streak

1import type { EngineInterface, Register } from 'claude-code'
2
3const DAY = 86_400_000
4const iso = (ms: number) => new Date(ms).toISOString().slice(0, 10)
5
6// Current streak counts back from today (or yesterday, so it survives until you start today).
7export const streaks = (days: readonly string[], today: string) => {
8  const set = new Set(days)
9  const t = Date.parse(today)
10  const start = set.has(today) ? t : t - DAY
11  let current = 0
12  while (set.has(iso(start - current * DAY))) current++
13
14  let longest = 0
15  let run = 0
16  let prev = NaN
17  for (const d of [...set].sort()) {
18    const ms = Date.parse(d)
19    run = ms - prev === DAY ? run + 1 : 1
20    longest = Math.max(longest, run)
21    prev = ms
22  }
23  return { current, longest, total: set.size }
24}
25
26const localToday = (now: number) => {
27  const d = new Date(now)
28  return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`
29}
30
31const load = async ($: EngineInterface) => {
32  const ran = await $.process.run(['python3', '-I', `${$.plugin.root}/hooks/days.py`])
33  const days = ran.exitCode === 0 ? (JSON.parse(ran.stdout) as { days: string[] }).days : []
34  return streaks(days, localToday(await $.clock.now()))
35}
36
37export const register: Register = on => {
38  on('session.start', async ($, e, next) => {
39    const ran = await next(e)
40    await $.command.register({ name: 'streak', description: 'Show your Claude Code day streak' })
41    const s = await load($).catch(() => undefined)
42    // The app labels a mod's status with its name ("streak"), so the text leaves the word out.
43    if (s) $.ui.status(`🔥 ${s.current} days`)
44    return ran
45  })
46
47  on('command.run', { command: 'streak' }, async $ => {
48    const s = await load($)
49    $.ui.status(`🔥 ${s.current} days`)
50    return { text: `🔥 ${s.current}-day streak · longest ${s.longest} days · ${s.total} days with Claude in all` }
51  })
52}
53