Akshat8510 30b2ed3ef8 fix(web): allow session resume without new message ...

Merge https://github.com/google/adk-python/pull/4185

**Description**
 This PR resolves #4100 by making the `new_message` field optional in the `RunAgentRequest` model.

 **The Problem:**
 When attempting to resume an agent session via the FastAPI web server, the request would fail with a `422 Unprocessable Entity` if `new_message` was omitted. This prevented "resume-only" workflows where a user just wants to wake up an existing session.

 **The Solution:**
 Updated `RunAgentRequest.new_message` to be `Optional[types.Content] = None`. The underlying `runner.run_async` logic already supports `None` for resuming purposes, so no further logic changes were required.

 **Verification:**
 Verified that `RunAgentRequest` now validates successfully when `new_message` is missing, defaulting the field to `None`.

Co-authored-by: Liang Wu <wuliang@google.com>
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/adk-python/pull/4185 from Akshat8510:fix/fastapi-resume-4100 b6d252636aa5f96186507fccf47a278fe733a362
PiperOrigin-RevId: 869761179

2026-02-13 09:11:51 -08:00

..

integration

fix: propagate grounding and citation metadata in streaming responses

2026-02-10 14:36:21 -08:00

unittests

fix(web): allow session resume without new message

2026-02-13 09:11:51 -08:00

__init__.py

chore: Upgrade to headers to 2026

2026-01-20 14:50:09 -08:00