agent-swarm

1import { atom, read, update } from 'claude-code'
2import type { EngineInterface, Register, RenderInput, Timer } from 'claude-code'
3
4import type { SwarmAgent, SwarmLogEntry, SwarmPhase, SwarmTrailItem } from '../types'
5import {
6  AUTO_CLOSE_CHOICES,
7  CORE_ROWS,
8  addUsage,
9  appendLog,
10  autoCloseMs,
11  costLabel,
12  duration,
13  fitParts,
14  head,
15  pillFrame,
16  pillText,
17  resultSummary,
18  tail,
19  usageParts,
20  usd,
21  effortCells,
22  effortColor,
23  clock,
24  coreFrame,
25  effortLabel,
26  effortLevel,
27  hex,
28  isLightTheme,
29  isLive,
30  modelFamily,
31  packCells,
32  phaseColor,
33  ramp,
34  setLightTheme,
35  shortModel,
36  sparkFrame,
37  sparkText,
38  toolArg,
39  toolGlyph,
40  trailFrame,
41  type Canvas,
42} from './core'
43import { DEMO, playDemo } from './demo'
44import { count, perfReport, record, resetPerf } from './perf'
45
46const TICK_MS = 80
47const MIN_CARD = 30
48const GAP = 1
49
50const agentsRef = { plugin: 'agent-swarm', key: 'agents' } as const
51const agentsAtom = atom(agentsRef, [])
52// Drawings subscribe to these small values, not to the list: a change of the list
53// bumps only the counters whose drawing it shows in.
54const paneRevRef = { plugin: 'agent-swarm', key: 'paneRev' } as const
55const paneRevAtom = atom(paneRevRef, 0)
56const bandRevRef = { plugin: 'agent-swarm', key: 'bandRev' } as const
57const bandRevAtom = atom(bandRevRef, 0)
58const liveRef = { plugin: 'agent-swarm', key: 'live' } as const
59const liveAtom = atom(liveRef, 0)
60/** The band shows the whole view (header, agents, inspector) rather than its squares. */
61const openAtom = atom({ plugin: 'agent-swarm', key: 'isOpen' } as const, false)
62const compactAtom = atom({ plugin: 'agent-swarm', key: 'isCompact' } as const, true)
63const selectedAtom = atom({ plugin: 'agent-swarm', key: 'selectedId' } as const, '')
64
65const BADGE: Partial<Record<SwarmPhase, string>> = {
66  spawning: 'START',
67  thinking: 'THINK',
68  writing: 'WRITE',
69  tool: 'TOOL',
70}
71const BADGE_INK = '#0f0f14'
72// Theme keys, so chrome follows Claude Code's theme.
73const COST_COLOR = 'warning'
74const BRAND = 'claude'
75const PILL_COLOR = '#b39dff'
76/** The frame the open view draws around itself: a border and a column of padding a side. */
77const FRAME = 4
78const SPARK_KEEP = 600
79/** The list is the module's own; state keeps a copy this often, so a reload picks up where it was. */
80const PERSIST_MS = 2000
81/** Timeline rows the inspector shows; older ones fold into `+N earlier`. */
82const INSPECT_ROWS = 14
83/** Animation ticks between redraws of a streaming block in the inspector. */
84const STREAM_REDRAW_TICKS = 3
85/** Ticks a redraw for a change that can wait (a step, a tool call, a sample) is held to. */
86const SOON_TICKS = 3
87/** Core Rasters blitted a tick at most; past it they take turns, so a big swarm costs what a few do. */
88const CORES_PER_TICK = 6
89/** A card's body rows: heading, core, spark, description, activity, cost, trail. */
90const CARD_ROWS = 4 + CORE_ROWS + 2
91const LINE_ROWS = 3
92const SQUARE = 20
93const SQUARE_ROWS = 5
94
95const PHASE_GLYPH: Record<SwarmPhase, string> = {
96  spawning: '◌',
97  thinking: '✻',
98  writing: '✎',
99  tool: '▸',
100  done: '✓',
101  failed: '✕',
102  stopped: '■',
103}
104
105const coreKeys = new Map<string, string>()
106const coreKey = (id: string): string => {
107  let key = coreKeys.get(id)
108  if (key === undefined) {
109    key = `core-${id.replace(/[^A-Za-z0-9_-]/g, '_')}`
110    coreKeys.set(id, key)
111  }
112
113  return key
114}
115
116/** A family name; an opaque id (a Bedrock ARN) only shows once a response names its model. */
117const modelOf = (a: SwarmAgent): string | undefined =>
118  modelFamily(a.servedModel) ??
119  modelFamily(a.model) ??
120  (a.model === '' || a.model.startsWith('arn:') ? undefined : shortModel(a.model))
121
122/** `opus@high`: the card's heading; falls back to the agent's name before its model is known. */
123const headingParts = (a: SwarmAgent): { lead: string; effort: string } => ({
124  lead: `${a.parentId ? '↳ ' : ''}${PHASE_GLYPH[a.phase]} ${modelOf(a) ?? a.name ?? a.type}`,
125  effort: modelOf(a) !== undefined && a.effort !== undefined ? `@${effortLabel(a.effort, a.effortLevel)}` : '',
126})
127
128/** What a plain Button with a hotkey takes across: `1: label`. */
129const buttonWidth = (label: string, hasHotkey: boolean) => label.length + (hasHotkey ? 3 : 0)
130
131const blank = (id: string, now: number): SwarmAgent => ({
132  id,
133  description: '',
134  type: 'agent',
135  model: '',
136  effortLevel: 0,
137  phase: 'spawning',
138  toolsRunning: 0,
139  tools: 0,
140  steps: 0,
141  trail: [],
142  startedAt: now,
143  isBackground: false,
144  isStub: true,
145})
146
147/** Live cards first (oldest first), then finished ones (latest first). */
148const ordered = (list: readonly SwarmAgent[]): SwarmAgent[] => [
149  ...list.filter(a => isLive(a.phase)).sort((a, b) => a.startedAt - b.startedAt),
150  ...list
151    .filter(a => !isLive(a.phase))
152    .sort((a, b) => (b.endedAt ?? 0) - (a.endedAt ?? 0)),
153]
154
155// Module-local: the agents (copied to state every PERSIST_MS and read back
156// after a reload), stream energy per agent, and the Rasters drawn last.
157let snapshot: readonly SwarmAgent[] = []
158let restoring: Promise<void> | undefined
159let isPersistDue = false
160let bandSig = ''
161let lastLive = -1
162let tick = 0
163let isBlitting = false
164let batchStart = 0
165const energy = new Map<string, number>()
166/** Tool calls since the last sparkline sample, per agent. */
167const toolHits = new Map<string, number>()
168/** A mounted core Raster: its size, the canvas it is drawn from and the cells it shows. */
169type Core = { columns: number; rows: number; canvas?: Canvas; cells?: string; drawn?: string }
170/** Per drawing site (the band's instance): agent id → its core Raster. */
171const mounted = new Map<string, Map<string, Core>>()
172let bandSite: string | undefined
173/** The band instance drawing the open view, while it does. */
174let fullSite: string | undefined
175const isFullShown = (): boolean => fullSite !== undefined && mounted.has(fullSite)
176/** The footer pill's site and text, while drawn. */
177let pill: { requestId: string; text: string; canvas?: Canvas; cells?: string } | undefined
178const pending = new Set<string>()
179const ignored = new Set<string>()
180/** Agents whose current turn has reported usage step by step (so turn.complete adds none). */
181const steppedUsage = new Set<string>()
182
183/** The block each agent is streaming now; it joins the log once whole. */
184type Stream = { kind: 'think' | 'text'; index: number; at: number; text: string }
185const streams = new Map<string, Stream>()
186/** Mirror of the selection, so the stream knows when its text is on screen. */
187let shownId = ''
188let isStreamDirty = false
189
190let autoCloseDelay = 0
191/** When the open view folds itself, once every agent has finished; undefined while none is due. */
192let closeAt: number | undefined
193/** The person chose to keep the view open until the next batch of agents. */
194let isHeld = false
195
196const totalCost = (list: readonly SwarmAgent[]): number | undefined =>
197  list.some(a => a.costUsd !== undefined)
198    ? list.reduce((n, a) => n + (a.costUsd ?? 0), 0)
199    : undefined
200
201async function syncLive($: EngineInterface, list: readonly SwarmAgent[]) {
202  let live = 0
203  for (const a of list) if (isLive(a.phase)) live++
204  if (live === lastLive) return
205  const wasLive = lastLive > 0
206  lastLive = live
207  count('state.write')
208  const wrote = $.state.set(liveRef, live).catch(() => undefined)
209  if (live > 0) {
210    closeAt = undefined
211    isHeld = false
212    wake($)
213  } else if (wasLive && autoCloseDelay > 0 && !isHeld && shownId === '' && isFullShown()) {
214    closeAt = (await $.clock.now()) + autoCloseDelay
215    wake($)
216  }
217  await wrote
218}
219
220// Each period of a timer is a dispatch, so they run only while there is work:
221// an agent live, a countdown due, or a held redraw. An idle session wakes for nothing.
222let frameTimer: Timer | undefined
223let secondTimer: Timer | undefined
224
225function wake($: EngineInterface) {
226  frameTimer ??= $.clock.every(TICK_MS, () => void animate($).catch(() => undefined))
227  secondTimer ??= $.clock.every(1000, () => {
228    void sample($)
229      .then(() => flushDue($, true))
230      .then(() => countdown($))
231      .then(() => {
232        if (lastLive > 0 || closeAt !== undefined || revs.pane.isDue || revs.band.isDue) return
233        secondTimer?.cancel()
234        secondTimer = undefined
235      })
236      .catch(() => undefined)
237  })
238}
239
240const FINISHED_TTL_MS = 10_000
241let expiryTimer: Timer | undefined
242let expiryAt: number | undefined
243
244/** One deadline for the whole swarm; no polling or per-agent timers. */
245async function scheduleExpiry($: EngineInterface) {
246  let next: number | undefined
247  for (const a of snapshot) {
248    if (isLive(a.phase) || a.endedAt === undefined) continue
249    const at = a.endedAt + FINISHED_TTL_MS
250    if (next === undefined || at < next) next = at
251  }
252  if (next === expiryAt) return
253  expiryTimer?.cancel()
254  expiryTimer = undefined
255  expiryAt = next
256  if (next === undefined) return
257  const now = await $.clock.now()
258  if (expiryAt !== next) return
259  expiryTimer = $.clock.after(Math.max(0, next - now), async () => {
260    expiryTimer = undefined
261    expiryAt = undefined
262    const cutoff = (await $.clock.now()) - FINISHED_TTL_MS
263    await mutate($, list => list.filter(a => {
264      if (isLive(a.phase) || a.endedAt === undefined || a.endedAt > cutoff) return true
265      energy.delete(a.id)
266      toolHits.delete(a.id)
267      streams.delete(a.id)
268      steppedUsage.delete(a.id)
269      return false
270    }))
271    const selected = await read($, selectedAtom)
272    if (selected !== '' && !snapshot.some(a => a.id === selected)) {
273      shownId = ''
274      await update($, selectedAtom, () => '')
275    }
276  })
277}
278
279/** Reads the agents back from state once, after a load; every reader and writer waits on it. */
280function restore($: EngineInterface): Promise<void> {
281  restoring ??= (async () => {
282    const [list, pane, band] = await Promise.all([read($, agentsAtom), read($, paneRevAtom), read($, bandRevAtom)])
283    // A reload ends a demo mid-way; its agents would stay live forever.
284    snapshot = list.filter(a => !(a.id.startsWith(DEMO_PREFIX) && isLive(a.phase)))
285    revs.pane.n = pane
286    revs.band.n = band
287    bandSig = bandSignature(list)
288    await scheduleExpiry($)
289  })()
290
291  return restoring
292}
293
294/**
295 * A redraw counter: bumps made while its write is in flight share one trailing
296 * write, and one that can wait is held until SOON_TICKS after the last.
