# Module Layout

**Language**: csharp
**Layout Convention**: solution-flat (legacy — pre-`src/` convention)
**Root**: `./` (csproj folders sit at workspace root)
**Last Updated**: 2026-05-14 *(cycle 2 Auth Modernization AZ-531..AZ-538; cycle-2 hotfix AZ-552..AZ-557 added `scripts/`, `secrets/`, `env/`, `.env.example` to Admin API Owns)*

## Layout Rules

1. This admin/ workspace is one **deployable** (the `Azaion.AdminApi` HTTP service) split across three production csproj projects + one e2e test csproj: `Azaion.AdminApi`, `Azaion.Services`, `Azaion.Common`, `e2e/Azaion.E2E`. (The `Azaion.Test` unit-test project was removed in cycle 2 once its only test class — `SecurityTest.cs` — was deleted along with the encrypted-download stack; no in-process unit tests remain.)
2. Existing task specs (`_docs/02_tasks/*/AZ-*.md`) all use `Component: Admin API` as a single coarse identifier covering this entire workspace. The Per-Component Mapping below honors that convention rather than rewriting every task spec.
3. The conceptual sub-components documented in `_docs/02_document/components/01_data_layer..05_admin_api/` are **read-time** documentation aids, not write-time ownership boundaries. They are listed under "Conceptual Sub-Components" below for reference only.
4. Public API surface = the namespaces / interfaces exposed across csproj boundaries (`I*Service` interfaces in `Azaion.Services`, request DTOs in `Azaion.Common/Requests/`, entities in `Azaion.Common/Entities/`).
5. Tests live in `e2e/Azaion.E2E/` (HTTP black-box). Production code never imports from there.

## Per-Component Mapping

### Component: Admin API

- **Epic**: AZ-181 (and any other admin-API epic, e.g. AZ-509 for the Detection Classes feature)
- **Directory**: workspace root (multi-csproj, see below)
- **Owns (exclusive write during implementation)**:
  - `Azaion.AdminApi/**`
  - `Azaion.Services/**`
  - `Azaion.Common/**`
  - `e2e/Azaion.E2E/**` (xUnit/HttpClient-based black-box tests)
  - `e2e/db-init/**` (test-DB seed/init scripts consumed by the e2e harness)
  - `docker-compose.test.yml`
  - `scripts/**` (deploy / lifecycle bash helpers — workspace-root infra)
  - `secrets/**` (sops + age handover, public env overlays, jwt-keys host dir)
  - `env/**` (DB schema/install scripts, dev convenience env setters)
  - `.env.example` (operator-facing runtime env template)
- **Public API** (visible to other csprojs within the workspace):
  - `Azaion.Services/I*Service.cs` interfaces (UserService, AuthService, ResourcesService, …)
  - `Azaion.Services/Security.cs`, `Azaion.Services/Cache.cs` (used by `Azaion.AdminApi/Program.cs`)
  - `Azaion.Common/Requests/*` request DTOs
  - `Azaion.Common/Entities/*` linq2db entities
  - `Azaion.Common/Database/*` `IDbFactory` + connection helpers
  - `Azaion.Common/Configs/*` strongly-typed config records
  - `Azaion.Common/Extensions/*` extension methods
  - `Azaion.Common/BusinessException.cs`
  - `Azaion.AdminApi/Program.cs` (composition root + minimal-API endpoints)
  - `Azaion.AdminApi/BusinessExceptionHandler.cs`
- **Internal (do NOT import across csproj boundaries)**:
  - private/internal members within each csproj (default C# visibility rules apply)
  - `Azaion.AdminApi/appsettings*.json` (loaded by the host, not imported)
  - `e2e/Azaion.E2E/Helpers/*` (test-only helpers, never imported by production)
- **Imports from**: (none — this is the only deployable in the workspace; the Loader is architecturally retired per `suite/_docs/_repo-config.yaml` `unresolved:loader-retirement-arch-doc`)
- **Consumed by**: HTTP clients (UI workspace, edge services on secured Jetson, SaaS browser sessions) — out of process

## Conceptual Sub-Components (documentation only — NOT ownership boundaries)

These come from `_docs/02_document/components/` and exist for reading the codebase, not for assigning task ownership. A single task may legitimately touch multiple sub-components within the `Admin API` umbrella.

