# AEGIS — Implementation Readiness Report

- **Document ID:** ARCH-59
- **Phase:** Report — Implementation Kickoff Reference
- **Status:** Proposed — awaiting Owner sign-off following ARCH-58 Freeze approval
- **Version:** 0.1
- **Date:** 2026-07-10
- **Owner:** Chief Security Architect
- **Depends on:** ARCH-01 through ARCH-58

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## 1. Purpose

Summarize the state of the AEGIS architecture at Freeze and provide the implementation team with the official starting point: the remaining risks, known limitations, architecture debt, verification coverage, recommended implementation order, and recommended security priorities. This document is the handoff from architecture into implementation.

## 2. Executive Summary

- **Corpus:** 57 ARCH-* documents + supplementary memory + CLAUDE.md constitution. ~55,000+ words of reviewed, four-reviewer-disciplined architecture.
- **Scope:** v0-GA delivers a six-capability Security Brain (Log Collection, Normalization, Correlation, AI Recommendations, Timeline, Audit) on 15 engines mediated by a Security Kernel, with Recovery Domain isolation, capability-based security, and multi-stage decision pipeline.
- **Assurance target v0-GA:** Level 3 (Continuous) for critical subsystems; roadmap to Level 5 (Critical) by v3 (year 5).
- **Deployment matrix:** 7 reference topologies (VPS through hosted MSSP).
- **Governance:** ADR process, five-gate Security Design Review, four-reviewer discipline, Debt Register, Architecture Health Metrics, Trust Score.
- **Freeze status:** ARCH-58 recommends approval subject to Owner + Auditor + CSA ceremony.

## 3. Remaining Risks

Ordered by consequence:

### 3.1 Architectural Risks (residual, accepted)

- **R-1. Prompt-injection through ingested content** (ARCH-03 P-1). Structural mitigations in place (Safety Layer, Multi-Engine Adjudication, evidence citation); residual accepted; monitored via Continuous Adversarial Validation.
- **R-2. Kernel formal-verification gap.** TLA+ on Capability Directory scheduled for v1; v0-GA relies on property tests + Watchdog Quorum.
- **R-3. Model provenance for L2.** Canary evals + provenance verification + multi-model consensus in place; residual accepted for L2 open-weights.
- **R-4. Classical-crypto horizon.** PQC hybrid piloted post-v0-GA; long-lived audit archival is the highest-priority migration target.
- **R-5. MSSP hosted multi-tenant complexity.** Deferred to v2; extensive drills before GA.

### 3.2 Operational Risks

- **R-6. On-call sustainability at team scale.** Rotation modelling documented; regional rotation deferred to v2.
- **R-7. Ceremony discipline decay.** Rehearsals + Auditor + metrics + external audit annual.
- **R-8. Verification Matrix population.** Framework complete; per-subsystem rows populated during implementation.

### 3.3 Adversarial Risks

- **R-9. Novel attacker classes not yet modeled.** Living-Threat-Model discipline compensates.
- **R-10. Supply-chain compromise horizon.** Two-CI reproducibility + SLSA-3+ + hash pinning + transparency log; residual accepted.

## 4. Known Limitations

- **L-1. v0-GA scope narrow.** Six capabilities only; deferred: Dashboard, Asset Inventory, Config Review, Risk Scoring, Threat-Intel Correlation, Response Engine execution.
- **L-2. IdP protocols in v0.** OIDC only; SAML + SCIM at v1.
- **L-3. No endpoint agent in v0.** Log-source ingestion via forwarders only.
- **L-4. Plugin runtime interface-only in v0.** Full runtime v0.2.
- **L-5. Air-gap topology has L1 + L2 AI only.** L3 forbidden by design.
- **L-6. Multi-tenant hosted deferred to v1+.** v0 is single-tenant self-hosted.
- **L-7. Response Engine defined but not executing.** Advisory-only through v1.

## 5. Architecture Debt

Full Debt Register in ARCH-29. v0-GA entries:

| ID | Description | Owner | Target | Mitigation |
|---|---|---|---|---|
| D-K-01 | Kernel L3 vs. L5 target | Kernel team | v1 | Formal methods + expanded property tests |
| D-C-01 | Crypto L3 vs. L5 target | Crypto team | v1.x | PQC hybrid when libraries production-ready |
| D-A-01 | AI Safety canary corpus size | Safety team | v0.2 | Grow with operational data + red-team |
| D-R-01 | Risk Engine conservative weights (prefer FP over FN) | Risk team | v1 | Operate + measure + refine |
| D-P-01 | Plugin runtime v0.2+ | Plugin team | v0.2 | Wasm runtime + governance |
| D-O-01 | SAML/SCIM v1 | Identity team | v1 | Post-v0 delivery |
| D-D-01 | R-2 Docker Compose minimal coverage | Ops | v1 | Post-v0 expansion |
| D-D-02 | MSSP hosted (R-7) deferred | Product | v2 | v1 pilot planning |
| D-S-01 | Formal methods post-v0 | Kernel + Cap teams | v1 | Pilot on Capability Directory |
| D-O-02 | OIDC-only excludes SAML enterprises | Identity | v1 | v1 delivery |

## 6. Verification Coverage at Freeze

- **Verification Strategy** framework complete (ARCH-27 + ARCH-37).
- **Verification Matrix** schema defined; rows populated during IRA + implementation.
- **Property tests** — 5 Golden Invariants specified (capability attenuation, classification propagation, hash-chain monotonicity, revocation propagation, redaction correctness); to be authored during implementation.
- **Threat Simulation Framework** — scenarios library structure defined (ARCH-39); initial corpus authored during implementation.
- **CAV Runner** — designed (ARCH-50); implemented during implementation.
- **Formal Verification** — Candidate register with 8 candidates + priority ranking (ARCH-40); pilots begin post-v0.
- **External Audit** — annual cadence set (ARCH-23); first audit at v0-GA.

