Start with process truths, not just files. We need a written map of the workflow, named systems, and the users who will touch the agent. Then come document packs with owners and effective dates. Policy manuals, order sets, onboarding guides, and FAQ dumps are common starters when the goal is staff support or protocol retrieval. Structured extracts from ticketing or EHR read views help when the goal is status automation. Sample tickets with outcomes let us build evaluation cases that match real work. Quality beats volume. Fifty clean, current protocols outperform five thousand outdated PDFs with mixed access rights. We ask for sensitivity labels so PHI is handled correctly from day one. If you cannot yet de-identify training materials, lower environments stay off full content and tests use synthetic analogs. Identity group lists and role definitions belong in the initial packet because retrieval filters depend on them. Integration assets reduce later thrash. API docs, sandbox credentials, rate limits, and prior incident notes about the interface save weeks. Where fax or email remain critical paths, provide volume counts and example packets. That evidence guides capture design instead of guesswork. Analytics exports showing where time currently burns help codify ROI baselines. Legal agreements sit beside the data. BAAs, data processing terms, and retention rules should be ready before corpora move. If counsel has banned certain model hosts, say so early so architecture does not need a late pivot. Lynchburg teams that prepare this pack shorten discovery and cut change orders. Incomplete packs do not stop us, but they do shift the first weeks into scavenger work rather than building value.