Documents — QA harness

0. All documents in knowledge base

include archived versions

1. Upload

File (PDF / DOCX / XLSX / TXT) Title (groups versions; same title = same logical doc) Uploaded by (free-form, optional) Confirm new version (required when title already exists with different content)

2. Search documents (description-level — "which doc?")

Query (natural language; multilingual EN/VN) Limit

2b. Search content (chunk-level — "which passage?")

Query (returns matching chunks across all files) Limit

3. List versions (substring match — case-insensitive)

exact match

4. Ask AI — agent answer + cited passages

Question (natural language — agent decides which docs & passages)

Provider: Refinement loop: show reasoning (trace)