Implementation Plan: File Storage Management & UI

Branch: 014-file-storage-ui | Date: 2026-01-24 | Spec: specs/014-file-storage-ui/spec.md Input: Feature specification from specs/014-file-storage-ui/spec.md

Summary

This feature implements a managed file storage system for dashboard backups and exported repositories. It introduces a configurable storage root (defaulting to outside the workspace) and a Web UI to list, upload, download, and delete files. The system enforces a structured layout with backups/ and repositories/ subdirectories to keep artifacts organized. The UI supports hierarchical folder navigation (e.g., backups/SS2/DashboardName), allowing users to browse, download, and manage files within nested directories.

Technical Context

Language/Version: Python 3.9+ (Backend), Node.js 18+ (Frontend) Primary Dependencies: FastAPI (Backend), SvelteKit (Frontend) Storage: Local Filesystem (for artifacts), Config (for storage path) Testing: pytest (Backend), vitest/playwright (Frontend - implied) Target Platform: Linux server Project Type: Web application Performance Goals: File list load < 1s for 100 files, supports 50MB+ uploads Constraints: Must prevent path traversal, must not pollute git repo Scale/Scope: ~2-3 backend endpoints, 1-2 frontend pages/components

Constitution Check

GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.

I. Semantic Protocol Compliance:
- Status: PASSED
- Check: Will use [DEF] anchors and @RELATION tags.
- Check: Will follow File Structure Standard.
II. Causal Validity (Contracts First):
- Status: PASSED
- Check: Contracts will be defined in specs/014-file-storage-ui/contracts/ before implementation.
III. Immutability of Architecture:
- Status: PASSED
- Check: No changes to immutable architectural constraints expected.
IV. Design by Contract (DbC):
- Status: PASSED
- Check: Functions will define @PRE and @POST conditions.
V. Belief State Logging:
- Status: PASSED
- Check: Will use standard logging patterns.
VI. Fractal Complexity Limit:
- Status: PASSED
- Check: Feature scope is small, unlikely to exceed complexity limits.
VII. Everything is a Plugin:
- Status: PASSED
- Check: New functionality will be implemented as a StoragePlugin (or similar) inheriting from PluginBase.

Project Structure

Documentation (this feature)

specs/014-file-storage-ui/
├── plan.md              # This file
├── research.md          # Phase 0 output
├── data-model.md        # Phase 1 output
├── quickstart.md        # Phase 1 output
├── contracts/           # Phase 1 output
└── tasks.md             # Phase 2 output

Source Code (repository root)

backend/
├── src/
│   ├── api/
│   │   └── routes/
│   │       └── storage.py      # New route handler
│   ├── plugins/
│   │   └── storage.py          # New plugin implementation
│   └── models/
│       └── storage.py          # Pydantic models (StoredFile, StorageConfig)
└── tests/
    └── test_storage.py         # Backend tests

frontend/
├── src/
│   ├── routes/
│   │   └── storage/
│   │       └── +page.svelte    # Main storage UI
│   ├── components/
│   │   └── storage/
│   │       ├── FileList.svelte # Component for listing files and folders (explorer view)
│   │       ├── Breadcrumbs.svelte # Component for navigation
│   │       └── FileUpload.svelte # Component for uploading
│   └── services/
│       └── storageService.js   # Frontend API client

Structure Decision: Standard Web Application structure (Backend + Frontend) with Plugin architecture for the backend logic.

Complexity Tracking

Fill ONLY if Constitution Check has violations that must be justified

Violation	Why Needed	Simpler Alternative Rejected Because
N/A

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