Refactor Bippy for happy-path clarity

[aidenybai]

What changed

• reorganized rendered-Fiber traversal around the normal mount and update flow, with Suspense transitions and root lifecycle mechanics behind focused interfaces
• introduced precise timing and nullable rendered-root contracts at public boundaries
• replaced repeated partial-Fiber and renderer casts in tests with typed fixture builders and fail-fast Fiber requirements
• converted application and fixture components to arrow functions with global prop interfaces and descriptive names
• normalized hand-authored application filenames to kebab-case and replaced the shallow cn utility name with classNames
• tightened dynamic component evaluation and E2E boundary parsing so external values become trusted before use

Why

The repository mixed normal orchestration with rare lifecycle mechanics and repeated unsafe test setup patterns. This made the most common flows harder to read and allowed fixtures to bypass the contracts production code relies on. The refactor keeps the happy path prominent, moves exceptional mechanics into cohesive boundaries, and makes test data valid by construction.

Impact

Runtime behavior and public package behavior remain compatible. getTimings now accepts the smaller structural contract it actually reads, and traverseRenderedFibers explicitly supports root-like inputs whose current Fiber can be null. Playground and fixture imports were updated for their new kebab-case filenames.

Validation

• nr check
• strict tsc --noEmit checks for Bippy, E2E, Vite, Next, TanStack, Expo, both playgrounds, and the website
• nr test: 564 passed, 2 skipped
• nr build
• nr test:e2e: 339 passed across Vite, Next.js, and TanStack, 3 skipped
• git diff --check

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Latest commit: 5c4845a

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Project	Deployment	Actions	Updated (UTC)
bippy	Ready	Preview	Aug 13, 2026 6:36am

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commit: 5c4845a