Elamur Groupantsmova-nightingale-register
The groupant beside tools/nightingale/src/register.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 | Forward approximant |
| Ast | partial | syntax.json |
| Composition | partial | Composition |
| Cost | partial | Cost |
| Descriptant | present | Descriptant |
| Invariant | partial | Invariant |
| Tests | finite evidence | Tests |
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.
| relation | type | label | where |
|---|---|---|---|
| Behavior complement | behavior complement | partial source derived model | Behavior complement |
| Reverse reconstruction | reverse reconstruction | partial source derived model | Reverse reconstruction |
Model text
Descriptant
Register labels lang[-dialect]/style[+style] and their facets over the language's standard (dialect:X, style:Y; style general is the standard). Source: tools/nightingale/src/register.rs.
Forward approximant
parse -> Register; label() round-trips; facets() sorted, deduplicated; say() for English answers.
Invariant
label(parse(s)) = s for every accepted s; a facet list never holds style:general.
Cost
O(len).
Composition
Parent: nightingale.
Behavior complement
Infers no style from text; refuses malformed labels. Evidence status: source-derived model with finite checks, not a proof.
Reverse reconstruction
The label string is the whole state; parse is injective on accepted labels.
Tests
Checks
register::tests: round trips, refusals, composed facets. These are finite fixtures and measurements; not a proof.
History
2026-11-06 · document
Epoch 2026-11-06
First model, written with the source (the Nightingale: one per language under the Eel; a standard naturalness model with variety deltas).
Provenance
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/tools/nightingale/src/register.rs.groupant/