fix: strip frontmatter from injected skill content and share parser from src

scripts/frontmatter.ts

@@ -1,42 +0,0 @@
-// Minimal YAML-subset frontmatter parser for upstream SKILL.md files.
-// Supports exactly what mattpocock/skills uses (census 2026-10-14, @49dd158): top-level
-// `key: value` scalars, double/single-quoted strings with \" escapes, and nested blocks
-// (e.g. `metadata:`) which are skipped. test/generate.test.ts asserts every vendored skill
-// parses with non-empty name+description, so an upstream format change fails the build
-// instead of silently producing a broken manifest.
-
-export type Frontmatter = Record<string, string>
-
-export function parseFrontmatter(content: string): { frontmatter: Frontmatter; body: string } {
-  const text = content.replace(/^\uFEFF/, "")
-  if (!text.startsWith("---\n") && !text.startsWith("---\r\n")) {
-    return { frontmatter: {}, body: text }
-  }
-  const end = text.indexOf("\n---", 3)
-  if (end === -1) return { frontmatter: {}, body: text }
-  const raw = text.slice(text.indexOf("\n") + 1, end + 1)
-  const body = text.slice(text.indexOf("\n", end + 1) + 1)
-
-  const frontmatter: Frontmatter = {}
-  for (const line of raw.split(/\r?\n/)) {
-    if (!line || /^\s/.test(line) || line.trim() === "---") continue // nested block or separator
-    const m = /^([A-Za-z][\w-]*):\s*(.*)$/.exec(line)
-    if (!m) continue
-    frontmatter[m[1]] = unquote(m[2].trim())
-  }
-  return { frontmatter, body }
-}
-
-function unquote(value: string): string {
-  if (value.length >= 2 && value.startsWith('"') && value.endsWith('"')) {
-    return value.slice(1, -1).replace(/\\"/g, '"').replace(/\\\\/g, "\\")
-  }
-  if (value.length >= 2 && value.startsWith("'") && value.endsWith("'")) {
-    return value.slice(1, -1).replace(/''/g, "'")
-  }
-  return value
-}
-
-export function isUserInvoked(frontmatter: Frontmatter): boolean {
-  return frontmatter["disable-model-invocation"] === "true"
-}

scripts/generate.ts

@@ -10,10 +10,18 @@
 //
 // Deterministic: same inputs produce byte-identical outputs, so the nightly git diff is the
 // affected-set report. Never hand-edit skills/ or the matrix section.
-import { cpSync, existsSync, readFileSync, readdirSync, rmSync, statSync, writeFileSync } from "node:fs"
+import {
+  cpSync,
+  existsSync,
+  readFileSync,
+  readdirSync,
+  rmSync,
+  statSync,
+  writeFileSync,
+} from "node:fs"
 import path from "node:path"
 import { fileURLToPath } from "node:url"
-import { isUserInvoked, parseFrontmatter } from "./frontmatter.ts"
+import { isUserInvoked, parseFrontmatter } from "../src/frontmatter.ts"
 
 const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..")