flowchart TB subgraph LEFT["Replay Command — lrs replay --from T1 --to T2 --into <table>"] direction TB A1["Read immutable log for district + time window"]:::la A2["Recompute projection, keyed by statement_id"]:::lasafe A3["Write into new shadow table
invisible to live queries"]:::la A4["Rebuild complete: atomic swap"]:::la A5["Shadow table becomes the live table"]:::la A1 --> A2 --> A3 --> A4 --> A5 end subgraph RIGHT["Rebuild Graph Command — lrs replay --rebuild-graph"] direction TB B1["Reset summarizer watermark to zero"]:::ra B2["Ordinary 60-second sync loop runs as normal"]:::ra B3["Summarizer reads 'unsynced' rollups
which is now all of them"]:::ra B4["MERGE upserts every summary vertex
guarded by the Grain Uniqueness Constraint"]:::rasafe B5["Graph fully rebuilt, no dedicated rebuild code path"]:::ra B1 --> B2 --> B3 --> B4 --> B5 end classDef la fill:#2a9d8f,stroke:#1f7a6f,color:#fff,font-size:13px classDef lasafe fill:#1a7f72,stroke:#0f5c53,color:#fff,font-size:13px classDef ra fill:#8fd3c9,stroke:#3bab9d,color:#0c2f2b,font-size:13px classDef rasafe fill:#5cbcb0,stroke:#3bab9d,color:#08312c,font-size:13px linkStyle default stroke:#999,stroke-width:2px