relay by hal-9: Claude Code mod code

What it does

Draws a band above the prompt, a pane, toasts
Adds /relay
Hooks session.start, turn.complete
Keeps its own state between turns
Starts processes

Good points

No network calls
Small: 268 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 relay by Tuncay Aydin (pane, band, toast), as ModsCode read it from the mod's code:
// https://modscode.com/claude-mods/mods/hal-9-relay/
// 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 LABEL = '…'
    const minutes = '…'
    const LABEL2 = '…'
    const minutes2 = '…'
    const LABEL3 = '…'
    const minutes3 = '…'
    return (
      <Box flexDirection="column">
        <Box>
          <Text dimColor>
            {"relay "}
          </Text>
          <Text>
            {LABEL}
            {" "}
            <Text dimColor>
              {minutes}
            </Text>
            {" "}
          </Text>
          <Text>
            {LABEL2}
            {" "}
            <Text dimColor>
              {minutes2}
            </Text>
            {" "}
          </Text>
          <Text>
            {LABEL3}
            {" "}
            <Text dimColor>
              {minutes3}
            </Text>
            {" "}
          </Text>
          <Button hotkey="c" label="check" dimColor />
          <Text>
            {" "}
          </Text>
          <Button hotkey="a" label="adversarial" dimColor />
          <Text>
            {" "}
          </Text>
          <Button hotkey="h" label="hand over" dimColor />
          <Text>
            {" "}
          </Text>
          <Button hotkey="v" label="verify" dimColor />
        </Box>
        {await next(e)}
      </Box>
    )
  })

  // the pane: open it with $.ui.open({ id: 'my-pane', title: "relay" })
  on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
    const { Box, Text, Button } = $.ui.resolve(e)
    const LABEL = '…'
    const minutes = '…'
    const verdict = '…'
    const split = '…'
    const summary = '…'
    const severity = '…'
    const file = '…'
    const line_start = '…'
    const title = '…'
    const severity2 = '…'
    const file2 = '…'
    const title2 = '…'
    const severity3 = '…'
    const file3 = '…'
    const title3 = '…'
    const output = '…'
    const LABEL2 = '…'
    const minutes2 = '…'
    const split2 = '…'
    const summary2 = '…'
    const severity4 = '…'
    const file4 = '…'
    const title4 = '…'
    const severity5 = '…'
    const file5 = '…'
    const title5 = '…'
    const severity6 = '…'
    const file6 = '…'
    const title6 = '…'
    const output2 = '…'
    const LABEL3 = '…'
    const minutes3 = '…'
    const split3 = '…'
    const summary3 = '…'
    const severity7 = '…'
    const file7 = '…'
    const title7 = '…'
    const severity8 = '…'
    const file8 = '…'
    const title8 = '…'
    const severity9 = '…'
    const file9 = '…'
    const title9 = '…'
    const output3 = '…'
    return (
      <Box flexDirection="column">
        <Text dimColor>
          No runs yet. Press c, a, h or v in the band, or /relay.
        </Text>
        <Box flexDirection="column" marginBottom={1}>
          <Box>
            <Text bold>
              {LABEL}
            </Text>
            <Text dimColor>
              {" "}
              {minutes}
              {` · ${verdict}`}
            </Text>
            <Text>
              {" "}
            </Text>
            <Button label="cancel" dimColor />
            <Button label="clear" dimColor />
          </Box>
          <Text dimColor>
            {split}
          </Text>
          <Text>
            {summary}
          </Text>
          <Box>
            <Text color="red">
              {severity}
            </Text>
            <Text>
              {" "}
              {file}
              {`:${line_start}`}
              {" "}
              {title}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Box>
            <Text color="red">
              {severity2}
            </Text>
            <Text>
              {" "}
              {file2}
              {`:${line_start}`}
              {" "}
              {title2}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Box>
            <Text color="red">
              {severity3}
            </Text>
            <Text>
              {" "}
              {file3}
              {`:${line_start}`}
              {" "}
              {title3}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Button variant="primary" label="fix all" />
          <Box flexDirection="column">
            <Text dimColor>
              {output}
            </Text>
            <Button variant="primary" label="pull into Claude" />
          </Box>
        </Box>
        <Box flexDirection="column" marginBottom={1}>
          <Box>
            <Text bold>
              {LABEL2}
            </Text>
            <Text dimColor>
              {" "}
              {minutes2}
              {` · ${verdict}`}
            </Text>
            <Text>
              {" "}
            </Text>
            <Button label="cancel" dimColor />
            <Button label="clear" dimColor />
          </Box>
          <Text dimColor>
            {split2}
          </Text>
          <Text>
            {summary2}
          </Text>
          <Box>
            <Text color="red">
              {severity4}
            </Text>
            <Text>
              {" "}
              {file4}
              {`:${line_start}`}
              {" "}
              {title4}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Box>
            <Text color="red">
              {severity5}
            </Text>
            <Text>
              {" "}
              {file5}
              {`:${line_start}`}
              {" "}
              {title5}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Box>
            <Text color="red">
              {severity6}
            </Text>
            <Text>
              {" "}
              {file6}
              {`:${line_start}`}
              {" "}
              {title6}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Button variant="primary" label="fix all" />
          <Box flexDirection="column">
            <Text dimColor>
              {output2}
            </Text>
            <Button variant="primary" label="pull into Claude" />
          </Box>
        </Box>
        <Box flexDirection="column" marginBottom={1}>
          <Box>
            <Text bold>
              {LABEL3}
            </Text>
            <Text dimColor>
              {" "}
              {minutes3}
              {` · ${verdict}`}
            </Text>
            <Text>
              {" "}
            </Text>
            <Button label="cancel" dimColor />
            <Button label="clear" dimColor />
          </Box>
          <Text dimColor>
            {split3}
          </Text>
          <Text>
            {summary3}
          </Text>
          <Box>
            <Text color="red">
              {severity7}
            </Text>
            <Text>
              {" "}
              {file7}
              {`:${line_start}`}
              {" "}
              {title7}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Box>
            <Text color="red">
              {severity8}
            </Text>
            <Text>
              {" "}
              {file8}
              {`:${line_start}`}
              {" "}
              {title8}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Box>
            <Text color="red">
              {severity9}
            </Text>
            <Text>
              {" "}
              {file9}
              {`:${line_start}`}
              {" "}
              {title9}
              {" "}
            </Text>
            <Button label="fix" />
            <Text>
              {" "}
            </Text>
            <Button label="dismiss" dimColor />
          </Box>
          <Button variant="primary" label="fix all" />
          <Box flexDirection="column">
            <Text dimColor>
              {output3}
            </Text>
            <Button variant="primary" label="pull into Claude" />
          </Box>
        </Box>
      </Box>
    )
  })

