slp-modular-cms/aidlc-docs/features/gitea-deployment-workflow/audit.md

# Audit Log — Gitea Deployment Workflow

## Initial Request

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Ik wil een Gitea workflow gaan opzetten om de CMS te kunnen deployen. In de instructies moet ook behandeld worden waar de frontend van de website moet gaan komen, maar de workflow voor de website zelf zal hierin niet worden gebouwd, datwordt per werbsite in hun eigen workspace gedaan. Gebruik de aidlc workflow om alles op te zetten. Voor Uptime gebruik ik UptimeRobot, voor analytics gebruik ik Umami en voor logging console logs samen met Sentry. Ik heb in de workspace `K:\Development\SlpSoftware\Projects\SlpSoftware` al een werkende workflow. Dit is voor een react vite front-end, maar is een goed startpunt voor deze workspace. Op dit moment zijn er alleen een lokale omgeving, test en productie. Het doel van deze workflow en eventuele deployment-opzet is dat we boel moeten kunnen uploaden als een .NET-applicatie en dat we geen server-configuratie hoeven te doen omdat dat voor andere websites waarschijnlijk niet kan. Vandaar dat ik een opzet wilde met de api en de 2 frontends als 1 website."

**AI Response**: "Started AI-DLC workflow. Loaded common rules and extension opt-in files. Performed workspace scan and reference-workspace analysis. Presented feature resolution, language preference, reverse-engineering staleness handling, and public-website scope questions in `aidlc-docs/feature-selection.md`."

**Context**: INCEPTION — Workspace Detection. Multi-feature workspace detected (`active-features.md` exists, 5 existing features). Request does not match any existing feature; proposed new feature `gitea-deployment-workflow`.

---

## Workspace Detection — Findings

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated analysis step)"

**AI Response**: "Recorded workspace state and reference-workflow analysis."

**Context**: INCEPTION — Workspace Detection

### Workspace State
- **Existing Code**: Yes
- **Programming Languages**: C# (.NET 10), TypeScript/React
- **Build System**: MSBuild / `dotnet` (solution `SlpModularCms.sln`); pnpm + Vite for `frontend/`
- **Project Structure**: Modular monolith — `src/SlpModularCms.Api` (host), `src/SlpModularCms.Api.Slave`, `src/SlpModularCms.Core`, `src/SlpModularCms.Modules.{Master,Identity,Availability}` plus mirrored test projects; `frontend/` admin SPA outside `src/`
- **Workspace Root**: `K:\Development\Projects\SlpModularCms`
- **Project Type**: Brownfield
- **Git Branch**: `master`
- **CI/CD present**: No `.gitea/` directory exists in this repo yet

### Reverse Engineering Artifact Status
- Artifacts exist in `aidlc-docs/_shared/reverse-engineering/` (8 files), dated **2026-06-16T20:30:00Z**
- Assessed as **stale**: commits after that date changed deployment-relevant structure — `master-cms-module`, `local-dev-master-slave-setup`, solution reorganization (`754bd97`), and single-host serving (`3885703`)
- Staleness handling deferred to the user via Question 3 in `feature-selection.md`

### Reference Workflow Analysis (`K:\Development\SlpSoftware\Projects\SlpSoftware`)
Existing, working Gitea Actions setup for a React/Vite frontend — to be used as the starting point for this feature:

- `.gitea/workflows/continuous_integration.yaml` — triggers on `pull_request`, `push` to `master`, and `workflow_dispatch` (with a `deploy_production` boolean input). Jobs: `config` (re-exports `env:` values as job outputs so they are usable in a reusable workflow's `with:` block), `prepare`, `build` (test env), `build-production` (separate build because `VITE_APP_ENV` is build-time), `test` (lint + unit tests), `deploy-test`, `deploy-production`.
- `.gitea/workflows/deploy.yaml` — reusable `workflow_call` workflow taking `artifact_name`, `environment`, `deploy_path`; downloads the artifact and uploads it over SCP using `sshpass` in a plain shell step (the `appleboy/scp-action` container action fails on the Podman-backed runner with a 409 attach error).
- Configuration split: non-secret values (Umami script URL / website IDs per environment, Sentry DSN) as Gitea Actions **variables**; SSH credentials as **secrets**.
- Operations artifacts under `aidlc-docs/features/react-frontend/operations/` include `deployment-instructions.md`, `deployment-plan.md`, `rollback-plan.md`, nginx example configs, Umami podman-compose setup, `monitoring-plan.md`, `monitoring-setup.md`, `umami-setup.md`, and a `production-readiness-checklist.md`.

### Key Difference From The Reference
The reference deploys a **static `dist/` folder** to an nginx webroot on self-hosted Raspberry Pis. This feature must instead deploy a **published .NET application** to shared hosting with **no server configuration possible**, which is why the API serves the public website (`/`), the admin SPA (`/admin`), and the API (`/api/v1`) from a single host process.

---

## Workspace Detection — Feature Resolution Answers

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "klaar, antwoorden staan in het bestand" — answers recorded in `aidlc-docs/feature-selection.md`: Q1 = "A, maak ook een nieuwe feature-branch aan voor deze feature.", Q2 = "A", Q3 = "B", Q4 = "A"

**AI Response**: "Validated answers — no contradictions or ambiguities detected. Created git branch `feature/gitea-deployment-workflow`, created `aidlc-state.md` for the feature, and registered the feature in `aidlc-docs/active-features.md` with status 🔵 Inception. Proceeding to Reverse Engineering (full rerun)."

**Context**: INCEPTION — Workspace Detection complete. Decisions: (1) new feature `gitea-deployment-workflow` on its own feature branch; (2) Documentation Language = English, Conversation Language = Dutch; (3) full reverse engineering rerun of all 8 `_shared/` artifacts; (4) public website handled as documentation/instructions only — its build/deploy workflow stays out of scope.

---

## Conflict Detection

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated analysis step)"

**AI Response**: "Compared affected components against other non-complete features."

**Context**: INCEPTION — Workspace Detection. One other active feature: `tech-debt-backlog` (🔵 Inception), affecting `Modules.Master` and `Frontend`. Overlap with this feature is limited to `Frontend` (this feature only touches its build/deploy configuration, not its source). Informational only — does not block progress; developer handles at merge time.

---

## Reverse Engineering — Start

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — stage entered automatically after Workspace Detection)"

**AI Response**: "Loaded `inception/reverse-engineering.md`. Started full rerun of all 8 shared artifacts per the user's Q3 = B decision."

**Context**: INCEPTION — Reverse Engineering. Full rerun, not a targeted refresh.

---

## Reverse Engineering — Complete

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated analysis and generation)"

**AI Response**: "Regenerated all 8 artifacts plus the timestamp file in `aidlc-docs/_shared/reverse-engineering/`. Updated the feature's `aidlc-state.md` with Reverse Engineering Status. Presented the completion message and awaiting explicit approval."

**Context**: INCEPTION — Reverse Engineering complete.

### Scope of analysis
122 C# files (excluding `bin`/`obj`) and 111 TypeScript/TSX files under `frontend/src`, plus solution, project, configuration and lock files.

### Verification performed by execution (not inferred)
- `dotnet build SlpModularCms.sln -c Release` — 0 errors, 50 warnings
- `dotnet test SlpModularCms.sln -c Release` — 219 tests: Core 54, Identity 37, Availability 78, Master 50; all passed
- `cd frontend && pnpm test` — 34 files, 213 tests, all passed
- `cd frontend && pnpm run lint` — **FAILS**: 5 errors, 1 warning
- `dotnet list package --vulnerable --include-transitive` — `Microsoft.OpenApi` 2.0.0 (High), `System.Security.Cryptography.Xml` 10.0.9 (High)

### Key deployment-relevant findings
1. No CI/CD exists — the repository has no `.gitea/workflows/`.
2. `dotnet publish` on `SlpModularCms.Api` requires Node and pnpm: the `BuildAndCopyAdminFrontend` target runs `pnpm install --frozen-lockfile` and `pnpm build` before publish.
3. The admin SPA bundle is environment-specific — `frontend/src/lib/config.ts` requires `VITE_API_BASE_URL` as an absolute URL, so test and production cannot share one artifact unless a same-origin default is introduced.
4. No health-check endpoint exists for uptime monitoring; the three anonymous candidates (`/api/v1/Availability/status`, `/api/v1/System/capabilities`, `/`) each prove something different, and only `capabilities` goes red when an instance is deliberately disabled.
5. The public website at `/` is not behind the availability gate — static files short-circuit before `AvailabilityMiddleware` is installed.
6. `ModuleOrchestrator` discovers modules by globbing `SlpModularCms.Modules.*.dll` in the app base directory, so deployment content determines capability; load failures are logged, not fatal.
7. Data Protection uses the default file-system key ring with no persistent store — a redeploy that discards it makes stored slave API keys unreadable.
8. No forwarded-headers middleware while `UseHttpsRedirection()` runs early — relevant behind a hosting provider's TLS-terminating proxy.
9. `ApplicationDbContext` migrations are never applied automatically, while both module contexts self-migrate at startup.
10. No `Test` environment configuration exists (`appsettings.Test.json` absent, no `ASPNETCORE_ENVIRONMENT` value defined for test).
11. Observability is entirely greenfield — no Sentry, Umami, structured logging, metrics or tracing anywhere. Production log level is `Warning`.
12. No `packages.lock.json` for any .NET project, so NuGet restore is not reproducible (the frontend is locked via `pnpm-lock.yaml`).
13. `AvailabilityMiddleware.IsAdminBypass` reads the JWT without validating its signature, so the availability gate is bypassable by an unauthenticated caller (not a privilege escalation — protected endpoints still authenticate).

---

## Reverse Engineering — Change Requested

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "De availability is geen health check. Die zou dan nog apart moeten worden ingeregeld. De availabillity en capabilities is functionaliteit van de CMS zelf en/of tussen slave en master."

**AI Response**: "Correction accepted and applied. The earlier framing of `/api/v1/Availability/status` and `/api/v1/System/capabilities` as candidate monitoring endpoints was wrong. Both are CMS domain functionality — availability is the product's own on/off state (local switch plus master gate) and capabilities reports loaded modules; both also serve the master↔slave protocol. Neither reflects application health and neither may be repurposed for monitoring. Updated `api-documentation.md` (§ Observability endpoints rewritten), `architecture.md` (deployment-relevant observation 4) and `code-quality-assessment.md` (technical-debt item 4) to state that a dedicated health check is a separate concern still to be designed: its own endpoint, outside `/api/v1` domain routing and outside the availability gate, reporting infrastructure liveness (process up, database reachable, migrations applied) rather than product state."

**Context**: INCEPTION — Reverse Engineering. Supersedes deployment-relevant finding 4 as originally logged in the "Reverse Engineering — Complete" entry above. Carried forward as a requirement for the Operations phase: a health-check endpoint must be built for UptimeRobot rather than reusing domain endpoints.

---

## Reverse Engineering — Scope Addition: Health Check Endpoint

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Is er in .NET niet iets simpels om health checks toe te toevegen? Iets van AddHealthChecks()? Als het zo simpel is mag het erbij omdat het wel kan helpen bij deze feature. Anders wordt dat los opgepakt"

**AI Response**: "Confirmed it is that simple, and verified package availability. `builder.Services.AddHealthChecks()` and `app.MapHealthChecks(\"/health\")` require NO package — both are in the ASP.NET Core shared framework; default response is plain text `Healthy`/200 or `Unhealthy`/503, which is directly consumable by UptimeRobot. A database probe costs one package, `Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore` 10.0.9 (verified available on nuget.org and in line with the existing 10.0.x dependencies), plus `.AddDbContextCheck<ApplicationDbContext>()`, which does `CanConnectAsync` by default and can optionally report pending migrations — extra valuable here because `ApplicationDbContext` never migrates automatically. Flagged one codebase-specific requirement: `MapHealthChecks` registers an endpoint and middleware runs first, so `AvailabilityMiddleware` would return 503 for `/health` on a switched-off instance — reproducing exactly the conflation the user corrected. `/health` must therefore be added to `AvailabilityMiddleware._bypassPrefixes`. Recorded as in scope in `aidlc-state.md` and updated `api-documentation.md` and `code-quality-assessment.md` accordingly."

