# peewee diamond recursion scan — CLEAN

Scanned: 2026-03-29
Scope: diamond recursion / CWE-407 in ORM dependency graph traversal

## Files checked

- `peewee.py:7395 sort_models()` — DFS over model dependency graph using `seen` set
  (`if model not in seen: seen.add(model)`). O(1) visited check per DFS step. Clean.
- `peewee.py:7177 Model.dependencies()` — BFS with `seen` set for backreference traversal. Clean.

## Verdict

CLEAN. Both `sort_models` and `dependencies` use Python `set` for O(1) visited
tracking. No diamond recursion (unbounded revisiting) pattern.
