LangGraph

Thread streams now route LangSmith traces, improving trace visibility for streaming workflows.

Added a decrypt replacement result to the SDK, and cron end_time can now be cleared by passing end_time=None. Also merged lc_versions config metadata in LangGraph.

add_node now exposes a trace_policy option. Several checkpoint packages (postgres, sqlite) were also released, including a fix for collecting writes at plain-value seed in delta channel history.

Added type annotations for v3 stream_events return values and native projections. Exposed trace_policy parameter on add_node, and reverted deletion of TracePolicy while dropping tags from it. CLI now allows langgraph-api versions up to 1.0.0.

Fixed a delta channel bug where updateState on a fresh thread would force a snapshot instead of a stub checkpoint.

Fixes an Overwrite node's serialization during JSON roundtrips and ensures exit-mode task IDs are valid UUIDs instead of raw strings. Also patches a superstep consistency issue where DeltaChannel writes could be overwritten incorrectly.

Fixed a regression from 1.2.3 where nested subgraphs failed to inherit the parent checkpoint_ns, and a v3 stream abort that was not canceling running subgraphs.

The CLI now supports compatible API version ranges for more flexible versioning.

Fixed an updateState bug related to deltaChannel on an empty thread. This release also includes dependency updates and internal migrations.

The LangGraph CLI now supports passing certfile and cert key when running the dev server under HTTPS. This release includes changes since cli==0.4.28.

Changes since cli==0.4.27

Fixed _on_started to remain backward-compatible with overrides predating the cause parameter.