**Context**: INCEPTION — Reverse Engineering. Scope decision: a dedicated health-check endpoint is IN SCOPE for this feature (rather than being picked up separately). Separation of concerns is explicit: `/health` reports infrastructure liveness; Availability and capabilities remain CMS domain functionality and are never used for monitoring.

---

## Reverse Engineering — Approved

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Continue to Next Stage"

**AI Response**: "Reverse Engineering approved. Marked complete in `aidlc-state.md` and proceeded to Requirements Analysis."

**Context**: INCEPTION — Reverse Engineering approved, including the health-check scope addition and the availability/capabilities correction.

---

## Requirements Analysis — Intent Analysis

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated analysis step)"

**AI Response**: "Loaded architecture.md, component-inventory.md and technology-stack.md from `_shared/reverse-engineering/`, plus the reference project's operations artifacts (deployment-plan.md, monitoring-plan.md) at `K:\Development\SlpSoftware\Projects\SlpSoftware\aidlc-docs\features\react-frontend\operations\`. Performed intent analysis and generated 25 clarifying questions."

**Context**: INCEPTION — Requirements Analysis, Steps 1–6.

### Intent Analysis
- **Request Clarity**: Clear on goals and tooling choices, incomplete on hosting/transport specifics — the user named the target stack (Gitea Actions, UptimeRobot, Umami, Sentry + console logging), the environments (local/test/production), the reference implementation, and the core constraint (upload as a .NET application, no server configuration possible). What is not yet specified is how the shared host is reached, how migrations and configuration are delivered, and how the public website's `wwwroot` content is protected from the CMS deploy.
- **Request Type**: New Feature (CI/CD and operational tooling), with supporting Enhancement work in the application itself (health-check endpoint, and candidate changes for frontend config, Data Protection key ring, and migration strategy).
- **Initial Scope Estimate**: Multiple Components — new `.gitea/workflows/` definitions, changes to `SlpModularCms.Api` (health checks, bypass list, possibly key ring and migrations), possibly `frontend/src/lib/config.ts`, new `appsettings.Test.json`, plus documentation and operations artifacts.
- **Initial Complexity Estimate**: Moderate-to-Complex. Not algorithmically hard, but the constraint set is unusually tight: one host process serving three surfaces, a customer-owned `wwwroot` that must survive deploys, shared hosting with no server configuration, self-migrating module contexts alongside a manually-migrated Core context, and an environment-specific frontend bundle.
- **Requirements Depth**: **Comprehensive** — justified by the number of interacting constraints, the deployment risk (a wrong `wwwroot` sync destroys a customer's website; a lost Data Protection key ring silently breaks master↔slave), and the fact that several findings require explicit product decisions rather than defaults.

### Notable reference-project context loaded
- Deploy transport in the reference is `scp` + `sshpass` in a plain shell step, because container-based actions fail on the Podman-backed self-hosted runner with a 409 attach error. Shared hosting is unlikely to offer SSH, so transport is an open question here.
- The reference deliberately splits test (automatic on `master`) from production (manual `workflow_dispatch` with a `deploy_production` checkbox), and builds twice because `VITE_APP_ENV` is build-time.
- The reference uses one Sentry project with environment tags, a self-hosted Umami on `analytics.slpsoftware.nl` with per-environment website IDs, and UptimeRobot for uptime.

### Questions generated
25 questions in `inception/requirements/requirement-verification-questions.md`, grouped: A hosting/transport (3), B public website in `wwwroot` (2), C workflow setup and gates (4), D database and configuration (4), E monitoring and observability (7), F rollback and reliability (2), G extensions and phasing (3 — security opt-in, PBT opt-in, Operations phase inclusion).

---

## Requirements Analysis — Answers Received, Clarification Round Opened

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "klaar, antwoorden staan in het bestand" — answers recorded in `inception/requirements/requirement-verification-questions.md`: Q1 = "X, Op de pi kan ik met FileZilla ook verbinden met SFTP. Is dat voldoende om FTP als uitgangspunt te nemen? Anders beginnen met opzetten zoals de referentie met SSH/SCP en later aanpassen naar FTPS als dat nodig is.", Q2 = B, Q3 = B, Q4 = "C, noem de map \"web\" in plaats van \"site\", Dus dan krijgen we uiteindelijk 3 mappen in wwwroot: admin, web en eventueel een map voor de API (indien nodig).", Q5 = B, Q6 = A, Q7 = A, Q8 = A, Q9 = "A, B, C, D, E", Q10 = C, Q11 = "X, Het mag naar same-origin, maar de frontend kan ook een aparte test-build hebben net als de referentie website. Ook is het zo dat nu lokaal wel een url moet worden opgegeven. Als dat verder ook blijft werken hoeft de url variabele niet blokkerend te zijn voor een enkele bundel", Q12 = A, Q13 = A, Q14 = A, Q15 = A, Q16 = C, Q17 = A, Q18 = C, Q19 = A, Q20 = B, Q21 = C, Q22 = A, Security extension = A, PBT extension = C, Operations phase = A.

**AI Response**: "Loaded the security-baseline extension rules (opted in). Validated all answers and detected one direct question from the user plus three genuine conflicts; opened a clarification round in `inception/requirements/requirement-clarification-questions.md` with 5 questions."

**Context**: INCEPTION — Requirements Analysis, Step 6 contradiction/ambiguity analysis.

### Extension configuration decided
- Security Baseline: **Enabled** (blocking) — full rules file loaded.
- Property-Based Testing: **Disabled** — rules file deliberately not loaded.
- Operations Phase: **Yes**, decided at Requirements Analysis.

### Contradictions and ambiguities detected
1. **Q1 answered about the wrong environment, plus a protocol misconception.** The user asked whether FileZilla connecting over SFTP means FTP can be the baseline. It does not: SFTP is file transfer inside an SSH session (proving SSH/SCP works, exactly the reference approach), whereas FTPS is a separate protocol needing its own server. More importantly, Q1 asked about **production** but the answer describes the Pi, which Q2 assigns to **test**. Commit `3885703` cites shared hosting (mijnhostingpartner.nl) as the reason for single-host serving, so where production actually runs is unresolved.
2. **Q11 (single bundle) contradicts Q14/Q15/Q20 (build-time environment tagging).** Same-origin API URL is implementable, but Sentry's `environment` tag and Umami's per-environment website ID are Vite build-time values, so one `dist/` cannot serve both test and production — the very reason the reference project has a separate `build-production` job. Either two builds are accepted or the environment config must become runtime-delivered.
3. **Q22 (`app_offline.htm`) is inapplicable to Q2's chosen test environment.** `app_offline.htm` is an IIS ASP.NET Core Module feature; on the Pi the app runs as a Kestrel process (nginx + systemd), where the file is ignored and an upload would overwrite DLLs of a live process. Also noted: any clean stop takes the public website in `wwwroot/web/` offline too, even though it is unrelated to the CMS deploy.
4. **Blocking security rules expand scope beyond the workflow** (raised for an explicit decision rather than silently expanding or skipping): SECURITY-04 requires HTTP security headers, of which the app currently sets none — and because server configuration is explicitly unavailable, they must be app middleware; a CSP additionally constrains the externally-owned public website and needs explicit exceptions for Umami and Sentry. SECURITY-14 requires alerting plus 90-day log retention, which conflicts with Sentry's free-plan 30-day event retention chosen in Q16.

### Answers accepted without conflict (noted for the requirements document)
- Q4 = C with the folder named **`web`**, not `site` — final `wwwroot` layout: `admin/`, `web/`, and optionally an API folder if needed. This resolves the `wwwroot` destruction risk structurally rather than by exclusion lists.
- Q10 = C (auto-migrate `ApplicationDbContext` at startup) sits consistently with Q17 = A (liveness-only health check): if the database is unreachable, startup migration fails, so liveness implicitly covers database availability at boot.
- Q3 = B means the toolchain is installed explicitly in the workflow (`actions/setup-dotnet`, `pnpm/action-setup`) rather than assumed present on the runner — which also satisfies SECURITY-10's pinned-tool-version requirement.

---

## Requirements Analysis — Clarification Answers Received

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "klaar, antwoorden staan in het bestand" — answers recorded in `inception/requirements/requirement-clarification-questions.md`: CQ1 = C, CQ2 = C, CQ3 = C, CQ4 = A, CQ5 = B.

**AI Response**: "All clarifications unambiguous; no further contradictions detected. Generated `inception/requirements/requirements.md` at comprehensive depth. Updated `aidlc-state.md` with Extension Configuration and Operations Configuration."

**Context**: INCEPTION — Requirements Analysis, Steps 7–8.

### Clarifications resolved
- **CQ1 = C**: Production runs on the Pi for now, with shared hosting as the eventual target. Transport must be structured so FTPS can be added alongside SSH/SCP without restructuring the workflow. Resolves the Q1 environment mix-up; SSH/SCP is correct for both environments today.
- **CQ2 = C**: Two builds now (reference pattern), with runtime-delivered environment configuration recorded as a possible later improvement. Same-origin API base URL is still adopted for its own sake.
- **CQ3 = C**: Atomic release-directory switch instead of `app_offline.htm`. Supersedes Q22 = A, which was inapplicable to the Pi.
- **CQ4 = A**: Both SECURITY-04 (security headers middleware) and SECURITY-14 (Sentry alert rules) are addressed within this feature, with log retention documented as a deliberate deviation.
- **CQ5 = B**: CSP strict for `/admin` and `/api/v1`, more permissive for the public website.

### Derived requirement stated rather than asked (ASM-01)
Combining Q4 = C (`wwwroot/web/`) with CQ3 = C (atomic release switch) creates a failure mode neither answer covers on its own: switching the release directory would discard the customer's website along with the old release. `wwwroot/web/` must therefore live outside the swapped release directory and be linked into it. This follows necessarily from the two decisions, so it is recorded as assumption ASM-01 with its rationale and consequence rather than opening a third question round — the user can reject it at approval.

### Artifact produced
`inception/requirements/requirements.md` — 23 functional requirements, 10 non-functional requirements, 32 traced decisions (D-01…D-32), 7 assumptions, 4 open items, 4 documented security deviations, and a full SECURITY-01…15 compliance assessment.

### Security Compliance summary (Security Baseline extension, enabled and blocking)
Addressed: SECURITY-01, 03, 04, 06, 09, 10, 11, 13, 14 (with deviation DEV-01). Pre-existing and unchanged: SECURITY-05, 08, 12, 15. N/A: SECURITY-02 (no load balancer, API gateway or CDN in this architecture). Partially N/A: SECURITY-07 (no cloud networking; applicable parts documented as host setup).

**No blocking security findings** — every rule is either addressed by a requirement, pre-existing and unchanged, marked N/A with rationale, or recorded as an explicitly accepted deviation (DEV-01…DEV-04, all pre-existing or cost-driven, none introduced by this feature).

Two security-relevant findings are logged as open items rather than silently dropped: OPEN-01 (correlation/request ID required by SECURITY-03 does not exist yet) and OPEN-02 (`AvailabilityMiddleware.IsAdminBypass` reads the JWT without validating its signature — pre-existing, needs an explicit owner).

---

## Requirements Analysis — Approved

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Continue to Next Stage"

**AI Response**: "Requirements approved (User Stories option offered and not taken). Marked complete in `aidlc-state.md` and proceeded to Workflow Planning."

**Context**: INCEPTION — Requirements Analysis approved, including assumption ASM-01 and the four documented security deviations.

---

## Workflow Planning — Complete

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated planning step)"

**AI Response**: "Loaded all prior context (4 reverse-engineering artifacts, requirements.md, both question files with answers). Performed transformation-scope, change-impact, component-relationship and risk analysis. Created `inception/plans/execution-plan.md` with a validated Mermaid workflow diagram. Updated `aidlc-state.md` with the full stage matrix, execution plan summary and current status."

