Port

Port had never been a hatchling or a foundling or anything with a childhood, because Port was a doorway, and doorways don't have those. But Loop remembered the first program he ever wrote that couldn't connect, and that memory sat in him like an ache.

He'd been small. He'd built a calculating engine out of string and gears, and it worked — it truly worked, chewing through sums faster than he could — and he'd stood beside it for an hour, thrilled and then, slowly, hollow. Because there was no way to ask it anything. No way for it to tell him a single answer. It just spun, sealed, keeping every result to itself.

"I felt like I'd made a friend who couldn't hear me," he'd told the class once, quietly, not looking up. "All that cleverness, and it was stuck inside, and I was stuck outside, and there was nothing between us."

The next thing he built had a slot. Just a slot — somewhere to drop a pebble in, somewhere for a pebble to roll out. It barely did anything. But when he dropped a stone in and a stone rolled out the other side, changed, because of him — the hollow feeling went away. Not because the engine was smarter. Because it could finally reach him back.

That slot grew up into Port. The whole idea of it is the width of that ache closing: a way in, a way out, and no more being alone on either side of the wall.

So when Loop came to the workshop to teach, he brought the doorway with him and set it right in the middle of the floor, where nobody could pretend it was furniture.

The old caretaker of the workshop watched him wheel it in. "A door with no house," she said. "What does it do?"

Loop didn't explain. He knelt, pressed a key, and let the keystroke slide in the IN slot. He waited — you always wait, at a doorway — and out the OUT slot came the word `hello`, sliding onto the screen. Then he plucked a covered light-sensor off the bench and held it to the IN slot; when he cupped his hand over it, a shadow-reading slid in, and out the other side came a command that flicked a small lamp on.

"World comes in this side," Loop said, standing. "Answer goes out that side. That's all it is. It doesn't think. It doesn't decide. It just refuses to let the program be sealed off."

The caretaker looked at the little lamp, glowing because a hand had passed over a sensor across the room. "Keep it," she said. "It belongs here."

Bit's turn came on a grey afternoon, when a kid slumped at the bench, sure the robot was broken. "It runs," the kid said, "but it just... ignores me."

"It can't hear you yet," Loop said. "It has no doorway. Let's give it one." He set Port beside Bit and wired the two together. "Now — tell Bit to ask your name."

The kid typed the instruction. Bit sent a question OUT through Port, and the words appeared on the screen: `What's your name?`

"Now answer it," Loop said.

The kid typed `Sam`. The letters slid IN through Port and dropped into a little box Loop called a Stash, where the program could hold onto them. Then Bit sent something back OUT: `Hi, Sam!`

Sam stared at the screen. "It... knows me."

"It read you," Loop corrected gently. "IN through the door. Then it answered — OUT through the door." He clipped the light-sensor onto Bit and set it on the bench. "Cover it."

Sam cupped a hand over the sensor. The dark reading came IN; a command went OUT; Bit's tiny lamp blinked awake under the shadow. Sam laughed — a real, surprised laugh — and did it again, and again, hand over sensor, lamp on, hand away, lamp off, the robot answering every single time.

"An hour ago it was sealed shut," Loop said, watching. "Now it's reading the actual world and answering it back. Nothing about Bit got smarter. It just stopped being alone."