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trace

A /trace pane with two tabs: the skills that loaded this session (when, from where, who invoked them, how large) and the web pages Claude fetched or saw in search results, ready to insert as citations

Code you can checkTerminal + desktopPaneStatus lineToastBoxButtonLinkText

What it does

  • Draws a pane, toasts
  • Watches Skill calls and can refuse them
  • Hooks session.start, skill.prompt
  • Keeps its own state between turns

Good points

  • No network calls
  • Starts no processes
  • Written in TypeScript
  • Handles errors

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 trace by nadav-grs (pane, status, toast), as modscode read it from the mod's code:
// https://modscode.com/gallery/hula-hoop-ai-trace/
// 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 $.ui.open({ id: 'my-pane', title: "Trace" })
  on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
    const { Box, Button, Text, Link } = $.ui.resolve(e)
    const summary = '…'
    const context = '…'
    const error = '…'
    const n = '…'
    const n2 = '…'
    const n3 = '…'
    const empty = '…'
    const title = '…'
    const text = '…'
    const text2 = '…'
    const text3 = '…'
    const age = '…'
    const link = '…'
    const sub = '…'
    const title2 = '…'
    const text4 = '…'
    const text5 = '…'
    const text6 = '…'
    const age2 = '…'
    const sub2 = '…'
    const title3 = '…'
    const text7 = '…'
    const text8 = '…'
    const text9 = '…'
    const age3 = '…'
    const sub3 = '…'
    const hidden = '…'
    const toLocaleTimeString = '…'
    const footer = '…'
    return (
      <Box flexDirection="column">
        <Box flexDirection="row" gap={1}>
          <Button variant="primary" />
          <Button variant="primary" />
          <Button variant="primary" />
        </Box>
        <Box flexDirection="row" gap={1}>
          <Text bold>
            {summary}
            <Text dimColor>
              {" · "}
              {context}
            </Text>
          </Text>
          <Button variant="primary" />
          <Button variant="primary" />
          <Button variant="primary" />
        </Box>
        <Text color="red">
          {error}
        </Text>
        <Text dimColor>
          {n}
        </Text>
        <Text dimColor>
          {n2}
        </Text>
        <Text dimColor>
          {n3}
        </Text>
        <Text dimColor>
          Checking…
        </Text>
        <Text dimColor>
          {empty}
        </Text>
        <Box flexDirection="column">
          <Box flexDirection="row" gap={1}>
            <Text wrap="truncate-end">
              <Text color="cyan">
                {"› "}
              </Text>
              <Text>
                ●
              </Text>
              {" "}
              {title}
              <Text>
                {" "}
                {text}
              </Text>
              <Text>
                {" "}
                {text2}
              </Text>
              <Text>
                {" "}
                {text3}
              </Text>
              <Text dimColor>
                {" "}
                {age}
              </Text>
            </Text>
            <Button dimColor>
              copy
            </Button>
            <Button dimColor />
            <Button dimColor />
            <Button dimColor />
            <Link href={`${link}`} />
          </Box>
          <Box flexDirection="row" gap={1}>
            <Text dimColor>
              {"    "}
              {sub}
            </Text>
            <Link href={`${link}`} />
          </Box>
        </Box>
        <Box flexDirection="column">
          <Box flexDirection="row" gap={1}>
            <Text wrap="truncate-end">
              <Text color="cyan">
                {"› "}
              </Text>
              <Text>
                ●
              </Text>
              {" "}
              {title2}
              <Text>
                {" "}
                {text4}
              </Text>
              <Text>
                {" "}
                {text5}
              </Text>
              <Text>
                {" "}
                {text6}
              </Text>
              <Text dimColor>
                {" "}
                {age2}
              </Text>
            </Text>
            <Button dimColor>
              copy
            </Button>
            <Button dimColor />
            <Button dimColor />
            <Button dimColor />
            <Link href={`${link}`} />
          </Box>
          <Box flexDirection="row" gap={1}>
            <Text dimColor>
              {"    "}
              {sub2}
            </Text>
            <Link href={`${link}`} />
          </Box>
        </Box>
        <Box flexDirection="column">
          <Box flexDirection="row" gap={1}>
            <Text wrap="truncate-end">
              <Text color="cyan">
                {"› "}
              </Text>
              <Text>
                ●
              </Text>
              {" "}
              {title3}
              <Text>
                {" "}
                {text7}
              </Text>
              <Text>
                {" "}
                {text8}
              </Text>
              <Text>
                {" "}
                {text9}
              </Text>
              <Text dimColor>
                {" "}
                {age3}
              </Text>
            </Text>
            <Button dimColor>
              copy
            </Button>
            <Button dimColor />
            <Button dimColor />
            <Button dimColor />
            <Link href={`${link}`} />
          </Box>
          <Box flexDirection="row" gap={1}>
            <Text dimColor>
              {"    "}
              {sub3}
            </Text>
            <Link href={`${link}`} />
          </Box>
        </Box>
        <Text dimColor>
          {"…and "}
          {hidden}
          {" more"}
        </Text>
        <Text dimColor>
          {"updated "}
          {toLocaleTimeString}
          <Text>
            {" · "}
            {footer}
          </Text>
        </Text>
      </Box>
    )
  })

