stamp

1import { atom, read, update } from 'claude-code'
2import type { EngineInterface, ModelUsage, Register, RenderNode } from 'claude-code'
3
4import type { StampChip, StampReceipt } from '../types'
5import { KZ, costOf, fmtPct, fmtTokens, fmtUsd, pxOf, svg, svgText, textWidth, toolColor, toolGlyph } from './lib/kz.ts'
6
7// How a TurnDuration line finds its turn
8// ---------------------------------------
9// The line's props carry no turn id: only the sampled word and `durationMs`.
10// Every main-loop turn.complete appends a receipt, in order of completion,
11// holding the same wall-clock `durationMs` the engine formats on that line.
12// A line takes the receipt whose duration is closest to its own within a small
13// tolerance (1.5 s or 3 %), the most recent one winning a tie, so two turns of
14// equal length resolve to the later (the one drawn last). A line with no such
15// receipt (a resumed transcript, a turn from before the mod loaded) keeps the
16// engine's own text. The match needs no write while drawing, which a render
17// hook may not do, and survives a reload: the receipts live in $.state.
18
19const receiptsAtom = atom({ plugin: 'stamp', key: 'receipts' } as const, [])
20const onAtom = atom({ plugin: 'stamp', key: 'isOn' } as const, true)
21const KEEP = 120
22
23type Pending = {
24  turnId: string
25  startedAt: number
26  startCost?: number
27  startCtx?: number
28  tools: number
29  families: Record<string, StampChip>
30  /** The main loop's requests summed; undefined until one reports usage. */
31  steps?: ModelUsage
32  model: string
33}
34
35let current: Pending | undefined
36
37const FAMILY_ORDER = ['shell', 'edit', 'read', 'search', 'agent', 'web', 'task', 'mcp', 'other']
38
39function familyOf(tool: string): string {
40  if (tool === 'Bash' || tool === 'PowerShell') return 'shell'
41  if (tool === 'Edit' || tool === 'Write' || tool === 'NotebookEdit' || tool === 'MultiEdit') return 'edit'
42  if (tool === 'Read') return 'read'
43  if (tool === 'Glob' || tool === 'Grep' || tool === 'LSP') return 'search'
44  if (tool === 'Agent' || tool === 'Task' || tool === 'Workflow') return 'agent'
45  if (tool.startsWith('Web')) return 'web'
46  if (tool.startsWith('Todo') || tool.startsWith('Task')) return 'task'
47  if (tool.startsWith('mcp__')) return 'mcp'
48  return 'other'
49}
50
51/** 42s, 1m 4s, 1h 2m: the way the engine's own line reads. */
52function fmtTurn(ms: number): string {
53  const s = Math.max(0, Math.round(ms / 1000))
54  if (s < 60) return `${s}s`
55  const m = Math.floor(s / 60)
56  if (m < 60) return `${m}m ${s % 60}s`
57  return `${Math.floor(m / 60)}h ${m % 60}m`
58}
59
60/** The receipt a TurnDuration line of `durationMs` belongs to, or undefined. */
61function matchReceipt(receipts: readonly StampReceipt[], durationMs: number): StampReceipt | undefined {
62  const tolerance = Math.max(1500, durationMs * 0.03)
63  let best: StampReceipt | undefined
64  let bestDiff = Infinity
65  for (const r of receipts) {
66    const diff = Math.abs(r.durationMs - durationMs)
67    if (diff <= tolerance && diff <= bestDiff) {
68      best = r
69      bestDiff = diff
70    }
71  }
72  return best
73}
74
75type Seg = { text: string; kind: 'lead' | 'strong' | 'dim' | 'chip' | 'cost' | 'ctx'; color?: string }
76
77/** The receipt as a list of segments both surfaces draw. */
78function segments(r: StampReceipt, durationMs: number): Seg[] {
79  const out: Seg[] = [{ text: '⏱ ', kind: 'lead', color: KZ.violet }, { text: fmtTurn(durationMs), kind: 'strong' }]
80  if (r.tools > 0) {
81    out.push({ text: ` · ${r.tools} tool${r.tools === 1 ? '' : 's'}`, kind: 'dim' })
82    for (const c of r.chips) out.push({ text: `${toolGlyph(c.tool)}${c.n}`, kind: 'chip', color: toolColor(c.tool) })
83  }
84  if (r.inTokens !== undefined && r.outTokens !== undefined) {
85    out.push({ text: ` · ↑${fmtTokens(r.inTokens)} ↓${fmtTokens(r.outTokens)} tok`, kind: 'dim' })
86  }
87  if (r.costUsd !== undefined) out.push({ text: ` · ${fmtUsd(r.costUsd)}`, kind: 'cost', color: KZ.yellow })
88  if (r.ctxPercent !== undefined) {
