Set release boundaries for the project virtualenv

Operational risks for the isolated project venv with pinned pandas center on pip installing from an unpinned URL or committing .venv with credentials, plus the earlier failure mode (pip installing into the system Python, or activating the wrong venv). Safety lives in executable gates, allowlists, redaction, and a named owner—not in a warning paragraph under an unsafe function.

grep -E '^(--index-url|http://)' requirements.txt && echo 'blocked untrusted index' || echo 'no untrusted index'
test ! -d .venv/.git && echo '.venv not a nested repo'

Expected evidence: no untrusted index. A failed assertion means stop, investigate, and do not publish the project virtualenv.

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-virtual-environments.

Write the release blocker as a predicate, not a feeling: “Do not ship the project virtualenv if pip installing from an unpinned URL or committing .venv with credentials.” Pair it with a passing control that shows the reviewed configuration still works for project dir lab-env/ with requirements.txt containing pandas==2.2.2. 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 pip installing from an unpinned URL or committing .venv with credentials.

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 project virtualenv is not shippable without both, even when which python points inside .venv; importlib.metadata.version('pandas') matches pin looks healthy.

At the safety and operations stage for python-virtual-environments, the job is narrower than finishing a product demo. You are creating one progressive evidence piece about project dir lab-env/ with requirements.txt containing pandas==2.2.2 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: record global site-packages pandas version (or absence) before creating the venv.

For this page specifically, success looks like an executable deny gate for the lab-specific threat while still centering the user decision to install project packages without mutating the global interpreter. If you cannot point to a file, command, or assertion that proves that for the project virtualenv, stay on this page instead of advancing.

Set up a virtual environment

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