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CONSTABLE
ProblemDefinitionsMechanismFor teamsScopeLexiconImplementation
SDSResearch, diagnosis, and architectural work.ZTGThe open specification defining structural governance requirements.ConstableThe commercial reference implementation and control kernel.

SDS maintains the open ZTG specification and builds Constable as a reference implementation. ZTG can be implemented without Constable.

SHADOW DYNAMIC SYSTEMS

Constable is a product of Shadow Dynamic Systems LLC. Built for institutions that treat authority as infrastructure.

Contact

Jason Crittenden
Founder & Research Lead

jason@shadowdynamicsystems.com

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Related

Zero Trust GovernanceZTG source on GitHubShadow Dynamic Systems
General Constable marketing material. No third-party certification, endorsement, regulatory approval, customer result, or insurance validation is claimed. Constable is a control kernel; it does not by itself make AI risk-free, guarantee compliance, or govern surfaces where it is not integrated.
© 2026 Shadow Dynamic Systems LLCAuthority defines admission.
Lexicon

The vocabulary, defined precisely.

2.1 Layers

  • Envelope
  • Invariant

2.2 The Execution Pipeline

  • Authorization (grant)
  • Effect channel
  • Governed action
  • Governed effect
  • Surface / sub-surface
  • The boundary (execution gate)

2.3 Authority and Identity

  • Authorizing identity
  • Delegation chain
  • Ratifying principal

2.4 Record, Time, and State

  • Decision-time
  • Evidence record (ZTG-4 evidence record)
  • Governance bundle
  • Governance state
  • Governance-relevant event
  • Replay

2.5 Consequence

  • Compositional multiplier / composite assessment
  • Harm class
  • Liability ceiling
  • reversal_strategy

2.6 States and Fault Families

  • Indeterminate effect
  • Stasis
  • Tamper family