This is useful for injecting artifacts and session state variable into instruction template typically in instruction providers.
PiperOrigin-RevId: 761595473
When the user provides instruction provider, we assume that they will inject the session state parameters if needed. This assumption allows users to return code snippets in the instruction provider without any template replacement.
PiperOrigin-RevId: 759705471
Also included a token_usage sample that showcases the token usage of subagents with different models under a parent agent.
PiperOrigin-RevId: 759347015
(before/after) tool callbacks are invoked throughout the provided chain until one callback does not return None. Callbacks can be async and sync.
PiperOrigin-RevId: 756526507
(before/after) agent callbacks are invoked throughout the provided chain until one callback does not return None. Callbacks can be async and sync.
PiperOrigin-RevId: 756359693
(before/after) model callbacks are invoked throughout the provided chain until one callback does not return None. Callbacks can be async and sync.
PiperOrigin-RevId: 755565583
