Module artifact 

Structs

ArtifactMeta

ArtifactSession

ArtifactSessionManager

ArtifactTaskSpec

DocPatch

FsArtifactStore

RuntimeArtifactAdapter

SaveMeta

ValidatedPatch

Enums

ArtifactTaskKind

ArtifactTaskResult

DomainError

PatchConflict

StoreErr

Traits

ArtifactPluginAdapter

ArtifactStore

Functions

apply_doc_patch

Apply validated edits in reverse order to avoid index drift. Allocation: line buffer + replacement line buffers. Complexity: O(L + R + e).

compute_revision

validate_doc_patch

Validate structural patch invariants before any mutation. end_line is exclusive. Allocation: clones only the validated edit list. Complexity: O(e), e = edit count.