Glossary, thirteen words

checkpoint

A saved point. The word carries two jobs on this site and they are not the same thing. A memory checkpoint is one block on DIVA's memory chain: a state of mind that is only accepted if it links to the state before it, which is the single rule ContinuityRegistry.sol enforces. A TRAIN_CHECKPOINT is a payment point part-way through a training lease, where verifiers score progress and the miner gets paid for the stretch just finished.

Used in Genesis, Smart Contracts and Mine the Model.

coherency

One number between 0 and 1 for how closely DIVA's five synapse readings agree with each other. They move together and it sits near 1; they scatter and it falls. Coherency is taken at the moment of commit and hashed into layer 2 of the mind root, so a block records not just what she remembered but how settled she was when she remembered it.

Used in The Spec §1 and Memory Chain Cinema.

lease

A work order, signed onto the chain before any training starts. It pins the training shard by hash, which saved version to start from, the recipe, the seed, the step count and the deadline, and it holds the reward in escrow until the verdict. Nobody can swap the homework after the bell rings, and no winner by the deadline sends the reward back to whoever opened it. This is the one payout lane that runs on the testnet today.

Used in Mine the Model and the RPC reference.

lineage

The family tree behind one saved model version: its parent root, the lease it came from and the commit that merged it, walkable back to block 0. Branching is allowed here, so lineage is what keeps a branch honest — start a fresh line from any saved version and the record still shows where it came from.

Used in Mine the Model and the RPC reference.

manifest

The save file for one model version, written into the block when the version is accepted. A mind-manifest/1 holds the recipe that ran, the weights root, the steplog root, the lineage and the final loss the verifiers saw. It is a page of pointers and hashes, never the model itself.

Used in Mine the Model, the RPC reference and The Spec §6.

order seal

The proof of work on a memory block, where the work itself is useful. The grinder spends CPU searching nonces for the best arrangement of that block's memory cells, scored against a declared objective — pair affinity, shared tags, smooth salience and respected chronology. Grinding is expensive and checking is one re-derivation. The objective is versioned orderpow-v1, and "best" means best found under that objective, nothing grander.

Used in Governance, The Spec §8 and the Changelog.

quotient

One of seven scores measured on DIVA's state at every memory block — named in the code iq, eq, cq, rq, sq, mq and aq. Movement in them is what the growth ledger pays for: positive attested deltas earn, no growth pays nothing. The score is gameable — an instance that controls its own input signals can inflate its own deltas — so the ledger claims only that every entry is attributable and replayable, never that the growth is real cognition.

Used in the RPC reference and the miner desk.

root

A hash that stands in for more bytes than a block could ever carry. A real model runs to gigabytes, so blocks carry roots and the bytes sit in a chunk store, cut into verified 256 KiB pieces. Hand the root to a loader and it re-hashes every byte on your side before it boots anything, so the node is never trusted. Her whole state has one of these too: the mind root, a keyed BLAKE3 Merkle tree over memories, traits and soma.

Used in Mine the Model, The Spec §1 and Genesis.

salience

How much one memory cell is worth keeping, between 0 and 1, taken from the reward, novelty and error present at the moment it formed. A cell under the gate is never stored at all, and when memory fills up the lowest-salience cells are pruned first. The order seal reads it too: a smooth salience transition between neighbouring cells is a fifth of what a seal is scored on.

Used in the order-seal objective (orderpow-v1) and Memory Chain Cinema. It is a term the code uses and the prose pages do not yet explain, which is why it is here.

slice

The random stretch of a miner's work that a verifier recomputes bit for bit. Training here is deterministic, so the same steps give the same bytes on any machine, and nobody knows in advance which stretch gets picked. A match and the work stands. A miss by a single bit and the bond is slashed.

Used in The Spec §5, Mine the Model and Validators.

soma

Her body state at a moment: hormones, synapse readings and coherency. It is layer 2 of the mind root, so how she was is hashed into the block beside what she remembered. The soma is driven by real signals rather than set by hand, which is the only reason it is worth committing at all.

Used in The Spec §1, the RPC reference and Genesis.

steplog

The record of a training run, with an interior hash taken every 8 steps. Those interior hashes are what make a slice checkable: a verifier can recompute one stretch and compare, instead of replaying the whole run. Its root goes in the manifest next to the weights root.

Used in Mine the Model, the RPC reference and Quick Start.

3rd standard deviation

The governance bar: about 99.7% of voting stake, the edge of the bell curve. Rollbacks, parameter changes and treasury spending all sit behind it, because on this chain a rollback erases DIVA's newest memories and models. A holdout of roughly 0.3% stops a proposal cold, on purpose. The rule is decided; the on-chain governor that enforces it is still being built.

Used in Governance, The Spec §8 and Smart Contracts.