Rust Best Practices
farm-fe/farm
Guide for writing idiomatic Rust code based on Apollo GraphQL's best practices handbook.
Guidelines and conventions for writing, composing, and formatting XPath expressions when building or refactoring linters.
Install Xpath Style
$ npx skills add r-lib/lintr --skill xpath-style -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install r-lib/lintr xpath-style --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/r-lib/lintr.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/xpath-style .claude/skills/xpath-style && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "xpath-style" agent skill from https://github.com/r-lib/lintr/tree/main/.agents/skills/xpath-style into .claude/skills/xpath-style/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xpath-style", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/r-lib/lintr/tree/main/.agents/skills/xpath-styleType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add r-lib/lintr --skill xpath-style -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install r-lib/lintr xpath-style --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/r-lib/lintr.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/xpath-style .agents/skills/xpath-style && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "xpath-style" agent skill from https://github.com/r-lib/lintr/tree/main/.agents/skills/xpath-style into .agents/skills/xpath-style/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xpath-style", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add r-lib/lintr --skill xpath-style -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install r-lib/lintr xpath-style --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/r-lib/lintr.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/xpath-style .cursor/skills/xpath-style && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "xpath-style" agent skill from https://github.com/r-lib/lintr/tree/main/.agents/skills/xpath-style into .cursor/skills/xpath-style/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xpath-style", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/r-lib/lintr.git --path .agents/skills/xpath-style--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add r-lib/lintr --skill xpath-style -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install r-lib/lintr xpath-style --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/r-lib/lintr.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/xpath-style .gemini/skills/xpath-style && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "xpath-style" agent skill from https://github.com/r-lib/lintr/tree/main/.agents/skills/xpath-style into .gemini/skills/xpath-style/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xpath-style", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install r-lib/lintr xpath-styleInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add r-lib/lintr --skill xpath-style -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/r-lib/lintr.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/xpath-style .github/skills/xpath-style && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "xpath-style" agent skill from https://github.com/r-lib/lintr/tree/main/.agents/skills/xpath-style into .github/skills/xpath-style/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xpath-style", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add r-lib/lintr --skill xpath-style -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install r-lib/lintr xpath-style --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/r-lib/lintr.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/xpath-style .opencode/skills/xpath-style && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "xpath-style" agent skill from https://github.com/r-lib/lintr/tree/main/.agents/skills/xpath-style into .opencode/skills/xpath-style/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xpath-style", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
xpath-style- GitHub stars
- 1.3k
- Token cost
- ~4.3k tokens
- SKILL.md length
- 1,813 words
- Files
- 1
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Guidelines and conventions for writing, composing, and formatting XPath expressions when building or refactoring linters.
- Works in 5 steps: Direct Path Steps & Predicates over… → Modular Composition (glue::glue()) &… → Multi-Line Formatting, Indentation, &… → …
- Analyzing XPath queries in linter definitions
- SKILL.md covers 1. Direct Path Steps &…, 2. Modular Composition…, 3. Multi-Line Formatting,… and 4. XPath Performance & Entry…, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Xpath Style is an agent skill from r-lib/lintr. Guidelines and conventions for writing, composing, and formatting XPath expressions when building or refactoring linters. Use this skill whenever writing or analyzing XPath queries in linter definitions.
Its SKILL.md is about 4.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Linting and formatting and Refactoring. The repository describes itself as: Static Code Analysis for R.
When your agent uses it
- Analyzing XPath queries in linter definitions
- Tasks that involve Linting and formatting
- Tasks that involve Refactoring
Example prompts
- “Use the xpath-style skill to guideline and conventions for writing, composing, and formatting XPath expressions when building or refactoring linters”
- “/xpath-style”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Direct Path Steps & Predicates over self::* Transitions
- Modular Composition (glue::glue()) & Helper Utilities
- Multi-Line Formatting, Indentation, & Visual Hierarchy
- XPath Performance & Entry Point Anchoring
- Self-Documentation & Explicit Exclusion Comments
What it can do on your machine
Read from SKILL.md and the folder at commit 5f40339. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are r).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Xpath Style loads about 4.3k tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 1,813 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,813 words (~4,254 tokens).
“When implementing, refactoring, or reviewing XPath expressions across lintr (R/), adhere to the following composition, styling, robust AST targeting, and performance guidelines established by project maintainers:”
- name
- xpath-style
Files
Just SKILL.md in .agents/skills/xpath-style of r-lib/lintr.
