Pure code-motion refactor, no logic changes. Follows the repo convention
of one struct/enum + its impl per module file:
- engine/handle.rs: the left-right write/read plumbing (EngineOp,
IndexWriter, IndexReadHandle, IndexReader, EngineHandle) and the actor
loop (spawn/run) that owns EngineSnapshot.
- engine/message.rs: EngineQuery/EngineMessage/EngineResponse.
- engine/snapshot/: EngineSnapshot itself, split by concern into
params.rs (declaration + auto-detect), metrics.rs (declare/apply/
backfill), filter.rs (search-bar filter compilation/eval), sort.rs
(sort-helper indexes), and query.rs (handle_query_inner + PromQL
evaluation), with mod.rs holding the struct and the accessors shared
across all of them.
- engine/tests.rs: the inline test module, kept as one file (per the
task's own escape hatch) since most tests exercise ingest -> declare
-> query across several of the new submodules at once rather than one
in isolation.
Visibility was narrowed per call site: pub(super) where only sibling
snapshot submodules need an item, pub(crate) where engine::handle or
engine::tests (outside the snapshot subtree) also need it.
cargo build --all-targets and cargo test are green (291 passed, 1
ignored, same as before the split).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A1ZJ3SrayzLzVndhVq9BmS
