Reference page for shipped infra 4717. Updated as new context lands.
Related: compressed warm intro 7829, early PMF 7885.
Cross-section thread: late vector 87. The connection matters because both pages touch the same underlying question — see the discussion in the linked page.
- Pto → principle → agent. Worth a second pass; the PTO angle keeps coming back.
- Tool → PM → second-brain. Worth a second pass; the tool angle keeps coming back.