id: T029
slug: practical-app-demo
name: Practical Application Demo
title: Practical Application Demo (MVP-Alpha E2E Validation)
status: complete
priority: P1
created: 2025-12-11
owner: peerB
tags: [application, integration, e2e, mvp]

objective: |
  Build a practical application on PlasmaCloud platform demonstrating end-to-end functionality.
  Validates that MVP-Alpha (12/12 components) works for real applications per PROJECT.md requirement.

acceptance:
  - Application deploys successfully on platform
  - User can interact with application (CRUD operations)
  - Data persists across restarts (FlareDB)
  - Authentication works (IAM token validation)
  - Metrics visible in Metricstor

steps:
  - step: S5
    name: Minimal API Demo (Option A)
    done: Deploy simple HTTP API with FlareDB + IAM + Metricstor
    status: complete
    owner: peerB
    priority: P1
    notes: |
      Option A selected (minimal viable demo per PeerA preference).

      Components:
      - HTTP API server (Rust/Axum)
      - FlareDB client for key-value storage
      - IAM token validation middleware
      - Prometheus metrics export to Metricstor

      Endpoints:
      - GET /health - health check
      - POST /items - create item (requires auth)
      - GET /items/:id - retrieve item
      - PUT /items/:id - update item (requires auth)
      - DELETE /items/:id - delete item (requires auth)

      Time budget: 2-4 hours (minimal scope)
      Actual: ~2.5 hours (build + E2E validation)

evidence:
  - path: docs/por/T029-practical-app-demo/src/main.rs
    note: HTTP API implementation (254L)
  - path: docs/por/T029-practical-app-demo/target/debug/plasma-demo-api
    note: Binary (127MB)
  - note: E2E validation completed - all 7 test scenarios passed
notes: |
  This validates the final PROJECT.md requirement: "実用的なアプリケーションを作ってみる"
  (build a practical application).

  Demonstrates:
  - IAM authentication/authorization
  - FlareDB persistent storage
  - Metricstor observability
  - Platform E2E functionality