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LangGraph

AI-ASSISTANTS
Velocity5.2

Framework from LangChain for building stateful, multi-actor agent applications with LLMs.

www.langchain.com/langgraph ↗

LangGraph 1.2 ships durable resume across host crashes, hardening it for long-running agents.

durable executioncheckpointingagent runtimestream transformerspostgresstudio deploy
◆Current state
LangGraph has just rolled the whole family to 1.2 stable: core, prebuilt, checkpoint, and the Postgres/SQLite checkpoint backends. The marquee 1.2.0 change is durable error-handler resume across host crashes, plus set_node_defaults() on StateGraph and a v3 stream-transformer infrastructure with a new before_builtins opt-in. Delta channel checkpointing — the more compact, history-aware state model — is now shipping across all checkpoint backends as a beta surface.
◆Where it's heading
The platform is pivoting from 'graph runtime for LLM apps' toward 'durable, recoverable agent runtime,' with crash-tolerant execution and a unified checkpoint storage model as the foundation. The cross-package alpha→stable cadence and the conformance work indicate the team is treating delta channels as the next default rather than an experiment. Studio deploy support in the CLI hints at a managed deployment path being prepared alongside the open-source core.
◆Prediction
Expect delta channel APIs to exit beta within one or two releases as the conformance suite stabilizes, and v3 stream transformers to graduate beyond the before_builtins opt-in. A more visible push on hosted Studio deploys is the most likely commercial follow-up.

◆Recent moves

  1. 23h ago

    langgraph==1.2.1

    A patch on the 1.2 line adds a before_builtins opt-in for stream transformers and fixes tool results leaking into v3 messages. Small surface, but it continues the v3 streaming buildout the team has been layering in alongside the 1.2 release.

    View source ↗
  2. 10d ago

    LangGraph 1.2.0: durable resume across host crashes

    ⚡ SPARK

    The 1.2.0 stable cut is the directional release in this batch: durable error-handler resume across host crashes lands, set_node_defaults() simplifies StateGraph construction, and the checkpoint layer gains a forced delta-channel snapshot policy. This is the release the rest of the family is rallying around.

    View source ↗
  3. 10d ago

    langgraph-checkpoint-postgres==3.1.0

    The Postgres checkpoint backend graduates to 3.1.0 stable in lockstep with the 1.2 family, with a real fix to the seed-blob branch of the delta stage-2 UNION ALL query. Quietly important because Postgres is the path most production deployments take when they outgrow in-memory state.

    View source ↗
  4. 10d ago

    langgraph-prebuilt==1.1.0

    Prebuilt 1.1.0 stable mostly reflects the family-wide alpha-to-stable bump and dependency syncs against the new langchain-core. Nothing user-visible lands here that wasn't already exposed during the alpha cycle.

    View source ↗
  5. 10d ago

    langgraph-checkpoint-sqlite==3.1.0

    SQLite gets its 3.1.0 cut with the delta-channel streaming walk override that the Postgres and in-memory backends already carry. This brings the three checkpoint backends to feature parity for the new delta history APIs, even though those APIs are still marked beta.

    View source ↗
  6. 10d ago

    langgraph-checkpoint==4.1.0

    The base checkpoint package hits 4.1.0 with the forced delta-channel snapshot policy after a configurable max-superstep gap, and a security-tightening fix that pins allowed_objects in the Reviver. Both feed directly into the 1.2.0 durability story by bounding how far state can drift before a snapshot lands.

    View source ↗