cs-update by hex: Claude Code mod code

What it does

Draws a pane, toasts
Adds /cs-update
Hooks session.start
Starts processes

Good points

No network calls
Small: 266 lines
Written in TypeScript
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 cs-update by cs (pane, toast), as ModsCode read it from the mod's code:
// https://modscode.com/claude-mods/mods/hex-cs-update/
// 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 $.ui.open({ id: 'my-pane', title: "cs ‹pending› is available" })
  on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
    const { Box, Text, Button } = $.ui.resolve(e)
    const version = '…'
    const line = '…'
    const line2 = '…'
    const line3 = '…'
    const version2 = '…'
    const line4 = '…'
    const line5 = '…'
    const line6 = '…'
    const version3 = '…'
    const line7 = '…'
    const line8 = '…'
    const line9 = '…'
    return (
      <Box flexDirection="column" paddingX={1}>
        <Text bold>
          {`cs ${version} is available`}
        </Text>
        <Box marginTop={1} flexDirection="column">
          <Text dimColor>
            {`updating… running cs -update ${version}`}
          </Text>
          <Text />
          <Box>
            <Button hotkey="1" plain label="update now" />
            <Text dimColor>
              {"   Esc: later"}
            </Text>
          </Box>
          <Text dimColor>
            Installs in place; the new files take effect on your next launch.
          </Text>
          <Text dimColor>
            Esc: close
          </Text>
        </Box>
        <Box flexDirection="column" marginTop={1}>
          <Text bold>
            {version}
          </Text>
          <Box>
            <Text>
              {line}
            </Text>
          </Box>
          <Box>
            <Text>
              {line2}
            </Text>
          </Box>
          <Box>
            <Text>
              {line3}
            </Text>
          </Box>
        </Box>
        <Box flexDirection="column" marginTop={1}>
          <Text bold>
            {version2}
          </Text>
          <Box>
            <Text>
              {line4}
            </Text>
          </Box>
          <Box>
            <Text>
              {line5}
            </Text>
          </Box>
          <Box>
            <Text>
              {line6}
            </Text>
          </Box>
        </Box>
        <Box flexDirection="column" marginTop={1}>
          <Text bold>
            {version3}
          </Text>
          <Box>
            <Text>
              {line7}
            </Text>
          </Box>
          <Box>
            <Text>
              {line8}
            </Text>
          </Box>
          <Box>
            <Text>
              {line9}
            </Text>
          </Box>
        </Box>
      </Box>
    )
  })

  on('session.start', async ($, e, next) => {
    const message = '…'
    await $.ui.toast(`cs-update: could not record the finished update: ${message}`)
    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.

mods/cs-update/hooks/register.tsx lines 101–148 · Pane

mods/cs-update/hooks/register.tsx:101

  on('ui.render', { component: 'Pane' }, async ($, e, next) => {
    if (e.requestId !== PANE) return next(e)
    // The engine re-renders the open pane the instant it reloads this
    // module, before session.start (which does not fire on a reload) gets a
    // chance to restore it, so a pane asked to draw with no module state
    // tries the marker itself before giving up to the ordinary gate.
    if (version === undefined && !(await restoreDone($, await $.session.cwd()))) return next(e)
    const { Box, Text, Button } = await $.ui.resolve(e)
    // A lone pane draws no title of its own (the tab shows only with two or
    // more), so the body opens with it. The pane does not scroll (measured
    // live 2026-09-22 on Claude Code 2.1.278), and a long changelog span
    // pushes anything below it off the bottom, so the keys sit right under
    // the title, above the notes, where a long span can never hide them.
    // Version headings take the session colour cs recorded, as the status
    // bar's name does; a continuation line hangs under its bullet on the
    // changelog's own indent, which parseSpan keeps in the line (as a bullet
    // keeps its `- `), so the text is drawn verbatim and no margin doubles it.
    return (
      <Box flexDirection="column" paddingX={1}>
        <Text bold>{`cs ${version} is available`}</Text>
        <Box marginTop={1} flexDirection="column">
          {phase === 'running' && <Text dimColor>{`updating… running cs -update ${version}`}</Text>}
          {(phase === 'done' || phase === 'failed') && <Text>{outcome}</Text>}
          {(phase === 'idle' || phase === 'failed') && (
            <Box>
              {/* a Button is a block: nested in a Text the engine refuses the whole tree (measured in the cs mod), so the keys stand in a Box */}
              <Button key="cs-update-now" hotkey="1" plain label="update now" onPress={() => runUpdate($)} />
              <Text dimColor>{'   Esc: later'}</Text>
            </Box>
          )}
          {phase === 'idle' && <Text dimColor>{'Installs in place; the new files take effect on your next launch.'}</Text>}
          {phase === 'done' && <Text dimColor>{'Esc: close'}</Text>}
        </Box>
        {sections === undefined || sections.length === 0
          ? <Box marginTop={1}><Text>{`Release notes could not be fetched at launch; the update is ${version}.`}</Text></Box>
          : sections.map(s => (
              <Box key={`v-${s.version}`} flexDirection="column" marginTop={1}>
                <Text bold color={accent}>{s.version}</Text>
                {s.lines.map((line, j) => (
                  <Box key={`l-${s.version}-${j}`}>
                    <Text>{line}</Text>
                  </Box>
                ))}
              </Box>
            ))}
      </Box>
    )
  })

Licence text (MIT)

MIT License

Copyright (c) 2025 cs-tool contributors

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.

How to build this: Pane (panel), Add a slash command

What its code calls

runs programswrites filesenv vars

What its code shows

Read from the source at commit 3620edbfe335 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.mods/cs-update/hooks/register.tsx
Parses	Every file parses as TypeScript or JavaScript.1 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, the same in both
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.its repository's .claude-plugin/marketplace.json does not list it: no marketplace line to give; the page shows how to try the commit read
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.mods/cs-update/hooks/register.tsx:247 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, but reaches nothing outside
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.MIT
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.adds command cs-update
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 (cs-update) · also: session.start, ui.render (Pane)
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: CS_UPDATE_AVAILABLE, HOME, CS_BIN; files: …/.cs/local, …/.cs/local/disabled, …/…, a path computed at run time
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: …/…

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.

Its repository's .claude-plugin/marketplace.json does not list it, so there is no marketplace line to give.

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/hex/claude-sessions

git -C claude-sessions checkout 3620edbfe33539364dda645fbb9242b95c4170d9

claude plugin validate claude-sessions/mods/cs-update

claude --plugin-dir claude-sessions/mods/cs-update

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 "hex-cs-update" with its code and make me one like it

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