langgraph

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Sydney RunkleandClaude Sonnet 4.6 54ee1b5b1e fix(checkpoint-postgres): single-roundtrip CTE query + write-ordering fix

Replaces the three sequential SELECT roundtrips in _get_channel_writes_history
(checkpoints, checkpoint_writes, checkpoint_blobs) with one combined
UNION ALL query tagged by a _kind discriminator column. Both sync and async
paths now do one execute + one fetchall regardless of pipeline mode.

_build_delta_channel_writes_history is updated to accept the single tagged
rows list and dispatch on _kind while building its lookup dicts; the three
old SQL constants are removed.

Also fixes write-collection ordering in _build_delta_channel_writes_history:
the seed-terminator blob check previously fired before collecting that
ancestor's writes, silently dropping the transition writes needed to
reconstruct the child's state. Writes are now collected first.

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

2026-04-30 14:49:05 -04:00

checkpoint

fix(checkpoint): diamond pattern replaces ContextVar re-entrancy guard

2026-04-30 14:49:05 -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(checkpoint-postgres): single-roundtrip CTE query + write-ordering fix

2026-04-30 14:49:05 -04:00

checkpoint-sqlite

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