buddy by bllshttng: Claude Code mod code

What it does

Draws a pane, a band above the prompt
Hooks config.set, prompt.edit, session.start, turn.complete
Keeps its own state between turns
Starts processes

Good points

No network calls
Written in TypeScript
Has a desktop-specific branch
Handles errors

Code to start from

A starter ModsCode writes from the drawing it read, and the mod's own lines that draw, where there are any.

Starter (register.tsx)

import type { Register } from 'claude-code'

// Drawn like buddy by Jason Noah Choi (pane, band), as ModsCode read it from the mod's code:
// https://modscode.com/claude-mods/mods/bllshttng-buddy/
// 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 $.ui.open({ id: 'my-pane', title: "‹name›" })
  on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
    const { Box, Text } = $.ui.resolve(e)
    const RARITY_STARS = '…'
    const rarity = '…'
    const species = '…'
    const line = '…'
    const line2 = '…'
    const line3 = '…'
    const name = '…'
    const personality = '…'
    const said = '…'
    const bank = '…'
    return (
      <Box flexDirection="column">
        <Box flexDirection="column" borderStyle="round" paddingX={2} paddingY={1} width={40} flexShrink={0}>
          <Box justifyContent="space-between">
            <Text bold>
              {`${RARITY_STARS} ${rarity}`}
            </Text>
            <Text>
              {species}
            </Text>
          </Box>
          <Text color="warning" bold>
            ✨ SHINY ✨
          </Text>
          <Box flexDirection="column" marginY={1}>
            <Text>
              {line}
            </Text>
            <Text>
              {line2}
            </Text>
            <Text>
              {line3}
            </Text>
          </Box>
          <Text bold>
            {name}
          </Text>
          <Box marginY={1}>
            <Text dimColor italic>
              {`"${personality}"`}
            </Text>
          </Box>
          <Box flexDirection="column" />
          <Box flexDirection="column" marginTop={1}>
            <Text dimColor>
              last said
            </Text>
            <Box borderStyle="round" borderColor="inactive" paddingX={1}>
              <Text dimColor italic>
                {said}
              </Text>
            </Box>
          </Box>
          <Box marginTop={1}>
            <Text dimColor>
              {`rerolls ${bank}/3`}
            </Text>
          </Box>
        </Box>
        <Box flexDirection="column" marginTop={1}>
          <Text dimColor>
            {`${name} is here · it'll chime in as you code`}
          </Text>
          <Text dimColor>
            each line is one small model call on your plan
          </Text>
          <Text dimColor>
            say its name to get its take · /buddy pet · /buddy off
          </Text>
          <Box marginTop={1} />
        </Box>
      </Box>
    )
  })

  // the band above the prompt; what else goes there is drawn under it
  on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
    const { Box, Text } = $.ui.resolve(e)
    const words = '…'
    const line = '…'
    const line2 = '…'
    const line3 = '…'
    const name = '…'
    return (
      <Box flexDirection="column">
        <Box flexDirection="row" justifyContent="flex-end" alignItems="flex-end">
          <Box borderStyle="round" width={34}>
            <Text wrap="wrap">
              {words}
            </Text>
          </Box>
          <Text>
            {" ◦ · "}
          </Text>
          <Box flexDirection="column" alignItems="center">
            <Text>
              {line}
            </Text>
            <Text>
              {line2}
            </Text>
            <Text>
              {line3}
            </Text>
            <Text bold>
              {name}
            </Text>
          </Box>
        </Box>
        {await next(e)}
      </Box>
    )
  })
}

The mod's own code

Shown under the mod's licence (Apache-2.0); its text is below. Keep the notice if you copy these lines.

plugins/buddy/hooks/register.ts lines 913–927 · Pane

plugins/buddy/hooks/register.ts:913

  on('ui.render', { component: 'Pane' }, async ($, e, next) => {
    desktop = e.surface === 'desktop'
    if (e.requestId !== CARD_ID || !cardSnap) return next(e)
    const ui = $.ui.resolve(e)
    const shut = () => {
      cardSnap = undefined
      void $.ui.close({ id: CARD_ID }).catch(() => {})
    }
    // An empty field holds the focus: any typed key or Enter closes the card, and Esc does too.
    // Desktop draws an Input as a text box, so there the card closes with a button or Esc.
    const close = e.surface === 'desktop'
      ? ui.Button({ key: 'close', label: 'close', onPress: shut })
      : ui.Input({ key: 'close', placeholder: 'press any key', value: '', submitLabel: 'close', autoFocus: true, onInput: shut, onSubmit: shut })
    return showTree(ui, cardSnap, await $.clock.now(), close)
  })

