`, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter

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[]) {\n const gi = profile.findIndex((a) => a.label === g);\n if (gi < 0) continue;\n x += dirs[gi].x;\n y += dirs[gi].y;\n count++;\n if (profile[gi].value > domVal) { domVal = profile[gi].value; domGi = gi; }\n }\n if (count === 0) {\n const best = pick.radar.reduce((m, a, j) => (a.value > m.val ? { j, val: a.value } : m), { j: -1, val: 0 });\n domGi = best.j >= 0 ? best.j : 0;\n x = dirs[domGi].x;\n y = dirs[domGi].y;\n count = 1;\n }\n return { x, y, domGi, pick };\n });\n const SCALE = 84;\n return placed.map((p) => ({\n x: p.x * SCALE + ((p.pick.id.charCodeAt(0) % 21) - 10),\n y: p.y * SCALE + ((p.pick.id.charCodeAt(1) % 21) - 10),\n r: 4 + (p.pick.popularity ?? 0) / 100 * 8,\n gi: p.domGi,\n pick: p.pick,\n }));\n }, [picks, profile]);\n\n const draw = () => {\n const canvas = canvasRef.current;\n const wrap = wrapRef.current;\n if (!canvas || !wrap) return;\n const dpr = window.devicePixelRatio || 1;\n const W = wrap.clientWidth;\n const H = height;\n if (canvas.width !== Math.round(W * dpr) || canvas.height !== Math.round(H * dpr)) {\n canvas.width = Math.round(W * dpr);\n canvas.height = Math.round(H * dpr);\n }\n const ctx = canvas.getContext(\"2d\");\n if (!ctx) return;\n\n const { scale, vx, vy } = cam.current;\n ctx.setTransform(dpr, 0, 0, dpr, 0, 0);\n // background\n ctx.fillStyle = \"#0b0f14\";\n ctx.fillRect(0, 0, W, H);\n\n const cx = W / 2;\n const cy = H / 2;\n ctx.translate(cx, cy);\n ctx.scale(scale, scale);\n ctx.translate(-vx, -vy);\n\n // faint concentric guide rings\n ctx.strokeStyle = \"rgba(255,255,255,0.05)\";\n ctx.lineWidth = 1 / scale;\n for (const r of [150, 300, GENRE_RING]) {\n ctx.beginPath();\n ctx.arc(0, 0, Math.min(r, GENRE_RING), 0, Math.PI * 2);\n ctx.stroke();\n }\n\n // edges from you to each artist\n ctx.lineWidth = 1 / scale;\n for (const node of nodes) {\n ctx.beginPath();\n ctx.moveTo(0, 0);\n ctx.lineTo(node.x, node.y);\n ctx.strokeStyle = `hsla(${(node.gi / Math.max(1, profile.length)) * 360}, 80%, 60%, 0.12)`;\n ctx.stroke();\n }\n\n // genre rays + labels (fade out when zoomed way out or way in)\n const labelAlpha = Math.max(0, 1 - Math.abs(Math.log2(scale)) / 2.5);\n const n = Math.max(1, profile.length);\n profile.forEach((a, gi) => {\n const angle = (gi / n) * Math.PI * 2 - Math.PI / 2;\n const hx = Math.cos(angle) * GENRE_RING;\n const hy = Math.sin(angle) * GENRE_RING;\n ctx.beginPath();\n ctx.moveTo(0, 0);\n ctx.lineTo(hx, hy);\n ctx.strokeStyle = `hsla(${(gi / n) * 360}, 60%, 55%, ${0.10 * labelAlpha})`;\n ctx.lineWidth = 1 / scale;\n ctx.stroke();\n if (labelAlpha > 0.05) {\n ctx.globalAlpha = labelAlpha;\n ctx.fillStyle = `hsla(${(gi / n) * 360}, 60%, 72%, 1)`;\n ctx.font = `${13 / scale}px sans-serif`;\n ctx.textAlign = \"center\";\n ctx.textBaseline = \"middle\";\n ctx.fillText(a.label, hx * 1.12, hy * 1.12);\n ctx.globalAlpha = 1;\n }\n });\n\n // \"you\" at the center\n ctx.beginPath();\n ctx.arc(0, 0, 22, 0, Math.PI * 2);\n ctx.fillStyle = \"#34d399\";\n ctx.fill();\n ctx.strokeStyle = \"rgba(52,211,153,0.5)\";\n ctx.lineWidth = 3 / scale;\n ctx.stroke();\n if (scale > 1.2) {\n ctx.fillStyle = \"#a7f3d0\";\n ctx.font = `${12 / scale}px sans-serif`;\n ctx.textAlign = \"center\";\n ctx.textBaseline = \"bottom\";\n ctx.fillText(\"you\", 0, -26 / scale);\n }\n\n // artists as stars; labels appear once zoomed in enough\n ctx.textAlign = \"center\";\n ctx.textBaseline = \"middle\";\n for (const node of nodes) {\n const color = PALETTE[node.gi % PALETTE.length];\n const glow = 1 + 0.6 * node.pick.match;\n ctx.beginPath();\n