297 */
298type Rev = { n: number; at: number; isDue: boolean; flight?: Promise<void>; queued?: Promise<void> }
299const revs: Record<'pane' | 'band', Rev> = {
300  pane: { n: 0, at: -Infinity, isDue: false },
301  band: { n: 0, at: -Infinity, isDue: false },
302}
303
304function bump($: EngineInterface, which: 'pane' | 'band', { soon = false } = {}): Promise<void> {
305  const rev = revs[which]
306  if (soon && tick - rev.at < SOON_TICKS) {
307    rev.isDue = true
308    wake($)
309
310    return Promise.resolve()
311  }
312  rev.at = tick
313  rev.isDue = false
314  rev.n += 1
315  if (rev.queued !== undefined) return rev.queued
316  const send = (): Promise<void> => {
317    count('state.write')
318    const wrote = which === 'pane' ? $.state.set(paneRevRef, rev.n) : $.state.set(bandRevRef, rev.n)
319    const p = wrote.then(
320      () => undefined,
321      () => undefined,
322    )
323    rev.flight = p
324    void p.then(() => {
325      if (rev.flight === p) rev.flight = undefined
326    })
327
328    return p
329  }
330  if (rev.flight === undefined) return send()
331  rev.queued = rev.flight.then(() => {
332    rev.queued = undefined
333
334    return send()
335  })
336
337  return rev.queued
338}
339
340const bandParts = new WeakMap<SwarmAgent, string>()
341
342/** Everything the band draws, so a change it does not show leaves it be. */
343function bandSignature(list: readonly SwarmAgent[]): string {
344  let sig = String(batchStart)
345  for (const a of list) {
346    let part = bandParts.get(a)
347    if (part === undefined) {
348      part = `${a.id}:${a.phase}:${a.name ?? a.type}:${a.effortLevel}:${a.phase === 'tool' ? a.tool : ''}:${costLabel(a) ?? a.tools}:${a.endedAt ?? ''}`
349      bandParts.set(a, part)
350    }
351    sig += `|${part}`
352  }
353
354  return sig
355}
356
357function refreshBand($: EngineInterface, soon = false): Promise<void> {
358  const sig = bandSignature(snapshot)
359  if (sig === bandSig) return Promise.resolve()
360  bandSig = sig
361
362  return bump($, 'band', { soon })
363}
364
365/** Sends the held redraws whose wait is over; `isLate` (the one-second timer) sends them all. */
366function flushDue($: EngineInterface, isLate = false) {
367  for (const which of ['pane', 'band'] as const) {
368    const rev = revs[which]
369    if (rev.isDue && (isLate || tick - rev.at >= SOON_TICKS)) void bump($, which)
370  }
371}
372
373function persistSoon($: EngineInterface) {
374  if (isPersistDue) return
375  isPersistDue = true
376  $.clock.after(PERSIST_MS, () => {
377    isPersistDue = false
378    count('persist')
379    $.state.set(agentsRef, [...snapshot]).catch(() => undefined)
380  })
381}
382
383/**
384 * Applies `change` to the agents and redraws what shows it. `logOf`: the change
385 * is only to that agent's timeline, which only the inspector shows. `soon`: the
386 * redraw can wait a few ticks, folding into the next.
387 */
388async function mutate(
389  $: EngineInterface,
390  change: (list: readonly SwarmAgent[]) => readonly SwarmAgent[],
391  { logOf, soon = false }: { logOf?: string; soon?: boolean } = {},
392): Promise<readonly SwarmAgent[]> {
393  await restore($)
394  snapshot = change(snapshot)
395  count('mutate')
396  persistSoon($)
397  const list = snapshot
398  const writes = [syncLive($, list), refreshBand($, soon), scheduleExpiry($)]
399  if (isFullShown() && (logOf === undefined || logOf === shownId)) writes.push(bump($, 'pane', { soon }))
400  await Promise.all(writes)
401
402  return list
403}
404
405/** Once a second while a close is due: redraw the countdown, or close when it runs out. */
406async function countdown($: EngineInterface) {
407  if (closeAt === undefined) return
408  if (!isFullShown()) {
409    closeAt = undefined
410
411    return
412  }
413  if ((await $.clock.now()) < closeAt) {
414    await bump($, 'pane')
415
416    return
417  }
418  await closeView($)
419  $.ui.toast('Agents view folded · /swarm to reopen')
420}
421
422function keepOpen($: EngineInterface) {
423  closeAt = undefined
424  isHeld = true
425  void bump($, 'pane')
426}
427
428/** A change to one agent while it works: its redraw can wait a few ticks. */
429function patch($: EngineInterface, id: string, change: (a: SwarmAgent) => SwarmAgent) {
430  return mutate($, list => list.map(a => (a.id === id ? change(a) : a)), { soon: true })
431}
432
433const log = ($: EngineInterface, id: string, entry: SwarmLogEntry) =>
434  mutate($, list => list.map(a => (a.id === id ? { ...a, log: appendLog(a.log, entry) } : a)), { logOf: id, soon: true })
435
436/** Moves the block an agent was streaming into its log. */
437async function commitStream($: EngineInterface, id: string) {
438  const s = streams.get(id)
439  if (s === undefined) return
440  streams.delete(id)
441  if (s.text.trim() !== '') await log($, id, { kind: s.kind, at: s.at, text: head(s.text, 600) })
442}
443
444/** Unfolds the band only when requested by a command or an agent selection. */
445async function openView($: EngineInterface) {
446  await update($, openAtom, () => true)
447}
448
449/** Folds the view back to the band's default squares until the person opens it again. */
450async function closeView($: EngineInterface) {
451  closeAt = undefined
452  await update($, openAtom, () => false)
453}
454
455/**
456 * Shows `id` in the inspector (pressing the shown one again hides it), and
457 * brings the inspector into view once drawn. Looking at an agent holds the view open.
458 */
459async function select($: EngineInterface, id: string, { toggle = true, open = false } = {}) {
460  shownId = await update($, selectedAtom, cur => (toggle && cur === id ? '' : id))
461  if (shownId !== '') closeAt = undefined
462  if (open) await openView($)
463  if (shownId !== '') {
464    $.clock.after(60, () => {
465      if (fullSite === undefined) return
466      void $.ui.scroll({ in: fullSite, to: { key: 'inspector' }, block: 'nearest' }).catch(() => undefined)
467    })
468  }
469}
470
471/** Whether an agent loop is one we show, adding its card when first seen. */
472async function ensure($: EngineInterface, id: string): Promise<boolean> {
473  await restore($)
474  if (snapshot.some(a => a.id === id)) return true
475  if (ignored.has(id)) return false
476  const now = await $.clock.now()
477  if (pending.size > 0) {
478    // Its spawn is still settling: hold a card the spawn will fill in.
479    await mutate($, list => (list.some(a => a.id === id) ? list : [...list, blank(id, now)]))
480
481    return true
482  }
483  const info = (await $.agent.list()).find(a => a.id === id)
484  if (info === undefined) {
485    ignored.add(id)
486
487    return false
488  }
489  await mutate($, list =>
490    list.some(a => a.id === id)
491      ? list
492      : [
493          ...list,
494          {
495            ...blank(id, now),
496            description: info.description,
497            type: info.type,
498            name: info.name,
499            parentId: info.parentId,
500            isStub: false,
501          },
502        ],
503  )
504
505  return true
506}
507
508// ── what agents do: the hooks below and the demo report through these ──
509
510type ApiUsage = Parameters<typeof addUsage>[1]
511type Card = Pick<SwarmAgent, 'description' | 'prompt' | 'type' | 'name' | 'model' | 'parentId' | 'isBackground'>
512
513async function addCard($: EngineInterface, id: string, card: Card) {
514  const now = await $.clock.now()
515  await mutate($, list => [...list.filter(a => a.id !== id), { ...blank(id, now), ...card, isStub: false }])
516}
517
518function stepStarted($: EngineInterface, id: string, effort: string | number | undefined, model: string) {
519  return patch($, id, a => ({
520    ...a,
521    phase: a.toolsRunning > 0 ? 'tool' : 'thinking',
522    effort: effort === undefined ? a.effort : String(effort),
523    effortLevel: effort === undefined ? a.effortLevel : effortLevel(effort),
524    model,
525    steps: a.steps + 1,
526    endedAt: undefined,
527  }))
528}
529
530/** One streamed chunk of a step; resolves the phase the step is in after it. */
531async function streamed(
532  $: EngineInterface,
533  id: string,
534  chunk: { kind: 'text' | 'thinking'; index: number; text: string },
535  phase: SwarmPhase,
536): Promise<SwarmPhase> {
537  energy.set(id, Math.min(1, (energy.get(id) ?? 0) + 0.06))
538  const kind = chunk.kind === 'text' ? 'text' : 'think'
539  const cur = streams.get(id)
540  if (cur === undefined || cur.kind !== kind || cur.index !== chunk.index) {
541    await commitStream($, id)
542    streams.set(id, { kind, index: chunk.index, at: await $.clock.now(), text: chunk.text })
543  } else {
544    cur.text += chunk.text
545  }
546  if (id === shownId) isStreamDirty = true
547  const now: SwarmPhase = chunk.kind === 'text' ? 'writing' : 'thinking'
548  if (now !== phase) await patch($, id, a => (a.toolsRunning > 0 ? a : { ...a, phase: now }))
549
550  return now
551}
552
553async function responded($: EngineInterface, id: string, usage: ApiUsage & { model: string }, model: string) {
554  await commitStream($, id)
555  steppedUsage.add(id)
556  await patch($, id, a => ({
557    ...a,
558    ...addUsage(a, usage, [usage.model, model]),
559    servedModel: modelFamily(usage.model) === undefined ? a.servedModel : usage.model,
560  }))
561}
562
563/** A tool call starting; resolves when it started, for `toolEnded`. */
564async function toolStarted($: EngineInterface, id: string, toolUseId: string, tool: string, arg: string | undefined) {
565  const startedAt = await $.clock.now()
566  await patch($, id, a => ({
567    ...a,
568    phase: 'tool',
569    tool,
570    toolArg: arg,
571    toolsRunning: a.toolsRunning + 1,
572    tools: a.tools + 1,
573    log: appendLog(a.log, { kind: 'tool', at: startedAt, id: toolUseId, tool, arg, status: 'run' }),
574  }))
575  toolHits.set(id, (toolHits.get(id) ?? 0) + 1)
576
577  return startedAt
578}
579
580async function toolEnded(
581  $: EngineInterface,
582  id: string,
583  toolUseId: string,
584  tool: string,
585  startedAt: number,
586  isError: boolean,
587  summary: string | undefined,
588) {
589  const ms = (await $.clock.now()) - startedAt
590  await patch($, id, a => {
591    const running = Math.max(0, a.toolsRunning - 1)
592
593    return {
594      ...a,
595      toolsRunning: running,
596      phase: a.phase === 'tool' && running === 0 ? 'thinking' : a.phase,
597      trail: [...a.trail, { tool, isError }].slice(-32),
598      log: (a.log ?? []).map(en =>
599        en.kind === 'tool' && en.id === toolUseId ? { ...en, status: isError ? 'error' : 'ok', ms, summary } : en,
600      ),
601    }
602  })
603}
604
605async function completed(
606  $: EngineInterface,
607  id: string,
608  reason: string,
609  answer: string,
610  turnUsage: (ApiUsage & { model: string }) | undefined,
611) {
612  await commitStream($, id)
613  const now = await $.clock.now()
614  const phase: SwarmPhase = reason === 'answer' ? 'done' : reason === 'aborted' ? 'stopped' : 'failed'
615  const usage = steppedUsage.has(id) ? undefined : turnUsage
616  const text = answer.trim() === '' ? undefined : head(answer, 600)
617  await patch($, id, a => ({
618    ...a,
619    ...(usage === undefined ? {} : addUsage(a, usage, [usage.model, a.model])),
620    phase,
621    toolsRunning: 0,
622    tool: undefined,
623    toolArg: undefined,
624    endedAt: now,
625    log: appendLog(a.log, { kind: 'end', at: now, phase, text }),
626  }))
627  steppedUsage.delete(id)
628  energy.delete(id)
629}
630
631// ── the demo: a scripted swarm through the same paths ──────────────────
632
633const DEMO_PREFIX = 'demo-'
634const DEMO_TICK_MS = 50
635let isDemoRunning = false
636
637/** One timer wakes every demo sleeper that is due, rather than a timer per sleep. */
638async function startDemo($: EngineInterface) {
639  isDemoRunning = true
640  let now = await $.clock.now()
641  let waits: { at: number; go: () => void }[] = []
642  const timer = $.clock.every(DEMO_TICK_MS, () => {
643    void $.clock.now().then(t => {
644      now = t
645      const due = waits.filter(w => w.at <= t)
646      waits = waits.filter(w => w.at > t)
647      for (const w of due) w.go()
648    })
649  })
650  const sleep = (ms: number) => new Promise<void>(go => waits.push({ at: now + ms, go }))
651  await openView($)
652  void playDemo(
653    {
654      spawn: (id, card) => addCard($, id, card),
655      step: (id, effort, model) => stepStarted($, id, effort, model),
656      stream: (id, chunk, phase) => streamed($, id, chunk, phase),
657      respond: (id, usage, model) => responded($, id, usage, model),
658      toolStart: (id, useId, tool, arg) => toolStarted($, id, useId, tool, arg),
659      toolEnd: (id, useId, tool, startedAt, isError, summary) => toolEnded($, id, useId, tool, startedAt, isError, summary),
660      complete: (id, reason, answer) => completed($, id, reason, answer, undefined),
661    },
662    sleep,
663    now.toString(36),
664  )
665    .catch(() => undefined)
666    .finally(() => {
667      timer.cancel()
668      isDemoRunning = false
669    })
670}
671
672/** Once a second: one sparkline sample per live agent. */
673/** Sparklines and elapsed clocks show only in the open view, so a sample redraws nothing else. */
674async function sample($: EngineInterface) {
675  await restore($)
676  if (!snapshot.some(a => isLive(a.phase))) return
677  const levels = new Map<string, number>()
678  for (const a of snapshot) {
679    if (!isLive(a.phase)) continue
680    const hits = toolHits.get(a.id) ?? 0
681    const stream = energy.get(a.id) ?? 0
682    const base = a.phase === 'spawning' ? 0 : 0.6
683    levels.set(a.id, Math.max(0, Math.min(4, Math.round(base + hits * 1.5 + stream * 3.5))))
684    toolHits.set(a.id, 0)
685  }
686  snapshot = snapshot.map(a => {
687    const level = levels.get(a.id)
688    if (level === undefined || !isLive(a.phase)) return a
689    const spark = (a.spark ?? []).slice(-(SPARK_KEEP - 1))
690    spark.push(level)
691
692    return { ...a, spark }
693  })
694  persistSoon($)
695  if (isFullShown()) await bump($, 'pane', { soon: true })
696}
697
698async function animate($: EngineInterface) {
699  if (isBlitting) return
700  const live = snapshot.filter(a => isLive(a.phase))
701  if (live.length === 0) {
702    frameTimer?.cancel()
703    frameTimer = undefined
704
705    return
706  }
707  isBlitting = true
708  const t0 = performance.now()
709  tick += 1
710  if (isStreamDirty && tick % STREAM_REDRAW_TICKS === 0 && isFullShown()) {
711    isStreamDirty = false
712    void bump($, 'pane', { soon: true })
713  }
714  flushDue($)
715  try {
716    const blits: Promise<void>[] = []
717    // The pill's spinner turns every other tick, and its sweep reads as smooth at that rate.
