hermes-agent/ui-tui/src/entry.tsx
Brooklyn Nicholson 3ef6992edf fix(tui): drop main-screen banner flash, widen alt-screen clear on entry
- entry.tsx no longer writes bootBanner() to the main screen before the
  alt-screen enters. The <Banner> renders inside the alt screen via the
  seeded intro row, so nothing is lost — just the flash that preceded it.
  Fixes the torn first frame reported on Alacritty (blitz row 5 #17) and
  shaves the 'starting agent' hang perception (row 5 #1) since the UI
  paints straight into the steady-state view
- AlternateScreen prefixes ERASE_SCROLLBACK (\x1b[3J) to its entry so
  strict emulators start from a pristine grid; named constants replace
  the inline sequences for clarity
- bootBanner.ts deleted — dead code
2026-04-22 15:27:54 -05:00

46 lines
1.6 KiB
JavaScript

#!/usr/bin/env -S node --max-old-space-size=8192 --expose-gc
import { GatewayClient } from './gatewayClient.js'
import { setupGracefulExit } from './lib/gracefulExit.js'
import { formatBytes, type HeapDumpResult, performHeapDump } from './lib/memory.js'
import { type MemorySnapshot, startMemoryMonitor } from './lib/memoryMonitor.js'
if (!process.stdin.isTTY) {
console.log('hermes-tui: no TTY')
process.exit(0)
}
const gw = new GatewayClient()
gw.start()
const dumpNotice = (snap: MemorySnapshot, dump: HeapDumpResult | null) =>
`hermes-tui: ${snap.level} memory (${formatBytes(snap.heapUsed)}) — auto heap dump → ${dump?.heapPath ?? '(failed)'}\n`
setupGracefulExit({
cleanups: [() => gw.kill()],
onError: (scope, err) => {
const message = err instanceof Error ? `${err.name}: ${err.message}` : String(err)
process.stderr.write(`hermes-tui ${scope}: ${message.slice(0, 2000)}\n`)
},
onSignal: signal => process.stderr.write(`hermes-tui: received ${signal}\n`)
})
const stopMemoryMonitor = startMemoryMonitor({
onCritical: (snap, dump) => {
process.stderr.write(dumpNotice(snap, dump))
process.stderr.write('hermes-tui: exiting to avoid OOM; restart to recover\n')
process.exit(137)
},
onHigh: (snap, dump) => process.stderr.write(dumpNotice(snap, dump))
})
if (process.env.HERMES_HEAPDUMP_ON_START === '1') {
void performHeapDump('manual')
}
process.on('beforeExit', () => stopMemoryMonitor())
const [{ render }, { App }] = await Promise.all([import('@hermes/ink'), import('./app.js')])
render(<App gw={gw} />, { exitOnCtrlC: false })