Issues

• Python SDK loses the first SSE event type when the stream starts with a UTF-8 BOM

  external
  langchain-ai/langgraph#9225 · Filter by author Ra1nhy opened on Oct 7, 2026

• error_handler: a handled failure is still re-raised when the failing node shares its superstep with another node

  bugexternal
  Bug

  langchain-ai/langgraph#9218 · Filter by author yedlurisrinu opened on Oct 6, 2026
  1

• Documentation examples: invalid Agent Inbox response branch and undefined SDK cache TTL reference

  external
  langchain-ai/langgraph#9216 · Filter by author Ayushdevo opened on Oct 6, 2026

• error_handler type rejects handlers that take the injected error: NodeError parameter

  external
  langchain-ai/langgraph#9212 · Filter by author mohamed-abdo opened on Oct 6, 2026
  1

• sdk-py: sync thread stream gives a "gate timeout" error instead of the real error when run.start fails

  bugexternal
  Bug

  langchain-ai/langgraph#9209 · Filter by author patrickmao1 opened on Oct 5, 2026

• Sync threads.stream() ignores run_start_timeout

  bugexternal
  Bug

  langchain-ai/langgraph#9208 · Filter by author patrickmao1 opened on Oct 5, 2026
  1

• error_handler can silently swallow a later unhandled exception after Python reuses its object id

  bugexternal
  Bug

  langchain-ai/langgraph#9207 · Filter by author yifanxiong272 opened on Oct 5, 2026
  2

• Command.PARENT from a subgraph error_handler leaks ParentCommand instead of routing

  bugexternal
  Bug

  langchain-ai/langgraph#9202 · Filter by author yifanxiong272 opened on Oct 4, 2026
  1

• [BUG] Resuming after a tool error re-runs the tool node, repeating a side effect that already happened

  bugexternal
  Bug

  langchain-ai/langgraph#9185 · Filter by author FurkhanShaikh opened on Oct 4, 2026
  12

• PostgresStore and SqliteStore don't backfill non-indexed items on vector search (diverges from InMemoryStore)

  bugexternal
  Bug

  langchain-ai/langgraph#9184 · Filter by author thanay-sisir opened on Oct 4, 2026
  3

• durability="exit" stores a resumed run's loaded writes twice on DeltaChannel

  bugexternal
  Bug

  langchain-ai/langgraph#9183 · Filter by author thanay-sisir opened on Oct 4, 2026
  1

• Checkpoint saved at an interrupt_after pause is never emitted on the checkpoints / debug stream

  external
  langchain-ai/langgraph#9180 · Filter by author jayhemnani9910 opened on Oct 3, 2026
  1

• bug: Send.__hash__ raises TypeError: unhashable type: 'dict' on standard dictionary payloads

  bugexternal
  Bug

  langchain-ai/langgraph#9178 · Filter by author codeCraft-Ritik opened on Oct 3, 2026
  5

• bug: create_react_agent crashes with AttributeError on pre-bound BaseTool instances in model.kwargs["tools"]

  bugexternal
  Bug

  langchain-ai/langgraph#9177 · Filter by author codeCraft-Ritik opened on Oct 3, 2026
  2

• StateGraph._is_field_binop rejects valid reducers like set.union, functions with default args, and variadics`

  bugexternal
  Bug

  langchain-ai/langgraph#9176 · Filter by author codeCraft-Ritik opened on Oct 3, 2026
  1

• Command.__repr__ calls asdict(self) causing TypeError: cannot pickle on unpicklable state and expensive deepcopy`

  bugexternal
  Bug

  langchain-ai/langgraph#9175 · Filter by author codeCraft-Ritik opened on Oct 3, 2026
  2

• DeltaChannel: make snapshot vs delta a storage detail below the channel API

  internal
  langchain-ai/langgraph#9174 · Filter by author eliornl opened on Oct 3, 2026
  2

• Traced conditional edges that return Send log repr() of the full payload (N × state size), with no way to opt out

  bugexternal
  Bug

  langchain-ai/langgraph#9173 · Filter by author Nicolas-Ding opened on Oct 2, 2026
  1

• Python SDK runs.join_stream loses stream modes when passed a list

  bugexternal
  Bug

  langchain-ai/langgraph#9172 · Filter by author Thijsvandepoll opened on Oct 2, 2026
  4

• Headless tool results dropped when the resume is sent immediately after the interrupt

  bugexternal
  Bug

  langchain-ai/langgraph#9164 · Filter by author ashhugoel opened on Oct 1, 2026
  4

• GraphRecursionError raised after the graph already finished when it ends on the last allowed step

  external
  langchain-ai/langgraph#9163 · Filter by author jayhemnani9910 opened on Oct 1, 2026
  1

• ToolNode: test_tool_node_node_interrupt's assertion never runs (dead code inside pytest.raises block)

  external
  langchain-ai/langgraph#9161 · Filter by author mathewOracle opened on Oct 1, 2026
  2

• InMemoryStore equality filters treat JSON booleans as the numbers 0 and 1

  bugexternal
  Bug

  langchain-ai/langgraph#9143 · Filter by author Marcuswang0824 opened on Oct 1, 2026
  2

• CLI: langgraph build fails when a local dependency ships its own requirements.txt

  external
  langchain-ai/langgraph#9122 · Filter by author HelmiDev03 opened on Sep 30, 2026
  1

• docs(examples): address prompt-injection spend bypass in customer support tutorial with tool-boundary guards

  external
  langchain-ai/langgraph#9120 · Filter by author zariffromlatif opened on Sep 30, 2026
  3