Agent skill

Brainstorming

by xpinjection in xpinjection/test-driven-spring-boot

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior.

MITAuto-check passedAgent Workflows

Install Brainstorming

skills CLI
$ npx skills add xpinjection/test-driven-spring-boot --skill brainstorming -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install xpinjection/test-driven-spring-boot brainstorming --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/xpinjection/test-driven-spring-boot.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/brainstorming .claude/skills/brainstorming && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
brainstorming
GitHub stars
112
Used in
54 other repos
Token cost
~2.6k tokens
SKILL.md length
1,326 words
Files
8 (incl. scripts)
Skills in repo
2
Repo updated
First seen
Licence
MIT

At a glance

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior.

  • Works in 9 steps: Explore project context — check files,… → Offer the visual companion just-in-time… → Ask clarifying questions — one at a… → …
  • Tasks that involve Brainstorming
  • SKILL.md covers Anti-Pattern: "This Is Too…, Checklist, Process Flow and The Process, plus 3 more sections
  • Runs JavaScript and Shell scripts from its folder

What it does

Brainstorming is an agent skill from xpinjection/test-driven-spring-boot. You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

Its SKILL.md is about 2.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including scripts (for example `scripts/helper.js`, `scripts/start-server.sh` and `scripts/stop-server.sh`).

It sits in Agent Workflows, covering Brainstorming, Backend development and Test-driven development. It works with Spring Boot and Java. The repository describes itself as: Sample project for "Test-driven Spring Boot applications" training. The licence is MIT.

When your agent uses it

  • Tasks that involve Brainstorming
  • Tasks that involve Backend development
  • Tasks that involve Test-driven development

Example prompts

  • “/brainstorming”

Requirements

  • Node.js
  • A Bash shell

Workflow steps

9 steps, taken from the first numbered list in SKILL.md.

  1. Explore project context — check files, docs, recent commits
  2. Offer the visual companion just-in-time — NOT upfront. The first time a question would genuinely be clearer shown than described, offer it…
  3. Ask clarifying questions — one at a time, understand purpose/constraints/success criteria
  4. Propose 2-3 approaches — with trade-offs and your recommendation
  5. Present design — in sections scaled to their complexity, get user approval after each section
  6. Write design doc — save to docs/superpowers/specs/YYYY-MM-DD--design.md and commit
  7. Spec self-review — quick inline check for placeholders, contradictions, ambiguity, scope (see below)
  8. User reviews written spec — ask user to review the spec file before proceeding
  9. Transition to implementation — invoke writing-plans skill to create implementation plan

What it can do on your machine

Read from SKILL.md and the folder at commit 9c68aa7. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 5 files in scripts/ (JavaScript and Shell), which the agent can run.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Brainstorming loads about 2.6k tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 1,326 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~53
When it runs · the whole SKILL.md, loaded when a task matches
~2.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from xpinjection/test-driven-spring-boot at commit 9c68aa7, republished under its MIT licence (© xpinjection). 1,326 words, ~2,599 tokens.

Download SKILL.mdSave it as .claude/skills/brainstorming/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.
name
brainstorming
description
You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

Brainstorming Ideas Into Designs

Help turn ideas into fully formed designs and specs through natural collaborative dialogue.

Start by understanding the current project context, then ask questions one at a time to refine the idea. Once you understand what you're building, present the design and get user approval.

<HARD-GATE>
Do NOT invoke any implementation skill, write any code, scaffold any project, or take any implementation action until you have presented a design and the user has approved it. This applies to EVERY project regardless of perceived simplicity.
</HARD-GATE>

Anti-Pattern: "This Is Too Simple To Need A Design"

Every project goes through this process. A todo list, a single-function utility, a config change — all of them. "Simple" projects are where unexamined assumptions cause the most wasted work. The design can be short (a few sentences for truly simple projects), but you MUST present it and get approval.

Checklist

You MUST create a task for each of these items and complete them in order:

  1. Explore project context — check files, docs, recent commits
  2. Offer the visual companion just-in-time — NOT upfront. The first time a question would genuinely be clearer shown than described, offer it then (its own message); on approval its browser tab opens for you. If no visual question ever arises, never offer it. See the Visual Companion section below.
  3. Ask clarifying questions — one at a time, understand purpose/constraints/success criteria
  4. Propose 2-3 approaches — with trade-offs and your recommendation
  5. Present design — in sections scaled to their complexity, get user approval after each section
  6. Write design doc — save to docs/superpowers/specs/YYYY-MM-DD-<topic>-design.md and commit
  7. Spec self-review — quick inline check for placeholders, contradictions, ambiguity, scope (see below)
  8. User reviews written spec — ask user to review the spec file before proceeding
  9. Transition to implementation — invoke writing-plans skill to create implementation plan

Process Flow

dot
digraph brainstorming {
    "Explore project context" [shape=box];
    "Ask clarifying questions" [shape=box];
    "Propose 2-3 approaches" [shape=box];
    "Present design sections" [shape=box];
    "User approves design?" [shape=diamond];
    "Write design doc" [shape=box];
    "Spec self-review\n(fix inline)" [shape=box];
    "User reviews spec?" [shape=diamond];
    "Invoke writing-plans skill" [shape=doublecircle];

