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Brainstorming

OpenAIOfficialCreated by Jesse VincentDistributed by OpenAI

  • Skill
  • Role or persona
  • Agent tooling
  • MIT
  • Low risk
  • Has scripts

From the author

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.
— the description by Jesse Vincent

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

Brainstorming is a mandatory procedural skill designed to align the agent and user on intent, requirements, and design before any implementation occurs. It enforces a strict approval gate across three distinct paths: Spike (feasibility), Bounded (small, existing-code changes), and Architectural (new projects or major structural changes). By requiring explicit classification and user sign-off, it prevents unexamined assumptions and ensures that all development work is intentional and well-scoped.

What it does

  • Classifies requests into Spike, Bounded, or Architectural paths.
  • Enforces a hard gate requiring user approval before any code or implementation begins.
  • Guides the user through iterative design and requirement refinement.
  • Provides a structured approach for decomposing large projects into manageable sub-projects.
  • Facilitates the creation of formal design specifications for complex architectural tasks.
  • Offers a visual companion tool for diagrams and mockups when visual clarity is required.

When to use it

  • Before starting any new feature, component, or functionality.
  • When modifying existing code behavior.
  • When you need to verify the feasibility of an idea (Spike).
  • When planning a new project or a major architectural change.
  • Whenever you are unsure of the scope or requirements of a task.

Advantages

  • Eliminates wasted effort by catching misunderstandings early.
  • Ensures all work is aligned with user expectations through mandatory approval gates.
  • Provides a clear, repeatable process for handling tasks of varying complexity.
  • Promotes modular design by encouraging the decomposition of large systems.
  • Prevents 'hidden complexity' by requiring path re-classification if a task grows.

Usage examples

“I want to add a dark mode toggle to the settings page.”
The agent classifies this as a Bounded task, asks clarifying questions about the current settings implementation, presents a short design in chat, and waits for your explicit approval before modifying any files.
“Can we build a new microservice for handling user notifications?”
The agent classifies this as an Architectural task, explores the project context, proposes multiple approaches with trade-offs, and guides you through creating a formal design specification before invoking the planning skill.

Install

  1. Download the skill as a ZIP:

    https://autogineer.com/agent-skills/openai/brainstorming/download
  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip brainstorming.zip -d .agents/skills

Documentation by Jesse Vincent

Brainstorming Ideas Into Designs

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

Start by classifying how much process the request needs, then work through your path: understand the context, refine the idea, present a design, and get your human partner's approval.

<HARD-GATE> Do NOT invoke any implementation skill, write any code, scaffold any project, or take any implementation action until you have told your human partner what you intend and they have approved it. This applies to EVERY task on EVERY path below — the ceremony scales with the task; the approval gate never does. </HARD-GATE>

Three Paths

Before your first question, classify the request and say the classification out loud — "this looks bounded, so I'll present a short design here rather than write a spec" — so your human partner can override it:

  • Spike — a feasibility question ("can we...", "is it possible...", "quick and dirty is fine") whose output is an answer, not code you keep. Present the question and what you'll try in 2-3 sentences, get a nod, then find out as cheaply as correctness allows. No design doc, no spec file. Report findings as a recommendation; anything you built stays labeled throwaway.

  • Bounded — a well-scoped change to code that already exists in this repo: a new flag, a small endpoint, a one-file fix. Understanding the kind of app is not enough — bounded means the flow you are changing is already here to read. If there is no existing flow to change, the task is not bounded. Ask the clarifying questions that matter, present a short design IN CHAT (a few sentences to a few short paragraphs), and STOP. Implementation starts only after your human partner says yes to that design — a bounded task's approval is as hard a gate as an architectural one. No spec file, no implementation plan document.

  • Architectural — new projects, new subsystems, changes that restructure how components fit together or alter interfaces others depend on. Follow the full process: questions, approaches, sectioned design, written spec, then the writing-plans skill.

When in doubt between two paths, take the heavier one. The ratchet is one-way: hidden complexity discovered mid-task upgrades the path — stop, say so, and step up. Nothing downgrades mid-task.

Anti-Pattern: "Too Simple To Need Approval"

Every path ends with your human partner approving your intent before implementation. A todo list, a single-function utility, a config change — the design may be two sentences in chat, but you MUST present it and get approval. "Simple" tasks are where unexamined assumptions cause the most wasted work. What scales with simplicity is the artifact, never the approval.

