Humanoid Operating System (HOS) Technical Specification

Abstract The Humanoid Operating System (HOS) defines a standardized software architecture for governing humanoid robots through constitutional execution, whole-body resource management, capability-based execution authority, and deterministic physical control. Unlike conventional operating systems that manage computational resources such as processors and memory, HOS introduces native operating-system abstractions for humanoid embodiment, including body resources, physical capabilities, validator graphs, release authorization, execution manifests, and real-time constitutional governance. This specification defines the architectural components, runtime interfaces, kernel services, object model, execution model, and conformance requirements for HOS-compliant humanoid systems. The specification is intended to promote interoperability across humanoid hardware, software, and AI models while supporting safety, governance, extensibility, and future standardization.

Copyright © 2026 TrustRobotics. All Rights Reserved. 

This document defines the proposed architecture of the Humanoid Operating System (HOS). This publication does not grant any patent license,copyright license, trademark license, or other intellectual property rights except where explicitly stated. Certain technologies described herein may be the subject of pending or issued patent applications.  

HOS Publication Roadmap

Document	Version	Status
HOS Technical Specification	0.1	Proposed Standard
RFC-HC Constitution	0.1	Draft
HOS Kernel	0.1	Planned
HObject Runtime	0.1	Planned
Humanoid APIs	0.1	Planned
Inference	0.1	Planned
Trust Architecture	0.1	Planned
Conformance Test Suite	1.0	Planned
Reference Implementation	Preview	Planned
Developer Guide	Preview	Planned

  The HOS Manifesto

Humanoid robots represent a fundamental transition in computing. For the first time, artificial intelligence is no longer confined to digital environments. It will increasingly perceive, reason, move, manipulate objects, interact with people, and change the physical world. Traditional operating systems were designed to manage computational resources such as processors, memory, storage, and networks. They were never intended to govern autonomous machines capable of walking through homes, assisting patients, operating in factories, collaborating with people, or making physical decisions with real-world consequences.

As humanoid robots become general-purpose computing platforms, they require a new class of operating system.

The Humanoid Operating System (HOS) is founded on a simple principle:

Artificial intelligence should generate intentions. The operating system should govern physical execution.

HOS separates reasoning from authority. Artificial intelligence may propose a physical action. The operating system determines whether that action may be executed. This separation transforms physical execution from an implicit consequence of software into an explicit operating-system responsibility. Within HOS, the humanoid body is treated as a managed operating-system resource. Hands, feet, balance, locomotion, manipulation, gaze, contact, energy, thermal capacity, and physical authority become first-class system resources subject to scheduling, allocation, synchronization, monitoring, and constitutional governance. Physical execution is therefore elevated from application behavior to operating-system behavior.

HOS is founded upon Constitutional Computing. Every proposed physical action is evaluated before execution. Every execution is attributable. Every execution is auditable. Every execution occurs within explicit authority. Safety is one constitutional concern. Equally important are ownership, custody, trust, permissions, mission scope, human interaction, organizational policy, regulatory requirements, and responsible operation in the physical world. HOS intentionally remains independent of any particular artificial intelligence model, robot manufacturer, processor architecture, middleware framework, or programming language. The architecture defined by HOS is intended to outlive today's AI models. As reasoning systems evolve, Constitutional Computing remains. As humanoid hardware evolves, Whole-Body Resource Management remains. As software evolves, deterministic physical governance remains. The objective of HOS is not merely to provide another robotics framework. Its objective is to establish a common execution architecture for humanoid computing. An architecture that allows independent developers, researchers, manufacturers, enterprises, and governments to build interoperable humanoid systems upon a common operating-system foundation. An architecture that encourages innovation while preserving trust. An architecture in which physical authority is explicit rather than assumed. An architecture that recognizes that autonomous machines operating among humans require fundamentally different operating-system responsibilities than computers operating on desktops or servers.

The Humanoid Operating System is proposed as that foundation. This specification represents the initial public definition of that architecture. It is intended to evolve through implementation experience, technical collaboration, and community participation while preserving the architectural principles established herein. The future of humanoid robotics will not be defined solely by increasingly capable artificial intelligence. It will also be defined by the operating systems that determine how intelligence becomes trustworthy physical action.

That is the purpose of HOS.  

Document Status Status of This Document This document defines Version 0.1 of the TrustRobotics Humanoid Operating System (HOS) Technical Specification. Document Status: Proposed Standard This specification establishes the initial architectural definition of the Humanoid Operating System. Version 0.1 defines the foundational architecture, terminology, runtime model, constitutional execution framework, kernel responsibilities, runtime objects, inference interfaces, programming interfaces, trust architecture, and conformance model. Version 0.1 intentionally focuses on architecture rather than implementation. Implementations are expected to evolve as humanoid robotics technology matures while preserving the architectural principles established herein. Future revisions may introduce additional APIs, runtime services, object definitions, protocol specifications, serialization formats, reference implementations, and conformance tests while maintaining compatibility with the architectural model defined by this document. This specification is published to encourage discussion, experimentation, interoperability, and industry collaboration.

 Intended Audience This specification is intended for: humanoid robot manufacturers operating-system developers robotics researchers artificial intelligence researchers semiconductor vendors safety engineers standards organizations software developers universities government agencies enterprise adopters

 Version Roadmap

Version	Status	Description
0.1	Proposed Standard	Initial architecture and object model
0.5	Draft Standard	Stable APIs and runtime behavior
1.0	Standard	Production-ready specification suitable for certification
2.x	Future	Extended distributed, fleet, and ecosystem capabilities

 Change Policy Minor revisions may clarify language without changing architectural behavior. Major revisions shall increment the major version number whenever normative architectural behavior changes. Backward compatibility should be preserved whenever practical.

 Intellectual Property This specification defines an architectural standard. Publication of this specification does not grant any license to patents, patent applications, trademarks, copyrights, trade secrets, or other intellectual property except as expressly provided by TrustRobotics. Certain implementations of the architectural concepts described herein may be protected by pending or issued patents. Implementers are responsible for determining whether any patent licenses or other intellectual property rights are required for particular implementations.

 Feedback Comments, proposed revisions, implementation reports, and interoperability feedback are encouraged. Future revisions of this specification may incorporate community feedback while preserving the architectural principles of HOS.

 Appendices

 Appendix A — Glossary This appendix defines common HOS terminology. Actuator Firewall The software and/or hardware execution boundary that verifies Release Tokens and Safety Envelopes before physical execution. Candidate Humanoid Action Token (CHAT) A structured representation of a proposed physical action generated by the Humanoid-Native Inference Layer. Capability An abstract physical behavior such as Walk, Reach, Grasp, Lift, Carry, Speak, Observe, or Touch. Capability Token A runtime object representing authorization to perform a capability class. Constitution The highest execution authority governing physical execution. Execution Manifest A runtime object describing an approved physical action. HObject A Humanoid Runtime Object managed by HOS. Release Token A runtime authorization permitting execution of a specific physical action. Safety Envelope A runtime description of allowable physical execution constraints.

 Appendix B — HObject Summary Standard HObjects include: Robot Object Mission Object Capability Object Candidate Action Object (CHAT) Constitution Object Validator Object Human Object Tool Object World Object Trust Object Capability Token Release Token Safety Envelope Execution Manifest Audit Object Future HOS versions may define additional HObjects.

 Appendix C — Standard Runtime Services Standard runtime services include: Locomotion Balance Manipulation Vision Speech Hearing Human Interaction Mission Management World Modeling Resource Management Execution Monitoring Audit

 Appendix D — Standard Capability Registry Example capability identifiers include: Walk Run Stand Sit Reach Grasp Lift Carry Look Observe Speak Listen Touch Navigate FollowHuman UseTool Charge Dock Capability identifiers remain extensible.

 Appendix E — Standard Validator Registry Example validator identifiers include: Balance Validator Collision Validator Force Validator Tactile Validator Human-Proximity Validator Workspace Validator Tool Validator Mission Validator Ownership Validator Custody Validator Trust Validator Regulatory Validator Environmental Validator

 Appendix F — Standard Interrupt Registry Example physical interrupts include: Fall Interrupt Slip Interrupt Collision Interrupt Grip Loss Interrupt Human-Proximity Interrupt Battery Interrupt Thermal Interrupt Joint Limit Interrupt Communication Interrupt Constitutional Interrupt

 Appendix G — Boot Sequence Summary The conceptual HOS initialization sequence is: Firmware

↓

Secure Boot

↓

Hardware Discovery

↓

Embodiment Discovery

↓

Kernel Initialization

↓

Runtime Services

↓

Constitution Load

↓

Validator Graph

↓

Capability Registry

↓

Release Token Authority

↓

Actuator Firewall

↓

Operational

 Appendix H — Layered Architecture Applications

↓

Humanoid SDK

↓

Runtime Services

↓

Humanoid-Native Inference Layer

↓

Constitution Runtime

↓

Whole-Body Resource Manager

↓

Humanoid Kernel

↓

Actuator Firewall

↓

Hardware Drivers

↓

Humanoid Hardware

 Appendix I — Related Specifications Companion specifications include: Humanoid Constitution Specification (RFC-H) Humanoid SDK Specification Humanoid Kernel Specification HObject Runtime Specification Humanoid API Specification Release Token Specification Capability Registry Specification Validator Graph Specification Actuator Firewall Specification Humanoid Trust Architecture HOS Conformance Test Suite HOS Reference Implementation

 Appendix J — Revision History

Version	Date	Summary
0.1	July 2026	Initial publication of the Humanoid Operating System Technical Specification establishing the HOS architecture, Constitutional Computing model, kernel architecture, HObject runtime model, inference interfaces, APIs, boot process, trust architecture, and conformance framework.

