docs(adr): ADR-0112 accepted; record the error-code exception in Prime Directive #3

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MaSQn77TT5fUgHK9CesaDK

Author: claude

AGENTS.md

@@ -56,6 +56,7 @@ Other scripts: `objectui:bump` (pull only), `objectui:build`, `objectui:clean`.
 3. **Naming:**
    - TS config keys → `camelCase` (`maxLength`, `defaultValue`)
    - Machine names (data values) → `snake_case` (`name: 'first_name'`)
+   - Error codes → `SCREAMING_SNAKE` (`PERMISSION_DENIED`) — machine constants, not data values; scope and rationale in [ADR-0112](./docs/adr/0112-error-code-vocabulary-and-ledger.md). Not a general license to deviate.
    - Metadata type names → **singular** (`'agent'`, `'view'`, `'flow'`) — matches `MetadataTypeSchema` in `packages/spec/src/kernel/metadata-plugin.zod.ts`
    - REST endpoints → plural (`/api/v1/ai/agents`)
 4. **Imports:** Use `@objectstack/spec` namespaces or subpaths. Never relative `../../packages/spec`.

docs/adr/0112-error-code-vocabulary-and-ledger.md

@@ -1,6 +1,6 @@
 # ADR-0112: One error-code vocabulary — SCREAMING_SNAKE on the wire, a closed standard catalog plus a registered extension ledger
 
-**Status**: Proposed (2026-07-30)
+**Status**: Accepted (2026-07-30)
 **Deciders**: ObjectStack Protocol Architects
 **Builds on**: [ADR-0049](./0049-no-unenforced-security-properties.md) (declare-and-enforce — a declared property nothing enforces is worse than absent), [ADR-0060](./0060-conformance-ledger-platform-pattern.md) (the ledger pattern this ADR reuses for extension codes), [ADR-0078](./0078-no-silently-inert-metadata.md) (no silently inert declarations — a catalog no route validates against is exactly this), [ADR-0089](./0089-unify-visibility-predicate-naming.md) (the naming-unification precedent: one name per concept, enforced)
 **Consumers**: `@objectstack/spec` (`api/errors.zod.ts`, `api/contract.zod.ts`, generated manifests), `@objectstack/client` (re-exports `StandardErrorCode`; `StandardError` interface; the three-location code probe), `@objectstack/runtime` (`http-dispatcher.ts`), `@objectstack/rest` (`rest-server.ts`, import/export routes), `services/*` (storage, i18n, messaging, automation …), `packages/qa/dogfood`, objectui console (`RecordAttachmentsPanel` and every error-code branch), `content/docs/api/error-catalog.mdx`