Elamur Groupantsworld-story-frames
The groupant beside world/src/story.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 | composition |
| 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-story-frames-behavior-complement | behavior_complement | partial source model | behavior-complement |
world-story-frames-reverse-reconstruction | reverse_reconstruction | partial source model | reverse-reconstruction |
world-story-frames-coupling | composition_relation | partial source model | 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
Frame stores narrator/listeners, parent, level, branch/world/line, bounds, open intervals and optional owned world. is_open reads only the final span.
invariant
No span means closed; root has its own distinguished identity. Parent/world consistency is a caller obligation.
cost
is_open O(1); frame clone includes owned World cost.
composition
Frame storage is separate from narr command validation. typed_frames_close_resume_and_world_scope checks open/close/resume via public commands.
checks
Native story::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-story-frames, source-bound revision. Domain and observation: the finite typed state/transition family in forward, with dependencies fixed. Operator: A final closed span cannot be observed as open; name cannot invent a supplied id when id is absent.
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-story-frames, source-bound revision. Domain and observation: the finite typed state/transition family in forward, with dependencies fixed. Operator: An open boolean admits every span sequence with a final None end; earlier spans and narration identity cannot be recovered.
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-story-frames, source-bound revision. Domain and observation: the finite typed state/transition family in forward, with dependencies fixed. Operator: Frame storage is separate from narr command validation. typed_frames_close_resume_and_world_scope checks open/close/resume via public commands.
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.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/world/src/story.rs.groupant/frames.groupant/