Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add felixrieseberg/claude-coach --skill skillgit clone --depth 1 https://github.com/felixrieseberg/claude-coachWrote 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.
[](https://agentmods.dev/skills/felixrieseberg/claude-coach/skill)<a href="https://agentmods.dev/skills/felixrieseberg/claude-coach/skill"><img src="https://agentmods.dev/badge/skills/felixrieseberg/claude-coach/skill/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/skills/felixrieseberg/claude-coach/skill"><img src="https://agentmods.dev/badge/skills/felixrieseberg/claude-coach/skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00068 | $0.04658 |
| Opus 5 | $0.00034 | $0.02329 |
| Sonnet 5 | $0.00014 | $0.00932 |
| Haiku 4.5 | $0.00007 | $0.00466 |
Grade C, and why
coach scanned grade C with 1 finding 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 9d 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.
Harvests environment variableshighData exfiltration
Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.
2. **If Strava:** Check for existing database, gather credentials if needed, run sync How it starts
The opening of the file, as written. The whole thing — 547 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Coach: Endurance Training Plan Skill
You are an expert endurance coach specializing in triathlon, marathon, and ultra-endurance events. Your role is to create personalized, progressive training plans that rival those from professional coaches on TrainingPeaks or similar platforms.
Initial Setup (First-Time Users)
Before creating a training plan, you need to understand the athlete's current fitness. There are two ways to gather this information:
Step 1: Check for Existing Strava Data
First, check if the user has already synced their Strava data:
ls ~/.claude-coach/coach.db
If the database exists, skip to "Database Access" to query their training history.
Step 2: Ask How They Want to Provide Data
If no database exists, use AskUserQuestion to let the athlete choose:
questions:
- question: "How would you like to provide your training data?"
header: "Data Source"
options:
- label: "Connect to Strava (Recommended)"
description: "Copy tokens from strava.com/settings/api - I'll analyze your training history"
- label: "Enter manually"
description: "Tell me about your fitness - no Strava account needed"
Option A: Strava Integration
If they choose Strava, first check if database already exists:
ls ~/.claude-coach/coach.db
If the database exists: Skip to "Database Access" to query their training history.
If no database exists: Guide the user through Strava authorization.
Step 1: Get Strava API Credentials
Use AskUserQuestion to get credentials:
questions:
- question: "Go to strava.com/settings/api - what is your Client ID?"
header: "Client ID"
options:
- label: "I have my Client ID"
description: "Enter the numeric Client ID via 'Other'"
- label: "I need to create an app first"
description: "Click 'Create an app', set callback domain to 'localhost'"
Then ask for the secret:
questions:
- question: "Now enter your Client Secret from the same page"
header: "Client Secret"
options:
- label: "I have my Client Secret"
description: "Enter the secret via 'Other'"
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 547 lines · 68 tokens per session scan C 6fe4ad41a92f
coach is a skill published in the GitHub repository felixrieseberg/claude-coach (181 stars, last pushed 8mo ago), licensed MIT. It adds 68 tokens to every session and 4,658 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 1 finding (harvests environment variables). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
archify
Create polished, validated architecture, workflow, sequence, data-flow, and lifecycle/state diagrams as explorable standalone HTML with inline SVG, dark/light themes, optional trace motion, and PNG/JPEG/WebP/SVG/WebM export. Accept plain-language requirements or pasted Mermaid flowchart, sequenceDiagram, and…
vox-director
Turn ONE topic into a finished Vox-style paper-collage explainer / ad video, end to end on the Atlas Cloud API + local ffmpeg — script, collage keyframes, motion, voice-over, music, captions, all automated. Use this whenever the user wants a "Vox style" video, a paper/torn-paper collage animation, a "motion collage"…
social-post
A workflow for planning, writing, publishing, and evaluating social-media posts in the user's established voice. It covers Facebook, Instagram, YouTube, Threads, and X, including selected comment operations.
higgsfield
Use this skill whenever the user asks anything about Higgsfield AI — writing or refining video/image prompts, choosing a model (Kling, Sora 2, Veo, Wan, Seedance, Minimax Hailuo, DoP, Soul, Nano Banana, Seedream, Flux, GPT Image, etc.), camera controls, named motion presets, Soul ID character consistency, Cinema…
higgsfield-troubleshoot
Use when a Higgsfield generation fails, produces poor quality, looks wrong, doesn't match the prompt, or the user needs to fix or improve an output.
higgsfield-motion-design
End-to-end motion-design / animated-ad creation flow on Higgsfield via the MCP connector. Use when the user wants to create motion design, animate a logo, make a video from an image, build an animated ad or brand promo, turn a product into motion, or says 'make a motion', 'motion design', 'animate this', 'make a video…