Authoring History / Undo-Redo Contract (generated)
web_client/spa/src/authoring-history/types.ts, web_client/spa/src/workspace/workbench-surface-contracts.ts, web_client/spa/src/authoring/actionPolicy.ts.The launch-grade undo/redo subsystem. Undo/redo is scoped by the active editable document, descriptor-backed (not closures), durable, and re-submitted through the authoritative Project Graph transaction path. See docs/architecture/authoring-history-undo-redo-contract-final-plan.md.
Descriptor schema version: authoring.history.v2.
Descriptor fields (AuthoringHistoryEntryV1)
| Field | Meaning |
|---|---|
| schemaVersion | versioned descriptor tag (authoring.history.v2) |
| id | stable entry id |
| projectId / actorId | owning project + actor (per-actor undo) |
| scopeKind / scopeKey | document | workspace | project + the canonical scope key |
| surfaceId / resourceKind / resourceId | resolved active surface + resource identity |
| label | human-readable history label |
| forwardOps / inverseOps | graph ops to redo / undo (op-inverse derived) |
| forwardScript / inverseScript | script-IR redo / undo payload (Semantic Patch entries) |
| baseRevision | graph revision the entry's state is valid at |
| baseTargetVersions | targetKey -> the resource version this entry's write produced |
| idempotencyKey | stable key for retry-safe submission |
| createdAt / committedAt / undoneAt / redoneAt | lifecycle timestamps |
| status | lifecycle status enum (below) |
| receipt | { transactionId, revision } when known |
| conflict | { code, message, target } typed conflict when blocked |
Status lifecycle
pending, committed, queued, undo-queued, redo-queued, conflicted, undone, redone, rejected
Typed conflict codes (non-destructive, per-actor + per-scope)
authoring_history_conflict_target_changed, authoring_history_conflict_deleted_target, authoring_history_conflict_revision_gap, authoring_history_conflict_scope_unavailable
Per-surface undo scope
| Surface | undoScope | Scope key format |
|---|---|---|
| design | authoring-history | design:world:<worldId> |
| ui | authoring-history | ui:ui-panel:<panelId> (or ui) |
| script | authoring-history | script:<resourceKind>:<resourceId> |
| workflows | authoring-history | workflows:<resourceKind>:<resourceId> |
| prefab | authoring-history | prefab:<resourceKind>:<resourceId> |
| material-editor | authoring-history | material-editor:<resourceKind>:<resourceId> |
| model-editor | none | model-editor:<resourceKind>:<resourceId> |
| data | none | data:<resourceKind>:<resourceId> |
authoring-history = the canonical scoped kernel. surface-local is allowed only for genuine native/editor text state. none = read-only/non-authoring.
Operations that MUST produce a descriptor (undoPolicy: required)
entity.create, entity.update, entity.delete, component.put, component.patch, component.field.patch, component.delete, prefab.override.mutate, script.semantic_patch.apply, project.graph.transaction.apply