Module session_store_v2 

Session Store V2 segmented append log + sidecar index primitives.

This module provides the storage core requested by Phase-2 performance work:

• Segment append writer
• Sidecar offset index rows
• Reader helpers
• Integrity validation (checksum + payload hash)

Structs

Checkpoint

Periodic checkpoint snapshot metadata.

IndexSummary

Manifest

ManifestCounters

ManifestFiles

ManifestIntegrity

ManifestInvariants

MigrationEvent

MigrationVerification

OffsetIndexEntry

SegmentFrame

SessionStoreV2

StoreHead

Current head position of the store (last written entry).

Constants

CHECKPOINT_SCHEMA

MANIFEST_SCHEMA

MIGRATION_EVENT_SCHEMA

OFFSET_INDEX_SCHEMA

SEGMENT_FRAME_SCHEMA

Functions

frame_to_session_entry

Convert a V2 SegmentFrame payload back into a SessionEntry.

has_v2_sidecar

Check whether a V2 sidecar store exists for the given JSONL session.

session_entry_to_frame_args

Extract the V2 frame arguments from a SessionEntry.

v2_sidecar_path

Derive the V2 sidecar store root from a JSONL session file path.