Set release boundaries for the label file cleaner

Operational risks for the label cleaner writing clean-labels.txt center on writing cleaned labels into a world-writable shared path or reading untrusted paths via ../, plus the earlier failure mode (FileNotFoundError, encoding errors, or accidental overwrite of the source). Safety lives in executable gates, allowlists, redaction, and a named owner—not in a warning paragraph under an unsafe function.

from pathlib import Path
def safe_read(user_path, root=Path('.')):
    path=(root/user_path).resolve()
    if root.resolve() not in path.parents and path!=root.resolve():
        raise ValueError('path escapes root')
    return path.read_text(encoding='utf-8')
print('path gate ready')

Expected evidence: path gate ready. A failed assertion means stop, investigate, and do not publish the label file cleaner.

Name who can disable the feature, what data is retained, and how to roll back to the last known good artifact. Pin the reviewed configuration (versions, thresholds, allowlists) so “what shipped” is reconstructable for python-file-handling.

Write the release blocker as a predicate, not a feeling: “Do not ship the label file cleaner if writing cleaned labels into a world-writable shared path or reading untrusted paths via ../.” Pair it with a passing control that shows the reviewed configuration still works for labels.txt with YES/yes/No/blank lines. Name an owner and a rollback handle (git tag, docs_version, previous image).

Security pages must not paste the happy-path demo. If your gate code looks like the implementation page, replace it with a deny/allow check aimed at writing cleaned labels into a world-writable shared path or reading untrusted paths via ../.

State the data retention rule in one line (what is stored, for how long, who can read it). Then state the kill switch (env flag, config pin, or feature owner). The label file cleaner is not shippable without both, even when source byte-identical after run; clean file has unique lowercase lines looks healthy.

At the safety and operations stage for python-file-handling, the job is narrower than finishing a product demo. You are creating one progressive evidence piece about labels.txt with YES/yes/No/blank lines that later pages inherit without redefining success. Keep that fixture small enough to inspect by hand, keep outputs copy-pasteable as text, and refuse to narrate this baseline as if it were a production SLA: manual unique-lower count of the fixture before coding.

For this page specifically, success looks like an executable deny gate for the lab-specific threat while still centering the user decision to normalize noisy training labels without destroying the source file. If you cannot point to a file, command, or assertion that proves that for the label file cleaner, stay on this page instead of advancing.

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