--- title: "mathlib-fetch — Mova code model" description: "Mova code model of tools/mathlib/src/fetch.rs: components with their labels, obernants and the model text." url: "https://groupants.elamur.ai/free/en/mova/tools/mathlib/src/fetch.rs.groupant/" --- Elamur: [Mova](https://md.mova.elamur.ai/free/en/) · [Dictionary](https://md.dictionary.elamur.ai/free/en/) · [Research](https://md.research.elamur.ai/free/en/) · **Groupants** This page as HTML: # mathlib-fetch The groupant beside tools/mathlib/src/fetch.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 - **kind:** groupant - **status:** partial source bound model - **source:** [`tools/mathlib/src/fetch.rs`](https://github.com/ElamurAI/mova-free/blob/main/tools/mathlib/src/fetch.rs) - **source SHA-256:** `9a892fd61299338f…` - **repository folder:** [`tools/mathlib/src/fetch.rs.groupant`](https://github.com/ElamurAI/mova-free/tree/main/tools/mathlib/src/fetch.rs.groupant) - **repository commit:** `855da7bd4a7b` > **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 | `model.md` | | **ast** | partial | `syntax.json` | | **composition** | partial | [Composition](#composition) | | **cost** | partial | [invariant-and-cost](#invariant-and-cost) | | **descriptant** | present | [descriptant](#descriptant) | | **invariant** | partial | [invariant-and-cost](#invariant-and-cost) | | **tests** | bounded checks | [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](#behavior-complement) | | `reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) | | `resource_admission` | resource_admission | partial source derived model | [resource_admission](#resource-admission) | | `license_admission` | license_admission | partial source derived model | [license_admission](#license-admission) | | `effect_order` | effect_order | partial source derived model | [effect_order](#effect-order) | | `existing_wildcard_selection` | existing_wildcard_selection | partial source derived model | [existing_wildcard_selection](#existing-wildcard-selection) | ## Parts - [mathlib-fetch-archive](https://md.groupants.elamur.ai/free/en/mova/tools/mathlib/src/fetch.rs.groupant/archive.groupant/) - [mathlib-fetch-manifest](https://md.groupants.elamur.ai/free/en/mova/tools/mathlib/src/fetch.rs.groupant/manifest.groupant/) ## Model text ### descriptant #### mathlib-fetch read_list validates columns and rows; run checks free space, then for each row creates slug directory and hashes existing file before STOP/cap. Fresh path checks blocked host, space, robots, bounded download, extension/signature, optional text compaction, then records Done. write_manifest groups Done by sorted slug and writes JSONL then TSV. ##### Epoch 2026-10-31 Prospective model retained before changes. Existing production bytes are preserved; additions are bounded inline tests. Nine source groupants expose ingestion and routing boundaries; typed children bind exact source bytes and reuse their parent syntax projection. Native tests run twice per profile; behavior mutants run as compiled source changes and exact bytes are restored before positive checks. Important retained observation: network-looking helpers are not all pure (DNS inside github_host and books build); selection deliberately excludes those effects. Mixed-format manifest order is not deterministic, and error paths do not imply rollback. No network/DNS/download, real catalog/corpus/model/teacher or database execution. Effect paths are source-derived; finite helper tests are not universal verification. No executable percentage surrogate or speed claim; future caps require metric/domain/reference and remain 1/2/5/10%. ### approximant ## Forward relation read_list validates columns and rows; run checks free space, then for each row creates slug directory and hashes existing file before STOP/cap. Fresh path checks blocked host, space, robots, bounded download, extension/signature, optional text compaction, then records Done. write_manifest groups Done by sorted slug and writes JSONL then TSV. Model observations include returns, retained state and ordered partial effects; on external failures the successful-prefix relation replaces a total-function claim. ### Composition read_list validates columns and rows; run checks free space, then for each row creates slug directory and hashes existing file before STOP/cap. Fresh path checks blocked host, space, robots, bounded download, extension/signature, optional text compaction, then records Done. write_manifest groups Done by sorted slug and writes JSONL then TSV. Scoped children isolate the declared contiguous source intervals. Their operations compose only where the source calls them; costs of overlapping parent/child descriptions are not added twice. Remaining effect paths retain explicit gaps. ### catalog ### behavior_complement Subject: mathlib-fetch, source SHA-256 9a892fd61299338f640f9d8d08471ef7f09cac19235ad80b90d894a12489996d; finite transition observation. Invalid required columns or disallowed license prevent run from reaching free-space or network setup. Unknown response extension and bad signature delete the candidate and do not append Done. These exclusions do not apply to already existing files. Domain: stated source predicates, bounded inputs and available resources; arithmetic assumptions and external effect gaps as in the invariant. Operator is the stated relation/projection; complement is a source-derived inner exclusion, reverse retains compatible antecedents. Other views are source-derived partial constraints, not inverse laws. Evidence: tests.md identifies executed helpers and unexecuted paths. No universal guarantee follows from the finite fixtures. ### reverse_reconstruction Subject: mathlib-fetch, source SHA-256 9a892fd61299338f640f9d8d08471ef7f09cac19235ad80b90d894a12489996d; finite transition observation. Manifest file record admits any Item/Done pair matching retained fields and valid item_idx; original tar contents dropped by compaction are unrecoverable. Hash equality is an observation, not a unique byte inverse. JSON groups preserve per-group order but not original cross-group interleaving. Domain: stated source predicates, bounded inputs and available resources; arithmetic assumptions and external effect gaps as in the invariant. Operator is the stated relation/projection; complement is a source-derived inner exclusion, reverse retains compatible antecedents. Other views are source-derived partial constraints, not inverse laws. Evidence: tests.md identifies executed helpers and unexecuted paths. No universal guarantee follows from the finite fixtures. ### resource_admission Subject: mathlib-fetch, source SHA-256 9a892fd61299338f640f9d8d08471ef7f09cac19235ad80b90d894a12489996d; finite transition observation. Fresh bound=min(file_max,max(max_bytes-total,1)) after total