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mod-manager

Pick which claude-mods you want: install, turn on or off, update, or remove each mod from one panel (/mods), with presets. No need to install everything.

Code you can checkTerminal + desktopPaneToastBoxButtonText

What it does

  • Draws a pane, toasts
  • Adds /mods
  • Hooks session.start
  • Keeps its own state between turns
  • Starts processes

Good points

  • No network calls
  • Written in TypeScript
  • Handles errors
  • Writes no files

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 mod-manager by Michael Goldenberg (pane, toast), as modscode read it from the mod's code:
// https://modscode.com/gallery/mishgoldenberg-mod-manager/
// 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 $.ui.open({ id: 'my-pane', title: "Mods" })
  on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
    const { Box, Text, Button } = $.ui.resolve(e)
    const status = '…'
    const note = '…'
    const i = '…'
    const label = '…'
    const version = '…'
    const latest = '…'
    const icon = '…'
    const name = '…'
    const blurb = '…'
    const icon2 = '…'
    const name2 = '…'
    const blurb2 = '…'
    const icon3 = '…'
    const name3 = '…'
    const blurb3 = '…'
    return (
      <Box flexDirection="column" gap={1}>
        <Box flexDirection="column">
          <Box gap={1}>
            <Text color="error">
              ✗
            </Text>
            <Text bold>
              mod-manager
            </Text>
            <Text dimColor wrap="truncate-end">
              {status}
            </Text>
          </Box>
          <Text color="warning">
            ▲
            {" Changes apply in your next session (start a new chat or restart Claude Code)."}
          </Text>
          <Text color="error">
            ✗
            {" "}
            {note}
          </Text>
          <Text dimColor>
            Asking Claude Code which mods are installed… this takes a few seconds.
          </Text>
        </Box>
        <Box gap={1}>
          <Button hotkey="u" variant="primary" label="Update 1 mod" />
          <Text dimColor>
            Takes effect in your next session.
          </Text>
        </Box>
        <Box flexDirection="column">
          <Box gap={1}>
            <Text dimColor>
              Presets (turns off what isn't listed, removes nothing)
            </Text>
          </Box>
          <Box gap={1} flexWrap="wrap">
            <Button plain hotkey={`${i}`} label={`${label}`} />
            <Button plain hotkey={`${i}`} label={`${label}`} />
            <Button plain hotkey={`${i}`} label={`${label}`} />
          </Box>
        </Box>
        <Box flexDirection="column">
          <Box gap={1}>
            <Text dimColor>
              This manager
            </Text>
          </Box>
          <Box gap={1}>
            <Text color="claude">
              ●
            </Text>
            <Text bold>
              mod-manager
            </Text>
            <Text color="claude">
              {`${version} → ${latest}`}
            </Text>
            <Button plain label="Update" />
          </Box>
        </Box>
        <Box flexDirection="column">
          <Box gap={1}>
            <Text dimColor>
              Mods
            </Text>
          </Box>
          <Box flexDirection="column">
            <Box gap={1}>
              <Text>
                {icon}
              </Text>
              <Text bold>
                {name}
              </Text>
              <Text color="claude">
                {`${version} → ${latest}`}
              </Text>
              <Text color="warning">
                uses tokens
              </Text>
              <Button plain label="Update" />
              <Button plain label="Install" />
              <Button plain label="Turn on" />
              <Button plain label="Turn off" />
              <Button plain label="Remove" />
            </Box>
            <Box paddingLeft={2}>
              <Text dimColor wrap="truncate-end">
                {blurb}
              </Text>
            </Box>
          </Box>
          <Box flexDirection="column">
            <Box gap={1}>
              <Text>
                {icon2}
              </Text>
              <Text bold>
                {name2}
              </Text>
              <Text color="claude">
                {`${version} → ${latest}`}
              </Text>
              <Text color="warning">
                uses tokens
              </Text>
              <Button plain label="Update" />
              <Button plain label="Install" />
              <Button plain label="Turn on" />
              <Button plain label="Turn off" />
              <Button plain label="Remove" />
            </Box>
            <Box paddingLeft={2}>
              <Text dimColor wrap="truncate-end">
                {blurb2}
              </Text>
            </Box>
          </Box>
          <Box flexDirection="column">
            <Box gap={1}>
              <Text>
                {icon3}
              </Text>
              <Text bold>
                {name3}
              </Text>
              <Text color="claude">
                {`${version} → ${latest}`}
              </Text>
              <Text color="warning">
                uses tokens
              </Text>
              <Button plain label="Update" />
              <Button plain label="Install" />
              <Button plain label="Turn on" />
              <Button plain label="Turn off" />
              <Button plain label="Remove" />
            </Box>
            <Box paddingLeft={2}>
              <Text dimColor wrap="truncate-end">
                {blurb3}
              </Text>
            </Box>
          </Box>
        </Box>
        <Box gap={1}>
          <Button hotkey="r" label="Refresh" />
          <Button label="Check for updates" />
        </Box>
      </Box>
    )
  })

