FA-CANON-INT-001 — Layer Interface Standards

Canonical Doctrine Document | Foundation Architect Institute

Canonical Axioms Governing This Document

Formation precedes execution.
Architecture governs process.
Identity anchors structure.
Structural clarity precedes operational optimization.

All doctrine within this document is subordinate to and consistent with axioms established in FA-CANON-001, Identity Layer doctrine in FA-CANON-002, Governance Layer doctrine in FA-CANON-003, and Structural Architecture Layer doctrine in FA-CANON-004. No statement herein redefines or supersedes foundational canon.

1. Interface Governance Principles

The Formation Architecture structural model defines five layers in a governed sequence: Identity, Governance, Structural Architecture, Execution, Signal. Each layer governs the layer immediately below it and expresses the layer immediately above it. This sequence is not a descriptive hierarchy. It is a structural governance chain. Each link in the chain is an interface — a defined boundary between two adjacent layers across which governed content passes in one direction under specified conditions.

Architecture governs process. Layer interfaces are the mechanisms by which this axiom is enforced across the full institutional structure. Without defined interfaces, the governing relationship between layers collapses into adjacency without authority. Layers influence one another informally. Content crosses layer boundaries without authorization. Lower layers redefine higher layers by accumulating unauthorized content without a structural mechanism to detect or prevent it.

Formation precedes execution. The interface chain enforces this axiom by requiring that each layer's governing outputs be confirmed as complete before the receiving layer may proceed. An institution that begins Execution activity before the Structural Architecture → Execution interface has been satisfied has not achieved governed formation. It has initiated activity in the absence of structural authorization.

Layer interfaces operate according to four governing principles:

Unidirectional authority. Interfaces transmit governing content downward only. Lower layers receive from higher layers. Lower layers do not emit upward to redefine higher layers. A lower layer may produce diagnostic evidence that informs a higher layer's revision process through governed canon evolution procedures. That is a revision act, not an interface emission. The interface itself is unidirectional.

Completeness before reception. A receiving layer does not treat upstream content as governing until Interface Acceptance Conditions are satisfied. Partial or incomplete emissions do not constitute governed handoffs. A layer that proceeds on incomplete upstream content operates without structural authorization, producing the same institutional conditions as the absence of the upstream layer.

Explicit authorization. Interface Emissions are not implied by the existence of upstream content. They are explicitly defined, structured outputs that the emitting layer produces in accordance with its canonical doctrine. An emitting layer that has not produced its required Interface Emissions has not completed its formation function regardless of the operational activity occurring within it.

Audit accessibility. Every interface must be auditable. The Interface Emissions and Acceptance Conditions at each layer boundary must be documented in a form that governance review can assess. Interfaces that cannot be audited cannot be enforced. Unauditable interfaces are structurally equivalent to absent interfaces.

2. Identity → Governance Interface Specification

2.1 Emitting Layer: Identity

The Identity Layer emits to the Governance Layer the foundational structural content from which Governance derives its authority, constraints, and standards. The Identity Layer does not emit operational content. It does not emit process definitions, role descriptions, or workflow specifications. It emits the governing structural conditions that define what Governance is authorized to enforce.

Required Interface Emissions — Identity → Governance:

Purpose Constraint Set. A structured articulation of the institution's foundational purpose expressed as governing constraints on Governance Layer authority. Purpose Constraints define the boundaries within which Governance may assign authority, establish decision rules, and enforce standards. Governance authority that cannot be traced to a Purpose Constraint is not derived authority within the Formation Architecture model.

Boundary Set. The complete set of Identity Layer Boundary Definitions (as established in FA-CANON-002) expressed as structural constraints on institutional scope. The Boundary Set defines what the institution will not become, what categories of activity fall outside institutional authority, and what relational conditions are impermissible. The Boundary Set constrains Governance from authorizing activity that exceeds or contradicts Identity Layer boundaries.

Identity Constraint Set. The formally defined set of non-waivable constraints derived from Identity Layer purpose and boundaries (as specified in FA-CANON-002 v1.1 when ratified). Identity Constraints define the highest-order Decision Constraints at the Governance Layer. No Governance Layer authority holder may waive an Identity Constraint. Identity Constraint revision is a WLROE-governed act under the Canon Evolution Protocol.