## 7. Recommended Implementation Order

Phased, security-first sequencing over ~12 months to v0-GA:

### Phase 1 (weeks 1–8): Foundations
- Security Kernel core (identity, capability broker, audit gateway, integrity beacons).
- Cryptographic Identity substrate (SPIFFE-shape, Ed25519, signing hierarchies).
- Root of Trust ceremony infrastructure (Z0).
- Storage Engine facade over PostgreSQL + ClickHouse.
- Boundary contract enforcement pattern (Kernel-mediated calls).
- CI/CD pipeline + two-CI reproducibility + signing hierarchy.

### Phase 2 (weeks 9–16): Ingest + Audit
- Connector Engine (syslog + HTTPS push).
- Normalization Engine (OCSF baseline).
- Immutable Event Sourcing storage patterns.
- Layer-A hash-chain audit path.
- Layer-B batch archival + signing.
- Watchdog Quorum framework (4 watchdogs).

### Phase 3 (weeks 17–24): Detection + Cases
- Detection Engine (Sigma).
- Case Engine (findings → cases → timelines).
- Evidence Engine (provenance + confidence).
- Policy Engine (OPA/Rego).
- Basic Next.js UI (case + timeline views).

### Phase 4 (weeks 25–32): AI + Safety Layer
- AI Engine (three-tier router).
- Provider adapters (Qwen local + Claude/GPT/Gemini hosted).
- AI Safety Layer (8 deterministic validators).
- Multi-Stage Decision Pipeline (11 stages).
- Runtime Risk Engine.
- Redaction pipeline.

### Phase 5 (weeks 33–40): Recovery + Operations
- Recovery Engine + Recovery Domain.
- Backup/restore + immutable + air-gap copies.
- Metrics collection (ARCH-24 catalog).
- Observability dashboards.
- Runbooks + on-call setup.
- Reference deployment R-3 (Kubernetes small).

### Phase 6 (weeks 41–48): Assurance + v0-GA
- Verification Matrix populated per subsystem IRA.
- Property tests for all 5 Golden Invariants.
- CAV Runner online.
- Threat Simulation library initial corpus.
- First external red-team engagement.
- First external audit.
- v0-GA preparation + Release Certification.
- Retrofit ADRs published.

## 8. Recommended Security Priorities

Build security *ahead of* capability — the opposite of typical product development:

1. **Kernel + Cryptographic Identity + Capability Model FIRST** — foundation for every downstream security property.
2. **Immutable Event Sourcing + Audit Chain SECOND** — evidence is preserved before anything else runs on it.
3. **Storage Engine with tenant scoping THIRD** — data isolation is structural before use.
4. **Boundary contracts + Kernel mediation FOURTH** — enforced pattern before adding engines that rely on it.
5. **AI Safety Layer BEFORE AI Engine value features** — safety before capability, always.
6. **Recovery Domain + backups EARLY** — resilience before scale.
7. **Watchdog Quorum in parallel with Kernel** — integrity monitoring co-develops with Kernel.
8. **Verification instruments continuously** — Property tests + CAV + Threat Simulation grow alongside every implementation phase, never at the end.

## 9. Governance for Implementation

- Every subsystem's implementation begins with an approved IRA (ARCH-53).
- Every architectural decision during implementation is an ADR.
- Every release passes the Certification Checklist (ARCH-54).
- Every deployment passes the ORR (ARCH-56).
- Debt Register updated continuously.
- Weekly ops review; monthly council; quarterly assurance-roadmap review; annual full architecture review.

## 10. Sign-off

The Chief Security Architect certifies that this report accurately summarizes the state of the AEGIS architecture at freeze; that the identified risks, limitations, and debt are complete and honestly stated; and that the recommended sequencing is designed to build security into the platform from the first line of code.

**Recommendation:** approve this report + ARCH-58 Freeze → implementation begins.

## 11. Future Risks / Known Limitations / Out-of-Scope / Retirement

- **Future Risks.** Implementation may reveal architectural gaps; ADR process absorbs.
- **Known Limitations.** Snapshot at freeze; state evolves.
- **Out-of-Scope.** Detailed engineering plans (owned by implementation team).
- **Retirement Conditions.** Report is one-time; supplanted by ongoing Continuous Architecture Review.

## 12. Change Log

- **0.1 (2026-07-10)** — Initial draft; awaiting Freeze approval.

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**Signature block (to be completed on approval):**
- Chief Security Architect: __________________
- Platform Architect: __________________
- Owner: __________________
- Auditor: __________________
- Report accepted on: __________________
- Implementation may begin as of: __________________