lgtm-flash

1import { atom, read, update } from 'claude-code'
2import type { EngineInterface, Register } from 'claude-code'
3
4import type { Flash } from '../types'
5import { shipSvg } from './ship-svg'
6
7const flash = atom({ plugin: 'lgtm-flash', key: 'flash' } as const, null as Flash)
8
9const CODE_CHANGE = /^(Edit|MultiEdit|Write|NotebookEdit)$/
10// The desktop scene (ship-svg.ts) ends on its close-up at 6.2s; the band closes right there.
11const SHOW_MS = 6200
12// What every voyage claims to have shipped; /ship 120 claims 120 instead.
13const SHIP_LINES = 40000
14
15type Change = {
16  file_path?: string
17  notebook_path?: string
18}
19
20let hide: { cancel: () => void } | undefined
21
22// Starts a voyage above the prompt, and takes the band back once it's over.
23const launch = async ($: EngineInterface, file: string, lines: number) => {
24  const at = await $.clock.now()
25  await update($, flash, () => ({ file, lines, at }))
26  hide?.cancel()
27  hide = $.clock.after(SHOW_MS, () => {
28    void update($, flash, f => (f !== null && f.at === at ? null : f))
29  })
30}
31
32export const register: Register = on => {
33  on('session.start', async ($, e, next) => {
34    const started = await next(e)
35    await $.command.register({
36      name: 'ship',
37      description: 'Ship it to PROD: launch the LGTM Lines ship',
38      argumentHint: '[lines]',
39    })
40    return started
41  })
42
43  // /ship launches the voyage on demand; /ship 120 claims 120 lines.
44  on('command.run', { command: 'ship' }, async ($, e) => {
45    const n = Number(e.args.trim())
46    const lines = e.args.trim() !== '' && Number.isFinite(n) && n >= 0 ? Math.round(n) : SHIP_LINES
47    await launch($, '', lines)
48    return { text: 'Looks good to me.' }
49  })
50
51  on('tool.call', { tool: CODE_CHANGE }, async ($, e, next) => {
52    const ran = await next(e)
53    if (ran.deny !== undefined || ran.isError === true) return ran
54
55    const input = e as Change
56    const path = input.file_path ?? input.notebook_path ?? ''
57    const file = path.split(/[\\/]/).pop() ?? ''
58    await launch($, file, SHIP_LINES)
59    return ran
60  })
61
62  on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
63    // Whatever else draws in the band (another mod's row, a status line) stays
64    // on screen under the ship while it plays.
65    const below = await next(e)
66    const f = await read($, flash)
67    if (e.props.hasSurvey || f === null) return below
68
69    const elements = $.ui.resolve(e)
70    const { Box } = elements
71
72    // The terminal gets the ship in text characters. Chosen by the surface, not
73    // by which elements the table lists: a table can carry an element its
74    // surface draws as nothing.
75    if (e.surface === 'terminal') {
76      if (!('Client' in elements)) return below
77      const { Client } = elements
78
79      // The full ship needs 18 rows; a shorter band gets it without the grey tier.
80      const tall = e.props.maxRows >= 18
81      // A new key per flash starts the voyage from the first frame.
82      return (
83        <Box flexDirection="column">
84          <Client
85            key={`lgtm-${f.at}`}
86            module="./fly.tsx"
87            props={{ file: f.file, lines: f.lines, tall }}
88            width="100%"
89            height={tall ? 18 : 14}
90          />
91          {below}
92        </Box>
93      )
94    }
95
96    // Every other surface draws real vector art: the animated SVG ship.
97    if (!('Svg' in elements)) return below
98    const { Svg } = elements
99    // Drawn as an image, which fills the band's width; an interactive frame is
100    // a fixed 150px tall and shrinks the scene to fit. The voyage stamp makes
101    // each flash a new document, so its animation starts from the first frame.
102    return (
103      <Box flexDirection="column">
104        <Svg
105          key={`lgtm-svg-${f.at}`}
106          source={shipSvg(f.lines).replace('<svg ', `<svg data-voyage="${f.at}" `)}
107          alt={`LGTM: the LGTM Lines container ship sails past, ${f.lines} lines shipped`}
108        />
109        {below}
110      </Box>
111    )
112  })
113}
114

1// The LGTM Lines ship as an animated SVG, for surfaces that draw Svg
2// (the desktop app). An eleven-second scene, shot like the video: in a wide
3// shot the ship sails in fast while the L, G, T and M containers slam onto
4// its moving deck (the camera shakes on each), the ship stops, the camera
5// zooms in on its bridge and containers, and the words Looks, Good, To and Me
6// appear above them in turn, each drawing a glowing line down to its own
7// letter. Animated with SMIL, which an interactive Svg runs.
8
9const W = 1000
10const H = 340
11const SEA = 318 // waterline
12const SCALE = 0.8 // the ship's drawing scale
13export const DUR = 6.2 // seconds: the scene ends on the close-up
14
15// The timeline, in seconds.
