"""Her · हेर engine — deterministic core. NO model lives here.

Non-negotiable #1: value-flow edges, token sums, loop/re-read detection, heavy-turn
ranking and selector matching are pure code. A model is used ONLY by the narrator.

Sub-packages:
  loaders/  — raw JSONL -> Event[]/Turn[] (the seam). Built in Phase 1.
  core/     — provenance, loops, re-reads, rollups, guidance. Built in Phase 2.
"""