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---
schema_version: "1.0"
id: "GL-271"
title: "GL-271 — Light Interface"
slug: "gl-271-light-interface"
type: "glossary_term"
status: "draft"
version: "0.1.0"
last_updated: "2026-06-24"
summary: "Light Interface is the interface that asks what may be done, filtering possible strategies through principles, gates, constraints, boundaries, compatibility, and restoration requirements."
canonical_url: "/archive/glossary/registry/gl-271-light-interface"
citation_id: "gl-271-light-interface-v0-1-0"
canon:
tier: "registry"
state: "draft"
source: "UTS Glossary Simplified Registry"
source_id: "GL-271"
classification:
family: "Glossary"
module: "Principles and Interface Terms"
module_group: "Reference Systems"
density: "Reference"
audience:
- "UTS readers"
- "researchers"
- "builders"
- "AI readers"
- "machine readers"
tags:
- "glossary"
- "registry"
- "gl-271"
- "light-interface"
- "admissibility"
- "principles"
aliases:
- "Light Interface"
- "May-be-done interface"
- "Permissibility filter"
- "Coherence authorization interface"
related:
laws:
- "Principle Constraint Field"
- "Hidden Debt Return Law"
invariants:
- "O ≠ Φ"
operators:
- "Σ"
- "Π"
- "Λ"
- "Θ"
- "Au"
- "ℛ"
- "Τ"
gates:
- "MS-Gate"
- "FI-Gate"
- "HR-Gate"
- "BΣ Validity"
- "Λ Compatibility"
- "Au-Actuation"
- "R Sufficiency"
- "Τ Validation"
diagnostics:
- "O"
- "H"
- "BΣ"
- "Au"
- "R"
- "µᵢ"
- "trajectory_integrity"
failure_modes:
- "Shadow Capture"
- "Inverted Principle"
- "Spiritual Bypass"
- "Naive Light"
- "Dominance Masquerading as Control"
restoration_arcs:
- "Truth Reconstruction"
- "Boundary Reconstitution"
- "Justice Aligned Repair"
- "Temporal Proof Arc"
modules:
- "glossary"
- "principles"
- "interfaces"
terms:
- "Shadow Interface"
- "Wisdom Interface"
- "Coherence Constraint Set"
- "TLWS-E"
- "Principle Constraint Field"
navigation:
order: 271
parent: "glossary"
visible: true
provenance:
created_from: "glossary-simplified-continuation"
source_thread: "GLOSSARY-REFACTOR.md"
source_file: "glossary-raw.docx"
notes: "Continued Principles and Interface Terms sequence."
entry:
term_id: "GL-271"
term: "Light Interface"
term_class:
- "Principles and Interface Term"
- "Admissibility Interface"
- "Principle Authorization Layer"
symbols:
- "Σ"
- "Π"
- "Λ"
---1. Short Definition
Light Interface is the interface that asks what may be done, filtering possible strategies through principles, gates, constraints, boundaries, compatibility, and restoration requirements.
2. Canonical Definition
In UTS, Light Interface authorizes or rejects execution after strategy-space has been revealed.
It answers:
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What may be done?The Light Interface converts possibility into admissibility review.
Canonical function:
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possible strategy
→ principle / gate / boundary / repair filtering
→ admissible or inadmissible actionThe Light Interface prevents shadow-derived strategies from becoming action without coherence validation.
3. Functional Role in UTS
Light Interface supports:
- admissibility
- governance
- non-harm
- AI safety
- justice
- boundary repair
- action selection
- security restraint
- restoration sequencing
- sovereignty protection
- principle alignment
It is the main interface that determines whether effectiveness is allowed to become execution.
4. Diagnostic Signatures
Light Interface coherent
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strategy filtered
principles active
BΣ protected
Λ checked
R considered
Au preserved
O protectedLight Interface bypassed
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effective strategy executes
without admissibility review
H↑
ι risk↑Light Interface restored
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principles reactivated
gates checked
inadmissible paths blocked
repair requirements defined5. Canonical Distinctions
Light Interface is not optimism
It is not merely positive framing.
It is admissibility filtering.
Light Interface is not Naive Light
Naive Light refuses to model risk.
Light Interface can authorize action only after risk is modeled.
Light Interface is not moral performance
It must materially constrain action.
Light Interface is not censorship
It filters execution by coherence, not by image protection.
6. U-Layer Mapping
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| U-Layer | Light Interface Expression |
|---|---|
| U0 | Material action is constrained by admissibility. |
| U1 | Resource use must not violate coherence constraints. |
| U2 | Boundaries, consent, contracts, and exit are checked. |
| U3 | Execution proceeds only after authorization. |
| U4 | Labels and narratives are tested against principle. |
| U5 | Timing and scale are reviewed with Wisdom Interface. |
| U6 | Field coherence impact is considered. |
| U7 | Memory and precedent inform admissibility. |
| U8 | External pressure does not override principle gates. |
7. Common Failure Patterns Addressed
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| Failure Pattern | Description |
|---|---|
| Shadow Capture | Strategy executes without authorization. |
| Inverted Principle | Principle language is used incoherently. |
| Dominance Masquerading as Control | Force is misclassified as control. |
| Spiritual Bypass | Meaning language replaces repair. |
| Naive Light | Principle action lacks shadow simulation. |
8. Restoration Implications
Light Interface restoration requires reestablishing admissibility filtering.
Typical sequence:
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Μ identify proposed action
→ retrieve shadow-space possibilities
→ test against TLWS-E
→ check gates and invariants
→ test BΣ and Λ
→ define repair obligations
→ authorize only admissible action
→ Τ validate outcomeThe Light Interface is restored when possible action no longer bypasses coherence constraints.
9. Machine-Readable Summary
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glossary_entry:
id: "GL-271"
term: "Light Interface"
symbols:
- "Σ"
- "Π"
- "Λ"
short_definition: "The interface that asks what may be done, filtering possible strategies through principles, gates, constraints, boundaries, compatibility, and restoration requirements."
term_family: "Principles and Interface Terms"
term_class:
- "Principles and Interface Term"
- "Admissibility Interface"
- "Principle Authorization Layer"
canonical_function:
- "possible strategy → principle / gate / boundary / repair filtering → admissible or inadmissible action"
diagnostic_positive:
- "strategy filtered"
- "principles active"
- "BΣ protected"
- "Λ checked"
- "R considered"
- "Au preserved"
- "O protected"
diagnostic_negative:
- "effective strategy executes"
- "admissibility review absent"
- "H↑"
- "ι risk↑"
restoration_requirements:
- "proposed action identification"
- "shadow-space retrieval"
- "TLWS-E testing"
- "gate and invariant checking"
- "BΣ and Λ testing"
- "repair obligation definition"
- "admissible authorization"
- "time validation"