**Context**: INCEPTION — Workflow Planning, Steps 1–8.

### Risk assessment: HIGH
Rated High rather than Medium because three failure modes are destructive **and** silent:
1. An atomic release switch carrying `wwwroot/web/` inside the swapped directory would destroy the customer's public website on every deploy (ASM-01) — data loss, not a bug.
2. Losing the Data Protection key ring makes stored slave API keys undecryptable; the symptom resembles a network fault and would be misdiagnosed.
3. Automatic Core migrations at startup (FR-11) make deployment self-contained and simultaneously remove the human gate before a migration runs against production — which is why FR-20 (pre-deploy backup) and forward-compatible migrations are load-bearing rather than optional.
Also: the deploy path cannot be fully tested in CI (needs the real Pi, SSH credentials and a database), and CSP failures only manifest in a real browser on pages this repository does not own.

Rollback complexity: Moderate. Testing complexity: Complex.

### Stage decisions
- **User Stories — SKIP**: infrastructure/operations work with no new end-user functionality or persona; the website-builder "persona" is properly served by FR-09's documented contract. Offered at Requirements Analysis approval and not requested.
- **Application Design — EXECUTE**: genuine component-boundary decisions — whether cross-cutting registrations (health checks, security headers, Data Protection) belong in `Core` (inherited by both hosts including the Slave) or in `Api`; redesigning static-file serving for two mounts and two fallbacks; a CSP path-scoping mechanism that does not exist yet; and a deploy-transport abstraction admitting FTPS later (NFR-09).
- **Units Generation — EXECUTE**: 7 units with a load-bearing ordering constraint — durability changes must precede the first automated deploy, and quality-gate fixes must precede switching blocking gates on.
- **Functional Design — EXECUTE units 2, 3, 4 only**: those contain real behavioural logic; units 1, 5, 6, 7 are lint/package changes, declarative YAML and documentation.
- **NFR Requirements — SKIP all units**: already captured comprehensively with traceability in `requirements.md` § 5 (NFR-01…10) and § 6 (full SECURITY-01…15 assessment); the tech stack is fixed.
- **NFR Design — EXECUTE units 3, 4 only**, recorded as a **deliberate deviation** from the workflow's default coupling (NFR Design skipped when NFR Requirements is skipped). Rationale: for these two units the NFR *is* the deliverable — CSP composition and path-scoping plus HSTS-behind-proxy behaviour (SECURITY-04), and structured-logging shape, correlation ID (OPEN-01), alertable-event definition and PII exclusion (SECURITY-03, SECURITY-14). Those are pattern decisions, not requirement decisions, so skipping requirements while designing patterns is the correct split rather than an oversight.
- **Infrastructure Design — EXECUTE units 6, 7 only**: the host layout (release-directory scheme, where `wwwroot/web/` lives so ASM-01 holds, symlink/mount strategy, process restart, backup placement, transport abstraction) and the website contract that depends on it. Produces documented procedure rather than IaC, because NFR-01 forbids server configuration.
- **Operations — all three stages EXECUTE**: Operations Configuration = Yes, and for this feature it is the centre of gravity (FR-17, FR-19, FR-20, FR-23), including the `dotnet-appsettings` compliance gate at Production Readiness Validation.

### Proposed unit sequence (finalised at Units Generation)
1. Quality Gate Prerequisites (FR-21, FR-22) — first, so blocking gates are not red on arrival
2. Hosting Layout & Data Durability (FR-07, FR-08, FR-10, FR-11, FR-12) — before any deploy exists
3. HTTP Security Headers & CSP (FR-18)
4. Observability Integration (FR-13, FR-14, FR-15, FR-16)
5. CI Workflow (FR-01, FR-05)
6. Deploy Workflow (FR-02, FR-03, FR-04, FR-06, FR-20)
7. Repository Documentation (FR-09 + README/`.env.example` updates)

### Coordination note
`SlpModularCms.Api.Slave` inherits every `Core` change and has no test project by design, so it is verified at Build and Test by actually starting it. The `/health` bypass in `Modules.Availability` must land in the same unit as the health endpoint, or `/health` returns 503 on a disabled instance — the exact conflation the user corrected during Reverse Engineering.

### Security Compliance (Security Baseline extension — enabled, blocking)
No new blocking findings at this stage. Workflow Planning produces a plan, not code or configuration; the SECURITY-01…15 assessment recorded in `requirements.md` § 6 remains current and is carried forward unchanged. SECURITY-10 (pinned tool versions, no `latest` tags) and SECURITY-13 (access-controlled, auditable pipeline definitions) are explicitly reflected in the plan's Unit 5 and Unit 6 scope.

---

## Workflow Planning — Approved

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Continue to Next Stage"

**AI Response**: "Execution plan approved, including the User Stories and NFR Requirements skips and the deliberate NFR Design coupling deviation. Proceeded to Application Design."

**Context**: INCEPTION — Workflow Planning approved. Next stage: Application Design.

---

## Application Design — Plan Created

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated planning step)"

**AI Response**: "Analyzed context and inspected both host `Program.cs` files to establish the composition baseline. Created `inception/plans/application-design-plan.md` with 8 design steps and 12 embedded design questions."

**Context**: INCEPTION — Application Design, Steps 1–6.

### Baseline established by inspection
`SlpModularCms.Api/Program.cs` and `SlpModularCms.Api.Slave/Program.cs` are near-identical, differing only in the static-file and SPA-fallback section. This feature adds the same new registrations to both, which would grow that duplication — raised as Question 9 rather than silently choosing.

### Question areas
1. Home project for the four new cross-cutting concerns (`Core` versus host) — consequential because `Core` is inherited by the Slave
2. What the Slave host should and should not receive
3. Static-file serving model for the two mounts
4. Security-headers placement in the pipeline — noting that static files short-circuit, so headers registered after them never reach the public website
5. Configurability surface for the security headers
6. CSP path-scoping mechanism
7. Which `DbContext` hosts the Data Protection keys
8. Migration-at-startup failure behaviour, and its interaction with the liveness health check
9. Whether to extract the duplicated host composition
10. Sentry registration shape
11. Deploy transport abstraction (workflow layer, not C#)
12. OPEN-02 ownership — fold into this feature, defer to `tech-debt-backlog`, or accept as documented risk

---

## Application Design — Answers Received, Follow-up Round Opened

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "klaar, antwoorden staan in het bestand" — answers in `inception/plans/application-design-plan.md`: Q1 = A, Q2 = "A, Want de Slave is wel een API die laat zien hoe een klant-API eruit kan komen te zien.", Q3 = A, Q4 = C, Q5 = B, Q6 = B, Q7 = A, Q8 = A, Q9 = A, Q10 = B, Q11 = B, Q12 = A.

**AI Response**: "Analyzed all 12 answers per Step 8. Ten are unambiguous and mutually consistent. Two required follow-up, added to the plan as Part 3."

**Context**: INCEPTION — Application Design, Steps 7–9.

### Decisions accepted
- **Q1 = A**: all four new cross-cutting concerns live in `Core` as extension methods — both hosts get identical behaviour, no duplication.
- **Q2 = A**: the Slave receives everything except the static-file mounts. User rationale recorded: the Slave demonstrates what a customer-facing API instance looks like, so it should behave like production rather than like a stripped-down test harness. This elevates the Slave from "local dev tool" to "reference instance", which is a meaningful reframing.
- **Q3 = A**: two explicit `UseStaticFiles` registrations, each with its own `PhysicalFileProvider` and `RequestPath`.
- **Q7 = A**: Data Protection keys live in `ApplicationDbContext`, which will implement `IDataProtectionKeyContext`. Requires a new Core migration — acceptable because FR-11 now migrates that context automatically.
- **Q8 = A**: fail fast on migration failure. Consistent with the liveness-only health check (D-21): a process that cannot migrate does not start, so `/health` stops answering and UptimeRobot goes red — the monitoring signal is meaningful precisely because of this choice.
- **Q9 = A**: the two `Program.cs` files stay separate. With Q1 = A the shared logic is in `Core` extension methods, so what remains duplicated is the explicit list of calls — which is intentional readability, not accidental duplication.
- **Q10 = B**: Sentry and logging configuration registered separately, so structured logging works without Sentry.
- **Q11 = B**: one reusable workflow per transport (`deploy-scp.yaml`, later `deploy-ftps.yaml`) with an identical input interface.
- **Q12 = A**: **OPEN-02 is folded into this feature.** `AvailabilityMiddleware.IsAdminBypass` will validate the token properly instead of reading it unvalidated. Lands in the same unit as the `/health` bypass, since both touch the same middleware. This closes a SECURITY-08 finding and requires a new functional requirement — to be added as FR-24 and OPEN-02 marked resolved.

### Follow-ups raised
1. **Q4 = C would weaken security if implemented literally.** The user chose "headers only on SPA/HTML responses, not assets". That is correct for `Content-Security-Policy`, `X-Frame-Options` and `Referrer-Policy`, but wrong for two headers: `X-Content-Type-Options: nosniff` exists specifically to stop MIME-sniffing of **non-HTML** resources, so restricting it to HTML removes it exactly where it does its job; and `Strict-Transport-Security` is a host-level transport directive that a visitor whose first request is an asset would never receive. Follow-up offers per-header scoping as the recommended reading of the same intent.
2. **Q5 = B and Q6 = B appear to conflict** (minimal configuration versus a configurable path-to-policy rule list). One reading makes them consistent: policy *definitions* in code (Q5), path-to-policy *assignment* and environment-specific origins in configuration (Q6). Presented with a concrete `appsettings` shape for confirmation rather than assumed.

---

## Application Design — Follow-up Answers and Artifacts Generated

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "klaar, antwoorden staan in het bestand" — follow-up answers in `inception/plans/application-design-plan.md` Part 3: FU1 = A, FU2 = A.

**AI Response**: "Both follow-ups resolved. Updated `requirements.md` (added FR-24, closed OPEN-02, upgraded SECURITY-08 to Improved, count now 24 FRs). Generated all five Application Design artifacts and marked every plan step complete."

**Context**: INCEPTION — Application Design, Steps 10–12.

### Follow-up resolutions
- **FU1 = A**: per-header scoping. `X-Content-Type-Options` and `Strict-Transport-Security` apply to **all** responses; `Content-Security-Policy`, `X-Frame-Options` and `Referrer-Policy` to HTML responses only. This preserves the user's intent from Q4 = C while closing the gap that a literal reading would have created — `nosniff` exists precisely to protect non-HTML resources, so restricting it to HTML would have removed it where it does its job.
- **FU2 = A**: confirmed the synthesis of Q5 = B and Q6 = B — policy *definitions* in code, path *assignment* and environment-specific *origins* in configuration. A misconfiguration can misroute a path but cannot invent a broken policy.

### Requirements updated
- **FR-24 added**: validate the token in the availability gate's admin bypass (Q12 = A), replacing the unvalidated `ReadJwtToken` call.
- **OPEN-02 closed**: folded into this feature, landing in the same unit as the `/health` bypass.
- **SECURITY-08 upgraded** from "Pre-existing, unchanged" to "**Improved**".
- Totals now: 24 FRs, 10 NFRs, 32 decisions, 7 assumptions, 3 remaining open items, 4 documented deviations.

### Artifacts generated
`inception/application-design/`: `components.md`, `component-methods.md`, `services.md`, `component-dependency.md`, `application-design.md`.

**14 code components** (9 new, 5 modified) plus 2 workflow components. All in `Core` per Q1 = A except the static mounts, which are `Api`-only per Q2 = A.

### TWO CONFLICTS DISCOVERED DURING DESIGN
Both found by tracing composition order; both would have produced code that looks correct while achieving nothing.

1. **Duplicate `AddDataProtection()` would silently defeat FR-12.** `AvailabilityModule.RegisterServices` and `MasterModule.RegisterServices` each call `services.AddDataProtection()`. Module registration runs *after* the host's, so those bare calls would override the persistent key store from `AddCmsDataProtection()`. FR-12 would appear implemented, registration tests would pass, and the key ring would still be ephemeral — so the first atomic release switch would silently break master↔slave trust in a way presenting as a network fault. Resolution: remove both module calls; host configures once. Assigned to Unit 2 with a test asserting the persistent store survives module registration.
   **Second-order finding**: the Data Protection **application discriminator must be set explicitly** — it defaults to deriving from the content root path, which changes on every atomic release-directory switch (FR-06), defeating FR-12 by a different route.
2. **`AvailabilityMiddleware` runs before `UseAuthentication()`**, so `HttpContext.User` is unpopulated when the admin bypass is evaluated. FR-24 therefore has two viable implementations — validate the token in the middleware with shared `TokenValidationParameters`, or move authentication earlier (smaller change, wider blast radius across all modules). Recorded rather than decided; resolved in Functional Design for Unit 2.

