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modscode / Gallery / coding-pet

coding-pet

A pet that hatches from an egg and grows on the achievements you unlock while coding with Claude Code

Code you can checkTerminal + desktopPaneStatus lineToastBoxButtonText

What it does

  • Draws a pane, the status line, toasts
  • Adds /pet
  • Watches tool calls and can refuse them
  • Hooks prompt.submit, session.start, turn.complete, ui.close
  • Keeps its own state between turns

Good points

  • No network calls
  • Starts no processes
  • Written in TypeScript
  • Has a desktop-specific branch

Code to start from

Two kinds: a starter modscode writes from the design above, and the lines of the mod's own code that draw it.

Starter (register.tsx)

register.tsx
import type { Register } from 'claude-code'

// Drawn like coding-pet by ytskmt14 (pane, status, toast), as modscode read it from the mod's code:
// https://modscode.com/gallery/ytskmt14-coding-pet/
// Written by modscode from that reading, not copied from the mod: use it as you like.
// Each value below stands for one the mod works out at run time; put in your own.
export const register: Register = on => {
  // the pane: open it with $.ui.open({ id: 'my-pane', title: "Pet" })
  on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
    const { Box, Text, Button } = $.ui.resolve(e)
    const i = '…'
    const name = '…'
    const label = '…'
    const drawPet = '…'
    const ageDays = '…'
    const getMonth = '…'
    const getDate = '…'
    const xp = '…'
    const length = '…'
    const tail = '…'
    const tail2 = '…'
    const tail3 = '…'
    const nowLine = '…'
    const toTimeString = '…'
    const text = '…'
    const text2 = '…'
    const text3 = '…'
    const title = '…'
    const hint = '…'
    const toLocaleDateString = '…'
    const title2 = '…'
    const title3 = '…'
    const title4 = '…'
    const detail = '…'
    const title5 = '…'
    const detail2 = '…'
    const title6 = '…'
    const detail3 = '…'
    const turns = '…'
    const toolTotal = '…'
    const commits = '…'
    const costUsd = '…'
    const streakDays = '…'
    return (
      <Box flexDirection="column">
        <Text color="magenta">
          [プレビュー中] /pet preview off で戻る
        </Text>
        <Text color="red">
          [保存データを読めないため、変更を保存していません。新しいバージョンのペットで保存された可能性があります]
        </Text>
        <Box flexDirection="row" flexWrap="wrap" columnGap={1}>
          <Button hotkey={`${i}`} variant="primary" />
          <Button hotkey={`${i}`} variant="primary" />
          <Button hotkey={`${i}`} variant="primary" />
        </Box>
        <Box flexDirection="column" borderStyle="round" borderColor="yellow" paddingX={1}>
          <Box flexDirection="row" justifyContent="space-between">
            <Text bold>
              {name}
            </Text>
            <Text dimColor>
              {`？？？・${label}`}
            </Text>
          </Box>
          <Box flexDirection="column" overflow="hidden">
            <Box flexDirection="column">
              <Box flexDirection="row" gap={2}>
                <Box flexShrink={0}>
                  <Text bold color="yellow">
                    {drawPet}
                  </Text>
                </Box>
                <Box flexDirection="column">
                  <Text>
                    {`年齢   ${ageDays}日目`}
                  </Text>
                  <Text>
                    {`誕生日 ${getMonth}1/${getDate}`}
                  </Text>
                  <Text>
                    {`XP     ${xp}`}
                  </Text>
                  <Text dimColor>
                    {`実績   ${length}/${length}`}
                  </Text>
                </Box>
              </Box>
              <Text dimColor>
                ────────
              </Text>
              <Box flexDirection="row">
                <Box flexDirection="row" gap={1}>
                  <Box flexShrink={0} width={8}>
                    <Text dimColor>
                      おなか
                    </Text>
                  </Box>
                  <Box flexShrink={0}>
                    <Text color="yellow">
                      ■■■■■■■■□□□□□□□□
                    </Text>
                  </Box>
                  <Box flexShrink={1} minWidth={0}>
                    <Text dimColor wrap="truncate-end">
                      {tail}
                    </Text>
                  </Box>
                </Box>
                <Box flexDirection="row" gap={1}>
                  <Box flexShrink={0} width={8}>
                    <Text dimColor>
                      きげん
                    </Text>
                  </Box>
                  <Box flexShrink={0}>
                    <Text color="red">
                      ■■■■■■■■□□□□□□□□
                    </Text>
                  </Box>
                  <Box flexShrink={1} minWidth={0}>
                    <Text dimColor wrap="truncate-end">
                      {tail2}
                    </Text>
                  </Box>
                </Box>
              </Box>
              <Box flexDirection="row">
                <Box flexDirection="row" gap={1}>
                  <Box flexShrink={0} width={8}>
                    <Text dimColor>
                      なかよし
                    </Text>
                  </Box>
                  <Box flexShrink={0}>
                    <Text color="magenta">
                      ■■■■■■■■□□□□□□□□
                    </Text>
                  </Box>
                  <Box flexShrink={1} minWidth={0}>
                    <Text dimColor wrap="truncate-end">
                      {tail3}
                    </Text>
                  </Box>
                </Box>
                <Box flexDirection="row" gap={1}>
                  <Box flexShrink={0} width={8}>
                    <Text dimColor>
                      成長
                    </Text>
                  </Box>
                  <Box flexShrink={0}>
                    <Text color="green">
                      ■■■■■■■■□□□□□□□□
                    </Text>
                  </Box>
                  <Box flexShrink={1} minWidth={0}>
                    <Text dimColor wrap="truncate-end">
                      MAX
                    </Text>
                  </Box>
                </Box>
              </Box>
              <Box flexDirection="row" columnGap={1}>
                <Button hotkey={`${i}`}>
                  {`${label} -`}
                </Button>
                <Button hotkey={`${i}`}>
                  {`${label} -`}
                </Button>
                <Button hotkey={`${i}`}>