  on('session.start', async ($, e, next) => {
    const message = '…'
    const deny = '…'
    await $.ui.toast(`relay: ${message}`)
    await $.ui.toast(`relay: verify refused: ${deny}`)
    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/relay/hooks/register.tsx lines 188–211 · Band

mods/relay/hooks/register.tsx:188

  on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
    if (e.props.hasSurvey) return next(e)
    const { Box, Button, Text } = $.ui.resolve(e)
    const now = await $.clock.now()
    const running = (await getJobs($)).filter(j => j.status === 'running')

    return (
      <Box>
        <Text dimColor>relay </Text>
        {running.map(j => (
          <Text key={j.id}>
            {LABEL[j.role]} <Text dimColor>{minutes(now - j.startedAt)}</Text>{' '}
          </Text>
        ))}
        <Button key="check" hotkey="c" label="check" dimColor onPress={() => startCodex($, 'check', [])} />
        <Text> </Text>
        <Button key="adversarial" hotkey="a" label="adversarial" dimColor onPress={() => startCodex($, 'adversarial', [])} />
        <Text> </Text>
        <Button key="hand" hotkey="h" label="hand over" dimColor onPress={() => $.prompt.fill({ text: '/relay hand ', mode: 'insert' })} />
        <Text> </Text>
        <Button key="verify" hotkey="v" label="verify" dimColor onPress={() => startVerify($)} />
      </Box>
    )
  })

mods/relay/hooks/register.tsx lines 213–267 · Pane

mods/relay/hooks/register.tsx:213

  on('ui.render', { component: 'Pane', requestId: PANE }, async ($, e) => {
    const { Box, Button, Text } = $.ui.resolve(e)
    const list = await getJobs($)
    const now = await $.clock.now()
    const rows = Math.max(6, (e.viewport?.rows ?? 24) - 6)

