@objectstack/plugin-hono-server@16.0.0-rc.1

Minor Changes

• bfa3c3f: Broadcast a transactionalBatch capability bit in discovery so clients negotiate the atomic cross-object batch declaratively, instead of runtime-probing 404/405/501 (#3298).

  The atomic cross-object batch endpoint (POST {basePath}/batch, #1604 / ADR-0034 item 4) and its typed SDK surface (client.data.batchTransaction, #3271) already shipped, but discovery never told a client whether a backend actually supports it. Consumers (notably ObjectUI's ObjectStackAdapter) had to probe: fire a /batch, read 404/405 (no route) or 501 (no runtime transaction), and only then fall back to non-atomic client-side simulation. That is "find out by calling", not capability negotiation — it cannot be decided at connect time and cannot serve as the "minimum backend supports /batch" gate that blocks hard-deleting the non-atomic fallback downstream.

  WellKnownCapabilitiesSchema gains a required transactionalBatch: boolean, and every discovery producer fills it honestly (declared === enforced), so it never becomes a declared-but-unpopulated bit:

  • @objectstack/metadata-protocol (getDiscovery) — reports whether the runtime engine can honour a transaction (typeof engine.transaction === 'function'). The /batch handler runs its ops inside engine.transaction(), which degrades to a non-atomic passthrough (or 501) without one.
  • @objectstack/rest (/discovery) — ANDs the engine signal with whether it actually mounts the route (api.enableBatch), so a server with batch disabled reports false even on a transaction-capable engine (never advertise an endpoint that would 404).
  • @objectstack/plugin-hono-server (standalone discovery) — reports false: this minimal surface registers CRUD only and does not mount /batch (that ships with @objectstack/rest). Under-reporting is the safe direction — a client keeps its correct-but-slower fallback rather than losing atomicity.
  • @objectstack/client — already normalizes hierarchical capabilities to flat booleans, so client.capabilities.transactionalBatch is exposed (and now typed) for declarative consumers.

  The bit follows the existing capability semantics: true ⟺ the /batch route is mounted and the runtime can honour a transaction — the exact condition under which the endpoint returns 200 rather than 404/405/501. Additive and behavior-preserving; only the discovery payload gains a field.

• 62a2117: Split the overloaded managedBy: 'system' bucket with an explicit engine-owned value (ADR-0103 addendum, #3343). ADR-0103 deferred the enum split ("revisitable later as a rename") because a new managedBy value would fall through to the fully-editable platform default on deployed Console clients. Both reasons against it are now retired — the server-side write guard / apiMethods reconciliation / /me/permissions clamp make that fallthrough cosmetic (the write is rejected regardless of what the client renders), and objectui#2712 closed the UI union — so v16 lands it, additively.

  • New enum value engine-owned with the same all-locked default affordance row as system (create/import/edit/delete: false, exportCsv: true). It joins ENGINE_OWNED_BUCKETS (the engine write guard) and GUARDED_WRITE_BUCKETS (the /me/permissions clamp); the guard, reconcileManagedApiMethods, and the clamp mechanisms are unchanged — engine-owned is an explicit member of the set they already covered by resolved affordance.
  • 20 objects relabelled system → engine-owned — the ones the engine owns end to end and that declared no write-opening userActions (the metadata store, jobs, approval runtime rows, sharing rows, sys_automation_run, the messaging delivery/receipt pipeline, sys_secret, settings). One-line, behaviour-identical per object.
  • 8 admin/user-writable objects keep managedBy: 'system' (the RBAC link tables, sys_user_preference, sys_approval_delegation, the messaging config grids) — system now reads as "engine-managed schema, writable via userActions".

  Behaviour-, enforcement- and wire-identical: resolved affordances, the guard verdict, the 405 apiMethods reconciliation, and the permissions clamp are the same before and after — this is a self-documenting relabel, not a policy change. No data migration (managedBy is schema metadata) and no code branches on the 'system' literal. Retiring the overloaded system entirely (moving the 8 writable objects to a dedicated bucket) is a breaking rename deferred to v17.

Patch Changes

• Updated dependencies [6289ec3]
• Updated dependencies [8efa395]
• Updated dependencies [bfa3c3f]
• Updated dependencies [62a2117]
• Updated dependencies [06ff734]
  • @objectstack/spec@16.0.0-rc.1
  • @objectstack/core@16.0.0-rc.1
  • @objectstack/observability@16.0.0-rc.1
  • @objectstack/types@16.0.0-rc.1