math-model-selector

math-model-selector is a skill for Claude Code from parcadei/Continuous-Claude-v3. It costs 14 tokens per session (762 once invoked), scanned A, original, MIT.

A guide that helps choose the right branch of mathematics for a problem, such as statistics, optimization, probability, or differential equations.

In plain words
What is it for?
Use it to classify a problem, ask the right questions about change and uncertainty, and select a suitable mathematical framework.
Why use it?
It removes the guesswork of deciding how to describe a problem mathematically before solving it.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to classify a problem, ask the right questions about change and uncertainty, and select a suitable mathematical framework.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/parcadei/continuous-claude-v3/math-model-selector
About the project

Continuous-Claude-v3 is a Claude Code development environment that preserves working context between sessions, coordinates specialized agents, and stores project knowledge through ledgers, handoffs, and analysis tools. It is for people using Claude Code on ongoing or complex software work. Its catalogue entries are the skills, agents, hooks, plugin, and setting that provide its workflows and orchestration.

parcadei/Continuous-Claude-v3 · 3,938 stars · on GitHub

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 parcadei/Continuous-Claude-v3 --skill math-model-selector
Clone the repo
git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3

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 math-model-selector

README.md
[![agentmods](https://agentmods.dev/badge/skills/parcadei/continuous-claude-v3/math-model-selector/github.svg)](https://agentmods.dev/skills/parcadei/continuous-claude-v3/math-model-selector)
Your own site
<a href="https://agentmods.dev/skills/parcadei/continuous-claude-v3/math-model-selector"><img src="https://agentmods.dev/badge/skills/parcadei/continuous-claude-v3/math-model-selector/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 math-model-selector

Your own site · 80×15
<a href="https://agentmods.dev/skills/parcadei/continuous-claude-v3/math-model-selector"><img src="https://agentmods.dev/badge/skills/parcadei/continuous-claude-v3/math-model-selector.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 14 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 762 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 $0.00014 $0.00762
Opus 5 $0.00007 $0.00381
Sonnet 5 $0.00003 $0.00152
Haiku 4.5 $0.00001 $0.00076

Measured 9d ago against content hash e5e2ef153ff3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

math-model-selector 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 9d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/skills/math/math-model-selector/SKILL.md · 126 lines

How it starts

The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Math Model Selector

When to Use

Trigger on phrases like:

  • "what math should I use"
  • "which mathematical framework"
  • "how do I model this"
  • "what kind of problem is this"
  • "formalize this problem"

Use when user has a problem but doesn't know which mathematical domain applies.

Process

Guide user through decision tree using Polya-style questions:

1. Identify the quantity

Ask: "What quantity or phenomenon are you trying to understand?"

  • Physics problem -> conservation laws, differential equations
  • Economics -> equilibrium, optimization
  • Data patterns -> statistics, regression

2. Characterize change

Ask: "What changes, and how does it change?"

  • Discrete steps -> difference equations, recurrences
  • Continuous rate -> ODEs
  • Rate of rate matters -> 2nd order ODEs
  • Spatial variation -> PDEs

3. Check for uncertainty

Ask: "Is there randomness or uncertainty involved?"

  • Deterministic -> standard analysis
  • Epistemic uncertainty -> Bayesian methods
  • Random process -> probability theory, stochastic processes

4. Optimization check

Ask: "Are you optimizing something?"

  • Convex objective -> linear/quadratic programming
  • Non-convex -> gradient descent, evolutionary methods
  • Discrete choices -> combinatorics, integer programming

5. Answer precision

Ask: "What level of answer do you need?"

  • Rough estimate -> dimensional analysis
  • Qualitative behavior -> phase portraits, stability
  • Numerical answer -> simulation
  • Exact closed form -> analytical methods

Key Questions to Ask

  1. What changes? (discrete vs continuous)
  2. What causes the change? (rate dependencies)
  3. What's random? (uncertainty type)
  4. What's being optimized? (objective function)
  5. How precise? (qualitative vs quantitative)

Output Format

Framework Recommendation:
- Primary: [framework name]
- Why: [one-sentence justification]

Starting Point:
- Key equations: [relevant formulas]
- Initial approach: [first step]

Tools to Use:
- [specific script or computation tool]

Related Skills:
- [domain skill to activate next]

Read the full file on GitHub · 126 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. 9d ago First seen · 126 lines · 14 tokens per session scan A e5e2ef153ff3

Subscribe to this mod's changes

math-model-selector is a skill published in the GitHub repository parcadei/Continuous-Claude-v3 (3,938 stars, last pushed 7mo ago), licensed MIT. It adds 14 tokens to every session and 762 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 2026-09-03.

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