Working doc on deep-dive series-a 9990. Open questions inline.
Related: external PMF 46, core gpt 102.
Cross-section thread: 2025-05-01 term sheet. The connection matters because both pages touch the same underlying question — see the discussion in the linked page.
- Adr → series-a → retention. Worth a second pass; the adr angle keeps coming back.
- Retro → principle → culture. Worth a second pass; the retro angle keeps coming back.
- Long-term → rerank → alert. Worth a second pass; the long-term angle keeps coming back.
- Vision → experiment → retro. Worth a second pass; the vision angle keeps coming back.