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Author SHA1 Message Date
Hangfei LinandCopybara-Service 2b0f953255 feat: Add artifact metadata support and a new sample for context offloading 
Enhanced `save_artifact` in `callback_context.py` to accept `custom_metadata` and added `get_artifact_version` to retrieve artifact details.

Introduced a new sample, `context_offloading_with_artifact`, demonstrating how to use ADK artifacts to offload large data from the LLM context. The sample includes:
-   `QueryLargeDataTool`: Generates mock sales reports, saves them as artifacts with custom metadata, and injects the artifact content into the LLM request immediately after creation.
-   `CustomLoadArtifactsTool`: Provides summaries of available artifacts to the LLM based on metadata and loads artifact content on demand when `load_artifacts` is called.

Co-authored-by: Hangfei Lin <hangfei@google.com>
PiperOrigin-RevId: 830592786
 2025-11-10 14:10:10 -08:00
Xiang (Sean) ZhouandCopybara-Service b977d12ea8 refactor: Add save_credential and load_credential in callback context for developer to access credential service 
developer may want to save/load credentials themselves to/from credential service. see (https://github.com/google/adk-python/issues/1816)

PiperOrigin-RevId: 783487628
 2025-07-15 15:09:19 -07:00
Xiang (Sean) ZhouandCopybara-Service 30d7b37069 refactor: Move list_artifacts from tool_context to callback_context 
1. users may want to list_artifacts in callbacks
2. save/load artifacts are already in callback_context

PiperOrigin-RevId: 783399941
 2025-07-15 11:08:17 -07:00