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3423 Commits
Author SHA1 Message Date
Christian Bromann 8e2f23e051 move more over 2026-04-27 08:02:59 -07:00
Christian Bromann cdec5bf336 copy correctly 2026-04-23 18:47:18 -07:00
Christian Bromann f30a11055b use cause in lifecycle 2026-04-23 16:13:49 -07:00
Nick Hollon 1bf0f1b7f8 Match MessagesTransformer scope filter to JS root-feed semantics 
Commit 133082af preserved the full checkpoint ns on v2 message
events so subgraph chat-model tokens emit at their full path (matching
JS's handleChatModelStart). That promoted root-level chat tokens from
the empty tuple to depth 1 (e.g. ("call_model:<task>",)), but the root
MessagesTransformer was scope_exact=True at scope=(), so every
streamed message was dropped — run.messages yielded zero streams for
any graph calling model.invoke() / stream_v2().

Mirror JS's namespaces=[[]], depth=1 filter: accept events at the
transformer's scope or exactly one segment deeper. SubgraphTransformer
still forwards deeper events to the matching child mini-mux, whose
own MessagesTransformer applies the same scope+1 rule.

Also update stale test assertions: ChatModelStream.output.content is
now always a list of v1 content blocks by construction, so tests
compare via str(stream.text) (sync) or an explicit block-shape
assertion on the assembled AIMessage (async, since AsyncProjection
isn't str-able).
 2026-04-23 09:49:25 -04:00
Christian Bromann 133082af71 fix(langgraph): preserve full checkpoint ns on v2 message events 
`StreamMessagesHandlerV2` inherited v1's `on_chat_model_start` /
`on_chain_start`, which slice the ns tuple with `[:-1]`. On the
protocol-v2 wire this stripped subgraph chat-model deltas down to
one level (`["research:<uuid>"]`), slipping them through the JS
client's `namespaces=[[]], depth=1` root-feed filter and polluting
the main conversation with subgraph tokens.

Override both methods on the v2 class to keep the full
`tuple(task_checkpoint_ns.split(NS_SEP))`, matching JS's
`handleChatModelStart` in `libs/langgraph-core/src/pregel/messages-v2.ts`.
The v1 handler and the stripped `langgraph_checkpoint_ns` metadata
field are unchanged.
 2026-04-22 18:12:06 -07:00
Nick Hollon de72fb4b4b Broaden compile(transformers=...) signature to accept scope-aware factories 2026-04-20 16:34:14 -04:00
Nick Hollon 221ab0c9ad Merge branch 'nh/subgraph-lifecycle' into nh/tools-channel-streaming 
# Conflicts:
#	libs/langgraph/langgraph/stream/__init__.py
#	libs/langgraph/langgraph/stream/graph_streamer.py
#	libs/langgraph/langgraph/stream/run_stream.py
#	libs/langgraph/tests/test_graph_streamer.py
#	libs/langgraph/tests/test_pregel_stream_v2.py
#	libs/langgraph/tests/test_stream_messages_transformer.py
#	libs/langgraph/tests/test_stream_subgraph_transformer.py
#	libs/langgraph/tests/test_streaming_handler.py
 2026-04-20 16:31:29 -04:00
Nick Hollon 2982512adb Merge branch 'nh/messages-content-blocks' into nh/subgraph-lifecycle 
# Conflicts:
#	libs/langgraph/langgraph/stream/streaming_handler.py
#	libs/langgraph/tests/test_pregel_stream_v2.py
 2026-04-20 16:22:18 -04:00
Nick Hollon 4956512692 Merge branch 'nh/streaming-transformer' into nh/messages-content-blocks 
# Conflicts:
#	libs/langgraph/langgraph/stream/streaming_handler.py
 2026-04-20 16:13:08 -04:00
Nick Hollon 40055e92cc feat(langgraph): move stream_v2/astream_v2 onto Pregel, drop StreamingHandler 
Compile-time `transformers=` on `StateGraph.compile` now registers
transformer factories directly on the compiled graph. `stream_v2` and
`astream_v2` live on Pregel and read the stashed list, so callers no
longer need a separate wrapper to drive the transformer pipeline.
 2026-04-20 16:08:19 -04:00
Nick Hollon 66e6c27155 fix(stream): replace pump lock with condition-based take-a-number 
The async pump serialized `graph_aiter.__anext__()` with an
`asyncio.Lock`, held across the full await. When two cursors read
different projections concurrently, the "losing" task slept inside
`_apump_next` on the lock itself — so when the active pumper pushed
its data onto the losing task's buffer, the loser couldn't observe it
until another graph event forced the lock to change hands. Each
passive consumer saw its deltas one graph event late; bursts
coalesced at turn boundaries instead of streaming live.

Switch to an `asyncio.Condition` + `_pumping` flag. Exactly one task
is the active pumper; others do `cond.wait()` and are notified after
every pump step. Passive consumers wake as soon as their buffer
fills, drop out of `_apump_next`, and let the iterator's buffer check
yield the data. Single-consumer behavior is unchanged; multi-
consumer throughput improves ~5x on bursty tools and no events are
lost.
 2026-04-20 13:59:09 -04:00
Nick Hollon f4a5d56535 fix(stream): replace pump lock with condition-based take-a-number 
The async pump serialized `graph_aiter.__anext__()` with an
`asyncio.Lock`, held across the full await. When two cursors read
different projections concurrently, the "losing" task slept inside
`_apump_next` on the lock itself — so when the active pumper pushed
its data onto the losing task's buffer, the loser couldn't observe it
until another graph event forced the lock to change hands. Each
passive consumer saw its deltas one graph event late; bursts
coalesced at turn boundaries instead of streaming live.