 Table of Contents Part I — Introduction Scope  Motivation  Design Goals  Terminology  Architecture Overview  Part II — HOS Architecture Layered Architecture  Humanoid Kernel  Constitutional Runtime  Runtime Services  Device Drivers  Part III — Constitutional Computing Constitution  Validator Graph  Capability Registry  Release Tokens  Execution Manifest  Safety Envelope  Part IV — Humanoid Kernel Whole-Body Scheduler  Physical Interrupt Manager  Resource Manager  Morphology Manager  Capability Manager  Part V — Runtime Objects Runtime Object Model  Mission Object  Capability Object  Validator Object  Human Object  Tool Object  Trust Object  Embodiment Object  Part VI — Inference Candidate Action Tokens  Humanoid-Native Inference Layer  Edge and Cloud Execution  Future Inference Extensions  Part VII — APIs Application APIs  Constitutional APIs  Runtime APIs  Driver APIs  Part VIII — Boot Process Constitutional Boot Sequence  Runtime Initialization  Validator Initialization  Capability Registration  Part IX — Security Identity  Authentication  Ownership  Custody  Audit  Part X — Conformance Required Components  Required Interfaces  Certification Levels  Version Compatibility  Appendices A. Object Definitions B. API Reference C. Example Runtime D. Future RFCs

 List of Figures Figure 1. Overall Humanoid Operating System (HOS) Layered Architecture Figure 2. Constitutional Computing Execution Pipeline Figure 3. Whole-Body Resource Manager Figure 4. Humanoid Kernel Architecture Figure 5. HObject Runtime Hierarchy Figure 6. Humanoid-Native Inference Layer Figure 7. Humanoid Programming Interface (HAPI) Figure 8. Constitutional Boot Process Figure 9. Trust Architecture Figure 10. HOS Conformance Model Figure 11. Future HOS Standards Ecosystem

Part I — Introduction 1. Scope The Humanoid Operating System (HOS) defines a standardized software architecture for humanoid robots. HOS provides a common execution environment that governs perception, reasoning, planning, constitutional execution, whole-body resource management, and physical actuation. Unlike traditional operating systems that manage computational resources such as processors, memory, storage, and network interfaces, HOS manages physical embodiment. The operating system treats the humanoid body itself as a collection of managed operating-system resources whose use is coordinated through deterministic runtime services and constitutional execution. The purpose of this specification is to define the architectural interfaces, runtime abstractions, execution semantics, object model, and operating principles of HOS. This document intentionally specifies architecture rather than implementation. This specification does not mandate a particular processor architecture, programming language, artificial intelligence model, robot manufacturer, middleware framework, or operating system kernel implementation. Rather, this specification establishes a common architectural framework that permits interoperability among HOS-compliant humanoid systems.

 2. Motivation Humanoid robots differ fundamentally from conventional computing systems. A traditional operating system manages digital resources. A humanoid operating system manages physical resources. Modern humanoid robots must simultaneously perform tasks including: walking balancing reaching grasping carrying speaking listening observing humans avoiding collisions interacting socially complying with safety policies These operations occur concurrently while sharing common physical resources. Unlike traditional software processes, physical actions cannot simply be rolled back after execution. Every physical movement consumes energy, changes environmental state, and may affect nearby humans or objects. Accordingly, physical execution requires deterministic governance beyond conventional process scheduling. HOS introduces a constitution-native operating system architecture that governs physical execution before actuator commands are released.

 3. Design Goals The primary design goals of HOS are: 3.1 Constitutional Execution Every physical action shall be evaluated against constitutional constraints before execution. 3.2 Whole-Body Coordination All body regions shall operate as coordinated operating-system resources rather than isolated controllers. 3.3 Vendor Independence The architecture shall support heterogeneous humanoid hardware. 3.4 AI Independence The architecture shall operate independently of any specific AI model. Vision-language-action models, reinforcement learning policies, diffusion policies, symbolic planners, world models, future reasoning systems, and other inference engines may all utilize HOS. 3.5 Deterministic Physical Execution Physical execution shall occur through deterministic runtime services regardless of probabilistic AI outputs. 3.6 Extensibility New capabilities shall be added without redesigning the operating system. 3.7 Security Physical authority shall be governed through explicit authorization rather than implicit software access. 3.8 Observability Every physical action shall be attributable, auditable, and reproducible.

 4. Non-Goals HOS is not intended to define: a robot programming language a robot simulator a machine-learning framework a hardware reference design a communication protocol a single constitutional policy a specific AI architecture These components may interoperate with HOS but remain outside the scope of this specification.

 5. Architectural Philosophy HOS adopts five architectural principles. Principle 1 — Physical Execution is Privileged Physical execution is fundamentally different from digital execution. Digital software may fail safely. Physical software may injure people or damage property. Accordingly, physical execution requires additional operating-system services.

 Principle 2 — Candidate Actions are not Motor Commands Artificial intelligence systems generate candidate actions. Candidate actions are proposals. They are not executable motor commands. Candidate actions become executable only after operating-system validation.

 Principle 3 — Constitution before Execution Every candidate action passes through constitutional evaluation. The Constitution determines whether execution authority exists. Safety represents only one constitutional consideration. Additional constitutional considerations include ownership, custody, permissions, mission scope, trust, insurance, jurisdiction, human interaction, and organizational policy.

 Principle 4 — The Body is an Operating-System Resource Traditional operating systems manage: CPUs Memory Storage Networks HOS manages: hands arms legs feet torso neck gaze balance tactile systems power thermal capacity contact authority These resources are allocated, scheduled, and monitored by the operating system.

 Principle 5 — Separation of Intelligence from Authority Artificial intelligence determines what it wishes to do. The operating system determines whether physical execution is authorized. This separation allows future AI systems to improve independently while preserving deterministic governance.

 6. Layered Architecture HOS is organized into layered services. Applications

↓

Humanoid SDK

↓

Humanoid Runtime Services

↓

Constitution Runtime

↓

Humanoid Kernel

↓

Actuator Firewall

↓

Hardware Drivers

↓

Physical Hardware Each layer provides well-defined interfaces while preventing higher layers from bypassing constitutional execution.

 7. Relationship to Existing Operating Systems HOS complements rather than replaces conventional operating systems. Conventional operating systems continue to provide: virtual memory process scheduling file systems networking hardware abstraction HOS extends these services by introducing humanoid-specific execution semantics. Accordingly, HOS may execute: alongside Linux alongside Windows alongside QNX alongside VxWorks within a hypervisor within middleware as a microkernel as an independent operating system The architecture described herein remains independent of the underlying implementation.

 8. Relationship to Artificial Intelligence HOS intentionally separates inference from execution. Artificial intelligence systems generate candidate physical actions. The operating system evaluates those candidate actions prior to execution. Consequently, HOS remains compatible with present and future inference architectures, including transformer-based models, vision-language-action models, reinforcement-learning policies, diffusion policies, graph neural networks, neurosymbolic systems, world models, state-space models, and other reasoning architectures. Future humanoid-specific inference techniques—including edge inference, distributed inference, stateful branching, branch-resumable execution, execution-state transfer, cloud-assisted reasoning, and additional inference mechanisms—may be integrated into the HOS inference layer without modifying the constitutional execution model defined by this specification.

 9. Intended Audience This specification is intended for: humanoid robot manufacturers operating-system developers AI researchers robotics researchers semiconductor companies systems architects safety engineers standards organizations software developers academic researchers

 10. Document Organization This specification is organized as follows: Part I — Introduction Part II — Architecture Part III — Constitutional Computing Part IV — Kernel Part V — Runtime Objects Part VI — Inference Part VII — APIs Part VIII — Boot Process Part IX — Security Part X — Conformance Appendices Each subsequent part builds upon the architectural principles established in Part I.  ┌───────────────────────────────────────────────────────────────────────────────┐ │                                   APPLICATIONS                                               │ │----------------------------------------------------------------------------------------------│ │ Household Apps │ Industrial Apps │ Healthcare │ Logistics │ Security │ Teleoperation │ AI    │ └───────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                                HUMANOID SDK / APIs                                           │ │----------------------------------------------------------------------------------------------│ │ Walk │ Reach │ Grasp │ Lift │ Carry │ Look │ Speak │ RequestCapability │ RequestValidator    │ └───────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                            HUMANOID RUNTIME SERVICES                                          │ │----------------------------------------------------------------------------------------------│ │ Locomotion │ Balance │ Manipulation │ Gaze │ Speech │ Vision │ Human Interaction │ Mission   │ └───────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                          HUMANOID-NATIVE INFERENCE LAYER                                     │ │----------------------------------------------------------------------------------------------│ │ VLA │ Foundation Models │ RL │ World Models │ Diffusion │ Edge │ Cloud │ Future Extensions   │ │                                                                                              │ │ Output: Candidate Humanoid Action Tokens (CHATs)                                             │ └───────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ════════════════  AI → PHYSICAL TRUST BOUNDARY  ═════════════════                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                             CONSTITUTION RUNTIME                                              │ │----------------------------------------------------------------------------------------------│ │ Constitution │ Policy Engine │ Validator Graph │ Capability Authorization │ Exception Handler │ │----------------------------------------------------------------------------------------------│ │ Outputs: Capability Tokens │ Release Tokens │ Safety Envelope │ Execution Manifest            │ └───────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                          WHOLE-BODY RESOURCE MANAGER                                          │ │----------------------------------------------------------------------------------------------│ │ Embodiment Model │ Morphology │ Capability Registry │ Resource Allocation │ Arbitration       │ │----------------------------------------------------------------------------------------------│ │ Balance │ COM │ Torque │ Power │ Thermal │ Contact │ Workspace │ Body Authority              │ └────────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                                HUMANOID KERNEL                                                │ │----------------------------------------------------------------------------------------------│ │ Scheduler │ Interrupt Manager │ Runtime Objects │ IPC │ Timing │ Memory │ State Manager       │ └───────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                                ACTUATOR FIREWALL                                              │ │----------------------------------------------------------------------------------------------│ │ Release Token Verification │ Safety Envelope Enforcement │ Execution Authorization            │ └───────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                             HARDWARE ABSTRACTION LAYER                                        │ │----------------------------------------------------------------------------------------------│ │ Hand Drivers │ Foot Drivers │ Arm Drivers │ Neck Drivers │ Vision │ Audio │ Tactile Drivers   │ └───────────────────────────────────────────────────────────────────────────────┘                                               │                                               ▼ ┌───────────────────────────────────────────────────────────────────────────────┐ │                                HUMANOID HARDWARE                                              │ │----------------------------------------------------------------------------------------------│ │ Hands │ Arms │ Legs │ Feet │ Torso │ Neck │ Eyes │ Ears │ Tactile Skin │ Motors │ Sensors    │ └───────────────────────────────────────────────────────────────────────────────┘  Related Specifications The Humanoid Operating System (HOS) Technical Specification serves as the architectural foundation of the TrustRobotics standards ecosystem. The following companion specifications define individual components of the HOS architecture.