    const dismiss = (job: Job, f: Finding) =>
      setJob($, job.id, { findings: (job.findings ?? []).filter(x => x !== f) })

    return (
      <Box flexDirection="column">
        {list.length === 0 && <Text dimColor>No runs yet. Press c, a, h or v in the band, or /relay.</Text>}
        {list.slice(0, 3).map(job => (
          <Box key={job.id} flexDirection="column" marginBottom={1}>
            <Box>
              <Text bold>{LABEL[job.role]}</Text>
              <Text dimColor>
                {' '}{job.status === 'running' ? minutes(now - job.startedAt) : job.status}
                {job.verdict ? ` · ${job.verdict}` : ''}
              </Text>
              <Text> </Text>
              {job.status === 'running' && job.role !== 'verify' && (
                <Button key={`cancel-${job.id}`} label="cancel" dimColor onPress={() => run($, ['cancel', job.id]).catch(() => undefined)} />
              )}
              {job.status !== 'running' && (
                <Button key={`clear-${job.id}`} label="clear" dimColor onPress={() => removeJob($, job.id)} />
              )}
            </Box>
            {job.status === 'running' && job.log && (
              <Text dimColor>{job.log.split('\n').slice(-rows).join('\n')}</Text>
            )}
            {job.summary && <Text>{job.summary}</Text>}
            {(job.findings ?? []).map((f, i) => (
              <Box key={`${job.id}-${i}`}>
                <Text color={/critical|high/.test(f.severity) ? 'red' : /medium/.test(f.severity) ? 'yellow' : undefined}>{f.severity}</Text>
                <Text> {f.file}{f.line_start ? `:${f.line_start}` : ''} {f.title} </Text>
                <Button key={`fix-${job.id}-${i}`} label="fix" onPress={() => $.prompt.submit({ text: fixPrompt(job, [f]) })} />
                <Text> </Text>
                <Button key={`drop-${job.id}-${i}`} label="dismiss" dimColor onPress={() => dismiss(job, f)} />
              </Box>
            ))}
            {job.status === 'done' && (job.findings?.length ?? 0) > 1 && (
              <Button key={`fixall-${job.id}`} variant="primary" label="fix all" onPress={() => $.prompt.submit({ text: fixPrompt(job, job.findings ?? []) })} />
            )}
            {job.status === 'done' && !job.findings && job.output && (
              <Box flexDirection="column">
                <Text dimColor>{job.output.slice(-LOG_TAIL)}</Text>
                <Button key={`pull-${job.id}`} variant="primary" label="pull into Claude" onPress={() => $.prompt.submit({ text: pullPrompt(job) })} />
              </Box>
            )}
          </Box>
        ))}
      </Box>
    )
  })

Licence text (MIT)

MIT License

Copyright (c) 2026 Tuncay Aydin

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 programsreads filesenv varsdrives Clauderemembers

What its code shows

Read from the source at commit 09250f1c3979. 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/relay/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.listed in its repository's .claude-plugin/marketplace.json: installs from there
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/relay/hooks/register.tsx:61 a program named at run time; mods/relay/hooks/register.tsx:109 node (a shell or interpreter); mods/relay/hooks/register.tsx:114 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.agent.spawn, adds command relay, prompt.submit (as the person)
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 (relay) · also: session.start, turn.complete, ui.render (AbovePrompt, Pane) · timers: clock.every
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: SHELL, 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.the prompt box

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.

From its marketplace

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 hal-9/claude-mods

/plugin install relay@claude-mods

/reload-plugins

This installs the marketplace's latest commit, which may not be the one read here (09250f1c3979). Compare them before you install. /reload-plugins loads it into a session that is already open.

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/hal-9/claude-mods

git -C claude-mods checkout 09250f1c3979127c1f0d09c56f61b940accb8e81

claude plugin validate claude-mods/mods/relay

claude --plugin-dir claude-mods/mods/relay

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 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 "hal-9-relay" with its code and make me one like it

Add the ModsCode MCP to Claude or ChatGPT

Similar mods

Badge for your README

If this is your mod, paste this into your README. It links to this page.

README.md

[![ModsCode](https://modscode.com/badge/hal-9-relay.svg)](https://modscode.com/claude-mods/mods/hal-9-relay/)