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LangGraph

AI-ASSISTANTS
Velocity3.8

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

www.langchain.com/langgraph ↗

LangGraph 1.2 cuts out of alpha with durable crash-resume and the delta-channel checkpointer in beta.

durable-resumedelta-channelcheckpointingstudio-deploypackage-coordinationproduction-readiness
◆Current state
LangGraph has graduated its 1.2 line to official releases across the whole package family (graph, prebuilt, checkpoint, postgres, sqlite, SDK, CLI) on the same day. The two substantive engineering pushes are durable error-handler resume across host crashes and the delta channel checkpointer — a more efficient state-persistence layer now marked beta. The CLI also gained studio deploy support.
◆Where it's heading
Development is squarely in late-1.x mode: fewer new abstractions, more reliability and lifecycle work. Delta-channel cadence reworks, public writes-history API, and crash-safe resumption are all production-durability investments rather than capability expansions. Pairing that with studio-deploy in the CLI suggests LangSmith Studio is being positioned as the canonical deploy surface for graphs.
◆Prediction
Delta-channel APIs come out of beta in the next minor (likely 1.3) — possibly with default-on cadence. Studio deploy from the CLI expands to cover environments or rollback in the same release window.

◆Recent moves

  1. 9d ago

    LangGraph 1.2: durable crash-resume and StateGraph node defaults

    Core langgraph cuts 1.2.0, adding durable error-handler resume across host crashes and set_node_defaults() on StateGraph. The crash-resume feature is the one that actually changes operator behavior — graphs can now survive a host reboot mid-run.

    View source ↗
  2. 9d ago

    Postgres checkpointer 3.1: delta-channel column-alias fix

    Postgres checkpointer 3.1 cuts out of alpha with a delta-channel SQL correctness fix (column aliases on the seed-blob branch) plus routine dep bumps. Coordinated package release rather than a standalone change.

    View source ↗
  3. 9d ago

    Prebuilt 1.1: coordinated release with langgraph 1.2

    Prebuilt 1.1 is the coordinated release that ships alongside langgraph 1.2. No standalone new feature in this package — version bumps and dependency upgrades.

    View source ↗
  4. 9d ago

    SQLite checkpointer 3.1: streaming delta-history walk

    SQLite checkpointer 3.1 cuts out of alpha — main change is a streaming walk for get_delta_channel_history, a memory-bound improvement on the new delta API.

    View source ↗
  5. 9d ago

    Checkpoint 4.1: delta-channel snapshot cadence and Reviver hardening

    Checkpoint 4.1 reworks delta-channel cadence (forced snapshot after max supersteps) and tightens Reviver with an allowed_objects list. The deserialization hardening is a real safety change for anyone using the checkpoint format across processes.

    View source ↗
  6. 9d ago

    CLI 0.4.26: prerelease api_version support

    CLI 0.4.26 adds support for prerelease api_versions. Small follow-up release on top of the studio-deploy feature in 0.4.25.

    View source ↗