Non-Negotiables. Explicit statements of Identity Layer commitments that Governance must enforce without exception, discretion, or operational override. Non-Negotiables differ from Identity Constraints in scope: Identity Constraints define what Governance may not authorize; Non-Negotiables define what Governance must enforce regardless of operational conditions.

Revision Triggers. Defined conditions under which the Identity Layer emissions require reassessment and potential revision through governed canon evolution procedures. Revision Triggers do not authorize Governance to revise Identity. They authorize Governance to initiate an escalation to WLROE when Identity Layer content appears to require revision in light of structural conditions Governance has encountered.

2.2 Receiving Layer: Governance

The Governance Layer does not proceed to define authority structures, Decision Constraints, or enforcement mechanisms until all Identity → Governance Interface Acceptance Conditions are confirmed satisfied.

Interface Acceptance Conditions — Governance receiving from Identity:

Purpose Constraint Set is complete, internally consistent, and expressed in structural terms that Governance can translate into authority assignments.
Boundary Set is explicit, covers all domains of institutional activity, and contains no internal contradictions.
Identity Constraint Set is formally defined with constraint entry schema satisfied for each constraint.
Non-Negotiables are stated as declarative requirements, not aspirational preferences.
Revision Triggers are defined as structural conditions, not as operational circumstances.
All five emissions are documented and accessible to governance review.

When any Acceptance Condition is not satisfied, the Governance Layer is required to escalate to the Identity Layer for completion before proceeding. Governance that proceeds on unsatisfied Acceptance Conditions does not hold structural authorization within the Formation Architecture model.

3. Governance → Structural Architecture Interface Specification

3.1 Emitting Layer: Governance

The Governance Layer emits to the Structural Architecture Layer the authority structures, constraints, and enforcement mechanisms from which Structural Architecture derives its relational topology, entity boundaries, system flows, and authority routing logic. The Governance Layer does not emit relational maps, entity definitions, or operational flows. It emits the governing authority logic that Structural Architecture expresses as institutional structure.

Required Interface Emissions — Governance → Structural Architecture:

Authority Domain Set. The complete set of defined authority domains (as specified by the Authority Domain Schema in FA-CANON-003 v1.1 when ratified). Each authority domain must carry: domain name and type, derivation citation from Identity Layer, scope boundaries, decision rights, applicable constraints, accountability target, escalation target, and audit mechanism. Structural Architecture uses the Authority Domain Set to assign boundary definitions and routing logic to institutional entities and roles.

Decision Constraint Set. The complete set of Decision Constraints organized by category (identity, authority, operational) with Constraint Precedence Rules applied. The Decision Constraint Set defines the governing rules within which Structural Architecture establishes system flows and authority routing. System Flows that permit decisions or authority movements prohibited by the Decision Constraint Set are not structurally authorized.

Structural Enforcement Mechanisms. The defined set of enforcement mechanisms (Standards, Review Structures, Escalation Pathways, Revision Governance) as established in FA-CANON-003. Structural Architecture receives these mechanisms as governing inputs and expresses them as auditable structural features — the relational and systemic infrastructure through which enforcement reaches the Execution Layer.

Escalation Pathway Map. The defined set of escalation pathways specifying the structural route through which decisions, conflicts, and governance violations travel when they exceed the scope of a given authority domain. The Escalation Pathway Map governs Authority Routing logic at the Structural Architecture Layer. Authority Routing that does not reflect the Escalation Pathway Map is not authorized routing within the Formation Architecture model.

3.2 Receiving Layer: Structural Architecture

The Structural Architecture Layer does not proceed to define relational topology, entity boundaries, system flows, or authority routing until all Governance → Structural Architecture Interface Acceptance Conditions are confirmed satisfied.

