| ActionTx |
A signed action intent broadcast to peers: ⟨SequenceID, ActorID, Kind, Target, Payload, TickEpoch, Signature⟩. The unit of multiplayer traffic. Target is the address half, Payload the value half, and for a slab mutation the two together are exactly one delta record (A-03). |
10 |
| assetc |
The asset compiler: parses authoring text, validates against schema, lowers to FlatBuffers/WASM data. Watch mode in dev, pack mode for release. |
09 |
| BVH |
Bounding volume hierarchy over active SDFs, so a ray skips an entity in O(log N) unless it actually hits its coarse bounds. |
04 |
| Camera anchor |
The integer world position local (f32) space is measured from this frame: P_local = P_global − C_global. |
02 |
| Causal order |
The Lamport/HLC ordering of transactions inside an epoch; not wall-clock order. |
10 |
| Closed form |
A rule whose state at any tick is computed directly, without stepping through intermediate ticks. What makes fast-forward legal. |
05 |
| Compaction |
The epoch-commit step: bake outstanding deltas into a new genesis state, recompute roots, reset slab bump pointers. The LSM-tree analogy. |
03 |
| Circuit graph |
The compiled topology of a connected wire network: nodes, zero-latency edges, transfer function f(I₁…Iₙ, t). |
06 |
Delta mask (M_local) |
The sparse set of player-authored differences from base state. The world's only memory of what the player did. |
03 |
| Delta record |
The one u64 a slab appends: |16 region slot|36 intra-region (3×12 bits)|12 payload| — ADR-029's layout, drafted as contracts/delta.rs (A-03). It is the whole memory of an edit, and the only thing a replay needs to find the voxel it changed. |
03 |
| Determinism boundary |
Simulation state is computed in Rust/WASM and never by a shader. ADR-017. |
03 |
| Domain deformation |
Animation by warping the space an SDF is evaluated in, instead of moving vertices. |
07 |
| Epoch |
One committed world state, identified by a root hash. The ledger is a sequence of epochs. |
03 |
| Event tag |
A named, versioned macro-causal fact in the ledger (e.g. FlowBlocker{region, magnitude}). The canonical form of macro causality. |
05 |
| Field (macro) |
A per-region scalar/vector (water table, fertility, population density) evolved by a rule with a declared jump method. |
05 |
| FlexBuffers |
FlatBuffers' schema-free variant, for genuinely dynamic payloads. |
09 |
| Epoch root |
The 32-byte BLAKE3 digest of one epoch's whole commitment: genesis ‖ slot table ‖ regions ‖ events, in that order, over the ADR-030 tree shape. What a peer sends a peer, and the only thing a desync check can compare. Published as a vector: EPOCH_0 91b97a52… agrees byte-for-byte on x86-64 Linux, x86-64 Windows and ARM64 macOS. |
03 |
| Fuel metering |
WASM instruction budget per call; without it a mod's infinite loop freezes the client. |
08 |
| HDCS |
64-bit Hierarchical Double-Origin Coordinate System — integer global space, float camera-relative space. ADR-016. |
02 |
| Hot reload |
Edit a text asset or shader, see it in the running game without a restart. |
09 |
| Intensional commitment |
Hashing the rule that generates a thing instead of its output. How ADR-030's tree shape handles base terrain: seed ‖ base_rule_id ‖ rule_version goes into the root, not the region's 2³⁶ unedited voxels. The cost is that a rule change invalidates every root — which is exactly the visibility the design wants. |
03 |
| Jump method |
How a macro rule advances by Δt: closed_form, matrix_exp, integral, or iterative {cap}. Every rule must declare one. |
05 |
| Lazy evaluation |
Nothing is computed until something needs it. The engine's answer to unloaded chunks. |
01 |
| Ledger |
The append-only record of epochs, transactions and event tags. Holds roots and deltas — never block arrays. |
03 |
| Macro / micro |
Macro = region-level fields evolved per epoch (cheap, simulated). Micro = voxels, entities, fluids in view (expensive, rendered). |
05 |
| Material function |
A color/surface definition as a function of (p, n, t). No texture files exist in this project. |
04 |
| Mempool |
Transactions committed but not yet compacted into an epoch. |
03 |
| Morton code |
Z-order curve key for region traversal and octree indexing. Computed on RegionKey, never on raw voxel coordinates. |
02 |
| Node grammar |
The declarative shape/material vocabulary (RoundedBox, SmoothUnion, Repeat, Voronoi…) interpreted by the master shader. ADR-012. |
04 |
| Octree root |
A region's Merkle root derived from its children. Local, so edits don't re-hash the world. |
03 |
| Prompt-to-mod |
In-game LLM authoring that emits RON + WGSL + WASM, then runs the same validation path as a hand-written mod. |
08 |
| Region |
4096³ voxels, addressed by RegionKey (3×i64). The unit of the Merkle tree and of slab keying. |
02 |
| Region slot |
One epoch's temporary 16-bit index for a region, assigned in first-touch order, held in the epoch header and rebuilt deterministically at replay — what a delta record carries so the 3×i64 region key itself never has to be packed. At most 65,536 distinct regions per epoch record stream. |
02 |
| RON |
Rusty Object Notation — the canonical in-repo authoring format (comments, trailing commas, maps 1:1 to structs). |
09 |
| Rollback |
Reverting an optimistic local edit by storing its previous u64 back into its slab slot. |
10 |
| SDF |
Signed distance function: negative inside, zero at surface, positive outside. The only geometry primitive. |
04 |
| Sector |
16³ regions; the granularity of named event tags. |
02 |
| Slab |
Per-region append-only record buffer (since ADR-029), pre-allocated and contiguous. Writes are O(1) appends; resets are bump-pointer → 0. Its geometry and capacity are unsettled (SPEC-06, measured by spike S2), its addressing is not. |
03 |
| Sphere tracing |
Raymarching where each step equals the SDF value — a guaranteed-empty distance. |
04 |
| Tree shape |
The arity, child order, empty-node rules and integer byte order that turn a digest into a root. ADR-028 chose the hash and deliberately did not choose this; ADR-030 and A-10 (contracts/tree.rs, frozen 2026-10-12) do, and crates/ledger executes it. Two peers agreeing on BLAKE3 but disagreeing on the shape compute different roots and neither errors. |
03 |
| Watch-list |
A region's registered interest in another region's field, for continuous drain/refill relationships. |
10 |
| WIT |
WASM Interface Types — the typed contract between the host engine and mods. |
08 |