Switch to an `asyncio.Condition` + `_pumping` flag. Exactly one task
is the active pumper; others do `cond.wait()` and are notified after
every pump step. Passive consumers wake as soon as their buffer
fills, drop out of `_apump_next`, and let the iterator's buffer check
yield the data. Single-consumer behavior is unchanged; multi-
consumer throughput improves ~5x on bursty tools and no events are
lost.
 2026-04-20 13:58:25 -04:00
Nick Hollon 742488d5a0 fix(stream): replace pump lock with condition-based take-a-number 
The async pump serialized `graph_aiter.__anext__()` with an
`asyncio.Lock`, held across the full await. When two cursors read
different projections concurrently, the "losing" task slept inside
`_apump_next` on the lock itself — so when the active pumper pushed
its data onto the losing task's buffer, the loser couldn't observe it
until another graph event forced the lock to change hands. Each
passive consumer saw its deltas one graph event late; bursts
coalesced at turn boundaries instead of streaming live.

Switch to an `asyncio.Condition` + `_pumping` flag. Exactly one task
is the active pumper; others do `cond.wait()` and are notified after
every pump step. Passive consumers wake as soon as their buffer
fills, drop out of `_apump_next`, and let the iterator's buffer check
yield the data. Single-consumer behavior is unchanged; multi-
consumer throughput improves ~5x on bursty tools and no events are
lost.
 2026-04-20 13:58:15 -04:00
Nick Hollon b319426725 fix(stream): replace pump lock with condition-based take-a-number 
The async pump serialized `graph_aiter.__anext__()` with an
`asyncio.Lock`, held across the full await. When two cursors read
different projections concurrently, the "losing" task slept inside
`_apump_next` on the lock itself — so when the active pumper pushed
its data onto the losing task's buffer, the loser couldn't observe it
until another graph event forced the lock to change hands. Each
passive consumer saw its deltas one graph event late; bursts
coalesced at turn boundaries instead of streaming live.

Switch to an `asyncio.Condition` + `_pumping` flag. Exactly one task
is the active pumper; others do `cond.wait()` and are notified after
every pump step. Passive consumers wake as soon as their buffer
fills, drop out of `_apump_next`, and let the iterator's buffer check
yield the data. Single-consumer behavior is unchanged; multi-
consumer throughput improves ~5x on bursty tools and no events are
lost.
 2026-04-20 13:57:37 -04:00
Nick Hollon e01037d90c feat(core, prebuilt): tools-channel streaming and extensible GraphStreamer 
Adds a first-class `tools` stream mode with `tool-started` /
`tool-output-delta` / `tool-finished` / `tool-error` events, exposed as
`run.tool_calls` (an EventLog of ToolCallStream handles) through the new
`ToolCallTransformer`. Tool authors call
`langgraph.config.emit_tool_output_delta(chunk)` from inside a tool body
to stream partial output; outside a tool call it is a silent no-op.

`StreamTransformer` now declares `required_stream_modes`, and
`GraphStreamer` computes the request set purely as the union of those
declarations — no hardcoded base set. Built-in transformers
(Values/Messages/Subgraph) migrated to the new scheme; raw channels
like `custom` / `updates` / `checkpoints` / `tasks` / `debug` are
opt-in via a transformer that declares them.

Renames `StreamingHandler` → `GraphStreamer` (and file/test) and makes
it subclassable:

- `builtin_factories: ClassVar[tuple[TransformerFactory, ...]]` — extend
  to bundle default transformers (an `AgentStreamer` appends
  `ToolCallTransformer` here).
- `_make_run_stream` / `_make_async_run_stream` — override to return a
  `GraphRunStream` / `AsyncGraphRunStream` subclass with typed
  accessors over the extra projections.

Drops the now-redundant `values_transformer` arg from `GraphRunStream` /
`AsyncGraphRunStream` constructors — `output` / `interrupted` /
`interrupts` resolve the transformer lazily off the mux via a shared
`BaseRunStream._values_transformer` property.
 2026-04-20 12:13:08 -04:00
Nick Hollon bebcd20815 Address review feedback on subgraph lifecycle streaming 
- Robustify nested-Pregel detection with a parent_run_id fallback so
  subgraphs compiled with name equal to their node name are still
  recognized.
- Narrow bare excepts in SubgraphTransformer close/fail paths; log at
  warning with exc_info instead of silently swallowing.
- Assert mux registration in SubgraphTransformer._on_started instead
  of silently dropping events.
- Warn when RemoteGraph strips an unsupported "lifecycle" stream mode
  so callers aren't left wondering why no events arrive.
- Reject pre-built transformer instances in StreamingHandler; factories
  are required so transformers propagate into every subgraph scope.
- Comment the forward-before-close ordering in SubgraphTransformer.
- Trim duplicated pump/projection docstrings across run-stream classes.
- Add end-to-end tests for trigger_call_id, subgraph interrupt, and the
  name-collision detection fallback.
 2026-04-18 18:59:23 -04:00
Nick Hollon 2ad30132a3 Add subgraph lifecycle streaming with scoped per-subagent projections 
StreamingHandler now yields SubgraphRunStream handles for each nested
Pregel as it spawns. Each handle is a BaseRunStream wrapping a
mini-mux built from the same transformer factories as the root — so
sub.values, sub.messages, sub.subgraphs are populated by standard
ValuesTransformer / MessagesTransformer / SubgraphTransformer
instances at that subagent's scope. No routing or ChatModelStream
assembly duplicated across transformers.

Key pieces:

- StreamLifecycleHandler (pregel/_lifecycle.py): callback handler
  attached at pregel stream / astream sites when "lifecycle" is in
  stream_modes. Emits started / running / completed / failed /
  interrupted events per nested Pregel via metadata-based detection
  (langgraph_checkpoint_ns + name != langgraph_node, excluding
  __start__/__end__ sentinels). Carries trigger_call_id from the
  parent task id. Root subgraph terminal state is emitted eagerly at
  __init__ and by SubgraphTransformer.finalize / fail.

