---
title: "mova-nautilus-replay — Mova code model"
description: "Mova code model of tools/nautilus/src/replay.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/tools/nautilus/src/replay.rs.groupant/"
---
Elamur: [Mova](https://md.mova.elamur.ai/free/en/) · [Dictionary](https://md.dictionary.elamur.ai/free/en/) · [Research](https://md.research.elamur.ai/free/en/) · **Groupants**

This page as HTML: <https://groupants.elamur.ai/free/en/mova/tools/nautilus/src/replay.rs.groupant/>

# mova-nautilus-replay

The groupant beside tools/nautilus/src/replay.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

- **kind:** groupant
- **status:** partial source bound model
- **source:** [`tools/nautilus/src/replay.rs`](https://github.com/ElamurAI/mova-free/blob/main/tools/nautilus/src/replay.rs)
- **source SHA-256:** `1eeca46ad2b11373…`
- **repository folder:** [`tools/nautilus/src/replay.rs.groupant`](https://github.com/ElamurAI/mova-free/tree/main/tools/nautilus/src/replay.rs.groupant)
- **repository commit:** `48f2e6f74146`

> **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 derived | [Forward approximant](#forward-approximant) |
| **ast** | partial | `syntax.json` |
| **composition** | partial source derived | [Composition](#composition) |
| **cost** | partial source derived | [Cost](#cost) |
| **descriptant** | present | [Descriptant](#descriptant) |
| **invariant** | partial source derived | [Invariant](#invariant) |
| **tests** | finite evidence | [tests](#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.

| id | type | label | where |
|---|---|---|---|
| `behavior_complement` | behavior_complement | partial source derived model | [behavior_complement](#behavior-complement) |
| `reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) |

## Model text


### model

## mova-nautilus-replay

### Descriptant

Replay: measure the loop on copies with earlier real answers. earlier(roots) reads tasks/*.md and answers/*.txt, the dictionary name of each question (both templates), answers by (name, word); run copies each configured layer's asked rows to OUT/layers, runs work::Loop with a Replayer terminal (draft: `new: <old sense>`; layer: the asked fields from the old columns, pick new when a sense field is written) and one store OUT/senses.jsonl, and reports questions, bytes, words per question, native picks (and their agreement with the earlier teacher's text), junk, thin, numbered/same/new/restates. Source: `tools/nautilus/src/replay.rs`.

### Forward approximant

roots -> earlier questions and answers -> per layer: subset copy -> Loop steps until idle (min_gap 0, operator word 'replay', no ledger) -> proposals -> counts -> JSON report.

### Invariant

Reads the terminal roots and the configured files only; writes only under OUT; the same inputs give the same report and store bytes (checked twice on 2026-11-04).

### Cost

One loop run per layer over the copied rows; O(rows x examples) planning.

### Composition

Parent: `nautilus`. Uses animal::Config, work::Loop, teacher::Config, improve::teacher_fields, senses.

### behavior_complement

Never sends anything to a teacher or terminal; never writes the live folders or the layer files; the agreement figure is a lexical proxy, not gold. Evidence status: source-derived model with finite checks, not a proof.

### reverse_reconstruction

The report recovers per-layer counts; OUT/state holds every replayed journal and proposal. The earlier answers are not reconstructed from it.

### Epoch 2026-11-04

First model, written with the source; prospective: on new runs the native share stays near the replay's 10% and restatements near 10% of written senses.

### tests

#### Checks

Command: cargo test --release --manifest-path tools/nautilus/Cargo.toml --offline --locked with MOVA_OCTOPUS_TEST_MODEL=$MOVA_DATA/download/0/0.4/en.bin.

2026-11-04: dictionary_names_of_both_templates; two replay runs on a snapshot of six instances' 129 questions gave byte-identical reports and stores.
Finite fixtures; no teacher or model was called; not a proof.