Document	Description	Status
RFC-HC-0001	Humanoid Constitution	Draft
RFC-HAT-0001	Humanoid Action Token	Planned
RFC-HOBJ-0001	HObject Runtime Model	Planned
RFC-HAPI-0001	Humanoid Programming Interface	Planned
RFC-HK-0001	Humanoid Kernel	Planned
RFC-HRT-0001	Humanoid Runtime Services	Planned
RFC-HVF-0001	Validator Graph	Planned
RFC-HRTK-0001	Release Token Architecture	Planned
RFC-HTA-0001	Humanoid Trust Architecture	Planned
RFC-HBOOT-0001	Constitutional Boot Process	Planned

Throughout this document, references such as "RFC-HC-0001" refer to companion specifications that further define individual architectural components of HOS.

 1.1 Normative Language The key words "MUST," "SHALL," "SHOULD," "RECOMMENDED," "MAY," and "OPTIONAL" in this specification are to be interpreted as described below. These terms distinguish mandatory architectural requirements from recommended implementation guidance and optional extensions. MUST and SHALL indicate an absolute requirement of an HOS-conformant implementation. An implementation claiming compliance with this specification shall satisfy all statements identified as MUST or SHALL. SHOULD indicates a recommended architectural practice. There may exist valid reasons to deviate from a SHOULD requirement in particular implementations; however, the implications of such deviation should be carefully evaluated. RECOMMENDED indicates that a particular design, implementation technique, or operational behavior is considered beneficial for interoperability, robustness, safety, performance, extensibility, or future compatibility, although equivalent alternatives may exist. MAY indicates an optional capability, feature, implementation technique, or extension. Implementations are not required to support every optional feature described in this specification. OPTIONAL indicates functionality that may be implemented at the discretion of a vendor, developer, or system integrator without affecting basic conformance to this specification unless otherwise specified. Unless explicitly stated otherwise, requirements expressed using normative language apply to the architectural behavior of HOS rather than to any particular software implementation, hardware architecture, programming language, operating system kernel, middleware framework, robot manufacturer, or artificial intelligence model. This specification defines an architectural standard. Conformance may be achieved through hardware, firmware, software, middleware, virtualization, distributed execution, cloud services, edge execution, or combinations thereof, provided that the externally observable architectural behavior conforms to the requirements defined herein.  Part II — HOS Architecture 2.1 Overview The Humanoid Operating System (HOS) provides a layered execution architecture for humanoid robots. Unlike conventional operating systems that primarily manage computational resources, HOS manages embodied physical resources while coordinating deterministic execution between artificial intelligence systems and the physical world. The architecture separates reasoning from execution, allowing artificial intelligence systems to propose candidate actions while the operating system determines whether, when, and how those actions may be physically executed. The HOS architecture is organized into cooperating layers that expose stable interfaces while isolating implementation details. Each layer provides services to higher layers while consuming services from lower layers. This layered approach enables hardware independence, software portability, extensibility, and constitutional governance across heterogeneous humanoid platforms.

 2.2 Architectural Principles The HOS architecture is based upon the following principles: Separation of inference from physical execution Constitution-native execution Whole-body resource management Deterministic actuator authority Hardware independence Runtime extensibility Multi-rate execution Observable and auditable execution Vendor-neutral interfaces

 2.3 High-Level Architecture A conformant HOS implementation logically consists of the following layers. Applications

↓

Humanoid SDK

↓

Humanoid Runtime Services

↓

Humanoid-Native Inference Layer

↓

Constitution Runtime

↓

Whole-Body Resource Manager

↓

Humanoid Kernel

↓

Actuator Firewall

↓

Hardware Drivers

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Humanoid Hardware Each layer shall expose well-defined interfaces and shall not bypass constitutional execution.

 2.4 Applications Applications represent the highest software layer. Applications may include: manipulation tasks navigation tasks industrial workflows household assistants healthcare assistants security applications logistics applications entertainment teleoperation developer applications Applications do not directly command motors. Instead, applications request capabilities from HOS. Examples include: Walk Reach Grasp Lift Carry Speak Observe Touch Follow Human Inspect Object The operating system determines whether those requests are executable.

 2.5 Humanoid SDK The Humanoid SDK provides standardized programming interfaces. The SDK abstracts hardware differences and exposes portable APIs for developers. The SDK should remain stable across operating system revisions. Example APIs include: Walk()

Reach()

Grasp()

Carry()

LookAt()

RequestCapability()

RequestReleaseToken()

RequestValidator() Future SDK revisions may introduce additional humanoid capabilities without changing kernel architecture.

 2.6 Humanoid Runtime Services Runtime Services implement reusable operating-system functionality. Typical services include: locomotion balance manipulation gaze perception speech hearing tactile processing mission execution tool management human interaction world model integration Runtime services coordinate multiple kernel resources while remaining independent from specific hardware implementations.

 2.7 Humanoid-Native Inference Layer The Humanoid-Native Inference Layer provides the interface between artificial intelligence reasoning and constitutional execution. The inference layer receives sensory information, mission state, historical context, user requests, and environmental information to generate one or more candidate humanoid actions. The inference layer may utilize: Vision-Language-Action models Robot Foundation Models Reinforcement Learning Diffusion Policies Symbolic Planning World Models Future AI architectures The operating system intentionally treats these models as interchangeable. The inference layer produces candidate actions rather than executable motor commands. Future versions of HOS may define standardized interfaces for: stateful inference branching edge/cloud inference distributed inference execution-state migration branch-resumable inference multi-agent reasoning world-model synchronization These future techniques extend the inference layer without modifying constitutional execution.

 2.8 Constitution Runtime The Constitution Runtime governs physical execution. The Constitution Runtime performs: policy evaluation validator selection capability authorization release-token generation exception handling execution auditing Every candidate action enters the Constitution Runtime before execution. No higher layer may bypass constitutional evaluation.

 2.9 Whole-Body Resource Manager The Whole-Body Resource Manager treats the humanoid body as operating-system resources. Managed resources include: joints limbs hands feet torso neck gaze balance tactile bandwidth actuator authority energy thermal capacity The Resource Manager coordinates simultaneous access among competing runtime services.

 2.10 Humanoid Kernel The Humanoid Kernel coordinates deterministic physical execution. Kernel responsibilities include: scheduling resource arbitration interrupt handling synchronization capability allocation execution timing state management The kernel remains independent from specific AI models.

 2.11 Actuator Firewall The Actuator Firewall represents the final software authority before physical execution. Every actuator command shall pass through the Actuator Firewall. The firewall verifies: Release Token Capability Token Validator Output Safety Envelope Mission Authority Execution Manifest Commands failing verification shall not execute.

 2.12 Hardware Drivers Hardware Drivers translate generic HOS interfaces into hardware-specific operations. Drivers may support: motors servo controllers force sensors tactile arrays cameras microphones inertial sensors grippers feet hands neck mechanisms Drivers shall not independently authorize execution.

 2.13 Humanoid Hardware The hardware layer includes the physical robot. Typical components include: sensors actuators processors memory embedded controllers communication buses batteries cooling systems safety electronics HOS intentionally abstracts hardware implementation details.

 2.14 Layer Interactions Information generally flows downward through the architecture. Applications

↓

Capability Request

↓

Inference

↓

Constitution Runtime

↓

Resource Manager

↓

Kernel

↓

Actuator Firewall

↓

Hardware Execution feedback flows upward. Hardware

↑

Sensors

↑

Kernel

↑

Runtime Services

↑

Inference

↑

Applications This bidirectional architecture allows HOS to continuously evaluate execution while maintaining deterministic authority over physical actions.

 2.15 Architectural Extensibility The HOS architecture is intentionally modular. Future specifications may define additional layers or extensions including: Constitutional Compiler Runtime Object Manager Humanoid Hypervisor Distributed Kernel Fleet Runtime Digital Twin Runtime Developer Toolchain Humanoid App Store Certification Services Such extensions shall preserve the layered architecture defined in this specification.

 Part III — Constitutional Computing 3.1 Overview Constitutional Computing is the foundational execution-governance model of the Humanoid Operating System (HOS). Unlike conventional operating systems that determine whether software processes possess sufficient operating-system permissions to execute, Constitutional Computing determines whether a proposed physical action is authorized for execution in the physical world. Accordingly, HOS distinguishes between computational authority and physical authority. Computational authority determines whether software may execute within the operating system. Physical authority determines whether a humanoid robot may physically alter the real world. Constitutional Computing establishes this second layer of authority.

 3.2 Constitutional Execution Model Every proposed physical action shall pass through constitutional evaluation before actuator execution. The execution model is illustrated conceptually below. AI Model

↓

Candidate Action

↓

Constitution Runtime

↓

Validator Graph

↓

Capability Authorization

↓

Release Token

↓

Execution Manifest

↓

Actuator Firewall

↓

Physical Execution No actuator command shall bypass constitutional evaluation.

