---
title: "roundtrip-tests-synthetic_residuals — Mova code model"
description: "Mova code model of tools/roundtrip/src/tests.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/tools/roundtrip/src/tests.rs.groupant/synthetic_residuals.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/roundtrip/src/tests.rs.groupant/synthetic_residuals.groupant/>

# roundtrip-tests-synthetic_residuals

The groupant beside tools/roundtrip/src/tests.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:** [`tools/roundtrip/src/tests.rs`](https://github.com/ElamurAI/mova-free/blob/main/tools/roundtrip/src/tests.rs)
- **source SHA-256:** `7d1dbfa26a29fb87…`
- **covers:** Synthetic residual witnesses (bytes 883–4672)
- **part of:** [roundtrip-tests](https://md.groupants.elamur.ai/free/en/mova/tools/roundtrip/src/tests.rs.groupant/)
- **repository folder:** [`tools/roundtrip/src/tests.rs.groupant/synthetic_residuals.groupant`](https://github.com/ElamurAI/mova-free/tree/main/tools/roundtrip/src/tests.rs.groupant/synthetic_residuals.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** | partial | [invariant-and-cost](#invariant-and-cost) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant-and-cost](#invariant-and-cost) |
| **tests** | 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) |
| `residual_witness` | residual_witness | partial source derived model | [residual_witness](#residual-witness) |
| `scope_precondition` | scope_precondition | partial source derived model | [scope_precondition](#scope-precondition) |
| `resource_boundary` | resource_boundary | partial source derived model | [resource_boundary](#resource-boundary) |
| `observation_projection` | observation_projection | partial source derived model | [observation_projection](#observation-projection) |

## Model text


### descriptant

#### Synthetic residual witnesses

2026-10-31 epoch: source scope bytes [883,4672); Three initial fixtures cover projective orders, parsed-realized scripts, and world dedup/sentence reconstruction; all avoid the optional model loader.

No annotator/model loading, live corpus, full suite, teacher, GPU or persistent-learning evidence. No executable percentage surrogate: categorical codecs/effects need a useful metric before future caps 1/2/5/10%.

### approximant

#### Synthetic residual witnesses

Three initial fixtures cover projective orders, parsed-realized scripts, and world dedup/sentence reconstruction; all avoid the optional model loader.

Domain: bounded synthetic values, valid source-specific coordinates, nonoverflowing counts, available allocation; fixed environment controls. Relations are source-derived partial models with finite checks, not universal proofs.

### catalog

### behavior_complement

Subject: roundtrip-tests-synthetic_residuals, source hash 7d1dbfa26a29fb87a9562f16de3dfbe0542e87b7db28ef675a358a9471f3153c, transition observation.

For Synthetic residual witnesses, excluded transitions violate the stated scoped rule: Three initial fixtures cover projective orders, parsed-realized scripts, and world dedup/sentence reconstruction; all avoid the optional model loader. This is an inner source-derived exclusion under the domain, not a complement of arbitrary unseen runtime behavior.

Domain: bounded synthetic values, valid source-specific coordinates, nonoverflowing counts, available allocation; fixed environment controls. Relations are source-derived partial models with finite checks, not universal proofs.

Evidence: external wave32 rt_core receipt includes native-commands.json, exact named outcomes twice debug/twice release, raw status/log files, compiled production controls with byte restoration and paired syntax. Only named synthetic helpers execute; model_path/export and live CLI paths have representation/source evidence.

Status: partial source-derived model.

### reverse_reconstruction

Subject: roundtrip-tests-synthetic_residuals, source hash 7d1dbfa26a29fb87a9562f16de3dfbe0542e87b7db28ef675a358a9471f3153c, transition observation.

Fix outputs and post-state of synthetic_residuals; compatible antecedents are all scoped inputs/pre-state satisfying: Three initial fixtures cover projective orders, parsed-realized scripts, and world dedup/sentence reconstruction; all avoid the optional model loader. Fields outside this byte scope are held fixed; discarded fields remain ambiguous.

Domain: bounded synthetic values, valid source-specific coordinates, nonoverflowing counts, available allocation; fixed environment controls. Relations are source-derived partial models with finite checks, not universal proofs.

Evidence: external wave32 rt_core receipt includes native-commands.json, exact named outcomes twice debug/twice release, raw status/log files, compiled production controls with byte restoration and paired syntax. Only named synthetic helpers execute; model_path/export and live CLI paths have representation/source evidence.

Status: partial source-derived model.

