Elamur Groupantsworld-school-bench-scratch
The groupant beside world/tests/school_bench.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 | model.md |
| tests | bounded checks partial scope | 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 |
cpu | cpu | partial source derived model | cpu |
roots | roots | partial source derived model | roots |
args | args | partial source derived model | args |
failure | failure | partial source derived model | failure |
Model text
descriptant
world-school-bench-scratch
new allocates timestamp temp dir; command constructs CPU world binary with scratch hot/bench/missing.bin paths and two env removals.
Modeling epoch — 2026-10-31
Read full assigned source before editing; prospective predictions retained in external wave29 receipts. This child binds only its stated half-open UTF-8 byte range; other APIs remain parent scope. Evidence is limited to named bounded fixtures; registration is partial modeling. Production behavior unchanged; only inline synthetic tests added to four assigned sources.
approximant
Forward relation
new allocates timestamp temp dir; command constructs CPU world binary with scratch hot/bench/missing.bin paths and two env removals.
Domain and resource limits
Finite valid structures and allocation-success executions under the branch conditions in models.md; integer overflow is outside measured fixtures. Exact categorical relations have no supplied percent surrogate. Macro expansion, arbitrary model quality and external effects are not inferred from syntax.
invariant
Invariant
No args until caller appends; missing model not created.
Cost
One directory operation and fixed path/env allocations.
composition
Composition
This scope contributes scratch to its parent. Its forward, complement and preimage are restricted to the bound byte interval. The parent syntax projection is referenced once through ../syntax.json; no independent semantic AST is claimed.
models
behavior_complement
Exclude model reads or binary launch during construction; other inherited settings can still affect later callers.
reverse_reconstruction
Bench/hot roots constrain common scratch parent; equivalent configuration does not recover timestamp generation history.
cpu
MOVA_EXEC overrides ambient GPU.
roots
bench and hot are separate children.
args
No plan or benchmark arguments initially.
failure
SystemTime/create_dir unwrap; no retry on collision.
tests
Bounded checks
Named checks associated with this source (not every fragment branch):
- wave29_bench_command_isolation_and_cleanup_without_spawn
17 unique named tests in total passed twice debug and twice release; sorted named outcomes equal across all four runs. Four compiled controls cover bAbI identity, StepGame tie ordering, parser-command state removal and bench-command CPU selection; each exits101 at a runtime assertion, exact source restored then positive exit0. Other sources have finite adversarial fixtures but no separately compiled mutant.
CLI integration coverage is command construction and temporary cleanup only; legacy school/model/cadence paths are not executed. No speed benchmark, GPU, live teacher, datasets or held-out replay.
Limits:
- Only command/temp helper executed; no plan/cadence/publication runtime claim
- No corpus/model/full-school; executable percent surrogate unsupported
External receipt root: $MOVA_DATA/runs/octopus-wave29-worldeval-2026-10-31.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/world/tests/school_bench.rs.groupant/scratch.groupant/