| # | Sub-component        | Primary file locations |
|---|----------------------|------------------------|
| 1 | Data Layer           | `Azaion.Common/Database/`, `Azaion.Common/Configs/` (incl. cycle-2 `AuthConfig.cs` + `JwtConfig.cs` rebuilt for ES256 + new `SessionConfig`), `Azaion.Common/Entities/` (incl. cycle-1 `DetectionClass.cs`; cycle-2 `Session.cs` + `AuditEvent.cs`; `User.cs` extended with lockout + MFA columns; `RoleEnum.cs` + `Service = 60`) |
| 2 | User Management      | `Azaion.Services/UserService.cs` (cycle-2 — Argon2id verify/hash + lazy migration + lockout + per-account rate-limit checks; new dependencies on `IAuditLog`, `IOptions<AuthConfig>`), `Azaion.Common/Requests/Register{User,DeviceResponse}.cs`, `LoginRequest.cs`, `LoginResponse.cs` *(new — AZ-531)*, `MfaRequests.cs` *(new — AZ-534)*, `MissionSessionRequest.cs` *(new — AZ-533)*, `SetUserQueueOffsetsRequest.cs` |
| 3 | Auth & Security      | `Azaion.Services/AuthService.cs` (cycle-2 — ES256 + `AccessToken` record + sid/jti/amr claims), `Azaion.Services/Security.cs` (cycle-2 — Argon2id `HashPassword`/`VerifyPassword`; `ToHash` deleted), `Azaion.Services/RefreshTokenService.cs` *(new — AZ-531)*, `Azaion.Services/SessionService.cs` *(new — AZ-535)*, `Azaion.Services/MfaService.cs` *(new — AZ-534)*, `Azaion.Services/MissionTokenService.cs` *(new — AZ-533)*, `Azaion.Services/JwtSigningKeyProvider.cs` *(new — AZ-532)*, `Azaion.Services/AuditLog.cs` *(new — AZ-537)*, `Azaion.Services/Cache.cs` |
| 4 | Resource Management  | `Azaion.Services/ResourcesService.cs` (`GetResourceRequest.cs` removed in cycle 2 with `POST /resources/get`; `SetHWRequest.cs` removed by AZ-197; `ResourceUpdateService.cs` + `GetUpdateRequest.cs` + `PublishResourceRequest.cs` removed when AZ-183 was reverted) |
| 4b | Detection Classes    | `Azaion.Services/DetectionClassService.cs` + `Azaion.Common/Requests/{Create,Update}DetectionClassRequest.cs` (added cycle 1 / AZ-513) |
| 5 | Admin API (HTTP)     | `Azaion.AdminApi/Program.cs` (cycle-2 — significantly expanded: HSTS / HTTPS redirect, RateLimiter, DataProtection, eight new endpoints, `IssueDualTokens` + `ParseSidClaim`/`ParseUserIdClaim` helpers), `Azaion.AdminApi/BusinessExceptionHandler.cs` (cycle-2 — per-enum status mapping + `Retry-After` header), `Azaion.AdminApi/appsettings*.json` |

## Allowed Dependencies (csproj layering)

| Layer | csproj | May reference |
|-------|--------|---------------|
| 4. Entry / Host | `Azaion.AdminApi` | `Azaion.Services`, `Azaion.Common` |
| 3. Application  | `Azaion.Services` | `Azaion.Common` |
| 2. Foundation   | `Azaion.Common`   | (none) |
| —. Tests (out-of-process e2e) | `e2e/Azaion.E2E` | (none from production csprojs — HTTP only) |

A reference from a lower production layer to a higher production layer is an **Architecture** finding (High severity) in `/code-review` Phase 7. Test projects may reference any production csproj; production csprojs may NOT reference test projects.

## Layout Conventions (reference)

| Language | Root | Per-component path | Public API file | Test path |
|----------|------|-------------------|-----------------|-----------|
| C# (.NET) | `./` (this workspace, legacy flat layout) | `./<Csproj>/` | namespace-root types in each csproj | `e2e/Azaion.E2E/` |

## Notes

- This file was authored 2026-05-13 by `/autodev` Step 10 to satisfy `/implement` Step 4. The `_docs/` artifact set predates the Step 1.5 module-layout addition, so this is a **backfill** rather than a fresh decompose Step 1.5 run.
- If the project later splits into multiple deployables (e.g. carving out `Azaion.AnnotationsApi`), re-run `/decompose` Step 1.5 to produce a finer-grained mapping.