718    if (pill !== undefined && tick % 2 === 0) {
719      const p = pill
720      p.canvas = pillFrame(p.text, tick, p.canvas)
721      const cells = packCells(p.canvas)
722      if (cells !== p.cells) {
723        p.cells = cells
724        blits.push(
725          $.ui.blit({ requestId: p.requestId, key: 'swarm-pill', cells, columns: p.text.length + 2, rows: 1 }).then(r => {
726            if (r.deny !== undefined && pill === p) pill = undefined
727          }),
728        )
729      }
730    }
731    const turns: { site: string; cores: Map<string, Core>; a: SwarmAgent; core: Core }[] = []
732    for (const [site, cores] of mounted) {
733      for (const a of live) {
734        const core = cores.get(a.id)
735        if (core !== undefined) turns.push({ site, cores, a, core })
736      }
737    }
738    const stride = Math.ceil(turns.length / CORES_PER_TICK)
739    for (let i = 0; i < turns.length; i++) {
740      if (stride > 1 && (i + tick) % stride !== 0) continue
741      const { site, cores, a, core } = turns[i]!
742      const cells = drawCore(core, a)
743      // A frame like the one shown (a slow breath, a stalled stream) costs no blit.
744      if (cells === core.cells) {
745        count('blit.same')
746        continue
747      }
748      core.cells = cells
749      blits.push(
750        $.ui
751          .blit({ requestId: site, key: coreKey(a.id), cells, columns: core.columns, rows: core.rows })
752          .then(r => {
753            if (r.deny !== undefined) cores.delete(a.id)
754          }),
755      )
756    }
757    count('blit', blits.length)
758    record('tick', performance.now() - t0)
759    await Promise.all(blits)
760  } finally {
761    isBlitting = false
762    for (const [id, v] of energy) energy.set(id, v * 0.9)
763  }
764}
765
766/** What an agent's core shows this tick, drawn at most once a tick into its own canvas. */
767function drawCore(core: Core, a: SwarmAgent): string {
768  const key = `${tick}|${a.phase}|${a.effortLevel}|${isLightTheme()}`
769  if (core.drawn === key && core.canvas !== undefined) return packCells(core.canvas)
770  core.canvas = coreFrame(a, core.columns, tick, energy.get(a.id) ?? 0, core.rows, core.canvas)
771  core.drawn = key
772
773  return packCells(core.canvas)
774}
775
776/** Finished agents' frames, which change only with the agent: by agent object, then size and theme. */
777const stillFrames = new WeakMap<SwarmAgent, Map<string, string>>()
778const sparkFrames = new WeakMap<readonly number[], Map<string, string>>()
779
780function memo<K extends object>(cache: WeakMap<K, Map<string, string>>, on: K, key: string, draw: () => string): string {
781  let byKey = cache.get(on)
782  if (byKey === undefined) {
783    byKey = new Map()
784    cache.set(on, byKey)
785  }
786  let cells = byKey.get(key)
787  if (cells === undefined) {
788    cells = draw()
789    byKey.set(key, cells)
790  }
791
792  return cells
793}
794
795/**
796 * The cells a site's render hands an agent's core Raster: a live one keeps its
797 * canvas in `cores` for the animation, which this tick's frame reuses.
798 */
799function coreCells(prev: Map<string, Core> | undefined, cores: Map<string, Core>, a: SwarmAgent, columns: number, rows: number): string {
800  if (!isLive(a.phase)) {
801    return memo(stillFrames, a, `${columns}x${rows}|${isLightTheme()}`, () => packCells(coreFrame(a, columns, tick, 0, rows)))
802  }
803  const old = prev?.get(a.id)
804  const core: Core = old !== undefined && old.columns === columns && old.rows === rows ? old : { columns, rows }
805  cores.set(a.id, core)
806  core.cells = drawCore(core, a)
807
808  return core.cells
809}
810
811const sparkCells = (spark: readonly number[], columns: number, phase: SwarmPhase): string =>
812  memo(sparkFrames, spark, `${columns}|${phase}|${isLightTheme()}`, () => packCells(sparkFrame(spark, columns, phase)))
813
814const NO_SPARK: readonly number[] = []
815
816/**
817 * A finished agent's drawn card or line, which changes only with the agent object
818 * (every change makes a new one) or with what `key` names: size, place, selection, theme.
819 */
820const finishedViews = new WeakMap<SwarmAgent, { key: string; view: unknown }>()
821function finishedView<T>(a: SwarmAgent, key: string, draw: () => T): T {
822  if (isLive(a.phase)) return draw()
823  const hit = finishedViews.get(a)
824  if (hit !== undefined && hit.key === key) return hit.view as T
825  const view = draw()
826  finishedViews.set(a, { key, view })
827
828  return view
829}
830
831/** The inspector's settled rows (a finished tool call, a thought, the end), by entry and layout. */
832const entryViews = new WeakMap<SwarmLogEntry, { key: string; view: unknown }>()
833function entryView<T>(en: SwarmLogEntry, key: string, draw: () => T): T {
834  if (en.kind === 'tool' && en.status === 'run') return draw()
835  const hit = entryViews.get(en)
836  if (hit !== undefined && hit.key === key) return hit.view as T
837  const view = draw()
838  entryViews.set(en, { key, view })
839
840  return view
841}
842
843const trailFrames = new WeakMap<readonly SwarmTrailItem[], Map<string, string>>()
844const trailCells = (trail: readonly SwarmTrailItem[], all: readonly SwarmTrailItem[]): string =>
845  memo(trailFrames, all, String(trail.length), () => packCells(trailFrame(trail)))
846
847// ── the open view: header, every agent, the inspector, framed in the band ─
848
849async function drawFull($: EngineInterface, e: RenderInput<'AbovePrompt'>) {
850  const t0 = performance.now()
851  try {
852    const { Box, Text, Button } = $.ui.resolve(e)
853    const Raster = e.surface === 'terminal' ? $.ui.resolve(e).Raster : undefined
854    const Client = e.surface === 'terminal' ? $.ui.resolve(e).Client : undefined
855    /** A transparent region over the whole agent, last so it is on top: a click anywhere picks it. */
856    const hitArea = (a: SwarmAgent, columns: number, rows: number, inset = 1) =>
857      Client === undefined ? null : (
858        <Box position="absolute" top={-inset} left={-inset}>
859          <Client key={`hit-${coreKey(a.id)}`} module="./hit-area.tsx" props={{ id: a.id }} width={columns} height={rows} />
860        </Box>
861      )
862    const [, isCompact, selectedId, now] = await Promise.all([
863      read($, paneRevAtom),
864      read($, compactAtom),
865      read($, selectedAtom),
866      $.clock.now(),
867      restore($),
868    ])
869    const list = ordered(snapshot)
870    const selected = list.find(a => a.id === selectedId)
871    shownId = selected?.id ?? ''
872
873    const bodyColumns = Math.max(8, e.props.bodyColumns - FRAME)
874    const width = Math.max(MIN_CARD, bodyColumns)
875    const perRow = Math.max(1, Math.min(Math.floor((width + GAP) / (MIN_CARD + GAP)), list.length || 1))
876    const cardWidth = Math.floor((width - GAP * (perRow - 1)) / perRow)
877    const inner = Math.max(8, cardWidth - 4)
878
879    const live = list.filter(a => isLive(a.phase)).length
880    const done = list.filter(a => a.phase === 'done').length
881    const failed = list.filter(a => a.phase === 'failed' || a.phase === 'stopped').length
882    const tools = list.reduce((n, a) => n + a.tools, 0)
883    const cost = totalCost(list)
884    const isNarrow = bodyColumns < 64
885    const closesIn = closeAt === undefined ? undefined : Math.max(0, Math.ceil((closeAt - now) / 1000))
886
887    const prevCores = mounted.get(e.requestId)
888    const cores = new Map<string, Core>()
889    const surfaceKey = `${e.surface}|${isLightTheme()}`
890    fullSite = e.requestId
891    mounted.set(e.requestId, cores)
892
893    const heading = (a: SwarmAgent, width?: number) => {
894      const isOn = isLive(a.phase)
895      const { lead, effort } = headingParts(a)
896
897      return (
898        <Box width={width} flexShrink={1}>
899          <Text bold={isOn} dimColor={!isOn} color={phaseColor(a.phase)} wrap="truncate-end">
900            {lead}
901            {effort !== '' && <Text color={effortColor(a.effortLevel)}>{effort}</Text>}
902          </Text>
903        </Box>
904      )
905    }
906
907    const badgeOf = (a: SwarmAgent) => {
908      const badge = BADGE[a.phase]
909
910      return badge !== undefined ? (
911        <Text bold color={BADGE_INK} backgroundColor={phaseColor(a.phase)}>
912          {` ${badge} `}
913        </Text>
914      ) : (
915        <Text dimColor>{a.phase.toUpperCase()}</Text>
916      )
917    }
918
919    /** The agent's description as the control that opens it in the inspector; 1–9 press it. */
920    const picker = (a: SwarmAgent, i: number, room: number) => {
921      const hotkey = i < 9 ? String(i + 1) : undefined
922      const isShown = a.id === selected?.id
923
924      return (
925        <Button
926          key={`pick-${a.id}`}
927          label={head(a.description || a.name || a.type, Math.max(4, room - (hotkey === undefined ? 0 : 3)))}
928          hotkey={hotkey}
929          plain
930          dimColor={!isLive(a.phase) && !isShown}
931          onPress={() => void select($, a.id)}
932        />
933      )
934    }
935
936    const borderOf = (a: SwarmAgent) => {
937      const isOn = isLive(a.phase)
938      const isShown = a.id === selected?.id
939
940      return {
941        borderStyle: isShown ? 'bold' : 'round',
942        borderColor: isOn || isShown ? phaseColor(a.phase) : hex(ramp(a.phase)[2]),
943        borderDimColor: !isOn && !isShown,
944        hover: { borderColor: hex(ramp(a.phase)[4]), borderDimColor: false },
945      }
946    }
947
948    // Compact: one line per agent, headings padded to one width so the animations line up.
949    const BADGE_W = 7
950    const headW = Math.min(
951      Math.floor(width / 3),
952      Math.max(0, ...list.map(a => headingParts(a)).map(p => p.lead.length + p.effort.length)),
953    )
954    const lineCore = Math.max(4, width - headW - BADGE_W - 2)
955
956    const activityOf = (a: SwarmAgent, elapsed: number): string => {
957      switch (a.phase) {
958        case 'tool':
959          return `▸ ${a.tool ?? 'tool'}${a.toolArg ? `  ${a.toolArg}` : ''}`
960        case 'thinking':
961          return `✻ thinking · step ${a.steps}`
962        case 'writing':
963          return `✎ writing · step ${a.steps}`
964        case 'spawning':
965          return `◌ starting${a.isBackground ? ' in background' : ''}…`
966        default:
967          return `${PHASE_GLYPH[a.phase]} ${a.phase} in ${clock(elapsed)} · ${a.steps} step${a.steps === 1 ? '' : 's'}`
968      }
969    }
970
971    const line = (a: SwarmAgent, i: number) => {
972      const isOn = isLive(a.phase)
973      let core
974      if (Raster !== undefined) {
975        core = <Raster key={coreKey(a.id)} columns={lineCore} rows={1} cells={coreCells(prevCores, cores, a, lineCore, 1)} />
976      } else {
977        core = (
978          <Text color={phaseColor(a.phase)} dimColor={!isOn} wrap="truncate-end">
979            {isOn ? '· • ● • ·' : (a.description || '')}
980          </Text>
981        )
982      }
983
984      const elapsed = (a.endedAt ?? now) - a.startedAt
985      const cost = costLabel(a)
986      const stats = `${cost === undefined ? '' : `${cost} · `}⚒${a.tools} · ${clock(elapsed)}`
987      const isShown = a.id === selected?.id
988
989      return (
990        <Box key={`line-${a.id}`} flexDirection="column">
991          <Box gap={1}>
992            {heading(a, headW)}
993            <Box width={lineCore}>{core}</Box>
994            <Box width={BADGE_W} justifyContent="flex-end">
995              {badgeOf(a)}
996            </Box>
997          </Box>
998          <Box paddingLeft={1}>
999            <Text color={phaseColor(a.phase)}>{isShown ? '▸' : ' '}</Text>
1000            {picker(a, i, width - 2)}
1001          </Box>
1002          <Box justifyContent="space-between" gap={2} paddingLeft={2}>
1003            <Box flexShrink={1}>
1004              <Text color={phaseColor(a.phase)} dimColor wrap="truncate-end">
1005                {activityOf(a, elapsed)}
1006              </Text>
1007            </Box>
1008            <Box flexShrink={0}>
1009              <Text dimColor>{stats}</Text>
1010            </Box>
1011          </Box>
1012          {hitArea(a, width, LINE_ROWS, 0)}
1013        </Box>
1014      )
1015    }
1016
1017    const card = (a: SwarmAgent, i: number) => {
1018      const color = phaseColor(a.phase)
1019      const isOn = isLive(a.phase)
1020      const elapsed = (a.endedAt ?? now) - a.startedAt
1021      const stats = `⚒${a.tools} ${clock(elapsed)}`
1022      const trail = a.trail.slice(-Math.max(0, inner - stats.length - 1))
1023      const activity = { text: activityOf(a, elapsed), color }
1024
1025      let core
1026      if (Raster !== undefined) {
1027        core = <Raster key={coreKey(a.id)} columns={inner} rows={CORE_ROWS} cells={coreCells(prevCores, cores, a, inner, CORE_ROWS)} />
1028      } else {
1029        core = (
1030          <Box height={CORE_ROWS} alignItems="center" justifyContent="center">
1031            <Text color={color}>{isOn ? '· • ● • ·' : `${PHASE_GLYPH[a.phase]} ${a.phase}`}</Text>
1032          </Box>
1033        )
1034      }
1035
1036      const cost = costLabel(a)
1037      const metrics = fitParts(usageParts(a), inner - (cost === undefined ? 0 : cost.length + 3))
1038
1039      // Live: the recent sparkline. Finished: the core above charts the whole run, so a time axis.
