feat: add ClawHub skill for searching and installing agent skills from the public registry

nanobot/skills/README.md

@@ -21,4 +21,5 @@ The skill format and metadata structure follow OpenClaw's conventions to maintai
 | `weather` | Get weather info using wttr.in and Open-Meteo |
 | `summarize` | Summarize URLs, files, and YouTube videos |
 | `tmux` | Remote-control tmux sessions |
+| `clawhub` | Search and install skills from ClawHub registry |
 | `skill-creator` | Create new skills |

nanobot/skills/clawhub/SKILL.md

@@ -0,0 +1,53 @@
+---
+name: clawhub
+description: Search and install agent skills from ClawHub, the public skill registry.
+homepage: https://clawhub.ai
+metadata: {"nanobot":{"emoji":"🦞"}}
+---
+
+# ClawHub
+
+Public skill registry for AI agents. Search by natural language (vector search).
+
+## When to use
+
+Use this skill when the user asks any of:
+- "find a skill for …"
+- "search for skills"
+- "install a skill"
+- "what skills are available?"
+- "update my skills"
+
+## Search
+
+```bash
+npx --yes clawhub@latest search "web scraping" --limit 5
+```
+
+## Install
+
+```bash
+npx --yes clawhub@latest install <slug> --workdir ~/.nanobot/workspace
+```
+
+Replace `<slug>` with the skill name from search results. This places the skill into `~/.nanobot/workspace/skills/`, where nanobot loads workspace skills from. Always include `--workdir`.
+
+## Update
+
+```bash
+npx --yes clawhub@latest update --all --workdir ~/.nanobot/workspace
+```
+
+## List installed
+
+```bash
+npx --yes clawhub@latest list --workdir ~/.nanobot/workspace
+```
+
+## Notes
+
+- Requires Node.js (`npx` comes with it).
+- No API key needed for search and install.
+- Login (`npx --yes clawhub@latest login`) is only required for publishing.
+- `--workdir ~/.nanobot/workspace` is critical — without it, skills install to the current directory instead of the nanobot workspace.
+- After install, remind the user to start a new session to load the skill.