feat(lint): add vale-run skill

Covers invoking the vale CLI and interpreting its output — output
formats, severity filtering, exit-code handling, and false-positive
triage — for an already-configured project.

plugins/lint/skills/vale-run/README.md

@@ -0,0 +1,23 @@
+# vale-run
+
+Run Vale (a prose/style linter) against an already-configured project and interpret its results.
+
+## What it does
+
+This skill covers invoking the `vale` CLI against files or directories, choosing an output format (human-readable CLI, `line`, or machine-parseable `JSON`), filtering by severity via `--minAlertLevel`, and handling exit codes in scripts and CI. It also covers resolving common runtime issues: false positives, format-specific inline suppression, and CI failures caused solely by Vale's non-zero exit code. It assumes the project already has a working `.vale.ini` and installed styles — setting those up is the sibling `vale-config` skill's job.
+
+## Usage
+
+```
+/vale-run
+```
+
+Describe what you want to lint and how (human-readable output, CI/JSON output, filtered by severity). The skill will pick the right flags and, if results include false positives, walk through the narrowest applicable fix.
+
+## Files
+
+| File | Purpose |
+|------|---------|
+| `SKILL.md` | Core invocation, key flags, output format guidance, false-positive triage order |
+| `references/troubleshooting.md` | Inline suppression syntax, rule-specific disabling, spelling ignore lists, pre-commit integration, CI edge cases |
+| `references/sources.md` | Research provenance |