---
title: "mlab-suite-run-gate — Mova code model"
description: "Mova code model of mlab/src/suite.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/mlab/src/suite.rs.groupant/run-gate.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**

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# mlab-suite-run-gate

The groupant beside mlab/src/suite.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_fragment
- **status:** partial source bound model
- **source:** [`mlab/src/suite.rs`](https://github.com/ElamurAI/mova-free/blob/main/mlab/src/suite.rs)
- **source SHA-256:** `9f7b9b196ad8e83e…`
- **covers:** Fresh runtime construction and fail-fast output equivalence. (bytes 3525–6795)
- **part of:** [mlab-suite](https://md.groupants.elamur.ai/free/en/mova/mlab/src/suite.rs.groupant/)
- **repository folder:** [`mlab/src/suite.rs.groupant/run-gate.groupant`](https://github.com/ElamurAI/mova-free/tree/main/mlab/src/suite.rs.groupant/run-gate.groupant)
- **repository commit:** `855da7bd4a7b`

> **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 | [approximant](#approximant) |
| **ast** | partial | `../syntax.json` |
| **cost** | symbolic source derived | [invariant](#invariant) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant](#invariant) |
| **tests** | executed bounded checks | [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) |
| `factory_count` | factory_count | partial source derived model | [factory_count](#factory-count) |
| `fault_transport` | fault_transport | partial source derived model | [fault_transport](#fault-transport) |
| `prefix_stats` | prefix_stats | partial source derived model | [prefix_stats](#prefix-stats) |
| `empty_gate` | empty_gate | partial source derived model | [empty_gate](#empty-gate) |

## Model text


### descriptant

#### mlab-suite-run-gate

Fresh runtime construction and fail-fast output equivalence.

##### Epoch 2026-10-31

Half-open source bytes [3525,6795); bound by parent source hash and scoped byte hash. Model covers only this fragment; parent composition explains joins.

### approximant

#### Scoped forward relation

Construct fresh interpreter for each run; gate runs tree then VM from new captures and stops first differing output.

##### Domain and gap

Source-generated states within resource limits. Categorical relation has no executable percent surrogate.

### invariant

#### Scoped invariant

N run_fs scenarios invoke mk_fs N times, including empty programs.

##### Cost

Sum of scenario execution plus fresh interpreter/FS creation; gate performs two runs per visited scenario and stops at first mismatch; no time limit.

### models

## Scoped typed relations

### behavior_complement

First output mismatch excludes evaluating remaining scenarios. Equal engine output does not exclude shared erroneous builtin behavior; run_fs excludes default workspace sharing.

### reverse_reconstruction

Same outputs can come from shared faulty builtin; first mismatch restricts observed prefix only.

### factory_count

N run_fs scenarios invoke mk_fs N times, including empty programs.

### fault_transport

Same fault string supplied to tree and VM; vm:add intentionally affects only VM.

### prefix_stats

Mismatch scenario contributes totals and static/dynamic counts before break.

### empty_gate

Empty input returns all-zero default report.


### tests

#### Evidence scope

Parent selected tests: wave30_synthetic_suite_boundaries, wave30_synthetic_gate_fail_fast. This fragment shares parent syntax and finite checks; no separate test count or complete fragment coverage claim. Assertion-control association and unexecuted paths are in parent tests.md and source-test-map.json.