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

The groupant beside world/src/narr.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/narr.rs`](https://github.com/ElamurAI/mova-free/blob/main/world/src/narr.rs)
- **source SHA-256:** `bb5c39260b0854bf…`
- **covers:** relation_endpoint_oracle_and_atomic_pair enumerates interval assignments; unchain_stitches_and_pending_consumes_once exercises actual register/unchain/causal_stamp coupling. (bytes 38721–45054)
- **part of:** [world-narr](https://md.groupants.elamur.ai/free/en/mova/world/src/narr.rs.groupant/)
- **repository folder:** [`world/src/narr.rs.groupant/time-execution.groupant`](https://github.com/ElamurAI/mova-free/tree/main/world/src/narr.rs.groupant/time-execution.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 source model | [forward](#forward) |
| **ast** | partial | `../syntax.json` |
| **composition** | partial source model | [composition](#composition) |
| **cost** | partial source model | [cost](#cost) |
| **descriptant** | partial source model | [epoch-memory](#epoch-memory) |
| **invariant** | partial source model | [invariant](#invariant) |
| **tests** | partial source model | [checks](#checks) |

## 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 |
|---|---|---|---|
| `world-narr-time-execution-behavior-complement` | behavior_complement | partial source model | [behavior-complement](#behavior-complement) |
| `world-narr-time-execution-reverse-reconstruction` | reverse_reconstruction | partial source model | [reverse-reconstruction](#reverse-reconstruction) |
| `world-narr-time-execution-coupling` | composition_relation | partial source model | [coupling](#coupling) |

## Model text


Partial source-bound model, 2026-10-30. The reference is the exact sibling Rust source. The domain is valid finite typed values reachable through checked World::apply, except explicitly constructed graph/helper fixtures. Public mutable graph/frame fields are not defended against arbitrary corruption. No live parser, teacher, corpus, GPU or persistence is exercised.

### forward

Translate TRel to one/two endpoint inequalities; snapshot graph for batch rejection. register adds spans, placement/line, pending causes, bounds and metadata; unchain kills line/frame edges and stitches neighbors; causal_stamp deduplicates off-line real causes.

### invariant

relate rollback is local to its inserted relation. register is not independently atomic. Placement does not join line; soft causal contradictions record warnings.

### cost

relate clones graph and runs <=2 BFS; register BFS work per pending cause plus fixed edges; unchain scans stored edges and line ids.

### composition

relation_endpoint_oracle_and_atomic_pair enumerates interval assignments; unchain_stitches_and_pending_consumes_once exercises actual register/unchain/causal_stamp coupling.

### checks

Native narr::wave9_models tests exercise the bounded domains described in evidence.md at the file root. Ordinary test bodies have partial syntax projections; macro token contents are opaque. The graph oracle uses a dense three-state Floyd closure, not the implementation BFS/bitset algorithm. Typed commands call the real public World::apply boundary.

### epoch-memory

Initial modeling epoch: distinguish admitted graph states from arbitrary public-field edits, and internal mutation from public commit. No production bug was established. In particular narr::relate restores its multi-edge batch, and World::apply discards a cloned failed command even when apply_root has already added a cause edge. Creation ordering has a deliberate 64-round fallback, not an unrestricted topological-sort guarantee. No percentage-error approximant or performance claim.

### behavior-complement

Subject: world-narr-time-execution, source-bound revision. Domain and observation: the finite typed state/transition family in forward, with dependencies fixed. Operator: A failed second During inequality cannot leave its first inequality in relate's result. Removed middle line event cannot remain in line.main after successful unchain.

Assurance: source-derived partial relation, with finite native evidence where named in checks. Unknown paths remain unknown; no universal coverage or unique inverse is inferred. Complement claims are inner absent-behavior bounds under their stated premises; reverse relations retain all compatible antecedents in their declared family.

### reverse-reconstruction

Subject: world-narr-time-execution, source-bound revision. Domain and observation: the finite typed state/transition family in forward, with dependencies fixed. Operator: One observed order admits many line/placement/cause histories; unchain erases active line participation but retains dead-edge records. Pending cause dedup loses subsequent duplicate line stamps.

Assurance: source-derived partial relation, with finite native evidence where named in checks. Unknown paths remain unknown; no universal coverage or unique inverse is inferred. Complement claims are inner absent-behavior bounds under their stated premises; reverse relations retain all compatible antecedents in their declared family.

### coupling

Subject: world-narr-time-execution, source-bound revision. Domain and observation: the finite typed state/transition family in forward, with dependencies fixed. Operator: relation_endpoint_oracle_and_atomic_pair enumerates interval assignments; unchain_stitches_and_pending_consumes_once exercises actual register/unchain/causal_stamp coupling.

Assurance: source-derived partial relation, with finite native evidence where named in checks. Unknown paths remain unknown; no universal coverage or unique inverse is inferred. Complement claims are inner absent-behavior bounds under their stated premises; reverse relations retain all compatible antecedents in their declared family.