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003b22a157
SessionSummary grows an optional projections column (whole value per key, same passthrough posture as the history-tail block): attached rows cut the live registry watermark cache; cold rows view the persisted projection cache's stored rows via the new registry viewCheckpoint face (version- matching keys only, zero I/O) — the RFC's motivating scenario, every session's title across a listing without loading one event log. The column is fail-soft and absence-coded: no registry, no cache row, or a throwing read serve the row without the column, never breaking the listing.
session-projection/
English | 中文
Session-projection capability family: the seam through which domain host plugins serve whole current values of log-derived per-session state to client carriers.
| Package | ctx key | Role |
|---|---|---|
session-projection |
sessionProjections |
The interface package: the merge-extensible SessionProjectionMap type table, the ProjectionDefinition unit contract, and the eagerly driven registry carriers read synchronously |
session-projection-cache |
sessionProjectionCache |
Persisted projection cache: durable per-session unit checkpoints over the domain data form, throttled write-behind with mandatory turn/end + detach points, and the cold-read ladder (cache row + persistence tail replay) |