Elamur Groupantsmlab-main
The groupant beside mlab/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 |
| composition | partial | composition |
| cost | symbolic source derived | invariant |
| descriptant | present | descriptant |
| invariant | partial | invariant |
| tests | executed bounded checks | 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 |
state_invariant | state_invariant | partial source derived model | state_invariant |
failure_precedence | failure_precedence | partial source derived model | failure_precedence |
representation_transport | representation_transport | partial source derived model | representation_transport |
resource_cost | resource_cost | partial source derived model | resource_cost |
Parts
Model text
descriptant
mlab-main
CLI dispatch for code execution, filesystem flags, suite utilities, VM diagnostics and Monte Carlo gateway.
Modeling epoch — 2026-10-31
Prospective source read preceded edits. Bounded synthetic checks and selected existing safe tests exercise actual code; paired debug/release results and compiled negative-control assertions are retained externally. Frozen scenario, corpus, external measurement, full-school and training effects are unexecuted. Partial lexical syntax supplies no macro-expanded or semantic proof.
Cross-review refinement — 2026-10-31
Incompatible nonmemory transfer flags are rejected inside run_code. That excludes backend/import, interpreter and finalization effects; it does not exclude the caller invoking run_code. Runtime behavior is unchanged.
approximant
Forward relation
main selects command; run/-e parse FS options then open/import, instantiate interpreter, execute and finalize exports/journal. Script false yields exit1, configuration/read/finalization error exit2, successful operation exit0. Other branches run explicit suites/bench/mcgate only when selected.
Domain
Valid Rust value/storage invariants and available bounded resources; exact branch and effect observations only.
Executable approximant gap
No useful percentage-error surrogate is established for these categorical, textual or effectful observations. Supported future caps are 1%, 2%, 5%, 10%; no executable approximation or production substitution is claimed.
invariant
Invariants and costs
Default backend is memory. FS export requires successful interpreter status; finalization error overrides script exit code. Journal follows export loop, hence export error can prevent journal.
Failure ordering
Limits parse precedes mem/import compatibility. run reads host source before run_code; test validates imports unsupported before backend validation. Trailing lone options are ignored by windows(2).
Cost
O(argv bytes + script/interpreter work + import/export bytes + journal bytes). VMbench performs six runs per source, mcgate defaults 20000; neither is run for this modeling epoch.
composition
Composition
main selects command; run/-e parse FS options then open/import, instantiate interpreter, execute and finalize exports/journal. Script false yields exit1, configuration/read/finalization error exit2, successful operation exit0. Other branches run explicit suites/bench/mcgate only when selected.
Real:virtual pair splits at first colon; repeated FS/limits/journal select last, repeated import/export accumulate. External suite and timing output are not deterministic timing guarantees.
filesystem-lifecycle
Build FsOpts, open backend and import memory roots, run code, export only if ok, then write journal; return status based on config/finalization versus interpreter.
Boundary: Creation/import precedes interpreter execution; journal is after export attempts and can be absent if export errors.
Interaction limit
Local fragment relations compose only with valid Value storage, caller error propagation and delegated providers. They do not establish whole-interpreter or host-filesystem guarantees.
models
Typed models — mlab-main
Source-derived partial relations; finite checks do not prove universality.
behavior_complement
Failed script excludes configured export effects, but does not exclude journal write or earlier imports. Nonmem with imports/exports is rejected inside run_code by fs_opts, excluding make_fs/import, interpreter execution and finalization, but not run_code invocation. This is CLI policy, not arbitrary filesystem isolation proof.
reverse_reconstruction
Exit2 admits usage, source read, options, backend initialization or finalization errors. Exit0 does not uniquely reconstruct arguments or successful code; last FS flags and first fault flag collapse many argv sequences.
state_invariant
Default backend is memory. FS export requires successful interpreter status; finalization error overrides script exit code. Journal follows export loop, hence export error can prevent journal.
failure_precedence
Limits parse precedes mem/import compatibility. run reads host source before run_code; test validates imports unsupported before backend validation. Trailing lone options are ignored by windows(2).
representation_transport
Real:virtual pair splits at first colon; repeated FS/limits/journal select last, repeated import/export accumulate. External suite and timing output are not deterministic timing guarantees.
resource_cost
O(argv bytes + script/interpreter work + import/export bytes + journal bytes). VMbench performs six runs per source, mcgate defaults 20000; neither is run for this modeling epoch.
tests
Evidence and limitations
Selected named outcomes: cli_import_export_journal, cli_dir_mode_reads_and_writes_inside_root_only. Each ran twice debug and twice release with sorted identical nonempty outcomes and numeric exit 0. Source-specific compiled control exercised "cli_import_export_journal": compile exit 0, assertion-red exit 101, exact-restored rerun exit 0. External receipts: octopus-wave30-io-2026-10-31 (native-commands.json, positive-receipts.json, controls.json).
Scope: Default backend is memory. FS export requires successful interpreter status; finalization error overrides script exit code. Journal follows export loop, hence export error can prevent journal.
AST projection generated twice to fresh files and compared byte-for-byte. Runtime evidence is finite and does not establish every branch, allocation failure, backend implementation or effect path. No optimization or speed claim.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/mlab/src/main.rs.groupant/