# Phase 10 Implementation Report

## Executive status

The RentalDriveGo repository foundation is implemented and buildable. It imports and validates the complete Phase 9 package, establishes server-rendered locale/direction/theme/metadata behavior, enforces a nonce-based CSP, pins the runtime and dependency graph, and includes CI, unit, browser, accessibility, visual, audit, and custom contract gates.

**Phase 10 engineering scaffold status: complete with environmental verification exceptions.**

**Public release status: blocked.** Critical and high Phase 9 product, research, legal, localization, analytics, CRM, evidence, and branding issues remain open. The repository deliberately emits `noindex` and disallows crawling until release approval is explicitly enabled.

## Phase 9 package audit

The uploaded package was extracted with path-safety checks and treated as immutable input.

- Supplied Phase 9 validator: passed, 38 checks over 19 targets.
- Manifest: 61 payload entries.
- Size and SHA-256 verification: every manifested entry matched.
- Extracted package count: 62 files because the package manifest does not list itself.
- Immutable copy: `contracts/phase9`.

No authoritative Phase 9 file was edited during the RentalDriveGo rename.

## Architecture delivered

- Next.js 16.2.9 App Router and React 19.2.7.
- Dynamic SSR for locale pages because per-request CSP nonces are required.
- Strict TypeScript 6.0.3.
- CSS Modules plus exact Phase 9 semantic token CSS.
- Server-first component boundary with client code limited to locale/theme interaction.
- Vendor-neutral OCI standalone deployment artifact.
- Node.js 24.17.0 and pnpm 11.9.0 pinned in repository, CI, and container.
- Exact direct dependency versions and frozen transitive lockfile.

The accepted decision is recorded in `docs/architecture/ADR-0001_REPOSITORY_FOUNDATION.md`.

## Imported contract package

The repository contains:

- immutable complete Phase 9 package under `contracts/phase9`;
- implementation locale catalogs for EN, FR, and AR;
- route manifest;
- exact design tokens and semantic CSS;
- component TypeScript contracts;
- analytics contract and event specification;
- demo-form contract;
- performance budgets;
- visual-regression scenarios;
- QA matrices, browser policy draft, accessibility checklist, and acceptance specifications.

Runtime copies are placed under `src/contracts/phase9`. The original package remains the historical authority when a runtime copy is transformed for module naming or product branding.

## Application shell delivered

- Locale routes `/en`, `/fr`, `/ar`.
- Root negotiation from cookie, then `Accept-Language`, then English.
- Server-rendered `lang` and document-level `dir`.
- Server-readable theme preference with light/dark/system support.
- Pre-paint nonce-bearing theme bootstrap.
- CSP nonce propagated through the Next.js request lifecycle.
- Production CSP without `unsafe-inline` or `unsafe-eval`.
- Canonical and complete `hreflang` set, including `x-default`.
- Release-safe robots/noindex behavior.
- Locale switching with approved query-state and hash preservation only.
- Minimal localized shell and skip link, without beginning full homepage section implementation.

## Validation and CI delivered

Custom CI gates detect:

1. Phase 9 checksum or validator failure.
2. Locale key, route, direction, or brand parity failure.
3. Route/canonical/`hreflang` divergence.
4. Token drift or raw brand-color introduction.
5. Physical left/right CSS declarations.
6. Placeholder destinations, simulated production success, or research-only production behavior.

The GitHub Actions workflow runs validation, formatting, linting, strict type checking, unit coverage, package audit, production build, Playwright functional tests, accessibility scans, and visual regression. Dependabot proposes reviewed weekly dependency and action updates.

## Actual execution results

Passed locally:

- Phase 9 supplied package validator.
- All Phase 9 file size and SHA-256 checks.
- Seven repository validators, including the Phase 10 package manifest gate.
- Prettier check.
- ESLint with zero warnings.
- Strict TypeScript check.
- 9 unit tests across 3 files.
- Unit coverage: 95.31% statements, 89.18% branches, 100% functions, 94.64% lines.
- Production build and standalone asset preparation.
- HTTP server-rendered shell smoke check.
- Package audit at low severity threshold with no known vulnerabilities.

Environment-blocked locally:

- Managed Chromium has an administrator `URLBlocklist` of `*`, causing `ERR_BLOCKED_BY_ADMINISTRATOR` for loopback pages.
- Playwright browser download fallback failed because `cdn.playwright.dev` DNS resolution returned `EAI_AGAIN`.
- The host exposes Node.js 22.16.0, while the repository, CI, and OCI target are pinned to Node.js 24.17.0.

Therefore browser, accessibility, visual-baseline, and exact-target-runtime evidence must pass in CI before Phase 11 acceptance. These are recorded as open verification gates rather than falsely marked passed.

Detailed machine-readable and narrative results are in `docs/quality/VALIDATION_RESULTS_v1.0.*`.

## Corrections made during implementation

Initial dependency selection used ESLint 10, but the pinned React/Next lint ecosystem was not compatible. ESLint was pinned to 9.39.4 instead of forcing incompatible peers.

Next.js experimental typed routes generated a JSX namespace conflict with the pinned React and TypeScript types. The experiment was removed; deterministic route-manifest validation remains the route-safety authority.

The first standalone test command used `next start`, which conflicts with Next's standalone output mode. The build now prepares static/public assets inside the standalone bundle and starts the generated Node server directly.

The initial CSP style rule permitted `unsafe-inline`. It was replaced by a request nonce, and inline `colorScheme` mutation was removed in favor of CSS driven by theme data attributes.

A vulnerable transitive PostCSS resolution was replaced with audited PostCSS 8.5.15 through a workspace override. The final low-threshold package audit is clean.

## Unresolved release gates

P9-010 and P9-017 are closed by this phase. All other Phase 9 issues remain explicit. Phase 10 adds gates for the production canonical origin, final RentalDriveGo visual identity, browser-suite execution, and exact target-runtime verification.

The implementation register is `docs/IMPLEMENTATION_ISSUE_REGISTER_v1.0.csv`.

## Scope boundary respected

No full homepage sections, CRM endpoint, analytics vendor, public pricing, legal consent, login destination, sales address, customer evidence, security marketing claim, or prototype-only behavior was implemented. Omission here is intentional risk control, not missing enthusiasm.