1040      const spark = a.spark ?? NO_SPARK
1041      const hasHistory = spark.some(v => v > 0)
1042      let underCore
1043      if (!isOn && hasHistory) {
1044        const end = clock(elapsed)
1045        underCore = (
1046          <Text dimColor wrap="truncate-end">
1047            {`0:00 ${'─'.repeat(Math.max(0, inner - end.length - 6))} ${end}`}
1048          </Text>
1049        )
1050      } else if (Raster !== undefined) {
1051        underCore = (
1052          <Raster
1053            key={`spark-${coreKey(a.id)}`}
1054            columns={inner}
1055            rows={1}
1056            cells={sparkCells(spark, inner, isOn ? a.phase : 'stopped')}
1057          />
1058        )
1059      } else {
1060        underCore = (
1061          <Text color={color} dimColor={!isOn}>
1062            {sparkText(spark, inner)}
1063          </Text>
1064        )
1065      }
1066
1067      return (
1068        <Box key={`card-${a.id}`} flexDirection="column" width={cardWidth} paddingX={1} {...borderOf(a)}>
1069          <Box justifyContent="space-between" gap={1}>
1070            {heading(a)}
1071            {badgeOf(a)}
1072          </Box>
1073          {core}
1074          {underCore}
1075          {picker(a, i, inner)}
1076          <Text wrap="truncate-end" color={activity.color} dimColor={!isOn}>
1077            {activity.text}
1078          </Text>
1079          <Box>
1080            {cost === undefined ? (
1081              <Text dimColor>{metrics === '' ? '$ …' : ''}</Text>
1082            ) : (
1083              <Text bold={isOn} color={COST_COLOR} dimColor={!isOn}>
1084                {cost}
1085              </Text>
1086            )}
1087            <Text dimColor wrap="truncate-end">
1088              {metrics === '' ? '' : `${cost === undefined ? '' : ' · '}${metrics}`}
1089            </Text>
1090          </Box>
1091          <Box justifyContent="space-between">
1092            <Box>
1093              {trail.length === 0 ? (
1094                <Text dimColor>·</Text>
1095              ) : Raster !== undefined ? (
1096                <Raster key={`trail-${coreKey(a.id)}`} columns={trail.length} rows={1} cells={trailCells(trail, a.trail)} />
1097              ) : (
1098                trail.map(step => {
1099                  const g = toolGlyph(step.tool)
1100
1101                  return step.isError ? (
1102                    <Text color="#fecaca" backgroundColor="#7f1d1d">
1103                      {g.glyph}
1104                    </Text>
1105                  ) : (
1106                    <Text color={g.color}>{g.glyph}</Text>
1107                  )
1108                })
1109              )}
1110            </Box>
1111            <Text dimColor>{stats}</Text>
1112          </Box>
1113          {hitArea(a, cardWidth, CARD_ROWS + 2)}
1114        </Box>
1115      )
1116    }
1117
1118    // ── the inspector: the selected agent's task, numbers and live timeline ─
1119
1120    const inspector = (a: SwarmAgent) => {
1121      const color = phaseColor(a.phase)
1122      const isOn = isLive(a.phase)
1123      const at = list.indexOf(a)
1124      const room = width - 4
1125      const showTime = room >= 40
1126      const elapsed = (a.endedAt ?? now) - a.startedAt
1127      const cost = costLabel(a)
1128      const facts = fitParts(
1129        [
1130          `${clock(elapsed)}`,
1131          `${a.steps} step${a.steps === 1 ? '' : 's'}`,
1132          `⚒ ${a.tools}`,
1133          ...(cost === undefined ? [] : [cost]),
1134          ...usageParts(a),
1135        ],
1136        room,
1137      )
1138      const { lead, effort } = headingParts(a)
1139      const who = a.name !== undefined && a.name !== a.type ? `${a.type} · ${a.name}` : a.type
1140      const navW = buttonWidth('‹', true) + 2 + `${list.length}/${list.length}`.length + 2 + buttonWidth('›', true) + 2 + buttonWidth('hide', true)
1141      const isStacked = lead.length + effort.length + who.length + 3 + navW + 2 > room
1142
1143      const stream = isOn ? streams.get(a.id) : undefined
1144      const entries = a.log ?? []
1145      const fold = Math.max(0, entries.length + (stream === undefined ? 0 : 1) - INSPECT_ROWS)
1146      const recent = entries.slice(fold)
1147      const sideW = room < 40 ? 7 : Math.min(30, Math.floor(room / 3))
1148      const bodyW = room - (showTime ? 7 : 0) - 2
1149
1150      const when = (ms: number) =>
1151        showTime ? (
1152          <Box width={7} flexShrink={0}>
1153            <Text dimColor>{`+${clock(ms - a.startedAt)}`}</Text>
1154          </Box>
1155        ) : null
1156
1157      const entry = (en: SwarmLogEntry, i: number) => {
1158        let icon
1159        let body
1160        let side
1161        switch (en.kind) {
1162          case 'tool': {
1163            const g = toolGlyph(en.tool)
1164            icon = <Text color={g.color}>{en.status === 'run' ? '▸' : '•'}</Text>
1165            body = (
1166              <Text wrap="truncate-end">
1167                <Text bold color={g.color}>
1168                  {en.tool}
1169                </Text>
1170                {en.arg !== undefined && <Text dimColor>{`  ${en.arg}`}</Text>}
1171              </Text>
1172            )
1173            if (en.status === 'run') {
1174              side = <Text color={phaseColor('tool')}>{`◌ ${duration(now - en.at)}`}</Text>
1175            } else {
1176              const time = en.ms === undefined ? '' : duration(en.ms)
1177              const words = room < 40 ? '' : (en.summary ?? '')
1178              const rest = head([words, time].filter(Boolean).join(' · '), sideW - 2)
1179              side =
1180                en.status === 'ok' ? (
1181                  <Text>
1182                    <Text color="success">✓ </Text>
1183                    <Text dimColor>{rest}</Text>
1184                  </Text>
1185                ) : (
1186                  <Text color="error">{`✕ ${rest}`}</Text>
1187                )
1188            }
1189            break
1190          }
1191          case 'think':
1192            icon = <Text color={phaseColor('thinking')}>✻</Text>
1193            body = (
1194              <Text italic dimColor wrap="truncate-end">
1195                {en.text}
1196              </Text>
1197            )
1198            break
1199          case 'text':
1200            icon = <Text color={phaseColor('writing')}>✎</Text>

1// Pure drawing helpers for agent-swarm: palettes, effort mapping and the
2// animated "core" each card carries, packed as Raster cells.
3
4import type { SwarmAgent, SwarmLogEntry, SwarmPhase, SwarmUsage } from '../types'
5
6export const CORE_ROWS = 3
7
8const DEFAULT_BG = 0x01000000
9
10type Ramp = readonly [number, number, number, number, number]
11
12export const RAMPS: Record<SwarmPhase, Ramp> = {
13  thinking: [0x241a4d, 0x45309a, 0x7c5cff, 0xb39dff, 0xe9e1ff],
14  writing: [0x0a3442, 0x0e6e85, 0x14b3d1, 0x5fe3f7, 0xd2faff],
15  tool: [0x3a2405, 0x7a4a06, 0xd98a0b, 0xffb733, 0xffe6ad],
16  spawning: [0x1f2933, 0x334155, 0x64748b, 0x94a3b8, 0xcbd5e1],
17  done: [0x0d3b2c, 0x13684a, 0x1fa36f, 0x34d399, 0xa7f3d0],
18  failed: [0x3f1212, 0x7f1d1d, 0xdc2626, 0xf87171, 0xfecaca],
19  stopped: [0x1e293b, 0x334155, 0x64748b, 0x94a3b8, 0xcbd5e1],
20}
21
22let isLight = false
23
24/** Light themes flip every ramp, so the faint steps fade into a light background and accents read dark. */
25export function setLightTheme(theme: unknown): boolean {
26  const was = isLight
27  isLight = typeof theme === 'string' && theme.startsWith('light')
28
29  return was !== isLight
30}
31
32const LIGHT_RAMPS = Object.fromEntries(
33  Object.entries(RAMPS).map(([phase, r]) => [phase, [...r].reverse()]),
34) as unknown as Record<SwarmPhase, Ramp>
35
36export const isLightTheme = (): boolean => isLight
37
38export const ramp = (phase: SwarmPhase): Ramp => (isLight ? LIGHT_RAMPS : RAMPS)[phase]
39
40export const hex = (rgb: number): string => `#${rgb.toString(16).padStart(6, '0')}`
41
42const hexes = new Map<number, string>()
43const hexOf = (rgb: number): string => {
44  let h = hexes.get(rgb)
45  if (h === undefined) {
46    h = hex(rgb)
47    hexes.set(rgb, h)
48  }
49
50  return h
51}
52
53/** A phase's ramp step as a `#rrggbb` color, step 3 its accent. */
54export const phaseTone = (phase: SwarmPhase, step: 0 | 1 | 2 | 3 | 4): string => hexOf(ramp(phase)[step])
55
56export const phaseColor = (phase: SwarmPhase): string => phaseTone(phase, 3)
57
58export const isLive = (phase: SwarmPhase): boolean =>
59  phase !== 'done' && phase !== 'failed' && phase !== 'stopped'
60
61// ── effort ──────────────────────────────────────────────────────────────
62
63export const EFFORT_NAMES = ['—', 'low', 'medium', 'high', 'xhigh', 'max'] as const
64
65export const EFFORT_COLORS = [
66  '#64748b',
67  '#34d399',
68  '#2dd4bf',
69  '#facc15',
70  '#fb923c',
71  '#f472b6',
72] as const
73
74export function effortLevel(effort: string | number | undefined): number {
75  if (effort === undefined) return 0
76  if (typeof effort === 'number') {
77    if (effort < 4_000) return 1
78    if (effort < 16_000) return 2
79    if (effort < 32_000) return 3
80    if (effort < 64_000) return 4
81
82    return 5
83  }
84  const at = EFFORT_NAMES.indexOf(effort as (typeof EFFORT_NAMES)[number])
85
86  return at > 0 ? at : 0
87}
88
89export function effortLabel(effort: string | undefined, level: number): string {
90  if (effort === undefined) return 'default'
91  if (/^\d+$/.test(effort)) return `${Math.round(Number(effort) / 1000)}k`
92
93  return EFFORT_NAMES[level] ?? effort
94}
95
96export function effortMeter(level: number): { on: string; off: string } {
97  return { on: '▰'.repeat(level), off: '▱'.repeat(5 - level) }
98}
99
100/** btop-style: green → amber → rose across the meter, so max reads hot. */
101const EFFORT_GRADIENT_DARK = [0x34d399, 0xfacc15, 0xf43f5e] as const
102const EFFORT_GRADIENT_LIGHT = [0x059669, 0xca8a04, 0xe11d48] as const
103const effortGradient = () => (isLight ? EFFORT_GRADIENT_LIGHT : EFFORT_GRADIENT_DARK)
104
105const mix = (a: number, b: number, t: number): number => {
106  const ch = (shift: number) =>
107    Math.round(((a >> shift) & 255) + (((b >> shift) & 255) - ((a >> shift) & 255)) * t)
108
109  return (ch(16) << 16) | (ch(8) << 8) | ch(0)
110}
111
112export function gradient(stops: readonly number[], t: number): number {
113  const x = Math.max(0, Math.min(1, t)) * (stops.length - 1)
114  const i = Math.min(stops.length - 2, Math.floor(x))
115
116  return mix(stops[i] ?? 0, stops[i + 1] ?? 0, x - i)
117}
118
119type EffortCell = { ch: string; color: string; isOn: boolean }
120const effortMemo = new Map<string, readonly EffortCell[]>()
121
122/** Five meter cells: each lit one coloured by its place on the gradient. */
123export function effortCells(level: number): readonly EffortCell[] {
124  const key = `${level}${isLight ? 'l' : 'd'}`
125  let cells = effortMemo.get(key)
126  if (cells === undefined) {
127    cells = Array.from({ length: 5 }, (_, i) => ({
128      ch: i < level ? '▰' : '▱',
129      color: hex(gradient(effortGradient(), i / 4)),
130      isOn: i < level,
131    }))
132    effortMemo.set(key, cells)
133  }
134
135  return cells
136}
137
138export const effortColor = (level: number): string =>
139  level === 0 ? '#64748b' : hex(gradient(effortGradient(), (level - 1) / 4))
140
141// ── small formatting ────────────────────────────────────────────────────
142
143export function clock(ms: number): string {
144  const s = Math.max(0, Math.floor(ms / 1000))
145  const m = Math.floor(s / 60)
146  const h = Math.floor(m / 60)
147  const pad = (n: number) => String(n).padStart(2, '0')
148
149  return h > 0 ? `${h}:${pad(m % 60)}:${pad(s % 60)}` : `${m}:${pad(s % 60)}`
150}
151
152export function compact(n: number): string {
153  if (n < 1000) return String(n)
154  if (n < 1_000_000) return `${(n / 1000).toFixed(n < 10_000 ? 1 : 0)}k`
155
156  return `${(n / 1_000_000).toFixed(1)}M`
157}
158
159const FAMILIES = ['fable', 'opus', 'sonnet', 'haiku'] as const
160
161export const modelFamily = (model: string | undefined): string | undefined =>
162  FAMILIES.find(f => model?.toLowerCase().includes(f))
163
164export function shortModel(model: string): string {
165  return modelFamily(model) ?? (model.length > 12 ? model.slice(0, 12) : model)
166}
167
168// ── tokens and cost ─────────────────────────────────────────────────────
169
170/** List price in US dollars per million tokens; cache writes are 1.25× input (5-minute TTL). */
171type Price = { input: number; output: number; cacheRead: number }
172
173// First match wins, so a specific version sits above its family's fallback.