ctx.arc(node.x, node.y, node.r * glow, 0, Math.PI * 2);\n ctx.fillStyle = color;\n ctx.fill();\n if (scale > 1.15) {\n ctx.fillStyle = \"rgba(226,232,240,0.92)\";\n ctx.font = `${11 / scale}px sans-serif`;\n ctx.fillText(node.pick.name, node.x, node.y - node.r - (8 / scale));\n }\n }\n };\n\n // fit the whole constellation on mount and on data change\n useEffect(() => {\n const wrap = wrapRef.current;\n if (!wrap) return;\n const W = wrap.clientWidth;\n const H = height;\n cam.current.scale = Math.max(MIN_SCALE, Math.min((Math.min(W, H) / 2 - 60) / GENRE_RING, 1.2));\n cam.current.vx = 0;\n cam.current.vy = 0;\n draw();\n }, [nodes, height]);\n\n useEffect(() => {\n window.addEventListener(\"resize\", draw);\n return () => window.removeEventListener(\"resize\", draw);\n }, []);\n\n const screenToWorld = (px: number, py: number) => {\n const wrap = wrapRef.current;\n if (!wrap) return { x: 0, y: 0 };\n const { scale, vx, vy } = cam.current;\n return {\n x: vx + (px - wrap.clientWidth / 2) / scale,\n y: vy + (py - height / 2) / scale,\n };\n };\n\n const hit = (px: number, py: number) => {\n const w = screenToWorld(px, py);\n let best: { dist: number; node: typeof nodes[number] } | null = null;\n for (const node of nodes) {\n const d = Math.hypot(node.x - w.x, node.y - w.y);\n const hitR = node.r + 6 / cam.current.scale;\n if (d <= hitR && (!best || d < best.dist)) best = { dist: d, node };\n }\n return best?.node ?? null;\n };\n\n const onPointerDown = (e: React.PointerEvent) => {\n canvasRef.current?.setPointerCapture(e.pointerId);\n drag.current = { x: e.clientX, y: e.clientY, moved: false };\n };\n const onPointerMove = (e: React.PointerEvent) => {\n const canvas = canvasRef.current;\n if (!canvas) return;\n const rect = canvas.getBoundingClientRect();\n const px = e.clientX - rect.left;\n const py = e.clientY - rect.top;\n if (drag.current) {\n const dx = e.clientX - drag.current.x;\n const dy = e.clientY - drag.current.y;\n if (Math.abs(dx) + Math.abs(dy) > 3) drag.current.moved = true;\n cam.current.vx -= dx / cam.current.scale;\n cam.current.vy -= dy / cam.current.scale;\n drag.current.x = e.clientX;\n drag.current.y = e.clientY;\n draw();\n return;\n }\n const node = hit(px, py);\n setHover(node ? { x: px, y: py, name: node.pick.name } : null);\n if (node) canvas.style.cursor = \"pointer\";\n else canvas.style.cursor = \"grab\";\n };\n const onPointerUp = (e: React.PointerEvent) => {\n const canvas = canvasRef.current;\n if (!canvas) return;\n if (drag.current && !drag.current.moved) {\n const rect = canvas.getBoundingClientRect();\n const node = hit(e.clientX - rect.left, e.clientY - rect.top);\n setSelected(node ? node.pick : null);\n }\n drag.current = null;\n canvas.releasePointerCapture(e.pointerId);\n };\n const onWheel = (e: React.WheelEvent) => {\n e.preventDefault();\n const canvas = canvasRef.current;\n if (!canvas) return;\n const rect = canvas.getBoundingClientRect();\n const px = e.clientX - rect.left;\n const py = e.clientY - rect.top;\n const factor = Math.exp(-e.deltaY * 0.0012);\n const next = Math.max(MIN_SCALE, Math.min(MAX_SCALE, cam.current.scale * factor));\n const g = next / cam.current.scale;\n const w = screenToWorld(px, py);\n cam.current.scale = next;\n cam.current.vx = w.x - (px - canvas.clientWidth / 2) / next;\n cam.current.vy = w.y - (py - height / 2) / next;\n draw();\n };\n\n const resetView = () => {\n cam.current.scale = Math.max(MIN_SCALE, Math.min((Math.min(wrapRef.current?.clientWidth ?? 800, height) / 2 - 60) / GENRE_RING, 1.2));\n cam.current.vx = 0;\n cam.current.vy = 0;\n draw();\n };\n\n const img = selected?.images?.[0]?.url;\n\n return (\n

