Applied AI

Course map · S2 Retrieval and RAG · Episode 8 of 16

Filters, permissions and fresh documents

S2 E8 Explainer · 23 slides · 26 October 2026

  1. Slide 1 of 23, Cover.
  2. Slide 2 of 23, Why it matters.
  3. Slide 3 of 23, Recap.
  4. Slide 4 of 23, Mental model.
  5. Slide 5 of 23, Mental model.
  6. Slide 6 of 23, Live, every question.
  7. Slide 7 of 23, Worked example.
  8. Slide 8 of 23, Worked example.
  9. Slide 9 of 23, The test.
  10. Slide 10 of 23, The test.
  11. Slide 11 of 23, Before the results.
  12. Slide 12 of 23, Finding.
  13. Slide 13 of 23, Finding.
  14. Slide 14 of 23, Finding.
  15. Slide 15 of 23, Finding.
  16. Slide 16 of 23, Where it breaks.
  17. Slide 17 of 23, The decision.
  18. Slide 18 of 23, Where it breaks.
  19. Slide 19 of 23, For engineers.
  20. Slide 20 of 23, For leaders.
  21. Slide 21 of 23, The scoreboard.
  22. Slide 22 of 23, Decision rule.
  23. Slide 23 of 23, Series map.

Lesson notes

Labelling documents for access and version, then filtering before ranking, stopped every staff-only leak, 64 of 480 to none, and lifted right answers from 316 to 359.

Decision rule

Filter by permission and version before ranking, never after, and test that a restricted passage cannot reach the prompt.

Ideas in this lesson

  • Retrieval

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