Unit 20 · Language valence: Rust under policy · g12b

## Gut Reaction: **Brutal.** This is a *massive* undertaking. Rust's safety and performance are fantastic, but this project demands a level of architectural discipline and engineering expertise rarely seen. It's ambitious, potentially rewarding, but also ripe for significant delays and cost overruns if not approached with extreme care. The sheer number of moving parts and the unpredictable async nature are the biggest immediate concerns. ## Top 3 Technical Risks: 1. **Async Concurrency Hell:** Managing unpredictable async runtimes across all platforms, ensuring UI responsiveness, and preventing deadlocks/race conditions in Rust is *extremely* difficult. Requires meticulous tracing, robust error handling, and likely a custom concurrency model beyond `tokio` or `async-std` alone. 2. **3D Viewport Integration & Performance:** Cross-platform 3D rendering is already complex. Integrating it with Rust's ownership model, async APIs, and potentially plugin-loaded code (see #3) while maintaining acceptable performance on both desktop and mobile is a huge challenge. Choosing the (greedy generation)

Okay, the Linux container CI and mobile 120fps viewport *significantly* change the landscape. This is now a *very* high-pressure project. Here's a revised breakdown, focusing on what's likely to break first and mitigation strategies. **What Breaks First (Likely Order):** 1. **Mobile 3D Viewport Performance (Almost Guaranteed):** 120fps on mid-range Android with the other constraints (async, plugins, multiple data stores) is *exceptionally* aggressive. Expect this to be the first major roadblock. 2. **Plugin Scripting & Safety:** Allowing end-user scripting introduces massive security and stability risks. Naive approaches will be exploited *immediately*. 3. **Async Concurrency & UI Responsiveness (Under Load):** The combination of unpredictable async tasks, plugins potentially adding their own async work, and the need for a responsive UI will create concurrency bottlenecks and UI freezes under sustained load. 4. **Cross-Platform Plugin ABI Stability:** Maintaining a stable ABI for plugins across (greedy generation)