[dem-extra1]

Ezra asked for a 3D plot beside every contour or level-curve plot, and answered "daytb" to my recommendation for the gradient explorer: a 3D panel tied to its controls.

• _fig-gradient-explorer-3d.qmd (new): the graph of the function chosen in the explorer, drawn in 3D with a hand-rolled d3 projection, as _fig-tilt-a-plane.qmd does. It shows the chosen point lifted onto the surface, the level curve through it at constant height, and the red gradient and blue step-direction arrows, each rising by its change in f. It reads the explorer's cells, so the same sliders drive it, and has its own "turn the view" slider.
• _sec_vector_calc.qmd: includes the new subfile right after the explorer.

Checked by running the figure's cell under Node with d3 and jsdom for both functions: no NaN coordinates, no empty paths. I did not look at it in a browser. The page rendered to HTML locally.

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Generated by Claude Code

[github-actions]

Claude finished review — View run

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I fetched PR mds#623 live. It is OPEN, not a draft, and not merged (mergedAt is null). Its head is 46ebc3f0db4688b8f60575e8e86a52900af208f4, the commit I reviewed.

Verdict

Ready for merge

My review above stands. 46ebc3f adds one line to the .lintr.R exclusions and nothing else. The prior review also gave Ready for merge.

Structured Review Data (JSON)

{
  "schema_version": "1.1",
  "reviewer": "claude",
  "commit_sha": "46ebc3f0db4688b8f60575e8e86a52900af208f4",
  "verdict": "CLEAN",
  "findings": [],
  "detailed_assessment": "The commit 46ebc3f adds the gradient-explorer-3d subfile to the .lintr.R exclusions with the same Inf form as its siblings, and the path matches an existing file.",
  "holistic_assessment": "The change is a one-line config addition with no prose or math, so there is no regression or scope concern beyond the unrendered page."
}

Reviewed commit: 46ebc3f

[github-actions]

💰 Cost: $0.2029 (review) — run