timander/copilot-instructions-starter-kit/code-quality

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Offer to add opt-in lint, static-analysis, and coverage tooling for the project's language. Use when the user asks for code review, static-analysis insights, or test coverage.

Install

npx vskill@latest install timander/copilot-instructions-starter-kit/code-quality

SKILL.md

Code Quality Tooling

When the user asks for code review, expert-panel review, or static-analysis insights — and the project lacks tooling — offer to add it.

Stance (every language)

  • Opt-in. Ask before adding anything.
  • Non-breaking. Configure tools to report, not fail the build.
  • Permissive first. Start lenient; tighten incrementally. Don't dump 500 violations on an existing codebase.
  • Reports inform conversations. Coverage gaps → test suggestions. Static-analysis findings → design smells. Lint violations → consistency issues.

Suggestion template

"This project doesn't have static analysis or coverage reporting configured. Would you like me to add {tools for this language}? They produce reports that improve review quality without breaking the build."

Pick the language section below from the files in context. Tools listed per language; non-breaking flags called out only where they're language-specific.

Java

ToolPurpose
PMDStatic analysis (anti-patterns, complexity, dead code)
CheckstyleStyle enforcement
SpotlessFormatting (alternative to Checkstyle; zero-config with google-java-format)
JaCoCoTest coverage
SpotBugsBug pattern detection

Non-breaking flags: failOnViolation=false (Maven) or ignoreFailures=true (Gradle).

Maven (PMD + JaCoCo)
xml
<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-pmd-plugin</artifactId>
    <configuration>
        <failOnViolation>false</failOnViolation>
        <printFailingErrors>true</printFailingErrors>
    </configuration>
</plugin>
<plugin>
    <groupId>org.jacoco</groupId>
    <artifactId>jacoco-maven-plugin</artifactId>
    <executions>
        <execution><goals><goal>prepare-agent</goal></goals></execution>
        <execution><id>report</id><phase>test</phase><goals><goal>report</goal></goals></execution>
    </executions>
</plugin>
Gradle
groovy
plugins { id 'pmd'; id 'checkstyle'; id 'jacoco' }
pmd { ignoreFailures = true; rulesMinimumPriority = 3 }
checkstyle { ignoreFailures = true }
jacocoTestReport { reports { html.required = true; xml.required = true } }

Python

ToolPurpose
ruffLinting + formatting (replaces flake8, isort, black)
mypyStatic type checking
pytest-covTest coverage

All config in pyproject.toml. Use --exit-zero (or report-only modes) in CI.

toml
[tool.ruff]
target-version = "py312"
line-length = 120
 
[tool.ruff.lint]
select = ["E", "F", "I", "N", "W", "UP", "B", "SIM", "RUF"]
 
[tool.mypy]
python_version = "3.12"
warn_return_any = true
warn_unused_configs = true
ignore_missing_imports = true
 
[tool.pytest.ini_options]
addopts = "--cov=src --cov-report=term-missing --cov-report=html"

Ruby

ToolPurpose
RuboCopLinting + style
SimpleCovTest coverage
SorbetGradual static typing

Baseline with rubocop --auto-gen-config. Sorbet is gradual: start typed: false, promote per file.

yaml
# .rubocop.yml
AllCops:
  TargetRubyVersion: 3.2
  NewCops: enable
  SuggestExtensions: false
 
Metrics/MethodLength:
  Max: 20
 
Style/Documentation:
  Enabled: false

Kotlin

ToolPurpose
detektStatic analysis + smell detection
ktlintFormatting (Kotlin Coding Conventions)
KoverTest coverage (JetBrains official)

ignoreFailures = true everywhere. Generate a baseline with detekt --create-baseline. ktlint is a formatting step, not a gate.

kotlin
// build.gradle.kts
plugins {
    id("io.gitlab.arturbosch.detekt") version "1.23.+"
    id("org.jlleitschuh.gradle.ktlint") version "12.+"
    id("org.jetbrains.kotlinx.kover") version "0.8.+"
}
 
detekt {
    buildUponDefaultConfig = true
    config.setFrom("$projectDir/detekt.yml")
    ignoreFailures = true
}
 
kover { reports { verify { /* advisory, not gates */ } } }

Scala

ToolPurpose
scalafmtFormatting
scalafixLinting + automated refactoring
WartRemoverStatic analysis
sbt-scoverageTest coverage

Use wartremoverWarnings, not wartremoverErrors. Match scalafmt's runner.dialect to the project's Scala version.

scala
// project/plugins.sbt
addSbtPlugin("org.scalameta"   % "sbt-scalafmt"    % "2.5.+")
addSbtPlugin("ch.epfl.scala"   % "sbt-scalafix"    % "0.12.+")
addSbtPlugin("org.wartremover" % "sbt-wartremover" % "3.1.+")
addSbtPlugin("org.scoverage"   % "sbt-scoverage"   % "2.1.+")
hocon
# .scalafmt.conf
version = "3.8.0"
runner.dialect = scala3
maxColumn = 120
scala
// build.sbt
wartremoverWarnings ++= Warts.unsafe   // warn, don't fail

After Configuring

Run the tools once. Report counts (errors / warnings / coverage %). Ask the user where to prioritize. Don't auto-fix everything — let them decide signal from noise.

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

See the full security report

Quality evaluation

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