The AEGON™ Policy Compiler is a deterministic compilation system that converts a finite semantic classification (a failure-class regime) into a canonical policy artifact (a policy bundle). The compiler is designed for reliability workflows where semantic clarity, repeatability, and governance are required.

AEGON is intended to operate alongside an existing system’s observation pipeline. It consumes the output of a fixed deterministic classifier (defined in the AEGON Algebra) and emits a structured policy bundle suitable for downstream review, auditing, dispatch, or controlled execution by separate systems.

The AEGON compilation pipeline is intentionally minimal: observations are normalized, classified into a finite semantic regime, and compiled into a canonical policy artifact.

Stage	Object	Deterministic Output
Observe	Normalized observation	o ∈ O
Classify	Failure-class regime	C(o) ∈ F
Compile	Policy bundle / Policy IR	Π(C(o)) ∈ P
Serialize	Canonical JSON	S(Π(C(o))) ∈ 𝒥

AEGON consumes a failure-class regime (or a classifier output that resolves to a regime) and produces a policy bundle. The compiler is deterministic: identical semantic input yields identical policy output.

§3.1 Inputs

Inputs are semantic regimes in a finite ontology. The precise observation structure is not required by the compiler; the compiler operates over F, not raw telemetry.

§3.2 Outputs

Outputs are policy bundles in a structured Policy IR, suitable for canonical serialization and downstream processing. Policy bundles represent declarative intent (e.g., freeze mutation, isolate dependency, page on-call) and are not executable by themselves.

{
  "tier": "pro",
  "on": "CONTROL_PLANE_SATURATION",
  "actions": [
    { "name": "freeze_control_plane", "params": { "window_minutes": 30 } },
    { "name": "page_oncall", "params": { "severity": "high" } }
  ],
  "evidence": ["incident_id", "top_signals", "invariant_summary"],
  "notes": ["compiled_deterministically", "non_executing_artifact"]
}

Annotation: A canonical policy bundle is an auditable artifact. Enforcement is external to AEGON.

AEGON relies on a finite semantic ontology of failure classes. These failure classes represent violated structural invariants and are treated as semantic atoms of system interpretation. A partial order over failure classes represents semantic dominance (escalation and containment), enabling canonical reconciliation where multiple regimes apply.

Where joins are defined, AEGON can reconcile multi-regime evidence by selecting a least upper bound, producing a single canonical regime rather than competing interpretations.

A policy bundle is a structured object that binds a triggering failure class to a canonical set of policy actions, capability gates, evidence requirements, and human-facing annotations. The Policy IR is designed to be stable, serializable, and governance-friendly.

§5.1 Bundle Components

Field	Purpose	Notes
on	Triggering failure class	Finite ontology; deterministic selection
tier	Capability gate / entitlement	Optional; enables controlled exposure
actions	Ordered declarative action list	Order is meaningful; execution is external
evidence	Required explanatory artifacts	Supports audit, review, governance
notes	Human-facing annotations	Non-normative, informational

§5.2 Neutral Policy

Non-action is represented explicitly as a neutral policy bundle. This prevents “implicit defaults” from being conflated with semantic meaning. If the semantic regime is neutral (no violated invariants), compilation yields a neutral bundle with an empty action list (or an explicit no-op action).

AEGON supports a minimal policy language intended for human-authored policy mappings. The language is finite and intentionally non-Turing-complete: it contains no loops, recursion, or dynamic inference. Expressiveness is achieved through the finite choice of failure class and the ordered action list.

§6.1 Minimal Constructs

Construct	Meaning	Example
TIER	Capability gate	TIER pro
ON	Trigger failure class	ON CONTROL_PLANE_SATURATION
DO	Emit action	DO freeze_control_plane
WITH	Attach parameters	WITH window_minutes=30
END	Close block	END

§6.2 Code Example

TIER pro
ON CONTROL_PLANE_SATURATION
DO freeze_control_plane
WITH window_minutes=30
DO page_oncall
WITH severity=high
END

Annotation: The policy language is a presentation layer. Semantics are determined by compilation.

In AEGON documentation, “opcode” refers to a minimal syntactic construct with a fixed semantic role in the compilation process. The policy language constructs are treated as opcodes in the sense that they are finite, declarative, and structurally stable.

§7.1 Opcode Semantics Summary

Opcode	Role	Compiler Impact
TIER	Gate policy by capability	Sets bundle entitlement metadata
ON	Bind to failure class	Determines trigger of bundle
DO	Add action	Appends ordered action node
WITH	Parameterize action	Attaches finite key–value map
END	Close policy block	Commits bundle for canonicalization

The compiler parses policy source into semantic components (trigger, gate, ordered actions). It then canonicalizes the output: field ordering, normalized parameter formatting, and stable serialization conventions.

§8.1 Canonical JSON

Canonicalization ensures deterministic output across environments. AEGON uses stable ordering and normalization rules to produce bit-for-bit identical serialized policy bundles under identical inputs.

{
  "tier": "pro",
  "on": "CONTROL_PLANE_SATURATION",
  "actions": [
    { "name": "freeze_control_plane", "params": { "window_minutes": 30 } },
    { "name": "page_oncall", "params": { "severity": "high" } }
  ],
  "evidence": [],
  "notes": []
}

Annotation: Canonical JSON is deterministic and audit-friendly. It is not an execution plan.

Determinism is a primary property of AEGON compilation. Identical semantic regimes and identical policy mappings yield identical policy bundles. This supports reproducibility, governance, and reliability workflows.

