FitTrack_ReportGenerator/specs/001-create-a-new/plan.md

Implementation Plan: [FEATURE]

Branch: [###-feature-name] | Date: [DATE] | Spec: [link] Input: Feature specification from /specs/[###-feature-name]/spec.md

Note: This template is filled in by the /speckit.plan command. See .specify/templates/commands/plan.md for the execution workflow.

Summary

[Extract from feature spec: primary requirement + technical approach from research]

Technical Context

Language/Version: Python 3.11
Primary Dependencies: FastAPI, pandas, numpy, scipy, matplotlib, fitparse, tcxparser, gpxpy
Storage: PostgreSQL (for user data and analysis results)
Testing: pytest
Target Platform: Linux server
Project Type: web
Performance Goals: Analysis of a typical 2-hour workout file MUST complete in under 30 seconds; processing a batch of 100 workout files concurrently without generating errors or significant performance degradation.
Constraints: Public API (no authentication); errors reported as JSON objects; best effort service availability.
Scale/Scope: Batch analysis of up to 100 workout files concurrently; configurable FTP per user account.

Constitution Check

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

Principle	Status	Justification (if violation)
I. Library-First	Aligned	Core analysis logic will be implemented as a reusable library.
II. CLI Interface	VIOLATION	The primary interface is an API, not a CLI. Justification: The feature is designed as a web service with API endpoints for integration. A CLI could be added later if needed for specific use cases, but it's not the primary requirement for this feature.
III. Test-First (NON-NEGOTIABLE)	Aligned	User scenarios and acceptance criteria are defined, supporting a test-first approach.
IV. Integration Testing	Aligned	API endpoints and batch processing necessitate integration tests.
V. Observability	Aligned	Error reporting and service availability imply the need for observability.
VI. Versioning & Breaking Changes	Aligned	Will consider API versioning as part of the design.
VII. Simplicity	Aligned	Focus on core analysis functionality.

Project Structure

Documentation (this feature)

specs/[###-feature]/
├── 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)

src/
├── core/
│   ├── batch_processor.py
│   ├── chart_generator.py
│   ├── file_parser.py
│   ├── logger.py
│   ├── report_generator.py
│   ├── workout_analyzer.py
│   └── workout_data.py
├── db/
│   ├── models.py
│   └── session.py
└── utils/
    └── zone_calculator.py

api/
├── routers/
│   └── analysis.py
├── main.py
└── schemas.py

tests/
├── unit/
│   ├── test_batch_processor.py
│   ├── test_chart_generator.py
│   ├── test_fit_parser.py
│   ├── test_gpx_parser.py
│   ├── test_tcx_parser.py
│   └── test_workout_data.py
├── integration/
└── contract/
    ├── test_analyze_workout_api.py
    ├── test_batch_analysis_api.py
    └── test_charts_api.py
├── performance/
│   └── test_performance.py

Structure Decision: The project will use a src/ directory for core logic, api/ for the FastAPI application, and tests/ for all testing types. This aligns with a modular web application structure.

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]