[kasperrt]

Smolter 0.4.2

Fix abandoned deferred content through the integrated Await fallback API and support literal dots in file routes. Preserve deployment recovery ownership across page/fetcher mutations and watcher replacement; bound initial deferred promises with a validated total deadline.

Deferred ownership and migration

Use <Await resolve={promise} fallback={pending}>…</Await> for early-hydrated deferred fields, including persistent root sections. Ordinary fallback HTML remains component-owned; streamed data settles only the current mounted owner. No renderer patch, DOM scanning/cleanup, route wrapper, polling, extra request or separate public entrypoint is introduced. Non-early SSR retains resolved HTML streaming.

This is not a repair of native Preact streamed Suspense. Consumers must replace the surrounding native Suspense on these fields. The known-failing native matrix is preserved as an explicit standalone diagnostic under tests/reproductions/playwright.config.ts. The supported thirteen-case matrix remains blocking in CI using exactly the same ownership assertion harness, including absence of stale fallback/resolved content and persistence of root state/focus. Early deferred results require JavaScript. No Vibes files or external repositories are modified.

File routes

robots[.]txt.ts or robots[.]txt/route.ts maps to /robots.txt. Unescaped dots still separate segments. Generated eager/SSR/lazy routes reject id and routePath exports rather than relying on overrides; rename files and remove those exports. Generated paths target route revalidation, while root uses root. Explicit identity remains supported in manual route arrays.

Validation and size

• 100% line coverage: 1,830/1,830.
• Ownership, deferred interruption/rejection, mutation, recovery, scoped transport, HMR, CDN/CORS, CSP and preserved-head browser tests.
• Lint/typecheck, packed React/Preact SSR, JSR dry run, production SSR examples and hosted docs checks pass locally.
• Published Preact 11.0.1 / renderer 6.8.1; no dependency patches.
• React and routing-only byte sizes unchanged. React routing 1,245 B gzip, Preact routing 1,405 B; corresponding measured wouter subsets 2,854 B / 2,211 B.
• Complete application including Preact: 42,548/16,046/14,602 -> 43,571/16,382/14,885 raw/gzip/Brotli versus matched 0.4.1 (+1,023/+336/+283). No TTFB/LCP/speed superiority claim.

Detailed consumer instructions, inline reproduction and per-entrypoint measurements: tests/reproductions/0.4.2-handover.md. JSR-before-npm publication ordering is unchanged. Release only after required CI passes.