 3.3 Constitution The Constitution represents the highest governing authority within HOS. The Constitution defines machine-readable rules governing physical execution. Unlike conventional software policy engines that primarily regulate software permissions, the Constitution regulates interactions between a humanoid robot and the physical world. A Constitution may govern: safety ownership custody mission scope organizational policy human interaction regulatory compliance insurance environmental restrictions geographic restrictions execution authority validator selection capability restrictions The Constitution does not execute actions. The Constitution governs execution.

 3.4 Constitutional Layers A Constitution may consist of multiple cooperating policy layers. Example layers include: National Regulations

↓

Regional Regulations

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Organization Policies

↓

Facility Policies

↓

Mission Policies

↓

Robot Policies

↓

User Policies

↓

Application Policies Policy precedence shall be implementation defined.

 3.5 Constitutional Runtime The Constitution Runtime evaluates every candidate physical action. Responsibilities include: loading constitutions compiling constitutions selecting validators evaluating policy generating capability authorizations generating release tokens generating execution manifests handling constitutional exceptions The Constitution Runtime shall remain independent from any specific AI architecture.

 3.6 Constitutional Objects The Constitution Runtime manages constitutional objects. Typical objects include: Constitution Object Policy Object Validator Object Capability Object Release Token Exception Token Safety Envelope Execution Manifest Mission Object Trust Object Each object has a defined lifecycle managed by HOS.

 3.7 Candidate Actions Artificial intelligence systems do not generate executable motor commands. Instead, they generate Candidate Actions. A Candidate Action represents an intent. Examples include: Walk to Kitchen Reach Shelf Lift Box Shake Hand Pick Up Tool Open Door Follow Human The Candidate Action remains non-executable until constitutional approval.

 3.8 Validator Graph Rather than applying a single safety check, HOS evaluates Candidate Actions using a Validator Graph. The Validator Graph dynamically selects validators appropriate for the requested capability. Example validators include: Collision Validator Balance Validator Force Validator Tactile Validator Human-Proximity Validator Workspace Validator Tool Validator Mission Validator Ownership Validator Custody Validator Insurance Validator Regulatory Validator Environmental Validator Trust Validator Validator selection may depend upon: requested capability environment object type human presence mission constitutional policy

 3.9 Capability Authorization Following successful validation, HOS authorizes capabilities. Capabilities represent classes of physical behavior. Example capabilities include: Walk Run Stand Sit Reach Grasp Lift Carry Speak Listen Observe Human Contact Tool Use Navigation Capabilities remain independent from hardware implementation.

 3.10 Capability Tokens Capability authorization may be represented through Capability Tokens. Capability Tokens indicate that a capability has been approved for execution. Capability Tokens may include: capability identifier body region mission identifier expiration time constraints priority trust level Capability Tokens authorize classes of behavior rather than individual motor commands.

 3.11 Release Tokens Release Tokens authorize specific physical execution. Unlike Capability Tokens, Release Tokens are associated with a particular Candidate Action. A Release Token may contain: action identifier execution window actuator identifiers validator outputs execution constraints safety envelope expiration revocation conditions audit identifier The Release Token represents execution authority.

 3.12 Safety Envelope The Safety Envelope defines allowable physical execution. Example parameters include: maximum force maximum torque joint limits speed acceleration workspace duration balance margin contact regions human proximity The Safety Envelope accompanies the Release Token.

 3.13 Execution Manifest Following constitutional approval, HOS generates an Execution Manifest. The Execution Manifest describes how execution shall occur. Example contents include: Candidate Action Capability Release Token Safety Envelope Runtime Services Allocated Resources Validator Outputs Audit Metadata The Execution Manifest becomes the executable description of the approved action.

 3.14 Constitutional Exceptions Not every Candidate Action succeeds. The Constitution Runtime may generate Constitutional Exceptions. Examples include: permission denied human proximity violation balance violation workspace violation ownership violation insurance violation mission violation custody violation validator disagreement Exceptions may trigger: replanning delayed execution human approval degraded capability alternate validator selection mission modification

 3.15 Constitutional Audit Every constitutional decision should be observable. Typical audit records include: Candidate Action Constitution Version Validator Graph Validator Outputs Capability Token Release Token Execution Manifest Execution Result Exception History Audit records support: debugging certification safety investigations regulatory compliance continuous improvement

 3.16 Constitutional Lifecycle The constitutional execution lifecycle is illustrated conceptually below. Candidate Action

↓

Load Constitution

↓

Build Validator Graph

↓

Execute Validators

↓

Capability Authorization

↓

Generate Release Token

↓

Generate Safety Envelope

↓

Generate Execution Manifest

↓

Actuator Firewall

↓

Physical Execution

↓

Audit

 3.17 Constitutional Independence The constitutional architecture is intentionally independent of: robot manufacturer operating system kernel processor architecture AI model programming language communication protocol The Constitution governs physical authority rather than software implementation.

 3.18 Future Constitutional Extensions Future HOS specifications may define additional constitutional services including: Constitution Compiler Constitutional Marketplace Constitutional Package Manager Constitutional Version Control Constitutional Synchronization Fleet Constitutions Household Constitutions Workplace Constitutions Medical Constitutions Military Constitutions Jurisdiction Modules Dynamic Constitutional Updates These extensions remain compatible with the Constitutional Computing model defined by this specification.

Part IV — Humanoid Kernel 4.1 Overview The Humanoid Kernel is the deterministic execution core of the Humanoid Operating System (HOS). The kernel provides real-time management of physical execution after constitutional authorization has occurred. Whereas the Constitution Runtime determines whether a physical action is authorized, the kernel determines how authorized actions are executed. Accordingly, the kernel is responsible for transforming constitutionally approved physical actions into coordinated whole-body execution. Unlike conventional operating-system kernels that primarily schedule software processes, the Humanoid Kernel schedules physical resources.

 4.2 Kernel Responsibilities The Humanoid Kernel provides the following core responsibilities: Whole-body scheduling Physical resource arbitration Runtime object management Interrupt handling Time synchronization Capability allocation State management Deterministic execution Inter-process coordination Actuator synchronization The kernel intentionally remains independent from any specific artificial intelligence model.

 4.3 Kernel Architecture Conceptually, the kernel consists of cooperating subsystems. Humanoid Kernel

├── Scheduler

├── Runtime Object Manager

├── Physical Interrupt Manager

├── Resource Manager

├── Capability Manager

├── Time Manager

├── Synchronization Manager

├── IPC Manager

├── State Manager

└── Driver Manager

 4.4 Whole-Body Scheduler Traditional operating systems schedule processor time. HOS schedules body resources. The Whole-Body Scheduler coordinates simultaneous execution across: locomotion balance manipulation gaze speech tactile sensing posture human interaction Rather than treating each subsystem independently, the scheduler considers interactions between body regions. Example: A robot carrying a fragile object while walking may require: reduced arm acceleration modified gait increased balance margin gaze stabilization The scheduler coordinates all such changes as one execution decision.

 4.5 Multi-Rate Scheduling Different humanoid functions execute at different frequencies. Example execution rates include:

Service	Typical Rate
Mission Planning	1–10 Hz
Speech	10–50 Hz
Vision	30–120 Hz
Manipulation	100–500 Hz
Balance	500–1000 Hz
Motor Control	1000 Hz
Reflex	1000–5000 Hz

The kernel synchronizes these execution domains while maintaining deterministic physical behavior.

 4.6 Runtime Object Manager The kernel maintains Runtime Objects representing physical execution state. Unlike traditional operating systems, these objects represent embodied entities rather than software resources. Examples include: Mission Object Capability Object Embodiment Object Validator Object Human Object Tool Object Trust Object Safety Envelope Execution Manifest Release Token The Runtime Object Manager controls lifecycle, synchronization, ownership, and access to these objects.

 4.7 Resource Manager The Resource Manager allocates physical resources. Resources include: joints actuators torque power thermal budget balance margin support contacts tactile bandwidth gaze authority workspace Unlike processor scheduling, multiple software services may compete for the same body region. The Resource Manager arbitrates such conflicts.

 4.8 Capability Manager The Capability Manager maintains executable capabilities. Example capabilities include: Walk Stand Reach Grasp Lift Carry Sit Turn Speak Observe Touch Human Tool Use Capabilities may be dynamically enabled or disabled according to constitutional policy.

 4.9 Physical Interrupt Manager Unlike traditional computing systems, humanoid robots receive interrupts originating from the physical world. Example interrupt classes include: Fall Interrupt Slip Interrupt Collision Interrupt Human-Proximity Interrupt Excessive Force Interrupt Grip Loss Interrupt Joint Limit Interrupt Thermal Interrupt Battery Interrupt Communication Interrupt Custody Interrupt Constitutional Interrupt Interrupt priority shall be implementation dependent. Safety-critical interrupts should preempt lower-priority execution.

 4.10 State Manager The State Manager maintains current execution state. Examples include: body pose gait state contact state balance state mission state capability state validator state execution state exception state State updates occur continuously throughout execution.

 4.11 Time Manager The Time Manager synchronizes execution across heterogeneous timing domains. Responsibilities include: clock synchronization timestamp generation sensor synchronization actuator synchronization distributed timing execution deadlines Time consistency is essential for coordinated physical behavior.

 4.12 Synchronization Manager The Synchronization Manager coordinates simultaneous execution among multiple body regions. Examples include: synchronized walking bilateral arm motion gaze stabilization coordinated lifting handoff operations locomotion during manipulation Synchronization may span multiple processors.

 4.13 Inter-Process Communication Traditional operating systems exchange data. HOS additionally exchanges execution authority. Messages exchanged between kernel components may include: Runtime Objects Release Tokens Capability Tokens Validator Outputs Safety Envelopes Execution Manifests Exception Objects Consequently, HOS IPC transports both information and authority.

