diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1398e51..f74489a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,6 +33,9 @@ jobs:
             code:
               - 'src/**'
               - 'test/**'
+              # The suite parses every SKILL.md frontmatter, so a skill-only
+              # edit must still run it.
+              - 'skills/**/SKILL.md'
               - 'bin/**'
               - 'scripts/build-ui.mjs'
               - 'scripts/browser-check.mjs'
diff --git a/skills/thurview/SKILL.md b/skills/thurview/SKILL.md
index 98f6732..667bf0a 100644
--- a/skills/thurview/SKILL.md
+++ b/skills/thurview/SKILL.md
@@ -1,6 +1,6 @@
 ---
 name: thurview
-description: Author and publish a thurview document - a guided, evidence-anchored explanation the reader opens in the browser, annotates, asks questions about, and approves or sends back. Two kinds: a review of a branch, pull request or commit range, and a code explainer of a whole codebase or one subsystem at a pinned commit. Use when the user asks to review a branch or PR, to explain or walk through a change, "review my branch against main", to explain how a codebase or subsystem works or where its design problems might be, or invokes /thurview. Not for a pass/fail bug hunt.
+description: Author and publish a thurview document - a guided, evidence-anchored explanation the reader opens in the browser, annotates, asks questions about, and approves or sends back. Two kinds — a review of a branch, pull request or commit range, and a code explainer of a whole codebase or one subsystem at a pinned commit. Use when the user asks to review a branch or PR, to explain or walk through a change, "review my branch against main", to explain how a codebase or subsystem works or where its design problems might be, or invokes /thurview. Not for a pass/fail bug hunt.
 user-invocable: true
 argument-hint: "[<pr-number|pr-url> | --base <ref> --head <ref> | explain [<path>]]"
 ---
diff --git a/test/skill-frontmatter.test.ts b/test/skill-frontmatter.test.ts
new file mode 100644
index 0000000..4e9bcf0
--- /dev/null
+++ b/test/skill-frontmatter.test.ts
@@ -0,0 +1,61 @@
+import { readdirSync, readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import { describe, expect, it } from "vitest";
+import { parse as parseYaml } from "yaml";
+
+const repoRoot = fileURLToPath(new URL("..", import.meta.url));
+const SKIP = new Set(["node_modules", "dist", ".git"]);
+
+function skillFiles(): string[] {
+  return readdirSync(repoRoot, { recursive: true, withFileTypes: true })
+    .filter((e) => e.isFile() && e.name === "SKILL.md")
+    .map((e) => `${e.parentPath.slice(repoRoot.length)}/${e.name}`)
+    .filter((p) => !p.split("/").some((seg) => SKIP.has(seg)));
+}
+
+/**
+ * Load a SKILL.md frontmatter the way a skill installer does: the leading
+ * `---` block, parsed as YAML. Throws when it is missing or does not parse.
+ */
+function loadFrontmatter(source: string): Record<string, unknown> {
+  const m = /^---\n([\s\S]*?)\n---\n/.exec(source);
+  if (!m) throw new Error("no frontmatter block");
+  const fm = parseYaml(m[1]!) as unknown;
+  if (!fm || typeof fm !== "object" || Array.isArray(fm))
+    throw new Error("frontmatter is not a mapping");
+  return fm as Record<string, unknown>;
+}
+
+describe("SKILL.md frontmatter", () => {
+  const files = skillFiles();
+
+  it("finds the skills to check", () => {
+    expect(files).toContain("skills/thurview/SKILL.md");
+  });
+
+  it.each(files)("%s parses as YAML and names the skill", (path) => {
+    const fm = loadFrontmatter(readFileSync(`${repoRoot}${path}`, "utf8"));
+    expect(typeof fm["name"]).toBe("string");
+    expect(typeof fm["description"]).toBe("string");
+  });
+
+  it("keeps both document kinds in the thurview description", () => {
+    const fm = loadFrontmatter(readFileSync(`${repoRoot}skills/thurview/SKILL.md`, "utf8"));
+    const description = String(fm["description"]);
+    expect(description).toMatch(/review of a branch/);
+    expect(description).toMatch(/code explainer/);
+  });
+
+  it("rejects the unquoted `key: value` that broke the installer", () => {
+    // The exact shape shipped on main: `Two kinds: ` inside an unquoted
+    // scalar reads as a nested mapping, which no installer will load.
+    const broken = [
+      "---",
+      "name: thurview",
+      "description: A thing. Two kinds: a review, and an explainer.",
+      "---",
+      "",
+    ].join("\n");
+    expect(() => loadFrontmatter(broken)).toThrow(/mapping/);
+  });
+});