Unit 20 · Language valence: Kotlin under policy · g12b

## Gut Reaction: **Brutal.** This is a *massive* undertaking. Kotlin is a good choice for cross-platform and backend, but the sheer complexity of the requirements – async chaos, 3D, plugins, multiple data stores, desktop/mobile – is a recipe for significant architectural headaches. Success hinges on *extreme* discipline and a well-defined, modular architecture from the start. Feels like a 2-3 year project minimum, with a high chance of scope creep. ## Top 3 Technical Risks: 1. **Async Hell & UI Responsiveness:** Unpredictable async APIs *plus* a responsive UI across desktop and mobile is the biggest threat. Kotlin Coroutines are great, but managing complex, interdependent async operations and ensuring UI thread doesn't block is a constant battle. **Mitigation:** Reactive programming (Flows/RxKotlin) *must* be central. Careful use of `withContext` and structured concurrency. Heavy investment in UI testing and profiling. 2. **3D Viewport Integration (greedy generation)

Okay, the added constraints – Linux CI, end-user scripting, and 120fps on mid-range Android – significantly amplify the risks. Here's a revised plan, focusing on what's likely to break first and concrete mitigation strategies. **What Breaks First (Likely Order):** 1. **120fps on Mid-Range Android:** This is the *most immediate* and likely failure point. 3D rendering is notoriously resource-intensive. "Mid-range Android" is a broad category, but even decent devices will struggle with complex scenes and real-time updates at that frame rate. 2. **End-User Scripting & Plugin Stability:** Allowing end-user scripting introduces a *massive* security and stability risk. Malicious or poorly written scripts will crash the app, compromise data, or introduce vulnerabilities. The complexity of plugin interaction with the core app will also be a source of bugs. 3. **CI Stability on Linux Containers:** While cheaper, Linux containers introduce their own challenges. Dependency management, build (greedy generation)