 4.14 Driver Manager The Driver Manager abstracts hardware. Drivers may include: Hand Driver Foot Driver Neck Driver Vision Driver Audio Driver Tactile Driver Force Driver Drivers remain hardware-specific while exposing standardized HOS interfaces.

 4.15 Execution Pipeline Kernel execution follows the conceptual pipeline below. Execution Manifest

↓

Resource Allocation

↓

Scheduler

↓

Synchronization

↓

Driver Translation

↓

Actuator Firewall

↓

Hardware

 4.16 Kernel Determinism The Humanoid Kernel shall produce deterministic physical execution from constitutionally approved actions. Artificial intelligence may remain probabilistic. Physical execution shall remain deterministic within the constraints defined by constitutional policy and the execution manifest.

 4.17 Kernel Independence The Humanoid Kernel does not require: Linux Windows QNX ROS ROS2 The kernel may execute: above another operating system beside another operating system within middleware within a hypervisor as a microkernel as a standalone operating system This specification defines architectural behavior rather than implementation.

 4.18 Future Kernel Extensions Future HOS specifications may define additional kernel services including: Distributed Kernel Fleet Kernel Constitutional Hypervisor Digital Twin Kernel Predictive Scheduler Adaptive Resource Manager Neuromorphic Scheduler Whole-Body Motion Compiler Kernel Verification Services These extensions remain compatible with the Humanoid Kernel architecture defined by this specification.  Part V — HObject Runtime Model 5.1 Overview The Humanoid Operating System (HOS) represents all significant execution entities as HObjects (Humanoid Objects). An HObject is the fundamental runtime abstraction of HOS. Traditional operating systems manage software objects such as processes, files, sockets, memory pages, and threads. HOS manages embodied runtime objects that represent physical authority, capabilities, humans, tools, missions, and execution state. All HObjects possess a standardized lifecycle, identity, ownership, state, metadata, permissions, and execution interfaces. Every major subsystem of HOS communicates through HObjects.

 5.2 Design Principles Every HObject shall satisfy the following properties: globally identifiable lifecycle managed type-safe serializable auditable synchronizable extensible versionable Implementations may extend HObjects while preserving compatibility with this specification.

 5.3 HObject Hierarchy The standard HOS object hierarchy includes: HObject

├── Mission Object

├── Capability Object

├── Candidate Action Object

├── Validator Object

├── Constitution Object

├── Human Object

├── Robot Object

├── Tool Object

├── World Object

├── Trust Object

├── Release Token

├── Capability Token

├── Safety Envelope

├── Execution Manifest

└── Audit Object Future specifications may define additional HObjects.

 5.4 Common HObject Fields Every HObject should contain common metadata. Example fields include: Object ID

Object Type

Creation Time

Owner

Version

State

Trust Level

Security Label

Expiration

Metadata Additional implementation-specific metadata may be included.

 5.5 Mission Object The Mission Object represents an operational objective. Examples include: Deliver Package Clean Floor Follow Human Inspect Equipment Assist Patient A Mission Object may contain: mission identifier priority owner destination constraints completion criteria timeout dependencies

 5.6 Capability Object The Capability Object represents an abstract physical ability. Example capabilities include: Walk Balance Reach Lift Carry Observe Speak Listen Manipulate Tool Capabilities are independent of specific hardware.

 5.7 Candidate Action Object A Candidate Action Object represents a proposed physical behavior generated by artificial intelligence. Examples include: Walk to Door Pick Up Cup Shake Hand Turn Head Lift Box Candidate Action Objects remain non-executable until constitutional approval.

 5.8 Constitution Object The Constitution Object contains governing rules. The Constitution Object may include: constitutional policies validator policies permissions ownership custody mission constraints human interaction rules insurance policies environmental restrictions The Constitution Object governs execution.

 5.9 Validator Object Validator Objects evaluate Candidate Actions. Examples include: Balance Validator Force Validator Collision Validator Human Validator Workspace Validator Tool Validator Ownership Validator Trust Validator Validator Objects return structured evaluation results.

 5.10 Human Object The Human Object represents a human interacting with the robot. Example fields include: identity location proximity permissions role interaction history safety state communication state The Human Object allows HOS to reason about people independently from sensors.

 5.11 Robot Object The Robot Object represents the executing humanoid. Example information includes: morphology hardware configuration firmware capabilities battery thermal state network state execution state

 5.12 Tool Object The Tool Object represents manipulable equipment. Examples include: hammer screwdriver vacuum scalpel tray cart Tool Objects contain: attachment state permissions geometry operating constraints safety limits

 5.13 World Object The World Object represents the external environment. Examples include: rooms furniture doors elevators terrain stairs obstacles charging stations World Objects evolve continuously as perception updates arrive.

 5.14 Trust Object Trust Objects represent execution confidence. Trust may be associated with: AI models sensors tools humans robots software missions Trust levels may influence validator selection.

 5.15 Capability Token Capability Tokens authorize capability classes. Examples include: Walk Authorization Lift Authorization Human Contact Authorization Tool Authorization Capability Tokens are generated after constitutional evaluation.

 5.16 Release Token Release Tokens authorize specific execution. Unlike Capability Tokens, Release Tokens apply to one Candidate Action. Release Tokens may include: action identifier expiration validator outputs safety envelope audit identifier The Release Token becomes the execution authority presented to the Actuator Firewall.

 5.17 Safety Envelope Safety Envelopes define execution limits. Example parameters include: maximum force maximum torque workspace duration joint limits balance margin contact limits The Safety Envelope accompanies every Release Token.

 5.18 Execution Manifest The Execution Manifest represents the final executable description of a physical action. The manifest may include: Candidate Action Capability Validator Outputs Safety Envelope Release Token Runtime Services Body Resources Scheduling Information The kernel consumes the Execution Manifest.

 5.19 Audit Object Audit Objects record execution history. Typical contents include: Candidate Action Constitution Version Validators Release Token Execution Result Exception History Telemetry Audit Objects support certification and forensic analysis.

 5.20 HObject Lifecycle Every HObject progresses through a managed lifecycle. Create

↓

Initialize

↓

Validate

↓

Authorize

↓

Execute

↓

Update

↓

Archive

↓

Destroy Different HObject types may omit or extend lifecycle stages.

 5.21 Object Relationships HObjects reference one another. Example: Mission Object

↓

Candidate Action

↓

Capability Object

↓

Validator Objects

↓

Release Token

↓

Execution Manifest

↓

Audit Object This graph forms the execution lineage for every physical action.

 5.22 Serialization HObjects shall support standardized serialization. Serialization enables: distributed execution edge/cloud transfer persistence checkpointing simulation debugging replay Serialization format remains implementation dependent.

 5.23 Versioning Every HObject shall contain version information. Versioning enables: backward compatibility software updates fleet interoperability digital twins simulation replay

 5.24 Future HObjects Future HOS specifications may introduce additional standardized HObjects including: Digital Twin Object Fleet Object Organization Object Building Object Zone Object Charging Object Insurance Object Jurisdiction Object Memory Object Skill Object Workflow Object AI Agent Object World Model Object These future HObjects remain compatible with the HObject runtime architecture defined by this specification.  Part VI — Inference 6.1 Overview The Humanoid-Native Inference Layer is the reasoning interface of the Humanoid Operating System (HOS). The inference layer receives sensory input, mission state, world state, human interaction state, and application requests, and generates candidate humanoid actions for constitutional evaluation. Inference does not directly control actuators. Inference produces proposals. HOS determines whether those proposals become authorized physical execution.

 6.2 Inference Boundary The inference layer is positioned above the Constitution Runtime. Humanoid-Native Inference Layer

↓

Candidate Humanoid Action Token

↓

Constitution Runtime

↓

Validator Graph

↓

Release Token

↓

Actuator Firewall

↓

Physical Execution This boundary separates intelligence from physical authority.

 6.3 Model Independence HOS does not require a specific AI model. The inference layer may include: Vision-Language-Action models Robot foundation models reinforcement-learning policies diffusion policies symbolic planners world models graph neural networks state-space models neurosymbolic systems teleoperation interpreters future humanoid reasoning systems A conformant HOS implementation may support one or more of these inference systems.

 6.4 Candidate Humanoid Action Token A Candidate Humanoid Action Token, abbreviated CHAT, represents an inference-generated proposal for physical execution. A CHAT is not a motor command. A CHAT may describe: intended capability target object body regions destination motion class expected contact human interaction tool use mission context confidence score inferred risk Example CHATs include: Walk to kitchen Reach toward cup Grasp handle Lift package Look at human Step backward Hand object to user A CHAT becomes executable only after constitutional approval.

 6.5 CHAT Structure A CHAT should include structured fields. Example fields include: chat_id source_model mission_id capability_request target_object target_location body_region_request expected_contact_state human_interaction_state tool_state confidence risk_estimate timestamp context_reference Implementations may extend this structure.

 6.6 Inference Inputs The inference layer may receive inputs from: sensors world model mission manager applications user commands teleoperation systems runtime services human interaction services fleet systems cloud services digital twins The inference layer may fuse such inputs into one or more candidate actions.

 6.7 Inference Outputs The inference layer outputs one or more CHATs. The inference layer may output: a single candidate action multiple ranked candidate actions branch candidates staged action sequences fallback candidates clarification requests no-action recommendations Multiple CHATs may be evaluated independently or as a branch set.

 6.8 Branching Inference Humanoid tasks often require multiple possible execution paths. The inference layer may maintain multiple candidate branches. Example: Branch A: Pick up object with right hand

Branch B: Pick up object with left hand

Branch C: Ask human to move object

Branch D: Wait and re-evaluate Branching allows the Constitution Runtime and Validator Graph to compare candidate physical futures before execution.

 6.9 Stateful Inference The inference layer may preserve inference state across time. State may include: conversation context mission history sensor history world-model state prior CHATs branch state tool-use state human-interaction state learned preferences Stateful inference enables continuity during long-running humanoid missions.

