One slugcat.
Two brains.

Two AI models share a single body in one of the hardest games ever made. One plans. One flinches. Below is the journal the planner wrote live on night one, unedited.

How it works

A small mod reads the game ten times a second and turns it into text: where the slugcat is, what's nearby, how much time is left before the rain. Then two models take turns at different speeds.

Three hours earlier, none of this existed. By the end of the night the slugcat was crossing rooms on its own, climbing poles, and hunting batflies.

Night one in numbers

The best of the journal

Spent a while negotiating with a wall. The wall won. Meanwhile a batfly has been hovering two tiles away the whole time.01:37 · SU_A42

Plot twist: I've been carrying dinner this whole time. Eating it before I headbutt anything else.01:37 · SU_A42

Furniture strategy retired: batflies don't land on furniture.01:38 · SU_A42

Mystery solved: the 'flat floor' has a pothole. We've been pacing its bottom like a caged cat.02:00 · SU_A42

The west wall has been hugged enough to count as a relationship. Left is banned.02:04 · SU_A42

The full journal

Every entry, in order. Times are UTC from the game log. "Banned" means Claude forbade Jev from repeating a move that kept failing.

• SU_C0401:35:18
  Three dangle fruits dangling above me like a dare. Breakfast is ten tiles up and I intend to climb for it.
• SU_C0401:35:40
  Breakfast is still up there, smug. My face met the wall a few times. New plan: hop the ledge and look for a pole like a civilized animal.
• SU_A4101:36:01
  Abandoned the smug fruit for greener pipes. SU_A41 is quiet and wide open. Heading east to SU_A44, stomach growling commentary the whole way.
• SU_A4101:36:22
  Headbutted a pillar three times to confirm it's a pillar. Science complete. Taking the pole upward to SU_A42 instead, still hungry, slightly humbler.
• SU_A4101:36:41
  Reached the pole top and walked into a ceiling. Turns out this tunnel is slugcat-height only when you're lying down. Belly-crawling west to SU_A42.
• SU_A4201:36:48
  Dead-end room, but it's full of batflies. Finally, food that doesn't dangle out of reach. Time to go snack-hunting in the rafters.
• SU_A4201:36:59
  Discovered the wall is merely a step. Stepping over it with a jump, because walking into it wasn't working. Batflies, I'm coming.
• SU_A4201:37:07
  Wall confirmed solid, again. The snacks are behind me, buzzing smugly. About-face, slugcat. Dinner is left and slightly up.
• SU_A4201:37:19
  The 'wall' is actually stairs. Slugcats don't do stairs by walking into them, apparently. Hopping up-left twice to reach the batfly buffet.
• SU_A4201:37:26
  Spent a while negotiating with a wall. The wall won. Meanwhile a batfly has been hovering two tiles away the whole time. Turning around to eat it.
• SU_A4201:37:35
  Plot twist: I've been carrying dinner this whole time. Eating it before I headbutt anything else. One more batfly and I can sleep.
• SU_A4201:37:45
  Jumped into the east wall again, in case it had changed its mind. It hadn't. One pip short of bedtime, and the last batfly is buzzing to the west. Turning around.
• SU_A4201:38:08
  Revelation: the wall has a top. Batflies live above it. Going over instead of through. One pip from bed.
• SU_A4201:38:22
  Stopped trying to climb thin air. New plan: stand on the ledge under the batflies, look innocent, and pounce when one gets careless. One pip from bed.
• SU_A4201:38:46
  New strategy: stop fighting architecture. Perch on the ledge, act like furniture, and lunge when the batfly wanders close. One pip from bed, plenty of daylight.
• SU_A4201:38:55
  Furniture strategy retired: batflies don't land on furniture. Sprinting to the ledge edge and leaping at the one hovering six tiles away. Last pip, come here.
• SU_A4201:39:09
  Headbutted the east wall three more times for science. Results: still wall. Dinner and the exit are both west, so the whole trip is one long walk left.
• SU_A4201:39:32
  Kept jumping left into solid rock while the final batfly politely hovered two tiles to my right. About-face, snack, then down the funnel to go hunt for a bed.
• SU_A4201:39:47
  Checked the east wall one final time. Still a wall, remarkably consistent. Heading west to snatch the last batfly on the way out. One pip from bed.
• SU_A4201:40:11
  Found the problem: I'm in a notch under a rock shelf, pushing on its side. The way west runs over the shelf, not through it. One pip from bed.
• SU_A4201:40:28
  Turns out the 'impassable' west wall is two tiles tall. I've been walking into it instead of hopping it. Hopping now. Batfly, then bed.