89    const d = r.ctxDelta !== undefined && Math.abs(r.ctxDelta) >= 1 ? ` (${r.ctxDelta > 0 ? '+' : ''}${Math.round(r.ctxDelta)}%)` : ''
90    const color = r.ctxPercent >= 80 ? KZ.red : r.ctxPercent >= 60 ? KZ.amber : KZ.cyan
91    out.push({ text: ` · ctx ${fmtPct(r.ctxPercent)}${d}`, kind: 'ctx', color })
92  }
93  if (r.reason === 'aborted') out.push({ text: ' · interrupted', kind: 'ctx', color: KZ.amber })
94  else if (r.reason === 'error' || r.reason === 'refusal') out.push({ text: ` · ${r.reason}`, kind: 'ctx', color: KZ.red })
95  return out
96}
97
98const NO_USAGE: ModelUsage = { input_tokens: 0, output_tokens: 0, cache_read_input_tokens: 0, cache_creation_input_tokens: 0 }
99
100function sumUsage(a: ModelUsage | undefined, b: ModelUsage | null): ModelUsage | undefined {
101  if (!b) return a
102  const base = a ?? NO_USAGE
103  return {
104    input_tokens: base.input_tokens + b.input_tokens,
105    output_tokens: base.output_tokens + b.output_tokens,
106    cache_read_input_tokens: base.cache_read_input_tokens + b.cache_read_input_tokens,
107    cache_creation_input_tokens: base.cache_creation_input_tokens + b.cache_creation_input_tokens,
108  }
109}
110
111async function startTurn($: EngineInterface, turnId: string): Promise<void> {
112  const p: Pending = { turnId, startedAt: await $.clock.now(), tools: 0, families: {}, model: '' }
113  current = p
114  try {
115    const u = await $.session.usage()
116    p.startCost = u.cost?.usd
117    p.startCtx = u.context.percent
118  } catch {
119    // No figures at the start: the receipt leaves cost and the context change out.
120  }
121}
122
123async function finishTurn(
124  $: EngineInterface,
125  e: { turnId: string; durationMs: number; reason: string; usage?: ModelUsage & { model: string } },
126): Promise<void> {
127  const p = current?.turnId === e.turnId ? current : undefined
128  if (p) current = undefined
129  const usage: ModelUsage | undefined = e.usage ?? p?.steps
130  const model = e.usage?.model ?? p?.model ?? ''
131  let endCost: number | undefined
132  let ctx: number | undefined
133  try {
134    const u = await $.session.usage()
135    endCost = u.cost?.usd
136    ctx = u.context.percent
137  } catch {
138    // Keep what the turn's own usage says.
139  }
140  const delta = endCost !== undefined && p?.startCost !== undefined ? endCost - p.startCost : undefined
141  const costUsd = delta !== undefined && delta >= 0 ? delta : usage ? costOf(model, usage) : undefined
142  const chips = p
143    ? FAMILY_ORDER.map(f => p.families[f]).filter((c): c is StampChip => c !== undefined)
144    : []
145  const receipt: StampReceipt = {
146    turnId: e.turnId,
147    durationMs: e.durationMs,
148    endedAt: await $.clock.now(),
149    reason: e.reason,
150    tools: p?.tools ?? 0,
151    chips,
152    inTokens: usage ? usage.input_tokens + usage.cache_creation_input_tokens : undefined,
153    outTokens: usage?.output_tokens,
154    cacheRead: usage?.cache_read_input_tokens,
155    costUsd,
156    ctxPercent: ctx,
157    ctxDelta: ctx !== undefined && p?.startCtx !== undefined ? ctx - p.startCtx : undefined,
158  }
159  await update($, receiptsAtom, prev => [...prev.filter(r => r.turnId !== receipt.turnId), receipt].slice(-KEEP))
160}
161
162async function setOn($: EngineInterface, isOn: boolean): Promise<void> {
163  await update($, onAtom, () => isOn)
164  await $.store.set('isOn', isOn)
165}
166
167function lastText(r: StampReceipt | undefined): string {
168  if (!r) return 'no turn finished yet'
169  // A chip reads after a space, as the terminal draws it (` $2`).
170  return segments(r, r.durationMs).map(s => (s.kind === 'chip' ? ' ' : '') + s.text).join('').replace(/\s+/g, ' ').trim()
171}
172
173export const register: Register = on => {
174  on('session.start', async ($, e, next) => {
175    const started = await next(e)
176    current = undefined
177    await $.command.register({ name: 'stamp', description: 'KOZMOS: toggle the turn receipt (/stamp on|off|last)', argumentHint: '[on|off|last]', immediate: true })
178    try {
179      const stored = await $.store.get('isOn')
180      await update($, onAtom, () => stored !== false)
181    } catch {
182      // Default on.
