Elamur Groupantsbench-main-extract
The groupant beside tools/bench/src/main.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 |
| cost | partial | invariant-and-cost |
| descriptant | present | descriptant |
| invariant | partial | invariant-and-cost |
| tests | bounded or representation | 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 |
prefix_vs_numeric | prefix_vs_numeric | partial source derived model | prefix_vs_numeric |
lossy_utf8 | lossy_utf8 | partial source derived model | lossy_utf8 |
time_rounding | time_rounding | partial source derived model | time_rounding |
launch_failure | launch_failure | partial source derived model | launch_failure |
Model text
descriptant
bench-main-extract
Epoch 2026-10-31
Prospective inspection identified this relation before additions: Spawn configured command, lossily decode stdout+stderr, first prefix match per pick, lexical number at index or ?, append rounded elapsed.
The production implementation is unchanged; only selected inline tests are appended. Source-bound syntax is generated twice and compared. Native checks exercise bounded helpers; entry orchestration, teacher calls, models and corpora remain source-derived. Partial syntax is not semantic proof. Preserve failure prefixes and ambiguity when refining this model.
approximant
Forward relation
Spawn configured command, lossily decode stdout+stderr, first prefix match per pick, lexical number at index or ?, append rounded elapsed.
Composition
This fragment isolates the stated helper relation; parent composition retains surrounding effects and failures.
catalog
Typed observations: bench-main-extract
Subject: tools/bench/src/main.rs, SHA-256 7a5aff2d66b34bbe237903eefacc2f794692b2b28ca50dfb0595422fd443326e. Domain: bounded source inputs, declared filesystem/environment state and normal allocations. Each view is a partial source-derived relation, not a universal proof. Observation is one helper call or the explicitly described trace. Checks are in tests.md; unexecuted effects remain gaps.
behavior_complement
No matching line excludes a numeric extraction and yields ?. Exit 7 does not exclude successful return.
Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.
reverse_reconstruction
One extracted token constrains only indexed digit/dot run of first matching combined line; surrounding text and all later matches arbitrary.
Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.
prefix_vs_numeric
Prefix itself may contain digits that enter token indexing; extraction never strips prefix before numeric scan.
Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.
lossy_utf8
Invalid stdout/stderr bytes become replacement characters and numeric delimiters; exact bytes cannot be reconstructed.
Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.
time_rounding
Seconds formatted with zero decimals; compatible elapsed intervals round to same output. No stable timing equality is asserted.
Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.
launch_failure
Spawn error returns contextual Err before extraction; successfully spawned failing status still extracts.
Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.
tests
Checks and limits
wave33_tests::synthetic_extraction_preserves_current_lossiness verifies negative/exponent loss, first stdout precedence, missing/out-of-range and nonzero status.
Exact native outcomes and command metadata are retained in the external wave33 cycle receipt bundle. Selected names run twice in debug and release; syntax is independently regenerated twice. Compiled mutations and source restoration receipts distinguish behavior changes from assertion-only controls. These claims are finalized in evidence.md. No live teacher, real model/corpus, benchmark CLI or lesson-learning CLI is run.
invariant-and-cost
Invariant and cost
Status not checked; matching prefix may appear only after indentation trimming, tokens derived from whole untrimmed line.
O(output bytes×picks), child output buffering O(bytes) and subprocess cost external.
No executable percentage surrogate is claimed: effects, categorical acceptance and report text have no justified approximate metric here. Future profiles require a useful metric, zero case, reference and evidence at caps 1/2/5/10%.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/tools/bench/src/main.rs.groupant/extract.groupant/