                  {`${label} -`}
                </Button>
              </Box>
              <Text dimColor>
                ────────
              </Text>
              <Text wrap="truncate-end">
                {`いま: ${nowLine}`}
              </Text>
              <Text dimColor>
                きょうのできごと
              </Text>
              <Text dimColor>
                {"  まだなにもない"}
              </Text>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={7}>
                  <Text dimColor>
                    {`  ${toTimeString}`}
                  </Text>
                </Box>
                <Text wrap="truncate-end">
                  {text}
                </Text>
              </Box>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={7}>
                  <Text dimColor>
                    {`  ${toTimeString}`}
                  </Text>
                </Box>
                <Text wrap="truncate-end">
                  {text2}
                </Text>
              </Box>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={7}>
                  <Text dimColor>
                    {`  ${toTimeString}`}
                  </Text>
                </Box>
                <Text wrap="truncate-end">
                  {text3}
                </Text>
              </Box>
              <Box>
                <Text>
                  {" "}
                </Text>
              </Box>
            </Box>
            <Box flexDirection="column">
              <Text bold>
                {`実績 ${length}/${length}`}
              </Text>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={2}>
                  <Text color="green">
                    ✓
                  </Text>
                </Box>
                <Box flexShrink={0} width={18}>
                  <Text wrap="truncate-end">
                    {title}
                  </Text>
                </Box>
                <Box flexShrink={0} width={7} justifyContent="flex-end">
                  <Text dimColor>
                    {`+${xp}XP`}
                  </Text>
                </Box>
                <Box flexGrow={1} flexShrink={1} minWidth={0}>
                  <Text dimColor wrap="truncate-end">
                    {`${hint}（${toLocaleDateString}）`}
                  </Text>
                </Box>
              </Box>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={2}>
                  <Text color="green">
                    ✓
                  </Text>
                </Box>
                <Box flexShrink={0} width={18}>
                  <Text wrap="truncate-end">
                    {title2}
                  </Text>
                </Box>
                <Box flexShrink={0} width={7} justifyContent="flex-end">
                  <Text dimColor>
                    {`+${xp}XP`}
                  </Text>
                </Box>
                <Box flexGrow={1} flexShrink={1} minWidth={0}>
                  <Text dimColor wrap="truncate-end">
                    {`${hint}（${toLocaleDateString}）`}
                  </Text>
                </Box>
              </Box>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={2}>
                  <Text color="green">
                    ✓
                  </Text>
                </Box>
                <Box flexShrink={0} width={18}>
                  <Text wrap="truncate-end">
                    {title3}
                  </Text>
                </Box>
                <Box flexShrink={0} width={7} justifyContent="flex-end">
                  <Text dimColor>
                    {`+${xp}XP`}
                  </Text>
                </Box>
                <Box flexGrow={1} flexShrink={1} minWidth={0}>
                  <Text dimColor wrap="truncate-end">
                    {`${hint}（${toLocaleDateString}）`}
                  </Text>
                </Box>
              </Box>
            </Box>
            <Box flexDirection="column">
              <Text bold>
                できること
              </Text>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={2}>
                  <Text color="green">
                    ✓
                  </Text>
                </Box>
                <Box flexShrink={0} width={18}>
                  <Text wrap="truncate-end">
                    {title4}
                  </Text>
                </Box>
                <Box flexGrow={1} flexShrink={1} minWidth={0}>
                  <Text dimColor wrap="truncate-end">
                    {detail}
                  </Text>
                </Box>
              </Box>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={2}>
                  <Text color="green">
                    ✓
                  </Text>
                </Box>
                <Box flexShrink={0} width={18}>
                  <Text wrap="truncate-end">
                    {title5}
                  </Text>
                </Box>
                <Box flexGrow={1} flexShrink={1} minWidth={0}>
                  <Text dimColor wrap="truncate-end">
                    {detail2}
                  </Text>
                </Box>
              </Box>
              <Box flexDirection="row" gap={1}>
                <Box flexShrink={0} width={2}>
                  <Text color="green">
                    ✓
                  </Text>
                </Box>
                <Box flexShrink={0} width={18}>
                  <Text wrap="truncate-end">
                    {title6}
                  </Text>
                </Box>
                <Box flexGrow={1} flexShrink={1} minWidth={0}>
                  <Text dimColor wrap="truncate-end">
                    {detail3}
                  </Text>
                </Box>
              </Box>
            </Box>
            <Box flexDirection="column">
              <Text bold>
                せってい
              </Text>
              <Box flexDirection="row" flexWrap="wrap" columnGap={1}>
                <Button hotkey="s">
                  効果音 ON
                </Button>
                <Button hotkey="a">
                  AIおしゃべり ON
                </Button>
              </Box>
              <Text dimColor>
                {"名前を変える: /pet name <名前>  種族を変える: /pet switch <種族>"}
              </Text>
              <Text dimColor>
                くわしくは /pet help
              </Text>
              <Box marginTop={1}>
                <Text dimColor wrap="wrap">
                  {`きろく: ${turns}ターン ・ ツール${toolTotal}回 ・ コミット${commits}回 ・ 累計$${costUsd} ・ ${streakDays}日連続`}
                </Text>
              </Box>
            </Box>
          </Box>
        </Box>
      </Box>
    )
  })

