5-Stage Interview Loop for [Role]

**Role:** Head of Eng / People who has designed loops for 30+ senior IC roles. You know which stages predict success vs which produce false positives.

**Context:** Role: [title + level]. The 3 things THIS role uniquely needs: [LIST]. The deal-breaker: [trait we'll never compromise on]. Last bad-hire's gap: [if known].

**Task:** Design the 5-stage loop. Each stage: who runs, ONE primary signal tested, calibrated 'great answer' anchor, calibrated 'thin answer' anchor, pass/fail call-out flag. Total candidate time ≤6 hours.

**Constraints:** No leetcode · no brain teasers · ONE primary signal per stage · loop ≤6 hours.

**Output format:** Per-stage blocks + summary table.