Skip to content

fix(models): Allow context caches with empty content prefixes #6367

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
hxaxd wants to merge 4 commits into
base: main
Choose a base branch
from
+3 −1
Open

fix(models): Allow context caches with empty content prefixes #6367

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
7b2808b
fix(models): Allow instruction-only context caches
hxaxd Jul 10, 2026
a904efd
Merge branch 'main' into fix/gemini-cache-empty-contents
hxaxd Jul 10, 2026
fbf13fb
Merge branch 'main' into fix/gemini-cache-empty-contents
rohityan Jul 10, 2026
4dbbc91
Merge branch 'main' into fix/gemini-cache-empty-contents
rohityan Jul 11, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion src/google/adk/models/gemini_context_cache_manager.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -447,7 +447,7 @@ async def _create_gemini_cache(

with tracer.start_as_current_span("create_cache") as span:
# Prepare cache contents (first N contents + system instruction + tools)
cache_contents = llm_request.contents[:cache_contents_count]
cache_contents = llm_request.contents[:cache_contents_count] or None

cache_config = types.CreateCachedContentConfig(
contents=cache_contents,
Expand Down
2 changes: 2 additions & 0 deletions tests/unittests/agents/test_gemini_context_cache_manager.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -989,6 +989,8 @@ async def test_fingerprint_only_metadata_transitions_to_active_cache(
assert result_2.contents_count == 0 # Preserved from prefix
assert result_2.invocations_used == 1
self.manager.genai_client.aio.caches.create.assert_called_once()
create_call = self.manager.genai_client.aio.caches.create.call_args
assert create_call.kwargs["config"].contents is None

async def test_dynamic_instruction_does_not_break_initial_cache_fingerprint(
self,
Expand Down
Loading