chore: add shared skills catalog (19 skills), installers, manifest, validator

validate.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+"""Validate dsh-skills catalog: each skills/<name>/SKILL.md frontmatter must
+carry required name and description, with kebab-case names (the contract
+enforced by @deepseek-ai/dsh-skill-filesystem). Exits non-zero on any issue."""
+import re
+import sys
+from pathlib import Path
+
+def main(root: str) -> int:
+    base = Path(root) / "skills"
+    if not base.is_dir():
+        print(f"no skills dir at {base}", file=sys.stderr)
+        return 1
+    errors = 0
+    examined = 0
+    for d in sorted(p for p in base.iterdir() if p.is_dir()):
+        md = d / "SKILL.md"
+        if not md.is_file():
+            print(f"[warn] {d.name}: missing SKILL.md", file=sys.stderr)
+            errors += 1
+            continue
+        examined += 1
+        text = md.read_text(encoding="utf-8")
+        m = re.match(r"^---\n([\s\S]*?)\n---", text)
+        if not m:
+            print(f"[error] {d.name}: no frontmatter", file=sys.stderr)
+            errors += 1
+            continue
+        fm = m.group(1)
+        name = re.search(r"^name:\s*(\S.*)$", fm, re.M)
+        desc = re.search(r"^description:\s*(\S.*)$", fm, re.M)
+        if not name:
+            print(f"[error] {d.name}: missing 'name'", file=sys.stderr)
+            errors += 1
+        else:
+            n = name.group(1).strip()
+            if n != d.name:
+                print(f"[error] {d.name}: frontmatter name '{n}' != dir name", file=sys.stderr)
+                errors += 1
+            if not re.fullmatch(r"[a-z0-9]+(-[a-z0-9]+)*", n):
+                print(f"[error] {d.name}: name not kebab-case: '{n}'", file=sys.stderr)
+                errors += 1
+        if not desc:
+            print(f"[error] {d.name}: missing 'description'", file=sys.stderr)
+            errors += 1
+    print(f"checked {examined} skills, {errors} problems")
+    return 1 if errors else 0
+
+if __name__ == "__main__":
+    root = sys.argv[1] if len(sys.argv) > 1 else "."
+    sys.exit(main(root))