Agent skill
cran
Full-arc CRAN submission workflow for R packages: preparation through post-acceptance. Use when: (1) Preparing a package for first CRAN submission, (2) Preparing a resubmission after rejection, (3) Running and interpreting R CMD check --as-cran output, (4) Writing or updating cran-comments.md, (5) Responding to CRAN reviewer feedback point-by-point, (6) Triaging ERRORs, WARNINGs, and NOTEs from R CMD check, (7) Verifying DESCRIPTION metadata, documentation, and URL compliance before submission.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/cran
SKILL.md
CRAN Submission
Surveyverse projects: R CMD check targets (0 errors, 0 warnings, ≤2 notes), pre-approved notes, and
devtools::check()cadence are defined inr-package-conventions.md §3. Those rules take precedence over generic guidance here.
The four-stage arc
| Stage | What you're doing | Reference |
|---|---|---|
| Prepare | DESCRIPTION, docs, URLs, admin — the things devtools::check() won't catch |
preflight-checklist.md |
| Check | R CMD check --as-cran, platform testing, NOTE triage |
check-and-triage.md |
| Submit | Build tarball, devtools::submit_cran(), write cran-comments.md |
submit-and-respond.md |
| Respond | Point-by-point reviewer responses, resubmission | submit-and-respond.md |
Tool map
| Task | Tool |
|---|---|
| Full local check | devtools::check() |
| CRAN-style check (fast iteration) | devtools::check(args = "--as-cran") |
| CRAN-style check (submission confidence) | R CMD build . then R CMD check --as-cran pkg_x.y.z.tar.gz |
| Docs and examples only | devtools::check_man() |
| Windows + R-devel | devtools::check_win_devel() |
| Multi-platform preflight | rhub::check_for_cran() |
| URL validation | urlchecker::url_check() |
| Submit to CRAN | devtools::submit_cran() |
| Generate release issue checklist | usethis::use_release_issue() |
Create cran-comments.md |
usethis::use_cran_comments() |
Create NEWS.md |
usethis::use_news_md() |
| Bump version | usethis::use_version() |
The CRAN mindset
CRAN checks run in a minimal, non-interactive environment with no hidden dependencies. Write code as if:
- There is no network access during checks (examples, tests, vignettes)
- Nothing is written outside
tempdir() - There are no interactive prompts
- Examples run in a few seconds each — not minutes
- No binary executables are bundled in the source package
Prefer fixes that make checks green everywhere over explanations that justify fragility.
ERROR / WARNING / NOTE triage
- ERRORs: Always blockers. Fix before submission.
- WARNINGs: Almost always blockers. Very rare contextual exceptions.
- NOTEs: Split into two types:
- Actionable — fix it (undeclared dependency, broken URL, too-long examples)
- Contextual — explain in
cran-comments.md(incoming feasibility NOTE on new submissions)
When keeping a NOTE, cran-comments.md must answer:
- What is the NOTE?
- Why does it happen?
- Why is it safe / expected?
- What did you do to minimize it?
Quality gate (recommended order)
devtools::check()is clean — 0 errors, 0 warnings- Preflight checklist complete — see preflight-checklist.md
- Tarball check:
R CMD build .→R CMD check --as-cran pkg_x.y.z.tar.gz - Cross-platform:
devtools::check_win_devel()at minimum; R-hub for broader coverage cran-comments.mdwritten and reviewed- Ready to respond point-by-point if CRAN asks
High-frequency failure surfaces
- DESCRIPTION metadata: Title case, forbidden phrases, missing
cphrole - Documentation: Missing
@returnor@exampleson exported functions - Examples: network calls, unseeded randomness, writes outside tempdir, commented-out code
- URLs: HTTP instead of HTTPS, redirecting links
- Undeclared dependencies: packages used in code/examples/tests but absent from DESCRIPTION
- Package size / runtime: large embedded data, slow vignettes or examples
External resources
- CRAN policy: https://cran.r-project.org/web/packages/policies.html
- CRAN submission checklist: https://cran.r-project.org/web/packages/submission_checklist.html
- Writing R Extensions (R CMD check): https://cran.r-project.org/doc/manuals/r-release/R-exts.html
- R Packages (2e) — releasing to CRAN: https://r-pkgs.org/release.html
- win-builder: https://win-builder.r-project.org/
- macbuilder: https://mac.r-project.org/macbuilder/submit.html
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