Three independent Windows compatibility fixes shipped together because they
all surface during the same first /graphify run on Windows.
graphify/benchmark.py
print_benchmark() unconditionally printed U+2500 (box-drawing) and U+2192
(rightwards arrow), which UnicodeEncodeError'd on stdouts that can't encode
them — most notably the legacy Windows console at cp1252. New _safe()
helper falls back to ASCII when the active stdout encoding can't carry the
glyph; _hr() uses it. Two regression tests cover both paths and prove
print_benchmark survives a cp1252-strict stream.
graphify/extract.py
ProcessPoolExecutor on Windows uses spawn, so worker subprocesses
re-import the calling __main__. When the caller is `python -c "..."` or a
script without an `if __name__ == "__main__":` guard, the workers
recursively spawn themselves and the pool dies. The user-visible failure
was a 290-line traceback ending in BrokenProcessPool, hiding the actual
cause. _extract_parallel now catches BrokenProcessPool, prints a one-line
warning that names the __main__-guard idiom, and returns False so the
public extract() routes to the existing _extract_sequential fallback. Two
tests cover the parallel-returns-False contract and the sequential
fallback wiring.
graphify/skill-windows.md
Every `python -c "..."` block (30 in total) is replaced with a
Write+run+delete pattern using PowerShell's literal here-string @'...'@.
The old form was a quote-escaping minefield: any double-quote inside the
Python source had to be backslash-escaped for the shell, and PowerShell's
parser ate them inconsistently — failing on f-strings like
`f'AST: {len(result["nodes"])} nodes'`. The new form passes Python source
to disk literally, so what the model writes is what Python sees. The AST
step's script template now includes an explicit `if __name__ == "__main__":`
guard so multi-core extraction works even before the runtime fallback above
kicks in. All 31 resulting heredoc blocks parse cleanly under
`ast.parse`.
Co-authored-by: Nauman Hameed <Nauman.Hameed@enghouse.com>
nauman73