    "Explore project context" -> "Ask clarifying questions";
    "Ask clarifying questions" -> "Propose 2-3 approaches";
    "Propose 2-3 approaches" -> "Present design sections";
    "Present design sections" -> "User approves design?";
    "User approves design?" -> "Present design sections" [label="no, revise"];
    "User approves design?" -> "Write design doc" [label="yes"];
    "Write design doc" -> "Spec self-review\n(fix inline)";
    "Spec self-review\n(fix inline)" -> "User reviews spec?";
    "User reviews spec?" -> "Write design doc" [label="changes requested"];
    "User reviews spec?" -> "Invoke writing-plans skill" [label="approved"];
}

The terminal state is invoking writing-plans. Do NOT invoke frontend-design, mcp-builder, or any other implementation skill. The ONLY skill you invoke after brainstorming is writing-plans.

The Process

Understanding the idea:

  • Check out the current project state first (files, docs, recent commits)
  • Before asking detailed questions, assess scope: if the request describes multiple independent subsystems (e.g., "build a platform with chat, file storage, billing, and analytics"), flag this immediately. Don't spend questions refining details of a project that needs to be decomposed first.
  • If the project is too large for a single spec, help the user decompose into sub-projects: what are the independent pieces, how do they relate, what order should they be built? Then brainstorm the first sub-project through the normal design flow. Each sub-project gets its own spec → plan → implementation cycle.
  • For appropriately-scoped projects, ask questions one at a time to refine the idea
  • Prefer multiple choice questions when possible, but open-ended is fine too
  • Only one question per message - if a topic needs more exploration, break it into multiple questions
  • Focus on understanding: purpose, constraints, success criteria

Exploring approaches:

  • Propose 2-3 different approaches with trade-offs
  • Present options conversationally with your recommendation and reasoning
  • Lead with your recommended option and explain why

Presenting the design:

  • Once you believe you understand what you're building, present the design
  • Scale each section to its complexity: a few sentences if straightforward, up to 200-300 words if nuanced
  • Ask after each section whether it looks right so far
  • Cover: architecture, components, data flow, error handling, testing
  • Be ready to go back and clarify if something doesn't make sense

Design for isolation and clarity:

  • Break the system into smaller units that each have one clear purpose, communicate through well-defined interfaces, and can be understood and tested independently
  • For each unit, you should be able to answer: what does it do, how do you use it, and what does it depend on?
  • Can someone understand what a unit does without reading its internals? Can you change the internals without breaking consumers? If not, the boundaries need work.
  • Smaller, well-bounded units are also easier for you to work with - you reason better about code you can hold in context at once, and your edits are more reliable when files are focused. When a file grows large, that's often a signal that it's doing too much.

Working in existing codebases:

  • Explore the current structure before proposing changes. Follow existing patterns.
  • Where existing code has problems that affect the work (e.g., a file that's grown too large, unclear boundaries, tangled responsibilities), include targeted improvements as part of the design - the way a good developer improves code they're working in.
  • Don't propose unrelated refactoring. Stay focused on what serves the current goal.
Show full SKILL.md (570 more words)Show less

After the Design

Documentation:

  • Write the validated design (spec) to docs/superpowers/specs/YYYY-MM-DD-<topic>-design.md
    • (User preferences for spec location override this default)
  • Use elements-of-style:writing-clearly-and-concisely skill if available
  • Commit the design document to git

Spec Self-Review: After writing the spec document, look at it with fresh eyes:

  1. Placeholder scan: Any "TBD", "TODO", incomplete sections, or vague requirements? Fix them.
  2. Internal consistency: Do any sections contradict each other? Does the architecture match the feature descriptions?
  3. Scope check: Is this focused enough for a single implementation plan, or does it need decomposition?
  4. Ambiguity check: Could any requirement be interpreted two different ways? If so, pick one and make it explicit.

Fix any issues inline. No need to re-review — just fix and move on.

User Review Gate: After the spec review loop passes, ask the user to review the written spec before proceeding:

"Spec written and committed to <path>. Please review it and let me know if you want to make any changes before we start writing out the implementation plan."

Wait for the user's response. If they request changes, make them and re-run the spec review loop. Only proceed once the user approves.

Implementation:

  • Invoke the writing-plans skill to create a detailed implementation plan
  • Do NOT invoke any other skill. writing-plans is the next step.

Key Principles

  • One question at a time - Don't overwhelm with multiple questions
  • Multiple choice preferred - Easier to answer than open-ended when possible
  • YAGNI ruthlessly - Remove unnecessary features from all designs
  • Explore alternatives - Always propose 2-3 approaches before settling
  • Incremental validation - Present design, get approval before moving on
  • Be flexible - Go back and clarify when something doesn't make sense

Visual Companion

A browser-based companion for showing mockups, diagrams, and visual options during brainstorming. Available as a tool — not a mode. Accepting the companion means it's available for questions that benefit from visual treatment; it does NOT mean every question goes through the browser.

