Elamur Groupantsworld-tune-neighbors
The groupant beside world/src/tune.rs in the Mova repository: what the code computes, what it never does, how to go back from its outputs, its invariants, cost and checks.
Facts
Implementation material. A Mova code model describes this code at one source revision: partial models, finite checks and their stated scope. It is not a reviewed general exposition, and its labels are shown as written, never raised.
Components
| component | label | where |
|---|---|---|
| approximant | partial source model | forward |
| ast | partial | ../syntax.json |
| composition | partial source model | composition |
| cost | partial source model | cost |
| descriptant | partial source model | epoch-memory |
| invariant | partial source model | invariant |
| tests | bounded native and inspected | ../model.md#evidence |
Obernants
The typed relations around the forward model: the behaviour complement (what the code never does), the reverse reconstruction (every input compatible with an output) and specialised views.
| id | type | label | where |
|---|---|---|---|
world-tune-neighbors-behavior-complement | behavior_complement | partial source model | behavior-complement |
world-tune-neighbors-reverse-reconstruction | reverse_reconstruction | partial source model | reverse-reconstruction |
world-tune-neighbors-tolerance-domain | floating_partition | partial source model | tolerance-domain |
world-tune-neighbors-one-key-transport | configuration_relation | partial source model | one-key-transport |
Model text
Subject: world/src/tune.rs SHA-256 932ebce85aebb89467cb9da0d82b136debed8b77f6a9f0b8e852336480db0adb. All entries share this exact revision. Status: partial source-derived relations, finite native evidence for pure seams, source inspection for effects. Domain: finite supplied inputs under the stated resource/arithmetic premises. Exclusions are inner source-derived families, not a complete behavioral complement. Reverse relations retain compatible antecedents but no complete inverse solver is implemented.
forward
show emits lexical BTreeMap order. For each knob select first value position p with abs(value-base[k])<1e-9; emit existing p-1,p+1 or all values if no match. Each output clones base and replaces only k; label includes current/new values. Default from the knob triple is ignored here.
behavior-complement
Universe: knob/base/candidate-list triples with every knob key present. Exclude nonadjacent emitted positions after a match, reordered knob declarations, or changing any other base key. Empty value lists exclude proposals. Duplicate/no-op maps are allowed.
reverse-reconstruction
Proposals lose unchosen list entries, ignored knob defaults and some declaration histories when maps/labels coincide. Nearby current values can share tolerance match. NaN never matches and preserves fallback behavior.
invariant
Pure read-only inputs; same map key set per result. Missing knob key panics. Duplicate/nonfinite values are retained, not validated. No global size cap.
cost
O(sum list lengths+DK+output bytes), output O(DK+bytes), transient list at most candidate-list length.
tolerance-domain
Strict tolerance uses the first match. Overlapping values can emit a no-op neighbor. NaN and infinity-minus-infinity do not match; supplied tests expose nonfinite fallback rather than asserting numeric safety.
one-key-transport
For selected k, c[j]=base[j] for all j!=k and c[k] is declared emitted value. Independent finite oracle checks 27 length/current combinations, labels and untouched y.
composition
Caller builds base from defaults first; helper enumeration precedes journal ordering. Therefore helper order is not final candidate index order.
epoch-memory
Wave14 first modeling epoch, 2026-10-30: preserves rendering and tuning selection semantics. Two public pure tuning seams are now actual production-path calls. Six rendering tests and four tuning tests record field loss, tolerance/duplicate behavior, strict selection thresholds and domain limits. No bug repair or speed claim. Existing semantics retained include newline passthrough, first key/last MId collision, zip truncation and unchecked score arithmetic. Evidence is finite; no parser, teacher, filesystem corpus, journal-backed tune, optimizer training or GPU execution.
limitations
Partial syntax binds source bytes; macro bodies remain opaque and semantic AST is absent. Native/structural checks are not universal proofs or full-system coverage. No approximation error budget or automatic substitution is claimed. File evidence distinguishes executed pure paths and inspected effects.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/world/src/tune.rs.groupant/neighbors.groupant/