context-statusline by petritol: Claude Code mod code and design

What it does

Draws a band above the prompt
Hooks session.measure

Good points

No network calls
Starts no processes
Small: 177 lines
Written in TypeScript

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)

import type { Register } from 'claude-code'

// Drawn like context-statusline by Petri Tolonen (band), as modscode read it from the mod's code:
// https://modscode.com/gallery/petritol-context-statusline/
// 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 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 head = '…'
    const glyph = '…'
    const glyph2 = '…'
    const glyph3 = '…'
    const tail = '…'
    return (
      <Box flexDirection="column">
        <Text backgroundColor="#000000" wrap="truncate">
          {head}
          <Text>
            {glyph}
          </Text>
          <Text>
            {glyph2}
          </Text>
          <Text>
            {glyph3}
          </Text>
          {tail}
        </Text>
        {await next(e)}
      </Box>
    )
  })
}

The mod's own code

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

hooks/register.tsx lines 143–176 · Band

hooks/register.tsx:143

  on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
    if (e.props.hasSurvey) return next(e)
    await read($, measured)

    const [{ context }, model, root] = await Promise.all([
      $.session.usage(),
      $.session.model(),
      $.session.root(),
    ])
    const tokens = context.tokens ?? 0
    const budget = budgetTokens(contextBudget, context.window)
    const { head, bar, tail } = statusLine({
      model: modelDisplayName(model),
      project: root.split(/[\\/]/).filter(Boolean).pop() ?? '',
      tokens,
      window: context.window,
      percent: Math.max(0, Math.min(100, context.percent ?? 0)),
      budget,
      columns: e.props.bodyColumns,
    })

    const { Text } = $.ui.resolve(e)
    return (
      <Text color={colorFor(tokens, budget)} backgroundColor="#000000" wrap="truncate">
        {head}
        {bar.map(cell => (
          <Text color={cell.color}>
            {cell.glyph}
          </Text>
        ))}
        {tail}
      </Text>
    )
  })

Licence text (Unlicense)

This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
software, either in source code form or as a compiled binary, for any purpose,
commercial or non-commercial, and by any means.

In jurisdictions that recognize copyright laws, the author or authors of this
software dedicate any and all copyright interest in the software to the public
domain. We make this dedication for the benefit of the public at large and to
the detriment of our heirs and successors. We intend this dedication to be an
overt act of relinquishment in perpetuity of all present and future rights to
this software under copyright law.

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 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.

For more information, please refer to <https://unlicense.org>

What its code calls

nothing found

What its code shows

Read from the source at commit 257681335104 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 read	Every module hooks/hooks.json names was read.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 install line to give
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.starts no programs
Reads and sends	Whether it both reads files or environment variables and reaches the network.reaches no 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.Unlicense

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's .claude-plugin/marketplace.json does not list it, so there is no install line to give. Read it as code, or follow its author's README.

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 "petritol-context-statusline" with its code and make me a pane like it

Search them from Claude: the MCP connector