Offering the companion (just-in-time): Do NOT offer it upfront. Wait until a question would genuinely be clearer shown than told — a real mockup / layout / diagram question, not merely a UI topic. The first time that happens, offer it then, as its own message:

"This next part might be easier if I show you — I can put together mockups, diagrams, and comparisons in a browser tab as we go. It's still new and can be token-intensive. Want me to? I'll open it for you."

This offer MUST be its own message. Only the offer — no clarifying question, summary, or other content. Wait for the user's response. If they accept, start the server with --open so their browser opens to the first screen automatically. If they decline, continue text-only and don't offer again unless they raise it.

Per-question decision: Even after the user accepts, decide FOR EACH QUESTION whether to use the browser or the terminal. The test: would the user understand this better by seeing it than reading it?

  • Use the browser for content that IS visual — mockups, wireframes, layout comparisons, architecture diagrams, side-by-side visual designs
  • Use the terminal for content that is text — requirements questions, conceptual choices, tradeoff lists, A/B/C/D text options, scope decisions

A question about a UI topic is not automatically a visual question. "What does personality mean in this context?" is a conceptual question — use the terminal. "Which wizard layout works better?" is a visual question — use the browser.

If they agree to the companion, read the detailed guide before proceeding: skills/brainstorming/visual-companion.md

© xpinjection, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 7 other files (scripts) in .claude/skills/brainstorming of xpinjection/test-driven-spring-boot.

  • SKILL.md
  • scripts/frame-template.html
  • scripts/helper.js
  • scripts/server.cjs
  • scripts/start-server.sh
  • scripts/stop-server.sh
  • spec-document-reviewer-prompt.md
  • visual-companion.md

Open the folder on GitHubat commit 9c68aa7

Used in at least 37 other repositories

We found 73 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 54 other GitHub owners. This page covers the copy in xpinjection/test-driven-spring-boot, which our catalogue first saw on October 7, 2026.

…and 23 more copies not listed here.

Compare with similar skills

Brainstorming next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Brainstorming compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Brainstorming this skillxpinjection/test-driven-spring-boot11254 repos~2.6kAutomated safety check: PassMIT
Java MCP Server Generatorgithub/awesome-copilot40k1 repos~5.5kAutomated safety check: PassMIT
Java Coding StandardsSnailclimb/AIGuide667—~1kAutomated safety check: PassNone
MCP Serverrrezartprebreza/spring-boot-skills2961 repos~1.1kAutomated safety check: PassMIT
MCP Serverrrezartprebreza/spring-boot-skills2961 repos~1.3kAutomated safety check: PassMIT
Spring Bootpiomin/claude-ai-spring-boot1.3k—~2kAutomated safety check: PassApache-2.0

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Works with

Questions about Brainstorming

What does Brainstorming do?

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Brainstorming is an agent skill from xpinjection/test-driven-spring-boot. You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior.

When should I use Brainstorming?

Brainstorming fits situations like: tasks that involve Brainstorming; tasks that involve Backend development; tasks that involve Test-driven development.

How do I install Brainstorming in Claude Code?

Run `npx skills add xpinjection/test-driven-spring-boot --skill brainstorming -a claude-code`. Or copy the skill folder (.claude/skills/brainstorming in xpinjection/test-driven-spring-boot) into .claude/skills/brainstorming in your project. Claude Code loads it when a task matches its description.

How do I install Brainstorming in Codex?

Run `npx skills add xpinjection/test-driven-spring-boot --skill brainstorming -a codex`. Or copy the skill folder (.claude/skills/brainstorming in xpinjection/test-driven-spring-boot) into .agents/skills/brainstorming in your project. Codex loads it when a task matches its description.

Can I use Brainstorming in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add xpinjection/test-driven-spring-boot --skill brainstorming -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/brainstorming, .gemini/skills/brainstorming, .github/skills/brainstorming and .opencode/skills/brainstorming in your project.

What does Brainstorming need to run?

Going by SKILL.md and its folder, Brainstorming needs JavaScript and a shell for the scripts in its folder. Our summary lists: Node.js; A Bash shell.

Does Brainstorming access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Brainstorming safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Brainstorming use?

Brainstorming is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Brainstorming use?

About 2.6k tokens (SKILL.md is roughly 10k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Brainstorming?

Skills that share tags, products or a category with Brainstorming: Java MCP Server Generator (github/awesome-copilot, 40k stars), Java Coding Standards (Snailclimb/AIGuide, 667 stars), MCP Server (rrezartprebreza/spring-boot-skills, 296 stars) and MCP Server (rrezartprebreza/spring-boot-skills, 296 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Brainstorming?

xpinjection (a GitHub user) maintains it in xpinjection/test-driven-spring-boot, which has 112 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on August 12, 2026.

Source: xpinjection/test-driven-spring-boot on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.