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]

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