brainstorm

A guided conversation for exploring an idea, clarifying the problem, and deciding what to build. It is intended for the early stage before writing a product requirements document, which describes a product’s needs and behaviour.

In plain words
What is it for?
Use it to discuss a new product idea, investigate user problems, and prepare notes for later planning and development.
Why use it?
It helps when the direction is unclear or an idea is still loosely formed. It turns scattered thoughts into clearer problems and possible approaches.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/pillip/claude-dev-kit/brainstorm
Any agent
npx skills add pillip/claude-dev-kit --skill brainstorm
Clone the repo
git clone --depth 1 https://github.com/pillip/claude-dev-kit

Made for: Claude Code, Codex.

Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,503 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00023 $0.01503
Opus 5 $0.00012 $0.00751
Sonnet 5 $0.00005 $0.00301
Haiku 4.5 $0.00002 $0.00150

Measured 2d ago against content hash e5afb12a4f65, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 2d 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/brainstorm/SKILL.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kit Preamble — brainstorm

Kit Script Root

Kit root: ${CLAUDE_PLUGIN_ROOT}

  • Absolute path above → plugin install (substituted at load time; no project scripts/ dir): prefix every kit script command with it, e.g. bash <kit-root>/scripts/checkpoint.sh …. Absolute paths also work from worktrees.
  • Literal ${…} placeholder above → standalone layout: run commands as written.

Project Context Detection

Run these checks silently at the start. Use results to adapt behavior:

  • [ -f issues.md ] — if true, this project uses the sprint system. Respect issue numbering and STATUS.md.
  • [ -f docs/sprint_state.md ] — if true and Status shows running, a sprint is active. Be aware of parallel work in worktrees.
  • [ -f docs/prd_digest.md ] — if true, read it for quick project context before starting.

Kit Rules

  • Verify gh auth status before any GitHub operation. Steps:
  1. Determine the output path ($ARGUMENTS or docs/brainstorm_notes.md).
  2. Check if the file already exists at that path.

If the file does NOT exist (New Session):

3a) Ask the user to freely describe their idea, problem, or direction — anything goes. 4a) Discovery phase: Explore the problem space with Socratic questions: - Who has this problem? Why does it matter? - What does success look like? What constraints exist? Ask 1–2 questions at a time. Do not overwhelm. Discovery is conversational and not research-grounded — keep it light. 5a) Existing Landscape research (only this section is research-grounded; per SPEC-018 platform-first delegation): - Probe runtime: python3 scripts/has_skill.py deep-research - Exit 0 OR 2 → primary path: invoke /deep-research with a scoped question about competing solutions / existing tools / market landscape for the user's problem. Pass the report through python3 scripts/synthesize_from_deep_research.py --mode brainstorm to render the Existing Landscape section. Then run the synthesizer-auditor: invoke Task with subagent_type: synthesizer-auditor, inputs = (rendered Existing Landscape draft, /deep-research report). Block save on claim_dropped / claim_distorted / evidence_distorted / scope_change findings. - Exit 1 → degraded path: ask the user for 1–3 source URLs about existing solutions. For each URL: python3 scripts/capture_source.py <url>. Construct each landscape claim per templates/research_claim.md. Validate every claim with python3 scripts/validate_research_claim.py --claim-file <claim>.json; block save on non-ok verdicts. Run Task with subagent_type: research-auditor, inputs = (draft, docs/references/research/). Block save on context_contradicts / scope_change findings. - No source available on either path → render the section as the literal line Data: not available — re-run /deep-research with a sharper question or accept "no data". Never paraphrase to fill in. 6a) Ideation phase: Once the problem is clear, propose 2–3 solution directions with brief pros/cons for each. Help the user narrow down. This step is authored opinion, not research-grounded. 7a) Synthesize findings into the brainstorm notes format (Problem Space, Existing Landscape, Idea Candidates, Decisions).

Read the full file on GitHub · 83 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. 2d ago First seen · 83 lines · 23 tokens per session scan A e5afb12a4f65

Subscribe to this mod's changes

brainstorm is a skill published in the GitHub repository pillip/claude-dev-kit (11 stars, last pushed 16d ago), licensed MIT. It adds 23 tokens to every session and 1,503 once invoked, about $0.0001 per session on Opus 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 2026-08-30.