I am just a number, at the edge of your frame

A product of the math, with a polynomial name

You hold the vital letters, of a heartbeat's desperate scrawl

I'm the constant at your stern, as through the fiber we crawl

Through copper veins and switches, in their cold and humming glow

I stand guard for the chaos that only bit-flips know.

Handshake, header, sequence clear

Routers whisper in my ear

And if the cosmos trembles, and a 1 becomes a 0,

I'll sound the alarm, I'll be your hero.

So sleep, little payload, push through the night

I'll cradle your truth in the jitter and light

If noise paints the sky with a rogue, blue spark

I'll sing you home from the labyrinth dark

ACKs in the distance, like a bell they ring

I'm your checksum lullaby. Hush now. Send.

You've got postcards of a sunrise, in your tiny, bright bytes

A "made it home safe" through the city's red lights

The map to a future where two lives begin

A joke to make someone's slow Monday grin

I'm the silent remainder, a vow beneath your skin

A whisper in the wire: "If you fall, we resend."

TTL is fading, hop by hop

Winds of data, never stop

I'm Parity's cousin and Hamming's true friend

I am the line where the falsehoods end.

So sleep, little payload, push through the night

I'll cradle your truth in the jitter and light

If noise paints the sky with a rogue, blue spark

I'll sing you home from the labyrinth dark

ACKs in the distance, like a bell they ring

I'm your checksum lullaby. Hush now. Send.

And if the static's needles try to scar your name

If lunar tides should pull on the backbone's chain

If a cosmic ray should pluck your bit out of tune

I'll raise a flag to the lossless moon!

A NACK in the doorway, we simply retry

There's no shame in the loop; we refuse to lie.

Hush now, header...

Hush, tiny fields...

Silence the fear the night conceals...

Across the dark water, and the humming stone...

Every true message... finds its way home...

[Final Chorus] (More powerful, building to a crescendo)

So sleep, little payload, though the storms ignite!

I will count you and carry you back to the light!

Through every router, 'til you safely land

I'll hum your checksum, hand in hand!

ACKs are our beacons, end to end

I'm your faithful lullaby! Hush now... Send.

And when the dawn finds your story, safe and intact...

Remember the quiet ghost, who watched your back...

A small, silent remainder, steady to the end...

Checksum sings... receive... and send.