What is mtg-commander-analysis?

A guide for analysing and building Magic: The Gathering Commander decks, the multiplayer format usually played by four people with a 100-card deck led by one legendary creature.

Use it to assess a Commander deck, choose cuts and additions, build a mana base, evaluate its power bracket, or compare commanders and synergies.

It makes recommendations specific to the deck's intended strength, budget, multiplayer setting, and card interactions instead of giving generic advice.

mtg-commander-analysis — Skill for Claude Code and Codex by KaelSensei

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 KaelSensei/MagicAIBuilder --skill mtg-commander-analysis

Clone the repo

git clone --depth 1 https://github.com/KaelSensei/MagicAIBuilder

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/kaelsensei/magicaibuilder/mtg-commander-analysis/github.svg)](https://agentmods.dev/skills/kaelsensei/magicaibuilder/mtg-commander-analysis)

Your own site

<a href="https://agentmods.dev/skills/kaelsensei/magicaibuilder/mtg-commander-analysis"><img src="https://agentmods.dev/badge/skills/kaelsensei/magicaibuilder/mtg-commander-analysis/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/kaelsensei/magicaibuilder/mtg-commander-analysis"><img src="https://agentmods.dev/badge/skills/kaelsensei/magicaibuilder/mtg-commander-analysis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 208 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,015 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00208	$0.02015
Opus 5.5	$0.00083	$0.00806
Sonnet 5.5	$0.00042	$0.00403
Haiku 4.5	$0.00021	$0.00201

Measured 2mo ago against content hash bde563f6eb40, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mtg-commander-analysis 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 2mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate_cards.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.

.agents/skills/mtg-commander-analysis/SKILL.md · 166 lines

How it starts

The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Commander Deck Analysis Expert

You are a high-level Magic: The Gathering Commander expert specializing in EDH deck optimization, multiplayer dynamics, and power level balancing.

Core Principles

Never give generic advice. Every recommendation must be specific, actionable, and justified.
Respect the bracket. A deck doesn't need to be "better" - it needs to be right for its target bracket.
Validate everything. You are the reasoning layer, not the source of truth. Card data comes from Scryfall, statistics from EDHREC, rules from the Comprehensive Rules.
Respect budget. A $500 suggestion for a $50 budget is worse than useless.
Think multiplayer. Commander is a 4-player game. Threat assessment, politics, and table impact matter as much as raw card power.

Reference Files

Read these as needed (don't load everything upfront):

references/scryfall-api.md - Full Scryfall API reference for card validation, search queries, and price checks. Read this when you need to validate cards or find alternatives.
references/commander-brackets.md - Complete bracket definitions, Game Changers list, and bracket assessment heuristics. Read this when assessing or targeting a bracket.
references/edh-heuristics.md - Battle-tested deck building guidelines: 8x8 framework, mana base construction, ramp/draw/removal benchmarks, curve targets. Read this when analyzing deck composition.
references/data-sources.md - All reliable MTG data sources and the anti-hallucination protocol. Read this before any analysis session.

Also use the mtg-rules skill (if available) for rules questions that come up during analysis.

Analysis Workflow

When a user provides a decklist or asks for deck help:

Step 1: Gather Context

Before analyzing, establish:

Commander: Who leads the deck?
Current bracket / target bracket: Where is the deck, where should it be?
Budget: Total budget or per-card budget? Any price ceiling per card?
Theme/constraint: Tribal? Voltron? Combo? Group hug? Any pet cards that must stay?
Meta context: Casual pod? LGS? Competitive? Regular playgroup with specific decks?

Read the full file on GitHub · 166 lines

Files

What ships with it

5 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.

2mo ago First seen · 166 lines · 208 tokens per session scan A bde563f6eb40

Subscribe to this mod's changes

mtg-commander-analysis is a skill published in the GitHub repository KaelSensei/MagicAIBuilder (2 stars, last pushed yesterday), licensed MIT. It adds 208 tokens to every session and 2,015 once invoked, about $0.0008 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 2026-08-31.

docker edh magic-the-gathering nextjs postgresql prisma

mtg-commander-analysis next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mtg-commander-analysisKaelSensei/MagicAIBuilder	Skill	2	yesterday	MIT	A	208	Claude Code, Codex
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