@decantr/essence-spec

Support status: core-supported
Release channel: stable

Schemas, validation, migration, guard evaluation, and TypeScript types for decantr.essence.json.

Install

npm install @decantr/essence-spec

What It Exports

• validateEssence() for schema validation
• evaluateGuard() for contract/guard checks
• normalizeEssence() for active Essence v4 normalization
• migrateToV4() for the explicit legacy migration path
• Decantr Essence v4 TypeScript types

Example

import { evaluateGuard, validateEssence } from '@decantr/essence-spec';

const result = validateEssence(essence);
if (!result.valid) {
  console.error(result.errors);
}

const violations = evaluateGuard(essence, {});

Schema Exports

• @decantr/essence-spec/schema/essence.v4.json
• @decantr/essence-spec/schema/essence.v2.json and essence.v3.json remain archived references for migration tooling only

Compatibility

@decantr/essence-spec defines the active Essence v4 public contract for Decantr 3. Runtime validation accepts v4 only; older Essence v2/v3 files are supported through decantr migrate --to v4.

• additive schema fields may be introduced in compatible minor releases
• breaking schema or migration behavior changes require a major version
• deprecation and migration guidance should be documented before removing or replacing a supported essence path

Stability Note

This package is the lowest-level public Decantr contract and is intended to remain boring and dependable for downstream consumers.

• patch releases should stay documentation-only or behaviorally compatible
• schema export paths are part of the supported public surface
• coordinated downstream releases should only be needed when a package explicitly adopts a newer essence-spec version

Security And Permissions

@decantr/essence-spec is a local validation library. It may read explicitly supplied essence/schema paths through helper APIs, but it does not write files, call the network, spawn processes, emit telemetry, or upload source. See security permissions.

License

MIT