plugins/buddy/hooks/register.ts lines 290–339 · Pane

plugins/buddy/hooks/register.ts:290

function showTree(ui: any, snap: Shown, now: number, close: any): any {
  if (snap.hatchAt === undefined) return close ? ui.Box({ flexDirection: 'column', children: [cardTree(ui, snap.c, snap.last, snap.r), ui.Box({ marginTop: 1, children: [close] })] }) : cardTree(ui, snap.c, snap.last, snap.r)
  const tick = Math.floor((now - snap.hatchAt) / HATCH_FRAME_MS)
  // The soul is ready once the model wrote its personality, or after 8 s without one.
  const ready = (buddy?.seed === snap.c.seed && personalityDone) || now - snap.hatchAt > 8_000
  if (snap.crackAt === undefined && ready && tick >= HATCH_MIN_ROUNDS * HATCH_WOBBLE) snap.crackAt = tick
  const frame = snap.crackAt === undefined ? tick % HATCH_WOBBLE : Math.min(HATCH_WOBBLE + tick - snap.crackAt, HATCH_FRAMES.length)
  if (frame >= HATCH_FRAMES.length) {
    const c = buddy?.seed === snap.c.seed ? buddy : snap.c
    const said = lastSaid || snap.last
    const { Box, Text } = ui
    return Box({
      flexDirection: 'column',
      children: [
        cardTree(ui, c, said, snap.r),
        Box({
          flexDirection: 'column',
          marginTop: 1,
          children: [
            Text({ dimColor: true, children: [`${c.name} is here · it'll chime in as you code`] }),
            Text({ dimColor: true, children: ['each line is one small model call on your plan'] }),
            Text({ dimColor: true, children: ['say its name to get its take · /buddy pet · /buddy off'] }),
            ...(close ? [Box({ marginTop: 1, children: [close] })] : []),
          ],
        }),
      ],
    })
  }
  const f = HATCH_FRAMES[frame]!
  const { Box, Text } = ui
  return Box({
    flexDirection: 'column',
    alignItems: 'center',
    borderStyle: 'round',
    borderColor: RAINBOW[tick % RAINBOW.length],
    paddingY: 1,
    children: [
      ...f.lines.map(l => Text({ children: [' '.repeat(1 + f.offset) + l + ' '.repeat(1 - f.offset)] })),
      Box({
        flexDirection: 'column',
        alignItems: 'center',
        marginTop: 1,
        children: [
          Text({ dimColor: true, children: ['hatching a coding buddy…'] }),
          Text({ dimColor: true, children: ["it'll watch you work and occasionally have opinions"] }),
        ],
      }),
    ],
  })
}

plugins/buddy/hooks/register.ts lines 258–287 · Pane

plugins/buddy/hooks/register.ts:258

function cardTree(ui: any, c: Companion, said: string, r: Rerolls): any {
  const { Box, Text } = ui
  const color = RARITY_THEME[c.rarity]
  const stat = (s: StatName) => {
    const v = c.stats[s]
    const n = Math.round(v / 10)
    return Box({ flexDirection: 'row', children: [Box({ width: 11, children: [Text({ children: [s] })] }), Text({ children: ['█'.repeat(n) + '░'.repeat(10 - n) + ' '] }), Text({ dimColor: true, children: [String(v).padStart(3)] })] })
  }
  return Box({
    flexDirection: 'column',
    borderStyle: 'round',
    borderColor: color,
    paddingX: 2,
    paddingY: 1,
    width: 40,
    flexShrink: 0,
    children: [
      Box({ justifyContent: 'space-between', children: [Text({ bold: true, color, children: [`${RARITY_STARS[c.rarity]} ${c.rarity.toUpperCase()}`] }), Text({ color, children: [c.species.toUpperCase()] })] }),
      ...(c.shiny ? [Text({ color: 'warning', bold: true, children: ['✨ SHINY ✨'] })] : []),
      Box({ flexDirection: 'column', marginY: 1, children: drawArt(ui, c, renderSprite(c, 0)) }),
      Text({ bold: true, children: [c.name] }),
      Box({ marginY: 1, children: [Text({ dimColor: true, italic: true, children: [`"${c.personality}"`] })] }),
      Box({ flexDirection: 'column', children: STAT_NAMES.map(stat) }),
      ...(said
        ? [Box({ flexDirection: 'column', marginTop: 1, children: [Text({ dimColor: true, children: ['last said'] }), Box({ borderStyle: 'round', borderColor: 'inactive', paddingX: 1, children: [Text({ dimColor: true, italic: true, children: [said] })] })] })]
        : []),
      Box({ marginTop: 1, children: [Text({ dimColor: true, children: [`rerolls ${r.bank}/${REROLL_BANK}`] })] }),
    ],
  })
}

