chaf

Games and everyday software, made in Vietnam with AI agents at the bench.

Chaf is a small studio building a cultivation sandbox game and a handful of Windows and web tools that people use every day.

See the game Our products

Tàn Đăng Vấn Đạo

The Last Lantern

An offline cultivation sandbox for Windows and macOS. Everyone on Hằng Thổ believes their world is eternal. The lantern burning at its core says otherwise, and it is running low.

  • A whole planet to walk

    Seven regions crossed on foot, by teleport array or in flight once your spirit allows it.

  • Mortal to Hóa Thần

    Cultivate, break through realms, learn techniques, refine pills and raise your own artifacts.

  • Real-time combat

    Fight through secret realms and defend your cave abode or sect against multi-phase bosses.

  • A lineage, not a hero

    When a lantern-bearer dies the flame passes on. Five endings, each reachable in every seeded world.

Engine Godot 4 with a C# simulation core Languages Vietnamese first, full English Status First Windows demo in internal testing
Character creation screen: an ink-painted portrait of a young cultivator beside cards for choosing his background and starting traits.
Character creation, from the current Windows demo build.
Hand-painted ink map of Thanh Khê, with mountains, forest, a river and the coast.
Thanh Khê, the starting region.
Closed-door cultivation screen with a meditating figure in a dark cave and a glowing spirit core.
Closed-door cultivation.
Top-down real-time combat in a secret realm: the player faces a giant centipede on a cracked stone floor.
Real-time combat in a secret realm.

Tools we ship

Small, focused apps that started as something we needed ourselves. Most are free and open source.

  • My Translator Windows desktop

    Real-time speech translation for meetings and videos. Runs on your machine with your own API keys and no server in between.

    GitHub

  • FKey Windows input method

    A fast Vietnamese keyboard for Windows with a Rust typing engine and a lightweight tray app.

    GitHub

  • LightShot for Windows Screen capture

    Screenshots and screen recordings with a quick editor, rebuilt for Windows from an open-source macOS app.

    GitHub

  • Xóm Học Trò Web, for kids

    English practice for primary-school children in the browser, narrated in Vietnamese and English.

    Open

How a small studio ships this much

We direct a team of Claude Code agents through our own orchestrator. People decide what to build and sign off on every release; agents do the planning, coding, testing and review in between.

  1. Plan with a thinker

    Hard questions go to a reasoning-focused agent that writes the plan and acceptance criteria before any code exists.

  2. Build in parallel

    Separate workers implement, fix and handle git across projects, each in its own pane with clear file ownership.

  3. Prove it before merge

    Tests, builds and a review pass run on every change. Anything a machine cannot see goes to a human checklist.

  4. Release by hand

    Nothing is published or pushed without a person saying so.

Want to play the demo or talk about a project?

Write to us. We read everything and usually reply within a day.

canh.nguyen@chaf.site