  on('session.start', async ($, e, next) => {
    const snacks = '…'
    const title = '…'
    const xp = '…'
    const label = '…'
    const name = '…'
    await $.ui.status(`🍫 うまい棒${snacks}本分（プレビュー）`)
    await $.ui.toast(`🏆 実績解除: ${title} (+${xp} XP)`)
    await $.ui.toast(`🐣 卵がかえった！ ${label}の${name}が生まれた`)
    return next(e)
  })
}

The mod's own code

Shown under the mod's licence (MIT); its text is below. Keep the notice if you copy these lines.

plugins/coding-pet/hooks/register.tsx lines 618–777 · Pane
plugins/coding-pet/hooks/register.tsx:618
  on('ui.render', { component: 'Pane', requestId: PANE }, async ($, e) => {
    const { Box, Text, Button } = $.ui.resolve(e)
    // a pane already open when the module reloaded is open too: drawing it says so
    if (!(await read($, paneOpen))) void update($, paneOpen, () => true).catch(() => {})
    const save = await shownSave($)
    if (save === null) return <Text dimColor>Loading…</Text>
    const now = await $.clock.now()
    const { pet, settings } = save
    const stage = stageIndex(pet.xp)
    const goal = nextStageXp(pet.xp)
    const from = STAGES[stage]!.xp
    const isPreview = (await read($, preview)) !== null
    const tick = await read($, frame)
    const shown = await read($, tab)
    const said = await read($, speech)
    const told = await read($, notice)
    const isUnreadable = await read($, unreadable)
    const width = Math.max(20, e.props.bodyColumns - 4)
    const rule = <Text dimColor>{'─'.repeat(width)}</Text>
    const gauge = (value: number, cells = 5) => {
      const full = Math.round((clamp(value) / 100) * cells)
      return '■'.repeat(full) + '□'.repeat(cells - full)
    }
    const growth = goal === null ? 100 : ((pet.xp - from) / (goal - from)) * 100
    const born = new Date(pet.bornAt)