- StreamMux.make_child(scope) + factory-based construction. Mux takes
  a factory list; make_child produces a mini-mux at a new scope with
  fresh instances. bind_pump / bind_apump cascade through children so
  any subagent cursor drives the root pump.

- StreamTransformer.scope (base attribute) + scope_exact class flag.
  Mux skips process() for out-of-scope events when scope_exact=True
  (default), so user transformers get scope-filtered events with no
  boilerplate. SubgraphTransformer opts out to receive cross-scope
  events for forwarding.

- BaseRunStream shared base for GraphRunStream, AsyncGraphRunStream,
  and SubgraphRunStream. Provides extensions, native attrs, raw
  __iter__ / __aiter__, interleave. Root subclasses own the
  graph iterator and pump; SubgraphRunStream adds lifecycle metadata
  (path, status, error, checkpoint, trigger_call_id, graph_name).

- SubgraphTransformer (stream/transformers.py) is now a thin
  discovery + forwarding dispatcher. On lifecycle.started at its
  scope + 1, it creates a SubgraphRunStream via
  parent_mux.make_child(ns). It forwards each event matching a
  direct-child's path into that child's mini-mux. Terminal lifecycle
  closes the mini-mux.

- StreamMode literal extended with "lifecycle". pregel/remote.py
  filters it out of the SDK stream-mode list since wire-protocol
  support isn't landed yet.

Tests: 16 new in test_stream_subgraph_transformer.py (unit + sync/async
end-to-end including error + grandchild); existing Values/Messages
namespace filter tests migrated through mux.push to reflect the new
scope_exact contract.
 2026-04-18 18:15:31 -04:00
Nick Hollon ad0146a4de Wire async pump into MessagesTransformer streams 
AsyncChatModelStream projections deadlocked when iterated inside
the outer run.messages cursor: the inner stream awaited an
asyncio.Event that nothing was driving while the outer cursor was
suspended.

Plumb the langchain-core async pump hook down to each stream:
- MessagesTransformer gains _bind_apump (mirror of _bind_pump) and
  prefers async wiring in _make_stream.
- AsyncGraphRunStream._wire_arequest_more calls _bind_apump on any
  transformer that exposes it.

Test helpers: EventLog.push is a no-op before subscription; the
unit-test helpers and TestViaMux setups now pre-subscribe the log
(simulating what run.messages iteration does in production) and
verify pushed items via log._items. Flip the known-failure nested
iteration test to pass.
 2026-04-18 13:20:06 -04:00
Nick Hollon b6a196fac6 Merge streaming-transformer drain-on-consume redesign 
# Conflicts:
#	libs/langgraph/langgraph/stream/run_stream.py
#	libs/langgraph/langgraph/stream/streaming_handler.py
#	libs/langgraph/langgraph/stream/transformers.py
#	libs/langgraph/tests/test_streaming_handler.py
 2026-04-18 12:38:46 -04:00
Nick Hollon ab1d6980b5 Drain-on-consume streaming with caller-driven async pump 
Collapse the eager async pump task into the same caller-driven model
as sync: each cursor's advance drives one graph event through the
mux. Concurrent async consumers serialize through an asyncio.Lock so
each acquisition produces exactly one event, matching sync semantics.

EventLog becomes a single-consumer drainable queue — items pop off
as the cursor advances, a second __iter__ / __aiter__ raises.
Fan-out moves to explicit tee(n) / atee(n) helpers. Retention
windows, BufferOverflowError, and max_events are gone; pre-
subscription pushes are silent no-ops so unsubscribed projections
don't accumulate.

Both run streams gain abort() and context-manager support; the
pump's BaseException catch is narrowed to Exception so
CancelledError propagates per asyncio contract.

TestMemoryBounds locks in the drain-on-consume invariants:
subscribed buffers drop back to empty after each yield, unsubscribed
projections never accumulate, and run.output leaves the values log
untouched.
 2026-04-18 12:34:10 -04:00
Nick Hollon 7e5df56688 Produce ChatModelStream objects from MessagesTransformer 
Replace the passthrough (chunk, metadata) tuple projection with one
that yields a ChatModelStream per LLM call, routed by run_id. Handle
both v2 protocol-event payloads (message-start/chunk/message-finish)
and whole AIMessage payloads from on_chain_end (replayed via
message_to_events). Wire _bind_pump from GraphRunStream so nested
sync streams share the caller-driven pump.
 2026-04-18 10:56:45 -04:00
Nick Hollon 0f2f66fc8f refactor(langgraph): scope on_stream_event to StreamMessagesHandlerV2 
Moves `on_stream_event` off the v1 `StreamMessagesHandler` base and
onto the v2 subclass. Content-block events are a v2-only concept, so
forwarding them only when the v2 handler is attached keeps the
messages channel's shape predictable for v1 callers: plain
`graph.stream(stream_mode="messages")` now ignores `on_stream_event`
entirely, even if a node explicitly calls `model.stream_v2()` on a
v1-flagged run. Dedupe of the returned AIMessage still works in that
case via `_find_and_emit_messages` / `on_chain_end`.

Also makes the v2 handler's `on_llm_new_token` override an explicit
pass-through with a comment rather than `return None`, so it reads as
an intentional no-op instead of a missing return value.
 2026-04-17 16:22:50 -04:00
Nick Hollon acaa767542 feat(langgraph): route invoke messages through v2 via StreamingHandler 
When `StreamingHandler(graph).stream()` is used, content-block (v2)
protocol events now flow through `stream_mode="messages"` for every
`model.invoke()` call inside a node — with no node-level code changes.