Open the folder on GitHubat commit 5f40339
Compare with similar skills
Xpath Style next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Xpath Style this skillr-lib/lintr | 1.3k | — | ~4.3k | Automated safety check: Pass | Custom licence | |
| Rust Best Practicesfarm-fe/farm | 5.6k | 3 repos | ~1.1k | Automated safety check: Pass | MIT | |
| File Good First BugBrowserWorks/waterfox-android | 379 | 2 repos | ~2k | Automated safety check: Pass | Custom licence | |
| Unslop CodeJCarterJohnson/vibecoded-design-tells | 511 | — | ~2.5k | Automated safety check: Pass | Custom licence | |
| Code Quality Gatefengshao1227/ccg-workflow | 5.9k | — | ~593 | Automated safety check: Notes | MIT | |
| Rust Hygiene Audittsz-org/tsz | 577 | — | ~1.5k | Automated safety check: Pass | Apache-2.0 |
Similar skills
File Good First Bug
BrowserWorks/waterfox-android
A skill your agent uses when the user wants to file good-first-bugs in Bugzilla for Firefox.
Unslop Code
JCarterJohnson/vibecoded-design-tells
Strips the tells that make source code read as AI-generated and forces code that fits the project instead of the model's default average.
Code Quality Gate
fengshao1227/ccg-workflow
Scans code for complexity, long functions, duplicated blocks, naming problems and code smells with a Node script, then reports and suggests refactors.
Rust Hygiene Audit
tsz-org/tsz
Run a deep DRY + code-hygiene audit of the Rust workspace and turn the findings into verified, deduplicated, hierarchical GitHub tech-debt issues.
Dep Validate
blokadaorg/blokada
A skill your agent uses to validate risky dependency bumps end to end as a local or cloud-launched agent.
More from r-lib/lintr
Literate R Formats
r-lib/lintr
Guidelines and architecture for handling literate R documents (.Rmd, .qmd, .Rnw, .Rhtml) and source extraction in the r-lib/lintr package.
Testing Linters
r-lib/lintr
Guidelines and conventions for writing unit tests for linters in the r-lib/lintr package using testthat.
Developing Linters
r-lib/lintr
Guidelines and best practices for creating, extending, and refactoring linters in the r-lib/lintr package.
Related
Categories
Questions about Xpath Style
What does Xpath Style do?
Guidelines and conventions for writing, composing, and formatting XPath expressions when building or refactoring linters. Xpath Style is an agent skill from r-lib/lintr. Guidelines and conventions for writing, composing, and formatting XPath expressions when building or refactoring linters.
When should I use Xpath Style?
Xpath Style fits situations like: analyzing XPath queries in linter definitions; tasks that involve Linting and formatting; tasks that involve Refactoring.
How do I install Xpath Style in Claude Code?
Run `npx skills add r-lib/lintr --skill xpath-style -a claude-code`. Or copy the skill folder (.agents/skills/xpath-style in r-lib/lintr) into .claude/skills/xpath-style in your project. Claude Code loads it when a task matches its description.
How do I install Xpath Style in Codex?
Run `npx skills add r-lib/lintr --skill xpath-style -a codex`. Or copy the skill folder (.agents/skills/xpath-style in r-lib/lintr) into .agents/skills/xpath-style in your project. Codex loads it when a task matches its description.
Can I use Xpath Style in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add r-lib/lintr --skill xpath-style -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/xpath-style, .gemini/skills/xpath-style, .github/skills/xpath-style and .opencode/skills/xpath-style in your project.
What does Xpath Style need to run?
SKILL.md names no scripts, command-line tools or credentials: Xpath Style is instructions for the agent only.
Does Xpath Style access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Xpath Style safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Xpath Style use?
Xpath Style has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Xpath Style use?
About 4.3k tokens (SKILL.md is roughly 17k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Xpath Style?
Skills that share tags, products or a category with Xpath Style: Rust Best Practices (farm-fe/farm, 5.6k stars), File Good First Bug (BrowserWorks/waterfox-android, 379 stars), Unslop Code (JCarterJohnson/vibecoded-design-tells, 511 stars) and Code Quality Gate (fengshao1227/ccg-workflow, 5.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Xpath Style?
r-lib (a GitHub organization) maintains it in r-lib/lintr, which has 1,296 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 8, 2026.
Source: r-lib/lintr on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.