Red Flags

ThoughtReality
"This is too simple to need a design"Simple means a short design, not no design. Two sentences in chat, then approval.
"I'll call it bounded and skip the spec"Reaching for a label to skip work IS the doubt — take the heavier path.
"It's bounded and the design is obvious — I'll start while they read it"The gate is the approval, not the design's length. Present, then stop until you hear yes.
"I understand this kind of app, so it's bounded"Bounded measures the repo, not your familiarity. A new project has no existing flow — it is architectural.
"The spike works, so I'll keep the code"A spike's output is an answer. Keeping the code is a new request — classify it.
"It grew, but I'm almost done — no need to re-classify"Hidden complexity upgrades the path mid-task. Stop and say so.
"They approved the spike, so the follow-up change is approved too"Each task gets its own classification and its own approval.

Checklist

Classify first, announce the path, then create a task for each item on your path and complete them in order.

Spike:

  1. Explore project context — enough to frame the probe

  2. Present question + probe plan — 2-3 sentences

  3. Get approval — a nod is enough

  4. Investigate — as cheaply as correctness allows

  5. Report findings — a recommendation; label anything built as throwaway

Bounded:

  1. Explore project context — check files, docs, recent commits

  2. Ask clarifying questions — one at a time, the ones that matter

  3. Present short design in chat — approach, files touched, testing

  4. Get approval — STOP and wait for an explicit yes; presenting the design and starting in the same breath is skipping the gate

  5. Implement — proceed with the normal development workflow (TDD applies); no plan document

Architectural:

  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

digraph brainstorming {
    "Classify: spike / bounded / architectural" [shape=diamond];
    "Present question + probe (2-3 sentences)" [shape=box];
    "Ask clarifying questions (bounded)" [shape=box];
    "Present short design in chat" [shape=box];
    "Human approves?" [shape=diamond];
    "Investigate; report recommendation" [shape=doublecircle];
    "Implement via normal workflow (no plan doc)" [shape=doublecircle];
    "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];
    "Hidden complexity? Upgrade path" [shape=box];

    "Classify: spike / bounded / architectural" -> "Present question + probe (2-3 sentences)" [label="spike"];
    "Classify: spike / bounded / architectural" -> "Ask clarifying questions (bounded)" [label="bounded"];
    "Classify: spike / bounded / architectural" -> "Explore project context" [label="architectural"];
    "Present question + probe (2-3 sentences)" -> "Human approves?";
    "Ask clarifying questions (bounded)" -> "Present short design in chat";
    "Present short design in chat" -> "Human approves?";
    "Human approves?" -> "Investigate; report recommendation" [label="spike: yes"];
    "Human approves?" -> "Implement via normal workflow (no plan doc)" [label="bounded: yes"];
    "Hidden complexity? Upgrade path" -> "Classify: spike / bounded / architectural";
    "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"];
}

Terminal states are path-bound. Architectural: the ONLY skill you invoke after brainstorming is writing-plans — never frontend-design, mcp-builder, or any other implementation skill. Bounded: after approval, implementation proceeds directly through the normal development workflow; no plan document. Spike: the terminal state is a reported recommendation.

The Process

The subsections below serve the bounded and architectural paths (a spike stops at "present the probe, get a nod"). Sections from Exploring approaches onward are architectural-path depth — for bounded work, context plus a few questions plus a short in-chat design is the whole 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

  • YAGNI ruthlessly - remove unnecessary features from every approach and design

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.

After the Design (architectural path)

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.

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

Files

scripts/start-server.sh

#!/usr/bin/env bash
# Start the brainstorm server and output connection info
# Usage: start-server.sh [--project-dir <path>] [--host <bind-host>] [--url-host <display-host>] [--foreground] [--background]
#
# Starts server on a random high port, outputs JSON with URL.
# Each session gets its own directory to avoid conflicts.
#
# Options:
#   --project-dir <path>  Store session files under <path>/.superpowers/brainstorm/
#                         instead of /tmp. Files persist after server stops.
#   --host <bind-host>    Host/interface to bind (default: 127.0.0.1).
#                         Use 0.0.0.0 in remote/containerized environments.
#   --url-host <host>     Hostname shown in returned URL JSON.
#   --idle-timeout-minutes <n>  Shut down after n minutes idle (default 240 = 4h).
#   --open                Auto-open the browser on the first screen (use only
#                         after the user approves the visual companion).
#   --foreground          Run server in the current terminal (no backgrounding).
#   --background          Force background mode (overrides Codex auto-foreground).