 6.10 Edge Inference A humanoid robot may execute inference locally. Edge inference may be used for: low-latency balance manipulation tactile processing privacy-sensitive tasks offline operation safety-critical perception reflex-adjacent reasoning Edge inference should be preferred when latency or privacy requirements make remote inference unsuitable.

 6.11 Cloud Inference A humanoid robot may utilize remote inference resources. Cloud inference may be used for: long-horizon planning large model reasoning fleet learning simulation complex language interaction high-capacity world-model evaluation multi-robot coordination Cloud inference shall not bypass constitutional execution on the humanoid robot.

 6.12 Edge-Cloud Routing The inference layer may route inference work between edge and cloud resources. Routing may consider: latency bandwidth privacy safety power thermal state model availability mission criticality human proximity constitutional policy network reliability Routing decisions may occur before inference, during inference, or after branch generation.

 6.13 Branch Promotion and Demotion A candidate inference branch may be promoted from edge to cloud or demoted from cloud to edge. Promotion may occur when: local confidence is insufficient task complexity exceeds onboard capacity remote verification is required additional world knowledge is needed policy requires remote supervision Demotion may occur when: network quality degrades latency becomes critical privacy constraints apply safety-critical execution requires local control remote resources are unavailable

 6.14 Mid-Execution Inference Updates The inference layer may update candidate actions during a mission. Updates may occur in response to: new sensor data human movement object movement slip detection balance change mission change validator feedback constitutional exception operator input Updated inference output shall be treated as a new CHAT or revised CHAT requiring constitutional evaluation.

 6.15 World-Model Integration The inference layer may rely on one or more world models. World models may represent: objects humans terrain rooms doors tools contact states predicted future states affordances hazards constraints World-model outputs may inform CHAT generation and validator selection.

 6.16 Teleoperation Interpreters HOS may support human teleoperation. Teleoperation inputs may include: joystick commands VR commands AR gestures voice commands gaze commands motion capture haptic commands Teleoperation commands are treated as candidate actions and remain subject to constitutional evaluation. A human operator does not automatically bypass HOS authority.

 6.17 Agentic Inference The inference layer may support agentic systems that decompose missions into subtasks. Agentic inference may generate: plans subgoals tool-use requests movement requests manipulation requests communication requests clarification requests Each physical subtask shall be represented as one or more CHATs before execution.

 6.18 Inference Confidence Inference systems may provide confidence estimates. Confidence may influence: validator selection branch ranking remote verification human confirmation execution speed safety envelope size fallback behavior Low confidence should increase validation burden.

 6.19 Inference Risk Inference systems may estimate risk. Risk may include: collision risk balance risk grip risk social risk human-contact risk tool-use risk mission risk property-damage risk Risk estimates may be consumed by the Constitution Runtime.

 6.20 Inference Audit Inference decisions should be auditable. Inference audit records may include: source model model version prompt or sensor context reference generated CHAT confidence risk estimate branch set selected branch validator result final execution outcome Audit records support debugging, certification, incident review, and model improvement.

 6.21 Inference Safety Inference systems may be probabilistic. Physical execution shall remain governed by deterministic HOS authority. Accordingly: inference may propose constitution may authorize kernel may schedule actuator firewall may enforce No inference engine shall directly command physical actuators in a conformant HOS implementation.

 6.22 Future Inference Extensions Future HOS specifications may define: CHAT serialization humanoid branch-state format edge-cloud inference protocol inference-state transfer humanoid KV-cache state transfer world-model synchronization branch-resumable humanoid inference multi-agent humanoid reasoning inference audit schema humanoid inference conformance tests These extensions shall preserve the separation between inference and execution defined by this specification.

 Part VII — Humanoid APIs 7.1 Overview The Humanoid Application Programming Interface (HAPI) defines the standardized programming interface between software applications and the Humanoid Operating System (HOS). Applications shall interact with HOS through standardized APIs rather than directly controlling actuators. The APIs defined herein are logical interfaces. This specification defines semantics rather than programming language syntax. Implementations may expose these APIs through C++, Rust, Python, Java, Go, JavaScript, ROS, gRPC, REST, IPC, middleware, or future software interfaces.

 7.2 API Design Principles The HOS API follows five principles. Capability-Oriented Applications request capabilities rather than motor movement. Constitution-Aware All API requests remain subject to constitutional evaluation. Hardware Independent Applications remain independent from robot hardware. Object-Oriented API operations manipulate HObjects. Deterministic Execution API requests do not directly execute actuators.

 7.3 API Categories The standard HOS API consists of: Capability APIs Runtime APIs Constitution APIs Mission APIs Human APIs Tool APIs World APIs Resource APIs Audit APIs System APIs

 7.4 Capability APIs Capability APIs request physical capabilities. Example functions include: Walk()

Run()

Stand()

Sit()

Reach()

Grasp()

Lift()

Carry()

Observe()

Speak()

Listen()

LookAt()

Touch()

UseTool()

Navigate()

FollowHuman() Capability APIs generate Candidate Humanoid Action Tokens (CHATs). Capability APIs do not directly move motors.

 7.5 Capability Parameters Capability requests may include parameters. Example: Walk

Destination

Maximum Speed

Preferred Route

Arrival Time

Priority

Safety Preference Example: Lift

Object

Target Height

Maximum Force

Grip Preference

Destination Parameter definitions remain implementation dependent.

 7.6 Constitution APIs Constitution APIs expose constitutional services. Examples include: RequestCapability()

EvaluateCapability()

RequestReleaseToken()

EvaluatePolicy()

GetValidatorGraph()

GetSafetyEnvelope()

GetExecutionManifest() Applications should never generate Release Tokens directly.

 7.7 Runtime APIs Runtime APIs expose operating-system services. Examples include: GetMission()

PauseMission()

ResumeMission()

CancelMission()

GetRobotState()

GetExecutionState()

GetCapabilityState()

GetBalanceState() Runtime APIs provide observation rather than direct control.

 7.8 Mission APIs Mission APIs manipulate Mission Objects. Example functions include: CreateMission()

LoadMission()

StartMission()

PauseMission()

ResumeMission()

AbortMission()

GetMissionStatus() Mission APIs coordinate long-running behavior.

 7.9 Human APIs Human APIs expose Human Objects. Examples include: GetNearbyHumans()

TrackHuman()

IdentifyHuman()

RequestInteraction()

RequestConversation()

RequestPermission()

RequestConfirmation() Human APIs do not bypass constitutional policy.

 7.10 Tool APIs Tool APIs expose Tool Objects. Examples include: AttachTool()

DetachTool()

InspectTool()

ValidateTool()

UseTool()

ReleaseTool() Tool operations remain constitutionally governed.

 7.11 World APIs World APIs expose environmental information. Examples include: GetWorldState()

FindObject()

FindDoor()

FindChargingStation()

FindWorkspace()

QueryOccupancy()

QueryHazards() World APIs provide semantic information rather than raw sensor streams.

 7.12 Resource APIs Applications may query operating-system resources. Examples include: GetAvailableCapabilities()

GetResourceUsage()

GetPowerBudget()

GetThermalState()

GetBodyAvailability()

ReserveResource() Applications cannot reserve resources permanently.

 7.13 Audit APIs Audit APIs provide execution transparency. Examples include: GetAuditLog()

GetExecutionHistory()

GetValidatorHistory()

GetMissionHistory()

ExportAudit() Audit records remain read-only.

 7.14 Event APIs Applications may subscribe to operating-system events. Examples include: MissionStarted

MissionCompleted

CapabilityGranted

CapabilityDenied

HumanDetected

ToolAttached

EmergencyStop

SlipDetected

FallDetected

LowBattery The event mechanism remains implementation dependent.

 7.15 Notification APIs Applications may receive asynchronous notifications. Notifications include: validator completion mission updates constitutional exceptions resource availability execution completion hardware faults

 7.16 Exception APIs Applications may receive structured exception objects. Examples include: CapabilityDenied

ReleaseTokenExpired

ValidatorFailure

BalanceFailure

HumanTooClose

ToolUnavailable

MissionConflict Exceptions provide explanation without exposing implementation details.

 7.17 Asynchronous Execution Most HOS APIs are asynchronous. Example lifecycle: Application

↓

Capability Request

↓

CHAT

↓

Constitution

↓

Release Token

↓

Execution

↓

Completion Callback Applications shall not assume immediate execution.

 7.18 Streaming APIs Some runtime information may be streamed. Examples include: pose balance vision world updates execution state mission state Streaming interfaces remain implementation dependent.

 7.19 HObject APIs Every HObject supports common operations. Examples include: Create()

Destroy()

Serialize()

Deserialize()

Clone()

Validate()

Authorize()

Archive() Future HObjects inherit these operations.

 7.20 Driver APIs Hardware drivers expose standardized interfaces. Examples include: ReadSensor()

WriteActuator()

ResetDevice()

GetHealth()

GetDiagnostics() Applications shall not call Driver APIs directly. Driver APIs are intended for Runtime Services and Kernel components.

 7.21 Extension APIs Vendors may define additional APIs. Vendor extensions should: preserve HOS semantics preserve constitutional execution preserve object compatibility Vendor APIs should avoid modifying standard HObject behavior.

 7.22 API Versioning Every HOS API shall include version information. Example: HAPI 1.0

HAPI 1.1

HAPI 2.0 Backward compatibility should be maintained whenever practical.

 7.23 Future APIs Future HOS specifications may define additional APIs including: Humanoid SDK APIs Fleet APIs Digital Twin APIs Simulation APIs Constitutional Marketplace APIs Humanoid App Store APIs Multi-Robot APIs Cloud Synchronization APIs Distributed Runtime APIs Humanoid Inference APIs These APIs shall remain compatible with the architectural principles defined by this specification.