  on('session.start', async ($, e, next) => {
    const tool = '…'
    const message = '…'
    const text = '…'
    await $.ui.toast(`trace: could not record ${tool} (${message})`)
    await $.ui.toast(`Copied ${text}`)
    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/trace/hooks/register.tsx lines 107–121 · Pane
plugins/trace/hooks/register.tsx:107
  on('ui.render', { component: 'Pane', requestId: PANE }, async ($, e) => {
    const active = await read($, tab)
    const since = await $.session.usage().then(u => u.startedAt, () => Date.now())
    const model: TabModel = active === 'skills' ? await skillsTab($, since) : await sourcesTab($, since)
    return tabPane($.ui.resolve(e), e.viewport, {
      ...model,
      tabs: TABS,
      activeTab: active,
      onTab: id => {
        const to = tabOf(id)
        if (to) void update($, tab, () => to.id)
      },
      onCopy: (text, surface) => void copy($, text, surface),
    })
  })
plugins/trace/hooks/tab-pane.tsx lines 76–191 · Pane
plugins/trace/hooks/tab-pane.tsx:76
export function tabPane(ui: ElementTable, viewport: RenderViewport | undefined, m: PaneModel) {
  const { Box, Text, Button, Link } = ui
  const notes = m.notes ?? []
  const shown = fitRows(m.rows, (viewport?.rows ?? 24) - CHROME_ROWS - notes.length - (m.error ? 1 : 0))
  const hidden = m.rows.slice(shown.length).filter(r => !r.heading).length
  const items = shown.filter(r => !r.heading) // headlines take no part in the columns
  const labelWidth = widest(items.map(r => r.label ?? ''), MAX_TITLE_PAD)
  const marks = items.some(r => r.highlight)
  // Everything on a row's line but its title.
  const rest = (r: Row) =>
    (marks ? 2 : 0) +
    (r.label === undefined ? 1 : labelWidth) +
    1 +
    (r.tags ?? []).reduce((n, t) => n + 1 + t.text.length, 0) +
    (r.age ? 1 + r.age.length : 0) +
    (r.copyText !== undefined ? 'copy'.length + BUTTON_CHROME : 0) +
    (r.actions ?? []).reduce((n, a) => n + a.label.length + BUTTON_CHROME, 0)
  const room = m.columns === undefined ? Infinity : Math.max(MIN_TITLE, m.columns - Math.max(0, ...items.map(rest)))
  const titleWidth = Math.min(room, widest(items.map(r => r.title), MAX_TITLE_PAD))
  const title = (r: Row) => (r.title.length > room ? truncate(r.title, room) : r.title).padEnd(titleWidth)