Adds `StreamMessagesHandlerV2`, a `StreamMessagesHandler` subclass that
also inherits `_V2StreamingCallbackHandler` from langchain-core. The
marker base flips `BaseChatModel.invoke` to drive the protocol event
generator (firing `on_stream_event`) instead of `_stream` (firing
`on_llm_new_token`). The handler inherits `on_stream_event` from the
parent — events forward onto the messages channel unchanged — and
overrides `on_llm_new_token` to no-op so a node calling `model.stream()`
directly on a v2-flagged run can't leak AIMessageChunks onto the same
channel.

Opt-in is scoped to `StreamingHandler`: it merges a new internal
`CONFIG_KEY_STREAM_MESSAGES_V2=True` into `config.configurable` before
dispatching to `graph.stream` / `graph.astream`. Pregel reads the flag
at handler-construction time in both sync and async stream paths and
attaches the v2 subclass only when set. Direct
`graph.stream(stream_mode="messages")` callers keep the v1
`(AIMessageChunk, metadata)` shape — confirmed by a regression test.

Existing dedupe between the streamed v2 lifecycle and a node returning
the same assembled `AIMessage` transfers for free: the handler populates
`self.seen` from `message-start` events (via the inherited
`on_stream_event` body), and `on_chain_end`'s `_find_and_emit_messages`
already gates on `seen` — so an invoking node surfaces as exactly one
`ChatModelStream`, not two.

Test coverage in `tests/test_stream_messages_transformer.py`:

- `TestEndToEndV2Invoke` — node calling `model.invoke()` produces a
  single `ChatModelStream` with the full v2 event lifecycle, text
  projection accumulates correctly, multi-node graphs produce one
  stream per model call, constructed-message nodes still replay via
  `message_to_events`, async mirror via `ainvoke` + `astream`.
- `TestDirectMessagesModeStaysV1` — regression guard: direct
  `graph.stream(stream_mode="messages")` still yields AIMessageChunk
  tuples (not event dicts).
- `TestStreamMessagesHandlerV2Unit` — direct unit test that the v2
  handler's `on_llm_new_token` does not emit.
 2026-04-17 16:13:11 -04:00
Nick Hollon 5f24a0356a Tighten streaming run stream API and close review footguns 
- AsyncGraphRunStream.output/interrupted/interrupts are now methods
  (await run.output()), not properties returning coroutines. Forgetting
  `await` now fails at type-check time and at runtime on the common
  operations (bool/len/iter), instead of silently yielding a live
  coroutine that's truthy, lenless, and never awaited.
- interrupted/interrupts re-raise the run's error on both lanes so a
  failed run doesn't silently return the last-known interrupt state.
- Narrow the async pump catch from BaseException to Exception so
  CancelledError / KeyboardInterrupt propagate.
- Wrap run.extensions with types.MappingProxyType so users can't add
  or remove projection keys behind the mux's back.
- Add ValuesTransformer.error accessor; run stream stops reaching into
  _log._error.
- Tighten StreamingHandler graph type from Any to Pregel and widen
  convert_to_protocol_event to accept StreamPart.
- Projection-conflict ValueError now names the transformer that owns
  each colliding key, not just the incoming transformer.
- Replace deprecated asyncio.get_event_loop() in the async iteration
  test with asyncio.create_task.
- Document wall-clock semantics of ProtocolEvent.params.timestamp,
  the subgraph-namespace drop in MessagesTransformer, and the
  transformer-pipeline bypass for StreamChannel auto-forwarded events.
- Add tests for the new error-raising behavior on interrupted /
  interrupts and for the read-only extensions contract.
 2026-04-16 15:54:14 -04:00
Nick Hollon adda5f0341 Convert stream module docstrings to Google style 
Per repo convention (CLAUDE.md) and general project style: use single
backticks for inline code, Google-style Args/Returns/Raises sections,
and triple-backtick fenced code blocks instead of Sphinx double
backticks, :param: markers, or Usage:: blocks.

No behavior changes — docs only.
 2026-04-16 14:45:02 -04:00
Nick Hollon 28ce32edc7 Bound EventLog / StreamChannel memory with drop-oldest semantics 
- EventLog(maxlen=N) caps retention. When the buffer is full, push
  evicts the oldest item and advances an absolute _first_seq so
  cursors can detect they've fallen off the back. A lagging cursor
  raises BufferOverflowError on its next read — mirrors the
  restored=false signal from the reconnection scenario (§06).
- New cursors start at the current head of the buffer, not seq 0.
  For unbounded logs this is indistinguishable from the old behavior;
  for bounded logs, new consumers see whatever is still retained.
- StreamChannel(name, *, maxlen=N) forwards maxlen to its inner log.
- StreamMux(..., max_events=N) sets a default maxlen for every log /
  channel it binds (main event log plus each transformer projection).
  Explicit per-log maxlen wins over the mux default.
- StreamingHandler.stream() / astream() expose max_events: caller
  sets the run-wide memory budget; transformer authors can override
  per-log when they know better. Default unbounded, matching §15 Q3.
 2026-04-16 14:32:45 -04:00
Nick Hollon 119847f80f Add async lane to StreamTransformer; roll registration into StreamMux 
- StreamTransformer: aprocess/afinalize/afail + schedule() helper with
  on_error="log"|"raise". requires_async flag (plus override detection)
  makes sync stream() raise at registration rather than at first event.
- StreamMux: apush/aclose/afail for the async dispatch path. aclose
  awaits all scheduled tasks across transformers before afinalize;
  afail cancels and awaits them before afail hooks.
- StreamMux now takes transformers in __init__ and owns extensions /
  native_keys aggregation and conflict detection — register() is gone.
- GraphRunStream / AsyncGraphRunStream read extensions and native keys
  off the mux directly; StreamingHandler._setup() inlined.
 2026-04-16 14:20:03 -04:00
Nick Hollon f43743c3e7 Use asyncio.Event for async notification instead of per-cursor futures 
Replace the _async_waiters list and manual future management with a
single shared asyncio.Event. Simpler notification (just event.set()),
no per-cursor future allocation, no get_running_loop/create_future
in our code.
 2026-04-16 11:31:35 -04:00
Nick Hollon dbded7a59e Drop threading from EventLog — single-threaded by design 
Remove threading.Lock and call_soon_threadsafe. Both sync and async
paths are single-threaded (caller-driven sync, event-loop-bound
async), so there is no concurrent access to the buffer. Direct
fut.set_result() replaces call_soon_threadsafe for async notification
since the producer always runs on the event loop thread.
 2026-04-16 11:21:26 -04:00
Nick Hollon 986c1cc2e3 Auto-close EventLogs, reject projection key conflicts, fix async interrupted/interrupts 
Three usability fixes:

