feat(skills): add skill-porting library skill (#195)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

packages/docs/content/skills.en.md

@@ -69,6 +69,7 @@ The built-in Skills, by group (the group manifest is `SKILL_GROUPS` in `packages
 | | `vllm` | Deploy and serve LLMs with vLLM behind an OpenAI-compatible endpoint, with tool calling enabled for agent workloads |
 | | `ollama` | Deploy and serve local models with Ollama: pull and run them, then expose the OpenAI-compatible endpoint to apps and agents |
 | | `llamafactory` | Fine-tune LLMs with LlamaFactory: register datasets, train via YAML configs, merge LoRA adapters and serve the result |
+| | `skill-porting` | Port skills from external sources — plugin marketplaces, skills.sh registries, GitHub repos or local folders — into the agent after review and normalization |
 | Agent Tuning | `agent-creation` | Create or configure an Agent State from a user requirement by writing AGENTS.md, setting identity metadata and installing needed Skills |
 | | `benchmark-design` | Design and calibrate a multi-Case capability Benchmark for a specified Agent and establish a traceable Formal Baseline |
 | | `agent-evaluation` | Internal leaf worker that executes and privately scores exactly one Case run from a complete evaluation protocol |