week

A weekly training-summary skill for calculating activity volume, comparing weeks, showing fitness trends, and previewing upcoming workouts. It can use Strava activity data and, when configured, Intervals.icu planning and fitness data.

In plain words
What is it for?
Use it to summarize weekly mileage, duration, elevation, completed versus planned runs, changes from last week, fitness trends, and next week's workouts.
Why use it?
It turns scattered workout and plan records into a recurring view of what was completed, how it compares with the previous week, and what comes next.

Skill for Claude CodeCodex

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.

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

Made for: Claude Code, Codex.

Per session 14 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 376 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00014 $0.00376
Opus 5 $0.00007 $0.00188
Sonnet 5 $0.00003 $0.00075
Haiku 4.5 $0.00001 $0.00038

Measured 2d ago against content hash 8acd3069c9d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

week 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 2d 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/skills/week/SKILL.md · 33 lines

What it actually says

/week — Weekly Summary

  1. Determine the current week (Monday–Sunday). Read knowledge/volume-progression.md for safe ramp rates and recovery week guidelines, and knowledge/periodization.md for training phase context.
    • If only Strava is configured, summarize completed-activity volume and recent activity patterns. State that plan compliance, wellness, and fitness metrics require Intervals.icu.
  2. Fetch data using MCP tools (call them directly, in parallel where possible):
    • Activities endpoint for this week
    • Events endpoint for this week (planned)
    • Activities endpoint for last week (for comparison)
    • Events endpoint for next week (preview)
    • Fitness endpoint for the last 14 days (trend)
  3. Display:
    • This Week:
      • Total miles, duration, elevation gain
      • Number of runs completed vs planned
      • Compliance rate (% of planned workouts completed)
    • vs Last Week:
      • Miles change (absolute and %)
      • Flag if > 10% increase
    • Fitness Trend (14-day):
      • CTL, ATL, TSB current values and direction
    • Next Week Preview:
      • List upcoming planned workouts (name, type, distance/duration)
      • Total planned miles
  4. End with a brief coaching note on the week, grounded in training science:
    • If volume increased >10%: flag per knowledge/volume-progression.md
    • If compliance is low: consider if it signals fatigue per knowledge/recovery-overtraining.md
    • Preview next week in context of periodization principles from knowledge/periodization.md
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. 2d ago First seen · 33 lines · 14 tokens per session scan A 8acd3069c9d7

Subscribe to this mod's changes

week is a skill published in the GitHub repository rlacombe/switchback-running (11 stars, last pushed 7d ago), licensed MIT. It adds 14 tokens to every session and 376 once invoked, about $0.0001 per session on Opus 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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