plugins/buddy/hooks/register.ts lines 710–716 · Pane

plugins/buddy/hooks/register.ts:710

function drawArt(ui: any, c: Companion, lines: string[]): any[] {
  if (!desktop) return lines.map(line => ui.Text({ color: RARITY_THEME[c.rarity], children: [line] }))
  const w = Math.ceil(Math.max(...lines.map(l => l.length)) * 8.4) + 2
  const h = lines.length * 17
  const rows = lines.map((l, i) => `<text x="0" y="${i * 17 + 13}" xml:space="preserve">${esc(l)}</text>`).join('')
  return [ui.Svg({ alt: `${c.name} the ${c.species}`, width: w, height: h, source: `<svg xmlns="http://www.w3.org/2000/svg" width="${w}" height="${h}" font-family="ui-monospace,Menlo,monospace" font-size="14" fill="${svgColor(c)}">${rows}</svg>` })]
}

plugins/buddy/hooks/register.ts lines 968–1002 · Band

plugins/buddy/hooks/register.ts:968

  on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
    desktop = e.surface === 'desktop'
    docks = e.viewport?.isFullscreen === true && (e.viewport?.columns ?? 0) >= DOCK_COLUMNS
    // Desktop draws no status line but shares its settings, so a wrapped status line hides nothing there.
    if (!buddy || muted || (wrapped && e.surface !== 'desktop') || e.props.hasSurvey) return next(e)
    const now = await $.clock.now()
    if (now - paneDrawnAt < SEEN_MS) return next(e)
    if (!paneAsked && e.viewport?.isFullscreen === true) {
      paneAsked = true
      void $.ui.open({ id: PANE_ID, title: buddy.name, columns: PANE_COLUMNS }).catch(() => {})
    }
    drawnAt = now
    const { Box, Text } = $.ui.resolve(e)
    const words = talking(now)
    const art = sprite(buddy, now)
    // Desktop has room above the input: the full buddy stands at the right edge, its bubble to its left.
    if (e.surface === 'desktop' && (e.props.maxRows ?? 0) > art.length) {
      const color = RARITY_THEME[buddy.rarity]
      const ours = Box({
        flexDirection: 'row',
        justifyContent: 'flex-end',
        alignItems: 'flex-end',
        children: [
          ...(words ? [Box({ borderStyle: 'round', width: BUBBLE_COLUMNS, children: [Text({ wrap: 'wrap', children: [words] })] }), Text({ children: [' ◦ · '] })] : []),
          Box({ flexDirection: 'column', alignItems: 'center', children: [...drawArt({ Text, Svg: $.ui.resolve(e).Svg }, buddy, art), Text({ bold: true, children: [buddy.name] })] }),
        ],
      })
      const theirs = await next(e)
      return theirs ? Box({ flexDirection: 'column', children: [ours, theirs] }) : ours
    }
    const face = (now - pettedAt < PET_MS ? '♥ ' : '') + renderFace(buddy)
    const ours = Text({ children: [Text({ color: RARITY_THEME[buddy.rarity], children: [`${face} ${buddy.name}`] }), ...(words ? [`: ${words}`] : [])] })
    const theirs = await next(e)
    return theirs ? Box({ flexDirection: 'column', children: [ours, theirs] }) : ours
  })

Licence text (Apache-2.0)

                                 Apache License
                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

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   APPENDIX: How to apply the Apache License to your work.