- Mux now auto-closes/fails EventLogs in projections (like StreamChannels),
  so transformers no longer need finalize/fail boilerplate
- StreamingHandler._setup() raises ValueError if a user transformer
  returns projection keys that collide with already-registered keys
- AsyncGraphRunStream.interrupted and .interrupts now await the pump
  task before returning, matching the output property's behavior
 2026-04-16 10:24:52 -04:00
Nick Hollon 28cf5ed78d Unify EventLog — remove sync/async split from transformer API 
Merge EventLog and AsyncEventLog into a single class with a _bind()
mechanism. EventLog starts unbound; the StreamMux calls _bind(is_async)
after transformer registration so only the correct iteration protocol
is available. This removes the is_async parameter from EventLog,
StreamChannel, and all transformer constructors — transformers just
create EventLog() and never need to know whether they run in sync or
async context.
 2026-04-16 09:32:47 -04:00
Nick Hollon ca5d9a6bd7 Fix mypy errors, tighten init() return type, move import to top level 2026-04-15 19:21:08 -04:00
Nick Hollon ae3c823499 Make sync streaming caller-driven, no background thread 
Replace the daemon thread pump with a pull-based model where the
caller's iteration on any projection drives the graph forward. EventLog
uses a _request_more callback instead of threading.Condition. Matches
v1's model where the caller's for loop is the pump. Async path is
unchanged (background task on the event loop).
 2026-04-15 19:14:18 -04:00
Nick Hollon 5b1f86facc Split EventLog into sync and async classes 
Separate EventLog (sync, __iter__) and AsyncEventLog (async, __aiter__)
with a shared _EventLogBase for the producer API. Thread is_async through
StreamMux, StreamChannel, and transformers so the right log type is
created based on whether stream() or astream() is called. Prevents
accidentally mixing sync and async iteration on the same log.
 2026-04-15 18:59:47 -04:00
Nick Hollon 8f03bf9f15 Add timestamp and eventId to ProtocolEvent 
Add timestamp (ms epoch) to event params and eventId to the event
envelope, aligning the in-process event shape with the protocol spec.
Update tests to include timestamps and verify their presence.
 2026-04-15 18:26:09 -04:00
Nick Hollon 0076da9008 feat(langgraph): add streaming transformer infrastructure and tests 
Introduces the StreamingHandler, StreamMux, EventLog, StreamChannel,
and StreamTransformer abstractions for ergonomic streaming projections
over compiled graphs. Includes ValuesTransformer and MessagesTransformer
as built-in native projections, plus support for user-defined custom
transformers.
 2026-04-15 18:12:13 -04:00
John KennedyGitHubClaude Opus 4.6
 		7fa49bd550 docs: document LANGGRAPH_STRICT_MSGPACK for checkpoint security (#7517) 
## Summary

- Add `LANGGRAPH_STRICT_MSGPACK=true` guidance to `JsonPlusSerializer`
docstring and inline comments
- Update the warning message emitted for unregistered types to mention
the env var
- Add module docstring to `_msgpack.py` explaining the safety controls
- Add Security sections to checkpoint, checkpoint-postgres, and
checkpoint-sqlite READMEs

## Context

Multiple security advisories have reported the same msgpack
deserialization pattern (`ext_hook` → `importlib.import_module` →
`getattr` → call). The underlying behavior is documented in the repo's
threat model as T1, but the `LANGGRAPH_STRICT_MSGPACK` env var that
mitigates it is not surfaced in user-facing docs, docstrings, or warning
messages. This PR closes that gap.