\n \n \n \n reset view\n \n {hover && (\n \n {hover.name}\n

\n )}\n \n\n {selected && (\n

\n {img && $\"\"$ }\n

{selected.name}

\n {Math.round(selected.match * 100)}% match · Popularity {selected.popularity}\n

\n \n ♪ {t.name}\n \n

\n \n

\n )}\n \n );\n}\n","/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useEffect, useMemo, useRef, useState } from \"https://esm.sh/react@18.2.0\";\nimport { RadarChart } from \"./RadarChart.tsx\";\n\ninterface Axis {\n label: string;\n value: number;\n}\n\ninterface TrackInfo {\n name: string;\n uri: string;\n previewUrl: string | null;\n}\n\ninterface Pick {\n id: string;\n name: string;\n images: { url: string }[];\n popularity: number;\n genres: string[];\n previewUrl: string | null;\n match: number;\n radar: Axis[];\n tracks: TrackInfo[];\n}\n\nconst PALETTE = [\n \"#60a5fa\", \"#34d399\", \"#f472b6\", \"#fbbf24\",\n \"#a78bfa\", \"#f87171\", \"#22d3ee\", \"#fb923c\",\n];\n\nconst GENRE_RING = 430; // world radius where genre labels live\nconst MIN_SCALE = 0.12;\nconst MAX_SCALE = 6;\n\nfunction trackUrl(uri: string): string {\n const id = uri.split(\":\")[2] ?? uri;\n return `https://open.spotify.com/track/${id}`;\n}\n\nexport function ConstellationView({\n profile,\n picks,\n height = 580,\n}: {\n profile: Axis[];\n picks: Pick[];\n height?: number;\n}) {\n const wrapRef = useRef(null);\n const canvasRef = useRef(null);\n const cam = useRef({ scale: 1, vx: 0, vy: 0 });\n const drag = useRef<{ x: number; y: number; moved: boolean } | null>(null);\n const [hover, setHover] = useState<{ x: number; y: number; name: string } | null>(null);\n const [selected, setSelected] = useState(null);\n\n // Emergent layout: each artist sits at the vector-sum of its genres'\n // directions, so artists who share genres cluster together — proximity in the\n // sky actually means similarity in sound (not a re-painted radar).\n const nodes = useMemo(() => {\n const n = Math.max(1, profile.length);\n const dirs = profile.map((_, gi) => {\n const an = (gi / n) * Math.PI * 2 - Math.PI / 2;\n return { x: Math.cos(an), y: Math.sin(an) };\n });\n const placed = picks.map((pick) => {\n let x = 0, y = 0, count = 0, domGi = 0, domVal = -1;\n for (const g of pick.genres ?? []) {\n const gi = profile.findIndex((a) => a.label === g);\n if (gi < 0) continue;\n x += dirs[gi].x;\n y += dirs[gi].y;\n count++;\n if (profile[gi].value > domVal) { domVal = profile[gi].value; domGi = gi; }\n }\n if (count === 0) {\n const best = pick.radar.reduce((m, a, j) => (a.value > m.val ? { j, val: a.value } : m), { j: -1, val: 0 });\n domGi = best.j >= 0 ? best.j : 0;\n x = dirs[domGi].x;\n y = dirs[domGi].y;\n count = 1;\n }\n return { x, y, domGi, pick };\n });\n const SCALE = 84;\n return placed.map((p) => ({\n x: p.x * SCALE + ((p.pick.id.charCodeAt(0) % 21) - 10),\n y: p.y * SCALE + ((p.pick.id.charCodeAt(1) % 21) - 10),\n r: 4 + (p.pick.popularity ?? 0) / 100 * 8,\n gi: p.domGi,\n pick: p.pick,\n }));\n }, [picks, profile]);\n\n const draw = () => {\n const canvas = canvasRef.current;\n const wrap = wrapRef.current;\n if (!canvas || !wrap) return;\n const dpr = window.devicePixelRatio || 1;\n const W = wrap.clientWidth;\n const H = height;\n if (canvas.width !