### residual_witness

Subject: roundtrip-tests-synthetic_residuals, source hash 7d1dbfa26a29fb87a9562f16de3dfbe0542e87b7db28ef675a358a9471f3153c, transition observation.

tree_script and world reconstruction tests compare full structures then remove inserts/patches/toggles and require inequality; this checks residual dependence, not normal-mode equivalence.

Domain: bounded synthetic values, valid source-specific coordinates, nonoverflowing counts, available allocation; fixed environment controls. Relations are source-derived partial models with finite checks, not universal proofs.

Evidence: external wave32 rt_core receipt includes native-commands.json, exact named outcomes twice debug/twice release, raw status/log files, compiled production controls with byte restoration and paired syntax. Only named synthetic helpers execute; model_path/export and live CLI paths have representation/source evidence.

Status: partial source-derived model.

### scope_precondition

Subject: roundtrip-tests-synthetic_residuals, source hash 7d1dbfa26a29fb87a9562f16de3dfbe0542e87b7db28ef675a358a9471f3153c, transition observation.

Synthetic residual witnesses requires the coordinate/state assumptions of this fragment; inspect its exact byte range. Three initial fixtures cover projective orders, parsed-realized scripts, and world dedup/sentence reconstruction; all avoid the optional model loader. Invalid arbitrary state is outside the reconstruction law.

Domain: bounded synthetic values, valid source-specific coordinates, nonoverflowing counts, available allocation; fixed environment controls. Relations are source-derived partial models with finite checks, not universal proofs.

Evidence: external wave32 rt_core receipt includes native-commands.json, exact named outcomes twice debug/twice release, raw status/log files, compiled production controls with byte restoration and paired syntax. Only named synthetic helpers execute; model_path/export and live CLI paths have representation/source evidence.

Status: partial source-derived model.

### resource_boundary

Subject: roundtrip-tests-synthetic_residuals, source hash 7d1dbfa26a29fb87a9562f16de3dfbe0542e87b7db28ef675a358a9471f3153c, transition observation.

Synthetic residual witnesses: allocations/clones and recursion/scans within this scope are retained. Parent cost bound is conservative for this subroutine: Finite fixture work bounded by fixed words/frames plus called helper costs. Compilation includes all tests but only exact named safe tests execute; model() and its filesystem/model-load effects remain excluded.

Domain: bounded synthetic values, valid source-specific coordinates, nonoverflowing counts, available allocation; fixed environment controls. Relations are source-derived partial models with finite checks, not universal proofs.

Evidence: external wave32 rt_core receipt includes native-commands.json, exact named outcomes twice debug/twice release, raw status/log files, compiled production controls with byte restoration and paired syntax. Only named synthetic helpers execute; model_path/export and live CLI paths have representation/source evidence.

Status: partial source-derived model.

### observation_projection

Subject: roundtrip-tests-synthetic_residuals, source hash 7d1dbfa26a29fb87a9562f16de3dfbe0542e87b7db28ef675a358a9471f3153c, transition observation.

Observe only outputs/state produced by Synthetic residual witnesses, holding caller state fixed. Three initial fixtures cover projective orders, parsed-realized scripts, and world dedup/sentence reconstruction; all avoid the optional model loader. Downstream aggregation is not an injective observation of this scope.

Domain: bounded synthetic values, valid source-specific coordinates, nonoverflowing counts, available allocation; fixed environment controls. Relations are source-derived partial models with finite checks, not universal proofs.

Evidence: external wave32 rt_core receipt includes native-commands.json, exact named outcomes twice debug/twice release, raw status/log files, compiled production controls with byte restoration and paired syntax. Only named synthetic helpers execute; model_path/export and live CLI paths have representation/source evidence.

Status: partial source-derived model.

### tests

#### Scoped evidence

Evidence: external wave32 rt_core receipt includes native-commands.json, exact named outcomes twice debug/twice release, raw status/log files, compiled production controls with byte restoration and paired syntax. Only named synthetic helpers execute; model_path/export and live CLI paths have representation/source evidence.

Coverage is limited to this fragment's reached branches; parent tests do not prove every scoped branch.

### invariant-and-cost

#### Scoped invariant and cost

Three initial fixtures cover projective orders, parsed-realized scripts, and world dedup/sentence reconstruction; all avoid the optional model loader.

Finite fixture work bounded by fixed words/frames plus called helper costs. Compilation includes all tests but only exact named safe tests execute; model() and its filesystem/model-load effects remain excluded.

The parent bound is conservative; unrelated parent effects are excluded from this fragment.