174const PRICES: readonly (readonly [RegExp, Price])[] = [
175  [/(fable|mythos)-5-1/, { input: 10, output: 50, cacheRead: 0.25 }],
176  [/fable|mythos/, { input: 10, output: 50, cacheRead: 1 }],
177  [/opus-5-5/, { input: 4, output: 20, cacheRead: 0.2 }],
178  [/opus-(5|4-[5-9])/, { input: 5, output: 25, cacheRead: 0.5 }],
179  [/opus/, { input: 15, output: 75, cacheRead: 1.5 }],
180  [/sonnet-5/, { input: 2, output: 10, cacheRead: 0.2 }],
181  [/sonnet/, { input: 3, output: 15, cacheRead: 0.3 }],
182  [/haiku-4/, { input: 1, output: 5, cacheRead: 0.1 }],
183  [/3-5-haiku|haiku-3-5/, { input: 0.8, output: 4, cacheRead: 0.08 }],
184  [/haiku/, { input: 0.25, output: 1.25, cacheRead: 0.03 }],
185]
186
187export function priceOf(model: string): Price | undefined {
188  const m = model.toLowerCase()
189
190  return PRICES.find(([re]) => re.test(m))?.[1]
191}
192
193type ApiUsage = {
194  input_tokens: number
195  output_tokens: number
196  cache_read_input_tokens: number
197  cache_creation_input_tokens: number
198}
199
200export const toUsage = (u: ApiUsage): SwarmUsage => ({
201  input: u.input_tokens,
202  output: u.output_tokens,
203  cacheRead: u.cache_read_input_tokens,
204  cacheWrite: u.cache_creation_input_tokens,
205})
206
207/** Estimated list-price dollars for `u`, or undefined when the model has no known price. */
208export function usageCost(u: SwarmUsage, model: string): number | undefined {
209  const p = priceOf(model)
210  if (p === undefined) return undefined
211
212  return (u.input * p.input + u.output * p.output + u.cacheRead * p.cacheRead + u.cacheWrite * p.input * 1.25) / 1e6
213}
214
215export const promptTokens = (u: SwarmUsage): number => u.input + u.cacheRead + u.cacheWrite
216
217/** Folds one model response into an agent's running totals. */
218export function addUsage(
219  a: SwarmAgent,
220  raw: ApiUsage,
221  models: readonly string[],
222): Pick<SwarmAgent, 'usage' | 'costUsd' | 'isCostPartial' | 'context'> {
223  const u = toUsage(raw)
224  const prev = a.usage ?? { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 }
225  const cost = models.map(m => usageCost(u, m)).find(c => c !== undefined)
226
227  return {
228    usage: {
229      input: prev.input + u.input,
230      output: prev.output + u.output,
231      cacheRead: prev.cacheRead + u.cacheRead,
232      cacheWrite: prev.cacheWrite + u.cacheWrite,
233    },
234    costUsd: cost === undefined ? a.costUsd : (a.costUsd ?? 0) + cost,
235    isCostPartial: a.isCostPartial === true || cost === undefined,
236    context: promptTokens(u) + u.output,
237  }
238}
239
240export function usd(n: number): string {
241  if (n > 0 && n < 0.01) return '<$0.01'
242  if (n < 100) return `$${n.toFixed(2)}`
243
244  return `$${Math.round(n)}`
245}
246
247/** An agent's cost as a card shows it: `+` marks a floor, undefined when nothing is priced. */
248export function costLabel(a: Pick<SwarmAgent, 'costUsd' | 'isCostPartial'>): string | undefined {
249  if (a.costUsd === undefined) return undefined
250
251  return `${usd(a.costUsd)}${a.isCostPartial === true ? '+' : ''}`
252}
253
254/** Keeps the leading parts that fit in `width`, joined by `sep`; never cuts one mid-way. */
255export function fitParts(parts: readonly string[], width: number, sep = ' · '): string {
256  let out = ''
257  for (const part of parts) {
258    const next = out === '' ? part : `${out}${sep}${part}`
259    if (next.length > width) break
260    out = next
261  }
262
263  return out
264}
265
266/** The card's metrics after the cost: context, output, cache hit rate. */
267export function usageParts(a: Pick<SwarmAgent, 'usage' | 'context' | 'costUsd'>): string[] {
268  const u = a.usage
269  if (u === undefined) return []
270  const prompt = promptTokens(u)
271  const parts: string[] = []
272  if (a.costUsd === undefined) parts.push(`${compact(prompt)} in`)
273  if (a.context !== undefined) parts.push(`ctx ${compact(a.context)}`)
274  parts.push(`${compact(u.output)} out`)
275  if (prompt > 0) parts.push(`${Math.round((u.cacheRead / prompt) * 100)}% cached`)
276
277  return parts
278}
279
280// ── auto-close ──────────────────────────────────────────────────────────
281
282export const AUTO_CLOSE_CHOICES = ['off', '10s', '30s', '1m', '5m'] as const
283
284export function autoCloseMs(value: unknown): number {
285  const m = typeof value === 'string' ? /^(\d+)(s|m)$/.exec(value) : null
286  if (m === null) return 0
287
288  return Number(m[1]) * (m[2] === 'm' ? 60_000 : 1000)
289}
290
291const TOOL_GLYPHS: Record<string, { glyph: string; color: string }> = {
292  Read: { glyph: 'R', color: '#60a5fa' },
293  Grep: { glyph: 'G', color: '#a78bfa' },
294  Glob: { glyph: 'g', color: '#a78bfa' },
295  Bash: { glyph: '$', color: '#fbbf24' },
296  Edit: { glyph: 'E', color: '#34d399' },
297  Write: { glyph: 'W', color: '#10b981' },
298  NotebookEdit: { glyph: 'N', color: '#10b981' },
299  WebFetch: { glyph: 'F', color: '#f472b6' },
300  WebSearch: { glyph: 'S', color: '#ec4899' },
301  Agent: { glyph: 'A', color: '#fb923c' },
302  Skill: { glyph: 'K', color: '#2dd4bf' },
303  TodoWrite: { glyph: 'T', color: '#94a3b8' },
304  LSP: { glyph: 'L', color: '#38bdf8' },
305}
306
307/** The tools an agent called, newest last, one colored glyph each; an error is set on red. */
308export function trailFrame(trail: readonly { tool: string; isError: boolean }[]): Canvas {
309  const c = canvas(trail.length, 1)
310  c.bg = new Uint32Array(trail.length).fill(DEFAULT_BG)
311  trail.forEach((step, x) => {
312    const g = toolGlyph(step.tool)
313    c.ch[x] = g.glyph.charCodeAt(0)
314    if (step.isError) {
315      c.fg[x] = 0xfecaca
316      c.bg![x] = 0x7f1d1d
317    } else {
318      c.fg[x] = Number.parseInt(g.color.slice(1), 16)
319    }
320  })
321
322  return c
323}
324
325export function toolGlyph(tool: string): { glyph: string; color: string } {
326  const known = TOOL_GLYPHS[tool]
327  if (known) return known
328  if (tool.startsWith('mcp__')) return { glyph: 'm', color: '#c084fc' }
329
330  return { glyph: tool.charAt(0).toUpperCase() || '?', color: '#cbd5e1' }
331}
332
333const ARG_KEYS = [
334  'command',
335  'pattern',
336  'file_path',
337  'path',
338  'url',
339  'query',
340  'skill',
341  'description',
342  'prompt',
343] as const
344
345/** A short, one-line hint of what a tool call is about. */
346export function toolArg(input: Record<string, unknown>): string | undefined {
347  for (const key of ARG_KEYS) {
348    const value = input[key]
349    if (typeof value !== 'string' || value.trim() === '') continue
350    const line = value.replace(/\s+/g, ' ').trim()
351    if (key === 'file_path' || key === 'path') {
352      return line.split('/').filter(Boolean).pop() ?? line
353    }
354
355    return line.length > 60 ? `${line.slice(0, 59)}…` : line
356  }
357
358  return undefined
359}
360
361// ── the inspector's timeline ────────────────────────────────────────────
362
363export const LOG_KEEP = 40
364const LOG_TEXT_KEEP = 600
365
366/** Whitespace folded to single spaces, the tail kept when longer than `max`. */
367export function tail(text: string, max: number = LOG_TEXT_KEEP): string {
368  const flat = text.replace(/\s+/g, ' ').trim()
369
370  return flat.length > max ? `…${flat.slice(-(max - 1))}` : flat
371}
372
373/** Whitespace folded, the head kept when longer than `max`. */
374export function head(text: string, max: number): string {
375  const flat = text.replace(/\s+/g, ' ').trim()
376
377  return flat.length > max ? `${flat.slice(0, max - 1)}…` : flat
378}
379
380/** What a tool call came back with, in a few words: its line count, or its one line. */
381export function resultSummary(text: string | undefined, isError: boolean): string | undefined {
382  const lines = (text ?? '').split('\n').filter(l => l.trim() !== '')
383  if (lines.length === 0) return undefined
384  if (!isError && lines.length > 2) return `${lines.length} lines`
385
386  return head(lines[0]!, 60)
387}
388
389export function appendLog(log: readonly SwarmLogEntry[] | undefined, entry: SwarmLogEntry): SwarmLogEntry[] {
390  return [...(log ?? []), entry].slice(-LOG_KEEP)
391}
392
393/** `0.4s`, `12s`, `1:05`: a tool call's duration. */
394export function duration(ms: number): string {
395  if (ms < 10_000) return `${(ms / 1000).toFixed(1)}s`
396  if (ms < 60_000) return `${Math.round(ms / 1000)}s`
397
398  return clock(ms)
399}
400
401// ── canvases: what every animated frame is drawn into ────────────────────
402
403/** A grid of cells as parallel arrays, reusable frame to frame: code point, color, and a background where one is set. */
404export type Canvas = { columns: number; rows: number; ch: Uint32Array; fg: Uint32Array; bg?: Uint32Array }
405
406const SPACE = 0x20
407
408export function canvas(columns: number, rows: number): Canvas {
409  const n = Math.max(0, columns * rows)
410  const c = { columns, rows, ch: new Uint32Array(n), fg: new Uint32Array(n) }
411  clear(c)
412
413  return c
414}
415
416function clear(c: Canvas): void {
417  c.ch.fill(SPACE)
418  c.fg.fill(DEFAULT_BG)
419}
420
421/** `into` when it has the size, else a new canvas; either way blank. */
422function blankCanvas(columns: number, rows: number, into?: Canvas): Canvas {
423  if (into === undefined || into.columns !== columns || into.rows !== rows) return canvas(columns, rows)
424  clear(into)
425
426  return into
427}
428
429/** One row's text, for tests and the plain-text fallbacks. */
430export function rowText(c: Canvas, y: number): string {
431  let out = ''
432  for (let x = 0; x < c.columns; x++) out += String.fromCharCode(c.ch[y * c.columns + x]!)