16const ARRIVE = 2.9 // the ship comes to a stop
17const DROPS = [0.85, 1.3, 1.75, 2.2] // L, G, T and M start falling, the ship still moving
18const FALL = 0.6 // each drop, bounce included
19const LAND = 0.36 // when, within a drop, the container hits the deck
20const ZOOM_IN = 2.9 // the camera pushes in on the bridge and containers
21const ZOOM_TIME = 0.6
22const WORDS = [3.55, 3.85, 4.15, 4.45] // when Looks, Good, To and Me appear
23
24const X0 = 215 // where the ship stops: centred
25// The close-up frame, in stage units: the bridge, the containers and the
26// words above them, cropped like the video's shot.
27const VIEW = { x: X0 - 10, y: 32, w: 660 }
28const ZOOM = W / VIEW.w
29
30const commas = (n: number) => String(n).replace(/\B(?=(\d{3})+(?!\d))/g, ',')
31const s = (t: number) => `${t.toFixed(2)}s`
32
33// Deterministic scatter, so every voyage has the same sky.
34const rand = (i: number) => {
35  const x = Math.sin(i * 12.9898 + 78.233) * 43758.5453
36  return x - Math.floor(x)
37}
38
39// The stage reaches PAD past each side of the action, so on a band wider than
40// the scene's shape the sky and sea still run edge to edge.
41const PAD = 260
42
43const stars = () =>
44  Array.from({ length: 120 }, (_, i) => {
45    const x = Math.round(-PAD + rand(i) * (W + 2 * PAD))
46    const y = Math.round(34 + rand(i + 100) * (SEA - 50))
47    const r = (0.6 + rand(i + 200) * 1.1).toFixed(1)
48    const twinkle =
49      i % 3 === 0
50        ? `<animate attributeName="opacity" values="0.9;0.2;0.9" dur="${(1.5 + rand(i + 300) * 2).toFixed(1)}s" repeatCount="indefinite"/>`
51        : ''
52    return `<circle cx="${x}" cy="${y}" r="${r}" fill="#c9d3dc" opacity="0.7">${twinkle}</circle>`
53  }).join('')
54
55const windows = () => {
56  const golds = ['#f2b705', '#c99a2e', '#8a6d2a', '#262c33']
57  let out = ''
58  for (let row = 0; row < 4; row++) {
59    for (let col = 0; col < 5; col++) {
60      const i = row * 5 + col
61      const fill = golds[Math.floor(rand(i + 400) * golds.length)]
62      const flicker =
63        i % 4 === 1
64          ? `<animate attributeName="fill" values="${fill};#262c33;${fill}" dur="${(1 + rand(i) * 2).toFixed(1)}s" repeatCount="indefinite" calcMode="discrete"/>`
65          : ''
66      out += `<rect x="${44 + col * 19}" y="${-186 + row * 27}" width="12" height="12" fill="${fill}">${flicker}</rect>`
67    }
68  }
69  return out
70}
71
72// The four LGTM containers. Each waits high above the deck, then drops on
73// its cue with a bounce and a puff of dust; once aboard it flashes dark
74// green, its slab-serif letter glowing.
75const lgtmTier = () =>
76  ['L', 'G', 'T', 'M']
77    .map((letter, i) => {
78      const x = 182 + i * 128
79      const start = DROPS[i] ?? 0
80      const ribs = Array.from({ length: 19 }, (_, k) => {
81        const rx = x + 6 + k * 6.3
82        return `<line x1="${rx.toFixed(1)}" y1="-201" x2="${rx.toFixed(1)}" y2="-141" stroke="#0f6b33" stroke-width="1" opacity="0.55"/>`
83      }).join('')
84      const container = `
85        <rect x="${x}" y="-206" width="122" height="70" fill="#0b5d2a">
86          <animate attributeName="fill" values="#0b5d2a;#04331a" dur="0.4s" repeatCount="indefinite" calcMode="discrete"/>
87        </rect>
88        ${ribs}
89        <rect x="${x}" y="-206" width="122" height="70" fill="none" stroke="#2ef07a" stroke-width="2.5" filter="url(#glow)"/>
90        <text x="${x + 61}" y="-153" text-anchor="middle" font-family="Rockwell, 'Roboto Slab', 'Courier New', Georgia, serif" font-weight="900" font-size="58" fill="#5dff9d" filter="url(#glow)">${letter}</text>`
91      const landAt = start + FALL * LAND
92      const puff = (cx: number, dir: number) => `
93        <ellipse cx="${cx}" cy="-138" rx="2" ry="4" fill="#9aa8b6" opacity="0">
94          <animate attributeName="opacity" values="0;0.7;0" begin="${s(landAt)}" dur="0.5s" fill="freeze"/>
95          <animate attributeName="rx" values="2;20" begin="${s(landAt)}" dur="0.5s" fill="freeze"/>
