`.nox` missing from `_SKIP_DIRS` — nox virtualenvs get fully indexed (91% graph noise in a real repo)

[igorregoir-lgtm]

Summary

_SKIP_DIRS in graphify/detect.py includes .tox but not .nox. Repos using nox (the tox successor) get their virtualenvs fully indexed, flooding the graph with dependency noise.

Real-world impact

Windows 11, graphifyy 0.9.11, graphify extract on a Python repo containing a .nox/ env:

• Graph came out with 7,365 nodes — 6,720 of them (91%) sourced from .nox/ (Jupyter nbextensions, pydeck, and other site-packages content inside the nox venv).
• The useful graph was only ~645 nodes, drowned in vendored dependencies.
• Semantic extraction also burned LLM tokens reading venv docs.

Checked master (graphify/detect.py, around the _SKIP_DIRS literal): .tox, .venv, node_modules, .next, .terraform are all there — .nox is not. Since nox is the direct successor of tox and creates .nox/ by convention (same shape of directory tree), this looks like an oversight rather than a decision.

Suggested fix

One line in _SKIP_DIRS:

".tox", ".nox", ".eggs", "*.egg-info",

Workaround (for anyone hitting this)

.graphifyignore at the repo root with:

.nox/

then rebuild (GRAPHIFY_FORCE=1 graphify update . or delete graphify-out/ and re-extract). In my case this took the graph from 7,365 inflated nodes to 628 real ones.