A sample swiftlint config that I use along with https://github.com/SFSafeSymbols/SFSafeSymbols

swiftlint-sample1.yml

# By default, SwiftLint uses a set of sensible default rules you can adjust:
disabled_rules: # rule identifiers turned on by default to exclude from running
  - colon
  - comma
  - control_statement
  - type_name
  - trailing_whitespace
  - identifier_name
  - statement_position
  - force_try
  - force_cast
  - multiple_closures_with_trailing_closure
opt_in_rules: # some rules are turned off by default, so you need to opt-in
  - empty_count # Find all the available rules by running: `swiftlint rules`

# Alternatively, specify all rules explicitly by uncommenting this option:
# only_rules: # delete `disabled_rules` & `opt_in_rules` if using this
#   - empty_parameters
#   - vertical_whitespace

included: # paths to include during linting. `--path` is ignored if present.
excluded: # paths to ignore during linting. Takes precedence over `included`.
  - Carthage
  - Pods
  - Source/ExcludedFolder
  - Source/ExcludedFile.swift
  - Source/*/ExcludedFile.swift # Exclude files with a wildcard
analyzer_rules: # Rules run by `swiftlint analyze` (experimental)
  - explicit_self

# configurable rules can be customized from this configuration file
# binary rules can set their severity level
# rules that have both warning and error levels, can set just the warning level
# implicitly
function_parameter_count: 6
line_length: 375
function_body_length: 100
cyclomatic_complexity: 25
# they can set both implicitly with an array
type_body_length:
  - 500 # warning
  - 600 # error
# or they can set both explicitly
file_length:
  warning: 600
  error: 1200
# naming rules can set warnings/errors for min_length and max_length
# additionally they can set excluded names
reporter: "xcode" # reporter type (xcode, json, csv, checkstyle, codeclimate, junit, html, emoji, sonarqube, markdown, github-actions-logging)

# Custom Rules
custom_rules:
  sf_safe_symbol:
    name: "Safe SFSymbol"
    message: "Use `SFSafeSymbols` via `systemSymbol` parameters for type safety."
    regex: "(Image\\(systemName:)|(NSImage\\(symbolName:)|(Label[^,]+?,\\s*systemImage:)|(UIApplicationShortcutIcon\\(systemImageName:)"
    severity: warning