Interface Acceptance Conditions — Structural Architecture receiving from Governance:

Authority Domain Set is complete, with all eight Authority Domain Schema elements satisfied for each domain.
Decision Constraint Set is internally consistent, Constraint Precedence Rules are applied, and conflict-handling mechanism is defined.
All four Structural Enforcement Mechanisms are present and defined (Governance Integrity Minimums satisfied per FA-CANON-003 v1.1 when ratified).
Escalation Pathway Map covers all defined authority domains without routing gaps.
All four emissions are documented and accessible to structural architecture review.

When any Acceptance Condition is not satisfied, the Structural Architecture Layer is required to escalate to the Governance Layer for completion before proceeding. Structural Architecture that proceeds on unsatisfied Acceptance Conditions does not hold structural authorization within the Formation Architecture model.

4. Structural Architecture → Execution Interface Specification

4.1 Emitting Layer: Structural Architecture

The Structural Architecture Layer emits to the Execution Layer the defined institutional structure within which operational activity is authorized to occur. The Structural Architecture Layer does not emit processes, workflows, or operational procedures. It emits the structural conditions — the relational environment, defined boundaries, system channels, and authority pathways — within which Execution operates under governance.

Required Interface Emissions — Structural Architecture → Execution:

Relational Topology Map. The complete structural map of institutional entities, roles, and systems including their relationships, dependencies, and boundaries. The Relational Topology Map defines the structural environment within which Execution activity occurs. Execution activity that involves entities, roles, or relationships not present in the Relational Topology Map is unauthorized activity — it operates outside the defined institutional structure.

Entity Boundary Set. The complete set of Entity Boundary definitions covering all institutional entities in the Relational Topology Map. Each Entity Boundary Set entry defines the authority boundaries, responsibility boundaries, and interface boundaries of the entity. Execution activity that crosses Entity Boundaries without defined interface authorization is a boundary violation, not an operational decision.

System Flow Map. The complete set of defined System Flows specifying the structural channels through which resources, information, decisions, and authority are authorized to move across the institutional structure. The System Flow Map governs Execution by constraining operational movement to defined channels. Execution activity that routes resources, information, decisions, or authority through channels not defined in the System Flow Map constitutes Flow Informalization — a Structural Architecture failure pattern identified in FA-CANON-004.

Authority Routing Map. The complete set of Authority Routing logic defining how decisions, escalations, and governance actions are directed to appropriate authority domains from the Execution Layer. The Authority Routing Map operationalizes Escalation Pathways at the Execution level. Execution activity that requires a decision beyond the scope of defined execution authority must follow the Authority Routing Map. Deviation from defined routing is a governance violation, not an operational exception.

4.2 Receiving Layer: Execution

The Execution Layer does not initiate operational processes, workflows, or projects until all Structural Architecture → Execution Interface Acceptance Conditions are confirmed satisfied.

Interface Acceptance Conditions — Execution receiving from Structural Architecture:

Relational Topology Map is complete, covers all entities and roles involved in planned execution activity, and is internally consistent.
Entity Boundary Set is defined for all entities in the Relational Topology Map with all three boundary types (authority, responsibility, interface) specified.
System Flow Map covers all four flow channels (resource, information, decision, authority) for all planned execution pathways.
Authority Routing Map covers all decision categories that Execution activity is expected to generate, including escalation triggers and resolution confirmation mechanisms.
All four emissions are documented and accessible to execution-level review.

When any Acceptance Condition is not satisfied, the Execution Layer is required to escalate to the Structural Architecture Layer for completion before proceeding. Execution that proceeds on unsatisfied Acceptance Conditions does not hold structural authorization within the Formation Architecture model.

5. Execution → Signal Interface Specification

5.1 Emitting Layer: Execution

The Execution Layer emits to the Signal Layer the authorized institutional outputs that Signal expresses externally. The Execution Layer does not emit Identity definitions, governance decisions, or structural architecture content to the Signal Layer. It emits the produced outputs of governed operational activity — what the institution has done, decided, created, or delivered within its structural authorization.

Signal reflects formation. The Execution → Signal interface is the structural mechanism by which this axiom is enforced. What Signal expresses must be traceable to authorized Execution outputs. Signal that expresses content not authorized by the Execution Layer — or that expresses Identity, Governance, or Structural Architecture content directly, bypassing Execution — constitutes Identity Substitution or unauthorized Signal emission.

