README

L2 — the reference Runtime. Implements the Invoker chain, the Policy Engine, the Workflow runtime, and Effect dispatch.

Owned RFC surfaces

• RFC-001 §A-1.4 §8.2.1 — Invoker chain steps 1–5 (Tenant, Policy, Workflow, Effect, Audit).
• RFC-005 §3–§13 — Policy Engine implementation (chain assembly, composition, two-tier cache, failure semantics, side-effect spy).
• RFC-006 — Workflow runtime (state read, guard evaluation, transition validation, state mutation via default Effect).
• RFC-013 — Effect interface dispatch + EffectContext construction.
• Built-in parameterized Policies from RFC-011 §8.3: RoleRequired, PermissionRequired, RolesRequired.
• Built-in default Effects from RFC-011 §8.2: CreateEffect, TransitionEffect (covers Action::create / Action::transition sugar).

Allowed dependencies

• ausus/kernel only.
• illuminate/contracts + illuminate/support (Laravel facades, container — not Eloquent, not HTTP).

Forbidden dependencies

• illuminate/database — Persistence is L3.
• illuminate/http — API Surface is L4.
• Any other AUSUS package.

Public surface

• Ausus\Runtime\RuntimeServiceProvider (Laravel service provider).
• Implementation classes are private; the kernel's contracts are the only public consumption surface.