glm-calibration

glm-calibration is a skill for Claude Code, Codex from benchflow-ai/skillsbench. It costs 32 tokens per session (839 once invoked), scanned A, original, Apache-2.0.

A parameter-fitting guide for GLM, a lake-temperature simulation model. It explains how to adjust light, mixing, wind, radiation, and heat-transfer settings to reduce the difference between simulated and observed temperatures.

In plain words
What is it for?
Use it to tune GLM parameters and evaluate the fit with root mean square error, a measure of average prediction error.
Why use it?
It provides a structured way to improve a simulation when its temperature results do not match measurements.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to tune GLM parameters and evaluate the fit with root mean square error, a measure of average prediction error.

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Install with agentmods
npx agentmods add skills/benchflow-ai/skillsbench/glm-calibration
About the project

SkillsBench is a benchmark for measuring how effectively AI agents use modular skills—folders containing instructions, scripts, and resources—to complete specialized tasks. It helps researchers and developers evaluate both skill quality and agent behavior, including tasks that require combining multiple skills. The catalogue’s skills and instructions are evaluated as part of this workflow.

benchflow-ai/skillsbench · 1,764 stars · on GitHub · skillsbench.ai

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 benchflow-ai/skillsbench --skill glm-calibration
Clone the repo
git clone --depth 1 https://github.com/benchflow-ai/skillsbench

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 glm-calibration

README.md
[![agentmods](https://agentmods.dev/badge/skills/benchflow-ai/skillsbench/glm-calibration/github.svg)](https://agentmods.dev/skills/benchflow-ai/skillsbench/glm-calibration)
Your own site
<a href="https://agentmods.dev/skills/benchflow-ai/skillsbench/glm-calibration"><img src="https://agentmods.dev/badge/skills/benchflow-ai/skillsbench/glm-calibration/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 glm-calibration

Your own site · 80×15
<a href="https://agentmods.dev/skills/benchflow-ai/skillsbench/glm-calibration"><img src="https://agentmods.dev/badge/skills/benchflow-ai/skillsbench/glm-calibration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 839 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00032 $0.00839
Opus 5 $0.00016 $0.00419
Sonnet 5 $0.00006 $0.00168
Haiku 4.5 $0.00003 $0.00084

Measured 8d ago against content hash a1342ccb6297, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

glm-calibration scanned grade A 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 8d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

subprocess.run(['glm'], capture_output=True)
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

tasks/glm-lake-mendota/environment/skills/glm-calibration/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GLM Calibration Guide

Overview

GLM calibration involves adjusting physical parameters to minimize the difference between simulated and observed water temperatures. The goal is typically to achieve RMSE < 2.0°C.

Key Calibration Parameters

Parameter Section Description Default Range
Kw &light Light extinction coefficient (m⁻¹) 0.3 0.1 - 0.5
coef_mix_hyp &mixing Hypolimnetic mixing coefficient 0.5 0.3 - 0.7
wind_factor &meteorology Wind speed scaling factor 1.0 0.7 - 1.3
lw_factor &meteorology Longwave radiation scaling 1.0 0.7 - 1.3
ch &meteorology Sensible heat transfer coefficient 0.0013 0.0005 - 0.002

Parameter Effects

Parameter Increase Effect Decrease Effect
Kw Less light penetration, cooler deep water More light penetration, warmer deep water
coef_mix_hyp More deep mixing, weaker stratification Less mixing, stronger stratification
wind_factor More surface mixing Less surface mixing
lw_factor More heat input Less heat input
ch More sensible heat exchange Less heat exchange

Calibration with Optimization

from scipy.optimize import minimize

def objective(x):
    Kw, coef_mix_hyp, wind_factor, lw_factor, ch = x

    # Modify parameters
    params = {
        'Kw': round(Kw, 4),
        'coef_mix_hyp': round(coef_mix_hyp, 4),
        'wind_factor': round(wind_factor, 4),
        'lw_factor': round(lw_factor, 4),
        'ch': round(ch, 6)
    }
    modify_nml('glm3.nml', params)

    # Run GLM
    subprocess.run(['glm'], capture_output=True)

    # Calculate RMSE
    rmse = calculate_rmse(sim_df, obs_df)
    return rmse

# Initial values (defaults)
x0 = [0.3, 0.5, 1.0, 1.0, 0.0013]

# Run optimization
result = minimize(
    objective,
    x0,
    method='Nelder-Mead',
    options={'maxiter': 150}
)

Read the full file on GitHub · 93 lines

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. 8d ago First seen · 93 lines · 32 tokens per session scan A a1342ccb6297

Subscribe to this mod's changes

glm-calibration is a skill published in the GitHub repository benchflow-ai/skillsbench (1,764 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 32 tokens to every session and 839 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.