markdownlint-cli2

markdownlint-cli2 lints Markdown and CommonMark files across repos using directory-based configuration and the markdownlint rule set. It is built for docs checks, editor formatting flows, and CI runs where you want to find or automatically fix Markdown style issues.

• Lint Markdown files across a repo with glob patterns, nested config files, ignore rules, and custom rule or parser configuration.
• Auto-fix supported issues in place with --fix, or format Markdown from stdin to stdout with --format for editor and pipeline workflows.
• Emit machine-readable findings through configured formatter packages such as JSON, JUnit, SARIF, GitLab Code Quality, or summary reports.

• Non-interactive runs and clear 0/1/2 exit codes make inspect-edit-rerun verification loops straightforward.
• Repo-level config discovery and --fix support make it useful for documentation cleanup, pre-commit checks, and CI enforcement.
• Structured output exists, but not as a one-off --json flag; unattended setups need an outputFormatters config entry such as markdownlint-cli2-formatter-json.

• JSON and other report formats are configured through formatter modules, so automation usually needs a checked-in config file instead of an ad hoc flag.
• Auto-fix only covers rules that emit fix information, so some findings still need manual or agent-authored edits.