Elamur Groupantsworld-read-segmentation-heading
The groupant beside world/src/read.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
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 |
| ast | partial | ../../syntax.json |
| composition | partial source model | parent-interaction |
| cost | partial source model | cost |
| descriptant | partial source model | epoch-memory |
| invariant | partial source model | invariant |
| tests | partial source model | 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-read-segmentation-heading-behavior-complement | behavior_complement | partial source model | behavior-complement |
world-read-segmentation-heading-reverse-reconstruction | reverse_reconstruction | partial source model | reverse-reconstruction |
world-read-segmentation-heading-parent-interaction | composition_relation | partial source model | parent-interaction |
world-read-segmentation-heading-boundary | constraint_relation | partial source model | boundary |
world-read-segmentation-heading-information | information_projection | partial source model | information |
world-read-segmentation-heading-cost | resource_relation | partial source model | cost |
Model text
Wave34, 2026-10-31. Subject: world-read-segmentation-heading, current source SHA 80ef1f69d776dcb5cd03bf925cc5c01e827d7919495ccda17d785eb3de459857. Domain: one terminating supplied-input helper transition; valid indices, sufficient memory and finite strings/trees/worlds. Source-derived partial relations, not a verified universal theorem. All views below share this domain and exact manifest scope; specialized assumptions are stated locally. No executable percentage approximant is claimed.
forward
For line i, accept iff blank-before and either >=5 alphabetic characters all uppercase with trimmed byte length <70, or >=3 leading spaces, uppercase first character, <=10 whitespace words, no final . , ; :, >=5 alphabetic characters, and a following blank line.
invariant
Accepted centered headings exclude two-space indentation and missing following blanks unless independently accepted by caps; a nonblank previous line excludes both routes.
behavior-complement
Accepted centered headings exclude two-space indentation and missing following blanks unless independently accepted by caps; a nonblank previous line excludes both routes.
reverse-reconstruction
Recover every line/context satisfying the observed Boolean. Accepted uppercase headings do not identify indentation, punctuation or title length below the cap; rejected headings retain all failed-predicate combinations.
parent-interaction
Original indentation is tested before trimming; paragraph normalization cannot be moved ahead of recognition.
boundary
Capital branch counts letters as Unicode characters but length as UTF-8 bytes; these are different thresholds.
information
A line may satisfy both branches; there is one heading transition, not two stories.
cost
Classification scans the line, allocates alphabetic characters and counts words: O(bytes) time and O(letters) temporary space.
checks
Centered heading fixtures plus historical marker/whitespace tests; recognition is not literary-title detection.
Exact selected native boundary: cargo test --offline --locked -p world --lib read::wave34_models::centered_heading_boundaries -- --exact --test-threads=1. Repeated in debug and release; see the current file-level wave34 evidence and external native-receipts.json.
assurance
The behavior-complement is an inner exclusion hypothesis over admissible input/output pairs, derived from branch order; not the complement of an incomplete model of the entire file. Reverse reconstruction is the compatible antecedent relation, retaining every modeled ambiguity rather than a chosen inverse. Parent-interaction is a composition relation, boundary a constraint relation, information an information/state projection, and cost a resource relation. The named checks are finite falsifiers; unexecuted branches remain source-inspected gaps. No parser/model/teacher/corpus/frozen assessment was run.
epoch-memory
New child in wave34; no prior child renamed or counted. Parent historical wave8/wave9 evidence remains historical. Current raw receipts are in the external wave34 reasoning run; source syntax is partial, macros opaque, and no semantic AST or general proof is supplied.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/world/src/read.rs.groupant/segmentation.groupant/heading.groupant/