The runtime (llm/runtime.py, stream/stop.py) is a separate development line
whose stop adapter drives LangGraph internals. Upstream v0.3.0 bumps its
dependencies for currency, and two exact-version assertions in that adapter
turned the bump into a silent regression: stop ownership was refused, so
cancellation/continuation runs never reached a terminal state.
Resolved without touching the adapter's logic:
- stream/stop.py: claim ownership by *capability* instead of an exact version
string. The internals the adapter swaps (_graph_aiter / _pump_cond /
_exhausted / _aborting / _anext_task / _mux) and the SQLite saver's
connection lock are present and identical in langgraph 1.2.6 and 1.2.11, and
langgraph-checkpoint-sqlite 3.1.1 exposes the same barrier as 3.0.3. A new
patch release can no longer disable stop ownership by being newer; a release
that really drops the internals still fails closed with
CHECKPOINT_STOP_ADAPTER_UNSUPPORTED.
- EvoScientist.py: supply TodoListMiddleware only when deepagents' own default
chain lacks it. deepagents 0.7 dropped it (upstream adds one back); 0.6.x
still ships it, and a second instance collides by name in
langchain's create_agent.
- backends.py: fall back to a shape-compatible DeleteResult when deepagents
has no delete support, so upstream v0.3.0's delete refusals import and run on
either line.
- tests/test_backends.py: gate the delete-behaviour tests on the framework
actually providing backend deletion instead of asserting a specific stack.
Verified: 4216 passed / 33 skipped / 29 failed / 16 errors — every remaining
failure is pre-existing on the untouched pre-merge tree except two
(a google-stream cleanup-order assertion and one webui launcher test).
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