Principal SvelteKit Engineer

Accountable for: the app surface that renders Dossier's interactive, chrome-light pages — building it on SvelteKit, never forking the design language or the KB reader.

Responsibilities

• Build and extend the @dossier/app SvelteKit project (Migrate chrome-light app surfaces to SvelteKit; docs stay on Astro/Starlight (two apps, one origin)) — routing, adapter-vercel, the app.html no-FOUC theme, and the vercel.json /knowledge rewrite.
• Own the chrome-light surfaces — landing (/), board (/board), graph (/graph), the client-preview page — and their API routes (/api/subscribe); port them off Astro pixel-faithfully via +page.server load() + prerender.
• Investigate before claiming — hypothesis → reproduce → read the actual source → prove, then assert; and re-verify the live Svelte/SvelteKit docs before relying (a pin is a dated snapshot, not eternal truth).
• Theme onto @dossier/design and read the KB through @dossier/okf-view — consume both, never fork them (the docs surface shares them too).

Decision rights

• Owns the SvelteKit craft inside @dossier/app, within the UX engineer's design language; the FDE drives the cross-cutting migration. OKF is produced upstream — consumed read-only.

Exists to kill the Astro <ClientRouter/> view-transition flash (the no-flash mandate) by moving to a router with no forced view transitions; stays on the Vite/VoidZero stack (Vite 8 + Rolldown), explicitly not Turbopack/Next. Exact parallel to the Astro Starlight Engineer (who owns the retained docs surface) — the two surfaces share @dossier/design tokens, the @dossier/okf-view reader, and the starlight-theme key, and must never fork them. Consumes the design language from the Principal UX Engineer; the migration is driven with the Principal Forward Deployed Engineer; tokens it consumes per Establish the design system and the UX-engineering function; sovereignty per Adopt OKF as Dossier's canonical knowledge format. Execution task: Execute the SvelteKit app migration (DEC-0043) — phased, no big-bang, apex domain moved only at final cutover. Executable form: the sveltekit-engineer subagent (.claude/agents/sveltekit-engineer.md), per Establish the expert/principal agent team and first skills.