96          <animate attributeName="cx" values="${cx};${cx + dir * 22}" begin="${s(landAt)}" dur="0.5s" fill="freeze"/>
97        </ellipse>`
98      return `
99      <g transform="translate(0 -900)">
100        <animateTransform attributeName="transform" type="translate" values="0 -520; 0 8; 0 -14; 0 0" keyTimes="0;${LAND};0.7;1" calcMode="spline" keySplines="0.55 0 1 0.45; 0 0.5 0.5 1; 0.5 0 1 0.5" begin="${s(start)}" dur="${s(FALL)}" fill="freeze"/>
101        ${container}
102      </g>
103      ${puff(x + 4, -1)}${puff(x + 118, 1)}`
104    })
105    .join('')
106
107const lowerTier = () =>
108  Array.from({ length: 9 }, (_, i) => {
109    const x = 176 + i * 57.5
110    const ribs = Array.from({ length: 6 }, (_, k) => {
111      const rx = x + 8 + k * 8
112      return `<line x1="${rx}" y1="-129" x2="${rx}" y2="-87" stroke="#2a323b" stroke-width="1"/>`
113    }).join('')
114    return `<rect x="${x}" y="-134" width="55" height="52" fill="#11161d" stroke="#4a545e" stroke-width="1.5"/>${ribs}`
115  }).join('')
116
117const rail = () =>
118  Array.from({ length: 44 }, (_, i) => `<rect x="${152 + i * 12.5}" y="-80" width="8" height="7" fill="none" stroke="#8a96a3" stroke-width="1"/>`).join('')
119
120const plating = () =>
121  [-58, -48, -38, -28, -18, -10].map(y => `<line x1="12" y1="${y}" x2="${660 + y * 0.4}" y2="${y}" stroke="#1f2a35" stroke-width="1"/>`).join('')
122
123// LOOKS GOOD TO ME: each word appears above its container, its first letter
124// green like the container's, and draws a glowing line down to it; the
125// container flashes as the line lands.
126const PHRASE = ['Looks', 'Good', 'To', 'Me']
127const phrase = () =>
128  PHRASE.map((word, i) => {
129    const t = WORDS[i] ?? 4
130    const box = 182 + i * 128
131    const cx = box + 61
132    const half = 82 // half the reveal window, wide enough for LOOKS
133    return `
134  <!-- the word: wide-tracked capitals, revealed left to right behind a glowing scan cursor -->
135  <clipPath id="wclip${i}"><rect x="${cx - half}" y="-330" width="0" height="56">
136    <animate attributeName="width" values="0;${half * 2}" calcMode="spline" keyTimes="0;1" keySplines="0.3 0 0.2 1" begin="${s(t)}" dur="0.3s" fill="freeze"/>
137  </rect></clipPath>
138  <g clip-path="url(#wclip${i})">
139    <text x="${cx + 3}" y="-290" text-anchor="middle" font-family="'Segoe UI Variable Display', 'Segoe UI', system-ui, sans-serif" font-weight="600" font-size="26" letter-spacing="4" fill="url(#wordgrad)" filter="url(#wordglow)"><tspan fill="#2ef07a" font-weight="800">${word[0]!.toUpperCase()}</tspan>${word.slice(1).toUpperCase()}</text>
140  </g>
141  <rect x="${cx - half}" y="-322" width="2.2" height="40" rx="1.1" fill="#bff7ff" opacity="0" filter="url(#glow)">
142    <animate attributeName="x" values="${cx - half};${cx + half}" calcMode="spline" keyTimes="0;1" keySplines="0.3 0 0.2 1" begin="${s(t)}" dur="0.3s" fill="freeze"/>
143    <animate attributeName="opacity" values="0;1;1;0" keyTimes="0;0.1;0.85;1" begin="${s(t)}" dur="0.34s" fill="freeze"/>
144  </rect>
145  <!-- the connector: a fine line drawing down, a spark running ahead of it -->
146  <rect x="${cx - 0.8}" y="-280" width="1.6" height="0" fill="#2ef07a" opacity="0.85" filter="url(#glow)">
147    <animate attributeName="height" values="0;68" calcMode="spline" keyTimes="0;1" keySplines="0.4 0 0.2 1" begin="${s(t + 0.24)}" dur="0.22s" fill="freeze"/>
148  </rect>
149  <circle cx="${cx}" cy="-280" r="2.6" fill="#eafff2" opacity="0" filter="url(#glow)">
150    <animate attributeName="cy" values="-280;-212" calcMode="spline" keyTimes="0;1" keySplines="0.4 0 0.2 1" begin="${s(t + 0.24)}" dur="0.22s" fill="freeze"/>
151    <animate attributeName="opacity" values="0;1" begin="${s(t + 0.24)}" dur="0.05s" fill="freeze"/>
152  </circle>
153  <rect x="${box}" y="-206" width="122" height="70" fill="#eafff2" opacity="0">
154    <animate attributeName="opacity" values="0;0.4;0" begin="${s(t + 0.46)}" dur="0.35s" fill="freeze"/>
155  </rect>`
156  }).join('')
157
