feat(runner): add NewInMemory convenience constructor#1133
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Mirror adk-python's InMemoryRunner: NewInMemory wires the in-memory session, artifact, and memory services and enables session auto-creation, so local development and tests can build a Runner without manually assembling services or pre-creating a session. Auto-creation is required (not just a default) because the helper owns its services and exposes no accessor on Runner; without it the returned Runner's first Run would always fail with "session not found" and the caller would have no way to recover. Purely additive and backward-compatible; runner.New is unchanged.
hanorik
approved these changes
Jul 8, 2026
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Problem:
runner.Newrequires callers to assemble and pass services explicitly andfails when
SessionServiceis nil (runner/runner.go:95). There is noPython/Java-style
InMemoryRunnerconvenience that auto-wires in-memoryservices, so every local/dev/test setup must construct the session, artifact,
and memory services (and pre-create a session) by hand.
Solution:
Add
runner.NewInMemory(appName, agent), mirroring adk-python'sInMemoryRunner. It wires the in-memory session, artifact, and memory servicesand enables session auto-creation, so a
Runnercan be built and run with zeromanual service/session setup. Auto-creation is required (not merely a default)
because the helper owns its services and
Runnerexposes no service accessor;without it the first
Runwould always fail with "session not found" and thecaller could not recover. The change is purely additive and
backward-compatible —
runner.Newis unchanged.