Radium Constrained Execution (RCE): A Runtime Model for Governing Machine Actions

# Radium-Constrained Execution (RCE): A Runtime Model for Governing Machine Actions Radium-Constrained Execution (RCE) is a runtime model for governing machine actions through explicit execution authority. Its central proposition is simple: **an action is executable only if accompanied by a valid mandate evaluated at runtime.** This record presents the public evaluative surface of the RCE primitive. It defines:- the operational boundary of the primitive- the core invariants that must hold- the trust assumptions under which the primitive is meaningful- the public falsifiability conditions under which the primitive would fail- the minimum public evaluation surface through which the primitive may be judged RCE is not presented here as:- a general theory of intelligence- a replacement for IAM, RBAC, policy systems, or formal verification- a turnkey reproduction pack- a disclosure of implementation-specific runtime internals Instead, this publication establishes a bounded and publicly evaluable primitive claim. ## Central primitive claim RCE asserts that machine execution must be bounded by explicit runtime authority. At the point where action would otherwise become real:- if a valid mandate is present, execution may proceed- if it is absent, invalid, expired, replayed, scope-invalid, or otherwise non-conforming, execution must be refused Refusal is therefore not a degraded mode or post-hoc exception.It is a constitutive property of the primitive. ## Public evaluative posture This publication is intentionally structured for:- inspection- challenge- falsifiability-oriented evaluation It is intentionally **not** a public release of:- deployment topology- runnable reproduction materials- replay packs- implementation-specific mandate encoding- proof-generation procedures- operational attack procedures- integration pathways sufficient for turnkey reproduction or reverse engineering **Public evaluability is required. Operational reproducibility is controlled.** ## Included in this record This record may include:- the primary paper- the RCE Companion Note v1 — Public Evaluative Edition- associated public reference materials ## Why this matters Most existing control layers govern identity, permissions, policy, or retrospective auditability. RCE addresses a narrower and more specific question: **under what conditions may a machine action become executable at runtime?** Its contribution is to place explicit, verifiable authority at the execution boundary itself. ## Suggested reading order 1. Primary paper2. RCE Companion Note v1 — Public Evaluative Edition ## Keywords execution governance, runtime authorization, machine action control, fail-closed systems, mandate verification, agentic systems, autonomous systems, admissibility, public falsifiability, runtime boundary Canonical publication:https://radiumdefense.org GitHub repository:https://github.com/RadiumCosm/radium-corpus