### Additional design obligations recorded
- `C-10` must tolerate a **missing `wwwroot/web/` at startup** — a fresh deployment has none until a website workspace deploys into it, and the CMS must still start and serve `/admin` and `/api/v1`.
- An unknown CSP policy name must fail at **startup**, not degrade per request (SECURITY-15, fail closed).

### Security Compliance (Security Baseline extension — enabled, blocking)
Addressed: SECURITY-01, 03, 04, 06, 09, 10, 11, 13, 14 (with DEV-01). **Improved: SECURITY-08** (FR-24 fixes a pre-existing finding). Unchanged: SECURITY-05, 12, 15. N/A: SECURITY-02. Partially N/A: SECURITY-07.

**No blocking security findings.**

---

## Application Design — Approved

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Continue to Next Stage"

**AI Response**: "Application Design approved, including FR-24, the two composition conflicts carried to Unit 2, and the additional design obligations. Proceeded to Units Generation Part 1 (Planning)."

**Context**: INCEPTION — Application Design approved. Next stage: Units Generation.

---

## Units Generation — Plan Created (Part 1)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated planning step)"

**AI Response**: "Created `inception/plans/unit-of-work-plan.md` with 6 decomposition steps and 8 questions covering unit boundaries, sequencing, completion criteria, version control and artifact mapping."

**Context**: INCEPTION — Units Generation, Part 1 Steps 1–5.

### Question areas
1. Whether the proposed 7-unit split holds
2. Whether Unit 1 (lint fixes, package pins) warrants its own unit
3. Whether Unit 2 is too large — it bundles serving, health/gate and data-durability concerns whose only commonality is that all must land before the first deploy
4. Sequencing: strictly serial versus grouping independent units into one approval round
5. Per-unit definition of done, noting that Q9 of the requirements deliberately excluded a coverage gate
6. Commit and review granularity on `feature/gitea-deployment-workflow` — nothing has been committed yet; all aidlc documentation is currently uncommitted working-tree changes
7. What the mandatory `unit-of-work-story-map.md` maps to, given User Stories was skipped — proposed mapping the 24 FRs as the equivalent
8. Whether documentation belongs in Construction Unit 7 or the Operations phase, given Operations already produces deployment, rollback, monitoring and readiness documents

---

## Units Generation — Answers Received and Artifacts Generated (Part 2)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "ik heb de vragen beantwoord" — answers in `inception/plans/unit-of-work-plan.md`: Q1 = C, Q2 = B, Q3 = B, Q4 = B, Q5 = B, Q6 = A, Q7 = A, Q8 = A.

**AI Response**: "Analyzed all answers per Step 7 — no contradictions or ambiguities found, so no follow-up round was needed. Executed the plan and generated all three unit artifacts. Marked every plan step complete and updated `aidlc-state.md`."

**Context**: INCEPTION — Units Generation, Part 1 Steps 6–11 and Part 2 Steps 12–15.

### Decomposition outcome
Two changes to the proposed split that cancel out numerically — **still 7 units**, but with boundaries drawn along the work rather than along the deadline:
- **Q3 = B**: the oversized Unit 2 split into **U1 Hosting & Serving** and **U2 Data Durability**. It had bundled serving, middleware and persistence work whose only commonality was "must land before the first deploy".
- **Q2 = B**: the quality-gate prerequisites (5 lint fixes, 2 package pins) merged into the CI unit, so gates and their prerequisites land in one commit and the pipeline is never red on arrival.

Final units: U1 Hosting & Serving · U2 Data Durability · U3 Security Headers & CSP · U4 Observability · U5 CI Workflow & Gates · U6 Deploy Workflow · U7 Documentation.

### Execution rounds (Q4 = B)
R1 = U1 + U2 (mutually independent) · R2 = U3 + U4 (tightly coupled — U3's CSP needs U4's origins) · R3 = U5 + U6 (one shared input interface) · R4 = U7. One commit per unit; single PR at the end (Q6 = A). A round is an approval boundary, not a commit boundary.

### Consequence of Q2 = B, recorded and mitigated
Merging the lint fixes into U5 means `pnpm run lint` stays failing through U3 and U4, and U4 changes frontend files — so new violations would hide among the five pre-existing ones. Mitigation recorded in `unit-of-work-dependency.md`: run lint on **changed files** during U4. The file sets are disjoint (U5 fixes four component files; U4 touches `main.tsx`, `config.ts` and a new Umami component), so there is no merge risk — only a detection gap.

### Change to the execution plan's per-unit stage assignment
The plan assigned Functional Design to "units 2, 3, 4" under the pre-split numbering. After the split, **both halves need it**: U1 for the FR-24 pipeline-ordering decision and the missing-`wwwroot/web/` startup behaviour, U2 for the registration-order conflict and migration failure semantics. Functional Design is therefore **×4 (U1–U4)** rather than ×3. Recorded in `unit-of-work-story-map.md`, which is authoritative over the execution plan's pre-split table, and reflected in `aidlc-state.md`.

### Coverage verification
All 24 functional requirements assigned, none orphaned or duplicated. All 16 design components assigned. Two requirements deliberately split across a boundary: FR-08 (serving precondition in U1, deployment behaviour in U6) and FR-19 (event emission in U4, alert rules in Operations). Every carried-forward item — the two Application Design conflicts, OPEN-01, OPEN-03, ASM-01, and the two additional design obligations — has an owning unit and a resolving stage.

### Artifacts generated
`inception/application-design/`: `unit-of-work.md`, `unit-of-work-dependency.md`, `unit-of-work-story-map.md`.

### Security Compliance (Security Baseline extension — enabled, blocking)
No new blocking findings. This stage produces a decomposition, not code. Relevant to the assessment: U2's ordering constraint directly protects SECURITY-01 and SECURITY-13 (key-ring integrity across deploys), U5 carries SECURITY-10 (vulnerability gate, pinned tool versions), and U1 carries the SECURITY-08 improvement (FR-24). The `requirements.md` § 6 assessment remains current.

---

## Units Generation — Approved

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Continue to Next Stage"

**AI Response**: "Units approved. Entered the CONSTRUCTION PHASE at Round 1 (U1 Hosting & Serving + U2 Data Durability), starting with Functional Design for both units."

**Context**: INCEPTION complete. Transition to CONSTRUCTION PHASE.

---

## Functional Design — Plans Created for U1 and U2 (Round 1)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated planning step)"

**AI Response**: "Created functional design plans and dedicated question files for both Round 1 units, per the rule that plan files contain only checklists and questions live in separate files."

**Context**: CONSTRUCTION — Functional Design, Steps 1–5, for U1 and U2 together (Round 1 grouping per Q4 = B).

### Artifacts created
- `construction/plans/u1-hosting-serving-functional-design-plan.md` — 6 steps
- `construction/plans/u1-hosting-serving-fd-questions.md` — 5 questions
- `construction/plans/u2-data-durability-functional-design-plan.md` — 6 steps
- `construction/plans/u2-data-durability-fd-questions.md` — 5 questions

### U1 question areas
1. **FR-24 implementation approach** — the § 5.2 conflict: validate the token in the middleware with shared `TokenValidationParameters`, versus moving `UseAuthentication()` before the module middleware
2. Behaviour when `wwwroot/web/` is absent — 404, built-in placeholder, or redirect to `/admin`
3. Whether a missing `wwwroot/web/` should be logged at startup, noting it is normal on a fresh install but would mean the customer's website has vanished on a running production environment
4. `/health` response contract — framework default plain text, or JSON with more detail
5. Whether `/admin` should redirect to `/admin/`, since the SPA is built with `base: '/admin/'` and relative references resolve one level too high without the trailing slash

### U2 question areas
1. Application-discriminator source — the value that must stay stable across atomic release switches, since the default derives from the content root path
2. **Key encryption at rest** — `PersistKeysToDbContext` stores keys unencrypted by default; DPAPI is unavailable on Linux, and X.509 encryption relocates the loss problem to the certificate. SECURITY-01 relevance flagged explicitly
3. Startup behaviour when the database is temporarily unreachable, distinguishing "not up yet" from "migration is broken" — relevant because the app and SQL Server may start together on the Pi
4. Concurrent migration by two starting instances — currently impossible (one instance per database) but worth an explicit assumption
5. Key lifetime and rotation, including whether to document that the key table must never be pruned

---

## Functional Design — Answers Received and Artifacts Generated (U1 and U2, Round 1)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "klaar, antwoorden staan in het bestand" — U1: Q1 = A, Q2 = B, Q3 = A, Q4 = C, Q5 = A. U2: Q1 = A, Q2 = C, Q3 = C, Q4 = C, Q5 = C.

**AI Response**: "Analyzed all ten answers per Step 6. No contradictions or vague responses; no clarification round needed. Generated six functional design artifacts (three per unit). Recorded DEV-05 in `requirements.md` and documented one accepted disclosure trade-off. Marked all plan steps complete."

**Context**: CONSTRUCTION — Functional Design, Steps 6–8, for U1 and U2.

### U1 decisions
- **Q1 = A — FR-24 approach resolved (§ 5.2 conflict closed)**: validate the token inside `AvailabilityMiddleware` using the same `TokenValidationParameters` as the JWT bearer scheme, resolved from a **single shared source** rather than copied. Chosen over moving `UseAuthentication()` earlier, which would have changed the pipeline for every module including future ones. A drift in which the gate is more permissive than the scheme would silently re-open the hole FR-24 closes, which is why the single-source constraint is a rule (BR-U1-11) rather than a note.
- **Q2 = B**: a built-in placeholder page is served when `wwwroot/web/index.html` is absent. Stored as an **embedded resource**, not a file in `wwwroot/web/` — a file there would sit inside the directory a website workspace owns and overwrites, so it would either be deleted by the first real deployment or mistaken for part of the customer's site.
- **Q3 = A**: a missing `wwwroot/web/` logs a warning at startup with the expected path. Normal on a fresh install, but on a running production instance it means the customer's website has vanished — a warning is visible in Sentry without blocking startup.
- **Q4 = C**: `/health` returns JSON with status, timestamp, version and loaded module names. Directly serves NFR-06: `ModuleOrchestrator` logs rather than throws on module load failure, so an instance can start with reduced capability, and this is the only way to detect that after a deploy without host access.
- **Q5 = A**: `/admin` redirects to `/admin/`, since the SPA is built with `base: '/admin/'` and relative references otherwise resolve one level too high.

### U2 decisions
- **Q1 = A**: the application discriminator is a **fixed constant in code**, not configuration. The default derives from the content root path, which changes on every atomic release switch — persisting keys in the database while letting the discriminator move would produce keys that are stored but underivable. A constant cannot be forgotten during a host migration or accidentally differ between instances.
- **Q2 = C**: keys stored unencrypted at rest for now, with certificate encryption as a separate follow-up. **Recorded as DEV-05** in `requirements.md` — the one deviation this feature introduces, accepted because it removes a far larger risk than it adds.
- **Q3 = C**: failures are classified — connection failures retry with backoff, migration failures fail immediately. On the Pi the app and SQL Server may start together after a reboot, so a brief unavailability window is normal operation rather than a fault; a broken migration is a fault, and retrying it only delays the inevitable.
- **Q4 = C**: concurrent migration handled by documentation rather than a distributed lock. One instance per database holds by design today; a lock would add failure modes without removing any. Recorded with the condition that automatic startup migration must be revisited **before** any move to multiple instances sharing a database.
- **Q5 = C**: framework default 90-day rotation, plus an explicit documented rule that the keys table must **never** be pruned — the single most destructive maintenance action available against this system, because it looks like harmless housekeeping and permanently breaks every Master↔slave relationship.

### Accepted trade-off recorded rather than escalated
U1 Q4 = C places the application **version** on an anonymous endpoint, which touches SECURITY-09 hardening. Judged acceptable and documented in `business-rules.md` under BR-U1-17 rather than opened as another question round, on two grounds: module names are **already** publicly exposed by the anonymous `/api/v1/System/capabilities`, so that field adds no new disclosure; and the version field is the primary reason the endpoint exists — confirming which build is live without host access — while an authenticated health endpoint would not work with UptimeRobot. Flagged to the user in the completion message so it can be reversed if unwanted.