== Math.round(W * dpr) || canvas.height !== Math.round(H * dpr)) {\n canvas.width = Math.round(W * dpr);\n canvas.height = Math.round(H * dpr);\n }\n const ctx = canvas.getContext(\"2d\");\n if (!ctx) return;\n\n const { scale, vx, vy } = cam.current;\n ctx.setTransform(dpr, 0, 0, dpr, 0, 0);\n // background\n ctx.fillStyle = \"#0b0f14\";\n ctx.fillRect(0, 0, W, H);\n\n const cx = W / 2;\n const cy = H / 2;\n ctx.translate(cx, cy);\n ctx.scale(scale, scale);\n ctx.translate(-vx, -vy);\n\n // soft glow around the center\n const grad = ctx.createRadialGradient(0, 0, 0, 0, 0, 120 / scale);\n grad.addColorStop(0, \"rgba(52,211,153,0.12)\");\n grad.addColorStop(1, \"rgba(52,211,153,0)\");\n ctx.fillStyle = grad;\n ctx.fillRect(-200 / scale, -200 / scale, 400 / scale, 400 / scale);\n\n // edges from you to each artist\n ctx.lineWidth = 1 / scale;\n for (const node of nodes) {\n ctx.beginPath();\n ctx.moveTo(0, 0);\n ctx.lineTo(node.x, node.y);\n ctx.strokeStyle = `hsla(${(node.gi / Math.max(1, profile.length)) * 360}, 80%, 60%, 0.12)`;\n ctx.stroke();\n }\n\n // genre rays + labels (fade out when zoomed way out or way in)\n const labelAlpha = Math.max(0, 1 - Math.abs(Math.log2(scale)) / 2.5);\n const n = Math.max(1, profile.length);\n profile.forEach((a, gi) => {\n const angle = (gi / n) * Math.PI * 2 - Math.PI / 2;\n const hx = Math.cos(angle) * GENRE_RING;\n const hy = Math.sin(angle) * GENRE_RING;\n ctx.beginPath();\n ctx.moveTo(0, 0);\n ctx.lineTo(hx, hy);\n ctx.strokeStyle = `hsla(${(gi / n) * 360}, 60%, 55%, ${0.10 * labelAlpha})`;\n ctx.lineWidth = 1 / scale;\n ctx.stroke();\n if (labelAlpha > 0.05) {\n ctx.globalAlpha = labelAlpha;\n ctx.fillStyle = `hsla(${(gi / n) * 360}, 60%, 72%, 1)`;\n ctx.font = `${13 / scale}px sans-serif`;\n ctx.textAlign = \"center\";\n ctx.textBaseline = \"middle\";\n ctx.fillText(a.label, hx * 1.12, hy * 1.12);\n ctx.globalAlpha = 1;\n }\n });\n\n // \"you\" at the center\n ctx.beginPath();\n ctx.arc(0, 0, 22, 0, Math.PI * 2);\n ctx.fillStyle = \"#34d399\";\n ctx.fill();\n ctx.strokeStyle = \"rgba(52,211,153,0.5)\";\n ctx.lineWidth = 3 / scale;\n ctx.stroke();\n if (scale > 1.2) {\n ctx.fillStyle = \"#a7f3d0\";\n ctx.font = `${12 / scale}px sans-serif`;\n ctx.textAlign = \"center\";\n ctx.textBaseline = \"bottom\";\n ctx.fillText(\"you\", 0, -26 / scale);\n }\n\n // artists as stars; labels appear once zoomed in enough\n ctx.textAlign = \"center\";\n ctx.textBaseline = \"middle\";\n for (const node of nodes) {\n const color = PALETTE[node.gi % PALETTE.length];\n const glow = 1 + 0.6 * node.pick.match;\n ctx.beginPath();\n ctx.arc(node.x, node.y, node.r * glow, 0, Math.PI * 2);\n ctx.fillStyle = color;\n ctx.fill();\n if (scale > 1.15) {\n ctx.fillStyle = \"rgba(226,232,240,0.92)\";\n ctx.font = `${11 / scale}px sans-serif`;\n ctx.fillText(node.pick.name, node.x, node.y - node.r - (8 / scale));\n }\n }\n };\n\n // fit the whole constellation on mount and on data change\n useEffect(() => {\n const wrap = wrapRef.current;\n if (!wrap) return;\n const W = wrap.clientWidth;\n const H = height;\n cam.current.scale = Math.max(MIN_SCALE, Math.min((Math.min(W, H) / 2 - 60) / GENRE_RING, 1.2));\n cam.current.vx = 0;\n cam.current.vy = 0;\n draw();\n }, [nodes, height]);\n\n useEffect(() => {\n window.addEventListener(\"resize\", draw);\n return () => window.removeEventListener(\"resize\", draw);\n }, []);\n\n const screenToWorld = (px: number, py: number) => {\n const wrap = wrapRef.current;\n if (!wrap) return { x: 0, y: 0 };\n const { scale, vx, vy } = cam.current;\n return {\n x: vx + (px - wrap.clientWidth / 2) / scale,\n y: vy + (py - height / 2) / scale,\n };\n };\n\n const hit = (px: number, py: number) => {\n const w = screenToWorld(px, py);\n let best: { dist: number; node: typeof nodes[number] } | null = null;\n for (const node of nodes) {\n const d = Math.hypot(node.x - w.x, node.y - w.y);\n const hitR = node.r + 6 / cam.current.scale;\n if (d <= hitR && (!best || d < best.dist)) best = { dist: d, node };\n }\n return best?.node ?? null;\n };\n\n const onPointerDown = (e: React.PointerEvent) => {\n canvasRef.current?.setPointerCapture(e.pointerId);\n drag.current = { x: e.clientX, y: e.clientY, moved: false };\n };\n const onPointerMove = (e: React.PointerEvent) => {\n const canvas = canvasRef.current;\n if (!canvas) return;\n const rect = canvas.getBoundingClientRect();\n const px = e.clientX - rect.left;\n const py = e.clientY - rect.top;\n if (drag.current) {\n const dx = e.clientX - drag.current.x;\n const dy = e.clientY - drag.current.y;\n if (Math.abs(dx) + Math.abs(dy) > 3) drag.current.moved = true;\n cam.current.vx -= dx / cam.current.scale;\n cam.current.vy -= dy / cam.current.scale;\n drag.current.x = e.clientX;\n drag.current.y = e.clientY;\n draw();\n return;\n }\n const node = hit(px, py);\n setHover(node ? { x: px, y: py, name: node.pick.name } : null);\n if (node) canvas.style.cursor = \"pointer\";\n else canvas.style.cursor = \"grab\";\n };\n const onPointerUp = (e: React.PointerEvent) => {\n const canvas = canvasRef.current;\n if (!canvas) return;\n if (drag.current && !drag.current.moved) {\n const rect = canvas.getBoundingClientRect();\n const node = hit(e.clientX - rect.left, e.clientY - rect.top);\n setSelected(node ? node.pick : null);\n }\n drag.current = null;\n canvas.releasePointerCapture(e.pointerId);\n };\n const onWheel = (e: React.WheelEvent) => {\n e.preventDefault();\n const canvas = canvasRef.current;\n if (!canvas) return;\n const rect = canvas.getBoundingClientRect();\n const px = e.clientX - rect.left;\n const py = e.clientY - rect.top;\n const factor = Math.exp(-e.deltaY * 0.0012);\n const next = Math.max(MIN_SCALE, Math.min(MAX_SCALE, cam.current.scale * factor));\n const g = next / cam.current.scale;\n const w = screenToWorld(px, py);\n cam.current.scale = next;\n cam.current.vx = w.x - (px - canvas.clientWidth / 2) / next;\n cam.current.vy = w.y - (py - height / 2) / next;\n draw();\n };\n\n const resetView = () => {\n cam.current.scale = Math.max(MIN_SCALE, Math.min((Math.min(wrapRef.current?.clientWidth ?? 800, height) / 2 - 60) / GENRE_RING, 1.2));\n cam.current.vx = 0;\n cam.current.vy = 0;\n draw();\n };\n\n const img = selected?.images?.[0]?.url;\n\n return (\n