158const ship = () => `
159  <!-- smoke drifting back from the funnel -->
160  ${[0, 1, 2].map(k => `<circle cx="78" cy="-266" r="6" fill="url(#smoke)" opacity="0">
161    <animate attributeName="cy" values="-266;-318" dur="2.4s" begin="${(k * 0.8).toFixed(1)}s" repeatCount="indefinite"/>
162    <animate attributeName="cx" values="78;24" dur="2.4s" begin="${(k * 0.8).toFixed(1)}s" repeatCount="indefinite"/>
163    <animate attributeName="r" values="6;17" dur="2.4s" begin="${(k * 0.8).toFixed(1)}s" repeatCount="indefinite"/>
164    <animate attributeName="opacity" values="0;0.7;0" dur="2.4s" begin="${(k * 0.8).toFixed(1)}s" repeatCount="indefinite"/>
165  </circle>`).join('')}
166
167  <!-- foam at the bow while under way -->
168  <g>
169    <animate attributeName="opacity" values="1;0" begin="${s(ARRIVE - 0.3)}" dur="0.6s" fill="freeze"/>
170    ${[0, 1, 2].map(k => `<ellipse cx="${652 - k * 14}" cy="${-3 + k * 1.5}" rx="${16 - k * 3}" ry="2.6" fill="#e8f4ff" opacity="0.5">
171      <animate attributeName="rx" values="${16 - k * 3};${22 - k * 3};${16 - k * 3}" dur="${0.5 + k * 0.15}s" repeatCount="indefinite"/>
172      <animate attributeName="opacity" values="0.55;0.2;0.55" dur="${0.5 + k * 0.15}s" repeatCount="indefinite"/>
173    </ellipse>`).join('')}
174  </g>
175
176  <!-- funnel and mast -->
177  <polygon points="56,-262 98,-262 106,-216 48,-216" fill="#e0a526" stroke="#e6edf3" stroke-width="2"/>
178  <rect x="54" y="-252" width="46" height="9" fill="#2ef07a"/>
179  <line x1="128" y1="-216" x2="128" y2="-270" stroke="#8a96a3" stroke-width="2"/>
180  <circle cx="128" cy="-272" r="4" fill="#ff4d4d">
181    <animate attributeName="opacity" values="1;0.15;1" dur="1s" repeatCount="indefinite"/>
182  </circle>
183
184  <!-- bridge -->
185  <rect x="14" y="-216" width="142" height="16" fill="#12171e" stroke="#e6edf3" stroke-width="2"/>
186  <rect x="30" y="-200" width="112" height="128" fill="#12171e" stroke="#e6edf3" stroke-width="2"/>
187  ${windows()}
188
189  <!-- containers: the grey tier, then the LGTM ones dropping on -->
190  ${lowerTier()}
191  ${lgtmTier()}
192  ${phrase()}
193
194  <!-- deck rail and hull with a raked bow -->
195  ${rail()}
196  <path d="M 4,-72 L 712,-72 Q 690,-28 640,0 L 12,0 Z" fill="#0f141a" stroke="#e6edf3" stroke-width="2.5"/>
197  ${plating()}
198  <text x="330" y="-38" text-anchor="middle" font-family="'Courier New', Consolas, monospace" font-size="15" letter-spacing="6" fill="#b8c4cf">LGTM LINES</text>
199
200  <!-- the glow reflected in the water, once the containers are aboard -->
201  <rect x="180" y="4" width="510" height="14" fill="url(#reflect)" opacity="0">
202    <animate attributeName="opacity" values="0;0.8" begin="${s((DROPS[3] ?? 4.4) + 0.4)}" dur="0.4s" fill="freeze"/>
203  </rect>`
204
205// Each landing pushes the ship down a touch.
206const landings = DROPS.map(t => s(t + FALL * LAND)).join(';')
207
208export const shipSvg = (lines: number) => `<svg xmlns="http://www.w3.org/2000/svg" viewBox="${-PAD} 0 ${W + 2 * PAD} ${H}" width="${(W + 2 * PAD) * 3}" height="${H * 3}" preserveAspectRatio="xMidYMid meet">
209  <defs>
210    <filter id="glow" x="-30%" y="-30%" width="160%" height="160%">
211      <feGaussianBlur stdDeviation="4" result="blur"/>
212      <feMerge><feMergeNode in="blur"/><feMergeNode in="blur"/><feMergeNode in="SourceGraphic"/></feMerge>
213    </filter>
214    <filter id="bigglow" x="-30%" y="-60%" width="160%" height="220%">
215      <feGaussianBlur stdDeviation="9" result="blur"/>
216      <feMerge><feMergeNode in="blur"/><feMergeNode in="blur"/><feMergeNode in="SourceGraphic"/></feMerge>
217    </filter>
218    <radialGradient id="smoke"><stop offset="0" stop-color="#c9d3dc" stop-opacity="0.55"/><stop offset="0.6" stop-color="#9aa8b6" stop-opacity="0.25"/><stop offset="1" stop-color="#9aa8b6" stop-opacity="0"/></radialGradient>
219    <linearGradient id="wordgrad" x1="0" y1="0" x2="1" y2="1"><stop offset="0" stop-color="#ffffff"/><stop offset="0.6" stop-color="#cfefff"/><stop offset="1" stop-color="#5ec4ff"/></linearGradient>