Required Interface Emissions — Execution → Signal:

Authorized Output Set. The defined set of outputs produced by Execution activity that are authorized for Signal Layer expression. Authorization is confirmed by the Execution Layer's compliance with Structural Architecture constraints. Outputs produced by unauthorized execution activity — activity that violated Entity Boundaries, System Flow constraints, or Authority Routing requirements — are not authorized for Signal Layer expression.

Attribution Record. Structural attribution linking each authorized output to the institutional authority under which it was produced. Attribution Records enable Signal Layer expression to accurately reflect the institutional structure that produced each output. Signal that expresses outputs without attribution cannot be verified as reflecting formation. It may reflect activity, but not governed formation.

Boundary-Compliant Expression Parameters. The defined constraints governing how authorized outputs may be expressed at the Signal Layer, derived from Identity Layer Boundary Definitions and Governance Layer Decision Constraints. Boundary-Compliant Expression Parameters prevent the Signal Layer from expressing authorized outputs in ways that contradict Identity constraints or exceed Governance-defined communication boundaries.

5.2 Receiving Layer: Signal

The Signal Layer does not express institutional content until all Execution → Signal Interface Acceptance Conditions are confirmed satisfied.

Interface Acceptance Conditions — Signal receiving from Execution:

Authorized Output Set is defined and each output carries confirmed authorization traceable to Structural Architecture Layer permissions.
Attribution Record is complete for all outputs in the Authorized Output Set.
Boundary-Compliant Expression Parameters are defined and consistent with Identity Layer Boundary Set and Governance Layer Decision Constraint Set.
All three emissions are documented and accessible to signal review.

When any Acceptance Condition is not satisfied, the Signal Layer is required to escalate to the Execution Layer for completion before expressing institutional content. Signal expression that proceeds on unsatisfied Acceptance Conditions does not hold structural authorization and constitutes unauthorized Signal emission within the Formation Architecture model.

6. Interface Failure Patterns

The following interface failure patterns are canonical. Each constitutes a structural defect at a layer boundary. Interface failure patterns are distinct from layer-internal failure patterns. They define failures in the governing relationship between layers rather than failures within a single layer.

Incomplete Handoff. An emitting layer transmits partial Interface Emissions to the receiving layer. The receiving layer proceeds without confirming that Acceptance Conditions are satisfied. Incomplete Handoff produces receiving layers that operate on partially authorized structural conditions. The receiving layer's outputs are not fully governed because the inputs from which they are derived were not complete. Incomplete Handoff is detected at the Signal Layer — when Signal is inconsistent or incoherent, the diagnostic triage begins upstream to locate the interface at which the incomplete handoff occurred.

Layer Bypass. A layer acts on content from a non-adjacent upstream layer without the intervening layer having processed and authorized that content. The most institutionally damaging Layer Bypass pattern is Execution acting directly on Identity Layer content — treating stated purpose as operational authorization without the intervening Governance and Structural Architecture layers having established the authority structures, constraints, and relational infrastructure required for that activity to be governed. Layer Bypass produces activity that appears aligned with institutional purpose but is not authorized by institutional structure. It is structurally indistinguishable from ungoverned execution.

Unauthorized Emission. A layer emits content to the layer below it that exceeds its authorized emission scope. The Governance Layer emitting operational workflows to Structural Architecture — rather than authority domains and decision constraints — constitutes Unauthorized Emission. The receiving layer receives content that belongs to a lower layer, contaminating its structural inputs with content that should have been produced downstream. Unauthorized Emission produces Layer Collapse by design: the emitting layer absorbs the function of the receiving layer, eliminating the structural distinction that makes governance possible.

Acceptance Condition Bypass. A receiving layer proceeds without confirming Interface Acceptance Conditions. Acceptance Condition Bypass differs from Incomplete Handoff in origin: the emitting layer may have produced complete emissions, but the receiving layer fails to confirm satisfaction before proceeding. Acceptance Condition Bypass produces receiving layers that operate without structural verification of their governing inputs. Governance structures built on unverified Identity emissions may be internally coherent while being structurally misaligned with the Identity they are designed to express.

