Elamur Groupantsworld-induce-changes
The groupant beside world/src/induce.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 | approximant |
| ast | partial | ../syntax.json |
| composition | partial | composition |
| cost | partial | cost |
| descriptant | present | descriptant |
| invariant | partial | invariant |
| tests | partial bounded parent 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 |
reverse_reconstruction | reverse_reconstruction | partial source derived model | reverse_reconstruction |
world_induce_changes_invariants | world_induce_changes_invariants | partial source derived model | world_induce_changes_invariants |
world_induce_changes_resource_cost | world_induce_changes_resource_cost | partial source derived model | world_induce_changes_resource_cost |
world_induce_changes_representation_join | world_induce_changes_representation_join | partial source derived model | world_induce_changes_representation_join |
world_induce_changes_domain_partition | world_induce_changes_domain_partition | partial source derived model | world_induce_changes_domain_partition |
Model text
descriptant
world-induce-changes
Add r appends iff r absent; Remove r filters all equal; Replace a,b maps every a in place. holds(Add r)=exists broader x covering r; holds(Replace)=old absent OR new present.
Modeling epoch 2026-10-31
Prospective source/branch/cost hypotheses were saved externally before source edits. This partial source-derived model retains observed boundaries rather than claiming complete verification. Pure codes/counting/parsing/changes/threshold tests; feature extraction, persistent effects and live learning remain partial, no surrogate.
approximant
Forward relation
Add r appends iff r absent; Remove r filters all equal; Replace a,b maps every a in place. holds(Add r)=exists broader x covering r; holds(Replace)=old absent OR new present.
Domain: Finite Rule vectors including duplicate/empty atoms; semantic validity caller-owned.
No executable percent surrogate: these categorical/effect observations lack a useful approximation metric. Future supported caps1/2/5/10% need a defined domain/metric and real reference evidence; no error or speed bound is claimed.
invariant
Caller vector immutable, order retained, multiplicity preserved by Replace; equality compares full atom vectors.
Cost component: cost.md.
cost
O(R*A) equality/clones with no I/O/parser effects.
composition
family apply_scoped adds scope preservation; broader holds is redundancy heuristic not inverse of apply.
models
behavior_complement
holds(Add r) true need not imply apply(Add r)=identity: broader unequal rule covers but exact append still occurs. Replace cannot reorder untouched rules.
reverse_reconstruction
Remove fiber Y consists of lists deleting all r to Y. Replace chooses subset of resulting new positions with old antecedents, preserving others. Add output may come from identical already-containing list or prefix before final appended r.
world_induce_changes_invariants
Caller vector immutable, order retained, multiplicity preserved by Replace; equality compares full atom vectors.
world_induce_changes_resource_cost
O(R*A) equality/clones with no I/O/parser effects.
world_induce_changes_representation_join
family apply_scoped adds scope preservation; broader holds is redundancy heuristic not inverse of apply.
world_induce_changes_domain_partition
Finite Rule vectors including duplicate/empty atoms; semantic validity caller-owned.
tests
Scoped evidence
Parent selected test names: ["induce::wave29_worldlearn::counting_requires_correct_heads_and_orders_candidates", "induce::wave29_worldlearn::packed_subsets_and_empty_bootstrap", "induce::wave29_worldlearn::permissive_parse_and_set_valued_changes"]. These finite tests touch only the named behaviors, not every statement in this fragment. See parent evidence. control-induce: compiled source mutation failed with exit101; source restored byte-for-byte and15positive tests passed.
Scope bytes [58143,59518) are bound to the shared parent syntax projection and full source hash. Pure codes/counting/parsing/changes/threshold tests; feature extraction, persistent effects and live learning remain partial, no surrogate.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/world/src/induce.rs.groupant/changes.groupant/