Devlog

From the build

What shipped each week, in the team's own words. Posts are drafted from the #4xciv channel and the commit log, then reviewed and edited by the people who did the work.

auto-drafted from #4xciv · reviewed by humans

Fifteen days of night, then this: the Moon walkabout trailer

Six cuts in one day: a sunrise-to-sunrise walk through lunar night at the real Apollo 15 Hadley site, a narration bake-off across five local voices, and the logo that came out of the same week.

The sky fills up: satellites, Everest, and 27 leap seconds

Satellites phase 1 plots a real October 3 snapshot of every tracked satellite, color-coded by type. Everest and the Alps become the first real-Earth terrain sites, and the clock now renders every historical leap second.

Lagrange points, a Europa eclipse, and sunset on Jezero

Barycenters and Lagrange points land for the inner system and Earth-Luna. Then a black dot on Jupiter turns out to be Europa's shadow, and Jezero gets a sunset with real scattering.

Radiators, thrusters, and the Iuventius Pup

Stormy's ships get folding radiator vanes and a full drive cycle. The lore: liquid-metal coolant at 1000–1800 °C, because real spacecraft have to shed waste heat.

explore.4xciv.com is live

The Atlas, stripped of game mechanics and the passphrase, so the solar system can be shared with scientific communities. It started from a side-by-side of the Sun from Earth and from space.

Autopilot flies anywhere

Autopilot computes real transfer windows with wait, burn and course-correction steps, and can fly from any body to any other. Mars to Jupiter took almost six years of sim time.

21 to 37: the moons arrive

Io, Ganymede, Callisto, Titan, Enceladus and the rest ship with real imagery. Where probes never looked, a seeded fill stands in, and one toggle shows you the gap.

Subagent bake-off: $38.44, $46.29, and $0.23

The same ticket, three agents: Opus 5, Sonnet 5, and a self-hosted DeepSeek V4.1 Flash. Opus's own code review graded the $0.23 run an A.

Boots on the ground at Jezero and Hadley

Descents from orbit to the Jezero Crater floor and to the Apollo 15 site, on real height data. Same day: Jupiter's cloud bands, Saturn's rings, and Deimos meshed.

Colony building works end to end

"It is hella buggy, but can place down 3 different buildings and they persist and you can craft with them." Three hex plots at Jezero Delta, live Harvest Ice and Mine Regolith recipes.