220    <filter id="wordglow" x="-20%" y="-60%" width="140%" height="220%"><feGaussianBlur in="SourceAlpha" stdDeviation="2.4" result="b"/><feFlood flood-color="#5ec4ff" flood-opacity="0.45"/><feComposite in2="b" operator="in" result="g"/><feMerge><feMergeNode in="g"/><feMergeNode in="SourceGraphic"/></feMerge></filter>
221    <filter id="softwhite" x="-10%" y="-40%" width="120%" height="180%">
222      <feGaussianBlur stdDeviation="3" result="blur"/>
223      <feColorMatrix in="blur" type="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 0.45 0" result="halo"/>
224      <feMerge><feMergeNode in="halo"/><feMergeNode in="SourceGraphic"/></feMerge>
225    </filter>
226    <linearGradient id="reflect" x1="0" y1="0" x2="0" y2="1">
227      <stop offset="0" stop-color="#2ef07a" stop-opacity="0.45"/>
228      <stop offset="1" stop-color="#2ef07a" stop-opacity="0"/>
229    </linearGradient>
230    <clipPath id="abovedeck"><rect x="0" y="-200" width="${W}" height="${SEA - 165 - -200}"/></clipPath>
231    <linearGradient id="sky" x1="0" y1="0" x2="0" y2="1">
232      <stop offset="0" stop-color="#0d1217"/>
233      <stop offset="1" stop-color="#161c23"/>
234    </linearGradient>
235  </defs>
236  <g>
237    <animate attributeName="opacity" values="0;1" dur="0.3s" fill="freeze"/>
238    <animate attributeName="opacity" values="1;0" begin="${s(DUR - 0.35)}" dur="0.35s" fill="freeze"/>
239
240  <rect x="${-PAD}" width="${W + 2 * PAD}" height="${H}" fill="url(#sky)"/>
241  ${stars()}
242
243  <!-- header strip, as in the video, spread over the full stage so its text can be large; it gives way to the close-up -->
244  <g>
245    <animate attributeName="opacity" values="1;0" begin="${s(ZOOM_IN)}" dur="0.4s" fill="freeze"/>
246  <text x="${-PAD + 24}" y="34" font-family="'Cascadia Mono', Consolas, 'Courier New', monospace" font-size="30" font-weight="700" letter-spacing="3" fill="#d9e1e8">L-G-T-M  ·  CHORUS 1  ·  SHIPPING</text>
247  <!-- the line count swells and shrinks, growing leftwards from its right-hand end -->
248  <g transform="translate(${W + PAD - 24} 34)"><g>
249    <animateTransform attributeName="transform" type="scale" values="1;1.12;1" keyTimes="0;0.5;1" calcMode="spline" keySplines="0.4 0 0.6 1;0.4 0 0.6 1" dur="0.9s" repeatCount="indefinite"/>
250  <text x="0" y="0" text-anchor="end" font-family="'Cascadia Mono', Consolas, 'Courier New', monospace" font-size="30" font-weight="700" letter-spacing="3" fill="#d9e1e8"><tspan fill="#3dff8a">+${commas(lines)} LINES</tspan> THAT I DIDN'T READ</text>
251  </g></g>
252  <line x1="${-PAD + 24}" y1="48" x2="${W + PAD - 24}" y2="48" stroke="#3a4654" stroke-width="1.5"/>
253  </g>
254
255  <!-- the camera: pushes in for the close-up, then pulls back out -->
256  <g>
257    <animateTransform attributeName="transform" type="scale" values="1; ${ZOOM.toFixed(4)}" calcMode="spline" keyTimes="0;1" keySplines="0.45 0 0.25 1" begin="${s(ZOOM_IN)}" dur="${s(ZOOM_TIME)}" fill="freeze"/>
258  <g>
259    <animateTransform attributeName="transform" type="translate" values="0 0; ${-VIEW.x} ${-VIEW.y}" calcMode="spline" keyTimes="0;1" keySplines="0.45 0 0.25 1" begin="${s(ZOOM_IN)}" dur="${s(ZOOM_TIME)}" fill="freeze"/>
260
261  <!-- the camera shakes as each container slams down -->
262  <g>
263    <animateTransform attributeName="transform" type="translate" values="0 0; -5 4; 4 -3; -3 2; 2 -1; 0 0" dur="0.3s" begin="${landings}"/>
264
265  <!-- the sea: dark water and drifting swell lines -->
266  <rect x="${-PAD * 2}" y="${SEA}" width="${W + 4 * PAD}" height="${H - SEA}" fill="#0a0f14"/>
267  ${[0, 1, 2].map(k => `<line x1="${-PAD * 2}" y1="${SEA + 8 + k * 9}" x2="${W + 2 * PAD}" y2="${SEA + 8 + k * 9}" stroke="#27405a" stroke-width="1.5" stroke-dasharray="${30 + k * 12} ${18 + k * 6}">
268    <animate attributeName="stroke-dashoffset" values="0;-${96 + k * 36}" dur="${2 + k}s" repeatCount="indefinite"/>
269  </line>`).join('')}
270
