Architectural Commitment 01 · Event Sourcing
Reconstruct what Avena knew on any date.
Every state change in Avena Terminal — every score revision, every regime classification, every AVM query, every grade change — is written to an append-only event log before the projection updates. The database is the operational view; the event log is the truth. Replay it at any timestamp to see the system as it existed then.
System state as of now
325
events recorded
2026-06-10 09:45:44
earliest
2026-07-10 06:45:54
latest
counterpart
210
prediction
32
limitation
31
regime
30
regulatory
21
memo
1
Last 0 events · methodology
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Why this exists
A CoStar M&A analyst asks "show me the system state on 2026-03-14." The honest answer for most data vendors is "we can't." The honest answer for Avena is this page. Event sourcing is foundational infrastructure: it cannot be retrofitted, and it turns "trust our backtest" into "replay the backtest yourself."