Optional reference — terminology including ARPA-internal names. Product path: concepts.md and INDEX.md.
| Term | Meaning |
|---|---|
| αύρα / AVRA / AURA | Runtime coat / harness / field around the loop |
| Body | Host loop while running — script, Skillware, framework |
| Membrane | Ingress → body cavity → egress → audit sink |
| Ingress | Session-open boundary; normalized context enters the cavity |
| Egress | Policy gate before tool/skill execution leaves the cavity |
| Observer | Parallel audit trail subscriber (does not block host) |
| Host | Adapter that runs skills inside the body (SkillwareHost, mocks) |
| Aura Manifest | Birth declaration — type bindings + spectrum + optional sequencer |
| AuraEvent | Single append-only audit record |
| Aura Spectrum | Levels, services, budgets, output profiles — control plane |
| Adapter | Type plugin or runtime wrapper connecting foreign stack to harness |
| Binding | One { type, config } entry in manifest |
| Bridge | Integration to ARPA stack (Live ID, Legacy, Rooms, …) |
| Conformance (Job A) | Runtime ⊆ declared manifest + sequencer order |
| Audit trail | Live append-only session log; code: audit spine / AuraEvent stream |
| Session export | Closed-session deliverable — JSONL + conformance summary JSON |
| Constitution | Rules, guardrails, constraints — what the run must obey |
| Tools | Skills, MCP, APIs, bundles — capability surface (adapter) |
| Audit (Job B) | Full causal log of session — same as audit trail |
| Envelope | Outer ring — identity, trust, Legacy export |
| Field | Parallel services on event stream |
| Hook pipeline | pre/post interception stages |
| Live ID | Permanent accountable identity (UBH) |
| Logical Systems | Brain — models, APIs, agents; rented not owned |
| Manifest | Same as Aura Manifest |
| Middleware stack | Ordered ops per step or model request |
| Operation (op) | Pluggable handler — audit, limit, firewall, … |
| SCI | Self-Centered Intelligence — agents reasoning from own center within constitution |
| Sequencer | Ordered prescriptive step pipeline inside session (v0.2) |
| Session ID | One runtime activation |
| Soma | Body / host while running |
| SoulSig | Birth contract on Live ID |
| Spectrum | See Aura Spectrum |
| Capability | Named intent on profile.capabilities[] — scope check + secret ref, not a live credential |
| SecretBroker | Resolves a capability secret ref at egress after policy passes; never stored on the profile |
| Trust tier | ephemeral · unverified · verified_live_id |
| Type | Registered plugin kind — arpa.brain.gemini, etc. |
| UBH | Ultimate Beneficiary Human |