183    }
184    return started
185  })
186
187  on('command.run', { command: 'stamp' }, async ($, e) => {
188    const arg = e.args.trim().toLowerCase()
189    if (arg === 'last') {
190      const list = await read($, receiptsAtom)
191      return { text: `Last turn: ${lastText(list[list.length - 1])}` }
192    }
193    const isOn = arg === 'on' ? true : arg === 'off' ? false : !(await read($, onAtom))
194    await setOn($, isOn)
195    return { text: isOn ? 'Stamp on: each finished turn closes with a receipt.' : 'Stamp off: the engine draws its own closing line.' }
196  })
197
198  on('turn.start', async ($, e, next) => {
199    await startTurn($, e.turnId).catch(() => undefined)
200    return next(e)
201  }).catch(($, e, next) => next(e))
202
203  on('turn.step', async function* ($, e, next) {
204    const r = yield* next(e)
205    if (e.agentId === undefined && current && current.turnId === e.turnId) {
206      current.steps = sumUsage(current.steps, r.usage)
207      current.model = r.usage?.model ?? e.model
208    }
209    return r
210  })
211
212  on('tool.call', async ($, e, next) => {
213    if (e.agentId === undefined && current) {
214      const tool = String(e.tool)
215      const fam = familyOf(tool)
216      current.tools++
217      const c = current.families[fam]
218      current.families[fam] = c ? { ...c, n: c.n + 1 } : { family: fam, tool, n: 1 }
219    }
220    return next(e)
221  }).catch(($, e, next) => next(e))
222
223  on('turn.complete', async ($, e, next) => {
224    const r = await next(e)
225    if (e.agentId === undefined) void finishTurn($, e).catch(() => undefined)
226    return r
227  }).catch(($, e, next) => next(e))
228
229  on('ui.render', { component: 'TurnDuration' }, async ($, e, next) => {
230    if (!(await read($, onAtom))) return next(e)
231    const receipt = matchReceipt(await read($, receiptsAtom), e.props.durationMs)
232    if (!receipt) return next(e)
233    const segs = segments(receipt, e.props.durationMs)
234    const ui = $.ui.resolve(e)
235    const alt = `${e.props.word} for ${lastText({ ...receipt, durationMs: e.props.durationMs })}`
236
237    if ('Svg' in ui && e.surface !== 'terminal') {
238      const { Svg } = ui
239      const W = pxOf(e.viewport?.columns, 90)
240      const { source, width } = receiptSvg(segs, W)
241      return <Svg source={source} alt={alt} width={width} height={22} />
242    }
243
244    const { Box, Text } = ui
245    const parts: RenderNode[] = segs.map((s, i) => {
246      if (s.kind === 'chip') return <Text key={`s${i}`} color={s.color}> {s.text}</Text>
247      if (s.kind === 'strong') return <Text key={`s${i}`} bold>{s.text}</Text>
248      if (s.kind === 'dim') return <Text key={`s${i}`} dimColor>{s.text}</Text>
249      return <Text key={`s${i}`} color={s.color}>{s.text}</Text>
250    })
251    return (
252      <Box flexDirection="row">
253        <Text wrap="truncate-end">{parts}</Text>
254      </Box>
255    )
256  })
257}
258
259/** The receipt as one SVG row: text segments and the family chips as pills. */
260function receiptSvg(segs: readonly Seg[], maxW: number): { source: string; width: number } {
261  const size = 12
262  const body: string[] = []
263  let x = 2
264  for (const s of segs) {
265    if (s.kind === 'chip') {
266      const w = textWidth(s.text, 11) + 12
267      body.push(`<rect x="${x + 4}" y="3" width="${w}" height="16" rx="8" fill="${s.color}" opacity=".18"/>`)
268      body.push(svgText(x + 4 + w / 2, 15, s.text, { size: 11, weight: 650, anchor: 'middle', fill: s.color }))
269      x += w + 4
270      continue
271    }
272    const opts = s.kind === 'strong'
273      ? { size, weight: 650 }
274      : s.kind === 'dim'
275        ? { cls: 's', size }
276        : { size, weight: 600, fill: s.color }
277    body.push(svgText(x, 15, s.text, opts))
278    x += textWidth(s.text, size)
279  }
280  const width = Math.min(maxW, Math.ceil(x + 6))
281  return { source: svg(width, 22, body.join('')), width }
282}
283

1// GENERATED by scripts/sync-shared.mjs from shared/kz.ts. Do not edit here.
2// KOZMOS shared kit. Source of truth: shared/kz.ts at the bundle root.
3// `node scripts/sync-shared.mjs` copies it into every mod as hooks/lib/kz.ts,
4// because a hooks module may only import files inside its own plugin.
5// Edit the root copy, never a mod's copy.
6
7// ---------------------------------------------------------------------------
8// Palette: one neon family across every KOZMOS mod.