271  <!-- the ship sails in as its cargo lands, stops for its close-up, and sails off -->
272  <g>
273    <animateTransform attributeName="transform" type="translate" values="-620 0; ${X0} 0; ${X0} 0" keyTimes="0;${(ARRIVE / DUR).toFixed(3)};1" calcMode="spline" keySplines="0.15 0.7 0.35 1; 0 0 1 1" dur="${DUR}s" fill="freeze"/>
274    <g>
275      <animateTransform attributeName="transform" type="translate" values="0 0; 0 -2.5; 0 0" dur="1.8s" repeatCount="indefinite"/>
276      <g>
277        <animateTransform attributeName="transform" type="translate" values="0 0; 0 5; 0 0" dur="0.3s" begin="${landings}"/>
278        <g transform="translate(0 ${SEA}) scale(${SCALE})">
279          <!-- wake behind the stern -->
280          <path d="M -10,2 L -180,10" stroke="#a9c9de" stroke-width="2" opacity="0.6" stroke-dasharray="20 10">
281            <animate attributeName="stroke-dashoffset" values="0;60" dur="0.8s" repeatCount="indefinite"/>
282            <animate attributeName="opacity" values="0.6;0" begin="${s(ARRIVE - 0.3)}" dur="0.6s" fill="freeze"/>
283          </path>
284          ${ship()}
285        </g>
286      </g>
287    </g>
288  </g>
289
290  </g>
291
292  </g>
293  </g>
294
295  </g>
296</svg>`
297

1import type { ClientModule } from 'claude-code'
2
3// The LGTM Lines container ship from the "LGTM (Looks Good to Me)" video,
4// in line art: a gold funnel and a lit bridge at the stern, four green
5// LGTM containers flashing dark green on a tier of grey ones, a deep hull
6// with a raked bow, a radar ring behind, and the video's header strip.
7
8const FRAME_MS = 40
9const FRAMES = 150 // about 6 seconds
10const FLASH_FRAMES = 5 // the containers change shade every 200ms
11
12// Slab-serif block letters, 7 wide and 5 tall, like the video's.
13const GLYPHS: Record<string, string[]> = {
14  L: ['████   ', ' ██    ', ' ██    ', ' ██   █', '███████'],
15  G: [' ██████', '██     ', '██  ███', '██   ██', ' ██████'],
16  T: ['███████', '█ ███ █', '  ███  ', '  ███  ', ' █████ '],
17  M: ['██   ██', '███ ███', '██ █ ██', '██   ██', '██   ██'],
18}
19
20const C = {
21  head: '#9aa8b6',
22  green: '#2ef07a',
23  letter: '#6dffa8',
24  fill: ['#0b5d2a', '#04331a'], // container fill flashes between these
25  rib: ['#14803d', '#0b5d2a'],
26  ring: '#0d4d27',
27  line: '#d9e1e8', // the white line art
28  grey: '#5b6670',
29  greyRib: '#3a434d',
30  rail: '#8a96a3',
31  plating: '#1f2a35',
32  name: '#b8c4cf',
33  funnel: '#e0a526',
34  red: '#ff4d4d',
35  mast: '#8a96a3',
36  windows: ['#f2b705', '#c99a2e', '#8a6d2a', '#2a2f36'],
37  star: '#4a545e',
38  starHi: '#c9d3dc',
39  water: ['#16222d', '#1d2c39', '#24394a'],
40  reflect: ['#0b5d2a', '#1fb35a'],
41  wake: ['#e8f4ff', '#a9c9de', '#5f8aa5'],
42  smoke: ['#8a96a3', '#6b7680', '#4a545e'],
43}
44
45type Props = { file: string; lines: number; tall: boolean }
46type State = { frame: number; stop?: () => void }
47type Cell = { ch: string; color?: string; bold?: boolean; bg?: string }
48
49// The ship's layout: columns from its stern (x), rows from the top of the band.
50const BOX_W = 11 // an LGTM container: border, rib, 7-wide letter, rib, border
51const STACK_X = 18 // where the containers start
52const STACK_W = 4 * BOX_W + 3
53const SW = STACK_X + STACK_W + 6 // stern to bow tip
54const TOP = 3 // roof of the bridge and top of the LGTM tier
55
56// 18 rows tall with the grey tier and a deeper hull; 14 without.
57const layout = (tall: boolean) => {
58  const lower = tall ? 3 : 0
59  const hullRows = tall ? 3 : 2
60  const rail = TOP + 7 + lower
61  const hull = rail + 1
62  const water = hull + hullRows
63  return { lower, hullRows, rail, hull, water, rows: water + 1 }
64}
65
66const hash = (a: number, b: number, c = 0) => {
67  let h = (a * 374761393 + b * 668265263 + c * 2147483647) | 0
68  h = Math.imul(h ^ (h >>> 13), 1274126177)
69  return ((h ^ (h >>> 16)) >>> 0) / 4294967296
70}
71
72const commas = (n: number) => String(n).replace(/\B(?=(\d{3})+(?!\d))/g, ',')
73
74// Fast in, a slow glide through the middle, fast out.