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"

# Parse arguments
PROJECT_DIR=""
FOREGROUND="false"
FORCE_BACKGROUND="false"
BIND_HOST="127.0.0.1"
URL_HOST=""
IDLE_TIMEOUT_MINUTES=""
while [[ $# -gt 0 ]]; do
  case "$1" in
    --project-dir)
      PROJECT_DIR="$2"
      shift 2
      ;;
    --host)
      BIND_HOST="$2"
      shift 2
      ;;
    --url-host)
      URL_HOST="$2"
      shift 2
      ;;
    --idle-timeout-minutes)
      IDLE_TIMEOUT_MINUTES="$2"
      shift 2
      ;;
    --open)
      export BRAINSTORM_OPEN=1
      shift
      ;;
    --foreground|--no-daemon)
      FOREGROUND="true"
      shift
      ;;
    --background|--daemon)
      FORCE_BACKGROUND="true"
      shift
      ;;
    *)
      echo "{\"error\": \"Unknown argument: $1\"}"
      exit 1
      ;;
  esac
done

if [[ -z "$URL_HOST" ]]; then
  if [[ "$BIND_HOST" == "127.0.0.1" || "$BIND_HOST" == "localhost" ]]; then
    URL_HOST="localhost"
  else
    URL_HOST="$BIND_HOST"
  fi
fi

if [[ -n "$IDLE_TIMEOUT_MINUTES" ]]; then
  if ! [[ "$IDLE_TIMEOUT_MINUTES" =~ ^[0-9]+$ ]] || [[ "$IDLE_TIMEOUT_MINUTES" -lt 1 ]]; then
    echo "{\"error\": \"--idle-timeout-minutes must be a positive integer\"}"
    exit 1
  fi
  export BRAINSTORM_IDLE_TIMEOUT_MS=$(( IDLE_TIMEOUT_MINUTES * 60 * 1000 ))
fi

is_windows_like_shell() {
  case "${OSTYPE:-}" in
    msys*|cygwin*|mingw*) return 0 ;;
  esac
  if [[ -n "${MSYSTEM:-}" ]]; then
    return 0
  fi
  local uname_s
  uname_s="$(uname -s 2>/dev/null || true)"
  case "$uname_s" in
    MSYS*|MINGW*|CYGWIN*) return 0 ;;
  esac
  return 1
}

# Some environments reap detached/background processes. Auto-foreground when detected.
if [[ -n "${CODEX_CI:-}" && "$FOREGROUND" != "true" && "$FORCE_BACKGROUND" != "true" ]]; then
  FOREGROUND="true"
fi

# Windows/Git Bash reaps nohup background processes. Auto-foreground when detected.
if [[ "$FOREGROUND" != "true" && "$FORCE_BACKGROUND" != "true" ]]; then
  if is_windows_like_shell; then
    FOREGROUND="true"
  fi
fi

# Session files (server.log, server-info, .last-token) embed the session key —
# keep everything this script and the server create owner-only.
umask 077

# Generate unique session directory
SESSION_ID="$$-$(date +%s)"

if [[ -n "$PROJECT_DIR" ]]; then
  SESSION_DIR="${PROJECT_DIR}/.superpowers/brainstorm/${SESSION_ID}"
  # Persist the bound port and key per project so a restart reuses them and an
  # already-open browser tab reconnects to the same URL with a valid cookie.
  export BRAINSTORM_PORT_FILE="${PROJECT_DIR}/.superpowers/brainstorm/.last-port"
  export BRAINSTORM_TOKEN_FILE="${PROJECT_DIR}/.superpowers/brainstorm/.last-token"
else
  SESSION_DIR="/tmp/brainstorm-${SESSION_ID}"
fi

STATE_DIR="${SESSION_DIR}/state"
PID_FILE="${STATE_DIR}/server.pid"
LOG_FILE="${STATE_DIR}/server.log"
SERVER_ID_FILE="${STATE_DIR}/server-instance-id"