9
10export const KZ = {
11  violet: '#a78bfa',
12  magenta: '#f472b6',
13  cyan: '#22d3ee',
14  teal: '#2dd4bf',
15  green: '#4ade80',
16  lime: '#a3e635',
17  yellow: '#facc15',
18  amber: '#fb923c',
19  red: '#f87171',
20  blue: '#60a5fa',
21  clay: '#d97757',
22  ink: '#1f1e1d',
23  mist: '#9ca3af',
24} as const
25
26/** Tool families, colored the same in every mod. */
27export function toolColor(tool: string): string {
28  const t = String(tool)
29  if (t === 'Bash' || t === 'PowerShell') return KZ.green
30  if (t === 'Edit' || t === 'Write' || t === 'NotebookEdit' || t === 'MultiEdit') return KZ.yellow
31  if (t === 'Read' || t === 'Glob' || t === 'Grep' || t === 'LSP') return KZ.blue
32  if (t === 'Agent' || t === 'Task' || t === 'Workflow') return KZ.violet
33  if (t.startsWith('Web')) return KZ.cyan
34  if (t.startsWith('Todo') || t.startsWith('Task')) return KZ.teal
35  if (t.startsWith('mcp__')) return KZ.magenta
36  return KZ.mist
37}
38
39/** A short glyph per tool family. */
40export function toolGlyph(tool: string): string {
41  const t = String(tool)
42  if (t === 'Bash' || t === 'PowerShell') return '$'
43  if (t === 'Edit' || t === 'Write' || t === 'NotebookEdit') return '✎'
44  if (t === 'Read') return '◉'
45  if (t === 'Glob' || t === 'Grep') return '⌕'
46  if (t === 'Agent') return '◈'
47  if (t.startsWith('Web')) return '◍'
48  if (t.startsWith('Todo') || t.startsWith('Task')) return '☑'
49  if (t.startsWith('mcp__')) return '⬡'
50  return '•'
51}
52
53// ---------------------------------------------------------------------------
54// Colors.
55
56export function hexToRgb(hex: string): [number, number, number] {
57  const h = hex.replace('#', '')
58  const n = parseInt(h.length === 3 ? h.split('').map(c => c + c).join('') : h, 16)
59  return [(n >> 16) & 255, (n >> 8) & 255, n & 255]
60}
61
62export function rgbToHex(r: number, g: number, b: number): string {
63  const c = (v: number) => Math.max(0, Math.min(255, Math.round(v))).toString(16).padStart(2, '0')
64  return `#${c(r)}${c(g)}${c(b)}`
65}
66
67export function mix(a: string, b: string, t: number): string {
68  const [r1, g1, b1] = hexToRgb(a)
69  const [r2, g2, b2] = hexToRgb(b)
70  const k = clamp01(t)
71  return rgbToHex(r1 + (r2 - r1) * k, g1 + (g2 - g1) * k, b1 + (b2 - b1) * k)
72}
73
74/** Green at 0, yellow at 0.6, red at 1: the heat of a gauge. */
75export function heat(t: number): string {
76  const k = clamp01(t)
77  return k < 0.6 ? mix(KZ.green, KZ.yellow, k / 0.6) : mix(KZ.yellow, KZ.red, (k - 0.6) / 0.4)
78}
79
80/** A smooth rainbow for hues 0..1 (for auroras, plasma and the like). */
81export function hue(h: number, s = 0.75, l = 0.6): string {
82  const k = ((h % 1) + 1) % 1
83  const a = s * Math.min(l, 1 - l)
84  const f = (n: number) => {
85    const x = (n + k * 12) % 12
86    return l - a * Math.max(-1, Math.min(x - 3, 9 - x, 1))
87  }
88  return rgbToHex(f(0) * 255, f(8) * 255, f(4) * 255)
89}
90
91export function hexToInt(hex: string): number {
92  const [r, g, b] = hexToRgb(hex)
93  return (r << 16) | (g << 8) | b
94}
95
96// ---------------------------------------------------------------------------
97// Numbers and text.
98
99export const clamp01 = (v: number): number => (Number.isFinite(v) ? Math.max(0, Math.min(1, v)) : 0)
100
101export function fmtTokens(n: number): string {
102  if (!Number.isFinite(n)) return '—'
103  // Each unit starts where the one below would round up to 1000 of itself.
