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\n \"yamllint\"\n

\n\n

@asymmetric-effort/yamllint

\n\n

\n A zero-dependency TypeScript YAML parser, linter, and validator with detailed error reporting.\n Feature-compatible with adrienverge/yamllint.\n

\n\n

\n \"CI\"\n \"npm\"\n \"license\"\n

\n\n---\n\n## Features\n\n- 24 configurable linting rules covering formatting, style, and correctness\n- Multiple output formats: standard, parsable, colored, GitHub Actions\n- Inline comment directives to suppress rules per-line or per-block\n- Built-in `default` and `relaxed` configuration presets\n- Recursive directory scanning with glob-based file filtering\n- Strict mode with configurable severity levels (error/warning)\n- Full CLI and programmatic API\n\n## Installation\n\n```bash\nnpm install -g @asymmetric-effort/yamllint\n```\n\nOr as a dev dependency:\n\n```bash\nnpm install --save-dev @asymmetric-effort/yamllint\n```\n\n## Usage\n\n### CLI\n\n```bash\n# Lint a file\nyamllint myfile.yaml\n\n# Lint a directory recursively\nyamllint ./config/\n\n# Read from stdin\ncat myfile.yaml | yamllint -\n\n# Use a custom config\nyamllint -c .yamllint.yaml myfile.yaml\n\n# Inline config\nyamllint -d \"extends: relaxed\" myfile.yaml\n\n# Parsable output for CI\nyamllint -f parsable .\n\n# Strict mode (exit 2 on warnings)\nyamllint --strict .\n\n# List targeted files\nyamllint --list-files .\n```\n\n### Programmatic API\n\n```typescript\nimport { lint, loadConfig } from \"@asymmetric-effort/yamllint\";\n\nconst source = `---\nkey: value\n`;\n\nconst { resolved } = loadConfig(undefined, \"extends: default\");\nconst result = lint(source, resolved);\n\nfor (const problem of result.problems) {\n console.log(`${problem.line}:${problem.column} [${problem.level}] ${problem.message}`);\n}\n```\n\n## Configuration\n\nyamllint looks for configuration in these locations (in order):\n\n1. `.yamllint`, `.yamllint.yaml`, or `.yamllint.yml` in the current or parent directories\n2. File specified by `$YAMLLINT_CONFIG_FILE` environment variable\n3. `$XDG_CONFIG_HOME/yamllint/config` (defaults to `~/.config/yamllint/config`)\n4. Built-in `default` configuration\n\n### Example Configuration\n\n```yaml\nextends: default\n\nrules:\n line-length:\n max: 120\n level: warning\n document-start: disable\n truthy:\n allowed-values: [\"true\", \"false\"]\n```\n\n### Presets\n\n| Preset | Description |\n|--------|-------------|\n| `default` | Strict — most rules enabled as errors |\n| `relaxed` | Lenient — disables comments/truthy, downgrades others to warnings |\n\n## Rules\n\n| Rule | Type | Default | Description |\n|------|------|---------|-------------|\n| `anchors` | token | error | Validates anchor/alias usage |\n| `braces` | token | error | Controls spacing inside `{}` |\n| `brackets` | token | error | Controls spacing inside `[]` |\n| `colons` | token | error | Enforces colon spacing |\n| `commas` | line | error | Regulates comma spacing |\n| `comments` | comment | warning | Enforces comment formatting |\n| `comments-indentation` | comment | warning | Ensures comment alignment |\n| `document-end` | token | disabled | Manages `...` marker |\n| `document-start` | token | warning | Requires/forbids `---` marker |\n| `empty-lines` | line | error | Limits consecutive blank lines |\n| `empty-values` | token | disabled | Prevents implicit null values |\n| `float-values` | token | disabled | Controls float representations |\n| `hyphens` | token | error | Limits spaces after `-` |\n| `indentation` | line | error | Enforces consistent indentation |\n| `key-duplicates` | token | error | Prevents duplicate mapping keys |\n| `key-ordering` | token | disabled | Alphabetizes mapping keys |\n| `line-length` | line | error | Sets maximum line width |\n| `new-line-at-end-of-file` | line | error | Requires trailing newline |\n| `new-lines` | line | error | Standardizes line endings |\n| `octal-values` | token | disabled | Prevents octal value confusion |\n| `quoted-strings` | token | disabled | Controls string quoting |\n| `trailing-spaces` | line | error | Removes trailing whitespace |\n| `truthy` | token | warning | Restricts boolean representations |\n\n## Comment Directives\n\nSuppress rules inline using comment directives:\n\n```yaml\n# Disable a specific rule for one line\nkey: value # yamllint disable-line rule:line-length\n\n# Disable all rules for one line\nkey: value # yamllint disable-line\n\n# Disable rules for a block\n# yamllint disable rule:colons\nkey : value\n# yamllint enable rule:colons\n\n# Disable all rules for the rest of the file\n# yamllint disable-file\n```\n\n## Output Formats\n\n| Format | Description |\n|--------|-------------|\n| `standard` | Human-readable with filename header |\n| `parsable` | Machine-readable: `file:line:col: [level] msg (rule)` |\n| `colored` | Standard with ANSI colors |\n| `github` | GitHub Actions annotations |\n| `auto` | Detects environment (GitHub Actions, TTY color support) |\n\n## Exit Codes\n\n| Code | Normal Mode | Strict Mode |\n|------|------------|-------------|\n| 0 | No errors | No errors or warnings |\n| 1 | Errors found | Errors found |\n| 2 | — | Warnings only |\n\n## Development\n\n```bash\n# Setup\nmake setup\n\n# Run tests\nmake test\n\n# Lint\nmake lint\n\n# Build\nmake build\n\n# Release\nmake release\n```\n\n## License\n\n[MIT](LICENSE.txt)\n","readmeFilename":"README.md"}