Five fixes in the skillgen fragments (re-rendered): chunk paths now derive from
cwd to match where Part C globs (a non-cwd scan produced "no nodes"); the
code-only fast path writes an empty .graphify_semantic.json so Part C doesn't
FileNotFoundError; --cluster-only relies on the self-contained CLI instead of
re-running Steps 5-9 against deleted intermediate files; and Step 4 runs the
zero-node guard before any write and only writes GRAPH_REPORT.md / analysis when
to_json actually persisted the graph (honoring the #479 shrink-guard).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
