How do I install the Repo Hardening skill?

Run npx skillmds add majiayu000/repo-hardening in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Repo Hardening skill do?

Best practices for setting up quality tooling across different language stacks. It is listed under Coding & Dev Tools on SkillMD.

Is Repo Hardening safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Repo Hardening?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Repo Hardening free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Repo Hardening?

majiayu000 (@majiayu000) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Repo Hardening by majiayu000 — Agent Skill

Name: Repo Hardening
Rating: 4.5 (4 reviews)
Author: majiayu000

File contents

Repo Hardening Skill

Best practices for setting up quality tooling across different language stacks.

Language Detection

Detect stack from project files:

File	Language	Package Manager
`package.json`	JavaScript/TypeScript	npm/yarn/pnpm/bun
`pyproject.toml`	Python	pip/poetry/uv
`requirements.txt`	Python	pip
`Cargo.toml`	Rust	cargo
`go.mod`	Go	go
`pom.xml`	Java	Maven
`build.gradle`	Java/Kotlin	Gradle
`build.gradle.kts`	Kotlin	Gradle
`Gemfile`	Ruby	Bundler
`composer.json`	PHP	Composer
`.csproj` / `.sln`	C#/.NET	dotnet
`Package.swift`	Swift	SwiftPM
`mix.exs`	Elixir	Mix
`CMakeLists.txt`	C/C++	CMake
`Makefile`	C/C++	Make
`build.sbt`	Scala	sbt

Language References

Per-language tooling configs (linting, formatting, type checking, hooks, coverage):

Language	Reference
JavaScript/TypeScript	skills/repo-hardening/references/javascript-typescript.md
Python	skills/repo-hardening/references/python.md
Rust	skills/repo-hardening/references/rust.md
Go	skills/repo-hardening/references/go.md
Java	skills/repo-hardening/references/java.md
Kotlin	skills/repo-hardening/references/kotlin.md
Ruby	skills/repo-hardening/references/ruby.md
PHP	skills/repo-hardening/references/php.md
C#/.NET	skills/repo-hardening/references/csharp-dotnet.md
Swift	skills/repo-hardening/references/swift.md
Elixir	skills/repo-hardening/references/elixir.md
C/C++	skills/repo-hardening/references/c-cpp.md
Scala	skills/repo-hardening/references/scala.md

.editorconfig

Universal editor settings:

root = true

[*]
indent_style = space
indent_size = 2
end_of_line = lf
charset = utf-8
trim_trailing_whitespace = true
insert_final_newline = true

[*.{py,rs}]
indent_size = 4

[*.go]
indent_style = tab
indent_size = 4

[*.md]
trim_trailing_whitespace = false

[Makefile]
indent_style = tab

.gitattributes

Normalize line endings:

* text=auto eol=lf
*.{cmd,[cC][mM][dD]} text eol=crlf
*.{bat,[bB][aA][tT]} text eol=crlf
*.pdf binary
*.png binary
*.jpg binary
*.gif binary

Setup Priority

.editorconfig - Universal, no dependencies
Linter - Catches bugs early
Formatter - Consistent style
Git hooks - Enforce on commit
Type checker - Optional but recommended
Test coverage - Enforce minimum threshold (default: 80%)

Common Mistakes

Conflicting rules - Ensure linter and formatter agree (use eslint-config-prettier)
Missing hook permissions - chmod +x .git/hooks/*
Hook not running - Ensure .git/hooks/pre-commit exists (not .git/hooks/pre-commit.sample)
Too strict initially - Start with warnings, graduate to errors

---name: repo-hardeningdescription: Best practices for setting up quality tooling across different language stacks.--- # Repo Hardening Skill Best practices for setting up quality tooling across different language stacks. --- ## Language Detection Detect stack from project files: | File | Language | Package Manager | |------|----------|-----------------| | `package.json` | JavaScript/TypeScript | npm/yarn/pnpm/bun | | `pyproject.toml` | Python | pip/poetry/uv | | `requirements.txt` | Python | pip | | `Cargo.toml` | Rust | cargo | | `go.mod` | Go | go | | `pom.xml` | Java | Maven | | `build.gradle` | Java/Kotlin | Gradle | | `build.gradle.kts` | Kotlin | Gradle | | `Gemfile` | Ruby | Bundler | | `composer.json` | PHP | Composer | | `*.csproj` / `*.sln` | C#/.NET | dotnet | | `Package.swift` | Swift | SwiftPM | | `mix.exs` | Elixir | Mix | | `CMakeLists.txt` | C/C++ | CMake | | `Makefile` | C/C++ | Make | | `build.sbt` | Scala | sbt | --- ## Language References Per-language tooling configs (linting, formatting, type checking, hooks, coverage): | Language | Reference | |----------|-----------| | JavaScript/TypeScript | skills/repo-hardening/references/javascript-typescript.md | | Python | skills/repo-hardening/references/python.md | | Rust | skills/repo-hardening/references/rust.md | | Go | skills/repo-hardening/references/go.md | | Java | skills/repo-hardening/references/java.md | | Kotlin | skills/repo-hardening/references/kotlin.md | | Ruby | skills/repo-hardening/references/ruby.md | | PHP | skills/repo-hardening/references/php.md | | C#/.NET | skills/repo-hardening/references/csharp-dotnet.md | | Swift | skills/repo-hardening/references/swift.md | | Elixir | skills/repo-hardening/references/elixir.md | | C/C++ | skills/repo-hardening/references/c-cpp.md | | Scala | skills/repo-hardening/references/scala.md | --- ## .editorconfig Universal editor settings: ```ini root = true [*] indent_style = space indent_size = 2 end_of_line = lf charset = utf-8 trim_trailing_whitespace = true insert_final_newline = true [*.{py,rs}] indent_size = 4 [*.go] indent_style = tab indent_size = 4 [*.md] trim_trailing_whitespace = false [Makefile] indent_style = tab ``` --- ## .gitattributes Normalize line endings: ```text * text=auto eol=lf *.{cmd,[cC][mM][dD]} text eol=crlf *.{bat,[bB][aA][tT]} text eol=crlf *.pdf binary *.png binary *.jpg binary *.gif binary ``` --- ## Setup Priority 1. **.editorconfig** - Universal, no dependencies 2. **Linter** - Catches bugs early 3. **Formatter** - Consistent style 4. **Git hooks** - Enforce on commit 5. **Type checker** - Optional but recommended 6. **Test coverage** - Enforce minimum threshold (default: 80%) --- ## Common Mistakes 1. **Conflicting rules** - Ensure linter and formatter agree (use eslint-config-prettier) 2. **Missing hook permissions** - `chmod +x .git/hooks/*` 3. **Hook not running** - Ensure `.git/hooks/pre-commit` exists (not `.git/hooks/pre-commit.sample`) 4. **Too strict initially** - Start with warnings, graduate to errors

Frequently asked questions