§9.1 Neutrality

Neutrality is explicitly constructed: if the failure class is the neutral regime, the compiled result is a neutral policy bundle. This makes “no action” a first-class semantic result rather than an implicit default.

AEGON errors are designed to be deterministic, descriptive, and stable. The compiler should never “guess.” Diagnostic output is intended for developers and operators, and it should support quick resolution and auditing.

§10.1 Error Categories

Category	Description	Typical Resolution
ParseError	Invalid syntax or malformed opcode sequence	Fix source policy file; recompile
UnknownFailureClass	Trigger references non-ontology symbol	Correct spelling / update mapping
InvalidParameter	Parameter violates allowed domain	Normalize types / keys; recompile
UnsupportedTier	Capability gate references unknown tier	Adjust tier or gate configuration

§10.2 Example Diagnostic

[AEGON] ParseError: expected END before EOF
  at line 6: DO page_oncall
  hint: close the policy block with END

Annotation: Diagnostics are deterministic and do not alter compilation semantics.

AEGON is designed to support enterprise governance. The compiler produces artifacts that can be reviewed, signed, staged, audited, and deployed under existing change-control systems. AEGON does not require privileged execution.

§11.1 Auditability

Policy bundles can include evidence requirements and annotations to support traceability. Canonical serialization enables exact comparison across time, environments, and releases.

§11.2 Change Control

AEGON supports a controlled lifecycle: policy source changes are reviewed, compiled, diffed, and promoted through environments. This enables deterministic policy evolution rather than ad hoc live edits.

This section provides practical workflows showing how AEGON fits into real reliability processes. Examples are declarative and deterministic, and they separate compilation from enforcement.

§12.1 Workflow: Compile a Policy Pack

# 1) Author policy source
# 2) Compile to Policy IR
# 3) Validate canonical JSON
# 4) Promote artifact to staging / production

Annotation: AEGON output is an artifact suitable for promotion pipelines.

§12.2 Workflow: Neutral Regime

# Input: failure class F0 (neutral)
# Output: policy bundle p0 with empty action list

Annotation: Non-action is explicitly represented and auditable.

§12.3 Workflow: Multi-Regime Reconciliation (Join)

# Input evidence: regime Fa and regime Fb
# Resolve: Fa ∨ Fb (least-dominating regime)
# Compile: Π(Fa ∨ Fb) -> canonical policy bundle

Annotation: Reconciliation produces one canonical regime (no competing interpretations).

AEGON integrates cleanly with existing observability and incident workflows because it outputs declarative policy bundles. The compiler does not require invasive changes to the runtime system.

§13.1 Pattern: CI/CD Policy Artifact Promotion

Treat compiled policy bundles like build artifacts: versioned, diffed, approved, and promoted. This supports stable governance and deterministic rollback.

§13.2 Pattern: Human-in-the-Loop Approval

AEGON can be deployed as a semantic policy generator whose output requires explicit approval before execution by downstream systems. This supports high-safety environments and legal review.

§13.3 Pattern: External Enforcement Layer

Downstream enforcement systems interpret AEGON policy bundles and perform controlled actions. AEGON remains agnostic to the enforcement mechanism, preserving semantic stability.

AEGON is distributed as a deterministic compiler with documentation and canonical output formats. Licensing may vary by tier, deployment model, and support requirements.

§14.1 Support Scope

Support typically includes: policy language onboarding, canonical output validation, integration guidance, and deterministic compilation troubleshooting. Enforcement-layer engineering is explicitly out of scope unless contracted separately.

AEGON is a deterministic compiler from finite failure semantics to canonical policy artifacts. Its value is semantic stability: a finite ontology of regimes, repeatable compilation, and audit-friendly outputs that support governance.

By separating interpretation (failure-class semantics) from action representation (policy bundles), AEGON supports enterprise-grade reliability workflows where deterministic meaning and controlled response are required.

Key terms used throughout this Developer Guide.

Term	Meaning
AEGON	Finite semantic system for deterministic classification and compilation of policy artifacts.
Failure Class	A semantic atom representing a violated structural invariant of a system.
Ontology	A finite, closed set of meaningful regimes in a domain (here: failure classes).
Semantic Regime	A resolved failure-class interpretation that represents the system’s meaning-state for policy selection.
Policy Bundle	A structured declarative artifact containing trigger, gate, actions, evidence, and annotations.
Policy IR	The internal representation schema for policy bundles (stable and serializable).
Canonicalization	Normalization rules producing stable, deterministic output under identical inputs.
Neutral Policy	Explicit compiled non-action bundle corresponding to the neutral semantic regime.
Determinism	Same input yields same output under repeated evaluation, independent of time or environment.

This catalog lists common compiler error classes in stable, deterministic form. Implementations may extend this list without changing the semantics of existing errors.

Error Code	Name	Meaning
E001	ParseError	Invalid opcode sequence or malformed policy source.
E002	UnknownFailureClass	Policy references a failure class symbol not in the finite ontology.
E003	InvalidParameter	Parameter violates allowed type or key-domain constraints.
E004	UnsupportedTier	Tier identifier is not recognized by the configured capability gate set.

Index entries include section numbers using the § symbol.

Index Entry	Where
AEGON overview	§1
Conceptual model (pipeline)	§2
Inputs and outputs	§3
Failure-class semantics	§4
Policy bundles / Policy IR	§5
Minimal policy language	§6
Opcodes and constructs	§7
Parsing and canonicalization	§8
Compilation determinism	§9
Errors and diagnostics	§10, Appendix B
Security and governance	§11
Example workflows	§12
Integration patterns	§13
Licensing and support	§14
Scope and non-goals	§15
Glossary	Appendix A