Module divergence 

Drift detection for preprocessor outputs (the 4-state matrix).

Walks the per-pack baseline cache and compares each cached record against the current source file (in the pack) and the current deployed file (in the datastore). Classifies each pair into one of the four states defined in docs/proposals/preprocessing-pipeline.lex §6.1:

source	deployed	state
same	same	Synced
new	same	InputChanged
same	edited	OutputChanged
new	edited	BothChanged

Plus two special states for missing files: a baseline whose source has been deleted (MissingSource) or whose deployed artifact is gone (MissingDeployed).

This module is read-only. It produces a DivergenceReport per cached baseline; the action layer (commands::transform::check) decides what to do with each report (apply a reverse-merge diff, emit a conflict block, etc).

Structs

DivergenceReport

One row in dodot transform check’s report.

Enums

DivergenceState

Where a single processed file sits in the 4-state matrix.

Functions

classify_one

Classify a single baseline against the current state on disk.

collect_baselines

Walk the per-pack baseline cache directory and load every record.

collect_divergences

Walk every cached baseline and produce a divergence report.

find_baseline_for_source

Look up the baseline whose source_path matches target, plus the (pack, handler, filename) triple that identifies it in the cache layout.