code-quality

Code Quality

Structured code review and quality enforcement across common tech stacks. Checklists, linting strategies, and metrics to keep codebases healthy.

Quick Start

Run a Code Quality Check

1. Run static analysis: Linters, type checkers, formatters
2. Review against checklist: Language-specific items below
3. Check complexity metrics: Cyclomatic < 25, data flow < 25
4. Report findings: Structured output with severity and recommendations

Linting Configurations

Rust — Clippy Config

Standard clippy configuration (in Cargo.toml or .clippy.toml):

[lints.clippy]
cognitive_complexity = "warn"
pedantic = { level = "deny", priority = -1 }
nursery = { level = "deny", priority = -1 }
unwrap_used = "deny"

Standard commands:

cargo fmt
cargo clippy --all-targets --all-features -- -D warnings
cargo check
cargo test -- --test-threads=1

Key rules to enforce:

• No .unwrap() in non-test code (use ? or .expect("reason"))
• All public items have rustdoc (#[warn(missing_docs)])
• #[must_use] on functions that return values that should be checked
• When using #[allow(...)], always add a comment explaining why
• If no good explanation exists for #[allow(...)], fix the issue instead

TypeScript — ESLint + Strict Mode

Recommended tsconfig.json strictness:

{
  "compilerOptions": {
    "strict": true,
    "noUncheckedIndexedAccess": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "exactOptionalPropertyTypes": true
  }
}

Key rules to enforce:

• No any — use unknown and type guards instead
• No // @ts-ignore — fix the type issue or use // @ts-expect-error with explanation
• Prefer const over let, never use var
• Use discriminated unions for state modeling
• Explicit return types on exported functions

Python — Ruff + Mypy

Recommended pyproject.toml:

[tool.ruff]
target-version = "py312"
line-length = 88

[tool.ruff.lint]
select = ["E", "F", "W", "I", "N", "UP", "ANN", "B", "A", "C4", "DTZ", "ISC", "PIE", "PT", "RET", "SIM", "TCH", "ARG", "PTH", "ERA"]

[tool.mypy]
strict = true
warn_return_any = true
warn_unreachable = true