langgraph

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Sydney RunkleandClaude Sonnet 4.6 038f26472d fix(checkpoint): prune preserves checkpoint_writes needed for DeltaChannel reconstruction

InMemorySaver.prune now walks the parent chain from the latest checkpoint
and keeps all ancestors whose writes are still needed for DeltaChannel
reconstruction — i.e. ancestors with DELTA_SENTINEL blobs where no
_DeltaSnapshot has been written yet in the kept ancestry.

Once a _DeltaSnapshot blob exists for all sentinel channels (provided by
snapshot_frequency), the walk terminates and older checkpoints plus their
writes and blobs are safely deleted.

With snapshot_frequency=None (pure delta), all intermediate checkpoints
are retained since the full write history is required. Setting
snapshot_frequency=N bounds the kept ancestry to N steps.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

2026-04-28 15:52:36 -04:00

checkpoint

fix(checkpoint): prune preserves checkpoint_writes needed for DeltaChannel reconstruction

2026-04-28 15:52:36 -04:00

checkpoint-conformance

chore(deps): bump langsmith from 0.7.3 to 0.7.31 in /libs/checkpoint-conformance (#7523 )

2026-04-15 19:36:27 -07:00

checkpoint-postgres

fix: format import order in checkpoint and checkpoint-postgres

2026-04-27 20:46:16 -04:00

checkpoint-sqlite

chore(deps): bump langsmith from 0.6.4 to 0.7.31 in /libs/checkpoint-sqlite (#7524 )