What is loopback-training-server CLAUDE.md?

Project instructions for the Loopback training server, a workout-tracking system with a web dashboard, APIs, and Apple Watch integration.

Use them when changing the backend, frontend, database, training API, mobile-app data formats, or Docker setup.

They document the system structure and warn that the companion iOS app defines part of the shared API contract.

How aderaaij/loopback-training-server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to aderaaij/loopback-training-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/aderaaij/loopback-training-server/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/aderaaij/loopback-training-server

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/aderaaij/loopback-training-server/claude-md/github.svg)](https://agentmods.dev/instructions/aderaaij/loopback-training-server/claude-md)

Your own site

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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

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Per session 8,551 This file is loaded in full into every session.

When invoked 8,551 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.08551	$0.08551
Opus 5.5	$0.03420	$0.03420
Sonnet 5.5	$0.01710	$0.01710
Haiku 4.5	$0.00855	$0.00855

Measured 1mo ago against content hash c9065cecf68e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

loopback-training-server CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 299 lines

How it starts

The opening of the file, as written. The whole thing — 299 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Training API

Personal workout tracking API with Apple Watch integration queue, training plans, health metrics, and a web dashboard.

The companion iOS app lives at aderaaij/loopback-training-app; a working copy is usually checked out as a sibling directory (../loopback-training-app). Cross-reference it for the client side of the API contract (WorkoutAPIClient.swift, SessionStore.swift, WorkoutScheduleManager.swift) before changing wire formats — and git pull it first, since development happens elsewhere.

Tech Stack

Backend: FastAPI (Python 3.13) with Uvicorn
Database: PostgreSQL 16 with SQLAlchemy 2.0 ORM, Alembic migrations
Package manager: uv
Frontend: React 19 + TypeScript SPA ("Loopback", in frontend/) — Vite 8, React Compiler, TanStack Query, react-router, hand-rolled SVG charts, Leaflet route maps
MCP Server: FastMCP 2.0 (in mcp/)
Infrastructure: Docker Compose (docker-compose.yml)

Project Structure

backend/
  app/
    main.py              # FastAPI app entry point (+ serves the SPA build, see below)
    auth.py              # Bearer token auth
    config.py            # Pydantic-settings
    database.py          # SQLAlchemy setup
    models/              # ORM models
    routes/              # API route handlers
    schemas/             # Pydantic request/response schemas
  migrations/            # Alembic migrations
  Dockerfile             # Multi-stage build: Node (frontend) + uv (backend); context = repo root
frontend/
  src/
    lib/                 # api client, wire types, auth context, query hooks, formatters
    components/          # layout, shared UI, SVG chart primitives, route map
    screens/             # one file per screen (Overview, Calendar, Workouts, Plans, Notes, Health, Queue, Settings, Users)
    styles/              # global design tokens + per-screen CSS
mcp/
  app/
    main.py              # FastMCP server entry point
    config.py            # MCP settings
    coaching/            # Coaching playbook content (core.md + goals/*.md) + loader
    tools/               # MCP tool routers (workouts, queue, actions, feedback, health, plans, coaching)
    services/            # HTTP client for backend API

Read the full file on GitHub · 299 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago Changed · +162 tokens per session c9065cecf68e
2mo ago First seen · 299 lines · 8,389 tokens per session scan A ff4af9e2c211

Subscribe to this mod's changes

loopback-training-server CLAUDE.md is an instructions file published in the GitHub repository aderaaij/loopback-training-server (4 stars, last pushed 1mo ago), licensed MIT. It adds 8,551 tokens to every session, about $0.0342 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

React apple-watch fastapi healthkit mcp-server postgresql

loopback-training-server CLAUDE.md next to 6 instructions from other repositories
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loopback-training-server: Instructions file for Claude Code