Elamur Groupantsrt-mixed-heb-lookup
The groupant beside tools/roundtrip/src/mixed/heb.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 | symbolic source derived | invariant |
| descriptant | present | descriptant |
| invariant | partial | invariant |
| tests | unexecuted source derived 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 |
count_tie | count_tie | partial source derived model | count_tie |
row_filter | row_filter | partial source derived model | row_filter |
context_backoff | context_backoff | partial source derived model | context_backoff |
unknown_lemma | unknown_lemma | partial source derived model | unknown_lemma |
Model text
descriptant
Descriptant
Prospective epoch
2026-10-31 source review predicted: best chooses maximum count, resolving ties toward lexicographically smaller form; form_of tries full then tag then lemma. Resource model: Count ingestion O(rows log keys * key bytes); winner scan linear in distinct forms; lookup O(log keys * key bytes). External prospective.md predates test additions and preserves APIs, effect order, hazards and interaction hypotheses.
Observed epoch
Bounded real helper checks in tests.md constrain these models; syntax is a partial lexical projection with no macro expansion, name resolution or proof. Production expressions unchanged; six inline test modules added. Compiled mutants are temporary and exactly restored. Existing malformed-input and nonfinite domains remain explicit, not silently repaired. Parent composes this scope with siblings without adding overlapping costs twice.
Lookup counts/context fallback source-reviewed only; no direct native lookup fixture in this slice.
approximant
Forward relation
best chooses maximum count, resolving ties toward lexicographically smaller form; form_of tries full then tag then lemma.
Domain: Scope: Lookup count and fallback. Valid UTF-8; words/forms lengths agree; positive group sizes sum to words; heads are zero or in range; generated scripts use unique valid Take indices. Residual metrics are finite nonnegative estimates, not compressed byte lengths.
invariant
Invariant and cost
Invariant
Scope: Lookup count and fallback. Valid UTF-8; words/forms lengths agree; positive group sizes sum to words; heads are zero or in range; generated scripts use unique valid Take indices. Residual metrics are finite nonnegative estimates, not compressed byte lengths.
Cost
Count ingestion O(rows log keys * key bytes); winner scan linear in distinct forms; lookup O(log keys * key bytes).
Limits
Lookup counts/context fallback source-reviewed only; no direct native lookup fixture in this slice. No percentage surrogate is implemented: categorical parsing/effect observations lack an admitted numerical error metric. Any future profile must define its metric/domain and use only1/2/5/10 percent caps.
models
Typed source-bound relations
Subject: exact source SHA-256 in manifest. Domain and resource premises are in invariant.md. Each model is partial, source-derived, over a single helper invocation or the described finite trace. Complements are proposed inner exclusions under those premises; reverse relations retain all compatible antecedents, with no unique inverse claim. The oracle is the named checks in tests.md; unexecuted cases remain hypotheses. No numerical approximation certificate.
behavior_complement
Within this scoped helper relation, outputs violating the stated forward equation or its preserved fields are excluded under the domain premises; this is a partial source-derived inner exclusion, not a claim about untested panics. lexicographic tie resolution is deterministic.
reverse_reconstruction
Winning form cannot recover count distribution or ignored CoNLL rows.
count_tie
lexicographic tie resolution is deterministic
row_filter
ten columns required, range/decimal IDs and missing lemma skipped
context_backoff
form_in tries previous-lemma context before ordinary fallback
unknown_lemma
underscore lemma returns None even if maps contain a key
tests
Checks and evidence
Named source/helper checks: None (unexecuted scope).
Wave32 on2026-10-31:10 distinct exact tests passed twice debug and twice release, with equal sorted named outcomes. This node claims only its listed subset; empty subset means source review only. Five actual source-behavior mutants compiled, failed assertions, restored exact bytes/hash, and passed focused green reruns. No assertion-only mutants; existing swapped-input controls are separate. Receipt bundle: $MOVA_DATA/runs/octopus-wave32-rt_mixed-2026-10-31 (native-commands.json, source-test-map.json, mutation-results.json, .status/.log). No live corpus, teacher, frozen assessment, download or production data used.
Lookup counts/context fallback source-reviewed only; no direct native lookup fixture in this slice.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/tools/roundtrip/src/mixed/heb.rs.groupant/lookup.groupant/