433
434  return out
435}
436
437export const cellAt = (c: Canvas, x: number, y: number): { ch: string; fg: number } => ({
438  ch: String.fromCharCode(c.ch[y * c.columns + x]!),
439  fg: c.fg[y * c.columns + x]!,
440})
441
442function text(c: Canvas, x: number, y: number, s: string, fg: number): void {
443  for (let i = 0; i < s.length && x + i < c.columns; i++) {
444    const k = y * c.columns + x + i
445    c.ch[k] = s.charCodeAt(i)
446    c.fg[k] = fg
447  }
448}
449
450// ── packing: RasterProps' cells are [codePoint, fg, bg] u32 LE, base64 ──
451
452const B64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
453const CELL_CACHE_MAX = 16_384
454/** A cell is 12 bytes, so 16 base64 characters of its own: each distinct cell is encoded once. */
455const encoded = new Map<number, string>()
456const word = new Uint32Array(3)
457const wordBytes = new Uint8Array(word.buffer)
458
459function encodeCell(cp: number, fg: number, bg: number = DEFAULT_BG): string {
460  word[0] = cp
461  word[1] = fg
462  word[2] = bg
463  let out = ''
464  for (let i = 0; i < 12; i += 3) {
465    const n = (wordBytes[i]! << 16) | (wordBytes[i + 1]! << 8) | wordBytes[i + 2]!
466    out += B64[n >>> 18]! + B64[(n >>> 12) & 63]! + B64[(n >>> 6) & 63]! + B64[n & 63]!
467  }
468
469  return out
470}
471
472/** Packs a canvas as RasterProps' `cells`. */
473export function packCells(c: Canvas): string {
474  if (encoded.size > CELL_CACHE_MAX) encoded.clear()
475  let out = ''
476  for (let k = 0; k < c.ch.length; k++) {
477    const cp = c.ch[k]!
478    const fg = c.fg[k]!
479    if (c.bg !== undefined && c.bg[k] !== DEFAULT_BG) {
480      out += encodeCell(cp, fg, c.bg[k])
481      continue
482    }
483    // fg holds 25 bits (the default-color flag included), so the pair fits a double exactly.
484    const key = cp * 0x2000000 + fg
485    let cell = encoded.get(key)
486    if (cell === undefined) {
487      cell = encodeCell(cp, fg)
488      encoded.set(key, cell)
489    }
490    out += cell
491  }
492
493  return out
494}
495
496// ── the footer pill: a purple shimmer over "N agents working" ────────────
497
498const SPINNER = '·✢✳✶✻✽✻✶✳✢'
499const PILL_DARK = [0x45309a, 0x7c5cff, 0xb39dff, 0xe9e1ff] as const
500const PILL_LIGHT = [0xc4b5fd, 0x7c5cff, 0x5b21b6, 0x2e1065] as const
501
502export const pillText = (live: number): string => `${live} agent${live === 1 ? '' : 's'} working`
503
504/** One row: a spinning star, then the text with a light sweeping across it. */
505export function pillFrame(label: string, t: number, into?: Canvas): Canvas {
506  const tones = isLight ? PILL_LIGHT : PILL_DARK
507  const c = blankCanvas(label.length + 2, 1, into)
508  c.ch[0] = SPINNER.charCodeAt(Math.floor(t / 2) % SPINNER.length)
509  c.fg[0] = tones[3]
510  const span = label.length + 12
511  const at = ((t * 0.6) % span) - 6
512  const sweep = tones.slice(1)
513  for (let i = 0; i < label.length; i++) {
514    const glow = Math.max(0, 1 - Math.abs(i - at) / 4)
515    c.ch[i + 2] = label.charCodeAt(i)
516    // Quantised, so a still stretch of the sweep packs from the cell cache.
517    c.fg[i + 2] = gradient(sweep, Math.round(glow * 16) / 16)
518  }
519
520  return c
521}
522
523// ── the animated core ───────────────────────────────────────────────────
524
525const BARS = '▁▂▃▄▅▆▇█'
526const BRAILLE_BITS = [
527  [0x01, 0x08],
528  [0x02, 0x10],
529  [0x04, 0x20],
530  [0x40, 0x80],
531] as const
532const ch = (s: string): number => s.charCodeAt(0)
533const SCAN = [ch('█'), ch('▓'), ch('▒'), ch('░'), ch('─')] as const
534
535const hash = (a: number, b: number, c: number): number => {
536  let h = (a * 374761393 + b * 668265263 + c * 2147483647) | 0
537  h = Math.imul(h ^ (h >>> 13), 1274126177)
538
539  return ((h ^ (h >>> 16)) >>> 0) / 4294967295
540}
541
542const rampAt = (ramp: Ramp, v: number): number =>
543  ramp[Math.max(0, Math.min(4, Math.round(v * 4)))] ?? ramp[0]
544
545const seeds = new Map<string, number>()
546
547/** A small per-agent offset, so cards side by side do not animate in lockstep. */
548function seedOf(id: string): number {
549  let seed = seeds.get(id)
550  if (seed === undefined) {
551    let n = 0
552    for (let i = 0; i < id.length; i++) n += id.charCodeAt(i)
553    seed = n % 97
554    if (seeds.size > 4096) seeds.clear()
555    seeds.set(id, seed)
556  }
557
558  return seed
559}
560
561/** Scratch rows for the plasma's separable terms, grown as needed. */
562let scratch = new Float64Array(0)
563const scratchOf = (n: number): Float64Array => {
564  if (scratch.length < n) scratch = new Float64Array(n * 2)
565
566  return scratch
567}
568
569/**
570 * The thinking plasma: three sines summed per braille dot. Each depends on one
571 * axis or one diagonal, so a frame takes a row of each instead of a sine a dot.
572 */
573function plasma(c: Canvas, seed: number, effort: number, t: number, energy: number, tones: Ramp): void {
574  const { columns: w, rows } = c
575  const speed = 0.08 + 0.06 * effort
576  const threshold = 0.74 - 0.045 * effort - 0.12 * energy
577  const cut = threshold * 6 - 3
578  const dotsX = w * 2
579  const dotsY = rows * 4
580  const buf = scratchOf(dotsX * 3 + dotsY * 2 + dotsX + dotsY)
581  // a(px) = sin(px·0.21 + t·s); the middle sine is sin(A(py) + B(px)), split by the sum rule.
582  const a = 0
583  const sinB = dotsX
584  const cosB = dotsX * 2
585  const sinA = dotsX * 3
586  const cosA = sinA + dotsY
587  const diag = cosA + dotsY
588  for (let i = 0; i < dotsX; i++) {
589    const px = i + seed
590    buf[a + i] = Math.sin(px * 0.21 + t * speed)
591    buf[sinB + i] = Math.sin(px * 0.05)
592    buf[cosB + i] = Math.cos(px * 0.05)
593  }
594  for (let py = 0; py < dotsY; py++) {
595    const angle = py * 0.85 - t * speed * 0.7
596    buf[sinA + py] = Math.sin(angle)
597    buf[cosA + py] = Math.cos(angle)
598  }
599  for (let k = 0; k < dotsX + dotsY; k++) buf[diag + k] = Math.sin((k + seed) * 0.13 + t * speed * 1.3)
600
601  for (let y = 0; y < rows; y++) {
602    for (let x = 0; x < w; x++) {
603      let bits = 0
604      let lit = 0
605      for (let dy = 0; dy < 4; dy++) {
606        const py = y * 4 + dy
607        const sA = buf[sinA + py]!
608        const cA = buf[cosA + py]!
609        for (let dx = 0; dx < 2; dx++) {
610          const i = x * 2 + dx
611          const v = buf[a + i]! + sA * buf[cosB + i]! + cA * buf[sinB + i]! + buf[diag + i + py]!
612          if (v > cut) {
613            bits |= BRAILLE_BITS[dy]![dx]!
614            lit++
615          }
616        }
617      }
618      if (bits !== 0) {
619        const k = y * w + x
620        c.ch[k] = 0x2800 + bits
621        c.fg[k] = rampAt(tones, 0.25 + lit / 10)
622      }
623    }
624  }
625}
626
627/**
628 * One frame of an agent's core: `columns` × `rows` cells, drawn into `into` when
629 * it has that size. `t` is the animation clock in ticks, `energy` 0..1 the recent stream rate.
630 */
631export function coreFrame(
632  agent: Pick<SwarmAgent, 'phase' | 'effortLevel' | 'id'> & Partial<Pick<SwarmAgent, 'spark'>>,
633  columns: number,
634  t: number,
635  energy: number,
636  rows: number = CORE_ROWS,
637  into?: Canvas,
638): Canvas {
639  const w = Math.max(1, columns)
640  const effort = agent.effortLevel || 2
641  const tones = ramp(agent.phase)
642  const seed = seedOf(agent.id)
643
644  if (!isLive(agent.phase) && rows > 1 && (agent.spark ?? []).some(v => v > 0)) {
645    const label = agent.phase === 'done' ? '✓ complete' : agent.phase === 'failed' ? '✕ failed' : 'stopped'
646
647    return historyFrame(agent.spark ?? [], w, rows, agent.phase, label, into)
648  }
649  const c = blankCanvas(w, rows, into)
650  const put = (x: number, y: number, glyph: number, fg: number) => {
651    c.ch[y * w + x] = glyph
652    c.fg[y * w + x] = fg
653  }
654
655  switch (agent.phase) {
656    case 'thinking':
657      // A braille plasma: denser and quicker the harder the agent thinks.
658      plasma(c, seed, effort, t, energy, tones)
659      break
660    case 'writing': {
661      // An equalizer: bars bounce with how fast text is streaming.
662      const speed = 0.12 + 0.05 * effort
663      const gain = 0.35 + 0.65 * Math.max(energy, 0.3)
664      for (let x = 0; x < w; x++) {
665        const wave =
666          0.5 +
667          0.5 * (0.6 * Math.sin((x + seed) * 0.55 + t * speed) + 0.4 * Math.sin(x * 0.17 - t * speed * 1.7))
668        const eighths = Math.round(wave * gain * rows * 8)
669        for (let fromBottom = 0; fromBottom < rows; fromBottom++) {
670          const fill = Math.max(0, Math.min(8, eighths - fromBottom * 8))
671          if (fill === 0) continue
672          put(x, rows - 1 - fromBottom, BARS.charCodeAt(fill - 1), rampAt(tones, 0.3 + (fromBottom + fill / 8) / (rows + 1)))
673        }
674      }
675      break
676    }
677    case 'tool': {
678      // A scanner sweeping back and forth, sparks flying off its head.
679      const speed = 0.07 + 0.045 * effort
680      const scanAt = ((Math.sin(t * speed + seed) + 1) / 2) * (w - 1)
681      const trailLen = 2 + effort
682      const mid = Math.floor(rows / 2)
683      const sparkT = Math.floor(t / 2)
684      for (let x = 0; x < w; x++) {
685        const b = Math.max(0, 1 - Math.abs(x - scanAt) / trailLen)
686        const glyph = SCAN[b > 0.8 ? 0 : b > 0.55 ? 1 : b > 0.3 ? 2 : b > 0.08 ? 3 : 4]
687        put(x, mid, glyph, b > 0.08 ? rampAt(tones, 0.3 + b * 0.7) : tones[1])
688        if (b === 0) continue
689        for (let y = 0; y < rows; y++) {
690          if (y === mid) continue
691          if (hash(x, sparkT, y + seed) < b * 0.45) put(x, y, b > 0.6 ? 0x2022 : 0xb7, rampAt(tones, 0.5 + b * 0.5))
692        }
693      }
694      break
695    }
696    case 'spawning': {
697      // A slow breath from the middle out.
698      const breath = (Math.sin(t * 0.18) + 1) / 2
699      const radius = 1 + breath * (w / 3)
700      const mid = Math.floor(rows / 2)
701      for (let x = 0; x < w; x++) {
702        const d = Math.abs(x - (w - 1) / 2)
703        if (d > radius) continue
704        const v = 1 - d / radius
705        put(x, mid, v > 0.7 ? 0x25cf : v > 0.35 ? 0x2022 : 0xb7, rampAt(tones, 0.3 + v * 0.7))
706      }
707      break
708    }
709    default: {
710      // Finished with no history: a still line with the outcome in the middle.
711      const label =
712        agent.phase === 'done' ? ' ✓ complete ' : agent.phase === 'failed' ? ' ✕ failed ' : ' stopped '
713      const mid = Math.floor(rows / 2)
714      const start = Math.max(0, Math.floor((w - label.length) / 2))
715      for (let x = 0; x < w; x++) {
716        const at = x - start
717        if (at >= 0 && at < label.length) put(x, mid, label.charCodeAt(at), tones[4])
718        else put(x, mid, 0x2501, rampAt(tones, 0.25 + 0.5 * (1 - Math.abs(x - w / 2) / (w / 2))))
719      }
720    }
721  }
722
723  return c
724}
725
726// ── a finished agent's whole run ────────────────────────────────────────
727
728const AREA_LEFT = [0x40, 0x04, 0x02, 0x01] as const
729const AREA_RIGHT = [0x80, 0x20, 0x10, 0x08] as const
730
731/** `samples` squeezed into `n` points: each bucket's mean leaning to its peak, so bursts survive. */
732export function resample(samples: readonly number[], n: number): number[] {
733  const out = Array<number>(n).fill(0)
734  if (samples.length === 0) return out
735  for (let i = 0; i < n; i++) {
736    const from = Math.floor((i * samples.length) / n)
737    const to = Math.max(from + 1, Math.floor(((i + 1) * samples.length) / n))
738    let sum = 0
739    let peak = -Infinity
740    for (let k = from; k < to; k++) {
741      const v = samples[k]!
