nutrition

nutrition is a skill for Claude Code from rlacombe/switchback-running. It costs 10 tokens per session (265 once invoked), scanned A, original, MIT.

A post-run nutrition calculator that totals water, carbohydrates, sodium, and caffeine from an athlete's reported intake. It also compares intake by hour and adds a summary to an Intervals.icu activity, a record in a training platform.

In plain words
What is it for?
Use it after a run to analyze what was consumed, check hourly fueling and hydration, and record the result on the relevant training activity.
Why use it?
It removes the need to calculate fueling totals manually and makes the assumptions behind unknown product data visible.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Good fit Use it after a run to analyze what was consumed, check hourly fueling and hydration, and record the result on the relevant training activity.

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

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/rlacombe/switchback-running/nutrition"><img src="https://agentmods.dev/badge/skills/rlacombe/switchback-running/nutrition.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 10 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 265 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00010 $0.00265
Opus 5.5 $0.00004 $0.00106
Sonnet 5.5 $0.00002 $0.00053
Haiku 4.5 $0.00001 $0.00026

Measured 1mo ago against content hash 98ac345d7061, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nutrition 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/nutrition/SKILL.md · 32 lines

What it actually says

Nutrition and Hydration

Minimum evidence

Read profile, health constraints, event or workout duration and intensity, weather, elevation, carrying capacity, prior intake, tolerance, and rehearsals. Retrieve the relevant activity when reviewing execution.

Use get_events for the planned effort, get_activity or get_strava_activity for completed execution, and get_weather with profile coordinates when conditions matter. Use streams only for a defined analysis.

Knowledge

Read knowledge/nutrition.md and environmental guidance when conditions matter. Distinguish research-supported ranges from coaching heuristics and product labels.

Analysis

Calculate carbohydrates, fluid, sodium, caffeine, and calories in consistent units. Compare hourly intake with duration, conditions, athlete history, and what was practiced. Do not prescribe a universal target, infer sweat rate without measurement, or recommend medication. Apply health triage to confusion, rapid weight change, persistent vomiting, or other warning signs.

Output

Offer a starting range, operational plan, alternatives, and rehearsal or monitoring method. State assumptions and missing evidence. Save only accepted, athlete-specific tolerances and outcomes, not provisional explanations.

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 · -94 lines · -5 tokens per session 98ac345d7061
  2. 1mo ago First seen · 126 lines · 15 tokens per session scan A 3b8ab74fbffb

Subscribe to this mod's changes

nutrition is a skill published in the GitHub repository rlacombe/switchback-running (10 stars, last pushed 1mo ago), licensed MIT. It adds 10 tokens to every session and 265 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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