ModsCode / Claude Code Mods / Ranking / bouncer
bouncer
Checks each mod at the door and lists what it can reach, from Claude Code's own validator.
What it does
- Draws a band above the prompt, a pane, toasts
- Adds /bouncer
- Hooks plugin.register, session.start
- 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 bouncer by modmyclaude (pane, band, toast), as ModsCode read it from the mod's code:
// https://modscode.com/claude-mods/mods/modmyclaude-bouncer/
// 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, Button } = $.ui.resolve(e)
const line = '…'
return (
<Box flexDirection="column">
<Box flexDirection="row" gap={1}>
<Box flexShrink={1}>
<Text color="warning" wrap="truncate-end">
{line}
</Text>
</Box>
<Button label="Show" />
</Box>
{await next(e)}
</Box>
)
})
// the pane: open it with $.ui.open({ id: 'my-pane', title: "Bouncer" })
on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
const { Box, Text } = $.ui.resolve(e)
const ch = '…'
const ch2 = '…'
const ch3 = '…'
const ch4 = '…'
const ch5 = '…'
const ch6 = '…'
const ch7 = '…'
const ch8 = '…'
const ch9 = '…'
return (
<Box flexDirection="column" paddingX={1}>
<Box flexDirection="row" gap={1} alignItems="center">
<Box flexDirection="column" flexShrink={0}>
<Box flexDirection="row" flexWrap="nowrap">
<Box width={1}>
<Text>
{ch}
</Text>
</Box>
<Box width={1}>
<Text>
{ch2}
</Text>
</Box>
<Box width={1}>
<Text>
{ch3}
</Text>
</Box>
</Box>
<Box flexDirection="row" flexWrap="nowrap">
<Box width={1}>
<Text>
{ch4}
</Text>
</Box>
<Box width={1}>
<Text>
{ch5}
</Text>
</Box>
<Box width={1}>
<Text>
{ch6}
</Text>
</Box>
</Box>
<Box flexDirection="row" flexWrap="nowrap">
<Box width={1}>
<Text>
{ch7}
</Text>
</Box>
<Box width={1}>
<Text>
{ch8}
</Text>
</Box>
<Box width={1}>
<Text>
{ch9}
</Text>
</Box>
</Box>
</Box>
<Text bold>
Bouncer
</Text>
</Box>
<Box>
<Text color="subtle" wrap="wrap">
Checking the mods through the validator...
</Text>
</Box>
<Box height={1} />
<Box marginTop={1}>
<Text color="subtle" wrap="wrap">
In the warning colour: runs programs, runs tools, reaches the network, calls MCP tools, calls the API as you, starts su…
</Text>
</Box>
</Box>
)
})
on('session.start', async ($, e, next) => {
const length = '…'
await $.ui.toast(`bouncer: ${length} mods checked.`)
await $.ui.toast(`bouncer: noted. The line goes until a mod is new or changed again.`)
return next(e)
})
}
The mod's own code
Shown under the mod's licence (MIT); its text is below. Keep the notice if you copy these lines.
mods/bouncer/hooks/register.tsx lines 242–262 · Band
on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
if (e.props.hasSurvey) return next(e)
const line = await read($, news)
if (line === null) return next(e)
const below = await next(e).catch(() => null)
if (below !== null && holdsBeneath(below)) return below
const { Box, Text, Button } = $.ui.resolve(e)
return (
<Box key="bouncer-wrap" flexDirection="column">
{below}
<Box key="bouncer" flexDirection="row" gap={1}>
<Box key="bouncer-line" flexShrink={1}>
<Text color="warning" wrap="truncate-end">
{line}
</Text>
</Box>
<Button key="bouncer-show" label="Show" onPress={() => void openPane($)} />
</Box>
</Box>
)
})mods/bouncer/hooks/register.tsx lines 265–359 · Pane
on('ui.render', { component: 'Pane', requestId: PANE }, async ($, e) => {
const elements = $.ui.resolve(e)
const { Box, Button, Text } = elements
const list = await read($, rows)
const unfolded = await read($, open)
const at = await read($, checkedAt)
const checking = await read($, isChecking)
const columns = e.props.bodyColumns
const body: RenderNode[] = []
// Two folders with one name (a copy under development beside the installed one) are two rows: numbered keys, and each shows its folder.
