Vale

Vale is a prose linter for documentation, markup files, and supported code comments that applies configurable style, spelling, readability, and terminology rules from a local .vale.ini and styles tree. It is built for docs review, editor integration, and CI enforcement rather than terminal-first authoring.

• Lint Markdown, AsciiDoc, reStructuredText, HTML, XML, Org, plain text, and supported code comments from files, directories, strings, or stdin.
• Enforce house style, spelling, capitalization, terminology, and readability checks through local configs, vocabularies, and downloadable style packages.
• Emit JSON or line-based findings plus config, directory, and file-metric data for CI gates, editor integrations, and follow-up edits.

• --output=JSON, stdin support, and tested 0/1/2 exit behavior make parse-edit-rerun loops straightforward.
• Repo-local .vale.ini files and style packages fit skill-based workflows well: an agent can inspect the config, run sync, lint changed files, and verify documentation edits with the same rules used in CI.
• Most value is in detection, not remediation; Vale usually reports issues for a human or agent to rewrite rather than fixing prose automatically.

• Useful results depend on a project config and styles or vocabulary; first-run setup may require checked-in rules or a vale sync step.
• If teams rely on custom templates instead of JSON or line output, follow-up parsing becomes more workflow-specific.