\n \n \n \n reset view\n \n {hover && (\n \n {hover.name}\n

\n )}\n \n\n {selected && (\n

\n {img && $\"\"$ }\n

{selected.name}

\n {Math.round(selected.match * 100)}% match · Popularity {selected.popularity}\n

\n \n ♪ {t.name}\n \n

\n \n

\n )}\n \n );\n}\n","createdAt",["D",1787421033435],"branchVersion","branchId","dc1f9fe4-aa8c-400d-87f3-9d22e6847153","id","f8c773d7-7a4a-4d5b-84e7-ccf2b3929d80","discovery-radar",["D",1787417498284],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Spotify discovery with taste radar + weekly playlist refresh","imageUrl","e6d51557-2988-4ce3-bf61-63d827903a6c","pinnedFileId","01a02a62-92f6-771d-907a-be2483e744c9","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","3ebf4d50-fe40-465b-915c-bd543c8a8608","tursoName","f8c773d77a4a4d5b84e7ccf2b3929d80","tursoHostname","f8c773d77a4a4d5b84e7ccf2b3929d80-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789502486629],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_107":106,"_114":110},"org",{"_107":106,"_108":-5,"_109":110,"_19":62,"_111":112,"_113":31},"branch",{"_13":96,"_38":97,"_50":49,"_98":51,"_99":-5,"_100":-5,"_101":-5,"_102":-5,"_103":-5,"_104":52,"_105":106},"isOwned",90,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","test_account_001","handle","displayName","avatar","https://img.clerk.com/eyJ0eXBlIjoiZGVmYXVsdCIsImlpZCI6Imluc18yTm10cGhQUklwU0tqZHNiOHNnNGd2ZjJURFUiLCJyaWQiOiJ1c2VyXzJabHpKOGNWSmhqcWduM3VVV0xTUGlicVprayJ9","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_50":51,"_38":52,"_45":324,"_54":-5,"_55":31,"_56":57,"_58":57,"_59":60,"_61":-5,"_19":62,"_63":64,"_65":66,"_67":-5,"_68":-5,"_69":70,"_71":72,"_73":74,"_75":76,"_77":325,"_79":-5,"_80":81,"_82":81,"_83":84,"_85":84,"_86":84,"_87":81,"_88":81,"_89":326,"_91":327,"_93":328,"_95":31},"tree",[198,200,209,213,214,215],"files",[198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215],"counts",{"_187":70,"_188":165,"_189":70,"_190":191,"_192":193},"contents",[137,138,139,140,141,142],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_50":181,"_38":182,"_36":183,"_145":-5,"_48":49,"_47":184,"_147":66,"_45":185,"_13":70,"_40":174,"_42":-5,"_30":31,"_152":-5,"_33":186},{"_50":176,"_38":177,"_36":178,"_145":-5,"_48":49,"_47":165,"_147":66,"_45":179,"_13":70,"_40":174,"_42":-5,"_30":31,"_152":-5,"_33":180},{"_50":169,"_38":170,"_36":171,"_145":-5,"_48":49,"_47":172,"_147":66,"_45":173,"_13":70,"_40":174,"_42":-5,"_30":31,"_152":-5,"_33":175},{"_50":162,"_38":163,"_36":164,"_145":-5,"_48":49,"_47":165,"_147":66,"_45":166,"_13":70,"_40":26,"_42":167,"_30":31,"_152":-5,"_33":168},{"_50":154,"_38":155,"_36":156,"_145":-5,"_48":49,"_47":157,"_147":31,"_45":158,"_13":159,"_40":26,"_42":160,"_30":31,"_152":-5,"_33":161},{"_50":143,"_38":144,"_36":64,"_145":-5,"_48":49,"_47":146,"_147":31,"_45":148,"_13":149,"_40":150,"_42":151,"_30":31,"_152":52,"_33":153},"942e4d43-8e70-45ae-934e-3e687a248e5b","index.ts","parentId",52,"latest",["D",1787420592794],9,"http","import { serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Context, Hono } from \"npm:hono\";\nimport { getCookie, setCookie } from \"npm:hono/cookie\";\nimport { Root } from \"./frontend/root.tsx\";\nimport { StoredUser, getUser, init, upsertUser } from \"./lib/db.ts\";\nimport { authorizeUrl, exchangeCode } from \"./lib/spotify.ts\";\nimport { computeProfile, discover, updateDiscoveryPlaylist } from \"./lib/taste.ts\";\n\nawait init();\n\nconst app = new Hono();\nconst COOKIE = \"discovery_radar_user\";\n\nasync function getSessionUser(c: Context): Promise {\n const id = getCookie(c, COOKIE);\n return id ? getUser(id) : null;\n}\n\n// Serve the (never-cached) HTML shell at the root\napp.get(\"/\", (c) => c.html(Root()));\n\n// Serve frontend files, cached immutably\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\n\n// ---- Spotify OAuth ----\napp.get(\"/auth/login\", (c) => {\n const state = crypto.randomUUID();\n