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

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+# 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 |

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

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+---
+name: vale-run
+description: >
+  Use when running Vale (a prose/style linter) against files or directories in an
+  already-configured project — one that already has a .vale.ini — and interpreting
+  or reporting its results: choosing an output format for humans vs. CI, filtering
+  by severity, handling Vale's exit codes in scripts, or resolving common runtime
+  issues like false positives and unexpected CI failures. Use even if the user
+  doesn't say "vale" explicitly, e.g. "lint the docs", "check prose style", "run
+  the style linter", "why is CI failing on the docs check". Do not use when the
+  project has no .vale.ini yet, or needs styles installed/configured — that's the
+  vale-config skill.
+metadata:
+  version: "0.1.0"
+  category: linting
+  source_keys:
+    - context7-websites-vale-sh
+---
+
+## Gotchas
+
+- Vale exits non-zero whenever it finds an alert at or above `MinAlertLevel` — that's what makes it usable as a CI gate, not a sign the invocation failed. Read the output before concluding the command errored.
+- `vale ls-config` prints the fully-resolved, currently active configuration as JSON — the fastest way to check why a rule "isn't applying" is what's actually active, not what's written in `.vale.ini`.
+- Inline suppression syntax is format-specific: Markdown/MDX uses `{/* vale off */}` / `{/* vale on */}`, Org mode uses `# vale off` / `# vale on`. Don't assume one syntax works across formats.
+
+## Running vale
+
+Default invocation:
+
+```bash
+vale <path-or-glob>
+```
+
+Key flags:
+
+| Flag | Purpose |
+|---|---|
+| `--output=<style>` | Output format/template: `CLI` (default, human-readable), `line` (compact, one alert per line, good for grep/piping), `JSON` (for programmatic parsing), or a custom template. |
+| `--minAlertLevel=<suggestion\|warning\|error>` | Overrides `MinAlertLevel` from `.vale.ini` for this run only, without editing config. |
+| `--no-exit` | Forces exit code `0` regardless of findings. Use in CI stages that should surface lint output without hard-failing the build. |
+| `--ignore-syntax` | Treats input as plain text, skipping format-aware parsing — use when a file's syntax-aware parser produces noisy or wrong results. |
+
+`vale sync` downloads the packages/styles declared in `.vale.ini` — that's a one-time-per-change setup step (vale-config's territory), not part of a normal lint run. If a run behaves as though no styles are active, that's a sign `vale sync` hasn't been run yet, not a `vale-run` problem.
+
+Prefer `--output=JSON` whenever the caller (a script, a CI step, another agent) needs to act on individual alerts rather than just get a pass/fail signal — `CLI` and `line` are for humans reading the terminal.
+
+## Fixing false positives
+
+Scope the fix as narrowly as possible, in this order:
+
+1. **One-off**: inline-suppress the specific text run with the format's `vale off`/`vale on` markup.
+2. **Recurring known-exception string, one rule**: disable that specific rule for that specific match inline (e.g. `{/* vale Style.Redundancy["ACT test","OTHER"] = NO */}` ... `= YES`), rather than the whole rule.
+3. **Known project term failing spell check**: add it to the style's `ignore` list, not an inline suppression.
+
+Never disable a rule project-wide to fix one false positive — editing `.vale.ini`/`BasedOnStyles` is vale-config's job, and it silences the rule everywhere, not just the false-positive case.
+
+If output looks wrong because Vale mis-parsed a file's format, rerun with `--ignore-syntax` before assuming the rule itself is broken.
+
+For CI that fails solely because Vale returned non-zero on found alerts — not because the content is wrong for that pipeline stage — add `--no-exit` rather than disabling the rule.
+
+If setting up Vale as a pre-commit hook or need the full inline-suppression/spelling-ignore syntax reference, read `references/troubleshooting.md`.

plugins/lint/skills/vale-run/references/sources.md

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+# Sources
+
+## context7-websites-vale-sh
+
+- **URL:** context7:/websites/vale_sh
+- **Description:** Official Vale documentation site (vale.sh) indexed by Context7 — `.vale.ini` config reference, style/rule/check model, CLI commands and flags, installation across package managers and Docker, format-specific inline disable syntax, pre-commit integration, spelling ignore lists.
+- **Research doc:** plugins/lint/docs/research/docs/vale/sources.md
+- **Contributing files:** SKILL.md, references/troubleshooting.md
+- **Status:** `extracted`

plugins/lint/skills/vale-run/references/troubleshooting.md

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+---
+source_keys:
+  - context7-websites-vale-sh
+---
+
+# Vale troubleshooting reference
+
+## Inline suppression syntax by format
+
+Markdown/MDX:
+```mdx
+{/* vale off */}
+This text will be ignored.
+{/* vale on */}
+```
+
+Org mode:
+```org
+# vale off
+This text will be ignored.
+# vale on
+```
+
+## Disabling a specific rule for specific matches
+
+Targets one rule and specific known-exception strings, then re-enables — the preferred fix for a recurring false positive on a specific term, since it keeps the rule active everywhere else:
+
+```mdx
+{/* vale Style.Redundancy["ACT test","OTHER"] = NO */}
+This is some text ACT test
+{/* vale Style.Redundancy["ACT test","OTHER"] = YES */}
+```
+
+## Ignoring words in spell check
+
+The `spelling` check accepts an `ignore` list of external plain-text files, so project-specific terms don't need touching the dictionary:
+
+```yaml
+extends: spelling
+message: "Did you really mean '%s'?"
+level: error
+ignore:
+  - ignore1.txt
+  - ignore2.txt
+```
+
+## Plain-text fallback
+
+If a file's syntax-aware parsing produces noisy or incorrect results (an unsupported or malformed format), rerun with `--ignore-syntax` to treat it as plain text instead of relying on the format-specific parser.
+
+## CI failing unexpectedly
+
+If a CI job fails solely because Vale returns a non-zero exit code on found alerts — not because the content is actually wrong for that pipeline stage — add `--no-exit` rather than suppressing the rule itself. This preserves the lint output while not gating the build on it.
+
+## pre-commit integration
+
+Vale ships a pre-commit hook definition. A typical setup runs `vale sync` once (with `pass_filenames: false`) plus the actual lint pass with CI-appropriate flags:
+
+```yaml
+repos:
+  - repo: https://github.com/errata-ai/vale
+    rev: 16d3a7f
+    hooks:
+      - id: vale
+        name: vale sync
+        pass_filenames: false
+        args: [sync]
+      - id: vale
+        args: [--output=line, --minAlertLevel=error]
+```
+
+## CI output for machine parsing
+
+```bash
+$ vale --output=JSON README.md
+```
+
+Use `--output=JSON` when a CI step needs to parse results programmatically rather than read the default CLI-formatted output.