## Test plan

- [x] Verify READMEs render correctly on GitHub (callout boxes use `>
[!IMPORTANT]` syntax)
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 		6719d34023 chore(deps): bump pytest from 9.0.2 to 9.0.3 in /libs/checkpoint-sqlite (#7502) 
Bumps [pytest](https://github.com/pytest-dev/pytest) from 9.0.2 to
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<p><a
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Fixed <code>pytest.approx</code> which now correctly takes into account
<code>~collections.abc.Mapping</code> keys order to compare them.</p>
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<p><a
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Blocking a <code>conftest.py</code> file using the <code>-p no:</code>
option is now explicitly disallowed.</p>
<p>Previously this resulted in an internal assertion failure during
plugin loading.</p>
<p>Pytest now raises a clear <code>UsageError</code> explaining that
conftest files are not plugins and cannot be disabled via
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<li>
<p><a
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Fixed crash when a test raises an exceptiongroup with
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</li>
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<p><a
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Fixed an issue where non-string messages passed to <!-- raw HTML omitted
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printed.</p>
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<p><a
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Revert &quot;Fix: assertrepr_compare respects dict insertion order (<a
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doc: Update training info (<a
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Merge pull request <a
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from pytest-dev/patchback/backports/9.0.x/d6fa26c62...</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/7ee58acc8777c31ac6cf388d01addf5a414a7439"><code>7ee58ac</code></a>
Merge pull request <a
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from Pierre-Sassoulas/fix-implicit-str-concat-and-d...</li>
<li><a
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Merge pull request <a
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 		96843788d0 chore(deps): bump langchain-core from 1.2.27 to 1.2.28 in /libs/cli (#7450) 
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 		ba5e3c4a9b chore(deps): bump pytest from 9.0.2 to 9.0.3 in /libs/checkpoint (#7506) 
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<p><a
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<p><a
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<p><a
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Revert &quot;Fix: assertrepr_compare respects dict insertion order (<a
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<p><a
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Blocking a <code>conftest.py</code> file using the <code>-p no:</code>
option is now explicitly disallowed.</p>
<p>Previously this resulted in an internal assertion failure during
plugin loading.</p>
<p>Pytest now raises a clear <code>UsageError</code> explaining that
conftest files are not plugins and cannot be disabled via
<code>-p</code>.</p>
</li>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13734">#13734</a>:
Fixed crash when a test raises an exceptiongroup with
<code>__tracebackhide__ = True</code>.</p>
</li>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14195">#14195</a>:
Fixed an issue where non-string messages passed to <!-- raw HTML omitted
-->unittest.TestCase.subTest()<!-- raw HTML omitted --> were not
printed.</p>
</li>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14343">#14343</a>:
Fixed use of insecure temporary directory (CVE-2025-71176).</p>
</li>
</ul>
<h2>Improved documentation</h2>
<ul>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13388">#13388</a>:
Clarified documentation for <code>-p</code> vs
<code>PYTEST_PLUGINS</code> plugin loading and fixed an incorrect
<code>-p</code> example.</li>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13731">#13731</a>:
Clarified that capture fixtures (e.g. <code>capsys</code> and
<code>capfd</code>) take precedence over the <code>-s</code> /
<code>--capture=no</code> command-line options in <code>Accessing
captured output from a test function
&lt;accessing-captured-output&gt;</code>.</li>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14088">#14088</a>:
Clarified that the default <code>pytest_collection</code> hook sets
<code>session.items</code> before it calls
<code>pytest_collection_finish</code>, not after.</li>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14255">#14255</a>:
TOML integer log levels must be quoted: Updating reference
documentation.</li>
</ul>
<h2>Contributor-facing changes</h2>
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<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/12689">#12689</a>:
The test reports are now published to Codecov from GitHub Actions.
The test statistics is visible <a
href="https://app.codecov.io/gh/pytest-dev/pytest/tests">on the web
interface</a>.</p>
<p>-- by <code>aleguy02</code></p>
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<li><a
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Prepare release version 9.0.3</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/089d98199c253d8f89a040243bc4f2aa6cd5ab22"><code>089d981</code></a>
Merge pull request <a
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from bluetech/revert-14193-backport</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/8127eaf4ab7f6b2fdd0dc1b38343ec97aeef05ac"><code>8127eaf</code></a>
Revert &quot;Fix: assertrepr_compare respects dict insertion order (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14050">#14050</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14193">#14193</a>)&quot;</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/99a7e6029e7a6e8d53e5df114b1346e035370241"><code>99a7e60</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14363">#14363</a>
from pytest-dev/patchback/backports/9.0.x/95d8423bd...</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/ddee02a578da30dd43aedc39c1c1f1aaadfcee95"><code>ddee02a</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14343">#14343</a>
from bluetech/cve-2025-71176-simple</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/74eac6916fee34726cb194f16c516e96fbd29619"><code>74eac69</code></a>
doc: Update training info (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14298">#14298</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14301">#14301</a>)</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/f92dee777cfdb77d1c43633d02766ddf1f07c869"><code>f92dee7</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14267">#14267</a>
from pytest-dev/patchback/backports/9.0.x/d6fa26c62...</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/7ee58acc8777c31ac6cf388d01addf5a414a7439"><code>7ee58ac</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/12378">#12378</a>
from Pierre-Sassoulas/fix-implicit-str-concat-and-d...</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/37da870d37e3a2f5177cae075c7b9ae279432bf8"><code>37da870</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14259">#14259</a>
from mitre88/patch-4 (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14268">#14268</a>)</li>
<li><a
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Add explanation for string context diffs (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14257">#14257</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14266">#14266</a>)</li>
<li>Additional commits viewable in <a
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 		c27d103e04 chore(deps): bump pytest from 9.0.2 to 9.0.3 in /libs/checkpoint-conformance (#7508) 
Bumps [pytest](https://github.com/pytest-dev/pytest) from 9.0.2 to
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<blockquote>
<h2>9.0.3</h2>
<h1>pytest 9.0.3 (2026-04-07)</h1>
<h2>Bug fixes</h2>
<ul>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/12444">#12444</a>:
Fixed <code>pytest.approx</code> which now correctly takes into account
<code>~collections.abc.Mapping</code> keys order to compare them.</p>
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<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13634">#13634</a>:
