Module drift 

Oath drift detection — port of drift.ts / Drift.java. A paragraph the committed varar.lock.json baseline recorded as an example that now matches no step. Byte-identical to the other ports (FNV-1a fingerprint, insertion-ordered lockfile serializer, Jaccard word-similarity re-identification).

Structs

BaselineExample

One example-producing paragraph, as recorded in the baseline.

Drifted

A paragraph the baseline says was an example and now matches no step.

LockFile

The whole varar.lock.json: every oath keyed by its POSIX path.

OathBaseline

The committed baseline for one oath file.

Constants

SIMILARITY_THRESHOLD

The word-similarity threshold for re-identifying a moved/reworded example.

Traits

BaselineStore

Persistence port for varar.lock.json. The core owns the format; adapters move only raw text.

Functions

derive_oath_baseline

The full baseline record for an oath: fingerprint plus live examples.

detect_drift

Paragraphs the baseline recorded as examples that now match zero steps.

live_examples

The current example-producing paragraphs, in document order.

message

The human-readable message for a drift.

parse_lock_file

Parses varar.lock.json; None on malformed input (treated as no baseline).

prune_baselines

The whole-lock counterpart of reconcile_drift, run ONCE per run rather than per oath: reconciliation cannot see paths that no longer exist, so without this the lock silently accumulates dead entries and stops being a faithful inventory of the oath set (#70).

prune_lock_file

Drops every baseline whose oath path is not in keep_paths — the entries left behind when an oath is deleted or moved. Pure counterpart of parse_lock_file / stringify_lock_file; the caller decides what “still exists” means.

reconcile_drift

One oath’s baseline reconciliation against a BaselineStore. update accepts all drift; otherwise detect drift and rewrite the baseline only on a clean run.

stringify_lock_file

Serializes varar.lock.json deterministically (fixed field order, sorted oath paths, two-space indent, trailing newline) — NOT [crate::canonical_json].