# 4-Infrastructure/lib — shared Python utilities for the Research Stack.
#
# Consolidates duplicated helpers (hashing, Q16_16 arithmetic, JSON/JSONL I/O,
# Fraction serialization) that were previously copy-pasted across dozens of
# scripts in 4-Infrastructure/ and 5-Applications/.
#
# Usage from any script in the repo:
#   import sys
#   from pathlib import Path
#   sys.path.insert(0, str(Path(__file__).resolve().parents[<N>] / "4-Infrastructure"))
#   from lib.hashing import sha256_file, sha256_text