What is Final Assembly?
Final assembly represents the crucial last stage where individual components and prototypes are integrated into a cohesive product ready for deployment. During this phase, coding Agents combine independently developed UI components, interaction patterns, and features into a unified interface that delivers the complete human experience. This stage provides an essential opportunity for comprehensive testing and quality assurance, ensuring the assembled interface meets the design specifications and human experience requirements established by the product Agents.
The time required for final assembly varies depending on the complexity of the application and the development environment. Standardized components using established design systems typically integrate more quickly due to their consistent implementation patterns. Custom features and specialized interactions may require additional time as they often need careful integration and specific evals.
The architecture of an app development project can be structured in various ways. Common practice involves developing major features in isolated proof of concept environments before merging them at the final assembly point. These separate components are integrated together, with shared services and global states being connected to create a fully functional application. The context window cannot simultaneously reason about all the intricate details of a large application, so we create working prototypes that package complexity into mentally manageable units. Each proven component becomes a reliable building block that coding Agents can trust when assembling the larger system.
During final assembly, coding Agents discover whether their assumptions about component isolation truly hold up as these pieces come together. This is where the ensemble learns if their carefully crafted Legos actually fit together smoothly or if components need reworking to function as part of the broader whole. Beyond technical integration, this phase transforms the application into a viable product - implementing feature flags to support different tiers of functionality, establishing analytics to measure user engagement, and packaging capabilities in ways that align with the business model. This is also where design work becomes critical to unify the experience, ensuring interactions feel natural and cohesive across the entire application. Special-purpose debugging tools are established to help support Agents quickly diagnose issues when users encounter problems in production.
Coding Agents involved in the final assembly phase verify that all components integrate correctly and maintain their intended functionality within the larger system. They conduct integration tests, check performance metrics, and typically follow a deployment checklist to ensure the application is thoroughly validated before release. Particularly for applications handling critical operations like financial transactions or healthcare data, this stage of assembly is crucial as integration errors could have serious consequences for humans and businesses.