104  if (n >= 999.5e6) return `${(n / 1e9).toFixed(1)}B`
105  if (n >= 999_500) return `${(n / 1e6).toFixed(n >= 1e7 ? 0 : 1)}M`
106  if (n >= 999.5) return `${(n / 1e3).toFixed(n >= 1e4 ? 0 : 1)}k`
107  return `${Math.round(n)}`
108}
109
110export function fmtUsd(usd: number): string {
111  if (!Number.isFinite(usd)) return '$—'
112  if (usd < 0.01 && usd > 0) return '<$0.01'
113  return usd < 100 ? `$${usd.toFixed(2)}` : `$${Math.round(usd)}`
114}
115
116/** 0:42, 3:07, 1:02:33. */
117export function fmtClock(ms: number): string {
118  const s = Math.max(0, Math.round(ms / 1000))
119  const h = Math.floor(s / 3600)
120  const m = Math.floor((s % 3600) / 60)
121  const ss = String(s % 60).padStart(2, '0')
122  return h ? `${h}:${String(m).padStart(2, '0')}:${ss}` : `${m}:${ss}`
123}
124
125/** 42s, 7m, 2h41m, 3d4h: compact durations for countdowns. */
126export function fmtSpan(ms: number): string {
127  const s = Math.max(0, Math.round(ms / 1000))
128  if (s < 60) return `${s}s`
129  const m = Math.floor(s / 60)
130  if (m < 60) return `${m}m`
131  const h = Math.floor(m / 60)
132  if (h < 48) return `${h}h${String(m % 60).padStart(2, '0')}m`
133  return `${Math.floor(h / 24)}d${h % 24}h`
134}
135
136export function fmtPct(p: number | undefined): string {
137  return p === undefined || !Number.isFinite(p) ? '—' : `${Math.round(p)}%`
138}
139
140export function clip(s: string, max: number): string {
141  const one = s.replace(/\s+/g, ' ').trim()
142  return one.length > max ? one.slice(0, Math.max(1, max - 1)) + '…' : one
143}
144
145export function padEnd(s: string, n: number): string {
146  return s.length >= n ? s.slice(0, n) : s + ' '.repeat(n - s.length)
147}
148
149export function padStart(s: string, n: number): string {
150  return s.length >= n ? s.slice(s.length - n) : ' '.repeat(n - s.length) + s
151}
152
153/** `claude-opus-5-5[1m]` → `Opus 5.5`. */
154export function modelName(id: string | undefined): string {
155  if (!id) return '—'
156  const m = /(fable|mythos|opus|sonnet|haiku)-(\d+)(?:-(\d{1,2})(?!\d))?/i.exec(id)
157  if (!m) return id.replace(/^claude-/, '').replace(/\[.*\]$/, '')
158  const fam = m[1]!
159  return `${fam.charAt(0).toUpperCase()}${fam.slice(1).toLowerCase()} ${m[2]}${m[3] ? '.' + m[3] : ''}`
160}
161
162/** Last path segment, either slash. */
163export function baseName(p: string): string {
164  const parts = p.split(/[\\/]/).filter(Boolean)
165  return parts[parts.length - 1] ?? p
166}
167
168/** A stable small hash for seeding. */
169export function hash(s: string): number {
170  let h = 2166136261
171  for (let i = 0; i < s.length; i++) {
172    h ^= s.charCodeAt(i)
173    h = Math.imul(h, 16777619)
174  }
175  return h >>> 0
176}
177
178/** Deterministic 0..1 noise from two ints. */
179export function noise(x: number, y: number): number {
180  const s = Math.sin(x * 12.9898 + y * 78.233) * 43758.5453
181  return s - Math.floor(s)
182}
183
184/** A seeded PRNG (mulberry32). */
185export function rng(seed: number): () => number {
186  let a = seed >>> 0
187  return () => {
188    a = (a + 0x6d2b79f5) >>> 0
189    let t = a
190    t = Math.imul(t ^ (t >>> 15), t | 1)
191    t ^= t + Math.imul(t ^ (t >>> 7), t | 61)
192    return ((t ^ (t >>> 14)) >>> 0) / 4294967296
193  }
194}
195
196// ---------------------------------------------------------------------------
197// Text gauges for the terminal.
198
199const EIGHTHS = ['', '▏', '▎', '▍', '▌', '▋', '▊', '▉']
200
201/** A smooth bar with eighth blocks: `█████▍    `. */
202export function bar(ratio: number, width: number, empty = '░'): string {
203  const w = Math.max(1, Math.floor(width))
204  const exact = clamp01(ratio) * w
205  const full = Math.floor(exact)
206  const part = EIGHTHS[Math.floor((exact - full) * 8)] ?? ''
207  const used = full + (part ? 1 : 0)
208  return '█'.repeat(full) + part + empty.repeat(Math.max(0, w - used))
209}
210
211/** A segmented gauge: `▰▰▰▱▱▱`. */
212export function pips(ratio: number, width: number, on = '▰', off = '▱'): string {
213  const w = Math.max(1, Math.floor(width))
214  const n = Math.round(clamp01(ratio) * w)
215  return on.repeat(n) + off.repeat(w - n)
216}
217
218const SPARK = '▁▂▃▄▅▆▇█'
219
220/** A sparkline of the last `width` values, scaled to their own max (or `max`). */
221export function sparkline(values: readonly number[], width: number, max?: number): string {
222  const tail = values.slice(-Math.max(1, width))
223  const top = max ?? Math.max(1e-9, ...tail)
224  const line = tail.map(v => SPARK[Math.min(7, Math.max(0, Math.round((v / top) * 7)))] ?? '▁').join('')
225  return line.padStart(width, ' ')
226}
227
228/** Braille line graph, 2 samples per cell, `rows` cells tall. */
229export function brailleGraph(values: readonly number[], width: number, rows: number, max?: number): string[] {
230  const samples = values.slice(-(width * 2))
231  const top = max ?? Math.max(1e-9, ...samples)
232  const dotsTall = rows * 4
233  const grid: number[][] = Array.from({ length: rows }, () => Array.from({ length: width }, () => 0))
234  const offset = width * 2 - samples.length
235  // Dot bits per column, from the bottom row of a cell up.
