mountaineering

mountaineering is a skill for Claude Code, Codex from tkellogg/open-strix. It costs 53 tokens per session (1,398 once invoked), scanned A, original, MIT.

A method for improving something measurable through repeated propose, test, keep-or-revert cycles. It applies to prompts, configurations, code, and predictions.

In plain words
What is it for?
Designing and running controlled improvement loops when alternatives can be compared with a reliable score.
Why use it?
It prevents unfocused optimization by requiring a clear goal, consistent measurement, safe experiments, and reversible changes.

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/tkellogg/open-strix/mountaineering
Any agent
npx skills add tkellogg/open-strix --skill mountaineering
Clone the repo
git clone --depth 1 https://github.com/tkellogg/open-strix

Made for: Claude Code, Codex.

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 mountaineering

README.md
[![agentmods](https://agentmods.dev/badge/skills/tkellogg/open-strix/mountaineering.svg)](https://agentmods.dev/skills/tkellogg/open-strix/mountaineering)
Your own site
<a href="https://agentmods.dev/skills/tkellogg/open-strix/mountaineering"><img src="https://agentmods.dev/badge/skills/tkellogg/open-strix/mountaineering.svg" alt="Measured on agentmods" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,398 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 5.1 $0.00053 $0.01398
Opus 5 $0.00026 $0.00699
Sonnet 5 $0.00011 $0.00280
Haiku 4.5 $0.00005 $0.00140

Measured 5d ago against content hash b9e7ec473bb0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

mountaineering 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 5d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (climber.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

open_strix/builtin_skills/mountaineering/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mountaineering

The mountaineering skill teaches agents how to climb hills. For any hill that can be identified, set up guardrails and climb it.

This is autoresearch applied as a discipline: assess the mountain, choose the route, pack the right gear, know when to turn back.

The Five Laws

Every successful climb requires five conditions to hold. See laws.md for the full treatment with examples and failure modes.

  1. Orderable Outcomes — The optimizer must be able to say "this is better than that"
  2. Measurement Consistency — The metric must score the same way twice
  3. Safe Exploration — Failed experiments must be fully reversible
  4. Scope Separation — The optimizer must not control the evaluation
  5. Informed Search — The optimizer needs domain knowledge to generate targeted hypotheses

If any law is violated, the loop will fail — often expensively.

Four-Phase Architecture

Phase 0: Climb Design

The hardest part of mountaineering is figuring out WHAT to climb. This phase turns "I want to improve X" into a fully specified climb. See climb-design.md for the complete protocol.

Six steps:

  1. Name the objective in plain language — the S5 anchor
  2. Instrument — inventory what data and signals you already have
  3. Candidate metrics — list 2-3 options, evaluate each against Laws 1-2
  4. Mutable surface — define what the climber can change and the blast radius
  5. Mutation types — enumerate edit types for YOUR understanding (not the climber's constraint)
  6. Candidate pipeline — rank what to try first; this becomes program.md's Context section

Without Phase 0, you arrive at pre-flight with a vague objective and no metric. Pre-flight correctly rejects it, but doesn't help you get ready. Climb design is where you get ready.

Phase 1: Pre-Flight

Run the pre-flight protocol (preflight.md) before starting any climb. Pre-flight is a collaboration between the agent and the operator — the agent runs mechanical checks, the operator provides judgment. A failed pre-flight saves tokens.

Read the full file on GitHub · 102 lines

Files

What ships with it

6 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.

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. 5d ago First seen · 102 lines · 53 tokens per session scan A b9e7ec473bb0

Subscribe to this mod's changes

mountaineering is a skill published in the GitHub repository tkellogg/open-strix (85 stars, last pushed 1mo ago), licensed MIT. It adds 53 tokens to every session and 1,398 once invoked, about $0.0003 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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