 7.24 API Philosophy Applications do not command motors. Applications request capabilities. The operating system determines: whether execution is permitted, which body resources are allocated, which validators execute, whether Release Tokens are issued, and how execution occurs. This separation of software intent from physical authority is the defining characteristic of the HOS programming model and distinguishes HOS from conventional robot middleware and traditional operating-system APIs.

 Part VIII — Constitutional Boot Process 8.1 Overview The Constitutional Boot Process defines the initialization sequence of a Humanoid Operating System (HOS). Unlike conventional operating systems, HOS performs both computational initialization and constitutional initialization before enabling physical execution. During the boot process, HOS discovers hardware resources, initializes runtime services, loads constitutional authority, constructs validator graphs, registers capabilities, and establishes execution governance. No physical actuator shall be enabled until the Constitutional Boot Process successfully completes.

 8.2 Design Goals The Constitutional Boot Process is designed to: establish trusted execution initialize the humanoid body verify constitutional authority construct runtime services synchronize embodiment initialize execution governance enable deterministic physical execution

 8.3 Boot Sequence A conformant HOS implementation conceptually performs the following sequence. Firmware

↓

Secure Boot

↓

Hardware Discovery

↓

Embodiment Discovery

↓

Kernel Initialization

↓

Runtime Services

↓

Constitution Load

↓

Validator Graph Construction

↓

Capability Registry

↓

Mission Initialization

↓

Release Token Authority

↓

Actuator Firewall

↓

Applications Enabled The order shown is conceptual. Equivalent implementations are permitted provided constitutional authority is established before physical execution.

 8.4 Firmware Firmware initializes hardware. Typical firmware responsibilities include: processor initialization memory initialization communication buses clocks secure storage embedded controllers Firmware does not authorize physical execution.

 8.5 Secure Boot Secure Boot verifies trusted software. Verification may include: bootloader kernel runtime constitutional packages validator packages security certificates Implementations may use cryptographic verification.

 8.6 Hardware Discovery HOS discovers available hardware. Examples include: processors GPUs NPUs motors cameras tactile arrays microphones batteries communication devices Hardware capabilities become available to higher layers through standardized drivers.

 8.7 Embodiment Discovery Unlike traditional operating systems, HOS discovers a physical body. Embodiment Discovery identifies: limbs joints hands feet torso neck sensors actuators tool interfaces The embodiment model represents the physical structure of the robot.

 8.8 Kernel Initialization The Humanoid Kernel initializes: scheduler interrupt manager resource manager synchronization manager runtime object manager timing manager Kernel initialization shall complete before runtime services begin execution.

 8.9 Runtime Service Initialization Runtime Services initialize after the kernel. Typical services include: locomotion manipulation perception balance speech world model human interaction mission services Runtime Services remain inactive until constitutional initialization completes.

 8.10 Constitution Loading The Constitution Runtime loads one or more constitutions. Sources may include: local storage secure storage cloud services fleet management organization policy mission packages The Constitution becomes the highest execution authority within HOS.

 8.11 Constitution Compilation Some implementations compile constitutions into runtime structures. Compilation may generate: validator graphs policy tables kernel objects execution constraints capability rules Compilation format remains implementation dependent.

 8.12 Validator Graph Construction The Constitution Runtime constructs Validator Graphs. Graphs may include: balance validators force validators collision validators ownership validators trust validators workspace validators tool validators mission validators Graphs become available before applications execute.

 8.13 Capability Registry Initialization The Capability Registry registers executable capabilities. Example capabilities include: Walk Stand Reach Grasp Lift Carry Speak Observe Capabilities remain unavailable until constitutional initialization completes.

 8.14 HObject Initialization The Runtime Object Manager creates fundamental HObjects. Typical objects include: Robot Object Constitution Object Capability Registry World Object Trust Object Mission Manager Additional HObjects may be created dynamically.

 8.15 Mission Initialization Mission services initialize operational context. Mission initialization may include: owner organization location mission package communication endpoints supervisory systems Mission context may remain empty until a mission begins.

 8.16 Release Token Authority The Release Token Authority initializes after constitutional services. No Release Tokens shall be issued before successful constitutional initialization. The Release Token Authority becomes the exclusive producer of Release Tokens.

 8.17 Actuator Firewall Initialization The Actuator Firewall initializes before actuator enablement. During initialization the firewall verifies: Release Token Authority validator availability safety envelopes execution policies Actuator outputs remain disabled until firewall initialization completes.

 8.18 Physical Enablement Following successful initialization: runtime services activate capabilities become available applications may execute inference begins generating CHATs Physical motion remains governed by constitutional execution.

 8.19 Boot Failure Initialization failures may occur. Examples include: Constitution unavailable validator initialization failure hardware fault actuator fault authentication failure secure boot failure Failures may cause: degraded operation restricted capabilities maintenance mode simulation mode safe shutdown No unauthorized physical execution shall occur after boot failure.

 8.20 Warm Boot HOS may support warm boot. Warm boot may preserve: world model mission state HObjects communication state perception caches Constitutional authority shall be revalidated after warm boot.

 8.21 Distributed Boot Distributed humanoid systems may initialize multiple processors independently. Examples include: head processor torso processor arm processor hand processor foot processor Distributed processors synchronize through the Humanoid Kernel before physical execution.

 8.22 Cloud-Assisted Boot Some HOS implementations may retrieve resources during initialization. Examples include: constitutions validator packages mission packages organization policies software updates Loss of connectivity shall not permit bypass of constitutional authority.

 8.23 Boot Audit The boot process should generate an immutable audit record. Typical information includes: firmware version kernel version constitution version validator versions capability registry version hardware configuration initialization status exceptions Audit records support certification and diagnostics.

 8.24 Boot State Machine The conceptual boot state machine is: Power Off

↓

Firmware

↓

Secure Boot

↓

Hardware Ready

↓

Kernel Ready

↓

Constitution Ready

↓

Capabilities Ready

↓

Firewall Ready

↓

Operational Transitions remain implementation dependent.

 8.25 Future Boot Extensions Future HOS specifications may define: distributed constitutional boot fleet boot constitutional hot reload validator hot reload cloud-assisted initialization constitutional synchronization boot certification trusted hardware attestation These extensions remain compatible with the Constitutional Boot Process defined by this specification.

 8.26 Architectural Principle The Constitutional Boot Process establishes the defining characteristic of HOS. Conventional operating systems boot software. HOS first establishes constitutional authority, then enables physical execution. Accordingly, a humanoid robot is not considered operational merely because its processors are running. A humanoid robot becomes operational only after its Constitution, Validator Graph, Capability Registry, Release Token Authority, and Actuator Firewall have been successfully initialized and physical authority has been established.  Part IX — Trust and Security 9.1 Overview The Humanoid Operating System (HOS) extends conventional computer security into the physical world. Traditional operating systems protect digital assets such as files, memory, processors, and networks. HOS additionally protects physical assets, including humans, property, tools, environments, and the humanoid robot itself. Accordingly, HOS security is based upon the principle that every physical action must be attributable, authorized, auditable, and revocable.

 9.2 Security Objectives The primary security objectives of HOS are: protect humans protect property protect the robot protect mission integrity establish execution authority prevent unauthorized physical execution maintain auditability support accountability

 9.3 Trust Architecture HOS maintains trust relationships among participating entities. Typical entities include: humans humanoid robots organizations operators owners cloud services tools missions facilities Trust relationships may evolve throughout operation.

 9.4 Identity Every significant entity within HOS should possess an identity. Examples include: Robot Identity Human Identity Organization Identity Operator Identity Application Identity AI Model Identity Tool Identity Mission Identity Identity formats remain implementation dependent.

 9.5 Authentication Authentication verifies identity. Authentication mechanisms may include: passwords certificates cryptographic keys biometrics hardware security modules secure enclaves trusted platform modules remote attestation Authentication alone does not authorize physical execution.

 9.6 Authorization Authorization determines whether an authenticated entity possesses sufficient authority to perform an action. Authorization may consider: ownership custody role organization mission location environment constitutional policy validator outputs Authorization is evaluated before Release Tokens are issued.

 9.7 Ownership Ownership defines legal or organizational control over a humanoid robot. Ownership information may include: owner organization registration asset identifier hardware identifier certificate Ownership does not automatically grant unlimited execution authority.

 9.8 Custody Custody represents operational responsibility. Custody may change over time. Examples include: owner fleet operator hospital warehouse temporary operator municipal authority service technician Custody transitions shall remain auditable.

 9.9 Mission Authority Mission Authority defines the scope of authorized operation. Mission Authority may specify: geographic region operating hours task limits human interaction tool use environmental restrictions expiration Mission Authority limits physical execution.

 9.10 Trust Levels HOS may assign Trust Levels. Trust Levels may be associated with: AI models humans robots sensors software tools organizations missions Trust Levels may influence: validator selection safety envelope human confirmation execution speed capability availability

 9.11 Least Authority HOS follows the principle of least authority. Applications receive only the minimum capabilities required to perform their functions. Similarly: runtime services drivers AI models operators should receive only necessary execution authority.

 9.12 Principle of Constitutional Authority Constitutional Authority supersedes application authority. Even if an application requests execution, HOS may deny execution based upon constitutional policy. Applications shall not bypass constitutional authority.

 9.13 Secure Communication Communication channels may be protected using: encryption authentication integrity verification replay protection message signing Communication security remains implementation dependent.

 9.14 Release Token Security Release Tokens represent physical execution authority. Release Tokens should support: cryptographic signing expiration revocation uniqueness replay protection Release Tokens should not be forgeable.

 9.15 Capability Token Security Capability Tokens authorize capability classes. Capability Tokens may include: capability identifier expiration trust level body region organization mission Capability Tokens should remain separate from Release Tokens.

 9.16 Secure Runtime Objects HObjects shall preserve integrity throughout execution. HObjects should support: ownership versioning integrity serialization authorization auditing Unauthorized modification should be detectable.