# Create fresh session directory with content and state peers
mkdir -p "${SESSION_DIR}/content" "$STATE_DIR"

SERVER_ID=""
if [[ -r /dev/urandom ]]; then
  SERVER_ID="$(od -An -N24 -tx1 /dev/urandom 2>/dev/null | tr -d ' \n' || true)"
fi
if ! [[ "$SERVER_ID" =~ ^[A-Za-z0-9_-]{32,64}$ ]]; then
  SERVER_ID="$(printf '%08x%08x%08x%08x' "$$" "$(date +%s)" "${RANDOM:-0}" "${RANDOM:-0}")"
fi
printf '%s\n' "$SERVER_ID" > "$SERVER_ID_FILE"
chmod 600 "$SERVER_ID_FILE" 2>/dev/null || true

# Kill any existing server
if [[ -f "$PID_FILE" ]]; then
  old_pid=$(cat "$PID_FILE")
  kill "$old_pid" 2>/dev/null
  rm -f "$PID_FILE"
fi

cd "$SCRIPT_DIR" || exit 1

# Resolve the harness PID (grandparent of this script).
# $PPID is the ephemeral shell the harness spawned to run us — it dies
# when this script exits. The harness itself is $PPID's parent.
OWNER_PID="$(ps -o ppid= -p "$PPID" 2>/dev/null | tr -d ' ')"
if [[ -z "$OWNER_PID" || "$OWNER_PID" == "1" ]]; then
  OWNER_PID="$PPID"
fi

# Windows/MSYS2: Node.js cannot see POSIX PIDs from the MSYS2 namespace.
# Passing a PID node cannot verify causes server to log owner-pid-invalid
# and self-terminate at the 60-second lifecycle check. Clear it so the
# watchdog is disabled and the idle timeout becomes the only shutdown trigger.
if is_windows_like_shell; then
  OWNER_PID=""
fi

# Foreground mode for environments that reap detached/background processes.
if [[ "$FOREGROUND" == "true" ]]; then
  env BRAINSTORM_DIR="$SESSION_DIR" BRAINSTORM_HOST="$BIND_HOST" BRAINSTORM_URL_HOST="$URL_HOST" BRAINSTORM_OWNER_PID="$OWNER_PID" node server.cjs "--brainstorm-server-id=$SERVER_ID" &
  SERVER_PID=$!
  echo "$SERVER_PID" > "$PID_FILE"
  wait "$SERVER_PID"
  exit $?
fi

# Start server, capturing output to log file
# Use nohup to survive shell exit; disown to remove from job table
nohup env BRAINSTORM_DIR="$SESSION_DIR" BRAINSTORM_HOST="$BIND_HOST" BRAINSTORM_URL_HOST="$URL_HOST" BRAINSTORM_OWNER_PID="$OWNER_PID" node server.cjs "--brainstorm-server-id=$SERVER_ID" > "$LOG_FILE" 2>&1 &
SERVER_PID=$!
disown "$SERVER_PID" 2>/dev/null
echo "$SERVER_PID" > "$PID_FILE"

# Wait for server-started message (check log file)
for _ in {1..50}; do
  if grep -q "server-started" "$LOG_FILE" 2>/dev/null; then
    # Verify server is still alive after a short window (catches process reapers)
    alive="true"
    for _ in {1..20}; do
      if ! kill -0 "$SERVER_PID" 2>/dev/null; then
        alive="false"
        break
      fi
      sleep 0.1
    done
    if [[ "$alive" != "true" ]]; then
      echo "{\"error\": \"Server started but was killed. Retry in a persistent terminal with: $SCRIPT_DIR/start-server.sh${PROJECT_DIR:+ --project-dir $PROJECT_DIR} --host $BIND_HOST --url-host $URL_HOST --foreground\"}"
      exit 1
    fi
    grep "server-started" "$LOG_FILE" | head -1
    exit 0
  fi
  sleep 0.1
done

# Timeout - server didn't start
echo '{"error": "Server failed to start within 5 seconds"}'
exit 1

Requirements and compatibility

Written for: OpenAI Codex

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Needs Node.js

Security

What our scanner noticed· Low risk

  • Scripts that your agent may run

This skill includes scripts that your agent may run. Read them before you use it.

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

Attribution and licence

Created by
Jesse Vincent
Publisher
OpenAI (Official)
Distributed by
OpenAI
Source
openai/plugins · plugins/superpowers/skills/brainstorming · commit d420d13
Licence
MIT License (redistribution allowed)
  • LICENSE (added by AutoGineer from plugins/superpowers/LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced

AutoGineer is not affiliated with or endorsed by Jesse Vincent or OpenAI.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download brainstorming.zip