### Artifacts generated
- `construction/u1-hosting-serving/functional-design/`: `business-logic-model.md`, `business-rules.md`, `domain-entities.md` — 22 business rules (BR-U1-01…22)
- `construction/u2-data-durability/functional-design/`: `business-logic-model.md`, `business-rules.md`, `domain-entities.md` — 18 business rules (BR-U2-01…18)

U1 adds no persisted entity, no migration and no configuration section. U2 adds one entity (the Data Protection keys table), one Core migration, and no configuration section.

### Security Compliance (Security Baseline extension — enabled, blocking)
- **U1** — SECURITY-05 compliant, **SECURITY-08 improved** (forged-token bypass closed), SECURITY-09 compliant with the documented version disclosure, SECURITY-15 compliant (gate fails closed).
- **U2** — SECURITY-01 **partially compliant, DEV-05** (in-transit enforced, at-rest deferred with compensating controls), SECURITY-03 compliant, SECURITY-09 compliant, **SECURITY-13 improved** (key-ring survival across redeploys is a software-integrity property), SECURITY-15 compliant.

**No blocking security findings.** DEV-05 is a newly introduced deviation, explicitly accepted with rationale and compensating controls.

---

## Functional Design — Approved (U1 and U2)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Continue to next stage"

**AI Response**: "Functional Design approved for both Round 1 units, including DEV-05 and the accepted version-disclosure trade-off on `/health`. Proceeded to Code Generation Part 1 (Planning). NFR Requirements, NFR Design and Infrastructure Design are skipped for U1 and U2 per the execution plan."

**Context**: CONSTRUCTION — Functional Design approved for U1 and U2.

---

## Code Generation — Plans Created for U1 and U2 (Part 1)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated planning step)"

**AI Response**: "Inspected the actual files to be modified (`ApplicationDbContext`, existing test conventions, both `Program.cs` files) and verified the required package version on nuget.org before writing the plans. Created `u1-hosting-serving-code-generation-plan.md` (13 steps) and `u2-data-durability-code-generation-plan.md` (11 steps)."

**Context**: CONSTRUCTION — Code Generation, Part 1 Steps 1–6, for U1 and U2.

### Approval prompt logged before asking
"Code generation plans ready for U1 Hosting & Serving and U2 Data Durability. Review the plans at `construction/plans/u1-hosting-serving-code-generation-plan.md` and `construction/plans/u2-data-durability-code-generation-plan.md`. Approve the plans and proceed to Code Generation (Part 2)?"

### U1 plan — 13 steps
9 files created, 7 modified. Key design decisions recorded in the plan:
- **Step 1 extracts the JWT validation parameters into a shared factory** consumed by both `AddJwtBearer` and the new admin token validator. This implements the BR-U1-11 single-source constraint — two copies could drift, and a gate more permissive than the bearer scheme would silently re-open the hole FR-24 closes.
- **Step 2 deliberately exposes no options parameter** on `AddCmsHealthChecks()`, so adding a database check later is a visible code change rather than configuration drift — keeping D-21 (liveness only) enforced by shape.
- **Step 5 embeds the placeholder page as an assembly resource** rather than placing it in `wwwroot/web/`, because that directory is owned and overwritten by a website workspace.
- **Step 10 modifies two existing test files** for the middleware constructor change, and adds cases asserting that a forged Owner token grants no bypass while a valid one still does.

### U2 plan — 11 steps
5 files created, 6 modified, 1 EF migration. Verified `Microsoft.AspNetCore.DataProtection.EntityFrameworkCore` **10.0.9** exists on nuget.org and matches the existing 10.0.x line.
- **Step 5 removes `AddDataProtection()` from both modules** — the § 5.1 conflict. Recorded in the plan with its rationale, because the removal looks like a regression to a reviewer who does not know the ordering issue.
- **Step 8's first assertion is that the persistent key store survives module registration**, explicitly flagged as the highest-value test in the unit: a test that merely asserts "Data Protection is registered" passes in both the broken and fixed cases.
- A **Risk Notes for the Executor** section lists five ways this unit could be implemented in a way that looks correct while remaining ineffective, each paired with the step that prevents it.

---

## Code Generation — Plans Approved (U1 and U2)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Approve Plan"

**AI Response**: "Both code generation plans approved. Proceeded to Part 2 (Generation)."

**Context**: CONSTRUCTION — Code Generation Part 1 approved for U1 and U2.

---

## Code Generation — Complete (U1 and U2, Round 1)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — plan execution)"

**AI Response**: "Executed both plans in order. 16 files created, 13 modified, 1 EF migration generated. Build clean and all tests green on the first run; nothing needed fixing and retrying. Recorded one plan deviation."

**Context**: CONSTRUCTION — Code Generation, Part 2 Steps 10–14, for U1 and U2.

### Verification (Step 13.5)
- `dotnet build SlpModularCms.sln -c Release` — **0 errors**, 70 warnings (all pre-existing NU1903/NU1510; the two vulnerable packages are U5's scope)
- `dotnet test SlpModularCms.sln -c Release` — **253 passed, 0 failed, 0 skipped**. Baseline was 219, so 34 tests added. Per project: Core 83 (was 54), Availability 82 (was 78), Identity 37 (unchanged), Master 51 (was 50)
- `dotnet ef migrations add AddDataProtectionKeys` — generated `20260727203036_AddDataProtectionKeys`; inspected and confirmed **purely additive** (creates one table, drops nothing), so rollback by redeploying an earlier release stays safe per BR-U2-16
- **Embedded resource name verified against the compiled assembly manifest** — `SlpModularCms.Api.Extensions.WebsitePlaceholder.html`. A wrong name would have failed *silently*, falling back to a minimal inline HTML string, so this was checked rather than assumed

No build or test failure occurred during generation.

### Implementation decisions worth recording
- **The forged-token fix is proven against the real validator, not only a substitute.** The middleware's own tests substitute `IAdminTokenValidator`, which is correct unit-testing practice — but a substitute keeps passing even if the middleware were later rewired back to unvalidated token parsing. A nested `WithRealValidator` test class therefore wires the middleware to the actual `AdminTokenValidator` and asserts both halves: a forged unsigned Owner token is rejected, **and** a genuine Owner token still bypasses (an administrator must always be able to reach a disabled instance).
- **U2's tests assert resulting configuration, not registration.** A test asserting "Data Protection is registered" passes in both the broken and fixed cases because `IDataProtector` resolves either way. The tests instead inspect `KeyManagementOptions.XmlRepository` (must be the EF repository, not the filesystem default) and `DataProtectionOptions.ApplicationDiscriminator` (must be the fixed constant), plus a round-trip proving a value encrypted before a deploy is readable after one.
- **The module-level "does not override" tests live in each module's own test project**, because `Core.Tests` does not reference the modules. Each registers the host's Data Protection first and the module second — the real ordering.
- **`SqlException` is produced genuinely rather than faked.** It has no public constructor, so the test provokes a real one against an unreachable host with a one-second timeout, exercising the classifier against the exact type it will meet in production.
- **Both `AddDataProtection()` removal sites carry an explanatory comment**, because deleting them looks like a regression to anyone unaware of the ordering issue.

### DEVIATION FROM PLAN
**U1 plan Step 11 (`StaticContentTests`) was not implemented as written.** The plan placed it in `SlpModularCms.Core.Tests`, but `StaticContentExtensions` lives in `SlpModularCms.Api`, which `Core.Tests` does not reference and must not. `SlpModularCms.Api` has no test project, by the same deliberate convention that gives `SlpModularCms.Api.Slave` none — the Clients solution folder holds deployables, not tested libraries. Creating one would have been a structural change outside this unit's scope.

The behaviour the step was meant to cover is largely ASP.NET Core's own static-file behaviour rather than this project's logic. The genuinely project-specific parts are **carried to the phase-level Build and Test stage**, where both hosts are started: `/admin` trailing-slash redirect, 404-vs-HTML for missing assets under either mount, SPA fallback resolution for both mounts, placeholder substitution when the website index is absent, and `/health` answering while the instance is availability-disabled.

Recorded in the plan file (Step 11 marked `[~]` with the reason) and in `construction/u1-hosting-serving/code/generation-summary.md`.

### Also carried to phase-level Build and Test
`MigrateCoreDatabase()` against a real SQL Server, and both hosts actually starting. Neither is verifiable without a database.

### Behaviour note recorded for Operations
Static mounts are resolved **at startup**: a directory created after the process started is not served until the next restart. Correct for the intended deployment model — the atomic release switch links `wwwroot/web/` into place before the process starts — but it means dropping a website into a running instance requires a restart.

### Security Compliance (Security Baseline extension — enabled, blocking)
- **SECURITY-08 — improved and now verified by test.** The forged-token bypass is closed; `AdminTokenValidatorTests` covers forged-unsigned, wrong-key, expired, wrong-issuer, non-admin, malformed and absent tokens.
- **SECURITY-13 — improved.** The key ring now survives redeploys, asserted by a round-trip test.
- **SECURITY-03 — compliant.** Migration failure logging carries diagnostic context but no connection string or credentials.
- **SECURITY-15 — compliant.** The gate fails closed; startup fails closed.
- **SECURITY-01 — partially compliant, DEV-05** (keys unencrypted at rest, compensating controls documented).

**No blocking security findings.**

---

## Code Generation — Approved (U1 and U2, Round 1)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "Continue to Next Stage"

**AI Response**: "Round 1 code approved, including the U1 Step 11 deviation and the items carried to the phase-level Build and Test stage. Performed the mandatory phase transition check: updated this feature's status in `aidlc-docs/active-features.md` from 🔵 Inception to 🟢 Construction, and broadened its Affected Components to include Core and Modules. Proceeded to Round 2 (U3 Security Headers & CSP + U4 Observability), starting with Functional Design for both units."

**Context**: CONSTRUCTION — Code Generation approved for U1 and U2. Phase transition applied.

---

## Functional Design — Plans Created for U3 and U4 (Round 2)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "(no user input — automated planning step)"

**AI Response**: "Created functional design plans and dedicated question files for both Round 2 units. Each plan states an explicit scope boundary against the NFR Design stage that follows for these two units, so behaviour questions and pattern questions are not duplicated."

**Context**: CONSTRUCTION — Functional Design, Steps 1–5, for U3 and U4 together (Round 2 grouping per Q4 = B).

### Artifacts created
- `construction/plans/u3-security-headers-functional-design-plan.md` — 6 steps
- `construction/plans/u3-security-headers-fd-questions.md` — 5 questions
- `construction/plans/u4-observability-functional-design-plan.md` — 7 steps
- `construction/plans/u4-observability-fd-questions.md` — 5 questions

### U3 question areas
1. **A genuinely strict CSP would break the admin SPA.** Radix UI components position dialogs and dropdowns using inline `style` attributes, which `style-src 'self'` blocks without `'unsafe-inline'`. The failure is silent in the console sense — misplaced or invisible menus, visible only in a browser and only where the user clicks. Options offered: documented `'unsafe-inline'` for styles while keeping `script-src` strict, nonces/hashes (impractical because Radix generates styles per interaction), or report-only first.
2. What "relaxed" concretely permits for the public website, given the same process also serves the admin UI and API.
3. Whether headers apply in Development — flagged that HSTS on `localhost` is remembered per host by browsers and can interfere with unrelated local projects, while an active CSP locally is genuinely useful.
4. `X-Frame-Options: DENY` as specified in FR-18 also applies to the public website, so a customer embedding their own page in an iframe would break. Offered per-path scoping.
5. Behaviour when the Umami/Sentry origin lists are empty — including the case where a DSN or website ID is configured but the matching CSP origin is not, which would silently block monitoring traffic.

