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

The groupant beside world/src/report.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/report.rs`](https://github.com/ElamurAI/mova-free/blob/main/world/src/report.rs)
- **source SHA-256:** `73053fdec39edc3c…`
- **covers:** Identity sampling, permissive verdict decoding and manual denominators. (bytes 6244–9496)
- **part of:** [world-report](https://md.groupants.elamur.ai/free/en/mova/world/src/report.rs.groupant/)
- **repository folder:** [`world/src/report.rs.groupant/sampling.groupant`](https://github.com/ElamurAI/mova-free/tree/main/world/src/report.rs.groupant/sampling.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 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-report-sampling-behavior-complement` | behavior_complement | partial source model | [behavior-complement](#behavior-complement) |
| `world-report-sampling-reverse-reconstruction` | reverse_reconstruction | partial source model | [reverse-reconstruction](#reverse-reconstruction) |
| `world-report-sampling-sample-budget` | resource_boundary | partial source model | [sample-budget](#sample-budget) |
| `world-report-sampling-manual-join` | constraint_relation | partial source model | [manual-join](#manual-join) |

## Model text


Identity sampling, permissive verdict decoding and manual denominators.

### forward

eval_tale obtains state answer, anchor fallback and baseline then scores; Agg sums supplied r_slm/r_anchor/r_base and separately sums state-source r_slm. report folds rows into fixed attribute order plus ordered maps for explicitness/story/first-space intent. sample ranks eligible identities by salted wrapping FNV/finalizer. read_verdicts skips malformed rows, overwrites duplicate keys; manual_md averages only matched recognized-type rows.

### invariant

For Agg built from add, 0<=answered<=n; zero denominators use max(1). Only source determines answered membership; score fields are trusted and may be inconsistent with source. Manual scores are trusted rather than masked when Src::None. Unknown attributes contribute to all totals but lack a displayed attribute slice.

### cost

N rows and total text bytes L: aggregation O(N log G + L), formatting linear in emitted bytes, sampling scans N once per seven attributes and sorts each slice O(N log N) overall with repeated key allocation. Manual lookup O(N log V), verdict decoding O(L + V log V). eval_tale cost includes external answer/baseline/scoring dependencies; no measured speed claim.

### composition

Sample identities join verdicts on exact story and n. Duplicate sample rows may reuse one verdict and increase denominator; exclusions are identity-based.

### epoch-memory

2026-10-30: first source-bound modeling epoch. Synthetic native fixtures only; no held-out tales, live parsers or annotators. CSV lost a quoted empty final record; a zero-length known section prevented decomposition progress. The repaired scanner retains quoted-field presence and decomposition ignores empty candidates. Report observations preserve existing permissive score/label semantics rather than silently enforcing a new measurement policy. Native finite evidence does not establish unrestricted correctness.

### checks

Run cargo test -p world --lib report::wave9_models -- --test-threads=1. See the root sidecar evidence.md for repeated debug/release checks and compiled controls. Partial syntax excludes macro expansion and type/name resolution. No executable percentage approximant is claimed.

### behavior-complement

Subject: current bound source and this node's scope. Domain and observation: With k=0 no rows are selected; excluded identity cannot be selected; malformed numeric verdict rows cannot replace a previous parsed key. These are inner absent transitions, not evidence of score validity.

Status: source-derived partial relation, supported only where named finite fixtures apply. Assume successful allocations, fixed dependencies and bounded native inputs; external filesystem/answer-generation effects remain unknown. The relation describes one terminating call, not all process traces.

### reverse-reconstruction

Subject: current bound source and this node's scope. Domain and observation: A final verdict map admits arbitrary skipped lines and overwritten earlier rows. Manual percentages admit maps with different comments and omitted identities. A unique prior adjudication cannot be recovered.

Status: source-derived partial relation, supported only where named finite fixtures apply. Assume successful allocations, fixed dependencies and bounded native inputs; external filesystem/answer-generation effects remain unknown. The relation describes one terminating call, not all process traces.

### sample-budget

Subject: current bound source and this node's scope. Domain and observation: Each recognized type contributes min(k,eligible row count); duplicates count as rows. Stable hash ties retain input order and forbid an unconditional permutation-invariance claim.

Status: source-derived partial relation, supported only where named finite fixtures apply. Assume successful allocations, fixed dependencies and bounded native inputs; external filesystem/answer-generation effects remain unknown. The relation describes one terminating call, not all process traces.

### manual-join

Subject: current bound source and this node's scope. Domain and observation: Exact key join, then recognized type filter, then average matched occurrences. Three sample rows with two verdicts give N=2, independently of two state-source rows; the fixture separates both denominators.

Status: source-derived partial relation, supported only where named finite fixtures apply. Assume successful allocations, fixed dependencies and bounded native inputs; external filesystem/answer-generation effects remain unknown. The relation describes one terminating call, not all process traces.