Run coding agents in Blaxel sandboxes from Herdr

bl login
bl workspaces --current

herdr plugin install blaxel-ai/herdr-blaxel-sandbox-plugin
herdr plugin list
herdr plugin action list --plugin blaxel.sandbox

herdr plugin action invoke dashboard --plugin blaxel.sandbox

herdr plugin config-dir blaxel.sandbox

{
  "agent": "codex",
  "previewPorts": [3000],
  "publicPreviews": false
}

git clone https://github.com/blaxel-ai/herdr-blaxel-sandbox-plugin.git
example_dir="$(mktemp -d "${TMPDIR:-/tmp}/herdr-invoice-summary.XXXXXX")"
cp -R herdr-blaxel-sandbox-plugin/examples/invoice-summary/. "$example_dir/"
cd "$example_dir"
git init
git add .
git -c user.name="Herdr Example" -c user.email="example@localhost" commit -m "Invoice summary baseline"
npm test
npm start

{
  "count": 3,
  "totalCents": 439550,
  "paidCents": 125000,
  "openCents": 314550
}

herdr plugin action invoke start-agent --plugin blaxel.sandbox

herdr plugin action invoke dashboard --plugin blaxel.sandbox

Add an overdueCents field to summarize(rows, asOf), using an explicit YYYY-MM-DD cutoff date. An invoice is overdue only when it is open and its due date is earlier than asOf. For 2026-09-08, the sample ledger should report 84550 overdue cents. Keep the existing totals unchanged. Update the CLI to use that cutoff date. Add tests for paid invoices, invoices due on the cutoff date, and an empty ledger. Run npm test and npm start, then show git diff.

herdr plugin action invoke dashboard --plugin blaxel.sandbox

import { createServer } from 'node:http';
import { invoices, summarize } from './invoices.mjs';

createServer((request, response) => {
  if (request.method !== 'GET' || request.url !== '/') {
    response.writeHead(404).end('Not found');
    return;
  }
  response.writeHead(200, {
    'Content-Type': 'application/json; charset=utf-8',
    'Cache-Control': 'no-store',
  });
  response.end(JSON.stringify(summarize(invoices, '2026-09-08'), null, 2));
}).listen(3000, '0.0.0.0');

git diff
npm test
npm start