CRAN version 1.1

1. Check control and output

New all_check_groups() and checks_by_group() functions for discovering and selecting checks by category instead of individual names (#239).
Every check now belongs to a named group. Use all_check_groups() to see the 16 available groups and checks_by_group("description") to list checks in a group.
Added new describe_check_groups() function, to produce group descriptions in console (#290).
Added 'groups' param to print() method, to enable printing only specified groups (#288).
Exclude entire check groups via goodpractice.exclude_check_groups option or GP_EXCLUDE_CHECK_GROUPS environment variable.

New default_checks() and tidyverse_checks() helper functions.
gp() now defaults to default_checks() instead of all_checks(), keeping optional check sets out of the default run.
New describe_check() function to print descriptions of all implemented checks (@152)
Exclude specific files from checks via goodpractice.exclude_path option or GP_EXCLUDE_PATH environment variable. Useful for generated code like R/RcppExports.R.

goodpractice now uses cli, and no longer depends on crayon and clisymbols (@olivroy, #167).
Check advice now uses cli inline markup throughout. All gp strings support {.code}, {.fn}, {.pkg}, {.file}, {.field}, and {.url} for consistent styling. Custom checks can use the same markup in their gp strings.
If your editor supports it, goodpractice now prints clickable hyperlinks to console.
gp_advice() gains a type parameter ("error", "info", "warning") to control the output symbol and colour. Checks can return list(status = TRUE, type = "info") to display informational messages without a failure cross.

R code inspection now uses treesitter for AST-based parsing instead of regex or getParseData(). Checks like print_return_invisible, tidyverse_no_missing, and tidyverse_export_order benefit from more robust and faster code analysis.
Tree-sitter function detection now only considers assignment operators (<-, =, <<-), avoiding false matches on arithmetic expressions such as x + function() 1 (#277).
ts_parse() now honours the package's declared Encoding when reading source files, preventing mojibake for packages using non-UTF-8 encodings.
New duplicate_function_bodies check: flags functions with identical bodies across files that should be consolidated into a shared helper (#232).

Expanded default lintr checks from 9 to ~53, covering correctness (e.g. anyDuplicated() vs any(duplicated())), performance (e.g. colSums() vs apply()), readability (e.g. switch() vs long if/else chains), and testthat best practices (e.g. expect_identical() vs expect_equal()). All respect .lintr configuration files (#189).
New lintr_installed_packages_linter check: flags calls to installed.packages(),
which can be very slow and is rejected by CRAN. Use find.package() or system.file() instead (#278).
New optional tidyverse style guide checks: 21 lintr-based checks plus 2 structural checks (R file naming, test file mirroring). Opt in via checks = c(default_checks(), tidyverse_checks()).

prep_description defaults Encoding to UTF-8 when absent, so downstream checks always have a concrete value. Unreadable files emit a warning instead of being silently skipped (#277).
New DESCRIPTION checks (#122, #85):
- description_not_start_with_package: Description should not start with "This package"
- description_urls_in_angle_brackets: URLs in Description must be wrapped in angle brackets
- description_doi_format: DOIs should use <doi:...> not full URLs
- description_urls_not_http: URLs should use https not http
- no_description_duplicate_deps: No duplicate packages across dependency fields
- description_valid_roles: Authors@R roles must be valid MARC relator codes
- description_pkgname_single_quoted: Package names in Title/Description must be single-quoted

New r_file_extension check: flags R scripts using .r or .q instead of .R (#121).
New print_return_invisible check: flags print methods that don't return invisible(x) (#49).
New vignette_no_rm_list check: flags rm(list = ls()) in vignettes (#20).
New vignette_no_setwd check: flags setwd() in vignettes (#21).
New reverse_dependencies check: queries CRAN for reverse dependencies and advises running revdepcheck::revdep_check() before submission.
New spelling check: flags misspelled words in documentation via spelling::spell_check_package() (#84).
New has_readme and has_news checks for package documentation completeness (#45).
New roxygen2 checks: export/noRd tagging, unknown tags, and @inheritParams/@inheritDotParams validation (#197).

Added makefile (#203)
Lowered default cyclomatic complexity limit from 50 to 15, aligning with lintr and pkgcheck defaults. Configurable via goodpractice.cyclocomp_limit option (#150).
Preparation steps can now run in parallel via the future.apply package. Set future::plan("multisession") before calling gp() to enable parallel data gathering (#47).
gp() now fails if the path provided to it is not a package (does not contain a DESCRIPTION file) (#190, @maelle)
Prep step error handling refactored into run_prep_step() helper. New prep functions can use run_prep_step(state, "name", function() { ... }, quiet) instead of manually wrapping work in try() and emitting warnings on failure.
Removed stringsAsFactors = FALSE arguments throughout, relying on the R 4.0 default. Package now requires R >= 4.0.0.