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brainstorm-mythos

brainstorm-mythos is a skill for Claude Code from radumarias/xorio-claude-plugin. It costs 119 tokens per session (1,498 once invoked), scanned A, original, MIT.

A structured brainstorming workflow that generates ideas from several viewpoints, challenges them, discusses the strongest ones, and produces a ranked report.

In plain words
What is it for?
Use it to improve a specific thing or develop several possible ideas. It is available only when the user explicitly requests this kind of brainstorm.
Why use it?
It reduces the effort of collecting many ideas and checking them for weaknesses before choosing which ones to pursue.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions Codex.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the xorio plugin — 9 skills, 11 commands, 4 agents, 2 hooks shipped together

not rated 3repo 6d ago A scan 119 tokens original MIT

Good fit Use it to improve a specific thing or develop several possible ideas. It is available only when the user explicitly requests this kind of brainstorm.

Compare 6 skills from other repositories ↓
View source ↗ radumarias/xorio-claude-plugin
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add radumarias/xorio-claude-plugin
Claude Code
/plugin install xorio

Made for: Claude Code.

Or install xorio, the plugin that ships this one along with the rest of its 9 skills, 11 commands, 4 agents, 2 hooks.

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 brainstorm-mythos

README.md
[![agentmods](https://agentmods.dev/badge/skills/radumarias/xorio-claude-plugin/brainstorm-mythos/github.svg)](https://agentmods.dev/skills/radumarias/xorio-claude-plugin/brainstorm-mythos)
Your own site
<a href="https://agentmods.dev/skills/radumarias/xorio-claude-plugin/brainstorm-mythos"><img src="https://agentmods.dev/badge/skills/radumarias/xorio-claude-plugin/brainstorm-mythos/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 brainstorm-mythos

Your own site · 80×15
<a href="https://agentmods.dev/skills/radumarias/xorio-claude-plugin/brainstorm-mythos"><img src="https://agentmods.dev/badge/skills/radumarias/xorio-claude-plugin/brainstorm-mythos.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 119 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,498 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00119 $0.01498
Opus 5.5 $0.00048 $0.00599
Sonnet 5.5 $0.00024 $0.00300
Haiku 4.5 $0.00012 $0.00150

Measured 1mo ago against content hash 6fb4f100db23, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

brainstorm-mythos 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 1mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (workflow.js), 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.

skills/brainstorm-mythos/SKILL.md · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

brainstorm-mythos

Run a structured multi-agent brainstorm on a topic: a Map → Ideate → Refute → Debate → Synthesize Workflow that emits many ideas across diverse lenses, adversarially vets each (default-refuted majority vote), debates the survivors, and returns a ranked, vetted report. Built for two jobs: optimizing something specific, and getting several ideas to build a few of them out.

The orchestration lives in workflow.js (next to this file). This skill's job is to parse the request, ground it lightly, launch the workflow, and present results.

Model policy — Fable for EVERY agent, max thinking, no exceptions

This skill uses exactly ONE model for every agent it spawns: Fable (the fable option of the Workflow tool's model param). There is no model tiering, no model mixing, and no cross-family panel — do not use Sonnet, Opus, Haiku, Codex, or any other model for any mapper, ideator, validator, debater, or synthesizer.

  • workflow.js passes model: 'fable' explicitly on every agent() call — never inherited, never substituted.
  • Thinking explicitly at MAX on every agent: every agent prompt begins with the keyword ultrathink on its own line; ultrathink IS the maximum thinking level. This applies to ALL agents — Map, every Ideate lens, every Refute validator, every Debate role, and Synthesize. No agent may run at a lower thinking level.
  • If the fable model option is ever unavailable in the runtime, stop and report it — do not silently substitute another model.

Usage

/brainstorm-mythos <topic / question>  [flags]

Flags:

  • --target <path|glob|diff> — code/files/diff to ground on. The Map agent reads it.
  • --rounds N — Ideate→Refute waves before synthesis (default 2). This is the depth knob.
  • --lenses generic|optimization — idea-generation lens set (default generic).
  • --out <file> — report path (default BRAINSTORM-<slug>-<date>.md in the cwd).
  • A +Nk budget directive (e.g. +400k) → the workflow runs extra Ideate→Refute waves until ~spent.

Read the full file on GitHub · 101 lines

Files

What ships with it

1 file 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. 1mo ago First seen · 101 lines · 119 tokens per session scan A 6fb4f100db23

Subscribe to this mod's changes

brainstorm-mythos is a skill published in the GitHub repository radumarias/xorio-claude-plugin (3 stars, last pushed 6d ago), licensed MIT. It adds 119 tokens to every session and 1,498 once invoked, about $0.0005 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.

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