742      sum += v
743      if (v > peak) peak = v
744    }
745    out[i] = 0.5 * (sum / (to - from)) + 0.5 * peak
746  }
747
748  return out
749}
750
751/**
752 * A filled braille area chart of the run, `rows` tall (4 dots a row), scaled to
753 * its own peak and shaded brighter towards the top; `label` sits top left.
754 */
755export function historyFrame(
756  samples: readonly number[],
757  columns: number,
758  rows: number,
759  phase: SwarmPhase,
760  label: string,
761  into?: Canvas,
762): Canvas {
763  const tones = ramp(phase)
764  const dots = rows * 4
765  const points = resample(samples, columns * 2)
766  let peak = 0.001
767  for (const v of points) if (v > peak) peak = v
768  const c = blankCanvas(columns, rows, into)
769  for (let x = 0; x < columns; x++) {
770    const hl = points[x * 2]! <= 0 ? 0 : Math.max(1, Math.round((points[x * 2]! / peak) * dots))
771    const hr = (points[x * 2 + 1] ?? 0) <= 0 ? 0 : Math.max(1, Math.round((points[x * 2 + 1]! / peak) * dots))
772    for (let y = 0; y < rows; y++) {
773      const floor = (rows - 1 - y) * 4
774      const l = Math.max(0, Math.min(4, hl - floor))
775      const r = Math.max(0, Math.min(4, hr - floor))
776      let bits = 0
777      for (let d = 0; d < l; d++) bits |= AREA_LEFT[d]!
778      for (let d = 0; d < r; d++) bits |= AREA_RIGHT[d]!
779      const k = y * columns + x
780      if (bits !== 0) {
781        c.ch[k] = 0x2800 + bits
782        c.fg[k] = rampAt(tones, 0.4 + (0.6 * (rows - y)) / rows)
783      } else if (y === rows - 1) {
784        c.ch[k] = 0x28c0
785        c.fg[k] = tones[1]
786      }
787    }
788  }
789  text(c, 0, 0, ` ${label} `, tones[4])
790
791  return c
792}
793
794// ── activity sparkline ──────────────────────────────────────────────────
795
796const SPARK_LEFT = [0x00, 0x40, 0x44, 0x46, 0x47] as const
797const SPARK_RIGHT = [0x00, 0x80, 0xa0, 0xb0, 0xb8] as const
798
799/**
800 * One row of braille, two samples (0..4) a cell, newest at the right;
801 * an empty stretch keeps a dim baseline so the track stays visible.
802 */
803export function sparkFrame(samples: readonly number[], columns: number, phase: SwarmPhase, into?: Canvas): Canvas {
804  const tones = ramp(phase)
805  const c = blankCanvas(columns, 1, into)
806  const want = columns * 2
807  const offset = samples.length - want
808  const at = (i: number) => {
809    const v = samples[offset + i]
810
811    return v === undefined ? 0 : Math.max(0, Math.min(4, Math.round(v)))
812  }
813  for (let x = 0; x < columns; x++) {
814    const l = at(x * 2)
815    const r = at(x * 2 + 1)
816    const peak = Math.max(l, r)
817    if (peak === 0) {
818      c.ch[x] = 0x28c0
819      c.fg[x] = tones[0]
820    } else {
821      c.ch[x] = 0x2800 + SPARK_LEFT[l]! + SPARK_RIGHT[r]!
822      c.fg[x] = rampAt(tones, 0.25 + peak / 5)
823    }
824  }
825
826  return c
827}
828
829export const sparkText = (samples: readonly number[], columns: number): string =>
830  rowText(sparkFrame(samples, columns, 'thinking'), 0)
831

1// `/swarm demo`: a scripted swarm shipping a multi-currency checkout, played through
2// the same reporting paths as real agents, so every phase, cost and timeline shows.
3
4import type { SwarmAgent, SwarmPhase } from '../types'
5
6type Beat =
7  | { think: string; ms: number }
8  | { say: string; ms: number }
9  | { tool: string; arg: string; ms: number; out: string; isError?: boolean }
10  /** An Agent tool call that plays the script named `spawn` as its child and waits for it. */
11  | { spawn: string }
12
13type Script = {
14  /** When it spawns, from the start of the demo; undefined for a child, which its parent spawns. */
15  at?: number
16  name: string
17  type: string
18  description: string
19  prompt: string
20  model: string
21  effort: string
22  beats: Beat[]
23  answer: string
24  answerMs: number
25}
26
27export type DemoUsage = {
28  model: string
29  input_tokens: number
30  output_tokens: number
31  cache_read_input_tokens: number
32  cache_creation_input_tokens: number
33}
34
35/** What the demo reports through: the mod's own handlers for real agents. */
36export type DemoReport = {
37  spawn: (id: string, card: Pick<SwarmAgent, 'description' | 'prompt' | 'type' | 'name' | 'model' | 'parentId' | 'isBackground'>) => Promise<void>
38  step: (id: string, effort: string, model: string) => Promise<void>
39  stream: (id: string, chunk: { kind: 'text' | 'thinking'; index: number; text: string }, phase: SwarmPhase) => Promise<SwarmPhase>
40  respond: (id: string, usage: DemoUsage, model: string) => Promise<void>
41  toolStart: (id: string, toolUseId: string, tool: string, arg: string) => Promise<number>
42  toolEnd: (id: string, toolUseId: string, tool: string, startedAt: number, isError: boolean, summary: string) => Promise<void>
43  complete: (id: string, reason: string, answer: string) => Promise<void>
44}
45
46/** Stretches every beat; 1 plays the script as written. */
47const PACE = 1.6
48const CHUNK_MS = 100
49
50const T = (ms: number, think: string): Beat => ({ think, ms })
51const S = (ms: number, say: string): Beat => ({ say, ms })
52const X = (tool: string, arg: string, ms: number, out: string, isError = false): Beat => ({ tool, arg, ms, out, isError })
53
54const OPUS = 'claude-opus-5-5'
55const SONNET = 'claude-sonnet-5-5'
56const FABLE = 'claude-fable-5-1'
57
58export const DEMO: readonly Script[] = [
59  {
60    at: 0,
61    name: 'mapper',
62    type: 'Explore',
63    description: 'map the checkout flow',
64    prompt: 'Map how a cart total is computed, end to end, and list every place money gets rounded.',
65    model: SONNET,
66    effort: 'medium',
67    beats: [
68      T(3000, 'The bug reports say totals drift by a cent. Start by finding where checkout lives and how a total is built.'),
69      X('Glob', 'src/checkout/**/*.ts', 900, '23 files'),
70      T(2600, 'cart.ts, pricing.ts, tax.ts and invoice.ts look like the pipeline. Find who calls calculateTotal to confirm the order.'),
71      X('Grep', 'calculateTotal', 1200, '9 matches in 5 files'),
72      T(2200, 'The route handler calls cart → pricing → tax → invoice in sequence. Read the cart first.'),
73      X('Read', 'src/checkout/cart.ts', 700, '174 lines'),
74      T(3200, 'Line items are floats, and each subtotal goes through toFixed(2) and back through Number(). That is one rounding already. Pricing next.'),
75      X('Read', 'src/checkout/pricing.ts', 700, '212 lines'),
76      T(2800, 'Discounts apply a percentage to the already-rounded subtotal, then round again. Two hops so far. Check tax.'),
77      X('Read', 'src/checkout/tax.ts', 700, '148 lines'),
78      T(2400, 'Tax rounds per line and again on the sum. Count every rounding site to size the fix.'),
79      X('Grep', 'toFixed\\(2\\)|Math\\.round', 1300, '14 matches in 6 files'),
80      T(2000, 'Fourteen sites in six files. Enough to report.'),
81    ],
82    answer:
83      'Checkout runs cart → pricing → tax → invoice. Amounts are floats rounded at 14 call sites in 6 files, so a total can drift a cent per hop. pricing.ts and tax.ts are the hot spots.',
84    answerMs: 2400,
85  },
86  {
87    at: 600,
88    name: 'architect',
89    type: 'Plan',
90    description: 'design the multi-currency money model',
91    prompt: 'Design how amounts, currencies and FX rates are stored so checkout works in any ISO 4217 currency. Write the plan to docs/.',
92    model: OPUS,
93    effort: 'max',
94    beats: [
95      T(5000, 'Floats are the root problem. Two options: integer minor units per currency, or a decimal library end to end. Minor units keep the database and the Stripe payloads simple, so lean that way, but check what the money helpers already do.'),
96      X('Read', 'src/lib/money.ts', 800, '64 lines'),
97      T(4200, 'money.ts multiplies by 100 everywhere. That breaks for JPY, which has no minor unit, and KWD, which has three. The exponent has to come from ISO 4217, per currency.'),
98      X('WebFetch', 'iso.org/iso-4217-currency-codes', 2400, '180 currencies with minor units'),
99      T(3600, 'Now the schema: what has to migrate, and how big are the tables?'),
100      X('Read', 'prisma/schema.prisma', 900, '318 lines'),
101      T(4400, 'Order, LineItem and Refund keep amount as Float with no currency. Plan: BigInt minor units plus a currency column, written to a shadow column first and backfilled, so the switch is reversible.'),
102      X('Bash', 'psql $STAGING_URL -c "select count(*) from orders"', 1600, '4,812,330'),
103      T(3800, 'Nearly five million orders: the backfill runs in batches, off-peak. FX rates need a home too: snapshot the rate on each order so a refund uses the rate the customer paid.'),
104      X('Read', 'src/checkout/refunds.ts', 800, '121 lines'),
105      T(4000, 'Refunds recompute from today’s rate, which is wrong for any order older than a day. That goes in the plan as step 2, before multi-currency ships.'),
106      S(1500, 'Writing the plan with the migration order.'),
107      X('Write', 'docs/multi-currency-plan.md', 1200, '96 lines'),
108      T(2600, 'The plan is written. Summarize the decisions.'),
109    ],
110    answer:
111      'Plan: store every amount as BigInt minor units with an ISO 4217 currency column; read each exponent from a table (JPY 0, USD 2, KWD 3); backfill 4.8M orders in batches through a shadow column; snapshot the FX rate on the order so refunds use it. Details in docs/multi-currency-plan.md.',
112    answerMs: 3200,
113  },
114  {
115    at: 1200,
116    name: 'tester',
117    type: 'general-purpose',
118    description: 'write failing tests for rounding drift',
119    prompt: 'Write tests that reproduce the one-cent rounding drift in USD, JPY and KWD, then get them passing.',
120    model: OPUS,
121    effort: 'xhigh',
122    beats: [
123      T(3400, 'Pin the drift with tests before anything changes: three items at 0.10 each, 8.875 percent tax, in USD, JPY and KWD.'),
124      X('Read', 'src/checkout/tax.ts', 700, '148 lines'),
125      T(2600, 'Tax takes a rate per line. Build the fixtures around one cart and assert on the invoice total.'),
126      X('Write', 'tests/rounding.test.ts', 1100, '84 lines'),
127      T(1600, 'Run them; expect failures.'),
128      X('Bash', 'bun test tests/rounding.test.ts', 2600, '3 fail · 5 pass'),
129      T(3200, 'Three fail, all in invoice.ts, where line totals are rounded and then summed. That fix is self-contained: hand it to a subagent, then cover refunds.'),
130      { spawn: 'fixer' },
131      T(2800, 'The fixer has all 8 passing. Refunds next: a partial refund of a JPY order must never produce fractional yen.'),
132      X('Write', 'tests/refund-rounding.test.ts', 1000, '52 lines'),
133      X('Bash', 'bun test', 3000, '61 pass'),
134      T(1800, 'The whole suite is green.'),
135    ],
136    answer:
137      'Added 8 rounding tests (USD, JPY, KWD) and 4 refund tests. The 3 failures were invoice.ts summing pre-rounded line totals; the fixer subagent moved rounding to the invoice total and the whole suite passes (61 tests).',
138    answerMs: 2200,
139  },
140  {
141    at: 1800,
142    name: 'payments',
143    type: 'general-purpose',
144    description: 'audit Stripe idempotency keys',
145    prompt: 'Make sure a retried payment can never double-charge, including after the customer switches currency.',
146    model: SONNET,
147    effort: 'high',
148    beats: [
149      T(3000, 'A retry after a currency switch must never double-charge. First: what exactly does Stripe replay for a repeated idempotency key?'),
150      X('WebSearch', 'stripe idempotency key retry different amount', 1800, '10 results'),
151      T(2000, 'The API reference has the precise rules.'),
152      X('WebFetch', 'docs.stripe.com/api/idempotent_requests', 1900, 'keys kept 24h, replayed verbatim'),
153      T(3000, 'Stripe replays the first response for 24 hours, whatever the new body says, so the key must change when the amount or currency does. Find how keys are built.'),
154      X('Grep', 'idempotencyKey', 900, '4 matches in 2 files'),
155      X('Read', 'src/payments/stripe.ts', 800, '276 lines'),
156      T(3400, 'The key is the cart id alone: a customer who switches currency and retries gets the old charge replayed. Prove it in the sandbox.'),
157      X('Bash', 'bun run scripts/replay-check.ts', 2200, 'error: STRIPE_API_KEY is not set', true),
158      T(1800, 'The sandbox key lives in .env.test.'),
159      X('Bash', 'dotenv -e .env.test -- bun run scripts/replay-check.ts', 2600, 'replayed 12.99 USD (sent 1950 JPY)'),