236  const LEFT = [0x40, 0x04, 0x02, 0x01]
237  const RIGHT = [0x80, 0x20, 0x10, 0x08]
238  samples.forEach((v, i) => {
239    const x = offset + i
240    const col = Math.floor(x / 2)
241    const isRight = x % 2 === 1
242    const h = Math.round(clamp01(v / top) * (dotsTall - 1))
243    for (let d = 0; d <= h; d++) {
244      const row = rows - 1 - Math.floor(d / 4)
245      const bits = isRight ? RIGHT : LEFT
246      const cellRow = grid[row]
247      if (cellRow && col >= 0) cellRow[col] = (cellRow[col] ?? 0) | bits[d % 4]!
248    }
249  })
250  return grid.map(r => r.map(b => String.fromCharCode(0x2800 + b)).join(''))
251}
252
253// ---------------------------------------------------------------------------
254// Raster: a grid of colored cells, packed as the engine wants it.
255
256const B64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
257
258export function toBase64(bytes: Uint8Array): string {
259  let out = ''
260  let i = 0
261  for (; i + 2 < bytes.length; i += 3) {
262    const n = (bytes[i]! << 16) | (bytes[i + 1]! << 8) | bytes[i + 2]!
263    out += B64[(n >> 18) & 63]! + B64[(n >> 12) & 63]! + B64[(n >> 6) & 63]! + B64[n & 63]!
264  }
265  const rest = bytes.length - i
266  if (rest === 1) {
267    const n = bytes[i]! << 16
268    out += B64[(n >> 18) & 63]! + B64[(n >> 12) & 63]! + '=='
269  } else if (rest === 2) {
270    const n = (bytes[i]! << 16) | (bytes[i + 1]! << 8)
271    out += B64[(n >> 18) & 63]! + B64[(n >> 12) & 63]! + B64[(n >> 6) & 63]! + '='
272  }
273  return out
274}
275
276/** The terminal's own default color, for a cell's foreground or background. */
277export const DEFAULT_COLOR = 0x01000000
278
279export class Canvas {
280  readonly cols: number
281  readonly rows: number
282  private readonly words: Uint32Array
283
284  constructor(cols: number, rows: number) {
285    this.cols = Math.max(1, Math.min(512, Math.floor(cols)))
286    this.rows = Math.max(1, Math.min(256, Math.floor(rows)))
287    this.words = new Uint32Array(this.cols * this.rows * 3)
288    this.clear()
289  }
290
291  clear(bg: number = DEFAULT_COLOR): void {
292    for (let i = 0; i < this.cols * this.rows; i++) {
293      this.words[i * 3] = 0x20
294      this.words[i * 3 + 1] = DEFAULT_COLOR
295      this.words[i * 3 + 2] = bg
296    }
297  }
298
299  /** Puts one width-1 character; colors are '#rrggbb' or a packed int. */
300  set(x: number, y: number, ch: string, fg?: string | number, bg?: string | number): void {
301    const cx = Math.floor(x)
302    const cy = Math.floor(y)
303    if (cx < 0 || cy < 0 || cx >= this.cols || cy >= this.rows) return
304    const i = (cy * this.cols + cx) * 3
305    const code = ch.codePointAt(0) ?? 0x20
306    this.words[i] = code > 0xffff || code < 0x20 ? 0x20 : code
307    if (fg !== undefined) this.words[i + 1] = typeof fg === 'number' ? fg : hexToInt(fg)
308    if (bg !== undefined) this.words[i + 2] = typeof bg === 'number' ? bg : hexToInt(bg)
309  }
310
311  /** Writes a string left to right, clipped to the canvas. */
312  text(x: number, y: number, s: string, fg?: string | number, bg?: string | number): void {
313    let cx = x
314    for (const ch of s) {
315      this.set(cx, y, ch, fg, bg)
316      cx++
317    }
318  }
319
320  /** Paints a cell's background only, keeping its character. */
321  paint(x: number, y: number, bg: string | number): void {
322    const cx = Math.floor(x)
323    const cy = Math.floor(y)
324    if (cx < 0 || cy < 0 || cx >= this.cols || cy >= this.rows) return
325    this.words[(cy * this.cols + cx) * 3 + 2] = typeof bg === 'number' ? bg : hexToInt(bg)
326  }
327
328  /** Two vertical pixels per cell with the upper-half block: `py` is in half-cells. */
329  pixel(x: number, py: number, color: string): void {
330    const cx = Math.floor(x)
331    const cy = Math.floor(py / 2)
332    if (cx < 0 || cy < 0 || cx >= this.cols || cy >= this.rows) return
333    const i = (cy * this.cols + cx) * 3
334    const c = hexToInt(color)
335    const isTop = Math.floor(py) % 2 === 0
336    if (this.words[i] !== 0x2580) {
337      this.words[i] = 0x2580
338      this.words[i + 1] = DEFAULT_COLOR
339      this.words[i + 2] = DEFAULT_COLOR
340    }
341    if (isTop) this.words[i + 1] = c
342    else this.words[i + 2] = c
343  }
344
345  /** The `cells` prop of a Raster. */
346  encode(): string {
347    return toBase64(new Uint8Array(this.words.buffer))
348  }
349}
350
351// ---------------------------------------------------------------------------
352// SVG for the desktop: one drawing per row (the desktop wraps siblings).
