broadcast map, not a screensaver.

Legibility (hard rule): offset labels from the highlighted shape and from each other; clamp to the safe area; a callout pill must not sit on another label or a border (the eval surfaced a DE/PL “Oder–Neisse” pill overlapping the POLAND label). A key element stays readable ≥~0.3s.

Attribution (hard rule): real basemap imagery carries usage terms — bake a credit element into the composition whenever a basemap is on screen (Esri satellite → “Esri, Maxar, Earthstar Geographics”; CARTO → “© CARTO, © OpenStreetMap”). A small low-corner label (see smooth-jp). Non-negotiable for anything published.

Determinism (hard rules — each one bit us in the prototypes):

• Drive everything from the seek clock; never tl.call for stateful updates (counters, text) → proxy tween + onUpdate (tl.call freezes the timeline under HF seek).
• SVG zoom = animate viewBox (don’t hand-compute group transform origins).
• Centered overlays (cards/labels using transform: translate(-50%,…) to center): animate opacity only, or wrap in an outer centered div — GSAP animating y/scale overwrites the whole transform and kills the centering.
• Country geometry: filter to the polygon(s) in a lon/lat box around the subject — world-atlas bundles overseas territories that blow up the bbox (France + Guiana). Keep near islands (Corsica, Sicily), drop far ones. (bake-basemap.mjs anchors on the vertex-richest polygon ± KEEPMARGIN — no continent-specific constant.)
• Tile world-scale: MapLibre’s internal world width is 512·2^zoom regardless of the raster tileSize. Esri/CARTO raster → tileSize:256 (correct); a 512px / @2x / retina / vector source needs tileSize:512 or every zoom level is off by one (this silently over-zoomed a bake once — France overflowed the frame top-to-bottom).
• Antimeridian: a feature crossing ±180° (Russia, Fiji, NZ) smears under per-vertex map.project(). bake-basemap.mjs unwraps longitudes around the camera-center ref before projecting, which handles it; it still warns if a feature spans >180° even after unwrap.
• Smoothness = per-frame complete tiles + eased camera. In the bake, await map.once('idle') before each screenshot (= Remotion delayRender) and ease the camera with easeInOutCubic (= interpolate+Easing). preserveDrawingBuffer:true, fadeDuration:0, large maxTileCacheSize.
• Overlay alignment: project feature borders at a held camera and only animate the overlay during the hold — a moving camera + a fixed projected path drift apart.
• Pre-hold hidden state: an overlay revealed at the hold must be gsap.set to its hidden state at build time (scaleX:0, full stroke-dashoffset, opacity:0) — a bare fromTo does not apply its “from” until the tween starts, so the element otherwise shows at its natural (visible, mispositioned) state during the zoom-in.
• Why bake at all (the real reason — not just smoothness): baking freezes the imagery into deterministic pixels. Live raster tiles re-fetch every render and can change, and render-time network is forbidden. MapLibre does render live in HF (just janky: tiles pop, deep zooms outrun loading); exposing the engine’s per-frame onBeforeCapture hook (it exists — frameCapture.ts:~1250) would make live smooth — but it would not remove the need to freeze tiles for determinism + offline reproducibility. So onBeforeCapture would replace the smoothness role of baking, not the freeze role.

Out of scope

3D photorealistic landmarks (Cesium territory) · per-country / per-template blocks (parametrize instead) · charts (→ charts). (In-engine live MapLibre is possible but janky today — bake instead; revisit if the engine gains a per-frame ready hook.)

Register

director.md classifier line (the lane fork) + catalog-map.md maps/geo row (add the basemap lane). Phase pipeline untouched.