const twins = new Map<string, number>()
for (const row of list) twins.set(row.name, (twins.get(row.name) ?? 0) + 1)
const numbered = new Map<string, number>()
for (const row of list) {
const tag = row.ok ? (row.isNew ? 'new' : row.isChanged ? 'changed' : '') : ''
const nth = (numbered.get(row.name) ?? 0) + 1
numbered.set(row.name, nth)
const isTwin = (twins.get(row.name) ?? 0) > 1
const key = isTwin ? `${row.name}-${nth}` : row.name
body.push(
<Box key={`row-${key}`} flexDirection="column">
<Box key="line" flexDirection="row" gap={1}>
<Box key="name" flexShrink={0}>
<Text bold={tag !== ''}>{row.name}</Text>
</Box>
{isTwin ? (
<Box key="folder" flexShrink={1} minWidth={12}>
<Text dimColor wrap="truncate-start">
{row.root}
</Text>
</Box>
) : null}
{row.version ? (
<Box key="version" flexShrink={0}>
<Text dimColor>{row.version}</Text>
</Box>
) : null}
{tag !== '' ? (
<Box key="tag" flexShrink={0}>
<Text color="warning">{tag}</Text>
</Box>
) : null}
{row.isLoaded ? (
<Box key="loaded" flexShrink={0}>
<Text dimColor>loaded</Text>
</Box>
) : null}
<Box key="reach" flexDirection="row" flexGrow={1} flexShrink={1} flexWrap="wrap">
{row.ok ? (
reachWords(row.reach).map((w, i) => (
<Text key={`w-${i}`} color={w.warn ? 'warning' : undefined}>
{i === 0 ? w.word : `, ${w.word}`}
</Text>
))
) : (
<Text color="warning" wrap="truncate-end">{`could not check: ${row.reason}`}</Text>
)}
</Box>
{row.ok ? (
<Button key={`details-${key}`} label={unfolded === row.root ? 'less' : 'details'} onPress={() => update($, open, was => (was === row.root ? null : row.root))} />
) : null}
</Box>
{row.ok && unfolded === row.root ? (
<Box key="details" flexDirection="column" paddingLeft={2}>
{(row.reach.notes.length === 0 ? ['the validator reported no hooks and no calls'] : row.reach.notes).map((note, i) => (
<Text key={`note-${i}`} dimColor wrap="wrap">
{note}
</Text>
))}
</Box>
) : null}
</Box>,
)
}
return (
<Box key="bouncer-pane" flexDirection="column" paddingX={1}>
<Box key="title" flexDirection="row" gap={1} alignItems="center">
{columns >= BOLT_COLUMNS.tiny + 37 ? boltSprite(elements, e.surface, { size: 'tiny', pose: 'idle' }, 'title-bolt') : null}
<Text bold>Bouncer</Text>
</Box>
<Box key="sub">
<Text color="subtle" wrap="wrap">
{checking ? 'Checking the mods through the validator...' : at === 0 ? 'No check has run yet. /bouncer check runs one.' : `Checked ${list.length} mod${list.length === 1 ? '' : 's'} at ${clockWords(at)}. Facts from the validator, not a verdict; nothing leaves the machine.`}
</Text>
</Box>
<Box key="gap" height={1} />
{body}
<Box key="foot" marginTop={1}>
<Text color="subtle" wrap="wrap">
In the warning colour: runs programs, runs tools, reaches the network, calls MCP tools, calls the API as you, starts subagents, can type for you, can change tool calls, messages other sessions, changes your settings. Bouncer never blocks, unloads or changes a mod.
</Text>
</Box>
</Box>
)
})mods/bouncer/hooks/bolt-draw.tsx lines 29–65 · Pane
export function boltSprite(elements: Elements, surface: string, pick: BoltPick, key = 'bolt'): RenderElement {
const { Box, Text, Raster } = elements
const cells = boltOf(pick)
const columns = cells[0]?.length ?? 0
if (surface === 'terminal' && Raster !== undefined) {
return <Raster key={key} columns={columns} rows={cells.length} cells={rasterCells(cells)} />
}
const paint = (cell: BoltCell): TextProps => ({
...(cell.fg !== undefined ? { color: cell.fg } : {}),
...(cell.bg !== undefined ? { backgroundColor: cell.bg } : {}),
})
if (surface === 'desktop') {
return (
<Box key={key} flexDirection="column" flexShrink={0}>
{cells.map(line => (
<Box flexDirection="row" flexWrap="nowrap">
{line.map(cell =>
cell.fg === undefined && cell.bg === undefined ? <Box width={1} /> : <Box width={1}><Text {...paint(cell)}>{cell.ch}</Text></Box>,
)}
</Box>
))}
</Box>
)
}
return (
<Box key={key} flexDirection="column" flexShrink={0}>
{cells.map(line => (
<Text>
{boltRuns(line).map(run => {
const text = run.ch.replace(/ /g, ' ')
return run.fg === undefined && run.bg === undefined ? text : <Text {...paint(run)}>{text}</Text>
})}
</Text>
))}
</Box>
)
}Licence text (MIT)
MIT License Copyright (c) 2026 modmyclaude 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), Deny a tool call
What its code calls
runs programsreads filesenv varstool callsremembers
What its code shows
Read from the source at commit 1949bfa9cdc5. 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/bouncer/hooks/register.tsx |
| 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.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/bouncer/hooks/register.tsx:120 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 bouncer |
| 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: plugin.register, command.run (bouncer) · also: session.start, ui.render (AbovePrompt, 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: CLAUDE_CONFIG_DIR, USERPROFILE, HOME; files: 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.writes no files, environment variables, settings or conversation rows |
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/modmyclaude/claude-code-modsgit -C claude-code-mods checkout 1949bfa9cdc52cf547f3ac0681cba15e9624c4b6claude plugin validate claude-code-mods/mods/bouncerclaude --plugin-dir claude-code-mods/mods/bouncerThe 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 or ChatGPT about it
With ModsCode added as a connector, Claude or ChatGPT can read this mod's code, what it reaches and how its controls are wired, and build on them. Ask it like this:
Read the ModsCode mod "modmyclaude-bouncer" with its code and make me one like itAdd the ModsCode MCP to Claude or ChatGPT
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Badge for your README
If this is your mod, paste this into your README. It links to this page.
[](https://modscode.com/claude-mods/mods/modmyclaude-bouncer/)