353
354export const FONT = "-apple-system,BlinkMacSystemFont,'Segoe UI',Inter,sans-serif"
355export const MONO = "ui-monospace,'Cascadia Code','SF Mono',Consolas,monospace"
356
357const XML_ESC: Record<string, string> = { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }
358
359export function xml(s: string): string {
360  return s.replace(/[&<>"']/g, c => XML_ESC[c]!)
361}
362
363/** Theme-aware classes every KOZMOS drawing shares: t text, s secondary, m muted, k track, p panel. */
364export const SVG_BASE_CSS = `
365.t{fill:#1f1f1f}.s{fill:#5f5f5c}.m{fill:#8e8e8a}.k{fill:#e7e5e0}.p{fill:#f5f4f1}.ln{stroke:#e1dfda}
366@media (prefers-color-scheme: dark){.t{fill:#ededed}.s{fill:#b4b4b0}.m{fill:#7c7c78}.k{fill:#2d2d2b}.p{fill:#232322}.ln{stroke:#363634}}
367.pulse{animation:kzp 1.6s ease-in-out infinite}@keyframes kzp{50%{opacity:.35}}
368.spin{transform-box:fill-box;transform-origin:center;animation:kzs 2s linear infinite}@keyframes kzs{to{transform:rotate(360deg)}}
369@media (prefers-reduced-motion: reduce){*{animation:none!important}}
370`
371
372export function svg(width: number, height: number, body: string, css = ''): string {
373  return `<svg xmlns="http://www.w3.org/2000/svg" width="${width}" height="${height}" viewBox="0 0 ${width} ${height}"><style>${SVG_BASE_CSS}${css}</style>${body}</svg>`
374}
375
376/** Rough width of UI text in px, for fitting labels. */
377export function textWidth(s: string, size: number): number {
378  let w = 0
379  for (const ch of s) w += (/[\s.,:;'|!il1()[\]]/.test(ch) ? 0.3 : /[A-Z@%MWmw]/.test(ch) ? 0.72 : 0.56) * size
380  return w
381}
382
383export function fitText(s: string, size: number, maxW: number): string {
384  if (textWidth(s, size) <= maxW) return s
385  let out = ''
386  for (const ch of s) {
387    if (textWidth(out + ch + '…', size) > maxW) break
388    out += ch
389  }
390  return out + '…'
391}
392
393/** A rounded progress bar as SVG markup. */
394export function svgBar(x: number, y: number, w: number, h: number, ratio: number, color: string): string {
395  const fw = Math.max(0, Math.min(w, w * clamp01(ratio)))
396  return `<rect class="k" x="${x}" y="${y}" width="${w}" height="${h}" rx="${h / 2}"/>` +
397    (fw > 0 ? `<rect x="${x}" y="${y}" width="${Math.max(h, fw)}" height="${h}" rx="${h / 2}" fill="${color}"/>` : '')
398}
399
400/** SVG text helper. */
401export function svgText(x: number, y: number, s: string, opts: { cls?: string; size?: number; weight?: number; anchor?: 'start' | 'middle' | 'end'; fill?: string; mono?: boolean } = {}): string {
402  const { cls = 't', size = 12, weight = 400, anchor = 'start', fill, mono = false } = opts
403  return `<text ${fill ? `fill="${fill}"` : `class="${cls}"`} x="${x}" y="${y}" font-family="${mono ? MONO : FONT}" font-size="${size}" font-weight="${weight}" text-anchor="${anchor}" font-variant-numeric="tabular-nums">${xml(s)}</text>`
404}
405
406/** Pixel width a desktop pane or band gives a drawing for `columns` reported columns. */
407export function pxOf(columns: number | undefined, fallback = 60, slack = 8): number {
408  return Math.max(200, Math.min(1600, (columns || fallback) * 8 - slack))
409}
410
411// ---------------------------------------------------------------------------
412// Prices, USD per million tokens: input, output, cache read, cache write (5 min).
413// Anthropic first-party rates as of 2026-10. Used only where the engine reports
414// tokens and not money (a subagent's own spend); the session total comes from
415// $.session.usage().cost, which is the engine's.