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   Copyright 2026 Jason Noah Choi

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How to build this: Pane (panel), Keep state with $.store

What its code calls

runs programswrites filesenv varsdrives Clauderemembers

What its code shows

Read from the source at commit ece0c7d77369 on 2026-10-11. 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 read	Every module hooks/hooks.json names was read.plugins/buddy/hooks/register.ts
Parses	Every file parses as TypeScript or JavaScript.4 files parsed
All its code is in the mod	Every import is a file of the mod or the engine's own module; no packages, no require.all its code is in the mod
Readable	No 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 open	Network 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 draws	The 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, with its own branch for the desktop
Install line	Whether 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 Windows	Whether every program it starts through $.process exists on Windows (tail, date, open, osascript, /usr/… do not).runs no program a Windows PC lacks
Network	Whether every fetch names its https host in the code.no network
Programs	Whether every program it starts is named in the code and is not a shell, an interpreter or a network tool.plugins/buddy/hooks/register.ts:612 a program named at run time
Reads and sends	Whether it both reads something of yours (files, environment variables, the transcript, settings) and reaches outside (the network, an MCP server, another session, telemetry).reads environment variables, files, the transcript and reaches the network
Keys in the source	Whether the source holds what looks like an API key or a private key.no keys in the source
Licence	An open licence (MIT, Apache-2.0, BSD, ISC, Unlicense, 0BSD, CC0) with its text lets ModsCode show its code; otherwise the code is linked.Apache-2.0
Settings hooks	Hooks declared in hooks/hooks.json or plugin.json beside the module: a command (a shell when it has no args), an HTTP request, an MCP tool or a model prompt at an event. They run outside $.no settings hooks: its function hooks alone
Servers it ships	MCP servers (a program, or a URL; a headersHelper is a shell command; a .mcpb bundle is unpacked at run time), LSP servers, monitors (a shell command for the whole session) and bin/ (on the PATH of the Bash tool).ships no MCP or LSP server, no monitor, no bin/
Skills, commands, agents	What its Markdown declares beyond text: allowed-tools granted for the turn, hooks added when a skill is invoked, a command run before Claude reads the skill.no skills, commands, agents or workflows
Tools and MCP	Whether every tool it calls through $.tool.call and $.mcp.call is named in the code, and none is a shell (Bash through the tool runs a shell without $.process).calls no tool, MCP server or command
Asks of the model	Completions it runs ($.model.complete, fork, classify), subagents it spawns, prompts it submits as you, and the tools, commands and agents it adds.model.complete, adds command ?
Events it hooks	By what a hook there can do: gates (refuse a tool call, a prompt, a setting, another plugin), shapes (what the model reads: the system prompt, tool descriptions, each request), reads (your input, the events of the settings hooks, every event with *), and the rest.gates: command.run, config.set · reads: prompt.edit · also: session.start, turn.complete, ui.render (CommandOutput, Pane, AbovePrompt) · timers: clock.every
Reads, by name	The environment variables and files it names, and whether it reads the transcript, settings.json, the prompt box or the mouse selection.env: HOME, FNO_SESSION, FNO_PANE, FNO_MUX_DIR; files: a path computed at run time, …/…, …/package.json, its own folder/hooks/…, …/frames/….seen; the transcript
Writes, by name	The files and environment variables it names, and whether it changes settings, the prompt box, the clipboard, the conversation (a row the model reads) or another session.files: a path computed at run time, …/…, …/inner.json, …/frames/….json

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 its code (or run claude plugin validate . in its folder), weigh what it reaches, and install the commit you read.

From its marketplace

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 bllshttng/footnote

/plugin install buddy@footnote

/reload-plugins

This installs the marketplace's latest commit, which may not be the one read here (ece0c7d77369). Compare them before you install. /reload-plugins loads it into a session that is already open.

Try the commit ModsCode read

No marketplace needed. In a terminal, clone the repository, check out the commit read, validate the mod, and load it for one session:

git clone https://github.com/bllshttng/footnote

git -C footnote checkout ece0c7d77369a3bf05ffa3f379c6e4e5357f720a

claude plugin validate footnote/plugins/buddy

claude --plugin-dir footnote/plugins/buddy

The validate line lists the events the mod hooks and what it asks Claude Code to do, without running it. The last line loads the mod for this session only and writes nothing to your settings. If the author has rewritten history, the commit may no longer exist.

Ask Claude about it

With the ModsCode connector added, Claude can read this mod's code and what it reaches, and build on them. Ask it like this:

Read the ModsCode mod "bllshttng-buddy" with its code and make me one like it

Search them from Claude: the MCP connector

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Badge for your README

If this is your mod, paste this into your README. It links to this page.

README.md

[![ModsCode](https://modscode.com/badge/bllshttng-buddy.svg)](https://modscode.com/claude-mods/mods/bllshttng-buddy/)