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It is hoped that the Agent supports requests for configuring third-party models

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

Status: Open.

Feature

#4180 In google/adk-python;

· WDEP-good opened on Jan 16, 2026

FunctionCallingConfig(mode="ANY") causes infinite tool-calling loop when sub-agent is used as a tool (google-adk 1.21.0)

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

#4179 In google/adk-python;

· marttinslucas opened on Jan 16, 2026

Persistent 429 / Occasional 503 Errors Cause Agent Workflow & Context Corruption

workflow

Status: Open.

Bug

#4178 In google/adk-python;

· abhijith2599 opened on Jan 16, 2026

adk migrate session` fails with greenlet_spawn error when using async driver URLs

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

#4176 In google/adk-python;

· veevortexiq opened on Jan 16, 2026

[BUG] LiteLLM (OpenAI/gpt-4o-mini): load_artifacts PDF attachment fails with “Invalid file data: 'file_id' … expected application/pdf, got None”

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

Status: Open.

Bug

#4174 In google/adk-python;

· kursatdinc opened on Jan 16, 2026

Agent incorrectly invokes hallucinated tool instead of proper validation

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

#4173 In google/adk-python;

· lurongjiang opened on Jan 16, 2026

[Bug] 500 Internal Server Error on /openapi.json: PydanticSchemaGenerationError for ClientSession

web[Component] This issue will be transferred to adk-web[Component] This issue will be transferred to adk-web

Status: Open.

Bug

#4172 In google/adk-python;

· AITutor3 opened on Jan 16, 2026

wrong agent to start a new invocation when last invocation was rewound

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

request clarification[Status] The maintainer need clarification or more information from the author[Status] The maintainer need clarification or more information from the author

Status: Open.

Bug

#4169 In google/adk-python;

· chelxxx opened on Jan 15, 2026

VertexAiMemoryBankService is not configured in Agent Engine

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

Status: Open.

Bug

#4167 In google/adk-python;

· mariia-coding opened on Jan 15, 2026

OpenAPIToolset automatically converts camelCase to snake_case with no option to disable

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

Status: Open.

Feature

#4166 In google/adk-python;

· adrianthompson-lh opened on Jan 15, 2026

ADK Session should have display_name and align with AgentEngine Sessions interface

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

Status: Open.

Feature

#4164 In google/adk-python;

· ashubham opened on Jan 15, 2026

ADK doesn't report errors from McpToolset

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

#4162 In google/adk-python;

· shobsi opened on Jan 14, 2026