---
title: "world-stepgame-formats — Mova code model"
description: "Mova code model of world/src/stepgame.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/world/src/stepgame.rs.groupant/formats.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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# world-stepgame-formats

The groupant beside world/src/stepgame.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:** [`world/src/stepgame.rs`](https://github.com/ElamurAI/mova-free/blob/main/world/src/stepgame.rs)
- **source SHA-256:** `56231f07cd9c54f1…`
- **covers:** load branches by txt extension else BTreeMap JSON. Text skips no-space lines, clears at exact '1', emits question for >=2 tab fields else appends story. agents returns unique single ASCII capitals in encounter order. (bytes 1637–3760)
- **part of:** [world-stepgame](https://md.groupants.elamur.ai/free/en/mova/world/src/stepgame.rs.groupant/)
- **repository folder:** [`world/src/stepgame.rs.groupant/formats.groupant`](https://github.com/ElamurAI/mova-free/tree/main/world/src/stepgame.rs.groupant/formats.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` |
| **composition** | partial | [composition](#composition) |
| **cost** | partial | [Cost](#cost) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | `model.md` |
| **tests** | bounded checks partial scope | [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) |
| `reset_marker` | reset_marker | partial source derived model | [reset_marker](#reset-marker) |
| `support_erasure` | support_erasure | partial source derived model | [support_erasure](#support-erasure) |
| `agent_domain` | agent_domain | partial source derived model | [agent_domain](#agent-domain) |
| `failure_order` | failure_order | partial source derived model | [failure_order](#failure-order) |

## Model text


### descriptant

#### world-stepgame-formats

load branches by txt extension else BTreeMap JSON. Text skips no-space lines, clears at exact '1', emits question for >=2 tab fields else appends story. agents returns unique single ASCII capitals in encounter order.

##### Modeling epoch — 2026-10-31

Read full assigned source before editing; prospective predictions retained in external wave29 receipts. This child binds only its stated half-open UTF-8 byte range; other APIs remain parent scope. Evidence is limited to named bounded fixtures; registration is partial modeling. Production behavior unchanged; only inline synthetic tests added to four assigned sources.

### approximant

#### Forward relation

load branches by txt extension else BTreeMap JSON. Text skips no-space lines, clears at exact '1', emits question for >=2 tab fields else appends story. agents returns unique single ASCII capitals in encounter order.

##### Domain and resource limits

Finite valid structures and allocation-success executions under the branch conditions in models.md; integer overflow is outside measured fixtures. Exact categorical relations have no supplied percent surrogate. Macro expansion, arbitrary model quality and external effects are not inferred from syntax.

### invariant

## Invariant

Text id is emitted index, not source line number; questions never append to story; empty text emits none.

### Cost

O(B+copied story bytes), quadratic duplication possible with many questions; JSON sort O(NlogN).

### composition

#### Composition

This scope contributes formats to its parent. Its forward, complement and preimage are restricted to the bound byte interval. The parent syntax projection is referenced once through ../syntax.json; no independent semantic AST is claimed.

### models

### behavior_complement

Exclude retaining pre-reset story or duplicate agents; invalid JSON id keys are tolerated as zero.

### reverse_reconstruction

Items admit arbitrary ignored support fields; invalid numeric keys all map to zero and stable sort preserves lexical BTreeMap order among ties.

### reset_marker

1 clears, 01 does not.

### support_erasure

Third and later tab fields are discarded.

### agent_domain

AA and non-ASCII capitals are not single ASCII agents.

### failure_order

Read/UTF8 error before JSON parse; text malformed rows may be skipped rather than error.

### tests

#### Bounded checks

Named checks associated with this source (not every fragment branch):

- stepgame::wave29_tests::lexical_ground_and_tie_boundaries
- stepgame::wave29_tests::graph_first_path_and_text_reset
- tests03::stepgame_lexical_reader_reads_new_phrasings
- tests03::stepgame_phrasing_and_corrected_format

17 unique named tests in total passed twice debug and twice release; sorted named outcomes equal across all four runs. Four compiled controls cover bAbI identity, StepGame tie ordering, parser-command state removal and bench-command CPU selection; each exits101 at a runtime assertion, exact source restored then positive exit0. Other sources have finite adversarial fixtures but no separately compiled mutant.

CLI integration coverage is command construction and temporary cleanup only; legacy school/model/cadence paths are not executed. No speed benchmark, GPU, live teacher, datasets or held-out replay.

Limits:

- Partial syntax projection only; no macro expansion or proof
- No useful percentage surrogate for exact categorical/state/effect semantics; executable approximant unsupported
- No dataset training, eval/contrast or GPU
- No overflow/allocation fault injection

External receipt root: $MOVA_DATA/runs/octopus-wave29-worldeval-2026-10-31.