Key-Value Stores
Overwrites history. Can't answer 'what changed?' or 'why?' No relationships, no temporal queries.
Amnesia with a notepad
Give your AI
a mind of its own.
LeftFold equips your AI with domain modeling primitives and lets it decide what to build. You just talk.
See how it works ↓CURRENT STATE
- name
- Jane Smith
- phone
- 0413 987 654
- nextBooking
- Thursday 2pm
- quoteAmount
- $12,400
- status
- accepted
Current AI memory is forgetful.
Every “AI memory” product stores flat facts in a key-value store. They remember that Jane is a client. They can't tell you she became one on March 15th through a referral from Mike, or that you quoted her bathroom renovation at $12k and she accepted on the 28th.
Vector / RAG
Semantic similarity search. Can't answer 'what happened over time?' Loses structure and causality by design.
Good at vibes, bad at facts
Event Sourcing
Records what happened, when, and why. Current state is derived by replaying history. Full audit trail. Schema evolution.
Complete knowledge
Append. Fold. Query.
Three concepts that give your AI a structured, auditable memory that grows with every conversation.
01
Append
Events flow in naturally
As you talk, your AI identifies information worth structuring and records it as events — immutable, timestamped, typed. “Jane called about a bathroom renovation” becomes a ContactCreated event with structured data. Nothing is lost, nothing is overwritten.
10:23▲ ContactCreatedJane Smith
10:24▲ BookingCreatedTue 10am, site visit
10:24▲ ContactUpdatedphone: 0412 345 678
14:30▲ QuoteRequestedBathroom reno, $12.4k
15:01▲ BookingConfirmedstatus → confirmed
02
Fold
Events become current state
When your AI needs to know the current state of anything, it “folds” the event history — replaying events in order, merging changes. Five events about Jane become one clean picture: her name, phone, booking status, quote amount. The fold is computed on demand, always fresh.
▲ JANE SMITH
- name
- Jane Smith
- phone
- 0412 345 678
- nextBooking
- Tuesday 10am
- quoteAmount
- $12,400
- status
- confirmed
03
Query
Ask anything about your world
Your AI formulates structured queries and LeftFold does the heavy lifting — folding events, joining across domains, grouping, sorting, and computing summaries. Results are cached and auto-invalidated when new events arrive.
> What's on today?
Site visit at Jane's at 10am to quote the bathroom reno. Her number is 0412 345 678 if you need to confirm.
Your AI is the architect.
LeftFold doesn't tell your AI what to remember. It hands the AI domain modeling primitives — aggregates, events, schemas — and lets it decide what matters. When you mention a client, the AI decides whether that's a new domain concept or an event on an existing one. It defines the language. It chooses the boundaries. It evolves the schema as its understanding deepens.
Other products force an AI to make notes in a notebook.
LeftFold gives AI the framework and tools to make its own decisions.