ToolWatcher

strands_agents::tools::loader

Struct ToolWatcher 

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pub struct ToolWatcher { /* private fields */ }
Expand description

Tool watcher for monitoring tool changes during development.

This implementation provides a callback-based notification system for tool changes. Unlike the Python SDK which uses watchdog for automatic file system monitoring, Rust tools are typically compiled and don’t support runtime hot-reloading.

This watcher is useful for:

  • Notifying when tools are programmatically reloaded
  • Integration with external file watchers (e.g., notify crate)
  • Development-time tooling that manages tool lifecycle

For automatic file watching, integrate with the notify crate and call notify_modified when file changes are detected.

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impl ToolWatcher

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pub fn new(loader: ToolLoader) -> Self

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pub fn on_reload(self, callback: ReloadCallback) -> Self

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pub fn loader(&self) -> &ToolLoader

Get the tool loader.

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pub fn loader_mut(&mut self) -> &mut ToolLoader

Get mutable reference to the tool loader.

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pub fn notify_modified(&self, tool_name: &str)

Notify that a tool has been modified.

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pub fn watched_dirs(&self) -> &[PathBuf]

Get the directories being watched.

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