Blocking a <code>conftest.py</code> file using the <code>-p no:</code>
option is now explicitly disallowed.</p>
<p>Previously this resulted in an internal assertion failure during
plugin loading.</p>
<p>Pytest now raises a clear <code>UsageError</code> explaining that
conftest files are not plugins and cannot be disabled via
<code>-p</code>.</p>
</li>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13734">#13734</a>:
Fixed crash when a test raises an exceptiongroup with
<code>__tracebackhide__ = True</code>.</p>
</li>
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<p><a
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Fixed an issue where non-string messages passed to <!-- raw HTML omitted
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printed.</p>
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<p><a
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Fixed use of insecure temporary directory (CVE-2025-71176).</p>
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<h2>Improved documentation</h2>
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<li><a
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Clarified documentation for <code>-p</code> vs
<code>PYTEST_PLUGINS</code> plugin loading and fixed an incorrect
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Clarified that capture fixtures (e.g. <code>capsys</code> and
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<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14088">#14088</a>:
Clarified that the default <code>pytest_collection</code> hook sets
<code>session.items</code> before it calls
<code>pytest_collection_finish</code>, not after.</li>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14255">#14255</a>:
TOML integer log levels must be quoted: Updating reference
documentation.</li>
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href="https://app.codecov.io/gh/pytest-dev/pytest/tests">on the web
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<li><a
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Prepare release version 9.0.3</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/089d98199c253d8f89a040243bc4f2aa6cd5ab22"><code>089d981</code></a>
Merge pull request <a
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from bluetech/revert-14193-backport</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/8127eaf4ab7f6b2fdd0dc1b38343ec97aeef05ac"><code>8127eaf</code></a>
Revert &quot;Fix: assertrepr_compare respects dict insertion order (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14050">#14050</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14193">#14193</a>)&quot;</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/99a7e6029e7a6e8d53e5df114b1346e035370241"><code>99a7e60</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14363">#14363</a>
from pytest-dev/patchback/backports/9.0.x/95d8423bd...</li>
<li><a
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Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14343">#14343</a>
from bluetech/cve-2025-71176-simple</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/74eac6916fee34726cb194f16c516e96fbd29619"><code>74eac69</code></a>
doc: Update training info (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14298">#14298</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14301">#14301</a>)</li>
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Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14267">#14267</a>
from pytest-dev/patchback/backports/9.0.x/d6fa26c62...</li>
<li><a
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Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/12378">#12378</a>
from Pierre-Sassoulas/fix-implicit-str-concat-and-d...</li>
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Merge pull request <a
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Add explanation for string context diffs (<a
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(<a
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 		d189f6551e chore(deps): bump pytest from 9.0.2 to 9.0.3 in /libs/langgraph (#7507) 
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<p><a
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Blocking a <code>conftest.py</code> file using the <code>-p no:</code>
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<p>Previously this resulted in an internal assertion failure during
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<p><a
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<p><a
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Fixed an issue where non-string messages passed to <!-- raw HTML omitted
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printed.</p>
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<p><a
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Fixed use of insecure temporary directory (CVE-2025-71176).</p>
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<h2>Improved documentation</h2>
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<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13388">#13388</a>:
Clarified documentation for <code>-p</code> vs
<code>PYTEST_PLUGINS</code> plugin loading and fixed an incorrect
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<li><a
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Clarified that capture fixtures (e.g. <code>capsys</code> and
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<code>--capture=no</code> command-line options in <code>Accessing
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<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14088">#14088</a>:
Clarified that the default <code>pytest_collection</code> hook sets
<code>session.items</code> before it calls
<code>pytest_collection_finish</code>, not after.</li>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14255">#14255</a>:
TOML integer log levels must be quoted: Updating reference
documentation.</li>
</ul>
<h2>Contributor-facing changes</h2>
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<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/12689">#12689</a>:
The test reports are now published to Codecov from GitHub Actions.
The test statistics is visible <a
href="https://app.codecov.io/gh/pytest-dev/pytest/tests">on the web
interface</a>.</p>
<p>-- by <code>aleguy02</code></p>
</li>
</ul>
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</details>
<details>
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<li><a
href="https://github.com/pytest-dev/pytest/commit/a7d58d7a21b78581e636bbbdea13c66ad1657c1e"><code>a7d58d7</code></a>
Prepare release version 9.0.3</li>
<li><a
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Merge pull request <a
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from bluetech/revert-14193-backport</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/8127eaf4ab7f6b2fdd0dc1b38343ec97aeef05ac"><code>8127eaf</code></a>
Revert &quot;Fix: assertrepr_compare respects dict insertion order (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14050">#14050</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14193">#14193</a>)&quot;</li>
<li><a
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Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14363">#14363</a>
from pytest-dev/patchback/backports/9.0.x/95d8423bd...</li>
<li><a
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Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14343">#14343</a>
from bluetech/cve-2025-71176-simple</li>
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Merge pull request <a
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Add explanation for string context diffs (<a
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 		1dd9adf833 chore(deps): bump pytest from 9.0.2 to 9.0.3 in /libs/checkpoint-postgres (#7503) 
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<h1>pytest 9.0.3 (2026-04-07)</h1>
<h2>Bug fixes</h2>
<ul>
<li>
<p><a
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<li><a
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TOML integer log levels must be quoted: Updating reference
documentation.</li>
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Prepare release version 9.0.3</li>
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Revert &quot;Fix: assertrepr_compare respects dict insertion order (<a
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Merge pull request <a
