Summary

Support the !command`` syntax in skills to inject dynamic content at load time, compatible with Claude Code's implementation.

Example

---
name: project-context
description: Provides current project context
---

Current branch: !`git branch --show-current`
Current date: !`date`

When loaded, commands are executed and output replaces the placeholder.

Considerations

• Request bash permission for each command
• Timeout and abort signal support
• Output truncation for large outputs