-- Annotations (one row per user per PDF) CREATE TABLE pdf_annotations ( id UUID PRIMARY KEY, user_id UUID REFERENCES users(id), pdf_id UUID NOT NULL, -- static ID for "playground" page_number INT NOT NULL, type TEXT CHECK (type IN ('highlight','note','sketch','tag')), payload JSONB NOT NULL, -- varies by type created_at TIMESTAMP DEFAULT now(), updated_at TIMESTAMP DEFAULT now() );
Post‑MVP (Weeks 7‑12) – Sketch tool, tagging system, advanced analytics, enterprise SSO integration, self‑hosted LLM fallback. | Risk | Impact | Mitigation | |------|--------|------------| | Copyright infringement – PDF not licensed for redistribution | Legal | Use a licensed copy; serve only to authenticated users; embed per‑user watermark; disable native download. | | AI hallucination – Summaries may mis‑represent content | UX | Show “AI generated” badge; provide “Copy original text” link; limit token usage to selected sections only. | | Realtime sync latency – Annotations lag behind | Performance | Use optimistic UI updates; batch writes every 2 s; fallback playground by aron beauregard pdf