 9.17 Secure Boot The Constitutional Boot Process establishes trusted execution. Secure Boot may verify: firmware kernel runtime constitutions validator packages capability registry Actuators remain disabled until successful completion.

 9.18 Audit Every significant execution decision should generate audit information. Typical audit events include: authentication authorization validator execution Release Token generation execution exceptions mission updates custody changes Audit information should be immutable.

 9.19 Logging Logging provides operational visibility. Logs may include: runtime events diagnostics telemetry hardware faults constitutional exceptions execution history Logging does not replace auditing.

 9.20 Privacy Humanoid robots frequently observe humans. Implementations should protect: identity conversations images biometrics location health information personal preferences Privacy policy remains implementation dependent.

 9.21 Safety Safety remains one component of constitutional execution. Safety mechanisms may include: collision avoidance balance protection force limits workspace restrictions human proximity emergency stop fallback behaviors Safety operates alongside constitutional policy.

 9.22 Incident Response Security incidents may include: unauthorized access validator failure communication compromise hardware tampering Release Token misuse software corruption mission compromise Responses may include: capability revocation Release Token revocation safe state emergency shutdown human notification audit preservation

 9.23 Distributed Trust Multiple humanoid robots may cooperate. Distributed trust may include: robot identity capability exchange validator sharing mission coordination shared world models shared trust Trust relationships remain implementation dependent.

 9.24 Future Security Extensions Future HOS specifications may define: Constitutional Secure Boot Distributed Trust Services Fleet Identity Multi-Robot Authentication Trust Ledger Constitutional PKI Secure HObject Transfer Remote Attestation Zero-Trust Runtime Humanoid Security Certification These extensions remain compatible with the Trust and Security architecture defined by this specification.

 9.25 Security Philosophy Security within HOS extends beyond preventing unauthorized software access. The objective is to establish trustworthy physical execution. Accordingly: identity establishes who is acting, authentication verifies identity, authorization determines permitted capabilities, constitutional policy governs execution, validators evaluate safety and feasibility, Release Tokens authorize execution, the Actuator Firewall enforces execution, auditing records execution. This layered trust architecture enables deterministic governance of humanoid robots operating in human environments while remaining independent of specific hardware platforms, artificial intelligence models, and software implementations. Part X — Conformance 10.1 Overview This section defines the conformance requirements for the Humanoid Operating System (HOS). The purpose of conformance is to ensure that independently developed implementations exhibit consistent architectural behavior while permitting implementation flexibility. This specification defines behavioral requirements rather than implementation requirements. Accordingly, conformant implementations may differ internally while remaining externally compatible.

 10.2 Conformance Philosophy A Humanoid Operating System implementation conforms to this specification when its externally observable behavior satisfies the normative requirements defined herein. This specification intentionally does not require: a specific processor a specific operating system a specific programming language a specific robot manufacturer a specific middleware a specific artificial intelligence model Only architectural behavior is standardized.

 10.3 Levels of Conformance HOS defines four conformance levels. Level 1 — Core Conformance Core implementations provide: Humanoid Kernel Constitution Runtime Runtime Services Capability APIs Actuator Firewall HObjects Core implementations establish constitutional execution.

 Level 2 — Runtime Conformance Runtime implementations additionally support: Runtime Objects Validator Graphs Release Tokens Safety Envelopes Execution Manifests Resource Management

 Level 3 — Distributed Conformance Distributed implementations additionally support: fleet operation distributed runtime edge/cloud execution synchronization HObject serialization distributed missions

 Level 4 — Enterprise Conformance Enterprise implementations additionally support: audit certification fleet identity organization policies constitutional packages trust services compliance services

 10.4 Required Components Every conformant implementation shall include: Humanoid Kernel Constitution Runtime Runtime Services Actuator Firewall Capability Registry Release Token Authority HObject Runtime These components may be implemented differently while preserving architectural semantics.

 10.5 Required HObjects Conformant implementations shall support the following HObjects. Required objects include: Robot Object Mission Object Capability Object Candidate Action Object (CHAT) Validator Object Constitution Object Release Token Capability Token Safety Envelope Execution Manifest Additional HObjects may be implemented.

 10.6 Required Runtime Behavior A conformant implementation shall: receive capability requests generate Candidate Humanoid Action Tokens (CHATs) perform constitutional evaluation execute validator graphs generate Release Tokens enforce execution through an Actuator Firewall maintain HObjects produce audit information No conformant implementation shall permit direct actuator execution that bypasses constitutional evaluation.

 10.7 Required API Behavior Public APIs shall exhibit consistent semantics. For example: Walk()

must request walking capability.

It shall not directly command motors. Similarly, Grasp()

must generate a Candidate Action.

It shall not directly control actuators. Equivalent interfaces are permitted.

 10.8 Required Constitutional Behavior Every conformant implementation shall: load a Constitution evaluate constitutional policy generate validator graphs authorize capabilities issue Release Tokens support constitutional exceptions Implementations may extend constitutional behavior.

 10.9 Required Kernel Behavior The kernel shall: schedule physical execution allocate resources synchronize body regions manage interrupts maintain runtime state Scheduling algorithms remain implementation dependent.

 10.10 Required Boot Behavior Every conformant implementation shall establish constitutional authority before enabling physical execution. Boot shall include: kernel initialization runtime initialization constitution loading validator initialization capability registration actuator firewall initialization Actuators shall remain disabled until initialization completes.

 10.11 Interoperability Independent implementations should interoperate. Examples include: applications SDKs runtime objects constitutional packages validator definitions HObject serialization Future specifications may expand interoperability.

 10.12 Version Compatibility Every implementation shall expose version information. Example: HOS Version

Runtime Version

Kernel Version

API Version

Constitution Version Applications may negotiate compatibility.

 10.13 Vendor Extensions Vendors may define extensions. Extensions should: preserve HOS semantics preserve constitutional execution preserve HObject compatibility preserve Release Token semantics Vendor extensions should not alter required architectural behavior.

 10.14 Deprecated Features Future HOS versions may deprecate interfaces. Deprecated functionality should remain available for at least one major version whenever practical.

 10.15 Compliance Testing Compliance testing may verify: constitutional execution validator behavior API semantics Release Token generation HObject lifecycle audit generation boot behavior Compliance testing remains implementation independent.

 10.16 Certification Future HOS certification programs may evaluate: functional compliance interoperability safety security constitutional execution runtime behavior Certification procedures remain outside the scope of this specification.

 10.17 Reference Implementation Future HOS releases may provide one or more reference implementations. Reference implementations illustrate architecture. They do not define the standard. The standard is defined by this specification.

 10.18 Standards Evolution This specification represents Version 0.1. Future versions may expand: APIs Runtime Services HObjects Constitutional Computing Kernel Services Security Distributed Systems Backward compatibility should be maintained whenever practical.

 10.19 Future Companion Specifications This document serves as the architectural foundation for future specifications including: Humanoid Constitution Specification HObject Runtime Specification Humanoid SDK Specification Humanoid Kernel Specification Humanoid API Specification Release Token Specification Validator Graph Specification Capability Registry Specification Actuator Firewall Specification Distributed Runtime Specification Humanoid Trust Architecture Conformance Test Suite

 10.20 Final Architectural Principle The Humanoid Operating System defines a common execution architecture for humanoid robots. Applications request capabilities. Artificial intelligence generates Candidate Humanoid Action Tokens (CHATs). The Constitution determines authority. Validators determine feasibility. The Release Token authorizes execution. The Kernel schedules execution. The Actuator Firewall enforces execution. The Hardware performs physical work. Any implementation exhibiting these architectural behaviors while satisfying the normative requirements of this specification may claim conformance to the Humanoid Operating System (HOS) Technical Specification.  Appendices

 Future Companion Specifications This document intentionally defines the overall HOS architecture. Future documents expand individual architectural components while preserving compatibility with this specification. Core Architecture TR-HOS-TS-1.0 — Humanoid Operating System Technical Specification Constitutional Computing RFC-HC-0001 — Humanoid Constitution RFC-HRTK-0001 — Release Token Architecture RFC-HVF-0001 — Validator Graph RFC-HCAP-0001 — Capability Registry Kernel RFC-HK-0001 — Humanoid Kernel RFC-HIRQ-0001 — Physical Interrupt Architecture RFC-HSCH-0001 — Whole-Body Scheduler Runtime RFC-HOBJ-0001 — HObject Runtime Model RFC-HRT-0001 — Runtime Services Inference RFC-HINF-0001 — Humanoid-Native Inference RFC-HCHAT-0001 — Candidate Humanoid Action Tokens RFC-HWM-0001 — World Model Interface APIs RFC-HAPI-0001 — Humanoid Programming Interface RFC-HSDK-0001 — Humanoid SDK Security RFC-HTA-0001 — Humanoid Trust Architecture RFC-HAUTH-0001 — Identity and Authentication RFC-HAUD-0001 — Audit Architecture Boot RFC-HBOOT-0001 — Constitutional Boot Process Certification RFC-HCERT-0001 — HOS Certification RFC-HCTS-0001 — Conformance Test Suite Reference Software HOS Reference Implementation HOS Developer Guide HOS Simulator HOS Examples Repository  Actuator Firewall ............ 154

Audit Object ................. 155

Capability ................... 156

Capability Registry .......... 157

Capability Token ............. 158

Candidate Humanoid Action Token (CHAT) ... 159

Constitution ................. 160

Constitution Runtime ......... 161

Execution Manifest ........... 162

HAPI ......................... 163

HObject ...................... 164

HOS .......................... 165

Humanoid Kernel .............. 166

Mission Object ............... 167

Release Token ................ 168

Runtime Services ............. 169

Safety Envelope .............. 170

Trust Object ................. 171

Validator Graph .............. 172

Whole-Body Resource Manager .. 173