setCookie(c, \"discovery_radar_state\", state, { path: \"/\", httpOnly: true, sameSite: \"Lax\" });\n return c.redirect(authorizeUrl(state));\n});\n\napp.get(\"/auth/callback\", async (c) => {\n const code = c.req.query(\"code\");\n if (!code) return c.text(\"Missing authorization code\", 400);\n try {\n const tokens = await exchangeCode(code);\n const me = await (await fetch(\"https://api.spotify.com/v1/me\", {\n headers: { authorization: `Bearer ${tokens.access_token}` },\n })).json();\n await upsertUser({\n spotifyId: me.id,\n displayName: me.display_name ?? \"Spotify user\",\n accessToken: tokens.access_token,\n refreshToken: tokens.refresh_token ?? \"\",\n expiresAt: Date.now() + tokens.expires_in * 1000,\n });\n setCookie(c, COOKIE, me.id, {\n path: \"/\",\n httpOnly: true,\n sameSite: \"Lax\",\n maxAge: 60 * 60 * 24 * 30,\n });\n return c.redirect(\"/\");\n } catch (e) {\n console.error(\"callback failed\", e);\n return c.text(\"Spotify auth failed: \" + (e as Error).message, 500);\n }\n});\n\napp.post(\"/auth/logout\", (c) => {\n setCookie(c, COOKIE, \"\", { path: \"/\", httpOnly: true, sameSite: \"Lax\", maxAge: 0 });\n return c.redirect(\"/\");\n});\n\n// ---- API ----\napp.get(\"/api/me\", async (c) => {\n const u = await getSessionUser(c);\n return c.json(u ? { connected: true, displayName: u.displayName } : { connected: false });\n});\n\napp.get(\"/api/profile\", async (c) => {\n const u = await getSessionUser(c);\n if (!u) return c.json({ error: \"unauthorized\" }, 401);\n return c.json({ profile: await computeProfile(u) });\n});\n\napp.get(\"/api/discover\", async (c) => {\n const u = await getSessionUser(c);\n if (!u) return c.json({ error: \"unauthorized\" }, 401);\n const profile = await computeProfile(u);\n const obscurity = parseFloat(c.req.query(\"obscurity\") ?? \"\");\n const genre = c.req.query(\"genre\");\n const picks = await discover(u, profile, {\n obscurity: Number.isFinite(obscurity) ? obscurity : undefined,\n genres: genre ? [genre] : undefined,\n });\n return c.json({ profile, genres: profile.map((a) => a.label), picks });\n});\n\napp.post(\"/api/save\", async (c) => {\n const u = await getSessionUser(c);\n if (!u) return c.json({ error: \"unauthorized\" }, 401);\n try {\n const body = await c.req.json<{ trackUris: string[] }>();\n const playlistId = await updateDiscoveryPlaylist(u, body.trackUris ?? []);\n return c.json({ ok: true, playlistId });\n } catch (e) {\n const msg = (e as Error).message || \"save failed\";\n console.error(\"save failed:\", e);\n return c.json(\n { ok: false, error: \"Spotify blocked playlist access: \" + msg },\n 502,\n );\n }\n});\n\n// Unwrap and rethrow Hono errors as the original error\napp.onError((err) => Promise.reject(err));\n\nexport default app.fetch;\n","label",[144],"3f3b0743-c3c9-408e-bb21-1acefa75e8a1","README.md","01a02a62-92f6-771d-907a-b81da57860c2",39,["D",1787419507333],4,"# 🎧 Discovery Radar\n\nA personal Spotify discovery app that breaks you out of the same 50 artists.\n\nIt computes **your sound profile** (a radar chart of the genres that dominate\nyour library), then digs deep into those genres to surface **under-discovered**\nacts — showing how closely each one's genres line up with yours, with a\n30-second preview so you can audition in the browser. Save your picks to a\nSpotify playlist, or let the weekly cron refresh it so it never goes stale.\n\n## How it works\n\n```mermaid\ngraph LR\n Browser -->|\"Connect Spotify\"| Hono[\"index.ts
(Hono + OAuth)\"]\n Hono -->|stores tokens| DB[(SQLite)]\n Hono -->|computeProfile + discover| SP[\"Spotify API\"]\n SP -->|top artists + genre search| Hono\n Hono -->|radar data + picks| React[\"React app
(radar charts)\"]\n Cron[\"cron/refresh.ts
