phase0: add architecture guardrails, CI gates, per-language AGENTS.md

Non-negotiable structural rules that apply to every Claude Code session in
this repo and to every commit, enforced via three defense-in-depth layers:

  1. PreToolUse hook in .claude/settings.json blocks any Write/Edit that
     would push a file past the 500-line hard cap. Auto-loads for any
     Claude session in this repo regardless of who launched it.
  2. scripts/githooks/pre-commit (installed via scripts/install-hooks.sh)
     enforces the LOC cap, freezes migrations/ unless [migration-approved],
     and protects guardrail files unless [guardrail-change] is present.
  3. .gitea/workflows/ci.yaml gets loc-budget + guardrail-integrity jobs,
     plus mypy --strict on new Python packages, tsc --noEmit on Node
     services, and a syft+grype SBOM scan.

Per-language conventions are documented in AGENTS.python.md / AGENTS.go.md /
AGENTS.typescript.md at the repo root — layering (router->service->repo for
Python, hexagonal for Go, colocation for Next.js), tooling baseline, and
explicit "what you may NOT do" lists.

Adds scripts/check-loc.sh (soft 300 / hard 500, reports 205 hard and 161
soft violations in the current codebase) plus .claude/rules/loc-exceptions.txt
(initially empty — the list is designed to shrink over time).

Per-service READMEs for all 10 services + PHASE1_RUNBOOK.md for the
backend-compliance refactor. Skeleton packages (compliance/{domain,
repositories,schemas}) are the landing zone for the clean-arch rewrite that
begins in Phase 1.

CLAUDE.md is prepended with the six non-negotiable rules.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

AGENTS.typescript.md

@@ -0,0 +1,85 @@
+# AGENTS.typescript.md — TypeScript / Next.js Conventions
+
+Applies to: `admin-compliance/`, `developer-portal/`, `breakpilot-compliance-sdk/`, `consent-sdk/`, `dsms-node/` (where applicable).
+
+## Layered architecture (Next.js 15 App Router)
+
+```
+app/
+├── <route>/
+│   ├── page.tsx              # Server Component by default. ≤200 LOC.
+│   ├── layout.tsx
+│   ├── _components/          # Private folder; not routable. Colocated UI.
+│   │   └── <Component>.tsx   # Each file ≤300 LOC.
+│   ├── _hooks/               # Client hooks for this route.
+│   ├── _server/              # Server actions, data loaders for this route.
+│   └── loading.tsx / error.tsx
+├── api/
+│   └── <domain>/route.ts     # Thin handler. Delegates to lib/server/<domain>/.
+lib/
+├── <domain>/                 # Pure helpers, types, schemas (zod). Reusable.
+└── server/<domain>/          # Server-only logic; uses "server-only" import.
+components/                   # Truly shared, app-wide components.
+```
+
+**Server vs Client:** Default is Server Component. Add `"use client"` only when you need state, effects, or browser APIs. Push the boundary as deep as possible.
+
+## API routes (route.ts)
+
+- One handler per HTTP method, ≤40 LOC.
+- Validate input with `zod`. Reject invalid → 400.
+- Delegate to `lib/server/<domain>/`. No business logic in `route.ts`.
+- Always return `NextResponse.json(..., { status })`. Never throw to the framework.
+
+```ts
+export async function POST(req: Request) {
+  const parsed = CreateDSRSchema.safeParse(await req.json());
+  if (!parsed.success) return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
+  const result = await dsrService.create(parsed.data);
+  return NextResponse.json(result, { status: 201 });
+}
+```
+
+## Page components
+
+- Pages >300 lines must be split into colocated `_components/`.
+- Server Components fetch data; pass plain objects to Client Components.
+- No data fetching in `useEffect` for server-renderable data.
+- State management: prefer URL state (`searchParams`) and Server Components over global stores.
+
+## Types
+
+- `lib/sdk/types.ts` is being split into `lib/sdk/types/<domain>.ts`. Mirror backend domain boundaries.
+- All API DTOs are zod schemas; infer types via `z.infer`.
+- No `any`. No `as unknown as`. If you reach for it, the type is wrong.
+
+## Tests
+
+- Unit: **Vitest** (`*.test.ts`/`*.test.tsx`), colocated.
+- Hooks: `@testing-library/react` `renderHook`.
+- E2E: **Playwright** (`tests/e2e/`), one spec per top-level page, smoke happy path minimum.
+- Snapshot tests sparingly — only for stable output (CSV, JSON-LD).
+- Coverage target: 70% on `lib/`, smoke coverage on `app/`.
+
+## Tooling
+
+- `tsc --noEmit` clean (strict mode, `noUncheckedIndexedAccess: true`).
+- ESLint with `@typescript-eslint`, `eslint-config-next`, type-aware rules on.
+- `prettier`.
+- `next build` clean. No `// @ts-ignore`. `// @ts-expect-error` only with a comment explaining why.
+
+## Performance
+
+- Use `next/dynamic` for heavy client-only components.
+- Image: `next/image` with explicit width/height.
+- Avoid waterfalls — `Promise.all` for parallel data fetches in Server Components.
+
+## What you may NOT do
+
+- Put business logic in a `page.tsx` or `route.ts`.
+- Reach across module boundaries (e.g. `admin-compliance` importing from `developer-portal`).
+- Use `dangerouslySetInnerHTML` without explicit sanitization.
+- Call backend APIs directly from Client Components when a Server Component or Server Action would do.
+- Change a public API route's path/method/schema without updating SDK consumers in the same change.
+- Create a file >500 lines.
+- Disable a lint or type rule globally to silence a finding — fix the root cause.