  return (
    <Box flexDirection="column">
      {m.tabs.length > 1 && (
        <Box flexDirection="row" gap={1}>
          {m.tabs.map(t => (
            <Button key={`tab:${t.id}`} variant={t.id === m.activeTab ? 'primary' : 'secondary'} onPress={() => m.onTab(t.id)}>
              {t.title}
            </Button>
          ))}
        </Box>
      )}
      <Box flexDirection="row" gap={1}>
        <Text bold>
          {m.summary}
          {m.context && <Text dimColor> · {m.context}</Text>}
        </Text>
        {(m.actions ?? []).map(a => (
          <Button key={a.key} variant={a.isActive ? 'primary' : 'secondary'} onPress={a.onPress}>
            {a.label}
          </Button>
        ))}
      </Box>
      {m.error && <Text color="red">{m.error}</Text>}
      {notes.map(n => (
        <Text dimColor>{n}</Text>
      ))}
      {m.checkedAt === undefined && !m.error && <Text dimColor>Checking…</Text>}
      {m.checkedAt !== undefined && !m.error && m.rows.length === 0 && <Text dimColor>{m.empty}</Text>}
      {shown.map(r => {
        if (r.heading) {
          return (
            <Box flexDirection="row" gap={1}>
              <Text bold wrap="truncate-end">
                {r.link ? <Link href={r.link}>{r.title}</Link> : r.title}
              </Text>
              {r.copyText !== undefined && (
                <Button key={`copy:${r.id}`} dimColor onPress={press => m.onCopy(r.copyText!, press.surface)}>
                  copy
                </Button>
              )}
            </Box>
          )
        }
        const color = r.state && STATE_COLORS[r.state]
        return (
          <Box flexDirection="column">
            <Box flexDirection="row" gap={1}>
              <Text wrap="truncate-end">
                {marks && <Text color="cyan">{r.highlight ? '› ' : '  '}</Text>}
                <Text color={color} dimColor={!color} bold={r.state !== 'idle'}>
                  {r.label === undefined ? DOT : r.label.padEnd(labelWidth)}
                </Text>{' '}
                {title(r)}
                {(r.tags ?? []).map(t => (
                  <Text color={t.color} dimColor={t.dimColor} bold={t.bold}>
                    {' '}
                    {t.text}
                  </Text>
                ))}
                {r.age && <Text dimColor> {r.age}</Text>}
              </Text>
              {r.copyText !== undefined && (
                <Button key={`copy:${r.id}`} dimColor onPress={press => m.onCopy(r.copyText!, press.surface)}>
                  copy
                </Button>
              )}
              {(r.actions ?? []).map(a => (
                <Button key={`${a.key}:${r.id}`} dimColor onPress={() => m.onRowAction?.(r, a.key)}>
                  {a.label}
                </Button>
              ))}
              {r.link && !r.sub && <Link href={r.link} />}
            </Box>
            {r.sub && (
              <Box flexDirection="row" gap={1}>
                <Text dimColor>
                  {'    '}
                  {truncate(r.sub, MAX_SUB)}
                </Text>
                {r.link && <Link href={r.link} />}
              </Box>
            )}
          </Box>
        )
      })}
      {hidden > 0 && <Text dimColor>…and {hidden} more</Text>}
      {m.checkedAt !== undefined && (
        <Text dimColor>
          updated {new Date(m.checkedAt).toLocaleTimeString()}
          {m.footer && <Text> · {m.footer}</Text>}
        </Text>
      )}
    </Box>
  )
}
Licence text (MIT)
MIT License

Copyright (c) 2026 Ariel Porath
Copyright (c) 2026 Hula-Hoop-AI

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

tool 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 0550b5e1dec2 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/trace/hooks/register.tsx
ParsesEvery file parses as TypeScript or JavaScript.6 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 Hula-Hoop-AI/supermods
/plugin install trace@supermods

This installs the marketplace's latest commit, which may not be the one read here (0550b5e1dec2). 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 "hula-hoop-ai-trace" with its code and make me a pane like it

Search them from Claude: the MCP connector

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