reprexes: port review-driven fixes from lab-manual PR #282

[d-morrison]

Why

The reprexes skill landed upstream here before UCD-SERG/lab-manual#282 finished its review rounds. Five improvements developed on that PR's branch never reached this copy. Since lab-manual reads the skill through the .ai-config submodule (.claude/skills → .ai-config/skills), this stale copy is what collaborators and the @claude CI bot actually use — so PR #282 became a no-op and the fixes were stranded in its branch history.

This PR ports those fixes into skills/reprexes/SKILL.md.

What changed

• Rscript --vanilla in the clean-session step (step 3). Without --vanilla, Rscript still sources .Rprofile / .Renviron, which contradicts the "clean session" framing; the flag skips them.
• Dropped the inaccurate "since reprex 2.0" qualifier on callr-backed execution. callr-backed clean-session execution predates reprex 2.0, so the version claim was wrong.
• Namespaced the remaining reprex-package calls — reprex::reprex(input = ...), reprex::reprex_clean() / _rescue() / _invert(), and the validation-bonus reference — so they work without an explicit library(reprex). sessionInfo() stays bare (base R); tidyverse::tidyverse_update() was already namespaced.
• Blank lines before the nested lists in step 2 and under "Useful arguments:", for CommonMark-correct rendering.

Note on the reprex_invert() flag

The last review round on #282 flagged reprex_invert() as a possible hallucinated function name. It is real — confirmed exported in the reprex NAMESPACE. The text is ported as-is.

Follow-up

Once this merges, the .ai-config submodule pin in UCD-SERG/lab-manual should be bumped to pick it up (the weekly bump-ai-config.yml workflow does this automatically). PR #282 will be closed as superseded.

🤖 Generated with Claude Code

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Generated by Claude Code

[claude]

Claude finished @d-morrison's task in 1m 45s —— View job

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Review: clean ✅

• Gather context
• Read changed file and diff
• Verify factual claims (hallucination check)
• Post findings

skills/reprexes/SKILL.md — 5 changes, all verified:

Change	Verdict
Rscript --vanilla	Correct. --vanilla implies --no-init-file (skips .Rprofile) and --no-environ (skips .Renviron). Description is accurate.
Drop "since reprex 2.0" on callr	Correct. callr-backed execution was introduced in reprex ≈ 0.3.0, well before 2.0.
Namespace reprex::reprex(input=...)	Real API; input accepts a file path.
Namespace reprex::reprex_clean/rescue/invert()	All three are real exported functions. reprex_invert() is confirmed exported in the reprex NAMESPACE (the concern raised during #282 review was addressed correctly).
Blank lines before nested lists (step 2, "Useful arguments:")	Correct CommonMark fix. Without blank lines, some renderers collapse the nested bullets.

No hallucinations found. The "all exported in reprex 2.x" qualifier on the companion-helpers line was pre-existing and unchanged.