Simple HTTP Auth designed

specs/005-simple-http-auth/plan.md

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+# Implementation Plan: Simple HTTP Auth
+
+**Branch**: `005-simple-http-auth` | **Date**: October 13, 2025 | **Spec**: D:/Coding/unisono/specs/005-simple-http-auth/spec.md
+**Input**: Feature specification from `/specs/005-simple-http-auth/spec.md`
+
+**Note**: This template is filled in by the `/speckit.plan` command. See `.specify/templates/commands/plan.md` for the execution workflow.
+
+## Summary
+
+The feature provides a simple HTTP authentication mechanism for the Single Page Application (SPA). Users will be prompted to enter a passphrase, configured via an `.env` file, to gain access. Access will be preserved for the duration of the browser session. Failed attempts will not be rate-limited, and if the passphrase is missing or invalid in the `.env` file, the application will default to no authentication. Authentication attempts (success/failure) will be logged to a text file. User management, password reset, and multi-factor authentication are explicitly out-of-scope.
+
+## Technical Context
+
+**Language/Version**: Node.js (LTS), TypeScript 5.x
+**Primary Dependencies**: React, Material-UI / MUI, WebSocket library, Express.js
+**Storage**: Ephemeral server-side storage (in-memory/session store) for encrypted session data, `.env` file for passphrase.
+**Testing**: `npm test`
+**Target Platform**: Web (SPA)
+**Project Type**: Web application (frontend + backend)
+**Performance Goals**: No specific target for passphrase validation.
+**Constraints**: Access preserved during browser session.
+**Scale/Scope**: Simple HTTP authentication for a single SPA.
+
+## Constitution Check
+
+*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*
+
+The plan aligns with the project constitution:
+
+- **I. Conventions**: The plan adheres to existing project conventions by using Node.js/TypeScript, React, Material-UI, Express.js, and the established `backend/` and `frontend/` structure.
+- **II. Libraries/Frameworks**: The plan explicitly lists primary dependencies (React, Material-UI / MUI, WebSocket library, Express.js) which are established in `GEMINI.md`.
+- **III. Style & Structure**: The plan follows the existing `backend/` and `frontend/` structure and uses TypeScript, aligning with the project's established patterns.
+- **IV. Idiomatic Changes**: The plan proposes changes that integrate naturally within the existing web application structure.
+- **V. Comments**: This is a code-level principle, not directly applicable to the plan document itself, but the plan doesn't suggest violating it.
+
+**Quality Gates Alignment:**
+
+- **I. Proactiveness**: The tasks include unit/integration and end-to-end tests for both user stories.
+- **II. Verification (Tests)**: The plan specifies `npm test` for testing, consistent with `GEMINI.md`.
+- **III. Verification (Standards)**: The plan implies adherence to these standards by using TypeScript and `npm test`.
+
+**Status**: All principles and quality gates are aligned.
+
+## Project Structure
+
+### Documentation (this feature)
+
+```
+specs/005-simple-http-auth/
+├── plan.md              # This file (/speckit.plan command output)
+├── research.md          # Phase 0 output (/speckit.plan command)
+├── data-model.md        # Phase 1 output (/speckit.plan command)
+├── quickstart.md        # Phase 1 output (/speckit.plan command)
+├── contracts/           # Phase 1 output (/speckit.plan command)
+└── tasks.md             # Phase 2 output (/speckit.tasks command - NOT created by /speckit.plan)
+```
+
+### Source Code (repository root)
+
+```
+backend/
+├── src/
+│   ├── models/
+│   ├── services/
+│   ├── api/
+│   └── ws/
+└── tests/
+
+frontend/
+├── src/
+│   ├── components/
+│   ├── pages/
+│   └── services/
+└── tests/
+```
+
+**Structure Decision**: The project uses a web application structure with separate `backend/` and `frontend/` directories. The authentication logic will primarily reside in the `backend/` for validation and session management, and the `frontend/` will handle the passphrase input and display.
+
+## Complexity Tracking
+
+*Fill ONLY if Constitution Check has violations that must be justified*
+
+| Violation | Why Needed | Simpler Alternative Rejected Because |
+|-----------|------------|-------------------------------------|
+| [e.g., 4th project] | [current need] | [why 3 projects insufficient] |
+| [e.g., Repository pattern] | [specific problem] | [why direct DB access insufficient] |