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.

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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.

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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.

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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.

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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.

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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).

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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.

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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.

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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.

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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).

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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.

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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).

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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.

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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.

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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.

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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

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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.

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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.

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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.

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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.

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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.

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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.

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