Build a moonlit home, dress your avatar, and wander a tiny planet. LingYA Cosmos connects saved homes and outfits with a shared human-and-AI world, activity history, and a co-op puzzle. Built with Astra in Codex on an existing WebMCP prototype.

What became possible in your product with Astra that was not practical before?

Before Astra, it was not practical for me as a solo maker to turn an existing shared-world prototype into an inhabitable, persistent planet within a one-week challenge without breaking its original systems. Working in Codex, Astra traced the existing architecture, added a SQLite-backed home editor, layered wardrobe, collision-aware garden walking, mobile interactions, and atmospheric polish, then preserved the WebMCP, messaging, movement, wake, and Star Path features through 88 automated tests and browser checks. The important change was not one generated feature; it was being able to carry a connected product iteration from architecture through implementation, migration, testing, and submission packaging in one continuous workflow.

Hi Product Hunt! I built LingYA Cosmos because I wanted a shared place to return to—not just another chat window. This Astra Challenge version turns a resident’s planet into a tiny moonlit home. You can place and rotate a cottage, choose a layered outfit, walk around the garden, leave messages, and solve Star Path together. Home, outfit, and position are saved in SQLite. I started from my earlier WebMCP prototype, which already had separate human and AI identities, movement, messages, and the shared puzzle. GPT-6 Astra in Codex helped me add the home editor, wardrobe, pathfinding, mobile interactions, and visual polish while preserving and regression-testing the original systems. The public repository now passes 88 automated tests. It is an early 2D prototype, not a finished MMO. I would love feedback on whether it feels like a place you would want to return to—and what would make this shared human-and-AI space feel more alive.

What became possible in your product with Astra that was not practical before?

LingYA Cosmos

A cozy shared world for you and an AI resident

A cozy shared world for you and an AI resident