S8: Release 2.0.0 — to_dataframe and the dataframe extra removed

[Polichinel]

Epic: #66 · Wave 4 · Blocked by: S7 (#63) · MAJOR bump under ADR-022 §5

The work

As S6, with: pyproject.toml:3 → 2.0.0; ## [2.0.0] — YYYY-MM-DD with ### Removed and the migration; ADR-022 §7 checklist — rule 2: yes, to_dataframe removed, the DeprecationWarning shipped in 1.1.0 (cite the section); previously-accepted input fails: yes, to_dataframe callers and [dataframe] installers, migration stated, consumers notified before the tag (views-reporting must widen <2.0.0 before they can resolve — S9; vpc's tripwire is their cue — S10); version bump matches the change class; MetricFrame format unchanged. Register dated block. The 2.0.0 section must not reuse the 0.5.0 table header or "For the … rows" phrasing. Tag, publish (gated), back-merge.

Acceptance criteria

• CHANGELOG-section guard red before, green after
• Publish workflow green including tests; PyPI shows 2.0.0
• main back-merged; register updated
• views-reporting and vpc notified before the tag, with S9/S10 linked

Validation

grep -n '^version' pyproject.toml; grep -n '^## \[2.0.0\] — ' CHANGELOG.md
conda run --name views_pipeline pytest tests/ -q; bash documentation/validate_docs.sh
gh release view v2.0.0 --json isDraft,publishedAt

[Polichinel]

Status 2026-09-18 — everything except the publish click is done.

• Release PR release: 2.0.0 — to_dataframe() and the dataframe extra removed (#72) #84 (release/2.0.0 → development): fifteen max-review findings and five weak guards from the independent audit closed, each re-verified red; merged.
• Release 2.0.0 #85 (development → main) merged; tag v2.0.0 = 3332a0f, pushed.
• GitHub Release v2.0.0 is a draft — publishing it triggers publish_package.yml, which runs the full suite before poetry publish. The maintainer presses publish (irreversible).
• Back-merge main into development after v2.0.0 #86 back-merged main into development.
• ADR-022 §3.2 notifications posted before the tag: views-pipeline-core#515 (comment 5733334619), views-reporting#289 (comment 5733334868).

Closes when the publish workflow is green including the test job and PyPI shows 2.0.0.

🤖 Generated with Claude Code

[Polichinel]

Published 2026-09-18 21:27 UTC. Publish run 35396893934: test / test first (runtime-only probe evaluated and emitted with pandas and scikit-learn removed; 993 passed, 1 skipped — the sibling-checkout guard; validate_docs.sh passed), then publish uploaded views_evaluation-2.0.0 sdist and wheel. PyPI reports 2.0.0 with requires_dist = numpy, scipy, and views-frames under the frames extra — no dataframe extra, no pandas, no scikit-learn.

All acceptance criteria met: CHANGELOG guard red before, green after; publish green including the test job; main back-merged (#86); register updated; both consumers notified before the tag. The pandas-free epic's library work is complete; S9 (views-reporting) and S10 (vpc#515) remain.

🤖 Generated with Claude Code