Complete v16.0.0: Hermes Agent support + multi-platform rebrand (#26)

Learnings applied from alirezarezvani/claude-skills: native SKILL.md agents
(Hermes, Vibe) install the files directly — no conversion — so support is a
sync script, not regenerated copies.

- scripts/sync-hermes-skills.py: stdlib installer that places skills/ into
  ~/.hermes/skills/ (copy or --link symlink, --flat, --dry-run). Hermes reads
  the same open SKILL.md standard and auto-discovers by description.
- README rebrand: title, tagline, intro, and a "works with" platforms badge now
  cover Claude, ChatGPT, Gemini, and Hermes. Works-With table splits native
  SKILL.md agents (Claude Code, Hermes) from paste-in chat LLMs. Repo name,
  marketplace ID, and install commands intentionally unchanged.
- Version bump to v16.0.0 (Multi-Platform). Note: v15.0.0 was already published
  (Skill Playground), so this release is v16.0.0; the changelog now also records
  v15.0.0 in its history. Updated README badge/What's-New, CHANGELOG, SECURITY,
  and playground tagline/meta.


Claude-Session: https://claude.ai/code/session_016JWn5jRD5tcEFKrubjQ6Px

Co-authored-by: Claude <noreply@anthropic.com>

scripts/sync-hermes-skills.py

@@ -0,0 +1,120 @@
+#!/usr/bin/env python3
+"""Install this library's skills into Hermes Agent (Nous Research).
+
+Hermes reads the same `SKILL.md` standard as Claude Code — it auto-discovers
+skills from its skills directory (default `~/.hermes/skills/`) using the
+`description` frontmatter. So there is **no format conversion**: this script just
+places the canonical `skills/<name>/` folders (SKILL.md + any scripts/) where
+Hermes can find them.
+
+Pure Python standard library — no dependencies, no network access.
+
+Examples
+--------
+    # Copy all skills into ~/.hermes/skills/pm-claude-skills/
+    python3 scripts/sync-hermes-skills.py
+
+    # Symlink instead (so `git pull` updates them in place)
+    python3 scripts/sync-hermes-skills.py --link
+
+    # Install into a custom location, un-namespaced (flat)
+    python3 scripts/sync-hermes-skills.py --target ./my-project/skills --flat
+
+    # See what would happen without writing anything
+    python3 scripts/sync-hermes-skills.py --dry-run
+
+Uninstall: delete the `pm-claude-skills/` folder inside the target directory.
+"""
+from __future__ import annotations
+
+import argparse
+import shutil
+import sys
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+SKILLS_DIR = REPO_ROOT / "skills"
+DEFAULT_TARGET = Path.home() / ".hermes" / "skills"
+NAMESPACE = "pm-claude-skills"
+
+
+def discover_skills() -> list[Path]:
+    """Return every skills/<name>/ folder that contains a SKILL.md."""
+    if not SKILLS_DIR.is_dir():
+        raise FileNotFoundError(f"Cannot find skills directory at {SKILLS_DIR}")
+    return sorted(p for p in SKILLS_DIR.iterdir() if (p / "SKILL.md").is_file())
+
+
+def install(skills: list[Path], dest: Path, *, link: bool, dry_run: bool) -> int:
+    count = 0
+    for skill in skills:
+        target = dest / skill.name
+        action = "symlink" if link else "copy"
+        if dry_run:
+            print(f"  would {action}: {skill.name} -> {target}")
+            count += 1
+            continue
+
+        # Replace any existing install so re-running is idempotent.
+        if target.is_symlink() or target.is_file():
+            target.unlink()
+        elif target.is_dir():
+            shutil.rmtree(target)
+
+        if link:
+            target.symlink_to(skill, target_is_directory=True)
+        else:
+            shutil.copytree(skill, target)
+        count += 1
+    return count
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(
+        description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter
+    )
+    parser.add_argument("--target", type=Path, default=DEFAULT_TARGET,
+                        help=f"Hermes skills directory (default: {DEFAULT_TARGET}).")
+    parser.add_argument("--flat", action="store_true",
+                        help=f"Install directly into --target instead of a '{NAMESPACE}/' subfolder.")
+    parser.add_argument("--link", action="store_true",
+                        help="Symlink each skill instead of copying (updates follow git pull).")
+    parser.add_argument("--dry-run", action="store_true",
+                        help="Show what would happen without writing anything.")
+    args = parser.parse_args(argv)
+
+    try:
+        skills = discover_skills()
+    except FileNotFoundError as exc:
+        print(f"Error: {exc}", file=sys.stderr)
+        return 1
+    if not skills:
+        print("No skills found to install.", file=sys.stderr)
+        return 1
+
+    dest = args.target if args.flat else args.target / NAMESPACE
+    print(f"{'[dry-run] ' if args.dry_run else ''}Installing {len(skills)} skills into {dest}")
+    if not args.dry_run:
+        dest.mkdir(parents=True, exist_ok=True)
+
+    count = install(skills, dest, link=args.link, dry_run=args.dry_run)
+
+    print(f"\n{'Would install' if args.dry_run else 'Installed'} {count} skills "
+          f"({'symlinked' if args.link else 'copied'}).")
+    if not args.dry_run:
+        print(f"Restart Hermes Agent — it auto-discovers SKILL.md skills from {args.target} "
+              f"and activates them by their description.")
+    return 0
+
+
+if __name__ == "__main__":
+    try:
+        rc = main()
+    except BrokenPipeError:
+        # Output was truncated by a closed pipe (e.g. `| head`); exit quietly.
+        try:
+            sys.stdout.close()
+        except Exception:
+            pass
+        rc = 0
+    raise SystemExit(rc)