75const shipX = (p: number, w: number) => {
76  const u = 2 * p - 1
77  const centre = Math.round((w - SW) / 2)
78  return Math.round(centre + (0.7 * u * u * u + 0.3 * u) * (w / 2 + SW / 2 + 2))
79}
80
81const draw = (frame: number, w: number, props: Props): Cell[][] => {
82  const L = layout(props.tall)
83  const grid: Cell[][] = Array.from({ length: L.rows }, () => Array.from({ length: w }, () => ({ ch: ' ' })))
84  const put = (row: number, col: number, ch: string, color?: string, bold?: boolean, bg?: string) => {
85    const line = grid[row]
86    if (line !== undefined && col >= 0 && col < w) line[col] = { ch, color, bold, bg }
87  }
88  const text = (row: number, col: number, s: string, color?: string, bold?: boolean) =>
89    [...s].forEach((ch, i) => put(row, col + i, ch, color, bold))
90  const clear = (row: number, from: number, to: number) => {
91    for (let c = from; c <= to; c++) put(row, c, ' ')
92  }
93
94  const p = Math.min(frame / FRAMES, 1)
95  const u = 2 * p - 1
96  const x = shipX(p, w)
97  const hang = Math.abs(u) < 0.4
98  const flash = Math.floor(frame / FLASH_FRAMES) % 2
99  const bowCol = (k: number) => x + SW - 1 - 2 * k // the raked bow, row k of the hull
100
101  // Night sky: sparse stars that twinkle.
102  for (let r = 1; r < L.water; r++) {
103    for (let c = 0; c < w; c++) {
104      if (hash(c, r) < 0.025) {
105        const tw = hash(c, r, Math.floor(frame / 6))
106        put(r, c, tw > 0.88 ? '✦' : '·', tw > 0.88 ? C.starHi : C.star)
107      }
108    }
109  }
110
111  // The radar ring behind the bow containers.
112  const cx = x + STACK_X + 3 * (BOX_W + 1) + 5
113  const cy = TOP + 3
114  for (let a = -110; a <= 110; a += 6) {
115    const rad = (a * Math.PI) / 180
116    const col = Math.round(cx + Math.sin(rad) * 17)
117    const row = Math.round(cy - Math.cos(rad) * 7)
118    if (row >= 1 && row < L.water) put(row, col, '·', C.ring)
119  }
120
121  // Dark water with faint swell lines, the containers' glow reflected, and a wake.
122  for (let c = 0; c < w; c++) {
123    const k = (c + Math.floor(frame / 3)) % 7
124    put(L.water, c, k < 2 ? '─' : k === 4 ? '‐' : ' ', C.water[k % 3])
125  }
126  for (let c = x + STACK_X; c < x + STACK_X + STACK_W; c++) {
127    if ((c + Math.floor(frame / 2)) % 3 !== 0) put(L.water, c, '─', C.reflect[(c + flash) % 2])
128  }
129  for (let i = 1; i <= 14; i++) {
130    put(L.water, x - i, i < 4 ? '═' : i < 9 ? '─' : '‐', C.wake[Math.min(2, Math.floor(i / 5))])
131  }
132
133  // The ship's silhouette hides everything behind it.
134  for (let r = TOP; r < L.rail; r++) clear(r, x + STACK_X, x + STACK_X + STACK_W - 1)
135  for (let r = TOP; r < L.rail; r++) clear(r, x, x + 16)
136  clear(L.rail, x, bowCol(0))
137  for (let k = 0; k < L.hullRows; k++) clear(L.hull + k, x, bowCol(k) + 1)
138
139  // Smoke drifts back from the funnel.
140  for (let k = 1; k <= 6; k++) {
141    const col = x + 3 - k * 2 - (Math.floor(frame / 3) % 2)
142    put(1 + (k % 2), col, k < 3 ? 'o' : k < 5 ? '°' : '·', C.smoke[Math.min(2, Math.floor((k - 1) / 2))])
143  }
144
145  // Funnel: gold with a green band. Mast with a blinking red light.
146  text(1, x + 4, '▆▆▆▆▆', C.green)
147  text(2, x + 4, '█████', C.funnel)
148  put(1, x + 12, '●', Math.floor(frame / 8) % 2 === 0 ? C.red : C.grey)
149  put(2, x + 12, '│', C.mast)
150
151  // Bridge: a roof slab, an outlined block, a grid of gold windows.
152  text(TOP, x, '▀'.repeat(17), C.line)
153  for (let r = TOP + 1; r < L.rail; r++) {
154    put(r, x + 2, '│', C.line)
155    put(r, x + 14, '│', C.line)
156    if ((r - TOP) % 2 === 1 && r < L.rail - 1) {
157      for (let c = 4; c <= 12; c += 2) {
158        const shade = Math.floor(hash(c, r, Math.floor(frame / 12)) * C.windows.length)
159        put(r, x + c, '■', C.windows[shade])
160      }
161    }
162  }
163
164  // The LGTM tier: green outlines, ribbed dark green fill that flashes, bright letters.