    const picture =
      e.surface === 'terminal'
        ? (() => {
            const { Raster } = $.ui.resolve(e)
            return <Raster key="pet-pane" {...toCells(compose(pet.species, stageOf(pet.xp).id, moodOf(pet, now), tick))} />
          })()
        : <Text bold color="yellow">{drawPet(pet, now, tick)}</Text>

    const stat = (label: string, value: number, color: string, tail = '') => (
      <Box flexDirection="row" gap={1} width={Math.floor(width / 2)}>
        <Box flexShrink={0} width={8}>
          <Text dimColor>{label}</Text>
        </Box>
        <Box flexShrink={0}>
          <Text color={color}>{gauge(value)}</Text>
        </Box>
        {tail !== '' && (
          <Box flexShrink={1} minWidth={0}>
            <Text dimColor wrap="truncate-end">
              {tail}
            </Text>
          </Box>
        )}
      </Box>
    )
    const isEgg = stage === 0 || pet.species === null
    // the newer of the pet's words and the mod's own message; neither, how the pet seems
    const fresh = (m: { at: number } | null) => m !== null && now - m.at < SPEECH_MS
    const nowLine =
      fresh(told) && (!fresh(said) || told!.at >= said!.at)
        ? told!.text
        : fresh(said)
          ? `「${said!.text}」`
          : describe(save, now)

    const today = localDay(now)
    const diary = save.diary.filter(d => localDay(d.at) === today).slice(-DIARY_ROWS).reverse()

    const home = (
      <Box flexDirection="column">
        <Box flexDirection="row" gap={2}>
          <Box flexShrink={0}>{picture}</Box>
          <Box flexDirection="column">
            <Text>{`年齢   ${ageDays(save, now)}日目`}</Text>
            <Text>{`誕生日 ${born.getMonth() + 1}/${born.getDate()}`}</Text>
            <Text>{goal === null ? `XP     ${pet.xp}` : `XP     ${pet.xp} / ${goal}`}</Text>
            <Text dimColor>{`実績   ${Object.keys(save.unlocked).length}/${ACHIEVEMENTS.length}`}</Text>
          </Box>
        </Box>
        {rule}
        <Box flexDirection="row">
          {stat('おなか', currentFullness(pet, now), 'yellow')}
          {stat('きげん', pet.mood, 'red')}
        </Box>
        <Box flexDirection="row">
          {stat('なかよし', pet.affection, 'magenta')}
          {stat('成長', growth, 'green', goal === null ? 'MAX' : `→${STAGES[stage + 1]!.label}`)}
        </Box>
        <Box flexDirection="row" columnGap={1}>
          {(Object.keys(CARE) as CareKind[]).map((kind, i) => {
            const left = careLeft(save, kind, now)
            const isOpen = !isPreview && !(isEgg && kind !== 'pat') && left > 0
            return (
              <Button
                key={`care-${kind}`}
                hotkey={String(i + 1)}
                dimColor={!isOpen}
                onPress={() => {
                  if (isPreview) void tell($, 'プレビュー中はお世話できません（/pet preview off で戻る）').catch(() => {})
                  else void serial({ kind: 'care', care: kind }, $).catch(() => {})
                }}
              >
                {isEgg && kind !== 'pat' ? `${CARE[kind].label} -` : `${CARE[kind].label} ${left}/${CARE[kind].perDay}`}
              </Button>
            )
          })}
        </Box>
        {rule}
        <Text wrap="truncate-end">{`いま: ${nowLine}`}</Text>
        <Text dimColor>きょうのできごと</Text>
        {diary.length === 0 && <Text dimColor>{'  まだなにもない'}</Text>}
        {diary.map((d, i) => (
          <Box key={`diary-${i}`} flexDirection="row" gap={1}>
            <Box flexShrink={0} width={7}>
              <Text dimColor>{`  ${new Date(d.at).toTimeString().slice(0, 5)}`}</Text>
            </Box>
            <Text wrap="truncate-end">{d.text}</Text>
          </Box>
        ))}
        {Array.from({ length: Math.max(0, DIARY_ROWS - Math.max(1, diary.length)) }, (_, i) => (
          <Box key={`diary-pad-${i}`}>
            <Text>{' '}</Text>
          </Box>
        ))}
      </Box>
    )