### U4 question areas
1. **Sentry transport: tunnel versus direct.** The reference project tunnels through nginx because ad blockers return `ERR_BLOCKED_BY_CLIENT` for Sentry domains — meaning errors are lost precisely for ad-blocker users. Here nginx is unavailable (NFR-01), so a tunnel would have to be an app endpoint. Noted the side benefit: a tunnel keeps traffic same-origin, so U3's CSP needs no external Sentry origin.
2. **`SendDefaultPii`** — flagged that enabling it sends request headers **including cookies**, and this application carries the `refreshToken` in a cookie. SECURITY-03 forbids logging secrets and PII.
3. Production log level — noted that the current `Warning` baseline means a normal production run logs almost nothing, including startup, module discovery and migration outcome, which are the three most useful things after a deploy.
4. Which security events to emit for alerting (multi-select), including the availability-gate rejection that only became meaningful after the FR-24 fix.
5. Umami on the admin SPA — always, or respecting `Do Not Track`.

---

## Functional Design — U3 Answers Received, U4 Answers Missing (Round 2)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "klaar, antwoorden staan in het bestand" — U3 answers: Q1 = B, Q2 = B, Q3 = A, Q4 = A, Q5 = C. **U4: all five `[Answer]:` tags are empty.**

**AI Response**: "Cannot proceed to artifact generation. Two blockers reported: (1) `u4-observability-fd-questions.md` has no answers filled in at all; (2) U3 Q1 = B is technically unworkable and I described that option too mildly in the first place — correction and a follow-up question added to the U3 file, along with a confirmation question about the SECURITY-04 consequence of Q2 = B."

**Context**: CONSTRUCTION — Functional Design, Step 6 (answer analysis) for U3 and U4. Gate not passed.

### Blocker 1 — U4 unanswered
All five questions in `construction/plans/u4-observability-fd-questions.md` still have empty `[Answer]:` tags. Per the workflow's answer-collection rule, generation cannot start until they are completed.

### Blocker 2 — U3 Q1 = B is not implementable, and my option description was at fault
The user chose "nonces or hashes for styles". I had described this as "theoretically neater but impractical because Radix generates styles per interaction", which understated the problem: **CSP nonces apply only to `<style>` and `<script>` elements, never to inline `style` attributes.** That is specification behaviour, not an implementation limitation. Radix positions dropdowns and dialogs via `style="transform: translate(...)"` attributes whose values change per click, viewport and scroll position.

The only CSP mechanisms that can permit inline style attributes are `'unsafe-inline'` (permits all) or `'unsafe-hashes'` with a hash per exact attribute value (no finite set exists here). There is therefore no variant of option B that leaves the admin UI working.

Follow-up Question 1 added to the U3 file with the corrected explanation and the genuinely available options: `'unsafe-inline'` for styles while keeping `script-src` strict, report-only first, or replacing Radix (an admin-UI rebuild, far outside this feature's scope).

### Consequence of U3 Q2 = B recorded for confirmation rather than assumed
Q2 = B means the public website receives the protective headers but **no CSP at all**. This is a defensible choice consistent with D-31, but SECURITY-04 requires a CSP on all HTML-serving endpoints, so it is a deviation — one that would need recording as DEV-06 with its rationale. Follow-up Question 2 offers three ways to settle it: accept the deviation with the website contract making output escaping the builder's responsibility, a report-only CSP on the website, or an enforcing relaxed CSP that satisfies SECURITY-04 outright.

Note this is a **blocking** consideration under the enabled Security Baseline extension, so it must be resolved explicitly before U3's design artifacts are generated.

### U3 answers accepted without issue
- **Q3 = A**: CSP and the other headers apply in Development; HSTS only outside it — avoids polluting `localhost` while surfacing CSP violations early.
- **Q4 = A**: `X-Frame-Options: DENY` for `/admin` and `/api/v1`, `SAMEORIGIN` for the public website. Refines FR-18, which specified `DENY` globally without considering that a customer might embed their own pages.
- **Q5 = C**: warn at startup when a Sentry DSN or Umami website ID is configured but the matching CSP origin is not — catching precisely the case where monitoring appears configured but silently receives nothing.

---

## Functional Design — Complete (U3 and U4, Round 2)

**Timestamp**: 2026-07-27T00:00:00Z

**User Input**: "klaar, U4 en de vervolgvragen staan nu ook ingevuld" — U3: Q1 → FU1 = A, Q2 → FU2 = C, Q3 = A, Q4 = A, Q5 = C. U4: Q1 = A, Q2 = B, Q3 = C, Q4 = A+B+C+D+E+F, Q5 = A.

**AI Response**: "All answers received and analysed. Generated seven functional design artifacts (three for U3, four for U4 including `frontend-components.md`). Three technical consequences recorded as design decisions rather than opened as a further question round. No new deviation needed — SECURITY-04 is now satisfied outright."

**Context**: CONSTRUCTION — Functional Design, Steps 6–8, for U3 and U4.

### U3 decisions
- **FU1 = A**: `style-src 'self' 'unsafe-inline'` under `Strict`, bounded to styles. `script-src 'self'` stays closed with no `'unsafe-inline'` and no `'unsafe-eval'` — recorded as BR-U3-13, a rule rather than a default, because relaxing it would collapse the value of the whole policy.
- **FU2 = C — supersedes Q2 = B.** The public website receives an **enforcing** relaxed CSP rather than none, so SECURITY-04 is satisfied on every HTML-serving path and **DEV-06 is not needed**. "Relaxed" still blocks external script origins, so it remains a genuine boundary rather than a rubber stamp.
- **Q3 = A**: every header applies in Development except HSTS, which browsers remember per host and would otherwise pollute `localhost`.
- **Q4 = A**: `DENY` / `frame-ancestors 'none'` under `Strict`; `SAMEORIGIN` / `'self'` under `Relaxed`. Refines FR-18, which specified `DENY` globally without accounting for a customer embedding their own pages.
- **Q5 = C**: startup warning when a Umami website ID is configured but its origin is absent from the CSP.

### U4 decisions
- **Q1 = A**: Sentry tunnel through the API. Ad blockers block Sentry domains, losing errors precisely for ad-blocker users. Constrained by BR-U4-16: the tunnel forwards **only** to the host derived from the configured DSN — a caller-supplied destination would make an anonymous endpoint into a server-side request forgery primitive.
- **Q2 = B**: `SendDefaultPii` enabled with scrubbing.
- **Q3 = C**: `Information` for the console, framework included.
- **Q4 = all six event types**, all emitted at `Warning` or above so they cross the Sentry event threshold by construction.
- **Q5 = A**: Umami in test and production, never locally, `Do Not Track` deliberately not consulted.

### THREE CONSEQUENCES RECORDED AS DESIGN DECISIONS RATHER THAN A FURTHER QUESTION ROUND

1. **The scrub list is longer than Q2 = B implied.** Enabling `SendDefaultPii` attaches request headers, and this application carries **two** standing credentials in headers: the `refreshToken` cookie and `X-Master-Api-Key`. The API key was not mentioned when the option was chosen, but it is the same class of secret and would otherwise be sent to a third party on every error raised during a master/slave call. BR-U4-13 therefore removes the entire `Cookie` header, `Authorization`, `X-Master-Api-Key` and the request body. Removing the whole `Cookie` header rather than surgically deleting one cookie, because rewriting a header is error-prone.

2. **Console and Sentry thresholds had to be split.** Q3 = C (`Information` everywhere) taken literally together with Q16 = C (structured logging to Sentry beyond exceptions) would send an event per request, exhausting Sentry's free plan within hours and burying real errors in request noise. BR-U4-06 and BR-U4-07 split them: console `Information` (honouring Q3 = C), Sentry **events** at `Warning` and above (still more than exceptions, honouring Q16 = C), Sentry **breadcrumbs** at `Information` so every event arrives with the trail that led to it. This satisfies both answers rather than choosing between them.

3. **The Q5 = C startup warning covers Umami only, not Sentry.** The question anticipated needing a Sentry ingest origin in `connect-src`, but Q1 = A's tunnel keeps browser reporting same-origin, so `connect-src 'self'` already covers it and there is no Sentry origin to forget. Umami's script still loads from its own origin, so that check remains meaningful.

### Additional decisions taken and documented
- The **placeholder page** (U1) receives the relaxed policy; its inline `<style>` block is permitted. Flagged because it is the one HTML document this repository serves at the website path, so tightening the relaxed policy would break it on a **fresh installation** — the worst moment for a confusing failure.
- **Frontend `sendDefaultPii` is false** even though the backend enables it with scrubbing: the backend can scrub in-process before transmission, the browser cannot, and the frontend has nothing to add that the backend cannot already report.
- **Handled `ProblemDetailsError` instances must not become Sentry events**, or every user validation failure becomes an alert. Only unhandled errors and `NetworkError` are reported.
- **Invitation tokens travel in a query string** on one endpoint and query strings are retained. Single-use and time-limited rather than a standing credential; documented so the trade-off is visible rather than accidental.

### Artifacts generated
- `construction/u3-security-headers/functional-design/`: `business-logic-model.md`, `business-rules.md`, `domain-entities.md` — 24 rules (BR-U3-01…24)
- `construction/u4-observability/functional-design/`: `business-logic-model.md`, `business-rules.md`, `domain-entities.md`, `frontend-components.md` — 29 rules (BR-U4-01…29)

### Security Compliance (Security Baseline extension — enabled, blocking)
- **SECURITY-04 — compliant, no deviation.** All five headers, HSTS one year with `includeSubDomains`, and a CSP on every HTML-serving path including the public website. `'unsafe-inline'` documented per policy.
- **SECURITY-03 — compliant.** Correlation ID on every entry; credentials excluded by BR-U4-05 and BR-U4-13.
- **SECURITY-11 — improved.** CSP is a genuine second layer; the tunnel's fixed destination prevents request forgery.
- **SECURITY-14 — addressed, DEV-01 unchanged** (retention shortfall already accepted).
- **SECURITY-15 — compliant.** Fails closed at startup on an unknown policy; observability failures never reach request handling.

**No blocking security findings. No new deviation** — FU2 = C removed the need for the DEV-06 that Q2 = B would have required.

---

## 2026-07-28 — CONSTRUCTION: NFR Design (Round 2, U3 + U4)

**Stage**: NFR Design — executed for U3 and U4 only, per the execution plan. NFR Requirements skipped for all units (already captured in `requirements.md` § 5 and § 6).

No question round. The two decisions the earlier stages had left open were technical rather than preferential, and three remaining values had defensible defaults; all five are recorded below with the reasoning, and each is one line to change.

### OPEN-01 CLOSED — the correlation ID is the W3C trace ID

Decided: the trace ID from the ambient `Activity`, with `HttpContext.TraceIdentifier` as the fallback when no `Activity` exists. Enabled by `ActivityTrackingOptions` plus `IncludeScopes`, so every entry from every category — framework included — carries it with **no change to any call site**.

Two reasons, the first decisive:

1. **It crosses the master/slave HTTP boundary.** `HttpClient` injects `traceparent`; the slave's hosting layer adopts it. The hardest diagnostic question in this codebase — "the master says the slave rejected its API key; what did the slave see?" — is answerable with one identifier. `TraceIdentifier` is host-local and cannot answer it at all.
2. **It is already the value the client is shown.** ASP.NET Core's `ProblemDetails` writes `traceId` as `Activity.Current?.Id ?? HttpContext.TraceIdentifier`. Choosing the W3C trace ID makes the log entry, the Sentry event, the slave's log entry and the browser's error response carry one value. Choosing `TraceIdentifier` would create two competing identifiers for the same request.

Trap recorded: `ActivityTrackingOptions` populates the scope, `IncludeScopes` renders it. Set the first and forget the second and every log line looks entirely normal with no correlation ID and no error anywhere. A test asserts the field is present in rendered output.

### REF-U3-01 — BR-U3-22 is not implementable and has been replaced

BR-U3-22 asked the backend to warn at startup when a Umami website ID is configured but its script origin is missing from the CSP. **The backend cannot see that ID**: it is a `VITE_` variable baked into the frontend bundle at build time. The check would either always warn or never warn.

Withdrawn from U3 and moved to the **U5 CI workflow**, where both values are visible: if `VITE_UMAMI_SCRIPT_URL` is set for an environment's frontend build, its origin must appear in that environment's `SecurityHeaders:AllowedScriptOrigins`, or the **pipeline fails**. Stronger than the rule it replaces — drift now blocks the deployment instead of writing a warning into a log on a Raspberry Pi.

Carried to U5 as a required gate.

