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# Python Analytics Skills - Plugin Development
## Adding a New Skill
1. Create a directory under `skills/`:
```
skills/your-skill-name/
├── SKILL.md # Required: main instructions
└── references/ # Optional: detailed reference docs
```
2. `SKILL.md` must have YAML frontmatter with `name` and `description`:
```yaml
---
name: your-skill-name
description: >
When to trigger this skill. Include keywords and task descriptions
that help the assistant decide when to load it.
---
```
3. The `name` field must match the directory name exactly.
4. Add the skill path to `.claude-plugin/marketplace.json` in the `skills` array:
```json
"skills": [
"./skills/pymc-modeling",
"./skills/marimo-notebook",
"./skills/your-skill-name"
]
```
5. Add an entry to `skills.json`.
6. Run `./install.sh --validate` to verify.
## Skill Structure Requirements
- `SKILL.md` is the entry point -- keep it focused and actionable
- Put detailed reference material in `references/*.md` and link from SKILL.md
- Description should be under 1024 characters
- Include trigger phrases in the description (keywords that indicate when the skill should activate)
## Testing Locally
```bash
# Validate structure
./install.sh --validate
# Test as a plugin
claude --plugin-dir .
# Test hooks
echo '{"user_prompt": "test prompt"}' | bash hooks/suggest-skill.sh
```
## Hook Development
Hooks live in `hooks/hooks.json`. The plugin uses `UserPromptSubmit` to suggest skills.
To add a new hook:
1. Add the hook configuration to `hooks/hooks.json`
2. If using a command hook, create the script and make it executable
3. Use `${CLAUDE_PLUGIN_ROOT}` for all file paths (never hardcode)
4. Hooks must exit 0 -- failures should be handled gracefully
5. Set appropriate timeouts (default: 60s for commands, 30s for prompts)
6. Restart Claude Code to pick up hook changes (hooks load at session start)
See the [hook-development skill](https://github.com/anthropics/claude-plugins-official) for full reference.