  on('session.start', async ($, e, next) => {
    const name = '…'
    const done = '…'
    await $.ui.toast(`✓ ${name}: ${done}. Applies in your next session.`)
    await $.ui.toast(`✓ Updated 0 mod. Applies in your next session.`)
    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/mod-manager/hooks/register.tsx lines 326–427 · Pane
  on('ui.render', { component: 'Pane', requestId: PANE }, async ($, e) => {
    const { Box, Text, Button } = $.ui.resolve(e)
    const kit = { Box, Text }
    const list = await read($, rows)
    const me = await read($, self)
    const working = await read($, busy)
    const note = await read($, message)
    const restart = await read($, needsRestart)
    const onCount = list.filter(r => r.status === 'on').length
    const updates = [...list, ...(me !== null ? [me] : [])].filter(r => r.latest !== undefined).length
    const icon: Record<ModStatus, string> = { on: GLYPH.on, off: GLYPH.off, available: GLYPH.off }
    const color: Record<ModStatus, string> = { on: TONE.accent, off: TONE.dim, available: TONE.dim }
    const status =
      working !== null
        ? `working on ${working}…`
        : list.length === 0
          ? 'reading what is installed…'
          : `${onCount} on of ${list.length}${updates > 0 ? ` · ${updates} update${updates === 1 ? '' : 's'} available` : ''}`
    const version = (r: ModRow) =>
      r.version === undefined ? null : r.latest !== undefined ? <Text color={TONE.accent}>{`${r.version} → ${r.latest}`}</Text> : <Text dimColor>{r.version}</Text>

    return (
      <Box flexDirection="column" gap={1}>
        <Box flexDirection="column">
          {header(kit, note !== '' ? GLYPH.fail : updates > 0 ? GLYPH.warn : GLYPH.on, note !== '' ? TONE.bad : updates > 0 ? TONE.warn : TONE.accent, 'mod-manager', status)}
          {restart && (
            <Text color={TONE.warn}>
              {GLYPH.warn} Changes apply in your next session (start a new chat or restart Claude Code).
            </Text>
          )}
          {note !== '' && (
            <Text color={TONE.bad}>
              {GLYPH.fail} {note}
            </Text>
          )}
          {list.length === 0 && note === '' && empty(kit, 'Asking Claude Code which mods are installed… this takes a few seconds.')}
        </Box>

        {updates > 0 && (
          <Box gap={1}>
            <Button key="update-all" hotkey="u" variant="primary" label={`Update ${updates === 1 ? '1 mod' : `all ${updates}`}`} onPress={() => void updateAll($)} />
            <Text dimColor>Takes effect in your next session.</Text>
          </Box>
        )}

        {section(
          kit,
          "Presets (turns off what isn't listed, removes nothing)",
          <Box gap={1} flexWrap="wrap">
            {PRESETS.map((p, i) => (
              <Button key={`preset-${p.id}`} plain hotkey={String(i + 1)} label={p.label} onPress={() => void applyPreset($, p.id)} />
            ))}
          </Box>,
        )}

        {me !== null && me.latest !== undefined &&
          section(
            kit,
            'This manager',
            <Box gap={1}>
              <Text color={TONE.accent}>{GLYPH.on}</Text>
              <Text bold>mod-manager</Text>
              {version(me)}
              <Button key="update-mod-manager" plain label="Update" onPress={() => void act($, me, 'update')} />
            </Box>,
          )}

        {list.length > 0 &&
          section(
            kit,
            'Mods',
            list.map(r => (
              <Box flexDirection="column">
                <Box gap={1}>
                  <Text color={color[r.status]}>{icon[r.status]}</Text>
                  <Text bold>{r.name}</Text>
                  {version(r)}
                  {r.usesTokens && <Text color={TONE.warn}>uses tokens</Text>}
                  {r.latest !== undefined && <Button key={`update-${r.name}`} plain label="Update" onPress={() => void act($, r, 'update')} />}
                  {r.status === 'available' && <Button key={`install-${r.name}`} plain label="Install" onPress={() => void act($, r, 'install')} />}
                  {r.status === 'off' && <Button key={`enable-${r.name}`} plain label="Turn on" onPress={() => void act($, r, 'enable')} />}
                  {r.status === 'on' && <Button key={`disable-${r.name}`} plain label="Turn off" onPress={() => void act($, r, 'disable')} />}
                  {r.status !== 'available' && <Button key={`remove-${r.name}`} plain label="Remove" onPress={() => void act($, r, 'uninstall')} />}
                </Box>
                {r.blurb !== '' && (
                  <Box paddingLeft={2}>
                    <Text dimColor wrap="truncate-end">
                      {r.blurb}
                    </Text>
                  </Box>
                )}
              </Box>
            )),
          )}

        <Box gap={1}>
          <Button key="refresh" hotkey="r" label="Refresh" onPress={() => void refresh($)} />
          <Button key="check" label="Check for updates" onPress={() => void checkForUpdates($)} />
        </Box>
      </Box>
    )
  })
plugins/mod-manager/hooks/register.tsx lines 12–20 · Pane
function header({ Box, Text }: Kit, glyph: string, tone: string, name: string, status: string) {
  return (
    <Box gap={1}>
      <Text color={tone}>{glyph}</Text>
      <Text bold>{name}</Text>
      <Text dimColor wrap="truncate-end">{status}</Text>
    </Box>
  )
}
plugins/mod-manager/hooks/register.tsx lines 45–47 · Pane
function empty({ Text }: Kit, text: string) {
  return <Text dimColor>{text}</Text>
}
plugins/mod-manager/hooks/register.tsx lines 23–33 · Pane
function section({ Box, Text }: Kit, label: string, rows: RenderChildren, aside?: RenderChildren) {
  return (
    <Box flexDirection="column">
      <Box gap={1}>
        <Text dimColor>{label}</Text>
        {aside}
      </Box>
      {rows}
    </Box>
  )
}
Licence text (MIT)
MIT License

Copyright (c) 2026 Michael Goldenberg

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

runs programsreads filesenv varsremembers

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 6949e8dde6af 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/mod-manager/hooks/register.tsx
ParsesEvery file parses as TypeScript or JavaScript.1 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.plugins/mod-manager/hooks/register.tsx:93 a program named at run time
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 mishgoldenberg/claude-mods
/plugin install mod-manager@claude-mods

This installs the marketplace's latest commit, which may not be the one read here (6949e8dde6af). 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 "mishgoldenberg-mod-manager" with its code and make me a pane like it

Search them from Claude: the MCP connector

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