[dem-extra1]

Ezra asked for a 3D plot beside every contour or level-curve plot (example). This covers the contour gaps that the new check-contour-3d caller (#619) does not report, because that check only looks at added lines.

• _fig-contour-line-3d.qmd (new): the bowl g(b, c) = b^2 + c^2 as a surface, with the contour circles at heights 1, 4 and 9 and the two points of the example. R (plotly) and Python (matplotlib) tabs, as in the other 3D figures. It declares its own Python packages so a host site including it needs nothing extra.
• _fig-tilt-a-plane.qmd: needs no change. It already draws the plane in 3D beside its contour map, and editing it would trip the one-div-per-subfile check.
• Not covered: _fig-gradient-explorer.qmd, an interactive OJS explorer of a gradient at a point. A 3D surface there needs a Plotly widget wired to its sliders, which is a design choice for Ezra.

Rendered algebra-exponentials.qmd to HTML locally: the new figure is present and its references resolve.

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🤖 Generated with Claude Code

https://claude.ai/code/session_01FWgYrFvLRB6rfTz2CzRQQz

[github-actions]

Claude finished review — View run

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I fetched PR #622 live with gh pr view. It is open, not a draft and not merged, and its head is 3cd35d59adc1fbdab953339c06cc654b4b9901ea. That is the commit I reviewed, so my review stands.

Verdict

Ready for merge

Structured Review Data (JSON)

{
  "schema_version": "1.1",
  "reviewer": "claude",
  "commit_sha": "3cd35d59adc1fbdab953339c06cc654b4b9901ea",
  "verdict": "CLEAN",
  "findings": [],
  "detailed_assessment": "Commit 3cd35d5 splits the py_require call and the marks tibble into named intermediates in _fig-contour-line-3d.qmd; the values, chunk labels, figure id and fig-alt text are unchanged, so nothing breaks.",
  "holistic_assessment": "The refactor is scoped, follows the no-nested-calls rule, and introduces no regression risk or anchor changes; the page was not rendered, so the build is unverified."
}

Reviewed commit: 3cd35d5

[github-actions]

💰 Cost: $0.2217 (review) — run

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.

_{2026-11-04 02:28 UTC}