@buildtovalue/registry

Headless version governance for bpmn-react — the queryable layer over the core lifecycle. Zero runtime dependencies (depends only on @buildtovalue/core).

The core LifecycleEngine governs how a version moves through draft → test → candidate → active → deprecated → retired. This package records the resulting immutable versions and answers the audit questions the lifecycle alone can't:

• "Which version was in effect on day X?" — temporal validity via activeAt(date).
• "What changed between v1 and v2?" — diffBetween(v1, v2) over stored snapshots.
• "What's live on the pilot channel right now?" — publication channels/environments.
• "Which exact version produced this delivery?" — execution pinning (bindRun).

import { VersionRegistry, bindRun } from '@buildtovalue/registry';

const registry = new VersionRegistry({ sink: myDatabaseSink }); // sink optional

// Record a promoted version (snapshot + content hash captured automatically)
await registry.register(diagram, { technicalNotes: 'Reworked the approval gate' });

// Roll out gradually — a version can be active on pilot while another is on general
await registry.publish(diagram.version.id, { channel: 'pilot', status: 'active' });

// Query
registry.activeAt('2026-06-01', { channel: 'pilot' }); // entry in effect then
registry.diffBetween('v1', 'v2');                       // structured diff
registry.lineageOf('v3');                               // ancestor chain, oldest → newest

// Pin an execution to the exact version that produced it
const run = bindRun(registry.get(diagram.version.id)!, { channel: 'pilot' });
// run = { runId, versionId, semanticVersion, snapshotHash, channel, boundAt } — frozen

Guarantees

• Snapshots are content-hashed. register stores a deep copy plus its SHA-256; export/ import round-trip through external storage and import refuses a tampered snapshot.
• Lanes have one live version. Publishing to a lane (channel + optional environment) closes the previous open publication, so activeAt is unambiguous.
• Runs are born pinned. A RunBinding is a frozen value derived from the snapshot hash — promoting or superseding the version later never mutates a run already in flight.

See docs/registry.md for the full guide. License: Apache-2.0.