build(deps): bump ag-ui-langgraph from 0.0.41 to 0.0.42

[dependabot]

Bumps ag-ui-langgraph from 0.0.41 to 0.0.42.

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[srtab]

@daiv-agent what's the implications upgrading this package?

[daiv-agent]

Confirmed: copilotkit.LangGraphAGUIAgent is a subclass of ag_ui_langgraph.LangGraphAgent. This is the critical coupling point — daiv's RuntimeContextLangGraphAGUIAgent extends LangGraphAGUIAgent, which extends LangGraphAgent, and overrides get_stream_kwargs. The 0.0.42 release modifies get_stream_kwargs in agent.py.

I now have everything needed to give a complete assessment.

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Implications of upgrading ag-ui-langgraph 0.0.41 → 0.0.42

This is a patch bump but it carries non-trivial behavioral changes in the exact code paths daiv depends on. daiv is tightly coupled to this package — not just as a transitive dep, but through a subclass and a large workaround layer. Here's the breakdown.

How daiv uses the package

• daiv doesn't call ag_ui_langgraph directly. It subclasses copilotkit.LangGraphAGUIAgent (itself a subclass of ag_ui_langgraph.LangGraphAgent) in daiv/chat/api/streaming.py:40, and overrides get_stream_kwargs to inject a RuntimeCtx dataclass as context.
• daiv/chat/api/event_filter.py is a ~150-line filter that exists entirely to patch three upstream bugs in ag_ui_langgraph's event translation (dropped TOOL_CALL_START on text→tool transitions, nested subgraph leakage, and misrouted args for parallel tool calls).
• daiv/chat/turns.py:93 mirrors the shapes ag_ui_langgraph.resolve_reasoning_content recognizes.
• The diff_to_metadata graph relies on emit-messages: False being honored by ag_ui_langgraph (daiv/automation/agent/diff_to_metadata/graph.py:134).

What changed upstream (0.0.41 → 0.0.42)

I pulled the actual source diff. Four files changed in the ag_ui_langgraph package:

1. agent.py — get_stream_kwargs (the method daiv overrides): Now also accepts context when astream_events exposes it via **kwargs (VAR_KEYWORD), not just a named context parameter. daiv's override calls super().get_stream_kwargs() and then setdefault("context", ...), so this is compatible — daiv's setdefault still wins. Low risk, but it's the exact method daiv subclasses.

2. agent.py — prepare_regenerate_stream: Now merges the caller's config under the fork (merge_configs(config, fork)) so recursion_limit and callbacks aren't dropped. Fixes upstream #1749. This is a pure bug fix; daiv doesn't override this method. Beneficial.

3. agent.py — tool call event message_id/parent_message_id: TOOL_CALL_RESULT and TOOL_CALL_START now use str(tool_msg.id or tool_msg.tool_call_id) instead of a fresh uuid4(), so MESSAGES_SNAPSHOT merge works. This changes the values of message_id/parent_message_id on the wire. daiv's SubagentEventFilter keys dedup logic on tool_call_id (not message_id), so the filter should be unaffected — but the chat-stream.js client and turns.py should be checked if they ever key off message_id.

4. agent.py + utils.py — reasoning content handling: Substantial rework of resolve_reasoning_content and the message converters (langchain_messages_to_agui / agui_messages_to_langchain). Reasoning blocks now round-trip as standalone ReasoningMessages with the provider's canonical id (rs_…), and handle_reasoning_event now stashes a pending_reasoning_id for text-less chunks. daiv's turns.py only mirrors the shapes resolve_reasoning_content recognizes (for its own _reasoning_from_additional_kwargs); it doesn't call the upstream function. The shapes it mirrors are unchanged (still reasoning.summary[*].text and reasoning_content string), so turns.py is safe.

5. a2ui_tool.py — A2UI tool became async / streaming: generate_a2ui is now async and streams the subagent. daiv does not use get_a2ui_tools at all (no imports of it in daiv/), so this is irrelevant to daiv.

6. New transitive dep: ag-ui-a2ui-toolkit bumped 0.0.3 → 0.0.4 and is now imported by agent.py (split_a2ui_schema_context). It was already a transitive dep of ag-ui-langgraph, so the lock update is expected.

Risk assessment

Area	Risk	Notes
get_stream_kwargs override	Low	daiv's setdefault("context", ...) still takes precedence; upstream's **kwargs path is additive
SubagentEventFilter workarounds	Medium — needs verification	The filter patches upstream bugs #1 (dropped TOOL_CALL_START) and #3 (parallel-call arg misrouting). 0.0.42 does not fix these — the changed code is in on_tool_end re-emit and reasoning, not in on_chat_model_stream's tool-call-start detection. The filter is still needed. But the message_id value change (#3 above) means the filter's dedup-by-tool_call_id logic should be re-verified against the new wire format.
Reasoning round-trip	Low	turns.py mirrors shapes that are unchanged; daiv doesn't call the changed functions
prepare_regenerate_stream	Low (beneficial)	Pure bug fix; daiv doesn't override it
A2UI tool	None	daiv doesn't use get_a2ui_tools
Lockfile / deps	Low	ag-ui-a2ui-toolkit 0.0.3→0.0.4 is already a transitive dep

Recommendation

The upgrade is safe to take but is not a no-op. Before merging:

1. Run the chat unit tests — tests/unit_tests/chat/api/test_event_filter.py and test_streaming.py are the regression net for the workaround layer. These must pass unchanged. (I couldn't run them here — uv/deps aren't installed in this sandbox.)
2. Manually verify a multi-tool-call turn in the chat UI, since the message_id/parent_message_id wire values changed and the filter's correctness depends on the upstream event sequence staying the same.
3. The SubagentEventFilter workarounds (bugs Added ability to the assistant ask questions to the user on the discussion. #1 and Create dependabot.yml #3) are still required — 0.0.42 doesn't touch on_chat_model_stream's tool-call-start path. Don't remove the filter.

If the unit tests pass, this is a low-risk upgrade that brings a useful prepare_regenerate_stream fix. If you want, I can attempt to install deps and run the chat test suite to confirm.