    const achievements = (
      <Box flexDirection="column">
        <Text bold>{`実績 ${Object.keys(save.unlocked).length}/${ACHIEVEMENTS.length}`}</Text>
        {ACHIEVEMENTS.map(a => {
          const when = save.unlocked[a.id]
          return (
            <Box key={`ach-${a.id}`} flexDirection="row" gap={1}>
              <Box flexShrink={0} width={2}>
                <Text color={when ? 'green' : undefined} dimColor={!when}>
                  {when ? '✓' : '－'}
                </Text>
              </Box>
              <Box flexShrink={0} width={18}>
                <Text bold={!!when} dimColor={!when} wrap="truncate-end">
                  {a.title}
                </Text>
              </Box>
              <Box flexShrink={0} width={7} justifyContent="flex-end">
                <Text dimColor>{`+${a.xp}XP`}</Text>
              </Box>
              <Box flexGrow={1} flexShrink={1} minWidth={0}>
                <Text dimColor wrap="truncate-end">
                  {when ? `${a.hint}（${new Date(when).toLocaleDateString()}）` : '？？？'}
                </Text>
              </Box>
            </Box>
          )
        })}
      </Box>
    )

    const abilities = (
      <Box flexDirection="column">
        <Text bold>できること</Text>
        {ABILITIES.map(ab => {
          const isOpen = hasAbility(save, ab.id)
          const needs = STAGES.find(st => st.id === ab.stage)!
Licence text (MIT)
MIT License

Copyright (c) 2026 ytskmt14

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

What its code calls

drives Claudetool callsremembers

The design, read from code

Drawn from the mod's source at the commit read, not from a run: a list is drawn three times, a condition takes its first branch that draws in the desktop app, and a value only the run time knows is shown as a made-up sample (dotted underline) or left out. Colours and type are this site's.

What its code shows

Read from the source at commit 197f0cd33fc5 on 2026-10-06. The first group decides whether a mod is listed; the rest is for you to weigh. A later commit is not read until the next crawl.

Decides the listing: code you can check
Entry readEvery module hooks/hooks.json names was read.plugins/coding-pet/hooks/register.tsx
ParsesEvery file parses as TypeScript or JavaScript.5 files parsed
All its code is in the modEvery import is a file of the mod or the engine's own module; no packages, no require.all its code is in the mod
ReadableNo minified lines, no eval or new Function, no import of a computed path, no encoded blobs.no minified code, no eval, no encoded blobs
Calls in the openNetwork and programs are reached as $.http.fetch and $.process.run in place, never passed around.every call outside goes through $ in the open
For you to weigh before installing
Where it drawsThe terminal, the desktop app, both, or nothing (hooks only: a guard or a prompt rewriter), as its code says. Shown, never a reason to leave a mod out.draws in the terminal and the desktop app, the same in both
Install lineWhether its repository's own .claude-plugin/marketplace.json lists it, so it installs from that marketplace with the lines on its page.listed in its repository's .claude-plugin/marketplace.json: installs from there
Programs on WindowsWhether every program it starts through $.process exists on Windows (tail, date, open, osascript, /usr/… do not).runs no program a Windows PC lacks
NetworkWhether every fetch names its https host in the code.no network
ProgramsWhether every program it starts is named in the code and is not a shell, an interpreter or a network tool.starts no programs
Reads and sendsWhether it both reads files or environment variables and reaches the network.reaches no network
Keys in the sourceWhether the source holds what looks like an API key or a private key.no keys in the source
LicenceAn open licence (MIT, Apache-2.0, BSD, ISC, Unlicense, 0BSD, CC0) with its text lets modscode show its code; otherwise the code is linked.MIT

This is a reading of the code text, not a security review: it does not run the mod, and it cannot see what a program the mod starts does. The check before installing is yours. How mods are chosen

Install it

Check it yourself before you install it. Mods run unsandboxed, with your permissions, and modscode does not vouch for what this code does. Read the code below (or run claude plugin validate . in its folder), weigh what it reaches, and install the commit you read.

Its repository is its marketplace. Add that marketplace (in the terminal with these commands, or in the desktop app's plugin settings) and install the mod from it:

/plugin marketplace add ytskmt14/coding-pet
/plugin install coding-pet@coding-pet

This installs the marketplace's latest commit, which may not be the one read here (197f0cd33fc5). Compare them before you install.

Ask Claude about it

With the modscode connector added, Claude can read this design, what its code reaches and its code, and build on them. Ask it like this:

Read the modscode design "ytskmt14-coding-pet" with its code and make me a pane like it

Search them from Claude: the MCP connector

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