### Four risks closed that the functional design did not name

1. **`Set-Cookie` added to the scrub list.** The functional design named the request `Cookie` header. Response headers can be attached to an event, and `Set-Cookie` on the login and refresh responses carries the `refreshToken` being issued. Scrubbing the request cookie while sending the response cookie would protect nothing.
2. **`SetBeforeSendTransaction` as well as `SetBeforeSend`.** Performance transactions carry request data too. Scrubbing only events leaves a second channel open — less obvious precisely because nobody thinks of a transaction as containing headers. Enabling tracing later without touching that file would start leaking.
3. **`OnRejected` on the rate limiter.** `AddCmsRateLimiting` sets only `RejectionStatusCode`. Today a brute-force attempt against `/api/v1/Auth/login` returns `429` and leaves **no trace anywhere** — the one rate limiter this application has is unobservable. The `RateLimitTriggered` security event needs this callback to exist.
4. **`SentrySdk.FlushAsync` before the migration-failure rethrow.** The SDK sends in the background; a process that throws during startup and exits kills the sender first. The migration failure is the one `Critical` event in the system, and it was the event most likely never to arrive. Bounded at five seconds: a host that cannot reach its database is already down.

### Two "looks correct, does nothing" traps recorded with tests attached

- **Sentry groups log-derived events by message template.** Emitted with interpolation, every distinct email produces a separate Sentry issue, and an alert rule of the form "more than 20 failed logins in 5 minutes" can never fire — no single issue ever reaches 20. FR-19 would be unimplementable while appearing to work. Resolved with source-generated `LoggerMessage` (fixed templates, `EventId` 5001–5006) plus an `ISentryEventProcessor` that maps the ID to a `security_event` tag, so alert rules filter on a tag rather than message text.
- **`DefaultHttpContext.Response.OnStarting` is a no-op.** A unit test that drives the security-headers middleware through a `DefaultHttpContext` finds no headers — and a test asserting *nothing was set* passes for the wrong reason and keeps passing after the middleware is deleted. Resolved by putting all decision logic in a static, dependency-free `SecurityHeaderWriter` tested against a bare `HeaderDictionary`, leaving the middleware as glue whose only risk is ordering, which is verified at Build and Test.

### Three defaults chosen rather than escalated

| Decision | Chosen | Reasoning |
|---|---|---|
| Console format | JSON outside Development, human-readable locally | Supervised process on the Pi; `TraceId` becomes a queryable field. Both set `IncludeScopes`, so the information is identical either way |
| `TracesSampleRate` | `0.1` on both sides | Sentry's free plan counts transactions against the same quota as errors, and this design's value is in errors. The reference project's `1.0` is for a low-traffic marketing site with no API |
| Tunnel max payload | 200 KB | Envelopes with a stack trace and breadcrumbs run tens of KB |

Each is one line; all three are listed at the end of U4's pattern document for review.

### Packages added

| Project | Package | Version |
|---|---|---|
| `SlpModularCms.Core` | `Sentry.AspNetCore` | `6.8.0` — latest on nuget.org; `net10.0` asset to be confirmed at Code Generation |
| `frontend` | `@sentry/react` | `^10.68.0` — same major as the reference project |

`Sentry.AspNetCore` goes into `Core` rather than the hosts, because the scrubber, the processor, `UseCmsSentry` and the tunnel all live there and both hosts consume them. **FR-22 interaction**: this adds a new dependency subtree while U5 is due to pin two packages against advisories — the new tree must be checked in the same pass, not assumed clean because it is new.

### Three divergences from the reference project, all deliberate

- **The dev tunnel proxy targets the local API, not Sentry's ingest host.** The reference proxies straight to Sentry, which hard-codes the project ID in `vite.config.ts` and carries a `LET OP` comment about keeping it in sync by hand. Targeting the local API removes both the synchronisation and the committed project ID.
- **`UmamiAnalytics` drops the script-removing cleanup.** Under React 18 `StrictMode` the double-invocation becomes inject → remove → inject, and removing the element does not unregister Umami's listeners, so the first page view can be counted twice. The component lives for the application's lifetime and has nothing to clean up; the existing duplicate guard handles re-invocation.
- **`tanstackRouterBrowserTracingIntegration` not adopted.** It needs the router instance, and importing `@/router` from `sentry.ts` — called before anything else in `main.tsx` — inverts the initialisation order and pulls the whole route tree into startup. Can be added later inside `main.tsx`, where the router is already imported.

### Artifacts generated
- `construction/u3-security-headers/nfr-design/`: `nfr-design-patterns.md` (11 patterns), `logical-components.md`
- `construction/u4-observability/nfr-design/`: `nfr-design-patterns.md` (10 patterns), `logical-components.md`
- `inception/requirements/requirements.md`: OPEN-01 struck through and closed; open-item count 3 → 2

### Security Compliance (Security Baseline extension — enabled, blocking)
- **SECURITY-03 — compliant, and now mechanised.** The correlation ID arrives by configuration rather than by discipline. EF's `Database.Command` category pinned at `Warning`, because at `Information` it prints parameter values and the login path passes a normalised email through it.
- **SECURITY-11 — compliant.** The tunnel destination is parsed once at startup from the DSN and no part of it can come from the request, which is the single rule separating a tunnel from a server-side request forgery primitive. A rate limiter was added because the other controls bound what each call can do but not how many calls there can be.
- **SECURITY-14 — addressed; DEV-01 unchanged.** Six tagged event types; alert rules configured in Operations.
- **SECURITY-15 — compliant.** Both units fail closed at startup (`ValidateOnStart`, unparseable DSN) and neither throws into the response path.

**No blocking security findings. No new deviation.**

---

## 2026-07-28 — CONSTRUCTION: Code Generation (Round 2, U3 + U4)

**Stage**: Code Generation for U3 HTTP Security Headers & CSP and U4 Observability Integration. Each unit was built and tested before moving on, per the standing instruction not to defer verification to the final stage.

### Verification

| | U3 | U4 |
|---|---|---|
| Release build | 0 errors | 0 errors |
| Backend tests | **315** passed (from 253) | **366** passed |
| Frontend tests | unchanged (213) | **237** passed |
| `tsc -b` | n/a | clean |
| eslint on changed files | n/a | 0 problems |

Full `pnpm run lint` remains at the pre-existing 5 errors / 1 warning — none in files this round touched. FR-21 fixes those in U5.

`Sentry.AspNetCore` 6.8.0 ships a native `net10.0` asset, closing the compatibility question NFR Design carried forward. `@sentry/react` 10.68.0; the lockfile diff is additions only.

### Two findings

**1. `z.string().url()` never caught the typo BR-U4-24 cites.** The rule says a malformed API base URL must not be silently accepted, and names `htp://localhost:7221`. Zod 4's `url()` validates by handing the value to the `URL` constructor, which accepts **any** scheme — verified directly: `htp://localhost:7221` and `ftp://x.nl` both pass a bare `.url()`. So the *pre-existing* frontend validation, before this unit touched it, would have accepted exactly the typo it was supposed to catch, and the SPA would have issued requests to a nonexistent origin — a failure that looks like the API being down. Now `z.url({ protocol: /^https?$/ })`. Not a regression introduced here; found because BR-U4-24 asked for a test the old schema could not have passed.

**2. Comments in `appsettings.json` are verified rather than assumed.** Several non-obvious values gained `//` comments. The JSON configuration provider does tolerate them, but the failure mode if it did not is *both hosts refusing to start after a release switch*, so `DeployedConfigurationTests` now loads both real, committed files through the real provider — and runs `ValidateOnStart` against the committed `SecurityHeaders` section, so a policy-name typo fails in CI rather than in a deployment.

### One deviation, and what it revealed

**`IAdminTokenValidator` collapsed to a single method.** NFR Design specified adding a reason-reporting overload alongside the existing `IsVerifiedAdmin(string?)`. Implemented that way, two existing tests failed in a revealing manner: the middleware called the new overload while the tests stubbed the old one, and an `NSubstitute` substitute returns `false` by default — so **the access decision silently inverted** while both methods existed and compiled.

That is the shape of the defect, not merely of the test failure. Two methods whose difference is invisible at a call site means a caller using the boolean form gets the correct access decision and silently emits no security event — precisely the class of bug this unit exists to make impossible. Replaced with one `Validate(string?) → AdminTokenResult`. Five call sites and two test files updated; behaviour otherwise identical.

Also noted: `MigrationFailure` uses synchronous `SentrySdk.Flush`, because `MigrateCoreDatabase` is synchronous and making it async would change a U2 signature and both hosts' startup for no benefit.

### Traps that were closed rather than encountered

- **`DefaultHttpContext.Response.OnStarting` is a no-op.** All of U3's decision logic went into a static `SecurityHeaderWriter` tested against a bare `HeaderDictionary`, so the middleware is glue whose only risk is registration order — which is carried to Build and Test rather than pretended to be unit-testable.
- **Sentry groups log events by message template.** Six source-generated `LoggerMessage` methods with constant templates and `EventId` 5001–5006, plus a test asserting the rendered message is *identical* across different argument values. Without that, FR-19's rate-based alert rules could never fire while everything appeared to work.
- **`StartsWithSegments`, not `string.StartsWith`.** `"/administrator".StartsWith("/admin")` is true; a public page would have inherited the strict policy and lost its inline scripts with no server-side trace at all. Asserted for `/administrator`, `/admin-tools`, `/administration/contact`, `/healthcheck` and `/api/v10/Users`.

### Additions beyond the functional design, each implemented

- `Set-Cookie` in the scrub list — the login response issues the `refreshToken` there, so scrubbing only the request cookie would protect nothing
- `SetBeforeSendTransaction` alongside `SetBeforeSend`
- `OnRejected` on the rate limiter — a `429` previously left no trace anywhere, making the only rate limiter in the application unobservable
- A `sentry-tunnel` fixed-window limiter — the other controls bound what each call can do, not how many calls there can be
- `SentrySdk.Flush` before the migration-failure rethrow
- Origin-format validation on the CSP origin lists — a CSP source list silently ignores a malformed source, so a URL with a path would look configured and block the script anyway
- `SecurityAuthorizationResultHandler` at `IAuthorizationMiddlewareResultHandler` rather than inside an `IAuthorizationHandler`, because a handler sees one requirement at a time and would report denials for requests that were ultimately allowed

### Divergences from the reference project, all deliberate

- The dev tunnel proxy targets the local API rather than Sentry's ingest host, so no project id is committed and nothing has to be kept in sync by hand
- `UmamiAnalytics` has no script-removing cleanup: under StrictMode the double-invocation becomes inject → remove → inject, and removing the element does not unregister Umami's listeners, so the first page view can be counted twice. Guarded by a test asserting one injection across re-renders
- `tanstackRouterBrowserTracingIntegration` not adopted — it needs the router instance, and importing it from `sentry.ts` inverts the startup order

### Artifacts generated
- `construction/u3-security-headers/code/generation-summary.md`
- `construction/u4-observability/code/generation-summary.md`
- 7 production files + 4 test files for U3; 10 backend and 3 frontend production files + 5 test files for U4

### Security Compliance (Security Baseline extension — enabled, blocking)
- **SECURITY-03 — compliant.** Correlation ID arrives by configuration rather than discipline; EF's `Database.Command` pinned at `Warning`, asserted against the committed files.
- **SECURITY-04 — compliant.** All five headers, one-year HSTS with `includeSubDomains`, a CSP on every HTML-serving path. `script-src 'self'` under Strict is asserted by a test, so loosening it requires deleting a test that explains why.
- **SECURITY-11 — compliant.** The tunnel destination is parsed once at startup and no part of it can come from a request.
- **SECURITY-14 — addressed; DEV-01 unchanged.** Six tagged event types, all `Warning` or above by construction.
- **SECURITY-15 — compliant.** Both units fail closed at startup and neither throws into the response path.

**No blocking security findings. No new deviation.**

---

## 2026-07-28 — CONSTRUCTION: Round 2 closed, plus two fixes found in local testing

Round 2 (U3 + U4) is complete. Running both hosts afterwards surfaced two defects that were not
part of the unit scope. Both were small and contained, so both were fixed in this branch rather
than filed — per the user's standing rule that tech debt is reserved for large or high-impact
changes and code should be left better than it was found.