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doc: Update training info (<a
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<li><a
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Merge pull request <a
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Merge pull request <a
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Add explanation for string context diffs (<a
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(<a
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 		92c66ca997 chore(deps): bump langchain-core from 1.2.22 to 1.2.28 in /libs/checkpoint-sqlite (#7451) 
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<p>release(core): 1.2.24 (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/36434">#36434</a>)
feat(core): impute placeholder filenames for OpenAI file inputs (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/36433">#36433</a>)
chore: pygments&gt;=2.20.0 across all packages (CVE-2026-4539) (<a
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fix(core): add &quot;computer&quot; to _WellKnownOpenAITools (<a
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fix(core): handle symlinks in deprecated prompt save path (<a
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 		a7356edf8a chore(deps): bump langsmith from 0.5.4 to 0.5.18 in /libs/cli/js-examples (#7474) 
Bumps [langsmith](https://github.com/langchain-ai/langsmith-sdk) from
0.5.4 to 0.5.18.
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 		354dceaac7 chore(deps-dev): bump pytest from 9.0.2 to 9.0.3 in /libs/sdk-py (#7504) 
Bumps [pytest](https://github.com/pytest-dev/pytest) from 9.0.2 to
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<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/pytest-dev/pytest/releases">pytest's
releases</a>.</em></p>
<blockquote>
<h2>9.0.3</h2>
<h1>pytest 9.0.3 (2026-04-07)</h1>
<h2>Bug fixes</h2>
<ul>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/12444">#12444</a>:
Fixed <code>pytest.approx</code> which now correctly takes into account
<code>~collections.abc.Mapping</code> keys order to compare them.</p>
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<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13634">#13634</a>:
Blocking a <code>conftest.py</code> file using the <code>-p no:</code>
option is now explicitly disallowed.</p>
<p>Previously this resulted in an internal assertion failure during
plugin loading.</p>
<p>Pytest now raises a clear <code>UsageError</code> explaining that
conftest files are not plugins and cannot be disabled via
<code>-p</code>.</p>
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<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13734">#13734</a>:
Fixed crash when a test raises an exceptiongroup with
<code>__tracebackhide__ = True</code>.</p>
</li>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14195">#14195</a>:
Fixed an issue where non-string messages passed to <!-- raw HTML omitted
-->unittest.TestCase.subTest()<!-- raw HTML omitted --> were not
printed.</p>
</li>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14343">#14343</a>:
Fixed use of insecure temporary directory (CVE-2025-71176).</p>
</li>
</ul>
<h2>Improved documentation</h2>
<ul>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13388">#13388</a>:
Clarified documentation for <code>-p</code> vs
<code>PYTEST_PLUGINS</code> plugin loading and fixed an incorrect
<code>-p</code> example.</li>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/13731">#13731</a>:
Clarified that capture fixtures (e.g. <code>capsys</code> and
<code>capfd</code>) take precedence over the <code>-s</code> /
<code>--capture=no</code> command-line options in <code>Accessing
captured output from a test function
&lt;accessing-captured-output&gt;</code>.</li>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14088">#14088</a>:
Clarified that the default <code>pytest_collection</code> hook sets
<code>session.items</code> before it calls
<code>pytest_collection_finish</code>, not after.</li>
<li><a
href="https://redirect.github.com/pytest-dev/pytest/issues/14255">#14255</a>:
TOML integer log levels must be quoted: Updating reference
documentation.</li>
</ul>
<h2>Contributor-facing changes</h2>
<ul>
<li>
<p><a
href="https://redirect.github.com/pytest-dev/pytest/issues/12689">#12689</a>:
The test reports are now published to Codecov from GitHub Actions.
The test statistics is visible <a
href="https://app.codecov.io/gh/pytest-dev/pytest/tests">on the web
interface</a>.</p>
<p>-- by <code>aleguy02</code></p>
</li>
</ul>
</blockquote>
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<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pytest-dev/pytest/commit/a7d58d7a21b78581e636bbbdea13c66ad1657c1e"><code>a7d58d7</code></a>
Prepare release version 9.0.3</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/089d98199c253d8f89a040243bc4f2aa6cd5ab22"><code>089d981</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14366">#14366</a>
from bluetech/revert-14193-backport</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/8127eaf4ab7f6b2fdd0dc1b38343ec97aeef05ac"><code>8127eaf</code></a>
Revert &quot;Fix: assertrepr_compare respects dict insertion order (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14050">#14050</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14193">#14193</a>)&quot;</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/99a7e6029e7a6e8d53e5df114b1346e035370241"><code>99a7e60</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14363">#14363</a>
from pytest-dev/patchback/backports/9.0.x/95d8423bd...</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/ddee02a578da30dd43aedc39c1c1f1aaadfcee95"><code>ddee02a</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14343">#14343</a>
from bluetech/cve-2025-71176-simple</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/74eac6916fee34726cb194f16c516e96fbd29619"><code>74eac69</code></a>
doc: Update training info (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14298">#14298</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14301">#14301</a>)</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/f92dee777cfdb77d1c43633d02766ddf1f07c869"><code>f92dee7</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14267">#14267</a>
from pytest-dev/patchback/backports/9.0.x/d6fa26c62...</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/7ee58acc8777c31ac6cf388d01addf5a414a7439"><code>7ee58ac</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/12378">#12378</a>
from Pierre-Sassoulas/fix-implicit-str-concat-and-d...</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/37da870d37e3a2f5177cae075c7b9ae279432bf8"><code>37da870</code></a>
Merge pull request <a
href="https://redirect.github.com/pytest-dev/pytest/issues/14259">#14259</a>
from mitre88/patch-4 (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14268">#14268</a>)</li>
<li><a
href="https://github.com/pytest-dev/pytest/commit/c34bfa3b7acb65b594707c714f1d8461b0304eed"><code>c34bfa3</code></a>
Add explanation for string context diffs (<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14257">#14257</a>)
(<a
href="https://redirect.github.com/pytest-dev/pytest/issues/14266">#14266</a>)</li>
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Eugene YurtsevandGitHub 2ff294af77 release(langgraph): 1.1.7a2 (#7511) 
Release 1.1.7a2
 2026-04-14 16:55:35 +00:00
William FHGitHubEugene Yurtsev
 		4c67f84016 chore: allow passing some metadata only for tracing purposes (#7383) 
Allows us to put some more information for tracing purposes (e.g.,
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performance)
Move some other metadata into tracing only since it's not needed in
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 2026-04-14 09:58:24 -04:00
open-swe[bot]GitHubopen-swe[bot] <open-swe@users.noreply.github.com>Sydney Runkle
 		2c98c59fca fix: populate assistant_id from config configurable instead of metadata (#7468) 
## Description
The `_build_server_info` function was reading `assistant_id` and
`graph_id` from `config["metadata"]`, but the server puts these values
in `config["configurable"]`. This updates the source to read from
`configurable` consistently.

## Test Plan
- [ ] Verify `server_info.assistant_id` and `server_info.graph_id` are
correctly populated from `config["configurable"]`

_Opened collaboratively by Sydney Runkle and open-swe._

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 2026-04-13 09:08:09 -04:00