why

why is a skill for Claude Code from rlacombe/switchback-running. It costs 9 tokens per session (155 once invoked), scanned A, original, MIT.

A command that explains the research behind a training choice, such as interval workouts, tapering, recovery, or nutrition.

In plain words
What is it for?
Use it to investigate training concepts, workout choices, performance problems, recovery, injury prevention, and race preparation.
Why use it?
It turns expert training information into an explanation of why a decision may help and how it relates to the athlete’s situation.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Good fit Use it to investigate training concepts, workout choices, performance problems, recovery, injury prevention, and race preparation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rlacombe/switchback-running/why
Install

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.

Any agent
npx skills add rlacombe/switchback-running --skill why
Clone the repo
git clone --depth 1 https://github.com/rlacombe/switchback-running

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.

agentmods badge for why

README.md
[![agentmods](https://agentmods.dev/badge/skills/rlacombe/switchback-running/why/github.svg)](https://agentmods.dev/skills/rlacombe/switchback-running/why)
Your own site
<a href="https://agentmods.dev/skills/rlacombe/switchback-running/why"><img src="https://agentmods.dev/badge/skills/rlacombe/switchback-running/why/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.

agentmods 80×15 button for why

Your own site · 80×15
<a href="https://agentmods.dev/skills/rlacombe/switchback-running/why"><img src="https://agentmods.dev/badge/skills/rlacombe/switchback-running/why.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 9 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 155 The whole file, excluding the scripts and references it only reads on demand.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00009 $0.00155
Opus 5.5 $0.00004 $0.00062
Sonnet 5.5 $0.00002 $0.00031
Haiku 4.5 $0.00001 $0.00015

Measured 1mo ago against content hash c16cd1ce381a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

why 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.

skills/why/SKILL.md · 19 lines

What it actually says

Explain the Evidence

Identify the exact decision or claim. Retrieve the athlete evidence used for it and the smallest relevant set of knowledge chapters. Distinguish peer-reviewed evidence, documented coaching frameworks, athlete-specific observations, derived analysis, and hypotheses. When credible sources disagree, explain the practical difference, assumptions, and relevance to this athlete. Do not invent citations or attribute a precise threshold without a source. End with what the evidence changes in practice and what remains uncertain.

Use the same athlete files and provider calls that supported the original decision. If they were never retrieved or are stale, retrieve them before claiming they support the explanation.

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.

  1. 1mo ago Changed · -38 lines · -5 tokens per session c16cd1ce381a
  2. 1mo ago First seen · 57 lines · 14 tokens per session scan A c9e7b4db45a2

Subscribe to this mod's changes

why is a skill published in the GitHub repository rlacombe/switchback-running (10 stars, last pushed 1mo ago), licensed MIT. It adds 9 tokens to every session and 155 once invoked, about $0.0000 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 2026-08-30.

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