### Fix 1 — the key ring move leaves older ciphertext unreadable

Covered in full in the previous entry and in `u2-data-durability/code/generation-summary.md`.
Recorded as **ASM-08**; no migration ships because the user confirmed nothing is deployed yet.
Local state was repaired by clearing the stale registration rows on both sides.

### Fix 2 — the integrity check could not distinguish "down" from "does not know us"

**Symptom.** A slave registered with the frontend URL (`http://localhost:5174/`, the vite dev
server) instead of the API URL. The only log line was `Status push failed for slave <url>`, and the
instance could not recover.

**Cause.** `SlaveApiClient.GetRegisteredMasterUrlAsync` mapped four distinct outcomes onto a single
`null` — no HTTP response, a 404, a rejected key, and a genuine answer. `VerifyIntegrityAsync`
treated any `null` as "unreachable" and re-registered only when a *non-null* URL differed. A slave
with no registration returns exactly `null`, so the self-healing path could never repair the one
state that was actually repairable. Recovery required editing the database by hand.

**Fix.** The call now returns `RegisteredMasterUrlResult` carrying a `SlaveContactOutcome`:

| Outcome | Integrity check behaviour |
|---|---|
| `Unreachable` | Mark failed, retry next tick — unchanged |
| `NotAProtocolEndpoint` (404) | Mark failed, and log that the host does not serve the protocol |
| `Unauthorized` (401) | **Register** — repairs a slave that has no registration |
| `Ok` + differing master URL | Re-register — unchanged |
| `Ok` + matching | Healthy |

The 404 branch is the one that would have saved the diagnosis time: it names the actual mistake —
a URL pointing at something other than an instance's API — instead of hiding it behind a generic
contact failure.

**Why automatic registration on a rejected key is safe.** The slave accepts a registration only when
it has none, and refuses any key that does not match an existing one
(`MasterAvailabilityService.RegisterAsync`). Registration therefore succeeds exactly for a slave
that was never registered and fails harmlessly for one that belongs to another master — no takeover
is possible. **The guarantee lives on the slave, not the master**, which makes it easy to weaken by
accident, so `RegisterAsync_ReturnsFalse_WhenKeyMismatch` now states in its documentation that the
master's automatic registration depends on it.

**Scope note.** This is master/slave domain behaviour, not deployment work — the same separation the
user drew when correcting the earlier framing of availability as a health check. It sits in this
branch by the user's explicit decision (no separate branch), and should be read as an in-passing
fix rather than part of the feature.

### Verification at stage close

- `dotnet build SlpModularCms.sln -c Release` — 0 errors
- Backend tests — **372 passed, 0 failed** (Core 196, Availability 82, Master 57, Identity 37)
- Frontend tests — **237 passed, 0 failed**
- `npx tsc -b` clean; eslint clean on all changed frontend files; full `pnpm run lint` unchanged at
  the pre-existing 5 errors / 1 warning (FR-21, U5)

### Commits on `feature/gitea-deployment-workflow`

| Commit | Contents |
|---|---|
| `8568ca4` | Inception: reverse engineering, requirements, design, unit decomposition |
| `29a93ef` | U1 — website/admin split, `/health`, availability gate hardening |
| `5f3eda2` | U2 — key ring in the database, automatic migration, host wiring |
| `589146a` | README: sample password removed (pre-existing change, kept separate) |
| `357d395` | Functional design U3 + U4 |
| `5102f86` | NFR design U3 + U4; OPEN-01 closed, REF-U3-01 raised |
| `a122548` | U3 — security headers and CSP |
| `8e79a72` | U4 — logging, Sentry, tunnel, Umami, six security events |
| `980dc80` | ASM-08 — key ring migration gap recorded |
| `6957ec7` | Integrity check: distinguishes unreachable from unregistered |

Nothing pushed. Next: Round 3 — U5 CI Workflow & Gates and U6 Deploy Workflow, the latter preceded
by Infrastructure Design. U5 carries REF-U3-01's Umami origin gate plus FR-21 and FR-22.

---
## Session Resume

**Timestamp**: 2026-07-28T00:00:00Z

**User Input**: "Ik was bezig met de gitea-deployment-workflow feature met aidlc. Die wil ik graag oppakken. Als het goed is waren net u3 en u4 afgerond"

**AI Response**: "Confirmed Round 2 (U3 Security Headers & CSP, U4 Observability) is complete, committed, and verified (372 backend / 237 frontend tests passing). Nothing pushed. Proceeding to Round 3: U5 CI Workflow & Gates + U6 Deploy Workflow (Infrastructure Design first for U6)."

**Context**: Session resumed; loaded aidlc-state.md, unit-of-work.md, and Round 2 verification record

---
## Infrastructure Design — U6 Deploy Workflow (Planning)

**Timestamp**: 2026-07-28T00:05:00Z

**User Input**: "(implicit — continuing Round 3 per prior approval)"

**AI Response**: "Created infrastructure-design-plan question file with 12 questions across 6 categories (Deployment Environment, Compute, Storage, Networking, Monitoring, Shared Infrastructure), covering Pi topology, publish RID/self-contained mode, systemd restart mechanism and sudo, release/persistence directory layout, retention count, database backup automatability, health-check verification method, rollback-on-failure behaviour, and Gitea secret naming. Functional Design and NFR Design confirmed skipped for U6 per execution plan (Pipeline-type unit)."

**Context**: CONSTRUCTION — Round 3 — U6 Infrastructure Design, Step 3-5 (question generation, awaiting user answers)

---
## Infrastructure Design — U6 Deploy Workflow (Complete)

**Timestamp**: 2026-07-28T00:20:00Z

**User Input**: "Ik heb de vragen ingevuld, ga verder"

**AI Response**: "Read 12/12 answers from u6-deploy-workflow-infrastructure-design-plan.md. Resolved an apparent Q1/Q10 tension (same Pi, directory-only split, yet an existing nginx reverse proxy routes environments) by concluding port assignment is a pre-existing host/nginx fact the workflow never manages. Generated infrastructure-design.md and deployment-architecture.md covering host topology, systemd --user process management (identifying a new finding, INFRA-U6-01: loginctl enable-linger is required or the service dies when the deploy SSH session closes), release/shared/current directory layout with 2-release retention, the full deployment sequence including production-only DB backup via a host-side script (no DB credentials touch the workflow), health verification via public URL through nginx with no automatic rollback on failure, the reusable workflow_call interface shared with U5, and Gitea variable/secret naming (PI_MAIN_ADDRESS renamed per user's answer)."

**Context**: CONSTRUCTION — Round 3 — U6 Infrastructure Design, Steps 6-8 complete; awaiting approval to proceed to Code Generation

---
## Infrastructure Design — U6 Deploy Workflow (Approved)

**Timestamp**: 2026-07-28T00:25:00Z

**User Input**: "Continue to Next Stage"

**AI Response**: "Infrastructure Design for U6 approved. Proceeding to Code Generation, starting with U6 (deploy-scp.yaml, implementing the just-approved interface) then U5 (continuous_integration.yaml, which calls it), since U5 depends on U6's concrete interface."

**Context**: CONSTRUCTION — Round 3 — Infrastructure Design U6 marked complete; entering Code Generation for U6

---
## Code Generation Plan — U6 Deploy Workflow (Planning)

**Timestamp**: 2026-07-28T00:30:00Z

**User Input**: "(implicit — continuing after Infrastructure Design approval)"

**AI Response**: "Created code generation plan for U6 (3 steps: generate deploy-scp.yaml, validate YAML, generate documentation), presenting for approval before generation starts."

**Context**: CONSTRUCTION — Round 3 — U6 Code Generation Part 1 (Planning), awaiting plan approval

---
## Code Generation Plan — U6 Deploy Workflow (Approved)

**Timestamp**: 2026-07-28T00:32:00Z

**User Input**: "Approve Plan"

**AI Response**: "Plan approved. Proceeding to Code Generation Part 2 for U6."

**Context**: CONSTRUCTION — Round 3 — U6 Code Generation Part 1 complete, entering Part 2 (Generation)

---
## Code Generation — U6 Deploy Workflow (Complete)

**Timestamp**: 2026-07-28T00:40:00Z

**User Input**: "(implicit — plan approved, generation executed)"

**AI Response**: "Generated .gitea/workflows/deploy-scp.yaml (7 workflow_call inputs, 1 job, 8 steps) implementing the approved Infrastructure Design. Validated YAML syntax with PyYAML (confirmed the 'on:' key resolves to boolean True under YAML 1.1 rules, matching the reference project's own working deploy.yaml — a parser quirk, not a defect). Documented in construction/u6-deploy-workflow/code/generation-summary.md. No C# test project applies to this Pipeline-type unit."

**Context**: CONSTRUCTION — Round 3 — U6 Code Generation Part 2 complete, presenting completion message

---
## Code Generation — U6 Deploy Workflow (Approved)

**Timestamp**: 2026-07-28T00:45:00Z

**User Input**: "Continue to Next Stage"

**AI Response**: "U6 Code Generation approved. Committed as two commits: 9a77eec (Infrastructure Design) and bd2a963 (Code Generation — deploy-scp.yaml). Updated aidlc-state.md. Proceeding to Code Generation planning for U5 CI Workflow & Quality Gates."

**Context**: CONSTRUCTION — Round 3 — U6 fully complete; entering U5 Code Generation

---
## Code Generation Plan — U5 CI Workflow & Quality Gates (Planning + partial execution)

**Timestamp**: 2026-07-28T01:10:00Z

**User Input**: "(implicit — continuing after U6 approval)"

**AI Response**: "Investigated FR-21 (lint) and FR-22 (vulnerable packages) directly, since resolving them required live toolchain output rather than design work: fixed the current pnpm lint state (5 errors + 1 warning from FR-21's list, plus 2 additional problems found by drift — badge.tsx and a previously-hidden SetStatusDialog effect the React Compiler plugin could not reach until the watch() incompatibility was fixed), and pinned Microsoft.OpenApi (2.11.0) and System.Security.Cryptography.Xml (10.0.10) via live NuGet advisory lookups, closing OPEN-03. Verified: 372 backend tests, 237 frontend tests, tsc clean, frontend build clean, 0 vulnerable packages solution-wide. Created u5-ci-workflow-code-generation-plan.md documenting both completed steps plus the pending step (the CI workflow YAML itself), including a new mechanism decision (REF-U5-01): the REF-U3-01 gate cannot read the live host env var per D-16, so it is implemented against a parallel pair of Gitea variables that must be kept in sync with the host manually. Presenting for approval before writing continuous_integration.yaml."

**Context**: CONSTRUCTION — Round 3 — U5 Code Generation Part 1, prerequisite fixes done and verified; awaiting approval for the CI workflow YAML itself

---
## Code Generation Plan — U5 (Approved)

**Timestamp**: 2026-07-28T01:15:00Z

**User Input**: "Approve Plan"

**AI Response**: "Proceeding to generate continuous_integration.yaml."

**Context**: CONSTRUCTION — Round 3 — U5 Code Generation Part 2 starting

---
## Code Generation — U5 CI Workflow & Quality Gates (Complete)

**Timestamp**: 2026-07-28T01:40:00Z

**User Input**: "(implicit — plan approved, generation executed)"

**AI Response**: "Generated .gitea/workflows/continuous_integration.yaml (12 jobs). Discovered and resolved REF-U5-01 during generation: the REF-U3-01 gate's design assumed the CI job could read the backend's live SecurityHeaders:AllowedScriptOrigins, but per D-16 that's a host env var invisible to the runner — resolved with a parallel Gitea variable pair that must be kept in sync with the host manually, carried to Operations. Clarified the artifact model: frontend-build is a standalone PR gate; the real per-environment artifacts come from dotnet publish, which triggers the embedded admin SPA build via the existing MSBuild target. Validated YAML (12 jobs, deploy-production confirmed unreachable without workflow_dispatch+flag). Re-confirmed full verification: 372 backend tests, 237 frontend tests, tsc clean, frontend build clean, lint clean, 0 vulnerable packages. Documented in construction/u5-ci-workflow/code/generation-summary.md."

**Context**: CONSTRUCTION — Round 3 — U5 Code Generation complete, presenting completion message

---