A guided conversation for turning a vague creative idea into a clear proposal. It asks one question at a time and checks what you want, who it is for, how success will be measured, and what limits apply.

Use it to shape a new feature or project, refine an idea, or stress-test your thinking. It is not intended for clear, small requests or simple information questions.

It helps uncover missing details before planning or coding begins, when changing direction is cheaper. It avoids silently guessing requirements.

brainstorm — Skill for Claude Code and Codex by int2t05

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 int2t05/engineering-skills --skill brainstorm

Clone the repo

git clone --depth 1 https://github.com/int2t05/engineering-skills

Made for: Claude Code, Codex.

Or install engineering-skills, the plugin that ships this one along with the rest of its 47 skills, 1 hook.

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/int2t05/engineering-skills/brainstorm/github.svg)](https://agentmods.dev/skills/int2t05/engineering-skills/brainstorm)

Your own site

<a href="https://agentmods.dev/skills/int2t05/engineering-skills/brainstorm"><img src="https://agentmods.dev/badge/skills/int2t05/engineering-skills/brainstorm/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/int2t05/engineering-skills/brainstorm"><img src="https://agentmods.dev/badge/skills/int2t05/engineering-skills/brainstorm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 404 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	$0.00025	$0.00404
Opus 5.5	$0.00010	$0.00162
Sonnet 5.5	$0.00005	$0.00081
Haiku 4.5	$0.00003	$0.00040

Measured 15d ago against content hash 24a3ae66f6ea, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

brainstorm 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 15d 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.

skills/01-product/brainstorm/SKILL.md · 38 lines

What it actually says

Brainstorm

When to use

Clarify a product idea through focused dialogue.

Not for: spec for confirmed requirements; research for external investigation.

Steps

Identify the user, real problem, workaround and desired outcome; avoid invented confidence percentages.
Ask questions whose answers change scope or direction. Respect clear delegation and previous confirmations rather than requiring ritual wording.
Compare meaningful directions by value, feasibility and constraints; distinguish interview evidence from hypotheses.
Present scope, observable success and open decisions for confirmation before dependent specification.

Output: Suggested paths, subject to human audit: ROADMAP.md; docs/research/interview.md only for actual interviews.

Verify

A concrete user problem and outcome are defined; assumptions and user confirmations are distinguishable.

References

engineering-principles.md — shared decision boundaries, scope and verification.
product-principles.md — product discipline (need≠feature, behavior is data, validate before building, say no to good ideas, discovery precedes delivery).
human-audit.md — document consent, readability and human review.
references/techniques.md — ideation frameworks (SCAMPER, HMW, first principles, JTBD), decision techniques (design tree, questionnaire handoff), evaluation rubric, and worked examples.
references/discovery-methods.md — problem-validation methods (Mom Test interview, JTBD switching interview, opportunity-solution tree, working backwards / PR-FAQ, Lean Canvas, MVP validation loop).

Files

What ships with it

3 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.

15d ago Changed · -74 lines · -50 tokens per session 24a3ae66f6ea
21d ago Changed · +4 lines d9ac93edcaa9
2mo ago First seen · 108 lines · 75 tokens per session scan A 0a2ae1f35f62

Subscribe to this mod's changes

brainstorm is a skill published in the GitHub repository int2t05/engineering-skills (3 stars, last pushed 15d ago), licensed MIT. It adds 25 tokens to every session and 404 once invoked, about $0.0001 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.

Claude Code Code review Planning TDD agent-skills claude-code-plugin sdlc

design-reviewer

Use after AC and before RED for any wave that ships UI or changes existing behaviour. Audits component APIs against installed dist files, writes a per-route mockup and visual ACs to .wave/dr.md.

Harshvardhan86/claude-wave-plugin · 46 tokens

test-audit

Audit test suites for T1-T4 violations using AST analysis, mock detection, and multi-stage synthesis. Invoke when user asks to audit tests, check test quality, find mock violations, review test effectiveness, or inspect test suites for over-mocking. Triggers automatic rewrites when quality gates fail.

QBall-Inc/the-bulwark · 0 tokens

plan

Analyzes architecture, selects patterns, assesses testability, then decomposes work into ordered TDD tasks with exact verification commands and explicit acceptance mapping. Works from an approved spec (zuvo:brainstorm output) or directly from a user-provided description.

greglas75/zuvo · 53 tokens

brainstorm