160      T(2600, 'Reproduced. Build the key from the cart id, the currency and the amount in minor units.'),
161      X('Edit', 'src/payments/stripe.ts', 800, '+6 −2'),
162      X('Bash', 'dotenv -e .env.test -- bun run scripts/replay-check.ts', 2400, 'new charge: 1950 JPY'),
163      T(1400, 'Fixed and verified.'),
164    ],
165    answer:
166      'Found a replay bug: idempotency keys were built from the cart id alone, so a retry after a currency switch replayed the old charge (reproduced in the sandbox). Keys now include the currency and the amount in minor units (src/payments/stripe.ts).',
167    answerMs: 2200,
168  },
169  {
170    at: 2400,
171    name: 'reviewer',
172    type: 'general-purpose',
173    description: 'review PR #482 for race conditions',
174    prompt: 'Review PR #482 (async FX rate refresh) for race conditions and post a review.',
175    model: FABLE,
176    effort: 'high',
177    beats: [
178      T(3200, 'PR 482 adds an async exchange-rate refresh. Pull the diff and look for unguarded writes to shared state.'),
179      X('Bash', 'gh pr diff 482', 1600, '+418 −97 · 12 files'),
180      T(3000, 'Most of the diff is the new FX client. The cache in src/fx/rates.ts is the shared state; read it whole.'),
181      X('Read', 'src/fx/rates.ts', 700, '133 lines'),
182      T(4200, 'refreshRates() awaits the provider, then writes rateCache. Nothing orders two refreshes in flight: if the slower one started first, it lands last and overwrites the fresher rate.'),
183      X('LSP', 'references refreshRates', 1000, '7 references'),
184      T(2600, 'Two callers matter: the scheduler and the admin "refresh now" button. Can they overlap?'),
185      X('Read', 'src/fx/scheduler.ts', 700, '88 lines'),
186      T(3400, 'Yes: the scheduler fires every 60 s regardless of a manual refresh. A version stamp per write fixes it without a lock. Is there a test?'),
187      X('Grep', 'refreshRates tests/', 900, '2 matches, none concurrent'),
188      T(2400, 'Nothing covers concurrency. Suggest a test in the review.'),
189      S(1800, 'Posting the review with the race, a fix and a test sketch.'),
190      X('Bash', 'gh pr review 482 --comment -F review.md', 1500, 'review posted'),
191      T(1200, 'Done.'),
192    ],
193    answer:
194      'PR #482 has a race: two refreshRates() calls can interleave and an older FX response overwrite a newer one (src/fx/rates.ts:58). Suggested a monotonic version stamp per cache write plus a concurrency test; review posted.',
195    answerMs: 2400,
196  },
197  {
198    name: 'fixer',
199    type: 'general-purpose',
200    description: 'fix rounding in invoice.ts',
201    prompt: 'Make the 3 failing tests in tests/rounding.test.ts pass by fixing invoice.ts.',
202    model: SONNET,
203    effort: 'high',
204    beats: [
205      T(2800, 'invoice.ts rounds each line with toFixed(2), then sums the strings back into numbers. Read it to be sure.'),
206      X('Read', 'src/checkout/invoice.ts', 700, '190 lines'),
207      T(3000, 'Confirmed. Sum in minor units first and round once, at the total.'),
208      X('Edit', 'src/checkout/invoice.ts', 900, '+12 −9'),
209      T(1400, 'Run the rounding tests.'),
210      X('Bash', 'bun test tests/rounding.test.ts', 2400, '1 fail · 7 pass'),
211      T(3200, 'KWD is still off by a factor of ten: the exponent is hardcoded as 2. Read it from the currency table instead.'),
212      X('Edit', 'src/checkout/invoice.ts', 800, '+4 −2'),
213      X('Bash', 'bun test tests/rounding.test.ts', 2200, '8 pass'),
214      T(1200, 'All green.'),
215    ],
216    answer:
217      'Fixed invoice.ts: line totals are summed in minor units and rounded once, with the exponent from the currency table (KWD was hardcoded to 2). All 8 rounding tests pass.',
218    answerMs: 1800,
219  },
220]
221
222/** A response's token counts: the context grows a few thousand tokens a step. */
223const usageOf = (model: string, step: number, outChars: number): DemoUsage => ({
224  model,
225  input_tokens: 300 + 40 * step,
226  output_tokens: Math.round(outChars * 1.6) + 120,
227  cache_read_input_tokens: 9_000 + 5_200 * step,
228  cache_creation_input_tokens: 2_400 + 300 * step,
229})
230
231/** Plays the whole demo; `sleep` waits on the mod's own timer, `nonce` keeps ids unique per run. */
232export async function playDemo(report: DemoReport, sleep: (ms: number) => Promise<void>, nonce: string): Promise<void> {
233  const wait = (ms: number) => sleep(ms * PACE)
234  let uses = 0
235
236  const play = async (s: Script, parentId?: string): Promise<void> => {
237    const id = `demo-${nonce}-${s.name}`
238    await report.spawn(id, {
239      description: s.description,
240      prompt: s.prompt,
241      type: s.type,
242      name: s.name,
243      model: s.model,
244      parentId,
245      isBackground: false,
246    })
247    await wait(700)
248
249    let step = 0
250    let block = 0
251    let isStepOpen = false
252    let phase: SwarmPhase = 'thinking'
253    let outChars = 0
254    const open = async () => {
255      if (isStepOpen) return
256      isStepOpen = true
257      step += 1
258      outChars = 0
259      phase = 'thinking'
260      await report.step(id, s.effort, s.model)
261    }
262    const close = async () => {
263      if (!isStepOpen) return
264      isStepOpen = false
265      await report.respond(id, usageOf(s.model, step, outChars), s.model)
266    }
267    const stream = async (kind: 'text' | 'thinking', text: string, ms: number) => {
268      await open()
269      block += 1
270      const words = text.split(' ')
271      const chunks = Math.min(words.length, Math.max(1, Math.round((ms * PACE) / CHUNK_MS)))
272      const per = Math.ceil(words.length / chunks)
273      const gap = (ms * PACE) / Math.ceil(words.length / per)
274      for (let i = 0; i < words.length; i += per) {
275        await sleep(gap)
276        const piece = words.slice(i, i + per).join(' ') + (i + per < words.length ? ' ' : '')
277        outChars += piece.length
278        phase = await report.stream(id, { kind, index: block, text: piece }, phase)
279      }
280    }
281    const tool = async (name: string, arg: string, run: () => Promise<{ isError: boolean; out: string }>) => {
282      await open()
283      await close()
284      uses += 1
285      const useId = `demo-${nonce}-tu${uses}`
286      const startedAt = await report.toolStart(id, useId, name, arg)
287      const { isError, out } = await run()
288      await report.toolEnd(id, useId, name, startedAt, isError, out)
289    }
290
291    for (const beat of s.beats) {
292      if ('think' in beat) await stream('thinking', beat.think, beat.ms)
293      else if ('say' in beat) await stream('text', beat.say, beat.ms)
294      else if ('tool' in beat) {
295        await tool(beat.tool, beat.arg, async () => {
296          await wait(beat.ms)
297
298          return { isError: beat.isError === true, out: beat.out }
299        })
300      } else {
301        const child = DEMO.find(c => c.name === beat.spawn)!
302        await tool('Agent', child.description, async () => {
303          await play(child, id)
304
305          return { isError: false, out: 'done' }
306        })
307      }
308    }
309    await stream('text', s.answer, s.answerMs)
310    await close()
311    await report.complete(id, 'answer', s.answer)
312  }
313
314  await Promise.all(
315    DEMO.map(async s => {
316      if (s.at === undefined) return
317      await wait(s.at)
318
319      return play(s)
320    }),
321  )
322}
323

1// Cheap always-on counters for agent-swarm's own cost: `/swarm perf` reports them.
2
3type Timing = { n: number; total: number; max: number }
4
5const counts = new Map<string, number>()
6const timings = new Map<string, Timing>()
7let since = performance.now()
8
9export function count(name: string, by = 1): void {
10  counts.set(name, (counts.get(name) ?? 0) + by)
11}
12
13export function record(name: string, ms: number): void {
14  const t = timings.get(name)
15  if (t === undefined) {
16    timings.set(name, { n: 1, total: ms, max: ms })
17  } else {
18    t.n += 1
19    t.total += ms
20    if (ms > t.max) t.max = ms
21  }
22}
23
24export function resetPerf(): void {
25  counts.clear()
26  timings.clear()
27  since = performance.now()
28}
29
30export type PerfSnapshot = {
31  seconds: number
32  counts: Record<string, number>
33  timings: Record<string, Timing>
34}
35
36export function perfSnapshot(): PerfSnapshot {
37  return {
38    seconds: (performance.now() - since) / 1000,
39    counts: Object.fromEntries(counts),
40    timings: Object.fromEntries([...timings].map(([k, t]) => [k, { ...t }])),
41  }
42}
43
44export function perfReport(): string {
45  const s = perfSnapshot()
46  const secs = Math.max(0.001, s.seconds)
47  const lines = [`agent-swarm perf over ${s.seconds.toFixed(1)}s`]
48  for (const [name, t] of Object.entries(s.timings).sort()) {
49    lines.push(
50      `  ${name.padEnd(16)} ${String(t.n).padStart(6)}× ${(t.n / secs).toFixed(1).padStart(6)}/s  avg ${(t.total / t.n).toFixed(3)}ms  max ${t.max.toFixed(2)}ms  total ${t.total.toFixed(1)}ms`,
51    )
52  }
53  for (const [name, n] of Object.entries(s.counts).sort()) {
54    lines.push(`  ${name.padEnd(16)} ${String(n).padStart(6)}  ${(n / secs).toFixed(1).padStart(6)}/s`)
55  }
56
57  return lines.join('\n')
58}
59

1import type { ClientModule } from 'claude-code'
2
3/** An empty region laid over a card: draws nothing, so the card shows through, and posts a click. */
4const HitArea: ClientModule<{ id: string }> = (props, surface) => {
5  surface.onPointer(e => {
6    if (e.type === 'down' && e.button === 'left') surface.post({ pick: props.id })
7  })
8  const { Box } = surface.elements
9
10  return <Box width={surface.columns} height={surface.rows} />
11}
12
13export default HitArea
14

1export type SwarmPhase =
2  | 'spawning'
3  | 'thinking'
4  | 'writing'
5  | 'tool'
6  | 'done'
7  | 'failed'
8  | 'stopped'
9
10export type SwarmTrailItem = { tool: string; isError: boolean }
11
12/** One row of an agent's activity timeline, as the inspector draws it. */
13export type SwarmLogEntry =
14  | { kind: 'think' | 'text'; at: number; text: string }
15  | {
16      kind: 'tool'
17      at: number
18      id: string
19      tool: string
20      arg?: string
21      status: 'run' | 'ok' | 'error'
22      ms?: number
23      summary?: string
24    }
25  | { kind: 'end'; at: number; phase: SwarmPhase; text?: string }
26
27/** Token counts summed over an agent's model responses. */
28export type SwarmUsage = {
29  input: number
30  output: number
31  cacheRead: number
32  cacheWrite: number
33}
34
35export type SwarmAgent = {
36  id: string
37  description: string
38  /** The task the agent was given, cut to a few hundred characters. */
39  prompt?: string
40  /** Its latest activity, oldest first, capped. */
41  log?: SwarmLogEntry[]
42  type: string
43  name?: string
44  model: string
45  /** The model id a response reported, when it names a family the configured id (e.g. a Bedrock ARN) does not. */
46  servedModel?: string
47  effort?: string
48  /** 0 unknown, 1 low … 5 max */
49  effortLevel: number
50  phase: SwarmPhase
51  tool?: string
52  toolArg?: string
53  toolsRunning: number
54  tools: number
55  steps: number
56  trail: SwarmTrailItem[]
57  /** Activity per second, 0..4, newest last: tool calls plus stream rate. */
58  spark?: number[]
59  startedAt: number
60  endedAt?: number
61  usage?: SwarmUsage
62  /** Estimated US dollars at list price, summed over the priced responses. */
63  costUsd?: number
64  /** Some response's model had no known price, so `costUsd` is a floor. */
65  isCostPartial?: boolean
66  /** Tokens in the context after the latest response: its prompt plus output. */
67  context?: number
68  parentId?: string
69  isBackground: boolean
70  isStub: boolean
71}
72
73declare module 'claude-code' {
74  interface PluginState {
75    'agent-swarm': {
76      agents: SwarmAgent[]
77      isCompact: boolean
78      /** The band shows the whole view rather than its squares. */
79      isOpen: boolean
80      /** The agent the inspector shows; empty for none. */
81      selectedId: string
82      /** Redraw counters: bumped when what the pane, or the band, shows has changed. */
83      paneRev: number
84      bandRev: number
85      /** How many agents are running; the footer pill draws from it alone. */
86      live: number
87    }
88  }
89}
90