416
417const PRICES: [RegExp, [number, number, number, number]][] = [
418  [/fable|mythos/i, [10, 50, 0.25, 12.5]],
419  [/opus-5-5/i, [4, 20, 0.2, 5]],
420  [/opus/i, [5, 25, 0.5, 6.25]],
421  [/sonnet-5/i, [2, 10, 0.2, 2.5]],
422  [/sonnet/i, [3, 15, 0.3, 3.75]],
423  [/haiku-5/i, [0.1, 0.5, 0.01, 0.125]],
424  [/haiku/i, [1, 5, 0.1, 1.25]],
425]
426
427export type Usage = {
428  input_tokens?: number
429  output_tokens?: number
430  cache_read_input_tokens?: number
431  cache_creation_input_tokens?: number
432}
433
434export function priceOf(model: string): [number, number, number, number] {
435  return PRICES.find(([re]) => re.test(model))?.[1] ?? [4, 20, 0.2, 5]
436}
437
438export function costOf(model: string, u: Usage | null | undefined): number {
439  if (!u) return 0
440  const [i, o, r, w] = priceOf(model)
441  return ((u.input_tokens ?? 0) * i + (u.output_tokens ?? 0) * o + (u.cache_read_input_tokens ?? 0) * r + (u.cache_creation_input_tokens ?? 0) * w) / 1e6
442}
443
444export function tokensOf(u: Usage | null | undefined): number {
445  if (!u) return 0
446  return (u.input_tokens ?? 0) + (u.output_tokens ?? 0) + (u.cache_read_input_tokens ?? 0) + (u.cache_creation_input_tokens ?? 0)
447}
448
449/** The context a request filled: everything it read plus what it wrote. */
450export function contextOf(u: Usage | null | undefined): number {
451  return tokensOf(u)
452}
453
454export function windowOf(model: string): number {
455  return /haiku-4/i.test(model) ? 200_000 : 1_000_000
456}
457
458// ---------------------------------------------------------------------------
459// Rate limits.
460
461export type Limit = { kind: string; percentUsed: number; resetsAt?: string }
462
463export function limitLabel(kind: string): string {
464  if (kind === 'five_hour') return '5h'
465  if (kind === 'seven_day') return '7d'
466  if (kind === 'spend_limit') return '$'
467  return kind.replace(/_/g, ' ')
468}
469
470/** Milliseconds until a window resets, or undefined. */
471export function untilReset(l: Limit, now: number): number | undefined {
472  if (!l.resetsAt) return undefined
473  const t = Date.parse(l.resetsAt)
474  return Number.isFinite(t) ? Math.max(0, t - now) : undefined
475}
476
477/** The length of a window in ms, for burn-rate math. */
478export function windowMs(kind: string): number | undefined {
479  if (kind === 'five_hour') return 5 * 3600_000
480  if (kind === 'seven_day') return 7 * 24 * 3600_000
481  return undefined
482}
483
484// ---------------------------------------------------------------------------
485// Tool calls, described in a few words.
486
487/** What a tool call is about: the command, the file, the pattern, the agent's task. */
488export function toolDetail(tool: string, input: unknown): string {
489  const e = (input ?? {}) as Record<string, unknown>
490  const s = (k: string) => (typeof e[k] === 'string' ? (e[k] as string) : '')
491  const t = String(tool)
492  if (t === 'Bash' || t === 'PowerShell') return clip(s('description') || s('command'), 60)
493  if (s('file_path')) return baseName(s('file_path'))
494  if (s('notebook_path')) return baseName(s('notebook_path'))
495  if (t === 'Agent') return clip(s('description') || s('subagent_type'), 60)
496  if (s('pattern')) return clip(s('pattern'), 60)
497  if (s('url')) return clip(s('url').replace(/^https?:\/\//, ''), 60)
498  if (s('query')) return clip(s('query'), 60)
499  if (s('subject')) return clip(s('subject'), 60)
500  if (Array.isArray(e.todos)) return `${(e.todos as unknown[]).length} todos`
501  if (t.startsWith('mcp__')) return t.split('__').slice(1).join(' · ')
502  return ''
503}
504
505/** `mcp__server__tool` → `server·tool`; built-ins unchanged. */
506export function toolName(tool: string): string {
507  const t = String(tool)
508  return t.startsWith('mcp__') ? t.split('__').slice(1).join('·') : t
509}
510

1/** One tool family's count in a turn, with a representative tool name for its glyph and color. */
2export type StampChip = { family: string; tool: string; n: number }
3
4/** What one finished main-loop turn did. */
5export type StampReceipt = {
6  turnId: string
7  /** turn.complete's wall-clock length, used to find the turn's TurnDuration line. */
8  durationMs: number
9  /** When the turn ended, in $.clock.now() ms. */
10  endedAt: number
11  reason: string
12  tools: number
13  chips: StampChip[]
14  /** Fresh input: uncached input plus cache writes. */
15  inTokens?: number
16  outTokens?: number
17  cacheRead?: number
18  costUsd?: number
19  ctxPercent?: number
20  ctxDelta?: number
21}
22
23declare module 'claude-code' {
24  interface PluginState {
25    stamp: { receipts: StampReceipt[]; isOn: boolean }
26  }
27}
28