(weekly)\"] -->|refresh playlist| SP\n```\n\n- `index.ts` — Hono server: Spotify OAuth, session cookie, `/api/me`,\n `/api/profile`, `/api/discover`, `/api/save`.\n- `lib/spotify.ts` — OAuth (authorization-code flow) + authed API client with\n token refresh.\n- `lib/taste.ts` — taste profile, related-artist discovery, playlist writer.\n- `lib/db.ts` — SQLite storage for per-user Spotify tokens.\n- `frontend/` — React app with an SVG radar-chart component\n (`RadarChart.tsx`) that overlays each candidate's sound on yours.\n- `cron/refresh.ts` — weekly job that refreshes each user's \"Discovery Radar\"\n playlist (Sundays 12:00 UTC).\n\n## Setup\n\n1. Create a Spotify app at\n (Dashboard → Create app).\n2. Add this as a **Redirect URI** in the app's settings:\n `https://discovery-radar.val.run/auth/callback`\n3. Set the two env vars below.\n\n👉 Add SPOTIFY_CLIENT_ID here: https://www.val.town/x/test_account_001/discovery-radar/environment-variables?key=SPOTIFY_CLIENT_ID\n\n👉 Add SPOTIFY_CLIENT_SECRET here: https://www.val.town/x/test_account_001/discovery-radar/environment-variables?key=SPOTIFY_CLIENT_SECRET\n\n`SPOTIFY_REDIRECT_URI` is optional — it defaults to the callback URL above.\n\n4. Open the app, hit **Connect Spotify**, and authorize. Your taste profile and\n a grid of under-discovered artists appear. Hit **Save top picks** to write\n them to a private \"Discovery Radar\" playlist.\n\n## Notes\n\n- **Discovery uses only `/me/top` + `/v1/search`.** Spotify currently 403/404s\n the richer endpoints (related-artists, audio-features, browse, and even the\n recommendations engine) for new/unreviewed apps. So the radar is built from\n genre tags, and discovery is genre-search paged deep enough to reach small\n acts. This is by design and resilient, not a limitation you need to fix.\n- The under-discovered filter keeps artists with popularity between ~5 and 45.\n- The weekly cron refreshes the playlist for every connected user.\n- **Save-to-playlist needs the `playlist-modify-*` scopes on the user's token.**\n If \"Save\" errors with \"Spotify blocked playlist access\", the granted token is\n missing those scopes — disconnect and click Connect Spotify again to re-consent.\n- Tokens are stored per Spotify user in the val's SQLite DB and refreshed\n automatically.\n",[155],"4fe8db74-919d-4686-9be5-883aad74c74f","CHANGELOG.md","01a02a62-92f6-771d-907a-b61ebd4f10fe",1,["D",1787417498284],"# Changelog\n\n## 2026-07-30 — Immutable asset caching\n\nFrontend files are now served at version-addressed URLs\n(`/__immutable/45/frontend/index.tsx`) with\n`Cache-Control: public, max-age=31536000, immutable`, so repeat visits load the\nwhole client graph from the browser cache — roughly 3× faster (~665ms → ~157ms\nmeasured). Publishing your val bumps its version, which changes every URL, so\ncaches invalidate automatically. Old-version URLs return 404 after a publish\n(like Next.js build assets); a reload picks up the new version.\n\nWhat changed in the template:\n\n- `frontend/index.html` → [`frontend/root.tsx`](/frontend/root.tsx): the HTML\n shell is now JSX and stamps asset URLs with `immutableFileUrl()`\n- [`index.ts`](/index.ts): serves `Root()` at `/`, and one\n `app.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path))` route\n serves all frontend files\n\n### Upgrading an existing remix\n\nYour copy of this template doesn't update automatically. Two options:\n\n**Minimal (most of the benefit):** point both routes at `serveImmutableFile` —\nyour existing bare URLs redirect into versioned space, the new route serves\nthem, and the whole module graph gets cached (costs one redirect per page view):\n\n```ts\nimport { serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\n\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/frontend/**/*\", (c) => serveImmutableFile(c.req.path)); // was serveFile\n```\n\n**Full upgrade (also removes the redirect):** three self-contained steps —\nno other files needed. Adjust the ``, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter\n

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