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feat(plugins): add missing @override decorators to LoggingPlugin callback methods

tracing[Component] This issue is related to OpenTelemetry tracing[Component] This issue is related to OpenTelemetry tracing

Status: Open.

Feature

#4496 In google/adk-python;

· cchinchilla-dev opened on Feb 14, 2026

SequentialAgent serialization error

core[Component] This issue is related to the core interface and implementation[Component] This issue is related to the core interface and implementation

Status: Open.

Bug

#4493 In google/adk-python;

· Calcifer777 opened on Feb 14, 2026

<code>AgentTool</code> should support passing data files to sub-agents with <code>optimize_data_file</code> code executors

core[Component] This issue is related to the core interface and implementation[Component] This issue is related to the core interface and implementation

Status: Open.

Feature

#4488 In google/adk-python;

· vinismarques opened on Feb 13, 2026

Missing artifacts when state returned

services[Component] This issue is related to runtime services, e.g. sessions, memory, artifacts, etc[Component] This issue is related to runtime services, e.g. sessions, memory, artifacts, etc

Status: Open.

Bug

#4487 In google/adk-python;

· davidjsanders opened on Feb 13, 2026

Agent engine + MCP is broken on 1.25.0

agent engine[Component] This issue is related to Vertex AI Agent Engine[Component] This issue is related to Vertex AI Agent Engine

mcp[Component] Issues about MCP support[Component] Issues about MCP support

tools[Component] This issue is related to tools[Component] This issue is related to tools

Status: Open.

Bug

#4486 In google/adk-python;

· rrondir opened on Feb 13, 2026

LiteLLM streaming silently drops tool call responses when <code>finish_reason</code> is <code>"length"</code> (max output tokens reached)

models[Component] Issues related to model support[Component] Issues related to model support

Status: Open.

Bug

#4482 In google/adk-python;

· GitMarco27 opened on Feb 13, 2026

Error serializing to JSON - can't encode character '\udcc3'

models[Component] Issues related to model support[Component] Issues related to model support

Status: Open.

Bug

#4480 In google/adk-python;

· cl3m3nt opened on Feb 13, 2026

Automatic A2A SecurityScheme &amp; Skill Security Support in AgentCardBuilder

a2a[Component] This issue is related a2a support inside ADK.[Component] This issue is related a2a support inside ADK.

Status: Open.

Feature

#4479 In google/adk-python;

· djanito opened on Feb 13, 2026

VertexAiSessionService fails with ValidationError when using EventsCompactionConfig and ContextCacheConfig in ADK App

agent engine[Component] This issue is related to Vertex AI Agent Engine[Component] This issue is related to Vertex AI Agent Engine

Status: Open.

Bug

#4477 In google/adk-python;

· bgautham-dev opened on Feb 13, 2026

Concur OAuth2 code exchange fails in ADK: 'str' object has no attribute 'get' (client_secret_post)

auth[Component] This issue is related to authorization[Component] This issue is related to authorization

Status: Open.

Bug

#4473 In google/adk-python;

· YutaMiyake opened on Feb 13, 2026

Auth/confirmation resume ignores skip_summarization on re-executed tool response

core[Component] This issue is related to the core interface and implementation[Component] This issue is related to the core interface and implementation

Status: Open.

Bug

#4472 In google/adk-python;

· halfpasttense opened on Feb 12, 2026

Plugin callbacks (before_agent, after_agent, before_model, after_model, etc.) not being invoked by InMemoryRunner

core[Component] This issue is related to the core interface and implementation[Component] This issue is related to the core interface and implementation

Status: Open.

Bug

#4464 In google/adk-python;

· sssahas opened on Feb 12, 2026