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docs: introduce LangGraph Server changelog (#5417)
* introduce changelog * fix spelling * Update docs/mkdocs.yml Co-authored-by: Lauren Hirata Singh <lauren@langchain.dev> * Update docs/docs/cloud/reference/langgraph_server_changelog.md Co-authored-by: Lauren Hirata Singh <lauren@langchain.dev> * Update docs/docs/cloud/reference/langgraph_server_changelog.md Co-authored-by: Lauren Hirata Singh <lauren@langchain.dev> * Update langgraph_server_changelog.md --------- Co-authored-by: Lauren Hirata Singh <lauren@langchain.dev>
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Sam Crowder
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Lauren Hirata Singh
Lauren Hirata Singh
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# LangGraph Server Changelog
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[LangGraph Server](../../concepts/langgraph_server.md) is an API platform for creating and managing agent-based applications. It provides built-in persistence, a task queue, and supports deploying, configuring, and running assistants (agentic workflows) at scale. This changelog documents all notable updates, features, and fixes to LangGraph Server releases.
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---
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## v0.2.66 (2025-06-26)
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- Fixed a 404 error when creating multiple runs with the same thread_id using `on_not_exist="create"`.
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## v0.2.65 (2025-06-25)
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- Ensured that only fields from `assistant_versions` are returned when necessary.
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- Ensured consistent data types for in-memory and PostgreSQL users, improving internal authentication handling.
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## v0.2.64 (2025-06-24)
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- Added descriptions to version entries for better clarity.
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## v0.2.62 (2025-06-23)
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- Improved user handling for custom authentication in the JS Studio.
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- Added Prometheus-format run statistics to the metrics endpoint for better monitoring.
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- Added run statistics in Prometheus format to the metrics endpoint.
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## v0.2.61 (2025-06-20)
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- Set a maximum idle time for Redis connections to prevent unnecessary open connections.
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## v0.2.60 (2025-06-20)
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- Enhanced error logging to include traceback details for dictionary operations.
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- Added a `/metrics` endpoint to expose queue worker metrics for monitoring.
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## v0.2.57 (2025-06-18)
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- Removed CancelledError from retriable exceptions to allow local interrupts while maintaining retriability for workers.
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- Introduced middleware to gracefully shut down the server after completing in-flight requests upon receiving a SIGINT.
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- Reduced metadata stored in checkpoint to only include necessary information.
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- Improved error handling in join runs to return error details when present.
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## v0.2.56 (2025-06-17)
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- Improved application stability by adding a handler for SIGTERM signals.
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## v0.2.55 (2025-06-17)
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- Improved the handling of cancellations in the queue entrypoint.
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- Improved cancellation handling in the queue entry point.
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## v0.2.54 (2025-06-16)
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- Enhanced error message for LuaLock timeout during license validation.
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- Fixed the $contains filter in custom auth by requiring an explicit ::text cast and updated tests accordingly.
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- Ensured project and tenant IDs are formatted as UUIDs for consistency.
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## v0.2.53 (2025-06-13)
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- Resolved a timing issue to ensure the queue starts only after the graph is registered.
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- Improved performance by setting thread and run status in a single query and enhanced error handling during checkpoint writes.
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- Reduced the default background grace period to 3 minutes.
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## v0.2.52 (2025-06-12)
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- Now logging expected graphs when one is omitted to improve traceability.
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- Implemented a time-to-live (TTL) feature for resumable streams.
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- Improved query efficiency and consistency by adding a unique index and optimizing row locking.
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## v0.2.51 (2025-06-12)
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- Handled `CancelledError` by marking tasks as ready to retry, improving error management in worker processes.
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- Added LG API version and request ID to metadata and logs for better tracking.
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- Added LG API version and request ID to metadata and logs to improve traceability.
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- Improved database performance by creating indexes concurrently.
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- Ensured postgres write is committed only after the Redis running marker is set to prevent race conditions.
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- Enhanced query efficiency and reliability by adding a unique index on thread_id/running, optimizing row locks, and ensuring deterministic run selection.
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- Resolved a race condition by ensuring Postgres updates only occur after the Redis running marker is set.
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## v0.2.46 (2025-06-07)
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- Introduced a new connection for each operation while preserving transaction characteristics in Threads state `update()` and `bulk()` commands.
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## v0.2.45 (2025-06-05)
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- Enhanced streaming feature by incorporating tracing contexts.
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- Removed an unnecessary query from the Crons.search function.
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- Resolved connection reuse issue when scheduling next run for multiple cron jobs.
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- Removed an unnecessary query in the Crons.search function to improve efficiency.
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- Resolved an issue with scheduling the next cron run by improving connection reuse.
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## v0.2.44 (2025-06-04)
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- Enhanced the worker logic to exit the pipeline before continuing when the Redis message limit is reached.
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- Introduced a ceiling for Redis message size with an option to skip messages larger than 128 MB for improved performance.
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- Ensured the pipeline always closes properly to prevent resource leaks.
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## v0.2.43 (2025-06-04)
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- Improved performance by omitting logs in metadata calls and ensuring output schema compliance in value streaming.
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- Ensured the connection is properly closed after use.
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- Aligned output format to strictly adhere to the specified schema.
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- Stopped sending internal logs in metadata requests to improve privacy.
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## v0.2.42 (2025-06-04)
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- Added timestamps to track the start and end of a request's run.
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- Added tracer information to the configuration settings.
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- Added support for streaming with tracing contexts.
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## v0.2.41 (2025-06-03)
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- Added locking mechanism to prevent errors in pipelined executions.
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@@ -261,6 +261,7 @@ nav:
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- MCP Adapters: reference/mcp.md
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- LangGraph Platform:
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- Server API: cloud/reference/api/api_ref.md
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- Server changelog: cloud/reference/langgraph_server_changelog.md
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- Control Plane API: cloud/reference/api/api_ref_control_plane.md
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- CLI: cloud/reference/cli.md
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- SDK (Python): cloud/reference/sdk/python_sdk_ref.md
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