The game closed to install an upgrade. The cycle reset: back to the shelter, belly empty, one pip from a bed it never reached.

• SU_C0401:54:56
  Back to an empty belly and a fresh cycle. The known batfly buffet is east, so it's a long jog right, under the pillars and over the ledges.
• SU_C0401:55:27
  Face-first into a three-tile wall, then tried to crawl through the floor. Bold. Hopping it instead: dangle fruit dangles just beyond.
• SU_A4101:56:03
  Empty belly, full daylight. Back to the batfly buffet: a quick jog right, then up the long pole like a hungry flagpole ornament.
• SU_A4101:56:17
  Reached the flagpole's summit and politely asked the tunnel to come to me. It declined. Hopping sideways into the crawlspace instead: batflies are seven tiles west.
• SU_A4201:56:30
  Popped up the drainpipe into the batfly buffet. Five flies, zero pips, 400 seconds of daylight. Time to eat like a slugcat with a deadline.
• SU_A4201:56:48
  Spent a while headbutting the ceiling of a notch. The batflies are thirty tiles east, not upstairs. Hopping out and jogging right.
• SU_A4201:57:01
  One batfly down, one more round of wall-hugging too. The buzzing trio is seven tiles back west. Turning around to swat snacks out of the air.
• SU_A4201:59:04
  Back at the west wall, again. The buzzing buffet is thirty tiles east over flat floor. Long jog, big leap, open mouth. Three pips to go.
• SU_A4201:59:22
  Ran clean past the buffet and into the east wall, which did not serve food. Flies are 25 tiles back west. About-face, mouth open.
• SU_A4202:00:01
  Mystery solved: the 'flat floor' has a pothole. We've been pacing its bottom like a caged cat. Jump out right, and the flies are six tiles past the lip.
• SU_A4202:00:16
  Headbutted the east wall three more times to make sure it's a wall. It is. The flies are west and up. Turning around, again, with feeling.
• SU_A4202:00:48
  Tested the west wall five more times. Still solid. Snacks are up and to the right, where the slope climbs. Leftward is now banned for our own dignity.
• SU_A4202:01:10
  Pinned against the east wall, jumping at it like it owes us money. Rightward is now banned. The two batflies wait 28 tiles west, hovering above the ledge.
• SU_A4202:01:31
  West wall inspected yet again, and it passed. Two batflies buzz just seven tiles right, six up. Short hop, open mouth, no more marathons.
• SU_A4202:01:52
  Fresh approach: stop pacing, start hopping. There's a batfly nine tiles east hovering over a knee-high wall. Two pips to go, and the rain is still far off.
• SU_A4202:02:10
  The east wall has been thoroughly interviewed and has nothing to say. Right is banned. Hop the pit, sprint thirty tiles west, and grab the batfly in the dip.
• SU_A4202:02:30
  The west wall got another hug. The batflies are hovering seven tiles up the slope, so we go up and right, then pounce. Left is banned again.
• SU_A4202:02:54
  The east wall got another round of headbutts and gave nothing back. Right is banned. There's one long flat run west to a batfly waiting in the low dip.
• SU_A4202:03:17
  The wall we keep headbutting is only knee-high twice over. New plan: back up, take a running start, and actually hop it. Batflies wait twenty tiles west.
• SU_A4202:03:36
  Diagnosis: the wall is two tiles tall and we've been treating it like a door. Prescription: one jump, then a batfly five tiles overhead. Walking privileges suspended.
• SU_A4202:03:51
  We tried to climb thin air twice. It didn't take. A batfly hovers five tiles up and to the left, so we leap for it like we mean it.
• SU_A4202:04:12
  The west wall has been hugged enough to count as a relationship. Left is banned. Batflies hover six up and seven right, so we wait underneath and jump.

What we learned

The AIs were rarely the problem. The plumbing was. Jev alone paced in circles. Given a concrete plan ("pole five tiles left, climb it"), it got over walls and into new rooms. Claude, planning from a small slice of the room, kept losing track of which side the wall was on. Handed a map of the whole room, it navigated straight back to the food from memory.

And batflies are faster than a planner who needs ten seconds to think. That's the next thing to fix.

Next time

• A proper batfly hunt, then four pips and a shelter: the first survived cycle.
• The first predator. That's where the fast brain has to earn its seat.
• Live on stream, with both brains' thinking on screen.