---
kind: record
status: active
---

# QA Report — Gateway Security Hardening

## Scope

- Chat HTTP auth guard hardening
- Chat WebSocket session validation
- DTO validation rules for chat and conversation payloads
- Ownership regression coverage for by-id routes

## TDD

- Required: yes
- Applied: yes
- Red step: targeted tests failed on socket session reshaping and DTO role/length mismatches
- Green step: targeted tests passed after runtime and DTO alignment

## Baseline Verification

| Command                                                                                                                        | Result | Evidence                                      |
| ------------------------------------------------------------------------------------------------------------------------------ | ------ | --------------------------------------------- |
| `pnpm --filter @mosaicstack/gateway test -- src/chat/__tests__/chat-security.test.ts src/__tests__/resource-ownership.test.ts` | pass   | 3 test files passed, 20 tests passed          |
| `pnpm typecheck`                                                                                                               | pass   | turbo completed 18/18 package typecheck tasks |
| `pnpm lint`                                                                                                                    | pass   | turbo completed 18/18 package lint tasks      |
| `pnpm format:check`                                                                                                            | pass   | `All matched files use Prettier code style!`  |

## Situational Verification

| Acceptance Criterion                                   | Verification Method                      | Evidence                                                                                         |
| ------------------------------------------------------ | ---------------------------------------- | ------------------------------------------------------------------------------------------------ |
| Chat controller requires auth and current-user context | source assertion test                    | `chat-security.test.ts` checks `@UseGuards(AuthGuard)` and `@CurrentUser() user: { id: string }` |
| WebSocket handshake requires Better Auth session       | unit tests for `validateSocketSession()` | null handshake returns `null`; valid handshake returns original session object                   |
| Conversation messages reject non-user/assistant roles  | class-validator test                     | `system` role fails validation                                                                   |
| Conversation messages enforce a 32k max length         | class-validator test                     | `32_001` chars fail validation                                                                   |
| Chat request payload enforces a 10k max length         | class-validator test                     | `10_001` chars fail validation                                                                   |
| By-id routes reject cross-user access                  | ownership regression tests               | conversations, projects, missions, tasks each raise `ForbiddenException` for non-owner access    |

## Residual Risk

- No live HTTP or WebSocket smoke test against a running gateway process was executed in this session.