165  ;['L', 'G', 'T', 'M'].forEach((letter, i) => {
166    const left = x + STACK_X + i * (BOX_W + 1)
167    const fill = C.fill[flash]
168    text(TOP, left, '┌' + '─'.repeat(BOX_W - 2) + '┐', C.green)
169    for (let r = 0; r < 5; r++) {
170      put(TOP + 1 + r, left, '│', C.green)
171      put(TOP + 1 + r, left + BOX_W - 1, '│', C.green)
172      const glyph = [...(GLYPHS[letter]?.[r] ?? '')]
173      for (let c = 1; c < BOX_W - 1; c++) {
174        // Ribs run down the strips either side of the letter, never through it.
175        const rib = c === 1 || c === BOX_W - 2
176        if (glyph[c - 2] === '█') put(TOP + 1 + r, left + c, '█', C.letter, true, fill)
177        else put(TOP + 1 + r, left + c, rib ? '│' : ' ', C.rib[flash], false, fill)
178      }
179    }
180    text(TOP + 6, left, '└' + '─'.repeat(BOX_W - 2) + '┘', C.green)
181  })
182
183  // The grey tier underneath.
184  if (L.lower > 0) {
185    for (let i = 0; i < 6; i++) {
186      const left = x + STACK_X + i * 8
187      const r0 = TOP + 7
188      text(r0, left, '┌─────┐', C.grey)
189      put(r0 + 1, left, '│', C.grey)
190      text(r0 + 1, left + 1, '╎ ╎ ╎', C.greyRib)
191      put(r0 + 1, left + 6, '│', C.grey)
192      text(r0 + 2, left, '└─────┘', C.grey)
193    }
194  }
195
196  // Deck rail of little squares, then the hull with its raked bow.
197  for (let c = x; c < bowCol(0); c++) put(L.rail, c, '▫', C.rail)
198  for (let k = 0; k < L.hullRows; k++) {
199    const r = L.hull + k
200    const end = bowCol(k)
201    const edge = k === 0 || k === L.hullRows - 1
202    put(r, x, k === 0 ? '┌' : k === L.hullRows - 1 ? '└' : '│', C.line)
203    for (let c = x + 1; c < end; c++) put(r, c, '─', edge ? C.line : C.plating)
204    put(r, end, k === L.hullRows - 1 ? '╯' : '╲', C.line)
205    if (k === 0) put(r, end + 1, '╲', C.line)
206  }
207  const name = ' L G T M   L I N E S '
208  const nameRow = L.hull + (L.hullRows === 2 ? 0 : 1)
209  text(nameRow, x + Math.round((bowCol(1) - x - name.length) / 2), name, C.name, true)
210
211  // Header strip, as in the video.
212  const left = hang ? `let's ship it to ` : 'L-G-T-M  ·  CHORUS 1  ·  SHIPPING'
213  text(0, 0, left, hang ? C.line : C.head, hang)
214  if (hang) text(0, left.length, 'PROD', C.green, true)
215  const plus = `+${commas(props.lines)} LINES`
216  const right = `${plus} THAT I DIDN'T READ`
217  const rx = Math.max(left.length + 6, w - right.length)
218  text(0, rx, plus, C.green, true)
219  text(0, rx + plus.length, right.slice(plus.length), C.head)
220
221  return grid
222}
223
224const Ship: ClientModule<Props, State> = (props, surface) => {
225  const { Box, Text } = surface.elements
226  if (surface.state === undefined) {
227    const stop = surface.every(FRAME_MS, () => {
228      const now = surface.state ?? { frame: 0 }
229      if (now.frame >= FRAMES) {
230        now.stop?.()
231        return
232      }
233      surface.setState({ ...now, frame: now.frame + 1 })
234    })
235    surface.setState({ frame: 0, stop })
236  }
237
238  const frame = surface.state?.frame ?? 0
239  const w = surface.columns > 0 ? surface.columns : 100
240  const grid = frame >= FRAMES ? [] : draw(frame, w, props)
241
242  return (
243    <Box flexDirection="column" width={w}>
244      {grid.map((line, r) => {
245        // One Text per run of cells that share a style.
246        const runs: Cell[] = []
247        for (const cell of line) {
248          const last = runs[runs.length - 1]
249          if (last !== undefined && last.color === cell.color && last.bold === cell.bold && last.bg === cell.bg)
250            last.ch += cell.ch
251          else runs.push({ ...cell })
252        }
253        return (
254          <Box key={`r${r}`} flexDirection="row">
255            {runs.map((run, i) => (
256              <Text key={`c${i}`} color={run.color} backgroundColor={run.bg} bold={run.bold} wrap="truncate-end">
257                {run.ch}
258              </Text>
259            ))}
260          </Box>
261        )
262      })}
263    </Box>
264  )
265}
266
267export default Ship
268

1export type Flash = { file: string; lines: number; at: number } | null
2
3declare module 'claude-code' {
4  interface PluginState {
5    'lgtm-flash': { flash: Flash }
6  }
7}
8