Upward Emission. A lower layer attempts to transmit content to a higher layer through the interface in the unauthorized upward direction — not through governed revision procedures, but as informal operational influence on upstream doctrine. Upward Emission is the interface-level expression of the failure pattern in which lower layers attempt to redefine higher layers. It is prevented by the unidirectional authority principle governing all layer interfaces. When a lower layer generates evidence that legitimately requires upstream revision, that evidence must travel through the Canon Evolution Protocol and Escalation Protocol, not through the interface.

7. Interface Audit Mechanism

Interface integrity requires periodic governed assessment. The Interface Audit Mechanism defines the structural requirements for auditing each layer interface against the standards established in this document.

Audit scope. Each interface audit assesses: completeness of Interface Emissions at the emitting layer, satisfaction of Acceptance Conditions at the receiving layer, absence of interface failure patterns, and documentation accessibility for each emission and acceptance confirmation.

Audit authority. Interface audits are conducted under FAI authority for L2 doctrine compliance. Audit findings that implicate Identity Layer emissions or Acceptance Conditions at the Identity → Governance interface are escalated to WLROE. Audit findings that implicate Governance Layer emissions are resolved within FAI authority with Verification Press editorial review before publication of audit results.

Audit cadence. Interface audits are conducted on a schedule defined by FA-CANON-GOV-001 (Canon Governance, Evolution, and Escalation Protocols) upon its ratification. Until FA-CANON-GOV-001 is ratified, interface audits are conducted prior to each new canon document issuance that implicates the interface being assessed.

Audit output. Each interface audit produces: interface compliance status (compliant / deficient / incomplete), specific deficiency identification by emission type or acceptance condition, severity classification, and remediation routing (which layer must act, under whose authority, through which change type per Canon Evolution Protocol).

Audit documentation. Interface audit outputs are archived as governance records under FAI authority. They are not published as canon documents. They are accessible to WLROE for governance review and to Verification Press for editorial context. Audit documentation informs but does not constitute canon revision.

8. Institutional Context

FA-CANON-INT-001 is authored under FAI canonical doctrine authority. It constitutes an L2 Structural Doctrine document per CANON_BUILD_PLAN_v1.0, Phase 1, Document 3. It is a prerequisite for FA-CANON-005 (Execution Layer Doctrine) and FA-CANON-006 (Signal Layer Doctrine).

WLROE governs interface standards at the Identity → Governance boundary. Any revision to Identity → Governance Interface Emissions or Acceptance Conditions that implicates Identity Layer doctrine requires WLROE ratification. FAI governs all remaining interface specifications including this document. Verification Press governs editorial translation and publication without authority to alter interface doctrine.

The institutional structure governing this document — WLROE, FAI, and Verification Press — itself operates as an interfaced system. WLROE emits governing authority to FAI. FAI emits canonical doctrine to Verification Press. Verification Press emits publication-ready content to institutional expression. The Formation Architecture Canon is governed by the structural principles it defines. That reflexive alignment is structural, not rhetorical.

9. Canon Navigation

FA-CANON-INT-001 is the fifth document in the Formation Architecture Canon and the third Phase 1 infrastructure document per CANON_BUILD_PLAN_v1.0. It establishes the inter-layer interface standards that govern all five-layer structural interactions across the Formation Architecture model.

All subsequent canon documents must treat layer interface doctrine as an established structural condition. FA-CANON-005 (Execution Layer Doctrine) must satisfy the Structural Architecture → Execution Interface Specification established herein. FA-CANON-006 (Signal Layer Doctrine) must satisfy the Execution → Signal Interface Specification established herein. No downstream document may redefine interface terms or contradict interface doctrine established herein.

Future canon expansions include interface diagnostic instruments (L3) and domain-specific interface application guidance (L4). Each must maintain alignment with the structural logic and interface definitions established in FA-CANON-001 through FA-CANON-INT-001.