purefunctor

Workflow for adding and updating Alexandrite integration-test fixtures for checking, lowering, resolving, and LSP behavior. Use when creating compiler integration tests, reviewing fixture snapshots, or using `just t <category>`.

Workflow for splitting a known compiler bug fix into auditable jj history. Use when the current or parent commit already contains a compiler fix and needs a preceding failing integration-test fixture plus a fix commit that updates the same checking, lowering, resolving, or LSP snapshot.