Elamur Groupantsmova-nightingale-round
The groupant beside tools/nightingale/src/round.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
The Eel's lm-<lang> round child: newest ready handoff (or a build), installed vs candidate on the frozen dev sample, the Eel's native round report. Source: tools/nightingale/src/round.rs.
Forward approximant
args -> freeze dev (>= 1 000 tokens) -> candidate -> bits per token of current (or base, or the empty model) and candidate -> OUT/round.json, train.ids, dev.ids, candidate/{model.ngl, meta.json, deltas.tsv}.
Invariant
dev_sha256 is the frozen sample's; train and dev ids are disjoint; the installed lineage measures equal (no gain without new text).
Cost
Two model loads and two passes over the dev sample (seconds to a minute).
Composition
Parent: nightingale.
Behavior complement
Never writes the Eel's state; never installs. Evidence status: source-derived model with finite checks, not a proof.
Reverse reconstruction
round.json names both lineages, the generation and the gain.
Tests
Checks
tests/model.rs: first round wins against nothing, no gain with the installed lineage. These are finite fixtures and measurements; not a proof.
History
2026-11-06 Ā· 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 ā https://md.groupants.elamur.ai/free/en/mova/tools/nightingale/src/round.rs.groupant/